Tool equipment for installing stator

Abstract

The utility model belongs to the technical field of stator processing, and particularly relates to tool equipment for installing a stator, which comprises a base. The side wall of the base is fixedly connected with a servo motor; an open groove is formed in the side wall of the base; the output end of the servo motor is fixedly connected with a two-way screw rod; the stator is arranged between the first clamping plate and the second clamping plate, then the servo motor is started, the first clamping plate and the second clamping plate get close to each other at the moment, the stator is pre-fixed, and then the stator can be clamped through the first clamping plate and the second clamping plate; a first connecting block and a second connecting block are driven to move through a two-way screw rod, the clamping and fixing effects on stators of different sizes can be achieved, the flexibility of adjusting the distance between a first clamping plate and a second clamping plate is improved, meanwhile, a cushion block is pushed through a first spring rod, the clamping and fixing effects on the stators can be improved, and the practicability is high. And the condition that the stator slides on the side walls of the first clamping plate and the second clamping plate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of stator processing, and specifically relates to a tooling device for installing a stator. Background Technique

[0002] A stator refers to a main component in an electric motor. It is one of the core parts of the motor and is usually fixed on the outer shell of the motor. The stator mainly consists of an iron core and windings. The iron core is used to concentrate and guide the magnetic field, while the windings generate a magnetic field through the flow of electric current.

[0003] In the prior art, when installing a stator, it is first necessary to clamp and fix the stator through a fixture to keep it stable. The fixture mainly consists of a base and a clamping mechanism. During use, the stator is placed in the middle of the clamping mechanism, and then the clamping mechanism is operated to clamp and fix the stator.

[0004] However, in the prior art, it is found that during the process of clamping the stator through the fixture, due to the difficulty of adjusting the existing fixture, the adjustment is rather cumbersome, resulting in difficulty in clamping and fixing stators of different sizes, thus having a certain impact on the use effect of the fixture. Therefore, a tooling device for installing a stator is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background technique, the utility model proposes a tooling device for installing a stator.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: A tooling device for installing a stator according to the utility model includes a base; a servo motor is fixedly connected to the side wall of the base; a slot is opened on the side wall of the base; a bidirectional screw is fixedly connected to the output end of the servo motor; a first connecting block is threadedly connected to the side wall of the bidirectional screw; a first clamping plate is provided on the side wall of the first connecting block; a second connecting block is threadedly connected to the side wall of the bidirectional screw; a second clamping plate is provided on the side wall of the second connecting block; the first connecting block and the second connecting block are in sliding fit with the slot; rubber blocks are provided on the side walls of the first clamping plate and the second clamping plate; a plurality of grooves are opened on the side walls of the rubber blocks; the grooves are evenly distributed on the side walls of the rubber blocks and have the same structure; a first spring rod is fixedly connected to the side wall of the groove; a cushion block is fixedly connected to the end of the first spring rod. By driving the first connecting block and the second connecting block to move through the bidirectional screw, the clamping and fixing of stators of different sizes can be achieved, and the flexibility of adjusting the distance between the first clamping plate and the second clamping plate can be improved.

[0007] Preferably, a first rotating shaft is rotatably connected to the side wall of the first connecting block; the first rotating shaft is fixedly connected to the first clamping plate; a fixing plate is fixedly connected to the side wall of the first connecting block; a plurality of jacks are evenly formed in the side wall of the fixing plate; a rotating disc is rotatably connected to the side wall of the first connecting block; the rotating disc penetrates through the wall of the first connecting block and is rotatably connected thereto; the rotating disc is fixedly connected to the first rotating shaft; a spring is fixedly connected to the side wall of the rotating disc; a plug rod is fixedly connected to the end of the spring; a pull rod is fixedly connected to the side wall of the plug rod; the pull rod penetrates through the wall of the rotating disc and is slidably connected thereto; a second rotating shaft is rotatably connected to the side wall of the second connecting block; the second rotating shaft is fixedly connected to the second clamping plate; by rotating the rotating disc to make the stator rotate, the angle adjustment function during the installation of the stator can be achieved, and the flexibility during the installation of the stator can be improved.

[0008] Preferably, a second spring rod is fixedly connected to the side wall of the second connecting block; a control switch is fixedly connected to the side wall of the base; a top plate is hinged to the side wall of the control switch; a light supplement plate is arranged on the side wall of the base; by providing the light supplement plate, the lighting function during the clamping and installation of the stator can be achieved, and the accuracy during the installation of the stator can be improved.

[0009] Preferably, a sliding cylinder is fixedly connected to the side wall of the base; a rubber ring is fixedly connected to the inner side wall of the sliding cylinder; a sliding rod is slidably connected to the side wall of the rubber ring; the sliding rod is fixedly connected to the light supplement plate; by sliding the sliding rod in the sliding cylinder, the height adjustment function of the light supplement plate during use can be achieved, and the flexibility of the light supplement plate during use can be improved.

[0010] Preferably, sliding grooves are formed in the side walls of the first clamping plate and the second clamping plate; a plug block is slidably connected to the side wall of the sliding groove; a rubber pad is fixedly connected to the side wall of the plug block; the plug block is fixedly connected to the rubber block; by inserting the plug block into the sliding groove for fixation, the convenience of disassembling and installing the rubber block can be achieved, and the convenience of disassembling and replacing the rubber block when it is damaged can be improved.

[0011] Preferably, a clamping groove is formed in the side wall of the pull rod; a plurality of anti-slip strips are evenly fixedly connected to the side wall of the clamping groove; by providing the clamping groove and the anti-slip strips, the anti-dropping function of the hand when holding and pulling the pull rod can be achieved, and the firmness of the hand on the side wall of the pull rod can be improved.

