Electric vehicle front fork shock absorber

Abstract

The invention discloses a shock absorber for an electric vehicle front fork, belonging to the technical field of electric vehicle front forks, comprising: an outer cylinder, which is in the shape of a cylinder with an opening at one end, an oil seal is installed inside the open end of the outer cylinder, and hydraulic oil is arranged inside the outer cylinder; an inner cylinder, which is slidably installed inside the outer cylinder; a support rod, which is a hollow structure, which connects the internal space of the outer cylinder and the internal space of the inner cylinder to each other, and the inner diameter of the support rod will produce a corresponding change during buffering, thereby reducing the flow rate of the hydraulic oil flowing through the inside of the support rod; a buffer part, which is installed below the inner cylinder; wherein, during buffering, the inner cylinder slides toward the inside of the outer cylinder, the buffer part is elastically deformed under pressure, and presses against the support rod to deform the support rod and adjust the flow rate of the hydraulic oil inside the support rod. The invention changes the inner diameter of the support rod by pressing the buffer part against the support rod, thereby limiting the flow rate of the hydraulic oil and achieving the buffering effect.

Description

Technical Field

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

[0002] In the design of electric vehicles, the front fork shock absorber is a key component, which directly affects the vehicle's driving stability and riding comfort. Traditional electric vehicle front fork shock absorbers often use simple hydraulic and spring structures to achieve shock absorption effects.

[0003] At present, the hydraulic shock absorbing structure realizes shock absorption by limiting the flow rate of hydraulic oil into the inner tube. The method of limiting the flow rate often reduces the flow rate of hydraulic oil by flowing through small holes. However, small holes are often easily clogged, thereby affecting the shock absorption effect. In order to solve the above problems, the present invention provides an electric vehicle front fork shock absorber. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a front fork shock absorber for an electric vehicle, which changes the inner diameter of the support rod by pressing the buffer part against the support rod, thereby limiting the flow of hydraulic oil and achieving a buffering effect.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides an electric vehicle front fork shock absorber, comprising:

[0006] An outer cylinder, wherein the outer cylinder is in the shape of a cylinder with one end open, an oil seal is installed inside the open end of the outer cylinder, and hydraulic oil is provided inside the outer cylinder;

[0007] An inner cylinder, the inner cylinder being slidably mounted inside the outer cylinder;

[0008] A support rod, wherein the support rod is a hollow structure and connects the inner space of the outer cylinder and the inner space of the inner cylinder to each other;

[0009] A buffer portion, the buffer portion being installed below the inner tube;

[0010] When the inner tube slides toward the inside of the outer tube and is in a buffering state, the buffering part is compressed to produce elastic deformation and press against the support rod, causing the support rod to deform and adjust the flow of hydraulic oil inside the support rod.

[0011] Preferably, the support rod comprises:

[0012] A shaft seat, the shaft seat is connected to the outer cylinder, and a plurality of through openings are formed on the shaft seat;

[0013] A connecting shaft, wherein the connecting shaft and the inner cylinder are connected to each other;

[0014] An adjusting part, wherein the adjusting part is located between the shaft seat and the connecting shaft, and two ends of the adjusting part are fixedly connected to the shaft seat and the connecting shaft respectively;

[0015] During buffering, the buffering portion is deformed and pressed against the adjusting portion, so that the inner diameter of the adjusting portion changes accordingly.

[0016] Preferably, the adjusting unit comprises:

[0017] An elastic tube, one end of which is fixedly connected to the shaft seat, and the other end of which is fixedly connected to the connecting shaft;

[0018] A plurality of spring sheets, one end of which is fixedly connected to the shaft seat, and the other end of which is fixedly connected to the connecting shaft, and the plurality of spring sheets are evenly distributed on the outside of the elastic tube along the circumferential direction of the elastic tube.

[0019] Preferably, the buffer portion includes a plurality of arch rods, which are evenly distributed on the inner annular surface of the outer tube along the circumference of the outer tube, the arch foot at the upper end of the arch rod is fixedly connected to the lower end surface of the inner tube, the arch foot at the lower end of the arch rod is a floating end and is interconnected with the outer tube, and the arch top of the arch rod presses against the corresponding spring sheet under the action of its own elastic force.

