CN218536332U - Suspension structure for fuel cell and vehicle - Google Patents
Suspension structure for fuel cell and vehicle Download PDFInfo
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- CN218536332U CN218536332U CN202222852516.1U CN202222852516U CN218536332U CN 218536332 U CN218536332 U CN 218536332U CN 202222852516 U CN202222852516 U CN 202222852516U CN 218536332 U CN218536332 U CN 218536332U
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- suspension
- fuel cell
- suspension structure
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- vibration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model discloses a suspension structure and vehicle for fuel cell. The suspension structure for the fuel cell comprises a body part, a first connecting part, a second connecting part and a damping part, wherein a suspension mounting hole is formed in the body part; the first connecting part is connected with the body part and extends in the first direction, and a first connecting point is arranged on the first connecting part; the second connecting part is connected with the body part and extends in the second direction, and a second connecting point is arranged on the second connecting part; the damping piece is arranged on the first connecting point and/or the second connecting point, and the first connecting point and/or the second connecting point are connected with the vehicle body through the damping piece. The utility model discloses a suspension structure is fixed through setting up the cooperation of first connecting portion and second connecting portion and longeron, has improved the stability that suspension structure and longeron are connected, sets up damping piece and bolster and realizes dual damping, has reduced longeron and fuel cell and has transmitted suspension structure's vibration, and then has improved the security and the travelling comfort of vehicle.
Description
Technical Field
The utility model belongs to the technical field of the vehicle and specifically relates to a suspension structure and vehicle for fuel cell is related to.
Background
In the related art, a hydrogen circulating pump, an air compressor, an electronic water pump and the like of a hydrogen fuel cell stack generate obvious vibration, so that the problem of how to reduce the vibration of the devices and how to relieve the riding comfort of precision components such as a hydrogen fuel cell integrated board and a cockpit is a problem to be solved urgently for a hydrogen fuel cell automobile. The hydrogen fuel cell suspension generally adopts a rubber cushion form, the suspension cushion has a simple structure and poor flexibility, the rigidity can be adjusted only by adjusting the sizes of rubber materials and the cushion, the adjustment range of the suspension rigidity is small, the complex arrangement requirements cannot be met, the overall vibration isolation effect is poor, the severe requirements on the space of an automobile chassis are met, and the hydrogen fuel cell suspension cannot be widely applied to various hydrogen fuel automobile types. In addition, the suspension structure that the similar damping effect that has is single bush structure, is different from the utility model discloses a suspension structure only can carry out partly buffering to the vibration of fuel cell inside and the excitation that comes from the road surface, but the vibration isolation effect is general, and is little to the vibration cushioning effect of automobile body longeron, is difficult to protect the inside accurate part of battery storehouse under the high vibration to transmit the vibrations and the road surface excitation of fuel cell storehouse to the cockpit easily, influence the travelling comfort.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. To this end, an object of the present invention is to provide a suspension structure for an automotive fuel cell and a vehicle. The utility model discloses a suspension structure is fixed through setting up first connecting portion and second connecting portion and longeron cooperation, has improved the stability that suspension structure and longeron are connected, sets up the damping piece, has reduced the longeron and has transmitted suspension structure's vibration, and then has improved the security and the travelling comfort of vehicle.
The utility model discloses still provide a vehicle including above-mentioned suspension structure.
The suspension structure for the fuel cell comprises a body part, a first connecting part, a second connecting part and a damping part, wherein a suspension mounting hole is formed in the body part; the first connecting part is connected with the body part and extends in a first direction, and a first connecting point is arranged on the first connecting part; the second connecting part is connected with the body part and extends in the second direction, and a second connecting point is arranged on the second connecting part; the damping piece is arranged on the first connecting point and/or the second connecting point, and the first connecting point and/or the second connecting point are connected with the vehicle body through the damping piece.
According to the utility model discloses an embodiment, the suspension structure passes through the first connecting point on the first connecting portion and the second connecting point on the second connecting portion and the cooperation of automobile body longeron, makes the suspension structure fix on automobile body longeron, and body portion is connected with the cooperation of fuel cell stack, realizes being connected of fuel cell and automobile body longeron. The vibration damping piece is arranged at the connecting point of the vehicle body longitudinal beam and the suspension structure, so that the vibration of the vehicle body can be buffered, the vibration energy transmitted to the body part is reduced, the fuel cell is protected, meanwhile, the vibration from the fuel cell transmitted to the body part can be buffered secondarily, and the displacement deformation caused by vibration excitation can be effectively controlled. The suspension structure improves the stability of connection between the fuel cell and the vehicle body longitudinal beam, protects the precise parts inside the fuel cell, and further improves the comfort and the safety of the vehicle.
