An automatic oiling device for shock absorbers on the front wheel of an electric bicycle

Abstract

This invention belongs to the field of shock absorbers, and specifically relates to an automatic oiling device for a shock absorber used on the front wheel of an electric bicycle. The device includes a shock absorber, which is divided into a compression chamber and a return chamber via a damping valve. The compression chamber and return chamber are respectively connected to a compression control valve and a return control valve. The compression control valve is connected to the return control valve. A flow meter is installed at the connection between the compression chamber and the compression control valve. The compression control valve, the return control valve, and the flow meter are all connected to a controller. The return control valve is connected to an oil pump. The controller obtains the hydraulic oil flow rate measured by the flow meter to determine whether the hydraulic oil damping in the shock absorber is normal. The controller controls the compression control valve and the return control valve to store hydraulic oil in the shock absorber into the oil pump or to replenish hydraulic oil in the oil pump into the shock absorber.

Description

Technical Field

[0001] This invention belongs to the field of shock absorbers, and in particular relates to an automatic oiling device for a shock absorber on the front wheel of an electric bicycle. Background Technology

[0002] Shock absorbers are used to suppress the impact generated by the spring during its recovery after damping and the impact from the road surface. They are widely used in vehicles to accelerate the damping of the frame and body, thereby improving ride comfort. After driving over uneven roads, although the shock absorber spring can filter road vibrations, the spring itself will also have reciprocating motion, and the shock absorber is used to suppress the spring bounce.

[0003] The damping force generated by the extended stroke of the shock absorber is greater than that generated by the compression stroke of the damping force, in order to meet the requirements of rapid shock absorption. However, the damping force will convert the elastic deformation energy in the process into heat, so the shock absorber will generate heat during operation.

[0004] For example, the shock absorber disclosed in Chinese invention patent CN106536965B has an outer tube, an inner tube coaxially disposed within the outer tube, and a piston reciprocatingly mounted within the inner tube. The inner tube forms a working chamber for hydraulic oil, while an annular replenishment chamber is formed between the inner and outer tubes. The improved base plate and base cage assembly promote fluid flow from the replenishment chamber to the working chamber during the shock absorber's extension cycle. However, during operation, the piston often generates damping energy with the hydraulic oil within the inner tube due to the need to convert the elastic potential energy of the buffer spring, converting energy into heat. The heated hydraulic oil becomes thinner and increases in volume, while the cooled hydraulic oil becomes viscous and decreases in volume, thus affecting the piston's ability to maintain stable damping. Therefore, an automatic oiling device for electric bicycle front wheel shock absorbers is needed, capable of automatically regulating and releasing the internal oil pressure and automatically replenishing the oil. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes an automatic oiling device for shock absorbers on the front wheel of electric bicycles, which effectively solves the technical problem in the prior art where temperature changes affect the damping stability of the shock absorber during use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic oiling device for a front wheel shock absorber of an electric bicycle, comprising a shock absorber, wherein the shock absorber is divided into a compression chamber and a return chamber by a damping valve, the compression chamber and the return chamber are respectively connected to a compression control valve and a return control valve, the compression control valve is connected to the return control valve, a flow meter is installed at the connection between the compression chamber and the compression control valve, the compression control valve, the return control valve and the flow meter are all connected to a controller, and the return control valve is connected to an oil pump. The controller obtains the hydraulic oil flow rate measured by the flow meter to determine whether the hydraulic oil damping in the shock absorber is normal, and controls the compression control valve and the return control valve to store the hydraulic oil in the shock absorber into the oil pump or to replenish the hydraulic oil in the oil pump into the shock absorber.

[0007] Furthermore, the shock absorber includes a pipe wall, a damping valve, and a spring. The damping valve includes a slider slidably connected to the pipe wall and a shock-absorbing piston rod connected below the slider and passing through the lower part of the pipe wall. The slider has a damping hole, and a spring plate is disposed below the damping hole. The spring is sleeved on the pipe wall. The upper and lower ends of the spring plate abut against the pipe wall and the lower end of the shock-absorbing piston rod, respectively. The damping hole on the slider cooperates with the spring plate to generate damping in the shock absorber.

[0008] Furthermore, a return oil channel is provided inside the pipe wall. The upper end of the return oil channel is connected to a return control valve, and the lower end of the return oil channel is connected to a return chamber. Through the return oil channel inside the pipe wall, the circulating hydraulic oil can be well cooled through the pipe wall before being input back into the return chamber.