[0020] Preferably, the arch foot at the lower end of the arch rod is fixedly connected with an inner lining ring, the outer ring surface of the inner lining ring is tightly fitted with the inner ring surface of the outer tube, the inner ring surface of the inner lining ring is fitted with the outer ring surface of the shaft seat, and the through-hole is located below the inner lining ring.

[0021] Preferably, a thread groove is formed on the lower end surface of the shaft seat, and a bolt matching the thread groove is installed on the outer cylinder.

[0022] Preferably, the connecting shaft passes through the inner cylinder and extends into the cavity inside the inner cylinder, and a spring is connected between the connecting shaft and the inner side surface of the upper end of the cavity inside the inner cylinder. The connecting shaft is in the shape of a stepped shaft, and the diameter of the connecting shaft at one end inside the inner cylinder is larger than the diameter at one end outside the inner cylinder.

[0023] The beneficial effects of the present invention are:

[0024] The present invention realizes that the buffer part applies a pressing force to the adjusting part during buffering by setting the buffer part and the adjusting part, so that the adjusting part produces corresponding deformation and reduces the flow of hydraulic oil flowing through the inside of the support rod, thereby better consuming the energy absorbed during buffering and improving the buffering effect.

[0025] The present invention realizes that during buffering, the buffer part will produce corresponding deformation and drive the inner lining ring to descend, so that the buffer part can press against the position of the adjusting part. During the buffering process, the position where the adjusting part is pressed against will change from top to bottom. When the pressed position changes from top to bottom, it counteracts the oil flowing upward inside the support rod, thereby further improving the buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a front fork shock absorber for an electric vehicle provided in an embodiment of the present invention.

[0028] Figure 2 It is a cross-sectional view of the present invention.

[0029] Figure 3 For the present invention Figure 2 Enlarged view of point A.

[0030] Figure 4 It is a schematic diagram of the assembly of the support rod and the buffer part of the present invention.

[0031] Figure 5 It is an exploded view of the shaft seat, elastic tube, spring sheet and connecting shaft of the present invention.

[0032] Description of reference numerals:

[0033] 1. Outer tube, 2. Inner tube, 3. Support rod, 301. Shaft seat, 302. Connecting shaft, 303. Through-hole, 304. Shrapnel, 305. Elastic tube, 4. Buffer part, 401. Arch rod, 5. Inner lining ring, 6. Spring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides a front fork shock absorber for an electric vehicle, such as Figures 1 to 5 shown.

[0036] Embodiment 1:

[0037] A front fork shock absorber for an electric vehicle comprises an outer cylinder 1, which is shaped like a cylinder with one end open, the closed end of the outer cylinder 1 is connected to the wheel axle, the open end of the outer cylinder 1 is provided with a sink groove, an oil seal is installed inside the sink groove, hydraulic oil is provided inside the outer cylinder 1, an inner cylinder 2 is coaxially sleeved inside the outer cylinder 1, the inner cylinder 2 can slide back and forth inside the outer cylinder 1 along the axial direction of the outer cylinder 1, a support rod 3 is installed between the lower end of the inner cylinder 2 and the outer cylinder 1, the support rod 3 connects the internal space of the outer cylinder 1 with the internal space of the inner cylinder 2, and the hydraulic oil flows between the inner cylinder 2 and the outer cylinder 1 through the support rod 3 during buffering.

[0038] A buffer portion 4 is provided below the inner cylinder 2. During buffering, the inner cylinder 2 will first slide toward the inside of the outer cylinder 1. The buffer portion 4 will be elastically deformed under pressure, thereby generating a pressing force on the support rod 3, reducing the inner diameter of the support rod 3, and then reducing the flow rate of the hydraulic oil flowing through the support rod 3, thereby better consuming the energy absorbed during buffering and achieving an auxiliary buffering effect.

[0039] After the inner cylinder 2 slides into the outer cylinder 1, the inner cylinder 2 will slide to the outside of the outer cylinder 1. At this time, the buffer part 4 no longer presses against the support rod 3, the inner diameter of the support rod 3 is restored, and the flow rate of the hydraulic oil flowing through the support rod 3 will increase, so that the inner cylinder 2 can be smoothly reset.

