Electric Scooters For Kids

Hydraulic Disc

Hydraulic mechanical gearbox

The invention relates, on the one hand, to a hydro mechanical gearbox with a hydraulic pump, a hydraulic motor and a set of planetary gears, whereby the pressure line of the hydraulic pump is conducted back, via the inserted hydraulic motor, to the suction line of the hydraulic pump, thereby forming a circuit, and whereby either the sun wheel or the planet-carrier of the set of planetary gears is coupled in a rotationally fixed manner to the driven shaft of the gearbox, and the other one of these two elements of the planetary gear is coupled in the same manner to the output shaft of the gearbox.

A series of gearbox designs, which also include the hydraulic gearbox in which a hydraulic pump drives a hydraulic motor via an oil circuit, have become known from the prior art. In hydraulic gearboxes of this kind, however, the efficiency declines rapidly with rising rotational speeds, since flow resistances make themselves felt in a disadvantageous manner as the speed of flow of the hydraulic oil increases. Consequently, a particularly large amount of energy is wasted precisely when the maximum output is required of the gearbox, with the result that the internal-combustion motor providing the drive has to be overdimensioned to a relatively major extent.

These disadvantages of the arrangements known from the prior art result in the problem, which is initiating the present invention, of designing an infinitely variable gearbox which develops its optimum efficiency precisely when the maximum throughput of energy occurs.

This problem is successfully solved in a gearbox of the above described type when one rotational unit of the hydraulic motor, preferably its rotor, is coupled in a rotationally fixed manner to the driven shaft of the gearbox, and the other unit of the hydraulic motor, preferably its static part, is coupled either to the frame/housing of the gearbox or to its output shaft. As will be further explained later on, in an arrangement of this type, the delivery quantity of the hydraulic pump declines as the rotational speed of the output shaft rises, until it finally becomes absolutely zero at a maximum rotational speed.

This means that, at high rotational speeds at which the greatest output is taken off at the output shaft, no flow losses occur in the hydraulics and therefore the efficiency reaches its maximum. Because of its favorable efficiency, a gearbox of this type permits a reduction in the structural size of the driving motor. As one rotational part of the hydraulic motor is coupled in a rotationally fixed manner to the driven shaft of the gearbox, it is possible to transfer rotational energy from the output shaft of the gearbox through the hydraulic oil circuit to the driven shaft, so that in the case of a pushing load the stabilizing characteristics of a combustion engine can be used to limit the rotational speed of the gearbox elements.

The inventive hydro mechanical gearbox offers the possibility of controlling the speed of a vehicle through the gear ratio, while the combustion engine runs at a nearly constant speed, where the torque is as high as possible or its efficiency has its best value. The dynamical characteristics of the inventive gearbox are superior, because at a standstill of the vehicle the hydraulic pump runs at a high speed, so that a great amount of rotational energy is stored within its rotating masses. When the vehicle starts, these rotating masses are decelerated, whereby the stored amount of energy is delivered at the output shaft additionally to the amount of energy, which is directly transmitted from the combustion engine. So at the moment, when the vehicle starts, the inventive hydro mechanical gearbox may have an efficiency of more than 100%. This aspect is very important for tractors for agricultural purposes, which operate often at a rough or steep landscape. If the tractor has to start from an inclined position, at the moment of disconnecting the brake the gearbox has to deliver the full output at its output shaft.

One possible way of adjusting the gearing ratio of the gearbox according to the invention consists in the fact that the delivery quantity of the hydraulic pump is adjustable. With the intake volume of the hydraulic motor unchanged, it is possible, by adjusting the delivery quantity of the hydraulic pump, to change the braking action of the latter and in this way achieve an adjustment of the gearing of the gearbox. Axial piston pumps, for example, are suitable for this purpose since, in the case of these pumps, the inclination of the oblique disc actuating the axial piston is adjustable during operation. Axial control pistons, which are connected to the pump casing in a rotationally fixed manner, are used for this purpose.