According to some embodiments of the invention, the first connection point is configured as a first connection hole formed on the first connection portion, the second connection point is configured as a second connection hole formed on the second connection portion, and the vibration damping member is accommodated in the first connection hole and/or the second connection hole.
According to some embodiments of the invention, the damping piece comprises: the support piece is accommodated in the first connecting hole and/or the second connecting hole, and a fastener mounting hole is formed in the support piece; the flexible piece is arranged on at least part of the periphery of the support piece and connects the support piece with the inner wall of the first connecting hole and/or the inner wall of the second connecting hole.
According to some embodiments of the invention, the flexible member comprises a first end and a second end, the first end being connected to the flexible member.
According to some embodiments of the present invention, the suspension structure further comprises: the suspension outer pipe is sleeved on the periphery of the suspension inner pipe, and the suspension outer pipe is arranged in the suspension mounting hole and connected with the inner wall of the suspension mounting hole; the buffer piece, the buffer piece set up in the internal perisporium of suspension outer tube with between the periphery wall of suspension inner tube.
According to some embodiments of the invention, at least one end of the buffer member in the axial direction is formed with a deformation groove surrounding the suspension inner tube.
According to some embodiments of the present invention, at least one end of the buffer member in the axial direction is formed with a first flange extending in the radial direction, and the first flange is aligned with the body portion in the axial direction.
According to some embodiments of the utility model, be formed with the suspension holding surface on the body portion, the tip of suspension outer tube is formed with the second turn-ups, the second turn-ups is radially kept away from the suspension outer tube extend and set up in the holding surface with between the first turn-ups.
According to some embodiments of the utility model, be formed with the orientation on the first turn-ups and deviate from the convex damping of suspension holding surface is protruding.
The vehicle according to the present invention is briefly described below.
According to the utility model discloses a be provided with the suspension in the above-mentioned embodiment on the vehicle, because according to the utility model discloses a be provided with the suspension in the above-mentioned embodiment on the vehicle, consequently the in-process of traveling of vehicle has reduced the vibration that the automobile body longeron transmitted the suspension and the vibration that fuel cell transmitted the suspension under the double buffering effect of suspension's damping piece and bolster, has strengthened the durability of suspension, has protected the inside accurate part of fuel cell, and then has improved the travelling comfort and the security of vehicle.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block diagram of a suspension structure according to an embodiment of the present invention;
fig. 2 is a block diagram of a suspension structure according to an embodiment of the present invention;
fig. 3 is a schematic view of the suspension inner tube and the suspension outer tube according to the embodiment of the present invention;
fig. 4 is a structural view of a damping member according to an embodiment of the present invention;
figure 5 is a cross-sectional view of a body portion according to an embodiment of the invention;
fig. 6 is a front view of a suspension structure according to an embodiment of the present invention;
fig. 7 is an assembly view of a suspension structure according to an embodiment of the present invention.
Reference numerals are as follows:
a suspension structure 1;
a body portion 11;
a suspension mounting hole 111;
the suspended outer tube 112, the second flange 1121;
a suspended inner tube 113;
the damping part 114, the deformation groove 1141, the first flanging 1142 and the damping protrusion 11421;
a suspended support surface 115;
a first connection portion 12, a first connection hole 121;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
In the related art, a hydrogen circulating pump, an air compressor, an electronic water pump and the like of a hydrogen fuel cell stack generate obvious vibration, so that the problem of how to reduce the vibration of the devices and how to relieve the riding comfort of precision components such as a hydrogen fuel cell integrated board and a cockpit is a problem to be solved urgently for a hydrogen fuel cell automobile. The hydrogen fuel cell suspension generally adopts a rubber cushion form, the suspension cushion has a simple structure and poor flexibility, the rigidity can be adjusted only by adjusting the sizes of rubber materials and the cushion, the adjustment range of the suspension rigidity is small, the complex arrangement requirements cannot be met, the overall vibration isolation effect is poor, the severe requirements on the space of an automobile chassis are met, and the hydrogen fuel cell suspension cannot be widely applied to various hydrogen fuel automobile types. In addition, the suspension structure that the similar damping effect that has is single bush structure, is different from the utility model discloses a suspension structure only can carry out partly buffering to the vibration of fuel cell inside and the excitation that comes from the road surface, but the vibration isolation effect is general, and is little to the vibration cushioning effect of automobile body longeron, is difficult to protect the inside accurate part of battery storehouse under the high vibration to transmit the vibrations and the road surface excitation of fuel cell storehouse to the cockpit easily, influence the travelling comfort.
