Wire feeding device

Abstract

The utility model discloses a wire feeding device, which relates to the technical field of coating equipment and comprises a mounting plate, two wire feeding mechanisms and a driving device. The mounting plate is provided with a first mounting surface and a second mounting surface which are oppositely arranged along a second direction; the two wire feeding mechanisms are both arranged on the first installation face and are oppositely arranged, each wire feeding mechanism comprises a wire feeding base, a wire feeding wheel and a wire pressing assembly, installation grooves are formed in the side faces, facing each other, of the two wire feeding bases, the corresponding wire feeding wheels are rotationally installed in the installation grooves, the two wire feeding wheels are oppositely and coaxially arranged in the first direction, and the wire pressing assemblies are arranged on the wire feeding bases. Each wire pressing assembly is mounted on the wire feeding seat and is used for pressing and conveying wires together with the corresponding wire feeding wheel; the driving device comprises a driving piece and a transmission assembly, the driving piece is installed on the second installation face, and the transmission assembly drives the two wire feeding wheels to move synchronously. According to the technical scheme provided by the utility model, the installation requirement of a narrow space is met, and the synchronism of wire feeding can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, and particularly relates to a wire feeding device. Background Art

[0002] During the coating process, the wire feeding device pulls the wire on the wire reel and sends the end of the wire into the evaporation device for evaporation. To ensure the stability of wire feeding, a single motor is used to drive a single wire feeding device, resulting in a relatively large volume of a single wire feeding device. At the same time, since the evaporation system generally requires multiple or dozens of wire feeding mechanisms, the overall occupied space is large, which cannot meet the installation requirements of narrow spaces. Moreover, the wire feeding rates of each wire feeding device cannot be exactly the same, and the synchronization decreases as the number of wire feeding mechanisms increases. Summary of the Utility Model

[0003] The main object of the utility model is to propose a wire feeding device, aiming to meet the wire feeding requirements of narrow spaces and maintain the synchronization of dual-path wire feeding.

[0004] To achieve the above object, the wire feeding device proposed by the utility model includes a mounting plate, two wire feeding mechanisms, and a driving device; the mounting plate has a first mounting surface and a second mounting surface that are oppositely arranged along a second direction; the two wire feeding mechanisms are both arranged on the first mounting surface and are oppositely arranged. Each wire feeding mechanism includes a wire feeding seat, a wire feeding wheel, and a wire pressing component. Installation grooves are provided on the side surfaces of the two wire feeding seats facing each other, and the installation grooves are used for the corresponding wire feeding wheels to be rotatably installed. The two wire feeding wheels are opposite to each other and coaxial along a first direction. Each wire pressing component is installed on the wire feeding seat to press and convey the wire together with the corresponding wire feeding wheel; the driving device includes a driving member and a transmission component. The driving member is installed on the second mounting surface and drives the two wire feeding wheels to move synchronously through the transmission component.

[0005] In an embodiment, the transmission component includes a synchronous shaft and a synchronous belt; the synchronous shaft extends along the first direction, and its two ends are rotatably installed on the opposite groove walls of the two installation grooves. The two wire feeding wheels are both installed on the synchronous shaft; the synchronous belt passes through the mounting plate to drive-connect the driving member and the synchronous shaft.

[0006] In an embodiment, the wire feeding device further includes a support column. The support column extends along the first direction, and the two ends of the support column are respectively fixedly connected to the two wire feeding seats.

[0007] In an embodiment, the wire pressing component includes a pressing rod, an elastic member, and a wire pressing wheel; one end of the pressing rod is rotatably installed on the wire feeding seat, and the other end extends to the corresponding installation groove. An installation shaft is provided at the corresponding position of the installation groove. The wire pressing wheel is rotatably arranged on the installation shaft and abuts against the wire feeding wheel to jointly press the wire; the two ends of the elastic member are respectively fixedly connected to the pressing rod and the wire feeding seat and are in a stretched state to pull the wire pressing wheel closer to the wire feeding wheel.

