A rear axle damping shock absorber for electric tricycle

Abstract

The present invention discloses a rear axle damping shock absorber for an electric tricycle, comprising a first sleeve and a second sleeve coaxially mounted, wherein the first sleeve comprises an inner tube and an outer tube coaxially fixedly arranged, the inner diameter of the second sleeve is not less than the outer diameter of the inner tube, the outer diameter of the second sleeve is not greater than the inner diameter of the outer tube, a friction sleeve is fixedly arranged on the inner wall of the second sleeve, and the inner wall of the friction sleeve and the outer wall of the inner tube are interference fit. The rear axle damping shock absorber for an electric tricycle effectively reduces internal components, reduces production costs, and effectively avoids the problem of medium oil leakage.

Description

Technical Field

[0001] The invention relates to the technical field of rear axle damping shock absorbers for electric tricycles, in particular to a rear axle damping shock absorber for electric tricycles. Background Art

[0002] In the production process of existing electric vehicles or automobiles, in order to eliminate the riding discomfort caused by excessive shaking of the plate suspension or springs, an electric tricycle rear axle damping shock absorber is added between the carrier frame and the wheel mounting seat to suppress excessive jumping of the plate suspension or springs, thereby eliminating the bumpy feeling of the road and improving the riding comfort.

[0003] Most of the existing shock absorbers use the piston to absorb energy by compressing the medium oil in the piston cylinder, or by setting a damping hole on the piston surface. The friction between the medium oil and the damping hole converts kinetic energy into internal energy to achieve the damping shock absorption effect. Since the medium oil and piston are involved inside, the number of internal components increases, and the processing accuracy of the piston is relatively high. In order to avoid leakage of the medium oil, the oil storage chamber also needs to be sealed, which increases the overall production cost. In addition, during use, due to the aging of the seal of the oil storage chamber, the medium oil will leak, resulting in a decrease in the damping effect and affecting the ride comfort of the vehicle. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a rear axle damping shock absorber for an electric tricycle, which effectively reduces internal components, reduces production costs, and effectively avoids the problem of medium oil leakage, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rear axle damping shock absorber for an electric tricycle, comprising a first sleeve and a second sleeve coaxially mounted, the first sleeve comprising an inner tube and an outer tube coaxially fixedly arranged, the inner diameter of the second sleeve is not less than the outer diameter of the inner tube, the outer diameter of the second sleeve is not greater than the inner diameter of the outer tube, a friction sleeve is fixedly arranged on the inner wall of the second sleeve, and the inner wall of the friction sleeve and the outer wall of the inner tube are interference fit.

[0006] As a preferred technical solution of the present invention, an inwardly contracted constriction opening is provided at one end of the inner tube close to the second sleeve;

[0007] By setting the tie mouth, the outer diameter of the end of the inner tube is effectively reduced, which facilitates the rapid completion of the plug-in connection between the inner tube and the friction sleeve during production and assembly.

[0008] As a preferred technical solution of the present invention, a vent hole is provided at the end of the first sleeve or the second sleeve, and the vent hole communicates with the closed space formed by the first sleeve and the second sleeve;

[0009] When the first sleeve and the second sleeve move relative to each other, the air stored in the inner cavity of the combination of the two will be compressed or expanded. This result will affect the damping force between the first sleeve and the second sleeve. Therefore, air holes are provided so that the gas in the inner cavity of the combination of the two can be exchanged with the outside in time to avoid the gas being compressed or expanded.

[0010] As a preferred technical solution of the present invention, a dustproof sealing ring is fixedly provided on one end of the inner wall of the outer tube close to the second sleeve, and the inner wall of the dustproof sealing ring is slidably and sealingly installed with the outer wall of the second sleeve.

[0011] As a preferred technical solution of the present invention, a dustproof sealing ring is fixedly arranged on one end of the outer wall of the second sleeve close to the first sleeve, and the outer wall of the dustproof sealing ring is slidably sealed with the inner wall of the outer tube;

[0012] The first sleeve uses an outer tube to wrap the inner tube, so that the outer wall of the inner tube is always in a sealed environment, avoiding the mud splashed by the surface during the driving of the vehicle to adhere to the outer wall of the inner tube, thereby ensuring the stability of the friction between the friction sleeve and the outer wall of the inner tube.

