Electric vehicle front fork shock absorber

Abstract

The present application relates to the technical field of electric vehicle structures, and in particular to an electric vehicle front fork shock absorber, comprising a front fork frame, a shock absorber rod connected to the front fork frame, and a shock absorber tube sleeved on the outside of the shock absorber rod, wherein a dust ring is provided at the end of the shock absorber tube, and a plurality of dust-proof protrusions are provided on the inner wall of the dust ring along the axial direction, and an accommodating ring groove is provided between the dust-proof protrusions, and the shock absorber tube has a protrusion that radially keeps the dust-proof protrusion against the outer wall of the shock absorber rod. The present application has the following effects: during the movement of the shock absorber rod, firstly, the plurality of dust-proof protrusions can play a multiple sealing effect, reducing the possibility of impurities entering, and at the same time, during use, since the protrusion has a supporting force in the radial direction, it provides additional resisting support force, thereby improving the overall sealing effect, being able to block impurities and the like, and improving the sealing performance.

Description

Technical Field

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

[0002] In order to improve the overall passability of vehicles on the road, a corresponding shock absorber structure will be set. The shock absorber on the front fork of the electric vehicle is generally a hydraulic damping shock absorber. The hydraulic damping shock absorber is usually equipped with a shock absorber rod. In order to better seal the hydraulic oil, a sealing rubber ring is often provided.

[0003] When electric vehicles use hydraulic damping shock absorption devices, part of the shock absorber rod often slides back and forth with the shock absorber, and part of it will be directly exposed to the outside. During road driving, dust or impurities will remain on the surface of the shock absorber rod. When the shock absorber rod and the sealing plug slide, the sealing rubber ring may be scratched or damaged, causing hydraulic oil leakage and affecting the performance of the shock absorber. Summary of the Invention

[0004] In order to improve the sealing durability of the dust ring, the present application provides an electric vehicle front fork shock absorber.

[0005] The present application provides an electric vehicle front fork shock absorber, which adopts the following technical solution: an electric vehicle front fork shock absorber, comprising a front fork frame, a shock absorber rod connected to the front fork frame, and a shock absorber tube sleeved on the outside of the shock absorber rod, characterized in that a dust ring is provided at the end of the shock absorber tube, a plurality of dust-proof protrusions are axially provided on the inner wall of the dust ring, and an accommodating annular grooves are provided between the dust-proof protrusions, and the shock absorber tube has a protrusion that radially keeps the dust-proof protrusion in contact with the outer wall of the shock absorber rod.

[0006] By adopting the above technical solution, during the movement of the shock absorber rod, the multiple dust-proof protrusions can first have a multiple sealing effect, reducing the possibility of impurities entering. At the same time, during use, since the protrusions have a supporting force in the radial direction, they provide additional resistance support force, thereby improving the overall sealing effect, being able to block impurities and the like from the outside, and improving the sealing performance.

[0007] Preferably, the end of the shock-absorbing cylinder has a mounting groove for the dust ring to be embedded in, the protrusion is annular and is located on the inner wall of the mounting groove, and the protrusion corresponds to the dust-proof protrusion one-to-one and is located on the same horizontal plane.

[0008] By adopting the above technical solution, a single protrusion corresponds to the dust-proof protrusion, so that when multiple dust-proof protrusions are subjected to hanging and removing operations, they can be independent of each other, thereby reducing the overall impact.

[0009] Preferably, a rigid ring piece is provided inside the dustproof ring, the inner side of the rigid ring piece is close to the dustproof protrusion, and the outer side of the rigid ring piece is close to the protrusion.

[0010] By adopting the above technical solution, the rigid ring piece forms a better transmission effect, and in the overall sealing effect, the dust-proof protrusion can be kept almost unchanged in the middle position relative to the shock-absorbing rod.

[0011] Preferably, the bottom of the accommodating ring groove is uniformly distributed with suction channels along the circumferential direction, and the shock-absorbing cylinder is provided with an air channel for extracting air toward the suction channels.

[0012] By adopting the above technical solution, when impurities remain in the accommodating ring groove, the impurities originally located inside can be sucked out by means of air extraction.

[0013] Preferably, the dustproof ring is connected with an adsorption rod, and the adsorption rod is inserted into and passes through each rigid ring piece and is located in the air duct.

[0014] By adopting the above technical solution, when impurities are sucked out, they will be adhered to the adsorption rod, so that the impurities will not move freely. During maintenance, the adsorption rod can be taken out.

[0015] Preferably, the bottom of the shock absorber cylinder has an exhaust chamber, the end of the shock absorber rod has an exhaust block located in the exhaust chamber, and the portion below the exhaust block is connected to the air duct.

