Automatic assembling mechanism of connector

Abstract

The automatic assembling mechanism comprises a plug connector fixing part, a wire harness stabilizing part and a pushing and assembling mechanism, the plug connector fixing part is used for clamping and fixing a plug connector, the wire harness stabilizing part comprises a centering mechanism and a straightening mechanism, the centering mechanism is configured to be capable of clamping and combining two wire harnesses at the same time so as to determine the center distance between the two wire harnesses, and the pushing and assembling mechanism is used for pushing and assembling the two wire harnesses. The straightening mechanism is configured to be capable of pulling the two wire harnesses in the direction away from the plug connector so as to straighten the two wire harnesses, and the pushing and mounting mechanism is used for pushing a to-be-assembled part to enable the to-be-assembled part to be mounted in the plug connector in a sliding mode. After the wire harness is centered and straightened by the centering mechanism and the straightening mechanism, the spatial attitude of the wire harness is accurate and stable, and then the to-be-assembled part is pushed by the pushing and mounting mechanism to be slidably mounted on the plug connector, so that the to-be-assembled part can be automatically and reliably assembled.

Description

Technical Field

[0001] This invention relates to the field of automated production equipment, and more specifically to an automated assembly mechanism for connectors. Background Technology

[0002] Automotive connectors typically consist of a wire harness and sheaths and charging heads that mate with both ends of the wire harness. During connector manufacturing, the wire harness, sheaths, and charging heads are usually manufactured separately first. Finally, the two ends of the wire harness are inserted and fixed into the sheaths and charging heads to form a single unit. Both the sheaths and charging heads serve as the connectors at the ends of the wire harness. A sealing ring (there may be multiple sealing rings) and a clip are connected to the sliding sleeve on the wire harness. After the wire harness is inserted into the sheath, the sealing ring and clip are slid along the wire harness and pushed towards the sheath, securing them in place. Currently, this assembly process is primarily done manually rather than automatically. This is mainly because the flexible wire harness is prone to misalignment and bending during automated handling, making it difficult for the automated assembly mechanism to accurately position the sealing ring and clip. An inaccurately positioned wire harness can also easily interfere with the automated assembly mechanism, causing damage to the paint and resulting in defective products. While manual assembly yields higher yields, it is inefficient and impacts production. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes an automated assembly mechanism for connectors, which can automatically and reliably assemble the components to be assembled using the upper sliding sleeve connection.

[0004] This invention is achieved using the following technical solution:

[0005] This invention proposes an automated assembly mechanism for connectors, used to assemble connectors. The connector includes a plug and two spaced-apart wire harnesses, one end of which is inserted and fixed in the plug. At least one component to be assembled is slidably mounted on the wire harness. The automated assembly mechanism includes a plug fixing part, a wire harness stabilizing part, and a pushing mechanism. The plug fixing part is a clamp adapted to the shape of the plug for clamping and fixing the plug. The wire harness stabilizing part includes a centering mechanism and a straightening mechanism. The centering mechanism is configured to clamp the two wire harnesses simultaneously to determine the center distance between them. The straightening mechanism is configured to pull the two wire harnesses away from the plug to straighten them. The pushing mechanism is used to push the component to be assembled so that it slides into the plug.

[0006] Preferably, the centering mechanism has two spaced-apart parts in the extension direction of the wire harness.

[0007] Preferably, the two centering mechanisms are a first centering mechanism and a second centering mechanism, and the connector is located at the front end of the wire harness. The first centering mechanism, the second centering mechanism, and the straightening mechanism are arranged alternately from front to back.

[0008] Preferably, the centering mechanism includes an upper clamping member, a lower clamping member, and a clamping drive mechanism. The lower end of the upper clamping member is provided with a first V-shaped groove and a second V-shaped groove that are open downwards and spaced apart from left to right. The upper end of the lower clamping member is provided with a third V-shaped groove and a fourth V-shaped groove that are open upwards and spaced apart from left to right. The first V-shaped groove and the third V-shaped groove are arranged vertically opposite each other and are used to clamp one of the wire harnesses. The second V-shaped groove and the fourth V-shaped groove are arranged vertically opposite each other and are used to clamp the other of the wire harnesses. The clamping drive mechanism is used to drive the upper clamping member and the lower clamping member to close or open vertically.