[0013] As a preferred technical solution of the present invention, the friction sleeve is arranged at the inner wall of the second sleeve close to one end of the first sleeve, and a stop ring is fixedly arranged on the outer wall of the inner tube close to one end of the second sleeve, and the outer wall of the stop ring is slidably mounted on the inner wall of the second sleeve;

[0014] During production, the first sleeve and the second sleeve are both made of metal. In order to avoid the loss caused by direct friction between the outer wall of the inner tube and the inner wall of the second sleeve, and to reduce the difficulty of assembly during the production process, a large gap is usually left between the outer wall of the inner tube and the inner wall of the second sleeve. This causes a certain angle change between the axes of the two when they move relative to each other, that is, swinging, causing uneven extrusion on the side wall of the friction sleeve, causing excessive wear on one side, and affecting the performance of the product. Therefore, a stop ring is provided on the outside of the bottom of the inner tube to play a supporting role and ensure the coaxiality of the inner tube and the second sleeve during relative movement.

[0015] As a preferred technical solution of the present invention, an annular groove is provided on the inner wall of the second sleeve, the friction sleeve is fixedly installed in the annular groove on the inner wall of the second sleeve, and an annular adjustment groove is provided on the inner wall of the friction sleeve;

[0016] When the length of the friction sleeve is determined, the friction contact area between the friction sleeve and the outer wall of the inner tube can be changed by adjusting the width of the adjustment slot, thereby changing the friction force between the two, that is, changing the actual damping effect of the product.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the rear axle damping shock absorber of the electric tricycle adopts a method of arranging a friction sleeve between the first sleeve and the second sleeve in relative motion, thereby suppressing excessive jumping of the spring or plate suspension by consuming energy through friction, thereby achieving a shock absorbing effect. Compared with traditional shock absorbers, this product removes complex components such as internal pistons, oil storage tanks, and oil seals, reduces the precision required for processing, effectively reduces production costs, and solves the problem of medium oil leakage caused by aging of seals in traditional shock absorbers.

[0018] At the same time, the first sleeve of this product adopts a design that combines inner and outer tubes, so that the friction surface of the inner tube is always in a closed space, effectively reducing the adhesion of stains on the friction surface of the inner wall, avoiding the wear of stains on the friction sleeve and the friction surface of the inner tube, and effectively improving the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a cross-sectional view of the present invention;

[0021] Figure 3 It is a schematic diagram of a second embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of a third embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of a fourth embodiment of the present invention;

[0024] Figure 6 It is an enlarged view of point A of the present invention.

[0025] In the figure: 1 first sleeve, 101 inner tube, 102 outer tube, 103 stop ring, 104 air vent, 2 second sleeve, 201 friction sleeve, 202 adjustment groove, 3 dustproof sealing ring. DETAILED DESCRIPTION

[0026] 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.

[0027] Embodiment 1:

[0028] See also Figure 1-2The present invention provides a technical solution: a rear axle damping shock absorber for an electric tricycle, comprising a first sleeve 1 and a second sleeve 2 coaxially mounted, the first sleeve 1 comprising an inner tube 101 and an outer tube 102 coaxially fixedly arranged, the inner diameter of the second sleeve 2 is not less than the outer diameter of the inner tube 101, the outer diameter of the second sleeve 2 is not greater than the inner diameter of the outer tube 102, a friction sleeve 201 is fixedly arranged on the inner wall of the second sleeve 2, and the inner wall of the friction sleeve 201 and the outer wall of the inner tube 101 are interference fit.

[0029] An inwardly contracted opening is provided at one end of the inner tube 101 close to the second sleeve 2;

[0030] By providing the constriction opening, the outer diameter of the end of the inner tube 101 is effectively reduced, so that the inner tube 101 and the friction sleeve 201 can be quickly connected during production and assembly.

[0031] An air vent 104 is provided at the end of the first sleeve 1 or the second sleeve 2, and the air vent 104 communicates with the closed space formed by the first sleeve 1 and the second sleeve 2;

[0032] When the first sleeve 1 and the second sleeve 2 move relative to each other, the air stored in the inner cavity of the combination of the two will be compressed or expanded, and this result will affect the damping force between the first sleeve 1 and the second sleeve 2. Therefore, the air vent 104 is provided so that the gas in the inner cavity of the combination of the two can be exchanged with the outside in time to avoid the gas being compressed or expanded.

[0033] When the overlapping length of the first sleeve 1 and the second sleeve 2 changes, the actual friction contact area between the inner tube 101 and the friction sleeve 201 changes, that is, the greater the overlap between the two, the greater the friction contact area between the two, and the greater the damping force of the relative motion between the two.