A hydraulic motor offers a greater or lesser working resistance, depending upon the mechanical load, to the hydraulic oil taken in, and can therefore be used for throttling the flow of oil. One particular advantage of such an arrangement lies in the fact that the energy drawn off as a result of the throttling-down of the hydraulic pump providing the drive is not lost but is re-introduced to the driving shaft of the gearbox in the form of an additional torque, so that the combustion engine is unburdened. Since it is also possible, by varying the throttling, to influence the braking action of the hydraulic pump and, with it, the gearing ratio of the gearbox according to the invention, the said invention provides for the possibility of adjusting the intake volume of the hydraulic motor.

If, therefore, the intake volume of the hydraulic motor is set lower than the delivery volume of the hydraulic pump, the delivery flow of the latter is supported on the hydraulic motor, so that the hydraulic pump is braked. The use of an axial piston motor as the hydraulic motor suggests itself since, in the case of the said hydraulic piston motor, adjustment of the intake volume is possible by changing the inclination of the oblique disc actuated by the axial control piston. A hydraulic motor of this kind is based on a reversal of the operation of the hydraulic pump principle, so that the hydraulic motor can be constructed, at least in principle, so as to be structurally identical to the hydraulic pump coupled to the set of planetary gears.

It lies within the scope of the invention that the control pistons for the hydraulic pump, and also, optionally, for the hydraulic motor, are hydraulically actuated. In this event, the hydraulic pressure necessary for this purpose can be taken off, in a particularly advantageous manner, from a gas pressure/spring reservoir which is fed by the hydraulic pumps of the gearbox according to the invention.

About the Author

Zhongyi Hydraulic Motor Company is a professional engaged in gearbox,radial piston motor,axial piston motor,piston motor,slewing transmission,danfoss motor,hydraulic orbital motor,hydraulic steering,hydraulic steering unit,hydraulic winch. All products are strictly tested before delivery by testing bench and comprehensive testing facilities to ensure the quality.

Avid Hydraulic Bleed Kit $50.99 Avid Hydraulic Bleed Kit. For bleeding your Avid hydraulic disc brakes.

Avid Elixir R 160 Hydraulic Disc Brakes $155.99 Avid Elixir R 160 Hydraulic Disc Brakes. The Avid Elixir R hydraulic disc brake from SRAM delivers pure, simple performance that you can count on every time you grip the levers. Like all of Avid's new hydraulic disc brakes, it features TaperBore Technology, tool-free reach adjustment, Power Reserve Geometry, Tri-Align Caliper Positioning System, and drip-free bleeding. Sure, it lacks the Elixir CR's carbon lever and adjustable banjo, but then again, it also costs less. Pair it up with the SRAM X7 family and you've got yourself a whole heap of priceless riding ahead of you.

Avid Elixir CR 185 Hydraulic Disc Brakes $227.99 Avid Elixir CR 185 Hydraulic Disc Brakes. The brake that fits right in with the SRAM X9 family. With SRAM's unique TaperBore Technology, the Avid Elixir CR hydraulic disc brake is lighter and more powerful than ever. Tool-free contact point adjustment and reach adjustment let you customize your ride. Adjustable banjo for dialing in maximum power and performance.

Shimano XTR BR-M988 Hydraulic Disc Brakes for Trail $289.99 Shimano XTR BR-M988 Hydraulic Disc Brakes for Trail. Shimano loaded the new XTR M988 hydraulic disc brakes with tons of new technology to produce a brake set that's lightweight, compact and delivers more braking power. Engineered specifically for the trail rider, the XTR M988 trail brake builds on the features of the race brake and added a short-stroke SERVO-WAVE mechanism for quicker engagement and 25% more power, additional adjustability, and Ice-Tech pads. To enhance control and ergonomics, Shimano gave the new brakes a shorter, 14mm-wide lever blade and a post-mount caliper optimized to minimize weight and to enhance stiffness and insulation.

SRAM XO 160mm Hydraulic Disc Brake $260.99 SRAM XO 160mm Hydraulic Disc Brake. Introducing the first brake good enough to take the X0 name. Weighing in at only 333g, the full-featured SRAM X0 hydraulic brake features a slim, bar-hugging design that packs all the power and control you have come to expect from the Avid Elixir line of brakes. All-new forged aluminum calipers and lever bodies deliver robust power at a fraction of the weight, and adjustable reach and detented tool-free Contact Point Adjustment makes it easy to dial in perfect performance.