[0009] Preferably, the straightening mechanism includes a clamping member and a pulling drive mechanism. The clamping member is used to clamp the wire harness, and a connector is defined at the front end of the wire harness. The pulling drive mechanism is connected to the clamping member and is used to drive the clamping member to move back and forth.

[0010] Preferably, the relative direction of the two wire harnesses is defined as the left and right direction, and the straightening mechanism has two opposite straightening mechanisms, each of which is used to tighten one of the wire harnesses.

[0011] Preferably, the straightening mechanism further includes a clamping drive; for each wire harness, the clamping drive is provided with upper clamping teeth and lower clamping teeth, and the clamping drive is used to drive the upper clamping teeth and lower clamping teeth to close or open.

[0012] Preferably, it further includes a first advancing / retreating mechanism, a second advancing / retreating mechanism, and a third advancing / retreating mechanism, defining the relative direction of the two wire harnesses as the left and right direction. The first advancing / retreating mechanism is driven and connected to the centering mechanism to drive the centering mechanism to move left and right closer to or away from the wire harness. The second advancing / retreating mechanism is driven and connected to the straightening mechanism to drive the straightening mechanism to move left and right closer to or away from the wire harness. The third advancing / retreating mechanism is driven and connected to the pushing mechanism to drive the pushing mechanism to move left and right closer to or away from the wire harness.

[0013] Preferably, the fitting to be installed includes a sealing ring and a snap fastener.

[0014] Preferably, the push-fit mechanism is configured to fit onto the wire harness and move along the extension direction of the wire harness.

[0015] Preferably, the pushing mechanism includes an upper closing assembly, a lower closing assembly, a closing drive mechanism, and a pushing drive mechanism. The lower end of the upper closing assembly has a downward-opening first U-shaped groove, and the upper end of the lower closing assembly has an upward-opening second U-shaped groove. The first and second U-shaped grooves are arranged vertically opposite each other. The closing drive mechanism is used to drive the upper and lower closing assemblies to close or open vertically, and the pushing drive mechanism is used to drive the upper and lower closing assemblies to move along the extension direction of the wire harness. The present invention has the following beneficial effects: After the centering mechanism and the straightening mechanism center and straighten the wire harness, the spatial posture of the wire harness is accurate and stable. Then, the push-mount mechanism pushes the part to be assembled to slide and install it into the connector. This can realize the assembly of the part to be assembled automatically and reliably. Since the wire harness is accurately positioned and kept in a straight state, the push-mount mechanism can accurately position the sealing ring and the buckle on the wire harness. The wire harness will also basically not interfere with the position of the automated assembly mechanism, thus improving the yield of product production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connector structure in the embodiment; Figure 2 This is a schematic diagram of the automated assembly mechanism for the connector in the embodiment; Figure 3 This is a schematic diagram of the connector fixing part and the wire harness stabilizing part in the embodiment; Figure 4 yes Figure 3 A magnified view of a section at point A in the middle; Figure 5 yes Figure 3 A magnified view of a section at point B in the middle; Figure 6 This is a schematic diagram of the pushing mechanism in the embodiment (angle one); Figure 7 This is a schematic diagram of the pushing mechanism in the embodiment (angle two). Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] As a preferred embodiment of the present invention, an automated assembly mechanism for a connector is provided, the structure of which can be found in [reference needed]. Figure 1 As shown, the connector includes a connector 10 and two spaced-apart wire harnesses 20. In this embodiment, the connector 10 is a sheath, but in other embodiments it can also be a charging head. Both the sheath and the charging head serve as connectors at the ends of the wire harnesses. One end of the wire harness 20 is inserted and fixed in the connector 10. A sealing ring 30 (there may be multiple sealing rings 30) and a snap fastener 40 are slidably connected to the wire harness 20. By sliding the sealing ring 30 and the snap fastener 40 along the wire harness 20 towards the connector 10, the sealing ring 30 and the snap fastener 40 can be assembled and fixed into the connector 10. The automated assembly mechanism of the connector in this embodiment is used to realize the automated assembly action of "sliding the sealing ring 30 and the snap fastener 40 along the wire harness 20 towards the connector 10". In the following description, the sealing ring 30 and the snap fastener 40 are collectively referred to as "assemblies to be assembled". It is understood that the sealing ring 30 and the snap fastener 40 are only exemplary embodiments of a specific connector structure. For different connectors, it is possible that only one of the sealing ring 30 and the snap fastener 40 is provided, or other parts that are connected to the wire harness 20 by a sliding sleeve and need to be pushed and installed onto the plug-in 10 may be provided. The automated assembly mechanism of this embodiment is basically universal for such "assemblies to be assembled" that are connected to the wire harness 20 by a sliding sleeve and need to be pushed and installed onto the plug-in 10.

