CN219263065U

CN219263065U - Hydraulic damping shock absorber for rear fork of electric vehicle

Info

Publication number: CN219263065U
Application number: CN202320071716.5U
Authority: CN
Inventors: 裴文军
Original assignee: Yangzhong Xinghong Vehicle Parts Co ltd
Current assignee: Yangzhong Xinghong Vehicle Parts Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-06-27
Anticipated expiration: 2033-01-09

Abstract

The utility model discloses a rear fork hydraulic damping shock absorber of an electric vehicle, which relates to the technical field of shock absorbers and comprises a piston rod assembly and a cylinder barrel, wherein the piston rod assembly is movably sleeved with the cylinder barrel, damping springs are sleeved outside the piston rod assembly and the cylinder barrel, an upper limit seat is fixedly connected to the top of the cylinder barrel, an upper lifting lug is fixedly connected to the upper surface of the upper limit seat, a lower limit seat is fixedly connected to the bottom of the piston rod assembly, and a lower lifting lug is fixedly connected to the lower surface of the lower limit seat.

Description

Hydraulic damping shock absorber for rear fork of electric vehicle

Technical Field

The utility model relates to the technical field of shock absorbers, in particular to a rear fork hydraulic damping shock absorber of an electric vehicle.

Background

The shock absorber is used for inhibiting the shock of the spring during rebound after shock absorption and the impact from the road surface. The damping device is widely used for automobiles, electric vehicles and motorcycles, and is used for accelerating the damping of the vibration of the frames and the vehicle bodies so as to improve the running smoothness of the automobiles. While the shock absorbing spring can filter the shock of road surface when passing over uneven road surface, the spring itself can reciprocate, and the shock absorber is used to restrain the spring from jumping.

For example, chinese patent document CN207421199U discloses a rear shock absorber and an electric bicycle, which describes that "the rear shock absorber includes an upper rod, a lower rod, and a buffer device; one end of the buffer device is connected with the upper rod, and the other end of the buffer device is connected with the lower rod, so that buffer can be formed between the upper rod and the lower rod. The electric bicycle comprises two rear shock absorbers arranged below the rear seat, and the rear shock absorbers and the electric bicycle provided by the utility model are connected with the saddle through the upper rod and the lower rod by the buffer device arranged between the upper rod and the lower rod, so that the shock absorption of the saddle can be realized through the buffer device when the wheel jolts, and the comfort of a rider is further improved.

The following drawbacks or problems remain in connection with the prior art: 1. the traditional partial rear shock absorber only depends on an external shock absorption spring to absorb shock, so that the defect of poor shock absorption effect exists, the hydraulic damping shock absorber is used immediately, and internal damping cannot be adjusted according to the use condition, so that the shock absorption effect is poor. 2. At present, technical requirements of electric vehicle shock absorbers on the market are continuously reduced so as to achieve cost control, plastic materials of abrasion parts are not few, the shock absorbers are worn quickly in the use process, so that the shock absorbers lose efficacy, and meanwhile, even iron-based powder parts (general design materials) are used under high-strength use conditions, in a simulated vibration test, the shock absorbers are broken, damaged and the like almost frequently in a tensile test.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a hydraulic damping shock absorber for a rear fork of an electric vehicle.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an electric motor car rear fork hydraulic damping bumper shock absorber, includes piston rod subassembly, cylinder, piston rod subassembly and cylinder activity cup joint, piston rod subassembly has all cup jointed damping spring with the outside of cylinder, the top fixedly connected with of cylinder goes up spacing seat, the upper surface fixedly connected with of last spacing seat goes up the lug, the bottom fixedly connected with of piston rod subassembly is spacing seat down, the lower surface fixedly connected with of spacing seat down the lug down;

the piston rod assembly comprises a piston rod, the upper portion outer wall of piston rod has cup jointed the oil blanket, the outer wall of piston rod has cup jointed the guide holder, the guide holder is located the top of oil blanket, the outer wall of piston rod has cup jointed the buffer spring who is located the guide holder top, the outer wall of piston rod has cup jointed the supporting seat, the supporting seat is located buffer spring's top, the outer wall of piston rod has cup jointed the shell fragment that is located the supporting seat top, the outer wall of piston rod has cup jointed the valve block that is located the shell fragment top, the piston has cup jointed the piston at the top of valve block, the top outer wall threaded connection of piston rod has fixation nut.