Shimano XTR M975 Pre-Bled Hydraulic Disc Brake Kit $229.99 Shimano XTR M975 Pre-Bled Hydraulic Disc Brake Kit. The new XTR disc brake kit retains Shimano's signature control through superior modulation. Pre-Bled Kit is ready for installation right out of the box!

Shimano Deore XT BL-M775 Hydraulic Disc Brake Levers $139.99 Shimano Deore XT BL-M775 Hydraulic Disc Brake Levers. Imagine a pair of brake levers that provide quick and responsive stopping power with a totally customized fit. Don't worry...you don't have to wake up! Shimano has turned this dream into a reality for every mountain enthusiast, thanks to their redesigned Deore XT Hydraulic disc brake levers.

Shimano XTR BR-M985 Hydraulic Disc Brake for XC Race $269.99 Shimano XTR BR-M985 Hydraulic Disc Brake for XC Race. Shimano loaded the new XTR M985 hydraulic disc brakes with tons of new technology to produce a brake set that's lightweight, compact and delivers a 10% increase in braking power. Engineered specifically for the XC racer, the XTR M985 race brake features a compact lever design with integrated barrel reservoir and hinged band clamp. To enhance control and ergonomics, Shimano gave the new brakes a shorter, 13mm-wide lever blade and a post-mount caliper optimized to minimize weight and to enhance stiffness and insulation.

Brandt Hydraulic Stool, Black $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Buckskin $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Burgundy $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Gunmetal $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Taupe $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, White $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Parchment $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Teal $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Violet $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Chestnut Brown $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Dove Gray $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Dusty Jade $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Navy Blue $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool with Backrest, Taupe $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool with Backrest, Teal $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool with Backrest, Violet $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool with Backrest, White $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool, Sea Foam $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Space Blue $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool with Backrest, Black $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool, Regimental Blue $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool with Backrest, Buckskin $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool with Backrest, Burgundy $694.26 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool, Saddle Tan $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool, Tea Rose $649.34 Features of the Brandt Hydraulic Stool: Hydraulically adjustable by means of a convenient foot pedal — raises, lowers or locks the chair anywhere within its 360° range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available with backrest (BRT-15512).

Brandt Hydraulic Stool with Backrest, Gunmetal $694.26 Features of the Brandt Hydraulic Stool Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes. Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Brandt Hydraulic Stool with Backrest, Parchment $694.26 Features of the Brandt Hydraulic Stool Hydraulically adjustable by means of a convenient foot pedal – raises, lowers or locks the chair anywhere within its 360º range of rotation without the use of one’s hands. Rotation of the seat does not affect the stool height. Cast aluminum base fitted with 2" twin disc nylon casters with locking brakes Height adjustment: 22.5" to 29.5". Diameter: 23". Stool is also available without backrest (BRT-15511).

Hydraulic Brake Pads Scooter Part $10.9 Front hydraulic disc brake pads used on some 4-stroke, super pocket bikes and mini-choppers. Check measurements and fit before ordering. Large Pad Length: 74mm Bolt Hole Spacing: 58mm Height: 37mm Thickness: 6.4mm Small Pad Length: 38mm Height: 28mm Thickness: 9mm These are used on Pocket Bikes and Mini Choppers only. Related Scooters And Accessories: Scooter Parts Gas Scooters Motorized Scooters Electric Scooters Toys

Aztec Stainless Steel Disc Rotor $39.99 Aztec Stainless Steel Disc Rotor. The Aztec Stainless Steel replacement disc rotor works with all brands of hydraulic and mechanical disc calipers.

Avid BB7 Mechanical Disc Brakes $78.99 Avid BB7 Mechanical Disc Brakes. The Avid BB7 takes the incredible stopping power of hydraulic disc brakes and combines it with the ease and simplicity of mechanical disc brakes!

Shimano Disc Brake Bleed Kit $17.99 Shimano Disc Brake Bleed Kit. Flush and refill your Shimano XTR or XT hydraulic disc brakes with this environmentally friendly bleed kit. Kit includes 50ml of hydraulic mineral oil, tubing, and instructions.

Hydraulic Groove $8.99 Hydraulic Groove