[0020] When designing this automated assembly mechanism, the inventors found that the biggest challenge was ensuring the posture stability of the wire harness 20. In an automated assembly process for a connector, the wire harness 20 connected to the connector 10 is placed on the automated assembly mechanism of this embodiment via an automated conveying method, such as clamping and conveying by a multi-axis moving gripper. Alternatively, the automated assembly mechanism of this embodiment can be integrally mounted on a movable base, which receives the wire harness 20 connected to the connector 10 by moving the base. After automated conveying, the wire harness 20 often experiences posture deviation or bending, which adversely affects subsequent automated assembly actions. Therefore, the automated assembly mechanism of this example must not only be able to achieve the automated assembly action of "sliding and pushing the sealing ring 30 and the buckle 40 towards the connector 10 along the wire harness 20," but also be able to guide and maintain the spatial posture of the wire harness 20.

[0021] For ease of description, the connector 10 is defined as fixedly connected to the front end of the wire harness 20, the direction opposite to the forward direction is defined as backward, and the relative direction of the two wire harnesses 20 is defined as the left-right direction, that is, the two wire harnesses 20 are spaced apart to the left and right. Two opposite directions that are simultaneously perpendicular to the aforementioned forward-backward and left-right directions are defined as the up-down directions. The specific up, down, left, right, forward, and backward directions can also be based on the orientation of the automated assembly mechanism in this example under operating conditions.

[0022] like Figure 2As shown, the automated assembly mechanism for the connector includes a connector fixing part 1, a wire harness stabilizing part 5, and a push-fitting mechanism 4. The connector fixing part 1 is a clamp that adapts to the shape of the connector and is used to clamp and fix the connector. The wire harness stabilizing unit 5 includes a centering mechanism 2 and a straightening mechanism 3. The centering mechanism 2 is configured to clamp two wire harnesses 20 simultaneously to determine the center distance between the two wire harnesses 20. The straightening mechanism 3 is configured to pull the two wire harnesses 20 in a rearward direction away from the connector 10 to straighten the two wire harnesses 20. After centering and straightening, the spatial posture of the wire harnesses 20 is accurate and stable. Then, the push-mount mechanism 4 pushes the accessory to be assembled to slide and install it into the connector 10. This allows for automated and reliable assembly of the accessory to be assembled. Since the wire harnesses 20 are accurately positioned and kept straight, the push-mount mechanism 4 can accurately position the sealing ring 30 and the buckle 40 on the wire harnesses 20. The wire harnesses 20 will also not interfere with the position of the automated assembly mechanism, thus improving the yield of product production.