A suspension structure for a fuel cell according to an embodiment of the present invention is described below with reference to fig. 1 to 7.
According to an embodiment of the present invention, a suspension structure for a fuel cell includes a body portion 11, a first connection portion 12, a second connection portion 13, and a vibration damper 14, a suspension mounting hole 111 being formed in the body portion; the first connecting portion 12 is connected to the main body 11 and extends in a first direction, and the first connecting portion 12 is provided with a first connecting point; the second connecting part 13 is connected with the body part and extends in the second direction, and a second connecting point is arranged on the second connecting part 13; the damping piece 14 is arranged at the first connecting point and/or the second connecting point, and the first connecting point and/or the second connecting point are connected with the vehicle body through the damping piece 14.
According to the utility model discloses an embodiment, suspension 1 makes suspension 1 fix on the automobile body longeron through the cooperation of the first connecting point on the first connecting portion 12 and the second connecting point on the second connecting portion 13 with the automobile body longeron, and this body portion 11 is connected with the cooperation of fuel cell stack, realizes being connected of fuel cell and automobile body longeron. The vibration damping member 14 is provided at the connecting point between the vehicle body side member and the suspension structure 1, and is capable of damping the vibration of the vehicle body to reduce the vibration energy transmitted to the body portion 11, thereby protecting the fuel cell, and also secondarily damping the vibration from the fuel cell transmitted to the body portion 11, thereby effectively controlling the displacement deformation caused by the vibration excitation. The suspension structure 1 improves the stability of connection between the fuel cell and the vehicle body longitudinal beam, protects the precise parts inside the fuel cell, and further improves the comfort and the safety of the vehicle.
According to an embodiment of the present invention, the first connection point is configured as a first connection hole 121 formed on the first connection portion 12, the second connection point is configured as a second connection hole 131 formed on the second connection portion 13, and the damping member 14 is received in the first connection hole 121 and/or the second connection hole 131. As a result of the vehicle travelling, vibrations excited by the road surface are transmitted via the body side members to the suspension structure 1 and thus to the fuel cell. In some examples, the first connecting portion 12 and the second connecting portion 13 are fixed to the vehicle body side member in a matching manner, so that the stability of the suspension structure 1 is improved, and the vibration damping member 14 is accommodated in the first connecting hole 121 and/or the second connecting hole 131, so that vibration transmitted by the vehicle body side member can be buffered, vibration energy subsequently transmitted to the battery stack through the suspension structure 1 is reduced, parts inside the fuel cell are protected, and the reliability of the suspension structure 1 is improved.
According to an embodiment of the present invention, the damping member 14 includes a supporting member 141 and a flexible member 142, the supporting member 141 is received in the first connecting hole 121 and/or the second connecting hole 131, and a fastener mounting hole 1411 is formed on the supporting member 141; the flexible member 142 is disposed on at least a portion of the outer circumference of the supporter 141 and connects the supporter 141 with the inner wall of the first connection hole 12 and/or the inner wall of the second connection hole 13. Since the suspension structure 1 is connected to the vehicle body longitudinal member via the vibration damper 14, the tightness of the connection will directly affect the stability of the suspension structure 1. In some examples, the vibration damping member 14 is configured to include a supporting member 141 and a flexible member 142, a fastener mounting hole 1411 is formed in the supporting member 141, the fastener mounting hole 1411 is used for being matched with a longitudinal beam, so that the connection strength between the suspension structure 1 and the longitudinal beam is improved, and the flexible member 142 is sleeved on the periphery of the supporting member 141 and connects the supporting member 141 with the inner wall of the first connection hole 121 and/or the inner wall of the second connection hole 131, so that vibration transmitted by the longitudinal beam can be damped, and the vibration damping effect of the suspension structure 1 is improved.
