CN216504746U - Auxiliary mounting device for vehicle body parts - Google Patents
Auxiliary mounting device for vehicle body parts Download PDFInfo
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- CN216504746U CN216504746U CN202123432870.0U CN202123432870U CN216504746U CN 216504746 U CN216504746 U CN 216504746U CN 202123432870 U CN202123432870 U CN 202123432870U CN 216504746 U CN216504746 U CN 216504746U
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- 239000002184 metal Substances 0.000 description 5
- 230000008439 repair process Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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Abstract
The utility model discloses an auxiliary installation device for vehicle body parts, which comprises: a device body; the positioning fixture comprises a first driving mechanism, a fixture mounting seat, a first positioning pin, a clamping pin and a second driving mechanism, wherein the fixture mounting seat can be driven by the first driving mechanism to move along the guide structure; the device body is matched with the vehicle body through the positioning assembly to realize positioning on the vehicle body, and parts clamped by the positioning clamp are limited at the installation position of the vehicle body. It can realize that the high accuracy is located the automobile body with spare part.
Description
Technical Field
The utility model is used in the field of automobile manufacturing, and particularly relates to an auxiliary mounting device for automobile body parts.
Background
The sheet metal part needs to be fastened on a body-in-white through nuts in the automobile manufacturing process, the body-in-white is provided with studs, the sheet metal part is provided with hole sites corresponding to the studs, deviation of +/-1.5 mm exists between the hole site diameter of the sheet metal part and the corresponding stud diameter, the part is easy to shake when the sheet metal part is installed on the body-in-white, the installation positions of the sheet metal part of each trolley are inconsistent, the installation quality reject ratio is high, a large amount of repair cost is caused, and the labor intensity of workers is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve at least one technical problem in the prior art and provide a vehicle body part auxiliary mounting device which can realize high-precision positioning of parts on a vehicle body.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a vehicle body part auxiliary mounting device comprises:
the device body is provided with a positioning component matched with the vehicle body;
the positioning fixture comprises a first driving mechanism, a fixture mounting seat, a first positioning pin, a clamping pin and a second driving mechanism, wherein the fixture mounting seat is assembled on the fixture body through a guide structure and can move along the guide structure under the driving of the first driving mechanism, the first positioning pin is mounted on the fixture mounting seat through a first pin seat, the clamping pin is mounted on the fixture mounting seat through a second pin seat, the first positioning pin and the clamping pin both extend along the moving direction of the fixture mounting seat, a lateral hook groove is formed in the end part of the clamping pin, a clamping hook is arranged inside the clamping pin, and the second driving mechanism can drive the clamping hook to extend out from the lateral hook groove and clamp a part on the second pin seat or drive the clamping hook to retract into the lateral hook groove;
the device body is matched with the vehicle body through the positioning assembly to realize positioning on the vehicle body, and parts clamped by the positioning clamp are limited at the installation position of the vehicle body.
In some embodiments, the guide structure includes a first guide rod seat, a second guide rod seat, and a parallel guide rod disposed between the first guide rod seat and the second guide rod seat.
In some embodiments, the first driving mechanism includes a first driving link, a first transmission link and a first driving handle, the first guide rod seat is provided with a first guide hole, the first driving link passes through the first guide hole to be connected with the clamp mounting seat, an end of the first driving handle is provided with a first driving arm extending to one side, the end of the first driving handle is provided with a first hinge shaft, one end of the first driving link is hinged to the first guide rod seat, the other end of the first driving link is hinged to the first hinge shaft, an end of the first driving arm is provided with a second hinge shaft, and the first driving link is hinged to the second hinge shaft.
In some embodiments, the first drive link is provided with a first limit feature that cooperates with the first drive arm to define the first drive handle angle of rotation.
In some embodiments, a guide sleeve is arranged between the second pin seat and the fixture mounting seat, the clamping hook has a driving part penetrating through the second pin seat and extending into the guide sleeve, the tail end of the driving part is hinged to a second driving connecting rod, the driving part is provided with a guide chute, the guide sleeve is provided with a guide column embedded in the guide chute, the second driving mechanism is connected with the second driving connecting rod and used for driving the second driving connecting rod to move along the guide sleeve, and when the second driving connecting rod drives the clamping hook to move back along the guide sleeve, the guide column is matched with the guide chute, so that the clamping hook extends out of the lateral hook groove and clamps a part on the second pin seat; when the second driving connecting rod drives the clamping hook to advance along the guide sleeve, the guide column is matched with the guide chute, and the clamping hook retracts into the lateral hook groove.
