Front shock absorber, electric vehicle front fork and electric vehicle

Abstract

The front shock absorber comprises an outer cylinder and an inner cylinder which is inserted into the outer cylinder and slidably connected with the outer cylinder, a guide shaft is coaxially arranged in the outer cylinder, the guide shaft is inserted into the inner cylinder and slidably connected with the inner cylinder, and a damping spring is arranged in the inner cylinder; the end, facing the outer cylinder, of the damping spring abuts against the guide shaft, the inner cylinder is used for containing hydraulic oil to generate damping acting force, and an oil absorption pad is arranged in the outer cylinder and arranged at the end, away from the inner cylinder, of the outer cylinder. Oil leakage of the shock absorber can be reduced, the cleanliness of the shock absorber is improved, and user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a front shock absorber, an electric vehicle front fork and an electric vehicle. Background Art

[0002] Shock absorbers are used to suppress the shock caused by the rebound of springs after absorbing shock and the impact from the road surface. They are widely used in vehicles, such as electric vehicles and cars, and are usually used to accelerate the attenuation of frame and body vibrations to improve driving smoothness. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road, the spring itself will still have reciprocating motion. If the amplitude is too large, it will easily cause the shock-absorbing spring to break. If the shock absorber is too soft, the body will jump up and down. If the shock absorber is too hard, it will bring too much resistance, hindering the normal operation of the spring. The shock absorber is used to suppress this spring jump to ensure the comfort of the vehicle during the process.

[0003] During operation of the shock absorber in the prior art, lubricating grease may liquefy and flow out from the bottom of the shock absorber. The grease flowing out of the shock absorber may pollute the body of the electric vehicle and affect the user experience. Utility Model Content

[0004] The purpose of the present application is to provide a front shock absorber, an electric vehicle front fork and an electric vehicle, which can reduce shock absorber oil leakage, improve shock absorber cleanliness, and improve user experience.

[0005] The embodiment of the present application is implemented as follows:

[0006] According to one aspect of an embodiment of the present application, a front shock absorber is provided, comprising an outer cylinder, and an inner cylinder inserted in the outer cylinder and slidably connected to the outer cylinder, a guide shaft is coaxially arranged in the outer cylinder, the guide shaft is inserted in the inner cylinder and slidably connected to the inner cylinder, a shock absorbing spring is arranged in the inner cylinder, the shock absorbing spring abuts against the guide shaft at one end facing the outer cylinder, the inner cylinder is used to install hydraulic oil to generate a damping force, an oil absorption pad is arranged in the outer cylinder and the oil absorption pad is arranged at an end away from the inner cylinder.

[0007] Optionally, as an implementable manner, a first seal is provided at one end of the inner cylinder inserted into the outer cylinder, a second seal is provided at the other end of the inner cylinder, a one-way damping valve is provided at one end of the guide shaft extending into the inner cylinder, a first chamber is formed between the one-way damping valve and the first seal, and a second chamber is formed between the one-way damping valve and the second seal, so that when the hydraulic oil flows back from the first chamber to the second chamber, it is subjected to the damping force generated by the one-way damping valve.

[0008] Optionally, as an implementable manner, the shock absorbing spring is arranged in the first chamber, a buffer spring is arranged in the second chamber, and two ends of the buffer spring are respectively connected to the one-way damping valve and the second sealing member.

[0009] Optionally, as an implementable manner, a bottom cover is provided at one end of the outer cylinder away from the inner cylinder, and the guide shaft is mounted on the bottom cover.

[0010] Optionally, as an implementable manner, the guide shaft includes a connecting section and an extending section that are connected to each other, the connecting section is connected to the bottom cover, and the extending section is partially inserted into the inner cylinder.

[0011] Optionally, as an implementable manner, the outer diameter of the connecting section is smaller than the outer diameter of the extending section, a positioning seat is provided on the side of the bottom cover facing the inner cylinder, and the connecting section limit is provided on the positioning seat.

