CN213323523U - Rear axle damping shock absorber of electric tricycle - Google Patents
Rear axle damping shock absorber of electric tricycle Download PDFInfo
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- CN213323523U CN213323523U CN202021350962.7U CN202021350962U CN213323523U CN 213323523 U CN213323523 U CN 213323523U CN 202021350962 U CN202021350962 U CN 202021350962U CN 213323523 U CN213323523 U CN 213323523U
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Abstract
The utility model discloses an electric tricycle rear axle damping bumper shock absorber, first sleeve and second sleeve including coaxial suit, first sleeve includes inner tube and the outer tube of coaxial fixed setting, the telescopic internal diameter of second is not less than the external diameter of inner tube, the telescopic external diameter of second is not more than the internal diameter of outer tube, the fixed friction sleeve that sets up of second telescopic inner wall, be interference fit between the outer wall of friction sleeve's inner wall and inner tube, originally, this electric tricycle rear axle damping bumper shock absorber effectively reduces the inner assembly, reduces manufacturing cost, and effectively avoids the problem of medium oil leakage.
Description
Technical Field
The utility model relates to an electric tricycle rear axle damping bumper shock absorber technical field specifically is an electric tricycle rear axle damping bumper shock absorber.
Background
In the production process of the existing electric vehicle or automobile, in order to eliminate the uncomfortable riding feeling caused by excessive swinging of the plate suspension or the spring, an electric tricycle rear axle damping shock absorber is added between the bearing frame and the wheel mounting seat to inhibit excessive jumping of the plate suspension or the spring, so that the riding comfort is improved while the road bumping feeling is eliminated.
Most of the existing shock absorbers adopt compression energy absorption of a piston to medium oil in a piston cylinder, or a damping hole is formed in the surface of the piston, friction between the medium oil and the damping hole is utilized, kinetic energy is converted into internal energy, damping shock absorption effect is achieved, medium oil and the piston are involved inside, the number of internal components is increased, the machining precision of the piston is high, medium oil leakage is avoided, the oil storage cavity needs to be sealed similarly, integral production cost is increased, the shock absorber is used, and the medium oil leakage problem can occur due to the fact that a sealing element of the oil storage cavity is aged, damping effect is reduced, and the comfort level of taking a vehicle is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide an electric tricycle rear axle damping bumper shock absorber, effectively reduce the inside subassembly, reduce manufacturing cost, and effectively avoid the problem of medium oil leakage, can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an electric tricycle rear axle damping bumper shock absorber, includes the first sleeve and the second sleeve of coaxial suit, first sleeve is including the inner tube and the outer tube of coaxial fixed setting, the telescopic internal diameter of second is not less than the external diameter of inner tube, the telescopic external diameter of second is not more than the internal diameter of outer tube, the telescopic inner wall of second is fixed and is set up the friction sleeve, be interference fit between the telescopic inner wall of friction and the outer wall of inner tube.
As a preferred technical scheme of the utility model, one end of the inner tube close to the second sleeve is provided with a binding opening which contracts inwards;
through setting up the bundle mouth, effectively reduce the external diameter of inner tube tip, be convenient for accomplish inner tube and friction sleeve's grafting fast when production assembly.
As a preferred technical solution of the present invention, the end of the first sleeve or the second sleeve is provided with a vent hole, and the vent hole communicates with a closed space formed by the first sleeve and the second sleeve;
when the first sleeve and the second sleeve move relatively, air stored in the inner cavity combined with the first sleeve and the second sleeve can be compressed or amplified, the damping force between the first sleeve and the second sleeve can be influenced as a result, and therefore the air holes are formed, so that the air in the inner cavity combined with the first sleeve and the second sleeve can be exchanged with the outside in time, and the air is prevented from being compressed or amplified.
As a preferred technical scheme of the utility model, the outer tube inner wall is close to the fixed dustproof sealing ring that sets up of telescopic one end of second, the inner wall of dustproof sealing ring and the outer wall sliding seal installation of second sleeve.