According to one embodiment of the present invention, the two ends of the flexible member 142 gradually decrease in diameter in a direction away from each other. Since the flexible member 142 is located between the supporting member 141 and the first connection hole 121 and/or the second connection hole 131, the matching between the flexible member 142 and the supporting member 141, the matching between the flexible member 142 and the inner wall of the first connection hole 121, and the matching between the flexible member 142 and the inner wall of the second connection hole all affect the stability of the connection between the longitudinal beam and the suspension structure 1. As shown in fig. 6, in some examples, the two ends of the flexible member 142 gradually decrease in diameter in a direction away from each other, and present a gradual shape similar to a "spindle", which improves the ease of processing the flexible member 142 when it is press-fitted into the first connection hole 121 and/or the second connection hole 131, and makes the connection between the flexible member 142 and the support member 141 tighter; during assembly and vehicle running, the fusiform end face of the flexible part 142 can be compressed to a certain extent, so that the first connecting part 12 and/or the second connecting part 13 can be tightly abutted against the connecting surface of the longitudinal beam, and meanwhile, the vibration exciting part from the height direction of the vehicle body is absorbed by the shock absorbing part 14, and the effects of buffering and stabilizing connection are achieved.
According to an embodiment of the present invention, the suspension structure 1 further includes a suspension outer tube 112, a suspension inner tube 113, and a buffer member 114, the suspension outer tube 112 is sleeved on the periphery of the suspension inner tube 113, the suspension outer tube 112 is disposed in the suspension mounting hole 111 and connected to the inner wall of the suspension mounting hole; the buffer member 114 is disposed between the inner circumferential wall of the suspended outer tube 112 and the outer circumferential wall of the suspended inner tube 113. Since the fuel cell is fixed by fitting with the suspension mounting hole 111, the vibration of the fuel cell itself is transmitted to the suspension structure 1. In some examples, the suspension structure 1 further includes a suspension outer tube 112, a suspension inner tube 113, and a buffer member 114, the suspension outer tube 112 is connected to the inner wall of the suspension mounting hole 111, the buffer member 114 is located between the suspension inner tube 113 and the suspension outer tube 112, and the fuel cell is connected and fixed to the suspension inner tube 113 in a riveting manner, so that the connection stability of the fuel cell to the suspension structure 1 is improved. The buffer member 114 can buffer the vibration of the fuel cell, thereby protecting the precision parts inside the fuel cell and improving the reliability of the suspension structure 1.
According to an embodiment of the present invention, at least one end of the buffer member 114 in the axial direction is formed with a deformation groove 1141 surrounding the suspension inner tube 113. The vibrations from the fuel cell due to the suspension structure 1 include vertical vibrations and longitudinal/lateral vibrations in the horizontal plane. In some examples, at least one end of the buffer member 114 in the axial direction is formed with a deformation groove 114 surrounding the suspension inner tube, so that vibration in the horizontal plane direction can be effectively buffered, deformation and displacement of the suspension structure 1 are avoided, and the stability of the suspension structure 1 is improved.
According to an embodiment of the present invention, at least one end of the buffer member 114 in the axial direction is formed with a first flange 1142 extending in the radial direction, and the first flange 1142 is opposite to the body portion 11 in the axial direction. The vibration excitation due to the fuel cell causes the mating surfaces of the cell stack and the suspending inner tube 113 to rub against the buffer member 114 in the horizontal and vertical directions. In some examples, at least one end of the buffer member 114 in the axial direction is formed with a first flange 1142, the first flange 1142 and the second flange 1121 are sequentially stacked on the suspension support surface 115 from top to bottom in the vertical direction, and the facing direction can be understood as that in the height direction, the projection of the first flange 1142 overlaps with the projection of the suspension support surface 115, and the first flange 1142 can effectively protect the matching surface between the battery stack and the suspension inner tube 113, and avoid the occurrence of abnormal sound caused by the friction between the matching surface and the buffer member.
According to an embodiment of the present invention, the suspension support surface 115 is formed on the body portion 11, the end portion of the suspension outer tube 112 is formed with a second flange 1121, and the second flange 1121 is radially away from the suspension outer tube 112, extends and is disposed between the support surface 115 and the first flange 1142. Since the suspension mounting hole 111 may be subjected to vibration from the vertical direction of the fuel cell, the stability of the suspension outer tube 112 in fitting with the suspension mounting hole 111 is affected. In some examples, the end of the suspension outer tube 112 is formed with a second flange 1121, which can prevent the suspension outer tube 112, the suspension inner tube 113, and the buffer member 114 from falling off due to large vibration excitation impact of the vehicle body and the fuel cell. The durability of the suspension structure 1 is improved.