In some embodiments, the second driving mechanism includes a second transmission link and a second driving handle, the clamp mounting seat is provided with a second guide hole, the second driving link passes through the second guide hole and is connected with the driving portion, an end portion of the second driving handle is provided with a second driving arm extending to one side, the end portion of the second driving handle is provided with a third hinge shaft, one end of the second transmission link is hinged to the clamp mounting seat, the other end of the second transmission link is hinged to the third hinge shaft, an end portion of the second driving arm is provided with a fourth hinge shaft, and the second driving link is hinged to the fourth hinge shaft.
In some embodiments, the second drive link is provided with a second limit formation that cooperates with the second drive arm to define a corner of the second drive handle.
In some embodiments, the locating assembly includes a second locating pin and a locating socket.
In some embodiments, the positioning assembly further comprises a movable bolt assembly, the movable bolt assembly comprises a bolt seat and a movable bolt, the bolt seat is connected with the device body, the bolt seat is provided with a bolt hole, the movable bolt is movably arranged in the bolt hole, the movable bolt is provided with a bolt handle, and the bolt seat is provided with a clamping position which is matched with the bolt handle to limit the movable bolt at different positions.
In some embodiments, the device body is provided with a lifting ring and a wrench placing seat.
One of the above technical solutions has at least one of the following advantages or beneficial effects: when the auxiliary installation device adopting the technical scheme is used for carrying out auxiliary installation of parts on an automobile body, the parts are firstly installed on the positioning fixture, a first positioning pin is installed in a pin hole of the parts during installation, a clamping pin is installed in another pin hole of the parts, the second driving mechanism drives the clamping hook to extend out from the lateral hook groove and clamp the parts on the second pin seat, the device body on which the parts are installed is matched with the automobile body through the positioning assembly to realize positioning on the automobile body, and the parts clamped by the positioning fixture are limited at the installation position of the automobile body by means of the matching relation of the device body and the automobile body. After the part is installed, the first driving mechanism drives the clamp installation seat to move, and drives the first positioning pin and the clamping pin to exit from the pin hole of the part, and at the moment, the device body can be taken down from the vehicle body.
According to the technical scheme, the parts can be positioned on the automobile body with high precision. The mounting precision positioning of small parts at the front end of the vehicle body is realized, and the matching stability of the front part quality of the finished vehicle is improved; the repair working time of on-site staff quality personnel is shortened, the maintenance load of the staff is reduced, and the satisfaction degree of the working service quality is improved.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
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 schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic view of the positioning fixture of the embodiment shown in FIG. 1;
FIG. 3 is a schematic view of the clamping hook and the second driving mechanism of the embodiment shown in FIG. 1;
FIG. 4 is a schematic view of the movable latch assembly of the embodiment shown in FIG. 1;
FIG. 5 is a schematic view of the clamping assembly of the embodiment shown in FIG. 1;
FIG. 6 is a schematic view of the embodiment shown in FIG. 1 as assembled to a vehicle body.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the present invention, if directions (up, down, left, right, front, and rear) are described, it is only for convenience of describing the technical solution of the present invention, and it is not intended or implied that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, it is not to be construed as limiting the present invention.
In the utility model, the meaning of "a plurality" is one or more, the meaning of "a plurality" is more than two, and the terms of "more than", "less than", "more than" and the like are understood to exclude the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.
Fig. 6 shows a reference direction coordinate system of the embodiment of the present invention, and the following describes the embodiment of the present invention with reference to the directions shown in fig. 6.
Referring to fig. 1 to 6, an embodiment of the utility model provides a vehicle body part auxiliary mounting device, which comprises a device body 1 and a positioning clamp 2.
Wherein, the positioning fixture 2 is arranged on the device body 1, the positioning fixture 2 can realize the fast and accurate positioning and clamping of the part 3 on the device body 1, the positioning fixture 2 comprises a first driving mechanism 21, a fixture mounting seat 22, a first positioning pin 23, a clamping pin 24 and a second driving mechanism 25, the fixture mounting seat 22 is assembled on the device body 1 through a guiding structure and can move along the guiding structure through the driving of the first driving mechanism 21, the first positioning pin 23 is installed on the fixture mounting seat 22 through a first pin seat 231, the clamping pin 24 is installed on the fixture mounting seat 22 through a second pin seat 241, the first positioning pin 23 and the clamping pin 24 are at a certain distance, the first positioning pin 23 and the clamping pin 24 both extend along the moving direction of the fixture mounting seat 22, a lateral groove is arranged at the end of the clamping pin 24, a clamping hook 242 is arranged inside the clamping pin 24, the second driving mechanism 25 can drive the clamping hook 242 to extend out from the lateral groove and clamp the part 3 on the second pin seat 241, or to drive the gripping hooks 242 to retract inside the lateral hook grooves.