As a preferred technical scheme of the utility model, one end of the outer wall of the second sleeve, which is close to the first sleeve, is fixedly provided with a dustproof sealing ring, and the outer wall of the dustproof sealing ring and the inner wall of the outer tube are installed in a sliding and sealing way;
the first sleeve wraps the inner pipe by the outer pipe, so that the outer wall of the inner pipe is always in a sealed environment, mud splashed during the running process of a surface vehicle is prevented from being attached to the outer wall of the inner pipe, and the friction force between the friction sleeve and the outer wall of the inner pipe is guaranteed to be stable.
As a preferred technical solution of the present invention, the friction sleeve is disposed at the inner wall of the second sleeve near one end of the first sleeve, the outer wall of the inner tube near one end of the second sleeve is fixedly provided with a stop ring, and the outer wall of the stop ring is slidably mounted with the inner wall of the second sleeve;
in production, first sleeve and second sleeve all adopt the metal to make, the loss that the direct inner wall direct friction that causes with the second sleeve of outer wall for avoiding the inner tube caused, simultaneously for the assembly degree of difficulty in the reduction production process, can leave great space between the inner wall of the outer wall of inner tube and second sleeve usually, this just causes the two when relative motion, certain contained angle change can exist in the axis of the two, produce promptly and sway, cause inhomogeneous extrusion to the friction sleeve lateral wall, arouse the excessive wearing and tearing of unilateral, influence the performance of product, therefore, set up the retaining ring in the bottom outside of inner tube, play the effect of support, guarantee the relative motion in-process, inner tube and the telescopic axiality of second.
As a preferred technical solution of the present invention, the inner wall of the second sleeve is provided with an annular groove, the friction sleeve is fixedly mounted in the annular groove of the inner wall of the second sleeve, and the inner wall of the friction sleeve is provided with an annular adjustment groove;
under the condition that the length of the friction sleeve is determined, the friction contact area between the friction sleeve and the outer wall of the inner pipe can be changed by adjusting the width of the adjusting groove, so that the friction force between the friction sleeve and the outer wall of the inner pipe is changed, namely the actual damping effect of a product is changed.
Compared with the prior art, the beneficial effects of the utility model are that: this electric tricycle rear axle damping bumper shock absorber adopts the mode that sets up the friction sleeve between relative motion's first sleeve and second sleeve, the mode of consuming energy through the friction suppresses the excessive jump that spring or board hung, play absorbing effect, for traditional bumper shock absorber, inside piston has been removed to this product, the oil storage bin, complicated subassemblies such as oil blanket, reduce the required precision of processing, effectively reduce manufacturing cost, the medium oil leakage problem that traditional bumper shock absorber caused because the sealing member is ageing has been solved simultaneously.
Meanwhile, the first sleeve of the product adopts the design of combining the inner pipe and the outer pipe, so that the friction surface of the inner pipe is always positioned in a closed space, the stain adhesion of the friction surface of the inner wall is effectively reduced, the abrasion of the stain on the friction sleeve and the friction surface of the inner pipe is avoided, and the service life of the product is effectively prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view of the present invention;
FIG. 3 is a schematic view of a second embodiment of the present invention;
FIG. 4 is a schematic view of a third embodiment of the present invention;
fig. 5 is a schematic view of a fourth embodiment of the present invention;
fig. 6 is an enlarged view of the position a of the present invention.
In the figure: 1 a first sleeve, 101 an inner tube, 102 an outer tube, 103 a stop ring, 104 a breather hole, 2 a second sleeve, 201 a friction sleeve, 202 an adjusting groove and 3 a dustproof sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-2, the present invention provides a technical solution: the utility model provides an electric tricycle rear axle damping bumper shock absorber, includes first sleeve 1 and the second sleeve 2 of coaxial suit, and first sleeve 1 is including inner tube 101 and the outer tube 102 of coaxial fixed setting, and the internal diameter of second sleeve 2 is not less than the external diameter of inner tube 101, and the external diameter of second sleeve 2 is not more than the internal diameter of outer tube 102, and the inner wall of second sleeve 2 is fixed to be set up friction sleeve 201, is interference fit between the inner wall of friction sleeve 201 and the outer wall of inner tube 101.