Preferably, the bottom of piston rod is equipped with the external screw thread, lower spacing seat and lower lug all seted up with piston rod assorted internal thread hole, piston rod and spacing seat down, lower lug threaded connection down, the bottom threaded connection of piston rod has stop nut, stop nut is located the top of spacing seat down.

Preferably, the supporting seat is made of cold heading iron piece material.

Preferably, the inner wall of the guide seat is provided with an O-shaped ring in a sleeved mode, and the O-shaped ring is in mutual sleeved connection with the outer wall of the piston rod.

Preferably, the right side wall of the fixing nut and the left side wall of the piston are in contact with each other.

The beneficial effects of the utility model are as follows:

1. in the utility model, the upper end of the cylinder barrel is pressed, and the damping spring stretches and dampens; when the vibration is large, the vibration frequency can be changed through the combined action of the expansion and contraction of the buffer spring and the buffer spring, so that the damping effect is improved; the degree that the elastic sheet covers the valve hole on the valve sheet is adjusted through the degree of deformation of the elastic sheet under pressure, so that the damping is adjusted, and the damping effect is better.

2. According to the utility model, the iron-based powder piece manufactured by the traditional powder metallurgy process is changed into the cold forging iron piece processed by the cold forging process, and compared with the iron-based powder piece, the cold forging iron piece has larger stress, when the outer diameter of the traditional support seat is 8.9mm and the inner diameter of the traditional support seat is 6mm, the bearing stress of the traditional support seat is 1KN, and the bearing stress of the traditional support seat is 15KN after improvement, so that the stress design parameter is increased, the safety fatigue times are ensured, and the service life is prolonged.

3. According to the utility model, the fixing nut is used for fixing the piston, so that the assembly is facilitated, and the defect that the piston is easy to damage due to direct riveting can be overcome.

4. According to the utility model, through the design that the piston rod is in threaded connection with the lower limit seat and the lower lifting lug, when the damping spring is rusted and needs to be replaced, the limit nut is loosened through the gap of the damping spring, so that the limit nut moves upwards, the limit on the lower limit seat and the lower lifting lug is eliminated, and then the lower limit seat and the lower lifting lug are unscrewed from the piston rod, so that the damping spring is convenient to replace.

Drawings

Fig. 1 is a front view of a hydraulic damping shock absorber for a rear fork of an electric vehicle according to the present utility model.

Fig. 2 is a front view of a piston rod assembly of an electric vehicle rear fork hydraulic damping shock absorber of the present utility model.

Fig. 3 is a schematic structural view of a piston rod assembly of a rear fork hydraulic damping shock absorber of an electric vehicle according to the present utility model.

Fig. 4 is a schematic structural view of a piston rod of a rear fork hydraulic damping shock absorber of an electric vehicle according to the present utility model.

Reference numerals in the drawings: 1. a piston rod assembly; 2. a cylinder; 3. a damping spring; 4. an upper lifting lug; 5. an upper limit seat; 6. a lower limit seat; 7. a lower lifting lug; 8. a limit nut; 101. a piston rod; 102. an oil seal; 103. a guide seat; 104. a buffer spring; 105. a support base; 106. a spring plate; 107. a valve plate; 108. a piston; 109. a fixing nut; 1010. an O-ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples:

as shown in fig. 1 to 4:

the utility model provides an electric motor car rear fork hydraulic damping bumper shock absorber, includes piston rod subassembly 1, cylinder 2, and piston rod subassembly 1 and cylinder 2 activity cup joint, and piston rod subassembly 1 has all cup jointed damping spring 3 with the outside of cylinder 2, and the top fixedly connected with of cylinder 2 goes up spacing seat 5, and the upper surface fixedly connected with of last spacing seat 5 goes up lug 4, and the bottom fixedly connected with of piston rod subassembly 1 is spacing seat 6 down, and the lower surface fixedly connected with of spacing seat 6 down lug 7 down;

the piston rod assembly 1 includes piston rod 101, the oil blanket 102 has been cup jointed to the upper portion outer wall of piston rod 101, the guide holder 103 has been cup jointed to the outer wall of piston rod 101, the guide holder 103 is located the top of oil blanket 102, the buffer spring 104 that is located the guide holder 103 top has been cup jointed to the outer wall of piston rod 101, the supporting seat 105 is located the top of buffer spring 104, the shell fragment 106 that is located the supporting seat 105 top has been cup jointed to the outer wall of piston rod 101, the valve block 107 that is located the shell fragment 106 top has been cup jointed to the outer wall of piston rod 101, piston 108 is located the top of valve block 107, the top outer wall threaded connection of piston rod 101 has fixation nut 109.

Through the technical scheme, when the electric vehicle runs, the upper end of the cylinder barrel 2 is pressed, and the damping spring 3 stretches and damps; when the vibration is large, the vibration frequency can be changed and the vibration reduction effect can be improved through the combined action of the expansion and contraction of the buffer spring 104 and the damping spring 3; the degree that the elastic sheet 106 covers the valve hole on the valve sheet 107 is adjusted through the degree of compression deformation of the elastic sheet 106, so that the damping size is adjusted, and the damping effect is better.

As shown in fig. 1 to 2, an external thread is arranged at the bottom of a piston rod 101, internal thread holes matched with the piston rod 101 are respectively formed in the lower limit seat 6 and the lower lifting lug 7, the piston rod 101 is in threaded connection with the lower limit seat 6 and the lower lifting lug 7, a limit nut 8 is in threaded connection with the bottom of the piston rod 101, and the limit nut 8 is located above the lower limit seat 6.

Through above-mentioned technical scheme, when damping spring 3 rust needs to be changed, loosen stop nut 8 through damping spring 3's gap, make stop nut 8 upwards move to remove the restriction to lower spacing seat 6, lower lug 7, then will lower spacing seat 6, lower lug 7 unscrew from piston rod 101, conveniently change damping spring 3.

Specifically, the support base 105 is made of cold heading iron.

Through the above technical scheme, the iron-based powder piece manufactured by the traditional powder metallurgy process is changed into the cold-forging iron piece processed by the cold-forging process, and compared with the iron-based powder piece, the cold-forging iron piece has larger stress, when the outer diameter is 8.9mm and the inner diameter is 6mm, the stress born by the traditional support base 105 is 1KN, and the stress born by the improved support base 105 is 15KN, so that the stress design parameter is increased, the safety fatigue times are ensured, and the service life is prolonged.

As shown in fig. 3, an O-ring 1010 is sleeved on the inner wall of the guide seat 103, and the O-ring 1010 is sleeved with the outer wall of the piston rod 101.

Through the above technical scheme, the O-ring 1010 can improve the tightness of the guide seat 103 and prevent oil from flowing out from the gap between the guide seat 103 and the piston rod 101.

As shown in fig. 3, the right side wall of the fixing nut 109 and the left side wall of the piston 108 are in contact with each other.

Through the technical scheme, the fixing of the piston 108 is completed through the fixing nut 109, so that the assembly is facilitated, and the defect that the piston 108 is easy to damage due to direct riveting can be overcome.