[0016] By adopting the above technical solution, the gas in the air chamber will flow during the operation of the shock absorber itself, and impurities will be sucked out during the flow. However, due to the presence of the adsorption rod, there will be no backflow.

[0017] Preferably, a limiting frame is provided at the upper end of the installation groove, one end of the adsorption rod is axially limited to the limiting frame, and the limiting frame is limited to the upper side of the dust ring.

[0018] By adopting the above technical solution, the limiting frame can limit the position of the dust ring itself, so that the whole has a relatively fixed position.

[0019] Preferably, one end of the adsorption rod is radially movable on the limiting frame.

[0020] By adopting the above technical solution, for some impurities that are difficult to remove at one time, the dust-proof protrusions can be removed multiple times, allowing the first few dust-proof protrusions to move in the radial direction, thereby requiring a certain amount of follow-up space.

[0021] To sum up, the present application includes at least one of the following beneficial technical effects: during the movement of the shock absorber rod, first of all, multiple dust-proof protrusions can play a multiple sealing effect, reducing the possibility of impurities entering. At the same time, during use, since the protrusions have radial support force, additional resistance support force is provided, which improves the overall sealing effect, can block impurities and the like from the outside, and improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of this application;

[0023] Figure 2 It is a schematic diagram of the connection relationship between the shock absorber cylinder and the shock absorber rod;

[0024] Figure 3 yes Figure 2 A magnified schematic diagram of part A in FIG;

[0025] Figure 4 This is a schematic diagram of the structure of the dust ring from a top-down perspective;

[0026] Figure 5 It is the main flow direction of the gas in the dustproof ring during vacuuming;

[0027] Figure 6 It is the main flow direction of the gas in the dust seal during exhaust.

[0028] Explanation of the accompanying reference numerals: 100, front fork frame; 110, shock absorber cylinder; 120, shock absorber rod; 121, dust ring; 122, mounting groove; 123, dust-proof protrusion; 124, accommodating ring groove; 125, protrusion; 126, exhaust chamber; 127, exhaust block; 130, shock absorber spring; 131, rigid ring plate; 132, suction channel; 133, air channel; 140, adsorption rod; 141, liquid flow pipe; 150, limit frame; 151, sliding block. Implementation Method

[0029] The present application is further described in detail below with reference to the accompanying drawings.

[0030] The embodiment of the present application discloses a shock absorber for a front fork of an electric vehicle, referring to Figure 1 、 Figure 2 The front fork frame 100 includes a shock absorber rod 120 connected to the front fork frame 100, a shock absorber cylinder 110 sleeved on the shock absorber rod 120, and a dust ring 121 is provided at the end of the shock absorber cylinder 110. A corresponding shock absorber spring 130 is provided between the shock absorber rod 120 and the shock absorber cylinder 110.

[0031] In order to install the dust ring 121, an installation groove 122 is provided at the end of the shock absorber cylinder 110 for the dust ring 121 to be embedded. A plurality of dust-proof protrusions 123 are axially arranged on the inner wall of the dust ring 121, and an accommodating annular groove 124 is provided between the dust-proof protrusions 123. The shock absorber cylinder 110 has a protrusion 125 that radially keeps the dust-proof protrusions 123 in contact with the outer wall of the shock absorber rod 120.

[0032] The raised portion 125 and the dust-proof protrusion 123 correspond horizontally one to one. A rigid ring piece 131 is located inside the dust-proof ring 121. The inner side of the rigid ring piece 131 is close to the dust-proof protrusion 123, and the outer side is close to the raised portion 125. The three are on the same horizontal plane. The rigid ring piece 131 can effectively transmit the squeezing force of the raised portion 125 to the dust-proof protrusion 123. At the same time, there is a gap between the rigid ring piece 131 and the dust-proof protrusion 123 on both sides of the radial direction, which is suitable for a certain deformation force.

[0033] Reference Figure 2 、 Figure 3 Suction channels 132 are evenly distributed along the circumference of the bottom of the accommodating annular groove 124. The shock absorber cylinder 110 is provided with an air channel 133 for extracting air from the suction channels 132. The bottom of the shock absorber cylinder 110 has an exhaust chamber 126. The end of the shock absorber rod 120 has an exhaust block 127 located within the exhaust chamber 126. The portion above the exhaust block 127 is connected to the air channel 133. When the shock absorber rod 120 is compressed downward, negative pressure is generated in the upper portion, allowing impurities in the accommodating annular groove 124 to be removed through the suction channels 132.