[0008] In one embodiment, the wire pressing assembly further includes a pressure rod bolt, which passes through the other end or the middle position of the pressure rod and is screwed to the wire feeding seat. By rotating the pressure rod bolt, the distance between the pressure rod and the wire feeding seat can be adjusted.

[0009] In one embodiment, at least part of the surface of the wire feeding wheel and / or the wire pressing wheel is serrated.

[0010] In one embodiment, the wire feeding mechanism further includes a feeding pipe, a discharging pipe and a guiding pipe; the outlet end of the feeding pipe faces the contact position of the wire feeding wheel and the wire pressing wheel; the inlet end of the discharging pipe is arranged opposite to the outlet end of the feeding pipe and faces the contact position of the wire feeding wheel and the wire pressing wheel; the guiding pipe includes a feeding guiding pipe and a discharging guiding pipe. One end of the feeding guiding pipe is arranged close to the contact position of the wire feeding wheel and the wire pressing wheel, and the other end is close to the feeding pipe. One end of the discharging guiding pipe is arranged close to the contact position of the wire feeding wheel and the wire pressing wheel, and the other end is close to the discharging pipe; the wire passes through the feeding pipe, the feeding guiding pipe, the wire feeding wheel and the wire pressing wheel, the discharging guiding pipe and the discharging pipe in sequence.

[0011] In one embodiment, at least part of the discharging pipe is arc-shaped.

[0012] In one embodiment, an insulating pad is arranged between the wire feeding seat and the mounting plate.

[0013] In one embodiment, an insulating sleeve is embedded in the mounting plate, and the screw member passes through the wire feeding seat, the insulating pad and the insulating sleeve and is fixedly connected to the mounting plate.

[0014] In the technical solution of the present utility model, the two wire feeding mechanisms and the driving device are respectively arranged on two sides of the mounting plate, thereby reducing the thickness of the two wire feeding mechanisms arranged side by side, and being more suitable for the installation requirements of narrow spaces. One driving member uses a transmission assembly to drive the two wire feeding mechanisms, further reducing the space occupied by the driving device, and being able to drive the two wire feeding wheels to move synchronously, ensuring the synchronism of wire feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0016] Figure 1 FIG. is a schematic structural diagram of an embodiment of the wire feeding device provided by the present utility model;

[0017] Figure 2 is Figure 1 a schematic structural diagram of the transmission assembly in

[0018] Figure 3 is Figure 1 A side view schematic diagram of the wire feeding device in

[0019] Figure 4 is Figure 1 A structural schematic diagram of the mounting plate in

[0020] Explanation of the reference numerals in the drawings:

[0021] 1000, wire feeding device; 1, mounting plate; 2, wire feeding mechanism; 21, wire feeding seat; 212, mounting groove; 22, wire feeding wheel; 23, wire pressing assembly; 231, pressing rod; 232, wire pressing wheel; 233, elastic member; 234, pressing rod bolt; 24, feed pipe; 25, discharge pipe; 261, feed guiding pipe; 262, discharge guiding pipe; 3, driving device; 31, driving member; 32, transmission assembly; 321, synchronous shaft; 321A, bearing; 322, synchronous belt; 323, synchronous belt pulley; 4, support column; 5, insulating pad; 6, insulating sleeve.

[0022] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. The present utility model provides a wire feeding device 1000.