[0040] Through the above-mentioned setting, it is possible to limit the flow of hydraulic oil during the buffering process without setting a small aperture, thereby achieving an auxiliary buffering effect and avoiding the buffering effect being affected by clogging of the small aperture.

[0041] Moreover, in the process of descending, because the contact position between the buffer part 4 and the support rod 3 is also continuously descending, it will counteract the hydraulic oil flowing upward inside the support rod 3, which can further improve the buffering effect.

[0042] Embodiment 2:

[0043] On the basis of Example 1, the support rod 3 includes an axle seat 301, which is connected to a bolt installed on the outer cylinder 1. A threaded groove is provided at the lower end of the axle seat 301, and a screw hole matching the threaded groove is provided on the closed end of the outer cylinder 1. During installation, the bolt is passed through the screw hole on the outer cylinder 1 and engaged with the threaded groove on the axle seat 301, so that the axle seat 301 and the outer cylinder 1 can be connected together. A plurality of through openings 303 are provided on the axle seat 301.

[0044] The upper end of the shaft seat 301 is connected to the connecting shaft 302 through the adjusting part. The connecting shaft 302 is a stepped shaft, and the upper end of the connecting shaft 302 passes through the inner cylinder 2 and extends into the cavity inside the inner cylinder 2. A spring 6 is connected between the connecting shaft 302 and the inner side surface of the upper end of the cavity inside the inner cylinder 2. The setting of the spring 6 can further play a buffering effect. The connecting shaft 302 is in the shape of a stepped shaft, and the diameter of the connecting shaft 302 at one end inside the inner cylinder 2 is larger than the diameter at one end outside the inner cylinder 2, which can prevent the connecting shaft 302 from being disconnected from the inner cylinder 2.

[0045] During the movement of the inner cylinder 2 toward the interior of the outer cylinder 1, the hydraulic oil inside the outer cylinder 1 will enter the interior of the inner cylinder 2 through the through-port 303, the shaft seat 301, the adjustment portion and the connecting shaft 302 in sequence, and during the movement of the inner cylinder 2 toward the outside of the outer cylinder 1, the hydraulic oil inside the inner cylinder 2 will flow back to the interior of the outer cylinder 1 in the reverse direction according to the above-mentioned flow direction.

[0046] When the hydraulic oil flows into the inner tube 2, the regulating part is pressed by the buffer part 4 so that the inner diameter of the regulating part becomes smaller, thereby reducing the flow rate of the hydraulic oil into the inner tube 2. By limiting the flow rate of the hydraulic oil, the energy absorbed during buffering is consumed, thereby improving the buffering effect.

[0047] The adjusting part includes an elastic tube 305, one end of the elastic tube 305 is fixedly connected to the shaft seat 301, and the other end is fixedly connected to the connecting shaft 302. The material of the elastic tube 305 is elastic rubber and can produce elastic deformation. The outer side of the elastic tube 305 is fixedly connected to a plurality of spring pieces 304, one end of the spring piece 304 is fixedly connected to the shaft seat 301, and the other end is fixedly connected to the connecting shaft 302. The plurality of spring pieces 304 are evenly distributed along the circumference of the elastic tube 305.

[0048] The buffer portion 4 includes a plurality of arch rods 401, which are evenly distributed on the inner ring surface of the outer tube 1 along the circumference of the outer tube 1, the arch foot at the upper end of the arch rod 401 is fixedly connected to the lower end surface of the inner tube 2, and the arch foot at the lower end of the arch rod 401 is fixedly connected to the inner lining ring 5, the outer ring surface of the inner lining ring 5 is tightly fitted with the inner ring surface of the outer tube 1, the inner ring surface of the inner lining ring 5 is fitted with the outer ring surface of the shaft seat 301, and the through-port 303 is located below the inner lining ring 5.

[0049] When the inner cylinder 2 slides toward the inside of the outer cylinder 1, the inner liner ring 5 is supported by the hydraulic oil below it, and the arch rod 401 will first deform and press against the corresponding spring piece 304, causing the spring piece 304 to bend toward the axial direction of the shaft seat 301, thereby making the inner diameter of the elastic tube 305 smaller. As the hydraulic oil flows toward the inside of the shaft seat 301, the inner liner ring 5 will gradually descend. During the descent, the position where the arch rod 401 presses against the spring piece 304 will also gradually descend, that is, the position where the inner diameter of the elastic tube 305 decreases will gradually descend. During the descent, the arch rod 401 will counteract the hydraulic oil flowing upward inside the elastic tube 305, and when the position where the arch rod 401 presses against the spring piece 304 gradually approaches the end position of the spring piece 304, the deformation force required by the spring piece 304 will be greater, thereby further consuming the absorbed energy and improving the shock absorption effect.