[0012] Optionally, as an implementable manner, a through hole is provided on the bottom cover, a positioning hole is provided on the positioning seat, and the connecting section passes through the positioning hole and the through hole and is connected to the fastening nut.

[0013] Another aspect of an embodiment of the present application provides an electric vehicle front fork, comprising a seat tube, a connecting plate arranged at one end of the seat tube, and a front shock absorber as described in any one of the above items, wherein two of the front shock absorbers are arranged on a side of the connecting plate away from the seat tube, and a space is reserved between the two front shock absorbers for accommodating wheels.

[0014] Optionally, as an implementable manner, a mounting hole is provided on the connecting plate, and the inner tube of the front shock absorber is inserted into the mounting hole.

[0015] An embodiment of the present application also provides an electric vehicle, comprising a frame and an electric vehicle front fork as described in any one of the above.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] The front shock absorber, electric vehicle front fork and electric vehicle provided by the present application include an outer cylinder, and an inner cylinder inserted in the outer cylinder and slidably connected to the outer cylinder, a guide shaft is coaxially arranged in the outer cylinder, the guide shaft is inserted in the inner cylinder and slidably connected to the inner cylinder, a shock-absorbing spring is arranged in the inner cylinder, the shock-absorbing spring is abutted against the guide shaft at one end facing the outer cylinder, the inner cylinder is used to install hydraulic oil to generate a damping force, and the shock-absorbing and buffering effect of the front shock absorber is realized through the cooperation of the shock-absorbing spring and the hydraulic oil in the inner cylinder, an oil absorption pad is arranged in the outer cylinder and the oil absorption pad is arranged at an end away from the inner cylinder, the oil absorption pad absorbs the liquefied lubricating grease, so as to avoid the leakage of the shock absorber lubricating grease, improve the cleanliness of the shock absorber, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the front fork of an electric vehicle provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a front shock absorber in a front fork of an electric vehicle provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a guide shaft in an electric vehicle front fork provided in an embodiment of the present application.

[0022] Icons: 100-electric vehicle front fork; 110-seated pipe; 120-connecting plate; 121-mounting hole; 130-front shock absorber; 131-outer cylinder; 1311-bottom cover; 1312-positioning seat; 132-inner cylinder; 1321-first chamber; 1322-second chamber; 133-guide shaft; 1331-connecting section; 1332-extension section; 134-oil absorption pad; 135-first sealing element; 136-second sealing element; 137-one-way damping valve; 138-shock-absorbing spring; 139-buffer spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3 The present embodiment provides a front shock absorber 130, including an outer cylinder 131, and an inner cylinder 132 inserted in the outer cylinder 131 and slidably connected to the outer cylinder 131, a guide shaft 133 is coaxially arranged in the outer cylinder 131, the guide shaft 133 is inserted in the inner cylinder 132 and slidably connected to the inner cylinder 132, a shock absorbing spring 138 is arranged in the inner cylinder 132, one end of the shock absorbing spring 138 facing the outer cylinder 131 abuts against the guide shaft 133, the inner cylinder 132 is used to install hydraulic oil to generate a damping force, an oil absorption pad 134 is arranged in the outer cylinder 131 and the oil absorption pad 134 is arranged at an end away from the inner cylinder 132.

[0028] Specifically, when assembling the front shock absorber 130 of the present application, a shock absorbing spring 138 and hydraulic oil are arranged in the inner cylinder 132, and then the inner cylinder 132 is plugged into and matched with the outer cylinder 131, so that the guide shaft 133 coaxially arranged with the outer cylinder 131 is plugged into and matched with the inner cylinder 132, and the shock absorbing spring 138 and hydraulic oil in the inner cylinder 132 and the guide shaft 133 inserted into the inner cylinder 132 cooperate to achieve the shock absorbing and buffering effect of the front shock absorber 130, and an oil absorption pad 134 is arranged in the outer cylinder 131, and the oil absorption pad 134 is arranged at an end away from the inner cylinder 132, that is, when the front shock absorber 130 is installed on the electric vehicle, the oil absorption pad 134 is arranged at the bottom of the front shock absorber 130, and the oil absorption pad 134 absorbs the liquefied lubricating grease to avoid leakage of the shock absorber lubricating grease, improve the cleanliness of the shock absorber, and improve the user experience.