[0026] Please refer to Figure 1 and Figure 2 , in an embodiment of the present utility model, the wire feeding device 1000 includes a mounting plate 1, two wire feeding mechanisms 2, and a driving device 3; taking the installation direction of the two wire feeding mechanisms 2 as the first direction and the thickness direction of the mounting plate 1 as the second direction, the mounting plate 1 has a first mounting surface and a second mounting surface oppositely arranged along the second direction; the two wire feeding mechanisms 2 are both arranged on the first mounting surface and are oppositely arranged. Each wire feeding mechanism 2 includes a wire feeding seat 21, a wire feeding wheel 22, and a wire pressing assembly 23. Installation grooves 212 are provided on the side surfaces of the two wire feeding seats 21 facing each other, and the installation grooves 212 are used for the corresponding wire feeding wheels 22 to be rotatably installed. The two wire feeding wheels 22 are opposite and coaxial along the first direction. Each wire pressing assembly 23 is installed on the wire feeding seat 21 to press and convey the wire with the corresponding wire feeding wheel 22; the driving device 3 includes a driving member 31 and a transmission assembly 32. The driving member 31 is installed on the second mounting surface and drives the two wire feeding wheels 22 to move synchronously through the transmission assembly 32.

[0027] The technical solution of the present utility model reduces the thickness of the two wire feeding mechanisms 2 arranged in parallel by arranging the two wire feeding mechanisms 2 and the driving device 3 on two sides of the mounting plate 1, which better meets the installation requirements of narrow spaces. One driving member 31 uses the transmission assembly 32 to drive the two wire feeding mechanisms 2, further reducing the space occupied by the driving device 3 and being able to drive the two wire feeding wheels 22 to move synchronously, ensuring the synchronism of wire feeding.

[0028] Specifically, the driving member 31 is a servo motor, which realizes the closed-loop control of position, speed, and torque, can improve the accuracy of the wire feeding speed, and avoid the problem of wire feeding jamming caused by out-of-step; the wire feeding seat 21 is a plate-like structure extending along the second direction to reduce the thickness of the wire feeding seat 21 and better meet the installation requirements of narrow spaces.

[0029] Please refer to Figure 2 In an embodiment of the present utility model, the transmission assembly 32 includes a synchronous shaft 321 and a synchronous belt 322; the synchronous shaft 321 extends along the first direction, and its two ends are rotatably installed on the opposite groove walls of the two installation grooves 212, and the two wire feeding wheels 22 are both installed on the synchronous shaft 321; the synchronous belt 322 passes through the mounting plate 1 to drivingly connect the driving member 31 and the synchronous shaft 321. By installing the two wire feeding wheels 22 on the synchronous shaft 321, when the synchronous shaft 321 is driven to rotate, the two wire feeding wheels 22 both rotate following the synchronous shaft 321, so that the two wire feeding wheels 22 move synchronously, that is, the synchronous belt 322 can effectively transmit the power output by the driving member 31 to the synchronous shaft 321 synchronously. As long as the rotational speeds of the motors are determined to be the same, the wire feeding rates can also be guaranteed to be the same during the simultaneous operation of the two wire feeding mechanisms 2; at the same time, the synchronous belt 322 can pass through the mounting plate 1 to drivingly connect the driving member 31 and the synchronous shaft 321, so that the driving member 31 located on the second mounting surface can drive the wire feeding wheel 22 on one side of the first mounting surface; and the synchronous belt 322 is made of an insulating material, which can effectively ensure the insulation between the driving member 31 and the wire feeding mechanism 2, thereby eliminating the influence of current on the subsequent evaporation device and ensuring the stability of the subsequent evaporation device.

[0030] Specifically, bearings 321A are provided at the installation positions of the installation grooves 212 for installing the synchronous shaft 321 to rotatably install the synchronous shaft 321 on the opposite groove walls of the two installation grooves 212. The bearings 321A are used to support the synchronous shaft 321 so that it can rotate freely without being affected.

[0031] Specifically, the transmission assembly 32 further includes two synchronous belt pulleys 323. The two synchronous belt pulleys 323 are respectively sleeved on the drive shaft of the driving member 31 and the synchronous shaft 321, and the synchronous belt 322 is sleeved on the outer surfaces of the two synchronous belt pulleys 323 to form a synchronous belt 322 structure.