[0034] To absorb impurities, an adsorption rod 140 is inserted into the dust ring 121. The adsorption rod 140 is inserted into and passes through each rigid ring piece 131 and is located in the air channel 133. Impurities are attracted to the adsorption rod 140 under the influence of the suction channel 132. At the same time, when the shock absorber rod 120 rebounds, the impurities are attracted to the adsorption rod 140 and cannot escape. It is worth noting that during the downward pressure process, the negative pressure itself can also help new impurities enter the accommodating ring groove 124, reducing the possibility of impurities entering the shock absorber cylinder 110.

[0035] The upper end of the mounting groove 122 is provided with a limit frame 150, one end of the adsorption rod 140 is axially limited to the limit frame 150, and one end of the adsorption rod 140 is radially movable on the limit frame 150. The limit frame 150 is limited to the upper side of the dust ring 121. One function of the limit frame 150 is to limit the dust ring 121, and another function is to axially limit the adsorption rod 140, but it allows the adsorption rod 140 to move radially. In this embodiment, a sliding block 151 is provided on the limit frame 150 to slide radially, and the adsorption rod 140 is detachably connected to the sliding block 151 by bolts.

[0036] Reference Figure 4When the dust-proof protrusions 123 encounter impurities that are difficult to scrape off, multiple dust-proof protrusions 123 can be used to scrape them off. Simultaneously, the dust-proof protrusions 123 will drive the rigid ring piece 131 to move, and the adsorption rod 140 needs to move radially. The rigid ring piece 131 is actually a plurality of arc-shaped pieces, corresponding to the adsorption rod 140. That is, in the circumferential direction, some of the rigid ring pieces 131 can move radially without causing interference. The multiple rigid ring pieces 131 are embedded in the rubber dust ring 121, and will eventually return to their original annular shape under the action of the rubber.

[0037] Reference Figure 5 、 Figure 6 At the same time, in order to ensure a good adsorption effect, the outer diameter of the adsorption rod 140 is equal to the inner diameter of the airway 133, and the impurities will be adsorbed inside the adsorption rod 140. At the same time, the end of the airway 133 close to the limit frame 150 is open, so that the adsorption rod 140 can be easily removed. It is worth noting that the upper end of the airway 133 is open, and the extension direction of the adsorption rod 140 itself is perpendicular to the suction channel 132. The effect achieved in this way is that when the air is pumped out, the impurities in the suction channel 132 can be adsorbed on the adsorption rod 140, and when the reverse movement is performed, the flow of gas is mainly discharged toward the upper end of the airway 133, which has almost no effect on the accommodating ring groove 124, achieving a certain one-way valve effect.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A front fork shock absorber for an electric vehicle, comprising a front fork frame (100), a shock absorbing rod (120) connected to the front fork frame (100), and a shock absorbing tube (110) sleeved on the outside of the shock absorbing rod (120), characterized in that: The end of the shock-absorbing cylinder (110) is provided with a dustproof ring (121), the inner wall of the dustproof ring (121) is provided with a plurality of dustproof protrusions (123) along the axial direction, and an accommodating annular groove (124) is provided between the dustproof protrusions (123). The shock-absorbing cylinder (110) has a protrusion (125) that radially keeps the dustproof protrusions (123) in contact with the outer wall of the shock-absorbing rod (120); The end of the shock-absorbing cylinder (110) has a mounting groove (122) for the dustproof ring (121) to be embedded, the protrusion (125) is annular and is located on the inner wall of the mounting groove (122), and the protrusion (125) corresponds to the dustproof protrusion (123) one by one and is located on the same horizontal plane; A rigid ring piece (131) is provided inside the dustproof ring (121), the inner side of the rigid ring piece (131) is close to the dustproof protrusion (123), and the outer side of the rigid ring piece (131) is close to the protrusion (125); The bottom of the accommodating annular groove (124) is uniformly distributed with suction holes (132) along the circumferential direction, and the shock-absorbing cylinder (110) is provided with an air channel (133) for extracting air toward the suction holes (132); The dustproof ring (121) is plugged with an adsorption rod (140), and the adsorption rod (140) is plugged into and passes through each rigid ring piece (131) and is located in the air passage (133); The bottom of the shock-absorbing cylinder (110) is provided with an exhaust chamber (126), the end of the shock-absorbing rod (120) is provided with an exhaust block (127) located in the exhaust chamber (126), and the portion below the exhaust block (127) is connected to the air channel (133).

2. The electric vehicle front fork shock absorber according to claim 1, characterized in that: The upper end of the mounting groove (122) is provided with a limiting frame (150), one end of the adsorption rod (140) is axially limited on the limiting frame (150), and the limiting frame (150) is abutted and limited on the upper side of the dustproof ring (121).

3. The electric vehicle front fork shock absorber according to claim 2, characterized in that: One end of the adsorption rod (140) is arranged on the limiting frame (150) in a radially movable manner.

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