[0009] Furthermore, the compression control valve and the return control valve have the same structure, both including a valve body. A solenoid valve is installed inside the valve body, and a cavity is provided inside the valve body. The cavity of the compression control valve and the cavity of the return control valve are connected by a pipe. An oil passage is provided on the valve body. The oil passages of the compression control valve and the return control valve are respectively connected to the compression cavity and the return cavity. Each oil passage is connected to oil passage one and oil passage two. The solenoid valve can adjust the flow rate of oil passage one. Oil passage two is a one-way connection between the cavity and the oil passage. The solenoid valve can control the storage of hydraulic oil in the shock absorber to the oil pump or the return of hydraulic oil in the oil pump to the shock absorber.

[0010] Furthermore, the solenoid valve includes a solenoid valve body and a retractable valve core. The first oil passage is connected to an automatic throttling sleeve. The automatic throttling sleeve is provided with a throttling channel that connects the first oil passage to the cavity. The valve core is inserted into the throttling channel, and the oil flow rate of the first oil passage is controlled by the extension and retraction of the valve core into the throttling channel.

[0011] Furthermore, the valve body is provided with an oil passage assembly, with oil passage one located in the middle of the oil passage assembly and oil passage two located at the edge of the oil passage assembly. A spring plate two is provided on the left side of oil passage two, which is divided into oil passage one and oil passage two through the oil passage assembly. At the same time, the spring plate two can realize one-way oil passage two.

[0012] Furthermore, it also includes a manual adjustment device, which includes an adjustment block threaded to the inner wall of the valve body and a manual throttling tube assembly. The solenoid valve is disposed in the adjustment block. The left side of the adjustment block is fixedly connected to the automatic throttling sleeve. The manual throttling tube assembly includes a manual throttling tube inserted into oil passage one. A spring plate three located on the right side of oil passage one is clamped on the manual throttling tube. A boss is connected to the right side of the manual throttling tube. A sleeve is disposed on the right side of the boss. The left end of the automatic throttling sleeve is slidably connected in the sleeve. A spring two is disposed outside the sleeve. The two ends of the spring two abut against the adjustment block and the boss, respectively. By rotating the adjustment block to compress the spring two, the damping of the shock absorber can be manually preset and adjusted.

[0013] Furthermore, the oil pump includes an oil pump pipe and a gas-liquid isolation block slidably connected inside the oil pump pipe. The gas-liquid isolation block divides the oil pump pipe into an oil storage chamber and an air storage chamber. The oil storage chamber is connected to the cavity of the return control valve. The oil pump is divided into an oil storage chamber and an air storage chamber through the gas-liquid isolation block. The air storage chamber makes the oil circuit switching smoother and reduces the vibration of the shock absorber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention uses a controller in conjunction with a compression control valve and a return flow control valve to adjust the flow rate of oil return and inlet circulation during the operation of the shock absorber. This allows the hydraulic oil in the shock absorber to be stored in the oil pump or the hydraulic oil stored in the oil pump to be replenished to the shock absorber, thus avoiding the instability of the damping effect of the shock absorber due to temperature during operation.

[0016] This invention provides oil circulation through an external oil pump, which facilitates the addition of a cooling device to allow the hydraulic oil to dissipate heat better during circulation, thus preventing the shock absorber from overheating and keeping it at a relatively stable temperature. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of section A;

[0019] Figure 3 for Figure 2 Schematic diagram of section B in the middle.

[0020] In the diagram: 1. Damping valve; 101. Slider; 102. Shock-absorbing piston rod; 103. Damping orifice; 104. Spring plate one; 2. Compression chamber; 3. Return chamber; 4. Compression control valve; 5. Return control valve; 6. Flow meter; 7. Controller; 8. Oil pump; 81. Oil pump pipe; 82. Gas-liquid isolation block; 83. Oil storage chamber; 84. Gas storage chamber; 9. Pipe wall; 10. Spring one; 11. Oil return channel; 12. Upper end cover; 13. Lower end cover; 14. Upper compression oil... 15. Oil return through hole; 16. Valve body; 17. Solenoid valve; 171. Solenoid valve body; 172. Valve core; 18. Oil passage port; 19. Oil passage one; 20. Oil passage two; 21. Automatic throttling sleeve; 22. Throttling channel; 23. Oil passage assembly; 24. Spring plate two; 25. Adjusting block; 26. Manual throttling pipe assembly; 261. Manual throttling pipe; 262. Spring plate three; 263. Boss; 264. Sleeve; 27. Rotating groove; 30. Spring two. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-3 As shown, an automatic oiling device for a front wheel shock absorber of an electric bicycle includes a shock absorber. The shock absorber is divided into a compression chamber 2 and a return chamber 3 by a damping valve 1. The compression chamber 2 and the return chamber 3 are respectively connected to a compression control valve 4 and a return control valve 5 through pipes. The compression control valve 4 is connected to the return control valve 5. A flow meter 6 is installed at the connection between the compression chamber 2 and the compression control valve 4. The flow meter 6 can be an electronic flow meter 6. The compression control valve 4, the return control valve 5 and the flow meter 6 are all electrically connected to a controller 7. The return control valve 5 is connected to an oil pump 8 through a pipe.