[0032] In another embodiment of the present utility model, the transmission assembly 32 includes a synchronous shaft 321 and a worm and worm gear set. The synchronous shaft 321 extends along the first direction, and its two ends are rotatably installed on the opposite groove walls of the two installation grooves 212, and the two wire feeding wheels 22 are both installed on the synchronous shaft 321; the worm of the worm and worm gear set is connected to the driving member 31, and the worm gear is sleeved on the synchronous shaft 321 to drive the synchronous shaft 321 to rotate. The worm passes through the mounting plate 1 and meshes with the worm, and an insulating coating is applied on the surface of the worm and worm gear to isolate the current.

[0033] Please refer to Figure 1, in an embodiment of the present utility model, the wire feeding device 1000 further includes a support column 4. The support column 4 extends along the first direction, and both ends of the support column 4 are fixedly connected to the two wire feeding seats 21 respectively. In this way, the two wire feeding seats 21 are fixed, enhancing the relative stability between the two wire feeding seats 21, preventing relative displacement between them from affecting the wire feeding synchronism, and ensuring the stability of wire feeding.

[0034] Specifically, the fixed connection is welding, bolt connection or riveting; the shape of the support column 4 is preferably cylindrical. It is easy to understand that the support column 4 can be replaced with a block or other shapes as long as it can stably connect the two wire feeding seats 21 and prevent them from shaking.

[0035] Please refer to Figure 3 , in an embodiment of the present utility model, the wire pressing assembly 23 includes a pressing rod 231, an elastic member 233 and a wire pressing wheel 232; one end of the pressing rod 231 is rotatably installed on the wire feeding seat 21, and the other end extends to the corresponding installation groove 212, and an installation shaft is provided at the corresponding position of the installation groove 212; the wire pressing wheel 232 is rotatably arranged on the installation shaft and abuts against the wire feeding wheel 22 to jointly press the wire; both ends of the elastic member 233 are fixedly connected to the pressing rod 231 and the wire feeding seat 21 respectively and are in a stretched state to pull the wire pressing wheel 232 closer to the wire feeding wheel 22. In the no-load state, the other end of the pressing rod 231 approaches the wire feeding seat 21 under the action of the elastic member 233, thereby driving the wire pressing wheel 232 to abut against the wire feeding wheel 22; in the feeding state, the wire feeding wheel 22 rotates, and the wire is clamped between the wire pressing wheel 232 and the wire feeding wheel 22 from the side where the wire pressing wheel 232 abuts against the wire feeding wheel 22. The other end of the pressing rod 231 approaches the wire feeding seat 21 under the action of the elastic member 233, thereby squeezing the wire, so that the wire is stably sent out from the other side where the wire pressing wheel 232 abuts against the wire feeding wheel 22; it is compatible with wires of various diameters and can enhance the stability of wire feeding. Specifically, the elastic member 233 is a spring or a composite material elastic member 233.

[0036] In an embodiment of the present utility model, the wire pressing assembly 23 further includes a pressing rod bolt 234. The pressing rod bolt 234 passes through the other end or the middle position of the pressing rod 231 and is screwed to the wire feeding seat 21. By rotating the pressing rod bolt 234, the distance between the pressing rod 231 and the wire feeding seat 21 can be adjusted. By adjusting the distance between the pressing rod 231 and the wire feeding seat 21 through the pressing rod bolt 234, the distance between the wire pressing wheel 232 and the wire feeding wheel 22 and the pressing force on the wire can be adjusted.

[0037] In an embodiment of the present utility model, at least a part of the surface of the wire feeding wheel 22 and / or the wire pressing wheel 232 is serrated to prevent slipping and affecting the wire conveying efficiency.