According to the utility model discloses an embodiment, be formed with the protruding 11421 of damping that deviates from suspension holding surface 115 towards on the first turn-ups 1142. The fuel cell collides with the mounting hole 111 for suspension due to vibration of the fuel cell. In some examples, the first flange 1142 is formed with a protrusion, so as to buffer the vertical vibration generated by the fuel cell, protect the fuel cell from being damaged due to collision with the suspension structure 1 caused by vibration, and improve the reliability of the suspension structure 1.
The vehicle according to the present invention is briefly described below.
According to the utility model discloses a be provided with the suspension in the above-mentioned embodiment on the vehicle, because according to the utility model discloses a be provided with the suspension in the above-mentioned embodiment on the vehicle, consequently the in-process of traveling of vehicle has reduced the vibration that the automobile body longeron transmitted the suspension and the vibration that fuel cell transmitted the suspension under the double buffering effect of suspension's damping piece and bolster, has strengthened the durability of suspension, has protected the inside accurate part of fuel cell, and then has improved the travelling comfort and the security of vehicle.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "on", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A suspension structure for a fuel cell, comprising:
a body portion having a suspended mounting hole formed therein;
a first connecting part connected with the body part and extending in a first direction, the first connecting part being provided with a first connecting point;
a second connecting portion connected to the body portion and extending in a second direction, the second connecting portion having a second connection point provided thereon;
the first connecting point and/or the second connecting point are/is provided with a damping piece, and the first connecting point and/or the second connecting point are/is connected with the vehicle body through the damping piece.
2. The suspension structure for a fuel cell according to claim 1, wherein the first connection point is configured as a first connection hole formed on the first connection portion, the second connection point is configured as a second connection hole formed on the second connection portion, and the vibration damper is accommodated in the first connection hole and/or the second connection hole.
3. The suspension structure for a fuel cell according to claim 2, wherein the vibration damper includes:
the support piece is accommodated in the first connecting hole and/or the second connecting hole, and a fastener mounting hole is formed in the support piece;
the flexible piece is arranged on at least part of the periphery of the support piece and connects the support piece with the inner wall of the first connecting hole and/or the inner wall of the second connecting hole.
4. The suspension structure for a fuel cell according to claim 3, wherein both ends of the flexible member are gradually reduced in diameter in a direction away from each other.
5. The suspension structure for a fuel cell according to claim 1, characterized by further comprising:
the suspension outer pipe is sleeved on the periphery of the suspension inner pipe, and the suspension outer pipe is arranged in the suspension mounting hole and connected with the inner wall of the suspension mounting hole;
the buffer piece is arranged between the inner peripheral wall of the suspension outer pipe and the outer peripheral wall of the suspension inner pipe.
6. The suspension structure for a fuel cell according to claim 5, wherein at least one end of the buffer member in the axial direction is formed with a deformation groove surrounding the suspension inner tube.
7. The suspension structure for a fuel cell according to claim 5, wherein at least one end of the buffer member in the axial direction is formed with a first burring extending in the radial direction, the first burring being opposed to the body portion in the axial direction.
8. The suspension structure for a fuel cell according to claim 7, wherein a suspension support surface is formed on the body portion, and an end portion of the suspension outer tube is formed with a second flange that extends away from the suspension outer tube in a radial direction and is provided between the support surface and the first flange.
9. The suspension structure for a fuel cell according to claim 8, wherein the first flange is formed with a vibration-damping projection projecting away from the suspension support surface.
10. A vehicle characterized by comprising the suspension structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222852516.1U CN218536332U (en) | 2022-10-27 | 2022-10-27 | Suspension structure for fuel cell and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222852516.1U CN218536332U (en) | 2022-10-27 | 2022-10-27 | Suspension structure for fuel cell and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218536332U true CN218536332U (en) | 2023-02-28 |
Family
ID=85282776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222852516.1U Active CN218536332U (en) | 2022-10-27 | 2022-10-27 | Suspension structure for fuel cell and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218536332U (en) |
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2022
- 2022-10-27 CN CN202222852516.1U patent/CN218536332U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20230621 Address after: 071000 No. 2266 Chaoyang South Street, Hebei, Baoding Patentee after: GREAT WALL MOTOR Co.,Ltd. Address before: No. 2266 Chaoyang South Street, Lianchi District, Baoding City, Hebei Province Patentee before: Self-confidence Zhixing Technology Co.,Ltd. |