[0029] The front shock absorber 130 provided in the present application includes an outer cylinder 131, and an inner cylinder 132 inserted in the outer cylinder 131 and slidably connected to the outer cylinder 131. A guide shaft 133 is coaxially arranged in the outer cylinder 131, and the guide shaft 133 is inserted in the inner cylinder 132 and slidably connected to the inner cylinder 132. A shock-absorbing spring 138 is arranged in the inner cylinder 132, and the end of the shock-absorbing spring 138 facing the outer cylinder 131 abuts against the guide shaft 133. The inner cylinder 132 is used to install hydraulic oil to generate a damping force. The shock-absorbing spring 138 and the hydraulic oil in the inner cylinder 132 cooperate to achieve the shock-absorbing and buffering effect of the front shock absorber 130. An oil absorption pad 134 is arranged in the outer cylinder 131 and the oil absorption pad 134 is arranged at an end away from the inner cylinder 132. The oil absorption pad 134 absorbs the liquefied lubricating grease to avoid leakage of the shock absorber lubricating grease, improve the cleanliness of the shock absorber, and improve the user experience.

[0030] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, a first sealing member 135 is provided at one end of the inner cylinder 132 inserted into the outer cylinder 131, a second sealing member 136 is provided at the other end of the inner cylinder 132, and a one-way damping valve 137 is provided at one end of the guide shaft 133 extending into the inner cylinder 132. A first chamber 1321 is formed between the one-way damping valve 137 and the first sealing member 135, and a second chamber 1322 is formed between the one-way damping valve 137 and the second sealing member 136, so that when the hydraulic oil flows back from the first chamber 1321 to the second chamber 1322, it is subjected to the damping force generated by the one-way damping valve 137.

[0031] Specifically, a first sealing member 135 is provided at one end of the inner cylinder 132 inserted into the outer cylinder 131, and a second sealing member 136 is provided at the other end. A one-way damping valve 137 is provided at one end of the guide shaft 133 extending into the inner cylinder 132. The one-way damping valve 137 is connected to the inner wall piston of the inner cylinder 132. A first chamber 1321 is formed between the one-way damping valve 137 and the first sealing member 135, and a second chamber 1322 is formed between the one-way damping valve 137 and the second sealing member 136. When the inner cylinder 132 and the outer cylinder 131 slide relative to each other, the guide shaft 133 follows the outer cylinder 131 to slide relative to the inner cylinder 132, and also drives the one-way damping valve 137 to slide relative to the inner cylinder 132. The size of the first chamber 1321 and the second chamber 1322 changes accordingly. At this time, the hydraulic oil in the first chamber 1321 and the second chamber 1322 will have relative flow.

[0032] Through the action of the one-way damping valve 137, when the shock-absorbing spring 138 is compressed, the hydraulic oil in the second chamber 1322 can flow smoothly into the first chamber 1321. In the process of the shock-absorbing spring 138 restoring its elastic deformation, the hydraulic oil flows back from the first chamber 1321 to the second chamber 1322 and is affected by the damping force generated by the one-way damping valve 137, thereby suppressing the jumping of the shock-absorbing spring 138 and improving the relative stability of the electric vehicle when driving on bumpy roads.

[0033] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, the shock absorbing spring 138 is arranged in the first chamber 1321, and the buffer spring 139 is arranged in the second chamber 1322, and the one-way damping valve 137 and the second sealing member 136 are respectively connected through the two ends of the buffer spring 139.

[0034] Specifically, the shock absorbing spring 138 and the buffer spring 139 are both compression springs. By providing the buffer spring 139, the buffer spring 139 will be compressed during the process of the shock absorbing spring 138 restoring its elastic deformation. In this way, the jumping of the shock absorbing spring 138 itself can be buffered, so that the process of the shock absorbing spring 138 restoring its elastic deformation is smoother, which is beneficial to ensuring the stability of the vehicle body.