[0038] In an embodiment of the present utility model, the wire feeding mechanism 2 further includes a feeding pipe 24, a discharging pipe 25 and a guiding pipe; the outlet end of the feeding pipe 24 faces the abutting position of the wire feeding wheel 22 and the wire pressing wheel 232; the inlet end of the discharging pipe 25 is arranged opposite to the outlet end of the feeding pipe 24 and faces the abutting position of the wire feeding wheel 22 and the wire pressing wheel 232; the guiding pipe includes a feeding guiding pipe 261 and a discharging guiding pipe 262, one end of the feeding guiding pipe 261 is arranged close to the abutting position of the wire feeding wheel 22 and the wire pressing wheel 232, and the other end is close to the feeding pipe 24, one end of the discharging guiding pipe 262 is arranged close to the abutting position of the wire feeding wheel 22 and the wire pressing wheel 232, and the other end is close to the discharging pipe 25; the wire sequentially passes through the feeding pipe 24, the feeding guiding pipe 261, between the wire feeding wheel 22 and the wire pressing wheel 232, the discharging guiding pipe 262 and the discharging pipe 25. The feeding pipe 24 is used for feeding the wire into the wire feeding mechanism 2, the feeding guiding pipe 261 receives the wire entering from the feeding pipe 24 and guides the wire between the wire feeding wheel 22 and the wire pressing wheel 232, the wire passes through between the wire feeding wheel 22 and the wire pressing wheel 232 and enters the discharging guiding pipe 262, and the discharging guiding pipe 262 guides the wire to the discharging pipe 25 for discharging towards the next device.

[0039] Specifically, the feeding pipe 24 is set as a flexible pipe, such as a rubber hose. Since the wire is usually wound on a wire feeding disc (a storage device for the wire), the wire feeding disc has a certain width. On a relatively wide wire feeding disc, the wires near both sides of the wire feeding disc will generate opposite forces when entering the wire feeding device 1000, causing the wire to move left and right. Setting the feeding pipe 24 as a flexible pipe can effectively reduce the reaction force generated by the wire, thereby reducing the left and right movement of the wire in the wire feeding mechanism 2.

[0040] Specifically, the discharging pipe 25 is set as a rigid pipe, such as a PE pipe, so that the fed wire is aligned with the evaporation device; the discharging guiding pipe 262 is close to the discharging pipe 25 to ensure that the wire will not move left and right when passing through.

[0041] Specifically, two corresponding through holes are penetrated at the corresponding positions on the wire feeding seat 21 where the wire feeding wheel 22 and the wire pressing wheel 232 abut, for the feeding pipe 24 and the discharging pipe 25 to pass through.

[0042] In an embodiment of the present utility model, at least a part of the discharging pipe 25 is arranged in an arc shape. Ensure that the wire can reach the middle of the evaporation device after passing through the discharging pipe 25.

[0043] Please refer to Figure 4 , in an embodiment of the present utility model, an insulating pad 5 is arranged between the wire feeding seat 21 and the mounting plate 1. Prevent the current from affecting the wire feeding mechanism 2.

[0044] In an embodiment of the present utility model, an insulating sleeve 6 is embedded in the mounting plate 1, and a screw member passes through the wire feeding seat 21, the insulating pad 5 and the insulating sleeve 6 to be fixedly connected to the mounting plate 1, so as to fixedly connect the mounting plate 1 and the wire feeding seat 21 while preventing the current from affecting the wire feeding mechanism 2.

[0045] In an embodiment of the present utility model, the specific working process of the device is as follows:

[0046] First step, adjust the pressure lever bolt 234 according to the diameter of the wire 24, and adjust the distance between the pressure lever 231 and the wire feeding seat 21 so that the wire can be squeezed between the wire pressing wheel 232 and the wire feeding wheel 22;

[0047] Second step, insert the wire 24 into the feeding pipe 24, and the end of the wire reaches the abutting position of the wire pressing wheel 232 and the wire feeding wheel 22 after passing through the feeding guide pipe 261;

[0048] Third step, start the driving member 31, and it synchronously drives the wire feeding wheel 22 through the synchronous belt 322. The wire 24 is wound under the action of the wire feeding wheel 22, and successively passes through the discharging guide pipe 262 and the discharging pipe 25, and is conveyed to the evaporation device.

[0049] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural transformations made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present utility model.