One end of the inner pipe 101 close to the second sleeve 2 is provided with a beam opening which is contracted inwards;
through setting up the bundle mouth, effectively reduce the external diameter of inner tube 101 tip, be convenient for accomplish the grafting of inner tube 101 and friction sleeve 201 fast when the production assembly.
The end part of the first sleeve 1 or the second sleeve 2 is provided with a vent hole 104, and the vent hole 104 is communicated with a closed space formed by the first sleeve 1 and the second sleeve 2;
when the first sleeve 1 and the second sleeve 2 move relatively, air stored in the inner cavity combined by the first sleeve 1 and the second sleeve 2 can be compressed or amplified, and the damping force between the first sleeve 1 and the second sleeve 2 can be affected as a result, so that the air holes 104 are formed, so that the air in the inner cavity combined by the first sleeve and the second sleeve can be exchanged with the outside in time, and the air is prevented from being compressed or amplified.
When the overlapping length of the first sleeve 1 and the second sleeve 2 is changed, the actual friction contact area of the inner tube 101 and the friction sleeve 201 is changed, i.e. the larger the overlapping degree of the two is, the larger the friction contact area of the two is, and the larger the damping force of the two in relative motion is.
Example two:
referring to fig. 3, the present invention provides a technical solution: the utility model provides an electric tricycle rear axle damping bumper shock absorber, includes first sleeve 1 and the second sleeve 2 of coaxial suit, and first sleeve 1 is including inner tube 101 and the outer tube 102 of coaxial fixed setting, and the internal diameter of second sleeve 2 is not less than the external diameter of inner tube 101, and the external diameter of second sleeve 2 is not more than the internal diameter of outer tube 102, and the inner wall of second sleeve 2 is fixed to be set up friction sleeve 201, is interference fit between the inner wall of friction sleeve 201 and the outer wall of inner tube 101.
One end of the inner pipe 101 close to the second sleeve 2 is provided with a beam opening which is contracted inwards;
through setting up the bundle mouth, effectively reduce the external diameter of inner tube 101 tip, be convenient for accomplish the grafting of inner tube 101 and friction sleeve 201 fast when the production assembly.
The end part of the first sleeve 1 or the second sleeve 2 is provided with a vent hole 104, and the vent hole 104 is communicated with a closed space formed by the first sleeve 1 and the second sleeve 2;
when the first sleeve 1 and the second sleeve 2 move relatively, air stored in the inner cavity combined by the first sleeve 1 and the second sleeve 2 can be compressed or amplified, and the damping force between the first sleeve 1 and the second sleeve 2 can be affected as a result, so that the air holes 104 are formed, so that the air in the inner cavity combined by the first sleeve and the second sleeve can be exchanged with the outside in time, and the air is prevented from being compressed or amplified.
The friction sleeve 201 is arranged on the inner wall of the second sleeve 2 close to one end of the first sleeve 1, the stop ring 103 is fixedly arranged on the outer wall of the inner pipe 101 close to one end of the second sleeve 2, and the outer wall of the stop ring 103 is slidably mounted with the inner wall of the second sleeve 2;
in production, first sleeve 1 and second sleeve 2 all adopt the metal to make, in order to avoid the outer wall of inner tube 101 direct with the loss that the inner wall direct friction of second sleeve 2 caused, simultaneously for reducing the assembly degree of difficulty in the production process, can leave great space between the outer wall of inner tube 101 and the inner wall of second sleeve 2 usually, this just causes the two when relative motion, certain contained angle change can exist in the axis of the two, produce promptly and sway, cause inhomogeneous extrusion to friction sleeve 201 lateral wall, arouse the excessive wear of unilateral, influence the performance of product, therefore, set up stop ring 103 in the bottom outside of inner tube 101, play the effect of support, guarantee the relative motion in-process, the axiality of inner tube 101 and second sleeve 2.