Specific use and action of the embodiment:

when the electric vehicle runs, the upper end of the cylinder barrel 2 is pressed, and the damping spring 3 stretches and damps; when the vibration is large, the vibration frequency can be changed and the vibration reduction effect can be improved through the combined action of the expansion and contraction of the buffer spring 104 and the damping spring 3; the degree of covering the valve hole on the valve plate 107 by the elastic sheet 106 is adjusted by the degree of compression deformation of the elastic sheet 106, so that the damping is adjusted, and the damping effect is better;

the fixing of the piston 108 is completed through the fixing nut 109, so that the assembly is facilitated, and the defect that the piston 108 is easy to damage due to direct riveting can be overcome; the supporting seat 105 is changed from an iron-based powder piece manufactured by a traditional powder metallurgy process to a cold forging iron piece processed by a cold forging process, and compared with the iron-based powder piece, the cold forging iron piece has larger stress, the traditional supporting seat 105 has the stress of 1KN when the outer diameter is 8.9mm and the inner diameter is 6mm, and the stress of 15KN after improvement, so that the stress design parameter is increased, the safety fatigue times are ensured, and the service life is prolonged; the O-shaped ring 1010 can improve the tightness of the guide seat 103 and prevent oil from flowing out of a gap between the guide seat 103 and the piston rod 101;

when the damping spring 3 rusts and needs to be replaced, the limiting nut 8 is loosened through the gap of the damping spring 3, so that the limiting nut 8 moves upwards, the limitation on the lower limiting seat 6 and the lower lifting lug 7 is relieved, and then the lower limiting seat 6 and the lower lifting lug 7 are unscrewed from the piston rod 101, so that the damping spring 3 is convenient to replace.

The above structure and process are shown in fig. 1-4.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

Claims

1. The utility model provides an electric motor car rear fork hydraulic damping bumper shock absorber, includes piston rod subassembly (1), cylinder (2), its characterized in that, piston rod subassembly (1) cup joints with the activity of cylinder (2), damping spring (3) have all been cup jointed to the outside of piston rod subassembly (1) and cylinder (2), the top fixedly connected with of cylinder (2) goes up spacing seat (5), the upper surface fixedly connected with of last spacing seat (5) goes up lug (4), the bottom fixedly connected with of piston rod subassembly (1) is spacing seat (6) down, the lower surface fixedly connected with of spacing seat (6) down lug (7);

piston rod subassembly (1) includes piston rod (101), oil blanket (102) have been cup jointed to the upper portion outer wall of piston rod (101), guide holder (103) have been cup jointed to the outer wall of piston rod (101), guide holder (103) are located the top of oil blanket (102), buffer spring (104) that are located guide holder (103) top have been cup jointed to the outer wall of piston rod (101), supporting seat (105) are located the top of buffer spring (104), shell fragment (106) that are located supporting seat (105) top have been cup jointed to the outer wall of piston rod (101), valve block (107) that are located shell fragment (106) top have been cup jointed to the outer wall of piston rod (101), piston (108) are located the top of valve block (107), top outer wall threaded connection of piston rod (101) has fixation nut (109).

2. The electric vehicle rear fork hydraulic damping shock absorber according to claim 1, wherein the bottom of the piston rod (101) is provided with external threads, the lower limit seat (6) and the lower lifting lug (7) are provided with internal thread holes matched with the piston rod (101), the piston rod (101) is in threaded connection with the lower limit seat (6) and the lower lifting lug (7), the bottom of the piston rod (101) is in threaded connection with a limit nut (8), and the limit nut (8) is located above the lower limit seat (6).

3. The electric vehicle rear fork hydraulic damping shock absorber according to claim 1, wherein the support base (105) is a cold heading iron material.

4. The electric vehicle rear fork hydraulic damping shock absorber according to claim 1, wherein an O-shaped ring (1010) is sleeved on the inner wall of the guide seat (103), and the O-shaped ring (1010) is sleeved with the outer wall of the piston rod (101).

5. The electric vehicle rear fork hydraulic damping shock absorber according to claim 1, wherein the right side wall of the fixing nut (109) and the left side wall of the piston (108) are in contact with each other.