Claims

1. A wire feeding device, characterized in that: include: The mounting plate has a first mounting surface and a second mounting surface which are arranged opposite to each other along a second direction; Two wire feeding mechanisms are both arranged on the first mounting surface, and the two wire feeding mechanisms are arranged opposite to each other, each of the wire feeding mechanisms comprises a wire feeding seat, a wire feeding wheel and a wire pressing assembly, the two wire feeding seats are provided with mounting grooves on the sides facing each other, the mounting grooves are used for the corresponding wire feeding wheels to be rotatably mounted, the two wire feeding wheels are arranged opposite to each other and coaxially along a first direction, and each wire pressing assembly is installed on the corresponding wire feeding seat to press and convey the wire with the corresponding wire feeding wheel; as well as, The driving device comprises a driving member and a transmission assembly. The driving member is mounted on the second mounting surface and drives the two wire feeding wheels to move synchronously through the transmission assembly.

2. The wire feeding device according to claim 1, characterized in that: The transmission assembly comprises: A synchronous shaft extends along a first direction, with two ends thereof rotatably mounted on opposite groove walls of the two mounting grooves, and the two wire feeding wheels are both mounted on the synchronous shaft; and, A synchronous belt passes through the mounting plate to drive and connect the driving member to the synchronous shaft.

3. The wire feeding device according to claim 1, characterized in that: The wire feeding device also includes a support column, which extends along a first direction, and two ends of the support column are respectively fixedly connected to two wire feeding seats.

4. The wire feeding device according to claim 1, characterized in that: The wire pressing assembly comprises: A pressure rod, one end of which is rotatably mounted on the wire feeding seat, and the other end of which extends to the corresponding mounting groove, and a mounting shaft is provided at a position corresponding to the mounting groove; a wire pressing wheel, rotatably disposed on the mounting shaft and abutting against the wire feeding wheel to jointly press the wire; and The elastic member has two ends respectively fixedly connected to the pressure rod and the wire feeding seat and is in a stretched state, so as to pull the wire pressing wheel closer to the wire feeding wheel.

5. The wire feeding device according to claim 4, characterized in that: The wire pressing assembly also includes a pressure rod bolt, which passes through the other end of the pressure rod or the middle position of the pressure rod and is spirally connected to the wire feeding seat. The distance between the pressure rod and the wire feeding seat can be adjusted by rotating the pressure rod bolt.

6. The wire feeding device according to claim 4, characterized in that: The surface of the wire feeding wheel and / or the wire pressing wheel is at least partially arranged in a serrated shape.

7. The wire feeding device according to claim 4, characterized in that: The wire feeding mechanism also includes: A feed pipe, the outlet end of which faces the abutment between the wire feeding wheel and the wire pressing wheel; a discharge pipe, the inlet end of which is arranged opposite to the outlet end of the feed pipe and faces the abutment between the wire feeding wheel and the wire pressing wheel; and A guide tube, comprising a feed guide tube and a discharge guide tube, wherein one end of the feed guide tube is arranged near the abutment between the wire feeding wheel and the wire pressing wheel, and the other end is arranged near the feed tube, and one end of the discharge guide tube is arranged near the abutment between the wire feeding wheel and the wire pressing wheel, and the other end is arranged near the discharge tube; Among them, the wire passes through the feed pipe, the feed guide pipe, the wire feeding wheel and the wire pressing wheel, the discharge guide pipe and the discharge pipe in sequence.

8. The wire feeding device according to claim 7, characterized in that: At least a portion of the discharge pipe is arranged in an arc shape.

9. The wire feeding device according to claim 1, characterized in that: An insulating pad is arranged between the wire feeding seat and the mounting plate.

10. The wire feeding device according to claim 9, characterized in that: An insulating sleeve is embedded in the mounting plate, and a threaded connection piece passes through the wire feed seat, the insulating pad and the insulating sleeve and is fixedly connected to the mounting plate.

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