An annular groove is formed in the inner wall of the second sleeve 2, the friction sleeve 201 is fixedly installed in the annular groove in the inner wall of the second sleeve 2, and an annular adjusting groove 202 is formed in the inner wall of the friction sleeve 201;
in the case that the length of the friction sleeve 201 is determined, the frictional contact area between the friction sleeve 201 and the outer wall of the inner pipe 101 can be changed by adjusting the width of the adjustment groove 202, so as to change the frictional force therebetween, i.e. change the actual damping effect of the product.
By defining the length of the friction sleeve 201, i.e. the actual frictional contact area of the inner tube 101 and the friction sleeve 201 is not affected by the degree of overlap of the two, i.e. the damping force of the relative movement is not affected by the length of the overlap.
Example three:
referring to fig. 4 and 6, the present invention provides a technical solution: the utility model provides an electric tricycle rear axle damping bumper shock absorber, includes first sleeve 1 and the second sleeve 2 of coaxial suit, and first sleeve 1 is including inner tube 101 and the outer tube 102 of coaxial fixed setting, and the internal diameter of second sleeve 2 is not less than the external diameter of inner tube 101, and the external diameter of second sleeve 2 is not more than the internal diameter of outer tube 102, and the inner wall of second sleeve 2 is fixed to be set up friction sleeve 201, is interference fit between the inner wall of friction sleeve 201 and the outer wall of inner tube 101.
One end of the inner pipe 101 close to the second sleeve 2 is provided with a beam opening which is contracted inwards;
through setting up the bundle mouth, effectively reduce the external diameter of inner tube 101 tip, be convenient for accomplish the grafting of inner tube 101 and friction sleeve 201 fast when the production assembly.
The end part of the first sleeve 1 or the second sleeve 2 is provided with a vent hole 104, and the vent hole 104 is communicated with a closed space formed by the first sleeve 1 and the second sleeve 2;
when the first sleeve 1 and the second sleeve 2 move relatively, air stored in the inner cavity combined by the first sleeve 1 and the second sleeve 2 can be compressed or amplified, and the damping force between the first sleeve 1 and the second sleeve 2 can be affected as a result, so that the air holes 104 are formed, so that the air in the inner cavity combined by the first sleeve and the second sleeve can be exchanged with the outside in time, and the air is prevented from being compressed or amplified.
The inner wall of the outer tube 102 is fixedly provided with a dustproof sealing ring 3 at one end close to the second sleeve 2, and the inner wall of the dustproof sealing ring 3 is installed with the outer wall of the second sleeve 2 in a sliding and sealing manner.
The first sleeve 1 wraps the inner pipe 101 by the outer pipe 102, so that the outer wall of the inner pipe 101 is always in a sealed environment, mud splashed during the running process of a surface vehicle is prevented from being attached to the outer wall of the inner pipe 101, and the friction force between the friction sleeve 201 and the outer wall of the inner pipe 101 is guaranteed to be stable.
The friction sleeve 201 is arranged on the inner wall of the second sleeve 2 close to one end of the first sleeve 1, the stop ring 103 is fixedly arranged on the outer wall of the inner pipe 101 close to one end of the second sleeve 2, and the outer wall of the stop ring 103 is slidably mounted with the inner wall of the second sleeve 2;
in production, first sleeve 1 and second sleeve 2 all adopt the metal to make, in order to avoid the outer wall of inner tube 101 direct with the loss that the inner wall direct friction of second sleeve 2 caused, simultaneously for reducing the assembly degree of difficulty in the production process, can leave great space between the outer wall of inner tube 101 and the inner wall of second sleeve 2 usually, this just causes the two when relative motion, certain contained angle change can exist in the axis of the two, produce promptly and sway, cause inhomogeneous extrusion to friction sleeve 201 lateral wall, arouse the excessive wear of unilateral, influence the performance of product, therefore, set up stop ring 103 in the bottom outside of inner tube 101, play the effect of support, guarantee the relative motion in-process, the axiality of inner tube 101 and second sleeve 2.
An annular groove is formed in the inner wall of the second sleeve 2, the friction sleeve 201 is fixedly installed in the annular groove in the inner wall of the second sleeve 2, and an annular adjusting groove 202 is formed in the inner wall of the friction sleeve 201;
in the case that the length of the friction sleeve 201 is determined, the frictional contact area between the friction sleeve 201 and the outer wall of the inner pipe 101 can be changed by adjusting the width of the adjustment groove 202, so as to change the frictional force therebetween, i.e. change the actual damping effect of the product.