[0050] When the inner cylinder 2 slides toward the outside of the outer cylinder 1, the arch rod 401 will first be deformed and no longer press against the spring piece 304. At this time, the inner diameter of the elastic tube 305 will recover, and then the arch rod 401 will pull the inner lining ring 5 to move upward. Since the inner diameter of the elastic tube 305 recovers and becomes larger first, the flow rate of the hydraulic oil flowing into the outer cylinder 1 is greater than the flow rate of the hydraulic oil flowing into the inner cylinder 2, so that the inner cylinder 2 can be quickly reset, the stability of the vehicle body can be restored more quickly, and the risk of loss of control can be reduced. Rapid reset can reduce the stay time of the vehicle body in up and down bumps, so that the rider can adapt to changes in road conditions more quickly, improve passing efficiency, and also help the rider better control the direction and speed of the vehicle, and improve the controllability and safety under complex road conditions.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An electric vehicle front fork shock absorber, characterized in that: include: The outer cylinder is in the shape of a cylinder with one end open, an oil seal is installed inside the open end of the outer cylinder, and hydraulic oil is provided inside the outer cylinder; An inner cylinder, which is slidably mounted inside the outer cylinder; A support rod, which is a hollow structure, connects the inner space of the outer cylinder and the inner space of the inner cylinder to each other; A buffer part, which is installed below the inner tube; When the inner cylinder slides toward the inner part of the outer cylinder and is in a buffering state, the buffering part is compressed to produce elastic deformation and press against the support rod, causing the support rod to deform and adjust the flow of hydraulic oil inside the support rod; The support rod includes: The shaft seat is connected to the outer cylinder, and a plurality of through openings are formed on the shaft seat; A connecting shaft, wherein the connecting shaft and the inner cylinder are connected to each other; The adjusting part is located between the shaft seat and the connecting shaft, and the two ends of the adjusting part are fixedly connected to the shaft seat and the connecting shaft respectively; During buffering, the buffering portion deforms and presses against the adjusting portion, causing the inner diameter of the adjusting portion to change accordingly. The regulation department includes: An elastic tube, one end of which is fixedly connected to the shaft seat, and the other end of which is fixedly connected to the connecting shaft; A plurality of spring sheets, one end of which is fixedly connected to the shaft seat, and the other end of which is fixedly connected to the connecting shaft, and the plurality of spring sheets are evenly distributed on the outside of the elastic tube along the circumferential direction of the elastic tube; The buffer part includes a plurality of arched rods, which are evenly distributed on the inner annular surface of the outer tube along the circumference of the outer tube, the arched feet at the upper ends of the arched rods are fixedly connected to the lower end surface of the inner tube, the arched feet at the lower ends of the arched rods are floating ends and are connected to the outer tube, and the arched tops of the arched rods press against the corresponding spring sheets under the action of their own elastic force; The arch foot at the lower end of the arch rod is fixedly connected with an inner lining ring, the outer ring surface of the inner lining ring is tightly fitted with the inner ring surface of the outer tube, the inner ring surface of the inner lining ring is fitted with the outer ring surface of the shaft seat, and the through-hole is located below the inner lining ring.

2. An electric vehicle front fork shock absorber as claimed in claim 1, characterized in that: The lower end surface of the shaft seat is provided with a thread groove, and a bolt matched with the thread groove is installed on the outer cylinder.

3. An electric vehicle front fork shock absorber as claimed in claim 1, characterized in that: The connecting shaft passes through the inner cylinder and extends into the cavity inside the inner cylinder, and a spring is connected between the connecting shaft and the inner side surface of the upper end of the cavity inside the inner cylinder. The connecting shaft is in the shape of a stepped shaft, and the diameter of the connecting shaft at one end inside the inner cylinder is larger than the diameter at one end outside the inner cylinder.

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