[0035] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, a bottom cover 1311 is provided at one end of the outer cylinder 131 away from the inner cylinder 132 , and the guide shaft 133 is mounted on the bottom cover 1311 .

[0036] Furthermore, the guide shaft 133 includes a connecting section 1331 and an extending section 1332 which are connected to each other. The connecting section 1331 is connected to the bottom cover 1311 , and the extending section 1332 is partially inserted into the inner cylinder 132 .

[0037] Furthermore, the outer diameter of the connecting section 1331 is smaller than the outer diameter of the extending section 1332 , and a positioning seat 1312 is provided on the side of the bottom cover 1311 facing the inner cylinder 132 , and the connecting section 1331 is limitedly disposed on the positioning seat 1312 .

[0038] Furthermore, a through hole is provided on the bottom cover 1311 , a positioning hole is provided on the positioning seat 1312 , and the connecting section 1331 passes through the positioning hole and the through hole and is connected with the fastening nut.

[0039] Specifically, the outer diameter of the connecting section 1331 is smaller than the outer diameter of the extending section 1332, so that the connection between the connecting section 1331 and the extending section 1332 is arranged in a stepped manner, and a positioning seat 1312 is arranged on the bottom cover 1311, and a through hole is arranged on the bottom cover 1311, and a positioning hole is arranged on the positioning seat 1312. When the guide shaft 133 is installed on the outer cylinder 131, the positioning hole and the through hole are passed through one side of the connecting section 1331, and the two matching surfaces of the positioning seat 1312 are respectively in contact with the steps formed by the bottom cover 1311, the connecting section 1331 and the extending section 1332, and the connecting section 1331 is limited and guided by the positioning hole of the positioning seat 1312 to ensure the coaxiality of the guide shaft 133 and the outer cylinder 131 and the inner cylinder 132, so as to ensure that the relative sliding of the guide shaft 133, the outer cylinder 131 and the inner cylinder 132 is smoother.

[0040] When assembling the outer cylinder 131 and the guide shaft 133 of the present application, first install the bottom cover 1311 at one end of the outer cylinder 131, then sequentially place the oil absorption pad 134 and the positioning seat 1312 in the cylinder body of the outer cylinder 131, set the through hole on the bottom cover 1311 and the positioning hole on the positioning seat 1312 concentrically, and then pass the connecting section 1331 of the guide shaft 133 through the positioning hole and the through hole and connect with the fastening nut to complete the connection between the outer cylinder 131 and the guide shaft 133, and the oil absorption pad 134 can be fixed through the connection between the outer cylinder 131 and the guide shaft 133.

[0041] Furthermore, a buffer pad can be provided at one end of the positioning seat 1312 away from the bottom cover 1311, and the buffer pad can be sleeved on the guide shaft 133. When encountering a bumpy road surface and the shock-absorbing spring 138 is rapidly compressed with a large stroke, the inner cylinder 132 can be abutted against the buffer pad to avoid rigid contact between the inner cylinder 132 and the outer cylinder 131. The buffer pad can be made of rubber, which is beneficial to provide the required buffering force, avoid the inner cylinder 132 touching the bottom and colliding with the outer cylinder 131, and help ensure stability during use.

[0042] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, an electric vehicle front fork 100 is provided, comprising a seat tube 110, a connecting plate 120 arranged at one end of the seat tube 110, and a front shock absorber 130 as described above, two front shock absorbers 130 are arranged on the side of the connecting plate 120 away from the seat tube 110, and a space is reserved between the two front shock absorbers 130 for accommodating wheels.

[0043] Specifically, when assembling the electric vehicle front fork 100 of the present application, the vertical tube 110 and the front shock absorber 130 are respectively installed on both sides of the connecting plate 120, the inner tubes 132 of the two front shock absorbers 130 are connected to the connecting plate 120, a space is reserved between the two front shock absorbers 130 to accommodate the wheels, and the outer tubes 131 of the two front shock absorbers 130 are connected to the wheels.