Referring to fig. 6, the device body 1 is used for being matched with a vehicle body 4 to realize that the positioning fixture 2 and the parts 3 clamped by the positioning fixture are accurately positioned on the vehicle body 4. The device body 1 is provided with a positioning assembly matched with the vehicle body 4, the device body 1 is matched with the vehicle body 4 through the positioning assembly to realize positioning on the vehicle body 4, and the part 3 clamped by the positioning clamp 2 is limited at the installation position of the vehicle body 4.
When the auxiliary installation device of the technical scheme is used for auxiliary installation of the part 3 on the vehicle body 4, the part 3 is firstly installed on the positioning fixture 2, the first positioning pin 23 is installed in one pin hole of the part 3 during installation, the clamping pin 24 is installed in the other pin hole of the part 3, the second driving mechanism 25 drives the clamping hook 242 to extend out from the lateral hook groove and clamp the part 3 on the second pin seat, the device body 1 on which the part 3 is installed is matched with the vehicle body through the positioning assembly to realize positioning on the vehicle body, and the part 3 clamped by the positioning fixture 2 is limited at the installation position of the vehicle body by means of the matching relation between the device body 1 and the vehicle body. After the part 3 is installed, the first driving mechanism 21 drives the clamp installation seat 22 to move, and drives the first positioning pin 23 and the clamping pin 24 to exit from the pin hole of the part 3, and at this time, the device body 1 can be taken down from the vehicle body.
According to the technical scheme, the parts 3 can be positioned on the vehicle body 4 with high precision. The mounting precision positioning of small parts at the front end of the vehicle body is realized, and the matching stability of the front part quality of the finished vehicle is improved; the repair working time of on-site staff quality personnel is shortened, the maintenance load of the staff is reduced, and the satisfaction degree of the working service quality is improved.
The guiding structure may be a guide groove, a guide rail, a guide rod, or the like, for example, in some embodiments, referring to fig. 2 and 3, the guiding structure includes a first guide rod seat 261, a second guide rod seat 262, and a parallel guide rod 263 disposed between the first guide rod seat 261 and the second guide rod seat 262, and the clamp installation seat 22 is slidably mounted on the parallel guide rod 263 and drives the first positioning pin 23 and the clamping pin 24 to move together along the parallel guide rod 263 under the driving of the first driving mechanism 21. In order to accurately control the movement stroke, scales may be provided along the guide structure.
In some embodiments, referring to fig. 2 and 3, the first driving mechanism 21 includes a first driving link 211, a first driving link 212, and a first driving handle 213, the first guide seat 261 is provided with a first guide hole, the first driving link 211 passes through the first guide hole to be connected to the clamp mounting seat 22, the first driving handle 213 is disposed on one side of the first guide seat 261 away from the clamp mounting seat 22, an end portion of the first driving handle 213 is provided with a first driving arm 214 protruding to one side, an end portion of the first driving handle 213 is provided with a first hinge shaft, one end of the first driving link 212 is hinged to the first guide seat 261, the other end of the first driving link 212 is hinged to the first hinge shaft, an end portion of the first driving arm 214 is provided with a second hinge shaft, and the first driving link 211 is hinged to the second hinge shaft. The first driving mechanism 21 can rotate around the first hinge shaft by moving the first driving handle 213, and further drive the first driving link 211 to move along the first guide hole through the second hinge shaft of the first driving arm 214, and the first driving link 211 further drives the fixture mounting seat 22 to move along the guide structure. In this embodiment, the first driving mechanism 21 is driven manually, so that cables and air pipes do not need to be introduced, the structure is simpler and lighter, and the whole device is convenient to match and position with a vehicle body.
Further, referring to fig. 3, the first transmission link 212 is provided with a first limit structure 215 cooperating with the first driving arm 214 to define a corner of the first driving handle 213. Through first limit structure 215 and the cooperation of first drive handle 213 can form the auto-lock, guarantee the position accuracy after spare part 3 presss from both sides tightly.
It will be appreciated that the first drive mechanism 21 may also be driven by a pneumatic cylinder and a motor to save labor.