[0023] The specific structure of the centering mechanism 2 is as follows: Figure 3 , Figure 4 As shown, in the front-to-back extension direction of the wire harness 20, there are two centering mechanisms 2 spaced apart, namely the first centering mechanism 21 and the second centering mechanism 22. The first centering mechanism 21, the second centering mechanism 22 and the straightening mechanism 3 are arranged alternately from front to back. The first centering mechanism 21 and the second centering mechanism 22 have the same structure. The first centering mechanism 21 will be used as an example for explanation. The first centering mechanism 21 includes an upper clamping member 211, a lower clamping member 212, and a clamping drive mechanism 213. The lower end of the upper clamping member 211 is provided with a first V-shaped groove 201 and a second V-shaped groove 202 that are open downwards and spaced apart from left to right. The upper end of the lower clamping member 212 is provided with a third V-shaped groove 203 and a fourth V-shaped groove 204 that are open upwards and spaced apart from left to right. The first V-shaped groove 201 and the third V-shaped groove 203 are arranged vertically opposite each other and are used to clamp one of the wire harnesses 20. The second V-shaped groove 202 and the fourth V-shaped groove 204 are arranged vertically opposite each other and are used to clamp the other of the wire harnesses. The clamping drive mechanism 213 is used to drive the upper clamping member 211 and the lower clamping member 212 to close or open vertically. Since the first V-groove 201, the second V-groove 202, the third V-groove 203, and the fourth V-groove 204 all have inclined guiding surfaces, during the process of clamping one of the wire harnesses 20 with the first V-groove 201 and the third V-groove 203, the wire harness 20 can be guided to be clamped to the center position of the first V-groove 201 and the third V-groove 203. During the process of clamping the other wire harness 20 with the second V-groove 202 and the fourth V-groove 204, the wire harness 20 can be guided to be clamped to the center position of the second V-groove 202 and the fourth V-groove 204. Since the distance between the first V-groove 201 and the second V-groove 202 is fixed, the center distance between the two wire harnesses 20 is determined.

[0024] It is understandable that if only one centering mechanism 2 is set (for example, only the first centering mechanism 21 is retained), the center distance between the two wire harnesses 20 can be corrected and determined. However, in this embodiment, two centering mechanisms 2 are set at intervals, which can clamp and center the wire harnesses 20 at two different positions at the same time, so that the two wire harnesses 20 remain basically parallel, and the spatial posture of the wire harnesses 20 after being straightened is more accurate.

[0025] The centering mechanism 2 is also equipped with a first forward and backward mechanism (not shown in the figure). The first forward and backward mechanism is driven and connected to the centering mechanism 2 to drive the centering mechanism 2 to move left and right closer to or away from the wire harness 20. When the centering mechanism 2 does not need to work, the first forward and backward mechanism can drive the centering mechanism 2 away from the wire harness 20 to free up working space. When the centering mechanism 2 needs to work, the first forward and backward mechanism can drive the centering mechanism 2 closer to the wire harness 20.

[0026] The specific structure of the straightening mechanism 3 is as follows: Figure 3 , Figure 5 As shown, in this embodiment, there are two straightening mechanisms 3, namely a first straightening mechanism 31 and a second straightening mechanism 32. The first straightening mechanism 31 and the second straightening mechanism 32 are each used to tighten one wire harness 20. In other embodiments, the straightening mechanism 3 can also clamp two wire harnesses 20 simultaneously before tightening, just like a centering mechanism 2. The first straightening mechanism 31 and the second straightening mechanism 32 have the same structure. The following description uses the first straightening mechanism 31 as an example. The first straightening mechanism 31 includes a clamping member 311, a clamping drive member 312, and a pulling drive mechanism 313. The clamping member 311 is provided with an upper clamping tooth 301 and a lower clamping tooth 302 corresponding to a single wire harness 20. The clamping drive member 312 is used to drive the upper clamping tooth 301 and the lower clamping tooth 302 to close or open. When the upper clamping tooth 301 and the lower clamping tooth 302 close, the wire harness can be clamped. The pull drive mechanism 313 is connected to the clamping member 311 and is used to drive the clamping member 311 to move back and forth. Thus, after the clamping member 311 clamps the wire harness 20, the pull drive mechanism 313 drives the clamping member 311 to move backward, pulling and tightening the wire harness 20.

[0027] The straightening mechanism 3 is also equipped with a second forward and backward mechanism (not shown in the figure). The second forward and backward mechanism is driven and connected to the straightening mechanism 3 to drive the straightening mechanism 3 to move left and right closer to or away from the wire harness 20. When the straightening mechanism 3 does not need to work, the second forward and backward mechanism can drive the straightening mechanism 3 away from the wire harness 20 to free up working space. When the straightening mechanism 3 needs to work, the second forward and backward mechanism can drive the straightening mechanism 3 closer to the wire harness 20.