[0044] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, a mounting hole 121 is provided on the connecting plate 120 , and the inner tube 132 of the front shock absorber 130 is inserted into the mounting hole 121 .

[0045] Specifically, two mounting holes 121 are provided on the connecting plate 120, and the two mounting holes 121 are arranged on both sides of the vertical tube 110, and the distance between the two mounting holes 121 and the vertical tube 110 is consistent. When assembling the electric vehicle front fork 100 of the present application, the vertical tube 110 and the front shock absorber 130 are respectively installed on both sides of the connecting plate 120, and the inner tubes 132 of the two front shock absorbers 130 are installed on the mounting holes 121 of the connecting plate 120. A spacing for accommodating the wheels is reserved between the two front shock absorbers 130, and the outer tubes 131 of the two front shock absorbers 130 are connected to the wheels.

[0046] The present application also discloses an electric vehicle, including a frame and the electric vehicle front fork 100 in the above embodiment. The electric vehicle includes the same structure and beneficial effects as the electric vehicle front fork 100 in the above embodiment. The structure and beneficial effects of the electric vehicle front fork 100 have been described in detail in the above embodiment, and will not be repeated here.

[0047] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A front shock absorber, characterized in that: It includes an outer cylinder, and an inner cylinder inserted in the outer cylinder and slidably connected to the outer cylinder, a guide shaft is coaxially arranged in the outer cylinder, the guide shaft is inserted in the inner cylinder and slidably connected to the inner cylinder, a shock-absorbing spring is arranged in the inner cylinder, the shock-absorbing spring is abutted against the guide shaft at one end facing the outer cylinder, the inner cylinder is used to install hydraulic oil to generate a damping force, and an oil absorption pad is arranged in the outer cylinder and the oil absorption pad is arranged at an end away from the inner cylinder.

2. The front shock absorber according to claim 1, characterized in that: A first sealing member is arranged at one end of the inner cylinder inserted into the outer cylinder, a second sealing member is arranged at the other end of the inner cylinder, a one-way damping valve is arranged at one end of the guide shaft extending into the inner cylinder, a first chamber is formed between the one-way damping valve and the first sealing member, and a second chamber is formed between the one-way damping valve and the second sealing member, so that when the hydraulic oil flows back from the first chamber to the second chamber, it is subjected to the damping force generated by the one-way damping valve.

3. The front shock absorber according to claim 2, characterized in that: The shock absorbing spring is arranged in the first chamber, and a buffer spring is arranged in the second chamber. Two ends of the buffer spring are respectively connected to the one-way damping valve and the second sealing member.

4. The front shock absorber according to claim 1, characterized in that: A bottom cover is disposed at one end of the outer cylinder away from the inner cylinder, and the guide shaft is mounted on the bottom cover.

5. The front shock absorber according to claim 4, characterized in that: The guide shaft includes a connecting section and an extending section which are connected to each other, the connecting section is connected to the bottom cover, and the extending section is partially inserted into the inner cylinder.

6. The front shock absorber according to claim 5, characterized in that: The outer diameter of the connecting section is smaller than the outer diameter of the extending section. A positioning seat is arranged on the side of the bottom cover facing the inner cylinder, and the connecting section is limitedly arranged on the positioning seat.

7. The front shock absorber according to claim 6, characterized in that: The bottom cover is provided with a through hole, the positioning seat is provided with a positioning hole, and the connecting section is connected with the fastening nut after passing through the positioning hole and the through hole.

8. An electric vehicle front fork, characterized in that: It comprises a vertical pipe, a connecting plate arranged at one end of the vertical pipe, and the front shock absorber according to any one of claims 1 to 7, wherein two front shock absorbers are arranged on the side of the connecting plate away from the vertical pipe, and a space is reserved between the two front shock absorbers for accommodating wheels.

9. The electric vehicle front fork according to claim 8, characterized in that: The connecting plate is provided with a mounting hole, and the inner tube of the front shock absorber is inserted into the mounting hole.

10. An electric vehicle, characterized in that: The electric vehicle comprises a frame and the front fork of any one of claims 8 to 9.

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