In some embodiments, referring to fig. 2 and 3, a guide sleeve 243 is disposed between the second pin boss 241 and the fixture mounting seat 22, the clamping hook 242 has a driving portion 244 extending into the guide sleeve 243 through the second pin boss 241, a distal end of the driving portion 244 is hinged to a second driving link 245, the driving portion 244 is provided with a guide inclined slot 246, the guide sleeve 243 is provided with a guide post 247 embedded in the guide inclined slot 246, the second driving mechanism 25 is connected to the second driving link 245 for driving the second driving link 245 to move along the guide sleeve 243, wherein when the second driving link 245 drives the clamping hook 242 to retreat along the guide sleeve 243, the guide post 247 cooperates with the guide inclined slot 246 and enables the clamping hook 242 to extend out of the lateral hook slot and clamp the component 3 to the second pin boss 241; when the second driving link 245 drives the clamping hook 242 to advance along the guiding sleeve 243, the guiding column 247 cooperates with the guiding inclined slot 246 and retracts the clamping hook 242 into the lateral hook slot. The present embodiment realizes specific extending, clamping, releasing and retracting actions of the clamping hook 242 during the movement along the guide sleeve 243 by means of the matching relationship of the guide post 247 and the guide chute 246, has ingenious structural design, and can realize the complete high-precision positioning of parts by means of the clamping pin 24.
Further, in some embodiments, referring to fig. 2 and 3, similar to some embodiments of the first driving mechanism 21, the second driving mechanism 25 includes a second driving link 251 and a second driving handle 252, the clamp mounting seat 22 is provided with a second guide hole, the second driving link 245 passes through the second guide hole and is connected with the driving portion 244, the end of the second driving handle 252 is provided with a second driving arm extending to one side, the end of the second driving handle 252 is provided with a third hinge shaft, one end of the second driving link 251 is hinged to the clamp mounting seat 22, the other end of the second driving link 251 is hinged to the third hinge shaft, the end of the second driving arm is provided with a fourth hinge shaft, and the second driving link 245 is hinged to the fourth hinge shaft. The second driving mechanism 25 can rotate around the third hinge shaft by moving the second driving handle 252, and further drive the second driving link 245 to move along the second guiding hole through the fourth hinge shaft of the second driving arm, and the second driving link 245 further drives the clamping hook 242 to move along the guiding sleeve 243. In this embodiment, the second driving mechanism 25 is driven manually without introducing cables and air pipes, so that the structure is simpler and lighter, and the whole device can be conveniently matched and positioned with a vehicle body.
Further, referring to fig. 2, the second driving link 251 is provided with a second limit structure 253 cooperating with the second driving arm to define a corner of the second driving handle 252. And self-locking can be formed by matching the second limiting structure with the second driving handle 252, so that the position precision of the clamped part 3 is ensured.
It will be appreciated that the second drive mechanism 25 may also be driven by a pneumatic cylinder and a motor to save labor.
The device body 1 is matched with the existing structure of the vehicle body through the positioning assembly to realize accurate positioning on the vehicle body, in some embodiments, referring to fig. 1 and 6, the positioning assembly comprises a second positioning pin 51 and a positioning seat 52, when the device body 1 is installed on the vehicle body, the second positioning pin 51 is matched with the existing hole position of the vehicle body, and the positioning seat 52 is abutted against the surface of the vehicle body to provide stable and accurate positioning for the device body 1 and the positioning clamp 2 thereof.
Referring to fig. 1, 4, and 6, in some embodiments, the positioning assembly further includes a movable latch assembly, and the movable latch assembly 53 can movably extend and retract in the process of disassembling and assembling the device body 1, so as to improve the convenience of positioning and installing the whole device on the vehicle body. The movable bolt component 53 comprises a bolt seat 531 and a movable bolt 532, the bolt seat 531 is connected with the device body 1, a bolt hole is formed in the bolt seat 531, the movable bolt 532 is movably mounted in the bolt hole, a bolt handle 533 is arranged on the movable bolt 532, and a clamping position which is matched with the bolt handle 533 to limit the movable bolt 532 to different positions is formed in the bolt seat 531.
In some embodiments, referring to fig. 1, the device body 1 is provided with a suspension ring 11 and a wrench seat 12. The whole device can be suspended by the hanging ring 11, so that the labor intensity of workers in the process of carrying the device is reduced. The wrench placing seat 12 is used for providing a temporary placing position for an electric wrench for screwing nuts, and operation convenience of the whole device is improved.
In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean 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 utility model. 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.
The utility model is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.