[0028] During automated assembly, the centering mechanism 2 is first activated to determine the center distance between the two wire harnesses 20. While the centering mechanism 2 clamps the two wire harnesses 20, the straightening mechanism 3 is activated to clamp and tighten the wire harnesses. After the straightening mechanism 3 clamps and tightens the wire harnesses, the posture of the wire harnesses 20 has been determined. At this time, the centering mechanism 2 can move away from the wire harnesses 20 to free up working space, which will facilitate the operation of the push assembly mechanism 4.

[0029] The structure of the push mechanism 4 is as follows Figure 2 , Figure 6 , Figure 7 As shown, in this embodiment, the components to be installed include a sealing ring 30 and a snap fastener 40. Therefore, two pushing mechanisms 4 are provided, namely a first pushing mechanism 41 and a second pushing mechanism 42. The first pushing mechanism 41 is used to push the sealing ring 30, and the second pushing mechanism is used to push the snap fastener 40. The structures of the first pushing mechanism 41 and the second pushing mechanism 42 are similar. Both can be fitted onto the wire harness 20 and move along the extension direction of the wire harness 20, thereby pushing the sealing ring 30 and the snap fastener 40. Taking the second push-fit mechanism 42 as an example, the second push-fit mechanism 42 includes an upper closing kit 411, a lower closing kit 412, a closing drive mechanism 413, and a push-fit drive mechanism 414. The lower end of the upper closing kit 411 is provided with a downward-opening first U-shaped groove 401, and the upper end of the lower closing kit 412 is provided with an upward-opening second U-shaped groove 402. The first U-shaped groove 401 and the second U-shaped groove 402 are arranged opposite each other vertically. The closing drive mechanism 413 is used to drive the upper closing kit 411 and the lower closing kit 412 to close or open vertically. When the upper closing kit 411 and the lower closing kit 412 close vertically, the first U-shaped groove 401 and the second U-shaped groove 402 surround the outer periphery of the wire harness 20, and the upper closing kit 411 and the lower closing kit 412 are fitted onto the wire harness 20. The push-fit drive mechanism 414 is used to drive the upper closing kit 411 and the lower closing kit 412 to move synchronously along the extension direction of the wire harness 20, thereby performing push-fit. The push-fit mechanism 4 can be simultaneously fitted onto two wire harnesses 20 to push the sealing rings 30 or buckles 40 on the two wire harnesses 20 at the same time, or multiple push-fit mechanisms 4 can be set up, with each push-fit mechanism 4 only operating on the accessories to be installed on one wire harness 20.

[0030] In this embodiment, a first pushing mechanism 41 and a second pushing mechanism 42 are provided. The first pushing mechanism 41 is used to push the sealing ring 30, and the second pushing mechanism is used to push the buckle 40. However, there may only be one pushing mechanism 4, and one pushing mechanism 4 can push the sealing ring 30 and the buckle 40 in sequence. The pushing mechanism 4 can be adaptively optimized according to the parts to be assembled. For example, the front top surface of the pushing mechanism 4 can be designed to adapt to the rear end surface of the parts to be assembled, so that the process of pushing the parts to be assembled by the pushing mechanism 4 is more stable. The pushing mechanism 4 is also equipped with a third advancing and retreating mechanism (not shown in the figure). The third advancing and retreating mechanism is driven and connected to the pushing mechanism 4 to drive the pushing mechanism 4 to move left and right closer to or away from the wire harness 20. When the pushing mechanism 4 does not need to work, the third advancing and retreating mechanism can drive the pushing mechanism 4 away from the wire harness 20 to free up working space. When the pushing mechanism 4 needs to work, the third advancing and retreating mechanism can drive the pushing mechanism 4 closer to the wire harness 20.

[0031] The aforementioned clamping drive mechanism 213, clamping drive component 312, pulling drive mechanism 313, assembling drive mechanism 413, pushing drive mechanism 414, first advancing and retreating mechanism, second advancing and retreating mechanism, and third advancing and retreating mechanism can be implemented using various automatic drive mechanisms such as cylinders, hydraulic cylinders, and motors, which is understandable to those skilled in the art.