[0034] Embodiment 2:

[0035] See also Figure 3 The present invention provides a technical solution: a rear axle damping shock absorber for an electric tricycle, comprising a first sleeve 1 and a second sleeve 2 coaxially mounted, the first sleeve 1 comprising an inner tube 101 and an outer tube 102 coaxially fixedly arranged, the inner diameter of the second sleeve 2 is not less than the outer diameter of the inner tube 101, the outer diameter of the second sleeve 2 is not greater than the inner diameter of the outer tube 102, a friction sleeve 201 is fixedly arranged on the inner wall of the second sleeve 2, and the inner wall of the friction sleeve 201 and the outer wall of the inner tube 101 are interference fit.

[0036] An inwardly contracted opening is provided at one end of the inner tube 101 close to the second sleeve 2;

[0037] By providing the constriction opening, the outer diameter of the end of the inner tube 101 is effectively reduced, so that the inner tube 101 and the friction sleeve 201 can be quickly connected during production and assembly.

[0038] An air vent 104 is provided at the end of the first sleeve 1 or the second sleeve 2, and the air vent 104 communicates with the closed space formed by the first sleeve 1 and the second sleeve 2;

[0039] When the first sleeve 1 and the second sleeve 2 move relative to each other, the air stored in the inner cavity of the combination of the two will be compressed or expanded, and this result will affect the damping force between the first sleeve 1 and the second sleeve 2. Therefore, the air vent 104 is provided so that the gas in the inner cavity of the combination of the two can be exchanged with the outside in time to avoid the gas being compressed or expanded.

[0040] The friction sleeve 201 is arranged on the inner wall of the second sleeve 2 close to one end of the first sleeve 1, and a stop ring 103 is fixedly arranged on the outer wall of the inner tube 101 close to one end of the second sleeve 2, and the outer wall of the stop ring 103 is slidably mounted on the inner wall of the second sleeve 2;

[0041] During production, the first sleeve 1 and the second sleeve 2 are both made of metal. In order to avoid the loss caused by direct friction between the outer wall of the inner tube 101 and the inner wall of the second sleeve 2, and to reduce the difficulty of assembly during the production process, a large gap is usually left between the outer wall of the inner tube 101 and the inner wall of the second sleeve 2. This causes a certain angle change between the axes of the two when they move relative to each other, that is, swinging, causing uneven squeezing of the side wall of the friction sleeve 201, causing excessive wear on one side, and affecting the performance of the product. Therefore, a stop ring 103 is provided on the outer side of the bottom of the inner tube 101 to play a supporting role and ensure the coaxiality of the inner tube 101 and the second sleeve 2 during relative movement.

[0042] An annular groove is provided on the inner wall of the second sleeve 2, and the friction sleeve 201 is fixedly installed in the annular groove on the inner wall of the second sleeve 2. An annular adjustment groove 202 is provided on the inner wall of the friction sleeve 201;

[0043] When the length of the friction sleeve 201 is determined, the friction contact area between the friction sleeve 201 and the outer wall of the inner tube 101 can be changed by adjusting the width of the adjustment slot 202, thereby changing the friction force between the two, that is, changing the actual damping effect of the product.

[0044] By limiting the length of the friction sleeve 201 , the actual friction contact area between the inner tube 101 and the friction sleeve 201 is not affected by the overlap between the inner tube 101 and the friction sleeve 201 , that is, the damping force of the relative motion is not affected by the overlap length.

[0045] Embodiment three:

[0046] See also Figure 4 and Figure 6The present invention provides a technical solution: a rear axle damping shock absorber for an electric tricycle, comprising a first sleeve 1 and a second sleeve 2 coaxially mounted, the first sleeve 1 comprising an inner tube 101 and an outer tube 102 coaxially fixedly arranged, the inner diameter of the second sleeve 2 is not less than the outer diameter of the inner tube 101, the outer diameter of the second sleeve 2 is not greater than the inner diameter of the outer tube 102, a friction sleeve 201 is fixedly arranged on the inner wall of the second sleeve 2, and the inner wall of the friction sleeve 201 and the outer wall of the inner tube 101 are interference fit.

[0047] An inwardly contracted opening is provided at one end of the inner tube 101 close to the second sleeve 2;

[0048] By providing the constriction opening, the outer diameter of the end of the inner tube 101 is effectively reduced, so that the inner tube 101 and the friction sleeve 201 can be quickly connected during production and assembly.