Claims (10)
1. The utility model provides a supplementary installation device of automobile body spare part which characterized in that includes:
the device body is provided with a positioning component matched with the vehicle body;
the positioning clamp comprises a first driving mechanism, a clamp mounting seat, a first positioning pin, a clamping pin and a second driving mechanism, wherein the clamp mounting seat is assembled on the device body through a guide structure and can move along the guide structure under the driving of the first driving mechanism, the first positioning pin is mounted on the clamp mounting seat through a first pin seat, the clamping pin is mounted on the clamp mounting seat through a second pin seat, the first positioning pin and the clamping pin both extend along the moving direction of the clamp mounting seat, a lateral groove is formed in the end part of the clamping pin, a clamping hook is arranged inside the clamping pin, and the second driving mechanism can drive the clamping hook to extend out from the lateral groove and clamp a part on the second pin seat or drive the clamping hook to retract into the lateral groove;
the device body is matched with the vehicle body through the positioning assembly to realize positioning on the vehicle body, and parts clamped by the positioning clamp are limited at the installation position of the vehicle body.
2. The vehicle body part auxiliary mounting device according to claim 1, wherein the guide structure comprises a first guide rod seat, a second guide rod seat and a parallel guide rod arranged between the first guide rod seat and the second guide rod seat.
3. The auxiliary installation device for vehicle body parts according to claim 2, wherein the first driving mechanism comprises a first driving link, a first driving link and a first driving handle, the first guide rod seat is provided with a first guide hole, the first driving link passes through the first guide hole and is connected with the clamp installation seat, the end of the first driving handle is provided with a first driving arm extending to one side, the end of the first driving handle is provided with a first hinge shaft, one end of the first driving link is hinged to the first guide rod seat, the other end of the first driving link is hinged to the first hinge shaft, the end of the first driving arm is provided with a second hinge shaft, and the first driving link is hinged to the second hinge shaft.
4. The vehicle body component auxiliary mounting device of claim 3, wherein the first transmission link is provided with a first limiting structure cooperating with the first driving arm to limit the rotation angle of the first driving handle.
5. The auxiliary mounting device for the vehicle body component as claimed in claim 1, wherein a guide sleeve is arranged between the second pin seat and the clamp mounting seat, the clamping hook has a driving part penetrating through the second pin seat and extending into the guide sleeve, the end of the driving part is hinged to a second driving connecting rod, the driving part is provided with a guide chute, the guide sleeve is provided with a guide post embedded into the guide chute, the second driving mechanism is connected with the second driving connecting rod and used for driving the second driving connecting rod to move along the guide sleeve, and when the second driving connecting rod drives the clamping hook to move back along the guide sleeve, the guide post and the guide chute are matched and enable the clamping hook to extend out from the lateral hook groove and clamp the component to the second pin seat; when the second driving connecting rod drives the clamping hook to advance along the guide sleeve, the guide column is matched with the guide chute, and the clamping hook retracts into the lateral hook groove.
6. The auxiliary installation device for vehicle body parts according to claim 5, wherein the second driving mechanism comprises a second transmission link and a second driving handle, the clamp mounting seat is provided with a second guide hole, the second driving link passes through the second guide hole and is connected with the driving portion, the end of the second driving handle is provided with a second driving arm extending to one side, the end of the second driving handle is provided with a third hinge shaft, one end of the second transmission link is hinged to the clamp mounting seat, the other end of the second transmission link is hinged to the third hinge shaft, the end of the second driving arm is provided with a fourth hinge shaft, and the second driving link is hinged to the fourth hinge shaft.
7. The vehicle body component auxiliary mounting device of claim 6, wherein the second transmission link is provided with a second limiting structure which is matched with the second driving arm to limit the rotating angle of the second driving handle.
8. The vehicle body component auxiliary mounting device of claim 1, wherein the locating assembly comprises a second locating pin and a locating socket.
9. The auxiliary installation device for vehicle body parts as claimed in claim 1, wherein the positioning assembly further comprises a movable bolt assembly, the movable bolt assembly comprises a bolt seat and a movable bolt, the bolt seat is connected with the device body, the bolt seat is provided with a bolt hole, the movable bolt is movably installed in the bolt hole, the movable bolt is provided with a bolt handle, and the bolt seat is provided with a clamping position which is matched with the bolt handle to limit the movable bolt at different positions.
10. The auxiliary installation device for vehicle body parts according to claim 1, wherein the device body is provided with a hanging ring and a wrench placing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123432870.0U CN216504746U (en) | 2021-12-30 | 2021-12-30 | Auxiliary mounting device for vehicle body parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123432870.0U CN216504746U (en) | 2021-12-30 | 2021-12-30 | Auxiliary mounting device for vehicle body parts |
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| Publication Number | Publication Date |
|---|---|
| CN216504746U true CN216504746U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123432870.0U Active CN216504746U (en) | 2021-12-30 | 2021-12-30 | Auxiliary mounting device for vehicle body parts |
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| CN (1) | CN216504746U (en) |
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2021
- 2021-12-30 CN CN202123432870.0U patent/CN216504746U/en active Active
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