[0023] Furthermore, the shock absorber includes a pipe wall 9, a damping valve 1, and a spring 10. The pipe wall 9 is a double-layered cylinder, with the double-layered cylindrical interlayer serving as a return oil channel 11. A return flow control valve connection port is provided on the upper side of the pipe wall 9. The return flow control valve 5 is connected to the return flow control valve connection port via a pipe. The pipe wall 9 is respectively provided with a threaded upper end cap 12 and a lower end cap 13. An L-shaped upper compression oil passage 14 is provided in the upper end cap 12. The flow meter 6 is fixedly installed on the upper end. The lower end cover 13 includes a threaded boss 1 and a threaded boss 2 integrally connected below the threaded boss 1. The threaded boss 1 is threaded to the inner layer of the pipe wall 9, and the side wall of the threaded boss 2 is threaded to the outer layer of the pipe wall 9. The threaded boss 1 has a return oil through hole 15, which is L-shaped, with one end connected to the return oil channel 11 and the other end connected to the return cavity 3. The damping valve 1 includes... A slider 101 is slidably connected to the inner cylindrical wall of the pipe 9, and a shock-absorbing piston rod 102 is connected below the slider 101 and passes through the lower end cover 13, allowing it to slide up and down. The slider 101 has a damping hole 103, the cross-sectional area of ​​which is smaller than that of the return oil through hole 15. A spring plate 104 is positioned below the damping hole 103, and the spring plate 104 is secured to the damping hole 103 by a screw. A boss is located at the upper end of the screw. 263, the diameter of the boss 263 is smaller than the diameter of the spring plate 104. When the slider 101 moves upward, the hydraulic damping hole 103 and the spring plate 104 can be bent and deformed downward. The outer side of the tube wall 9 is threaded, and the outer tube wall 9 is threaded to an upper top platform. A spring 10 is sleeved on the tube wall 9 and the upper end of the spring 10 abuts against the lower side of the upper top platform. The lower end of the shock-absorbing piston rod 102 is fixed to a lower top platform, and the lower end of the spring 10 abuts against the upper side of the lower top platform.

[0024] Furthermore, the compression control valve 4 and the return control valve 5 have the same structure, both including a cylindrical valve body 16. A solenoid valve 17 is installed inside the valve body 16. A cavity is provided inside the valve body 16. The cavity of the compression control valve 4 and the cavity of the return control valve 5 are connected by a connecting pipe. An oil passage 18 is provided on the valve body 16. The oil passages 18 of the compression control valve 4 and the return control valve 5 are respectively connected to the compression chamber 2 and the return chamber 3 through the upper compression oil passage 14 and the return oil through hole 15 on the upper end cover 12 and the lower end cover 13, respectively. Each oil passage 18 is connected to an oil passage 19 and an oil passage 20. The solenoid valve 17 can adjust the flow rate of the oil passage 19. The oil passage 20 is a one-way connection between the cavity and the oil passage 18.

[0025] Furthermore, the solenoid valve 17 includes a solenoid valve body 171 and a retractable valve core 172. The oil passage 19 is connected to an automatic throttling sleeve 21. The automatic throttling sleeve 21 is provided with a throttling channel 22 that connects the oil passage 19 and the cavity. The throttling channel 22 is T-shaped and includes a throttling channel one that vertically connects to the cavity and a throttling channel two that horizontally connects the throttling channel one and the oil passage 19. The diameter of the throttling channel one is larger than the diameter of the valve core 172. A tapered opening is provided on the left side of the throttling channel one. The left end of the valve core 172 is tapered with the same shape as the opening. The valve core 172 is inserted into the throttling channel 22 from the right side of the throttling channel 22.