[0049] An air vent 104 is provided at the end of the first sleeve 1 or the second sleeve 2, and the air vent 104 communicates with the closed space formed by the first sleeve 1 and the second sleeve 2;

[0050] When the first sleeve 1 and the second sleeve 2 move relative to each other, the air stored in the inner cavity of the combination of the two will be compressed or expanded, and this result will affect the damping force between the first sleeve 1 and the second sleeve 2. Therefore, the air vent 104 is provided so that the gas in the inner cavity of the combination of the two can be exchanged with the outside in time to avoid the gas being compressed or expanded.

[0051] A dustproof sealing ring 3 is fixedly provided on one end of the inner wall of the outer tube 102 close to the second sleeve 2 , and the inner wall of the dustproof sealing ring 3 is slidably and sealedly installed with the outer wall of the second sleeve 2 .

[0052] The first sleeve 1 uses an outer tube 102 to wrap the inner tube 101, so that the outer wall of the inner tube 101 is always in a sealed environment, avoiding mud splashed during the driving of the vehicle on the surface from adhering to the outer wall of the inner tube 101, thereby ensuring the stability of the friction between the friction sleeve 201 and the outer wall of the inner tube 101.

[0053] The friction sleeve 201 is arranged on the inner wall of the second sleeve 2 close to one end of the first sleeve 1, and a stop ring 103 is fixedly arranged on the outer wall of the inner tube 101 close to one end of the second sleeve 2, and the outer wall of the stop ring 103 is slidably mounted on the inner wall of the second sleeve 2;

[0054] During production, the first sleeve 1 and the second sleeve 2 are both made of metal. In order to avoid the loss caused by direct friction between the outer wall of the inner tube 101 and the inner wall of the second sleeve 2, and to reduce the difficulty of assembly during the production process, a large gap is usually left between the outer wall of the inner tube 101 and the inner wall of the second sleeve 2. This causes a certain angle change between the axes of the two when they move relative to each other, that is, swinging, causing uneven squeezing of the side wall of the friction sleeve 201, causing excessive wear on one side, and affecting the performance of the product. Therefore, a stop ring 103 is provided on the outer side of the bottom of the inner tube 101 to play a supporting role and ensure the coaxiality of the inner tube 101 and the second sleeve 2 during relative movement.

[0055] An annular groove is provided on the inner wall of the second sleeve 2, and the friction sleeve 201 is fixedly installed in the annular groove on the inner wall of the second sleeve 2. An annular adjustment groove 202 is provided on the inner wall of the friction sleeve 201;

[0056] When the length of the friction sleeve 201 is determined, the friction contact area between the friction sleeve 201 and the outer wall of the inner tube 101 can be changed by adjusting the width of the adjustment slot 202, thereby changing the friction force between the two, that is, changing the actual damping effect of the product.

[0057] Embodiment 4:

[0058] See also Figure 5-6 The present invention provides a technical solution: a rear axle damping shock absorber for an electric tricycle, comprising a first sleeve 1 and a second sleeve 2 coaxially mounted, the first sleeve 1 comprising an inner tube 101 and an outer tube 102 coaxially fixedly arranged, the inner diameter of the second sleeve 2 is not less than the outer diameter of the inner tube 101, the outer diameter of the second sleeve 2 is not greater than the inner diameter of the outer tube 102, a friction sleeve 201 is fixedly arranged on the inner wall of the second sleeve 2, and the inner wall of the friction sleeve 201 and the outer wall of the inner tube 101 are interference fit.

[0059] An inwardly contracted opening is provided at one end of the inner tube 101 close to the second sleeve 2;

[0060] By providing the constriction opening, the outer diameter of the end of the inner tube 101 is effectively reduced, so that the inner tube 101 and the friction sleeve 201 can be quickly connected during production and assembly.

[0061] An air vent 104 is provided at the end of the first sleeve 1 or the second sleeve 2, and the air vent 104 communicates with the closed space formed by the first sleeve 1 and the second sleeve 2;

[0062] When the first sleeve 1 and the second sleeve 2 move relative to each other, the air stored in the inner cavity of the combination of the two will be compressed or expanded, and this result will affect the damping force between the first sleeve 1 and the second sleeve 2. Therefore, the air vent 104 is provided so that the gas in the inner cavity of the combination of the two can be exchanged with the outside in time to avoid the gas being compressed or expanded.