Example four:
referring to fig. 5-6, the present invention provides a technical solution: the utility model provides an electric tricycle rear axle damping bumper shock absorber, includes first sleeve 1 and the second sleeve 2 of coaxial suit, and first sleeve 1 is including inner tube 101 and the outer tube 102 of coaxial fixed setting, and the internal diameter of second sleeve 2 is not less than the external diameter of inner tube 101, and the external diameter of second sleeve 2 is not more than the internal diameter of outer tube 102, and the inner wall of second sleeve 2 is fixed to be set up friction sleeve 201, is interference fit between the inner wall of friction sleeve 201 and the outer wall of inner tube 101.
One end of the inner pipe 101 close to the second sleeve 2 is provided with a beam opening which is contracted inwards;
through setting up the bundle mouth, effectively reduce the external diameter of inner tube 101 tip, be convenient for accomplish the grafting of inner tube 101 and friction sleeve 201 fast when the production assembly.
The end part of the first sleeve 1 or the second sleeve 2 is provided with a vent hole 104, and the vent hole 104 is communicated with a closed space formed by the first sleeve 1 and the second sleeve 2;
when the first sleeve 1 and the second sleeve 2 move relatively, air stored in the inner cavity combined by the first sleeve 1 and the second sleeve 2 can be compressed or amplified, and the damping force between the first sleeve 1 and the second sleeve 2 can be affected as a result, so that the air holes 104 are formed, so that the air in the inner cavity combined by the first sleeve and the second sleeve can be exchanged with the outside in time, and the air is prevented from being compressed or amplified.
One end of the outer wall of the second sleeve 2, which is close to the first sleeve 1, is fixedly provided with a dustproof sealing ring 3, and the outer wall of the dustproof sealing ring 3 is installed with the inner wall of the outer tube 102 in a sliding and sealing manner;
the first sleeve 1 wraps the inner pipe 101 by the outer pipe 102, so that the outer wall of the inner pipe 101 is always in a sealed environment, mud splashed during the running process of a surface vehicle is prevented from being attached to the outer wall of the inner pipe 101, and the friction force between the friction sleeve 201 and the outer wall of the inner pipe 101 is guaranteed to be stable.
The friction sleeve 201 is arranged on the inner wall of the second sleeve 2 close to one end of the first sleeve 1, the stop ring 103 is fixedly arranged on the outer wall of the inner pipe 101 close to one end of the second sleeve 2, and the outer wall of the stop ring 103 is slidably mounted with the inner wall of the second sleeve 2;
in production, first sleeve 1 and second sleeve 2 all adopt the metal to make, in order to avoid the outer wall of inner tube 101 direct with the loss that the inner wall direct friction of second sleeve 2 caused, simultaneously for reducing the assembly degree of difficulty in the production process, can leave great space between the outer wall of inner tube 101 and the inner wall of second sleeve 2 usually, this just causes the two when relative motion, certain contained angle change can exist in the axis of the two, produce promptly and sway, cause inhomogeneous extrusion to friction sleeve 201 lateral wall, arouse the excessive wear of unilateral, influence the performance of product, therefore, set up stop ring 103 in the bottom outside of inner tube 101, play the effect of support, guarantee the relative motion in-process, the axiality of inner tube 101 and second sleeve 2.
An annular groove is formed in the inner wall of the second sleeve 2, the friction sleeve 201 is fixedly installed in the annular groove in the inner wall of the second sleeve 2, and an annular adjusting groove 202 is formed in the inner wall of the friction sleeve 201;
in the case that the length of the friction sleeve 201 is determined, the frictional contact area between the friction sleeve 201 and the outer wall of the inner pipe 101 can be changed by adjusting the width of the adjustment groove 202, so as to change the frictional force therebetween, i.e. change the actual damping effect of the product.