[0026] Furthermore, an oil passage assembly 23 is provided inside the valve body 16. The first oil passage 19 is opened in the middle of the oil passage assembly 23, and the second oil passage 20 is opened at the edge of the oil passage assembly 23. A spring plate slot is provided on the left side of the second oil passage 20, and a second spring plate 24 is locked in the spring plate slot.

[0027] Furthermore, it also includes a manual adjustment device, which includes an adjustment block 25 threadedly connected to the inner wall of the valve body 16 and a manual throttling tube assembly 26. The left side of the adjustment block 25 is fitted with a solenoid valve pre-reserved slot, and the valve body 16 of the solenoid valve 17 is embedded and fixed in the solenoid valve pre-reserved slot. The bottom of the pre-reserved slot also has a valve core through hole that matches the diameter of the valve core 172. The left side of the adjustment block 25 is fixedly connected to the automatic throttling sleeve 21 by welding. A sealing groove is also formed on the outer left side of the adjustment block 25, and a rubber sealing ring is installed in the sealing groove. The left side of the adjusting block 25 has symmetrically arranged rotating grooves 27. The manual throttle tube assembly 26 includes a manual throttle tube 261 inserted into the oil passage 19. A spring plate 262 located on the right side of the oil passage 19 is clamped on the manual throttle tube 261. A boss 263 is integrally connected to the right side of the manual throttle tube 261. A sleeve 264 is provided on the right side of the boss 263. The left end of the automatic throttle sleeve is slidably connected in the sleeve 264. A spring 30 is sleeved on the sleeve 264. The two ends of the spring 30 abut against the adjusting block 25 and the boss 263, respectively.

[0028] Furthermore, the oil pump 8 includes an oil pump pipe 81 and a gas-liquid isolation block 82 slidably connected to the inner wall of the oil pump pipe 81. The gas-liquid isolation block 82 divides the oil pump pipe 81 into an upper and lower oil storage chamber 83 and a gas storage chamber 84. The oil storage chamber 83 is connected to the cavity pipe of the return control valve 5. The gas-liquid isolation block 82 is slidably connected in the oil pump 8 and sealing rings are provided at both the upper and lower ends on the side wall of the gas-liquid isolation block 82.

[0029] In use, the shock-absorbing piston rod 102 is compressed and moves upward to compress the spring 10, which stores elastic potential energy. Simultaneously, the shock-absorbing piston rod 102 drives the damping valve 1 to move upward. At this time, most of the liquid in the compression chamber moves upward and enters the compression control valve 4, while a small portion passes through the damping hole 103 and pushes the spring plate 104 downward to deform and enter the return chamber 3. The flow rate of the liquid entering the return chamber 3 is measured by the flow meter 6 and uploaded to the controller 7. When the valve core 172 in the compression control valve 4 and the return control valve 5 extends to the same length, the hydraulic oil entering the compression control valve 4 is blocked by the spring plate 24 and can only pass through... Pushing open spring plate 262 or entering the cavity 1 of compression control valve 4 through throttling channel 22, hydraulic oil then enters the cavity of return control valve 5 through pipeline. At this time, because the damping piston rod 102 occupies part of the volume of return cavity 3, part of the hydraulic oil enters the return channel and returns to return cavity 3 through oil passage 19 and throttling channel 22 in return orifice valve, and part enters the oil storage chamber 83 in air pump through pipeline connected to the cavity. At this time, the elastic potential energy of the spring pushes the damping piston rod 102 to move downward. At this time, damping valve 1 moves downward, and spring plate 104 closes damping orifice 103 due to the influence of hydraulic oil. At this time, all the hydraulic oil in return cavity 3 flows back. When the flow control valve 5 is activated, a portion of the hydraulic oil pushes the spring plate 262 inside the return control valve 5 into the cavity, while another portion directly enters the cavity through the throttling channel 22. At this time, the hydraulic oil in the oil pump 8 also merges with the hydraulic oil in the return cavity 3 through the pipeline and enters the compression control valve 4. A portion of the hydraulic oil directly enters the oil passage 19 through the throttling channel 22 inside the compression control valve 4 and returns to the compression cavity 2, while another portion returns to the compression cavity 2 after impacting the spring plate 24 through the oil passage 20 and deforming it, thus completing one damping motion. Each damping motion circulates a portion of the hydraulic oil in the oil pump 8 into the shock absorber to circulate and cool the hydraulic oil inside the shock absorber, maintaining the hydraulic fluid level within the shock absorber. When the hydraulic oil temperature is too high, the volume of hydraulic oil will increase. At this time, the flow rate of hydraulic oil in the compression oil passage 14 will increase. The flow meter 6 will feed back the measured flow rate data that is higher than normal to the controller 7. The controller 7 will control the solenoid valve 17 in the compression control valve 4 to increase the flow rate in the compression control valve 4. The hydraulic oil that has increased due to the volume will be stored in the oil pump 8. Conversely, after the hydraulic oil in the shock absorber cools down, the flow rate of hydraulic oil in the compression oil passage 14 will slow down. The controller 7 will adjust the solenoid valve 17 in the return control valve 5 to increase the flow rate in the return control valve 5. At this time, the hydraulic oil in the oil pump 8 will replenish the shock absorber, realizing automatic oil replenishment.

