CN2165091Y - Hydraulic transmission for bicycle - Google Patents

Abstract

The utility model relates to a hydraulic transmission for a bicycle, which is mainly characterized in that an oil motor is installed on the back wheel of the bicycle. An oil pump which is provided with two piston rods whose stretch out ends have pedal plates is adopted to drive the oil motor, and therefore, to drive the back wheel to rotate. A power reservoir is also provided. The hydraulic transmission can enable the general speed of a bicycle to reach 34 kilometers per hour and the highest speed of bicycle to reach 52 kilometers per hour, especially in the hillside and hilly areas where the significant advantages of high speed and labour saving can be shown.

Description

Hydraulic transmission for bicycle

The utility model belongs to the trackless terrestrial vehicle technical field, is a kind of bicycle fluid pressure drive device.

Existing bicycle driving device is that crank and stretcher are housed on the axis of bicycle, and the sprocket wheel on the axis is linked to each other with sprocket wheel on the hind axle with chain, two pedal stretchers by the people when bicycle is advanced are made circular movement by crank, the drive axis rotates, and by chain trailing wheel is rotated.Because stretcher is to make circular movement, the manpower propulsive effort becomes alternating force, and effort influences the speed of a motor vehicle and improves.

The purpose of this utility model is that design a kind ofly can improve the speed of a motor vehicle, is riding labour-saving constant force bicycle driven fluid pressure drive device.

The main technical schemes that the utility model is taked is improved existing bicycle driving device, keep its stretcher, adopt the output shaft of oil motor to link to each other with bicycle rear shaft drive, and adorn two displacement oil pumps in the spider both sides of bicycle, the external part of piston rod is equipped with stretcher, the piston-less lumen of two-piston formula oil pump was communicated with by communicating pipe, and in hydraulic oil is housed, each displacement oil pump have rod end chamber by check valve respectively with fuel tank, the input port of oil motor is communicated with, the delivery port of oil motor is communicated with fuel tank by two position two-way valve, constitutes the normal operation loop; The input port of oil motor is communicated with an energy-storing device by two position two-way valve, and the delivery port of oil motor is communicated with energy-storing device by a check valve, constitutes energy storage, executes the energy loop; The input of oil motor, a delivery port two position two-way valve in parallel constitute an idle running loop, thereby constitute a kind of bicycle fluid pressure drive device.

The utility model provides a kind of desirable fluid pressure drive device for the manpower bicycle, drive the trailing wheel rotation owing to adopt displacement oil pump to drive oil motor, stretcher changes straight-line motion into by original circular movement, overcome the dead point, make manpower become constant force, therefore power rises to 93%, is equivalent to 2.27 times of existing Cycle Power.Scooter is 34 kilometers when general, and F-Zero can reach 52 kilometers.This bicycle fluid pressure drive device also can be used to drive manpower bicycles such as three-wheel vehicle.Used the bicycle of this device to be applicable to various areas, particularly hillside Qiu Ling area.Compare with existing bicycle driving device, have remarkable advantages such as power is big, the speed of a motor vehicle is high, laborsaving.

Reach the specific structural features that example further specifies the utility model bicycle fluid pressure drive device in conjunction with the accompanying drawings.

Fig. 1 represents the oil piping system figure of the utility model bicycle fluid pressure drive device.

Fig. 2 represents the structure assembling scheme drawing of the utility model bicycle fluid pressure drive device.

Referring to Fig. 1, Fig. 2, the utility model bicycle fluid pressure drive device comprises: oil pump 3,10, stretcher 4,9, fuel tank 7, oil motor 18, energy-storing device 16, in line check valve 5,8, fuel-displaced check valve 1,12, two position two-way valve 15,19,20, oil inlet 6, high pressure fuel pipe 14, communicating pipe 13.The piston-less lumen of oil pump 3,10 was communicated with by communicating pipes 13, and in hydraulic oil is housed.The external part of piston rod 2,11 is equipped with stretcher 4,9, the rod end chamber that has of oil pump 3,10 passes through in line check valve 5,8 respectively, oil inlet 6 is communicated with fuel tank 7, the rod end chamber that has of oil pump 3,10 passes through fuel-displaced check valve 1,12, high pressure fuel pipe 14 is communicated with the input port 22 of oil motor 18, the delivery port 21 of oil motor 18 is communicated with fuel tank 7 by two position two-way valve 20, constitutes the normal operation loop; The input port 22 of oil motor 18 is communicated with energy-storing device 16 by two position two-way valve 15, and delivery port 21 is communicated with energy-storing device 16 by check valve 17, constitutes energy storage, executes the energy loop; Input port 22 delivery ports 21 two position two-way valves 19 in parallel of oil motor 18 constitute the idle running loop.Oil motor 18 is fixed on by flange on the horizontal stand of bicycle, and the output shaft of oil motor 18 links to each other with bicycle rear shaft by key.Two oil pumps 3,10 are fixed on the spider both sides of bicycle middle shaft position, and fuel tank 7 is fixed on the spider, thereby constitute a kind of bicycle fluid pressure drive device.

During the bicycle cruising, two position two-way valve 15,19 is in open position, and two position two-way valve 20 is in control position.The cyclist is pedaled stretcher 4 downwards with pin, promoting piston by piston rod 2 moves downward, the rod end chamber that has of oil pump 3 forms vacuum, hydraulic oil in the fuel tank 7 enters the rod end chamber that has of oil pump through oil inlet 6, in line check valve 5,8, the hydraulic oil of the piston-less lumen of oil pump 3 enters the piston-less lumen of oil pump 10 through communicating pipe 13 simultaneously, promote piston, piston rod 11, stretcher 9 upward movements, make oil pump have the hydraulic oil of rod end chamber to enter oil motor 18 and make its rotation by fuel-displaced check valve 1, high pressure fuel pipe 14.When stretcher 4 walked to nadir by piston rod 2 promotion pistons, foot-operated 9 walked to vertex.Otherwise pedal stretcher 9 downwards, in like manner can make oil pump 3 have the hydraulic oil of rod end chamber to enter oil motor 18 through fuel-displaced check valve 12, high pressure fuel pipe 14, the hydraulic oil that enters oil motor 18 returns fuel tank 7 through two position two-way valve 20; When travelling on the flat road, descending or brake under three kinds of situations, put two position two-way valve 20 in open position, hydraulic oil is exported after check valve 17 enters energy-storing device 16 by oil motor 18, when bicycle goes up a slope, two position two-way valve 15 is placed control position, and the hydraulic oil of energy-storing device 16 enters oil motor 18 through two position two-way valve 15; When pump quits work, when bicycle moves on by inertia, two position two-way valve 20 is placed open position, and two position two-way valve 19 is placed control position, hydraulic oil enters oil motor 18 again through two position two-way valve 19 and circulates after entering oil motor 18 outputs.

Claims (1)

1, a kind of bicycle fluid pressure drive device, has stretcher, it is characterized in that also having displacement oil pump, oil motor, fuel tank, energy-storing device, check valve, two position two-way valve, the external part of the piston rod of two-piston formula oil pump is equipped with stretcher, the piston-less lumen of two-piston formula oil pump was communicated with by communicating pipe, and in hydraulic oil is housed, the rod end chamber that has of each displacement oil pump passes through check valve, respectively with fuel tank, the input port of oil motor is communicated with, and the delivery port of oil motor is communicated with fuel tank by two position two-way valve, and the input port of oil motor is communicated with energy-storing device by two position two-way valve, the delivery port of oil motor is communicated with energy-storing device by check valve, the input of oil motor, delivery port two position two-way valve in parallel.

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