[0063] A dustproof sealing ring 3 is fixedly arranged on one end of the outer wall of the second sleeve 2 close to the first sleeve 1, and the outer wall of the dustproof sealing ring 3 is slidably and sealedly installed with the inner wall of the outer tube 102;

[0064] The first sleeve 1 uses an outer tube 102 to wrap the inner tube 101, so that the outer wall of the inner tube 101 is always in a sealed environment, avoiding mud splashed during the driving of the vehicle on the surface from adhering to the outer wall of the inner tube 101, thereby ensuring the stability of the friction between the friction sleeve 201 and the outer wall of the inner tube 101.

[0065] The friction sleeve 201 is arranged on the inner wall of the second sleeve 2 close to one end of the first sleeve 1, and a stop ring 103 is fixedly arranged on the outer wall of the inner tube 101 close to one end of the second sleeve 2, and the outer wall of the stop ring 103 is slidably mounted on the inner wall of the second sleeve 2;

[0066] During production, the first sleeve 1 and the second sleeve 2 are both made of metal. In order to avoid the loss caused by direct friction between the outer wall of the inner tube 101 and the inner wall of the second sleeve 2, and to reduce the difficulty of assembly during the production process, a large gap is usually left between the outer wall of the inner tube 101 and the inner wall of the second sleeve 2. This causes a certain angle change between the axes of the two when they move relative to each other, that is, swinging, causing uneven squeezing of the side wall of the friction sleeve 201, causing excessive wear on one side, and affecting the performance of the product. Therefore, a stop ring 103 is provided on the outer side of the bottom of the inner tube 101 to play a supporting role and ensure the coaxiality of the inner tube 101 and the second sleeve 2 during relative movement.

[0067] An annular groove is provided on the inner wall of the second sleeve 2, and the friction sleeve 201 is fixedly installed in the annular groove on the inner wall of the second sleeve 2. An annular adjustment groove 202 is provided on the inner wall of the friction sleeve 201;

[0068] When the length of the friction sleeve 201 is determined, the friction contact area between the friction sleeve 201 and the outer wall of the inner tube 101 can be changed by adjusting the width of the adjustment slot 202, thereby changing the friction force between the two, that is, changing the actual damping effect of the product.

[0069] During the design, the friction sleeve 201 is made of silicone foam material, which has good friction performance. During the design, the inner diameter of the friction sleeve 201 is designed according to the damping force required in the actual scene. The smaller the inner diameter, the greater the friction resistance between the friction sleeve 201 and the outer wall of the inner tube 101. At the same time, adjusting the axial length of the friction sleeve 201, that is, adjusting the friction contact area, can also adjust the friction resistance to meet the use requirements of various scenes and reduce the design difficulty.

[0070] During production or use, the friction contact area is adjusted by adjusting the width of the adjustment groove 202, thereby adjusting the damping force of the product. The specific method is: first, the first sleeve 1 and the second sleeve 2 are separated, and then the friction sleeve 201 and the second sleeve 2 are fixed, and the width of the adjustment groove 202 is widened by removing the raw material, thereby reducing the friction contact surface, and then the first sleeve 1 and the second sleeve 2 are reassembled.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rear axle damping shock absorber for an electric tricycle, comprising a first sleeve (1) and a second sleeve (2) coaxially mounted, characterized in that: The first sleeve (1) comprises an inner tube (101) and an outer tube (102) which are coaxially fixedly arranged; the inner diameter of the second sleeve (2) is not less than the outer diameter of the inner tube (101); the outer diameter of the second sleeve (2) is not greater than the inner diameter of the outer tube (102); a friction sleeve (201) is fixedly arranged on the inner wall of the second sleeve (2); an inner wall of the friction sleeve (201) and an outer wall of the inner tube (101) are in interference fit; the friction sleeve (201) is arranged on the second sleeve A stop ring (103) is fixedly arranged on the inner wall of the inner tube (2) near one end of the first sleeve (1); a stop ring (103) is fixedly arranged on the outer wall of the inner tube (101) near one end of the second sleeve (2); the outer wall of the stop ring (103) is slidably mounted on the inner wall of the second sleeve (2); an annular groove is arranged on the inner wall of the second sleeve (2); the friction sleeve (201) is fixedly mounted in the annular groove on the inner wall of the second sleeve (2); and an annular adjustment groove (202) is arranged on the inner wall of the friction sleeve (201).

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