[0030] Meanwhile, the present invention can use the adjusting block 25 set in the rotary compression control valve 4 and the return control valve 5 to squeeze the spring 20. The elastic potential energy of the spring 20 increases, which will push the manual throttle tube assembly 26 to squeeze the spring plate 3262, thereby reducing the bending angle of the spring plate 3262, reducing the hydraulic oil flow, improving the damping effect, and realizing the manual preset adjustment of the damping of the shock absorber.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric bicycle front wheel shock absorber automatic oiling device, comprising a shock absorber, characterized in that: The shock absorber is divided into a compression chamber and a return chamber by a damping valve. The compression chamber and the return chamber are respectively connected to a compression control valve and a return control valve. The compression control valve is connected to the return control valve. A flow meter is installed at the connection between the compression chamber and the compression control valve. The compression control valve, the return control valve and the flow meter are all connected to a controller. The return control valve is connected to an oil pump. The shock absorber includes a pipe wall, a damping valve, and a spring. The damping valve includes a slider that is slidably connected to the pipe wall and a shock-absorbing piston rod that is connected below the slider and passes through the lower part of the pipe wall. The slider has a damping hole, and a spring plate is provided below the damping hole. The spring is sleeved on the pipe wall, and the upper and lower ends of the spring abut against the pipe wall and the lower end of the shock-absorbing piston rod, respectively. The pipe wall is provided with a return oil channel, the upper end of the return oil channel is connected to a return control valve, and the lower end of the return oil channel is connected to a return chamber. The compression control valve and the return control valve have the same structure, both including a valve body. A solenoid valve is installed inside the valve body. A cavity is provided inside the valve body. The cavity of the compression control valve and the cavity of the return control valve are connected by a pipe. An oil passage is provided on the valve body. The oil passages of the compression control valve and the return control valve are respectively connected to the compression cavity and the return cavity. Each oil passage is connected to oil passage one and oil passage two. The solenoid valve can adjust the flow rate of oil passage one. Oil passage two is a one-way connection between the cavity and the oil passage. The solenoid valve includes a solenoid valve body and a retractable valve core. The first oil passage is connected to an automatic throttling sleeve. The automatic throttling sleeve is provided with a throttling channel that connects the first oil passage to the cavity. The valve core is inserted into the throttling channel. The valve body is provided with an oil passage assembly, the first oil passage is opened in the middle of the oil passage assembly, the second oil passage is opened at the edge of the oil passage assembly, and the second spring plate is provided on the left side of the second oil passage. It also includes a manual adjustment device, which includes an adjustment block threaded to the inner wall of the valve body and a manual throttling tube assembly. The solenoid valve is disposed in the adjustment block. The left side of the adjustment block is fixedly connected to the automatic throttling sleeve. The manual throttling tube assembly includes a manual throttling tube inserted into oil passage one. A spring plate three located on the right side of oil passage one is clamped on the manual throttling tube. A boss is connected to the right side of the manual throttling tube. A sleeve is disposed on the right side of the boss. The left end of the automatic throttling sleeve is slidably connected in the sleeve. A spring two is disposed outside the sleeve. The two ends of the spring two abut against the adjustment block and the boss, respectively.

2. The electric bicycle front wheel shock absorber automatic oiling device according to claim 1, characterized in that: The oil pump includes an oil pump pipe and a gas-liquid isolation block slidably connected inside the oil pump pipe. The gas-liquid isolation block divides the oil pump pipe into an oil storage chamber and a gas storage chamber. The oil storage chamber is connected to the cavity of the reflux control valve.

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