[0032] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. An automated assembly mechanism for connectors, used for assembling connectors, the connector comprising a plug and two spaced-apart wire harnesses, one end of each wire harness being plugged into and fixed in the plug, and at least one assembly part being slidably disposed on the wire harness, characterized in that: The automated assembly mechanism for connectors includes a connector fixing part, a wire harness stabilizing part, and a push-fit mechanism. The connector fixing part is a clamp adapted to the shape of the connector for clamping and fixing the connector. The wire harness stabilizing part includes a centering mechanism and a straightening mechanism. The centering mechanism is configured to clamp two wire harnesses simultaneously to determine the center distance between the two wire harnesses. The straightening mechanism is configured to pull the two wire harnesses away from the connector to straighten them. The push-fit mechanism is used to push the connector to be assembled so that it slides into the connector.

2. The automated assembly mechanism for connectors according to claim 1, characterized in that: The centering mechanism has two spaced-apart parts along the extension direction of the wire harness.

3. The automated assembly mechanism for connectors according to claim 2, characterized in that: The two centering mechanisms are the first centering mechanism and the second centering mechanism. The connector is located at the front end of the wire harness. The first centering mechanism, the second centering mechanism, and the straightening mechanism are arranged alternately from front to back.

4. The automated assembly mechanism for connectors according to claim 1, characterized in that: The centering mechanism includes an upper clamping component, a lower clamping component, and a clamping drive mechanism. The lower end of the upper clamping component is provided with a first V-shaped groove and a second V-shaped groove that are open downwards and spaced apart from left to right. The upper end of the lower clamping component is provided with a third V-shaped groove and a fourth V-shaped groove that are open upwards and spaced apart from left to right. The first V-shaped groove and the third V-shaped groove are arranged vertically opposite each other and are used to clamp one of the wire harnesses. The second V-shaped groove and the fourth V-shaped groove are arranged vertically opposite each other and are used to clamp the other of the wire harnesses. The clamping drive mechanism is used to drive the upper clamping component and the lower clamping component to close or open vertically.

5. The automated assembly mechanism for connectors according to claim 1, characterized in that: The straightening mechanism includes a clamping member and a pulling drive mechanism. The clamping member is used to clamp the wire harness, and a connector is defined at the front end of the wire harness. The pulling drive mechanism is connected to the clamping member and is used to drive the clamping member to move back and forth.

6. The automated assembly mechanism for connectors according to claim 5, characterized in that: The relative direction of the two wire harnesses is defined as the left and right direction. There are two straightening mechanisms that are opposite each other, and each of the two straightening mechanisms is used to tighten one of the wire harnesses.

7. The automated assembly mechanism for connectors according to claim 5, characterized in that: The straightening mechanism also includes a clamping drive; for each wire harness, the clamping drive is provided with upper clamping teeth and lower clamping teeth, and the clamping drive is used to drive the upper clamping teeth and lower clamping teeth to close or open.

8. The automated assembly mechanism for connectors according to claim 1, characterized in that: It also includes a first advancing / retreating mechanism, a second advancing / retreating mechanism, and a third advancing / retreating mechanism. The relative direction of the two wire harnesses is defined as the left and right direction. The first advancing / retreating mechanism is driven and connected to the centering mechanism to drive the centering mechanism to move left and right closer to or away from the wire harness. The second advancing / retreating mechanism is driven and connected to the straightening mechanism to drive the straightening mechanism to move left and right closer to or away from the wire harness. The third advancing / retreating mechanism is driven and connected to the pushing mechanism to drive the pushing mechanism to move left and right closer to or away from the wire harness.

9. The automated assembly mechanism for connectors according to claim 1, characterized in that: The push-fit mechanism is configured to fit onto the wire harness and move along the extension direction of the wire harness. The push-fit mechanism includes an upper fitting kit, a lower fitting kit, a fitting drive mechanism, and a push-fit drive mechanism. The lower end of the upper fitting kit is provided with a downward-opening first U-shaped groove, and the upper end of the lower fitting kit is provided with an upward-opening second U-shaped groove. The first U-shaped groove and the second U-shaped groove are arranged vertically opposite each other. The fitting drive mechanism is used to drive the upper fitting kit and the lower fitting kit to close or open vertically, and the push-fit drive mechanism is used to drive the upper fitting kit and the lower fitting kit to move along the extension direction of the wire harness.

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