During the design, friction sleeve 201 adopts silica gel foaming material, has better frictional properties, and when the design, according to the damping force that actual scene needs, the internal diameter of design friction sleeve 201, the internal diameter is less, and the frictional resistance between friction sleeve 201 and the inner tube 101 outer wall is big more, adjusts friction sleeve 201's axial length simultaneously, adjusts the frictional contact area promptly, can adjust frictional resistance equally, satisfies the user demand of multiple scene, reduces the design degree of difficulty.
In the production or use process, the width of the adjusting groove 202 is adjusted to adjust the friction contact area, so that the damping force of the product is adjusted, and the method specifically comprises the following steps: first, the first sleeve 1 and the second sleeve 2 are separated, then the friction sleeve 201 and the second sleeve 2 are fixed, the width of the adjustment groove 202 is widened by removing the material, thereby reducing the friction contact surface, and then the first sleeve 1 and the second sleeve 2 are reassembled.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an electric tricycle rear axle damping bumper shock absorber, includes coaxial suit's first sleeve (1) and second sleeve (2), its characterized in that: first sleeve (1) is including inner tube (101) and outer tube (102) of coaxial fixed setting, the internal diameter of second sleeve (2) is not less than the external diameter of inner tube (101), the external diameter of second sleeve (2) is not more than the internal diameter of outer tube (102), the inner wall of second sleeve (2) is fixed to be set up friction sleeve (201), be interference fit between the inner wall of friction sleeve (201) and the outer wall of inner tube (101).
2. The electro-tricycle rear axle damping shock absorber of claim 1, wherein: one end of the inner pipe (101) close to the second sleeve (2) is provided with a bundling opening which is contracted inwards.
3. The electro-tricycle rear axle damping shock absorber of claim 2, wherein: the end part of the first sleeve (1) or the second sleeve (2) is provided with a vent hole (104), and the vent hole (104) is communicated with a closed space formed by the first sleeve (1) and the second sleeve (2).
4. The rear axle damping shock absorber of the electro-tricycle of any of claims 1-3, wherein: the inner wall of the outer pipe (102) is close to one end of the second sleeve (2) and is fixedly provided with a dustproof sealing ring (3), and the inner wall of the dustproof sealing ring (3) is installed with the outer wall of the second sleeve (2) in a sliding sealing mode.
5. The rear axle damping shock absorber of the electro-tricycle of any of claims 1-3, wherein: the outer wall of the second sleeve (2) is close to one end of the first sleeve (1) and is fixedly provided with a dustproof sealing ring (3), and the outer wall of the dustproof sealing ring (3) is installed with the inner wall of the outer tube (102) in a sliding sealing mode.
6. The electro-tricycle rear axle damping shock absorber of claim 1 or 2, characterized in that: the friction sleeve (201) is arranged on the inner wall of one end, close to the first sleeve (1), of the second sleeve (2), the stop ring (103) is fixedly arranged on the outer wall of one end, close to the second sleeve (2), of the inner tube (101), and the outer wall of the stop ring (103) is installed with the inner wall of the second sleeve (2) in a sliding mode.
7. The electro-tricycle rear axle damping shock absorber of claim 6, wherein: the inner wall of the second sleeve (2) is provided with an annular groove, the friction sleeve (201) is fixedly installed in the annular groove in the inner wall of the second sleeve (2), and the inner wall of the friction sleeve (201) is provided with an annular adjusting groove (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021350962.7U CN213323523U (en) | 2020-07-10 | 2020-07-10 | Rear axle damping shock absorber of electric tricycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021350962.7U CN213323523U (en) | 2020-07-10 | 2020-07-10 | Rear axle damping shock absorber of electric tricycle |
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| CN213323523U true CN213323523U (en) | 2021-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111661220A (en) * | 2020-07-10 | 2020-09-15 | 河南省稳众汽车配件有限公司 | Rear axle damping shock absorber of electric tricycle |
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- 2020-07-10 CN CN202021350962.7U patent/CN213323523U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111661220A (en) * | 2020-07-10 | 2020-09-15 | 河南省稳众汽车配件有限公司 | Rear axle damping shock absorber of electric tricycle |
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