[0012] Preferably, a plurality of elastic sheets are evenly fixedly connected to the side wall of the plug rod; by providing the elastic sheets, the anti-dropping function of the plug rod on the side wall of the jack can be increased, and the fixing effect on the plug rod can be improved.

[0013] The beneficial effects of the present utility model:

[0014] 1. The utility model provides a stator installation tooling device. By setting a servo motor and a first spring rod, the first connecting block and the second connecting block are driven to move by a bidirectional screw, which can play a role in clamping and fixing stators of different sizes, improve the flexibility when adjusting the distance between the first clamping plate and the second clamping plate. At the same time, by pushing the cushion block with the first spring rod, the clamping and fixing effect on the stator can be improved, and the situation of the stator sliding on the side walls of the first clamping plate and the second clamping plate can be reduced.

[0015] 2. The utility model provides a stator installation tooling device. By setting a turntable, the stator is rotated by rotating the turntable, which can play a role in adjusting the angle during the stator installation, improve the flexibility during the stator installation. At the same time, through a plurality of jacks, the multi-gear adjustment effect during the stator rotation can be improved. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the utility model, form a part of this application, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation to the utility model. In the drawings:

[0017] Figure 1 is the three-dimensional view of the utility model;

[0018] Figure 2 is the three-dimensional view of the second spring rod in the utility model;

[0019] Figure 3 is the three-dimensional view of the fixed disk in the utility model;

[0020] Figure 4 is Figure 3 the partial enlarged view at A in;

[0021] Figure 5 is the three-dimensional view of the elastic sheet in the utility model;

[0022] Figure 6 is the three-dimensional view of the slide bar in the utility model.

[0023] Legend Explanation:

[0024] 1. Base; 11. Servo motor; 12. Bi-directional screw; 13. First connecting block; 14. First clamping plate; 15. Second connecting block; 16. Second clamping plate; 17. Rubber block; 18. Groove; 19. First spring rod; 110. Cushion block; 2. First rotating shaft; 21. Fixed disk; 22. Jack; 23. Turntable; 24. Spring; 25. Plug rod; 26. Pull rod; 27. Second rotating shaft; 3. Second spring rod; 31. Control switch; 32. Top plate; 33. Light supplement plate; 4. Slide cylinder; 41. Rubber ring; 42. Slide rod; 5. Slide groove; 51. Plug block; 52. Rubber pad; 6. Card slot; 61. Anti-slip strip; 7. Elastic sheet. Detailed implementation manner

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The following gives specific embodiments.

[0027] Please refer to Figures 1 - 6, the present utility model provides a tooling device for installing a stator, including a base 1; a servo motor 11 is fixedly connected to the side wall of the base 1; a slot is opened on the side wall of the base 1; the output end of the servo motor 11 is fixedly connected to a bidirectional screw 12; a first connecting block 13 is threadedly connected to the side wall of the bidirectional screw 12; a first clamping plate 14 is provided on the side wall of the first connecting block 13; a second connecting block 15 is threadedly connected to the side wall of the bidirectional screw 12; a second clamping plate 16 is provided on the side wall of the second connecting block 15; the first connecting block 13, the second connecting block 15 and the slot are in sliding fit; rubber blocks 17 are provided on the side walls of the first clamping plate 14 and the second clamping plate 16; a plurality of grooves 18 are opened on the side wall of the rubber block 17; the grooves 18 are evenly distributed on the side wall of the rubber block 17 and have the same structure; a first spring rod 19 is fixedly connected to the side wall of the groove 18; a cushion block 110 is fixedly connected to the end of the first spring rod 19; when in use, by placing the stator in the middle of the first clamping plate 14 and the second clamping plate 16, and then starting the servo motor 11, the bidirectional screw 12 is driven to rotate by the servo motor 11. As the bidirectional screw 12 rotates, the first connecting block 13 and the second connecting block 15 can move in opposite directions. The first connecting block 13 and the second connecting block 15 can slide in the slot, moving closer to or away from each other. At this time, when the first clamping plate 14 and the second clamping plate 16 move closer to each other, the cushion block 110 first contacts the surface of the stator. Through extrusion, the first spring rod 19 performs a telescopic movement. At the same time, the first spring rod 19 can also exert a certain reaction force on the cushion block 110 to pre-fix the stator. Then, the first clamping plate 14 and the second clamping plate 16 can clamp the stator. Through clamping, the rubber block 17 contacts the side wall of the stator and generates a certain frictional force to reduce the sliding of the stator between the first clamping plate 14 and the second clamping plate 16, thereby clamping and fixing the stator. In this process, by driving the first connecting block 13 and the second connecting block 15 to move through the bidirectional screw 12, it can play a role in clamping and fixing stators of different sizes, improving the flexibility when adjusting the distance between the first clamping plate 14 and the second clamping plate 16. At the same time, by pushing the cushion block 110 through the first spring rod 19, it can improve the clamping and fixing effect of the stator and reduce the occurrence of the stator sliding on the side walls of the first clamping plate 14 and the second clamping plate 16.

[0028] Further, as Figure 2 , Figure 3 , Figure 5As shown, a first rotating shaft 2 is rotatably connected to the side wall of the first connecting block 13; the first rotating shaft 2 is fixedly connected to the first clamping plate 14; a fixed disk 21 is fixedly connected to the side wall of the first connecting block 13; a plurality of jacks 22 are evenly formed in the side wall of the fixed disk 21; a rotating disk 23 is rotatably connected to the side wall of the first connecting block 13; the rotating disk 23 penetrates through the wall of the first connecting block 13 and is rotatably connected thereto; the rotating disk 23 is fixedly connected to the first rotating shaft 2; a spring 24 is fixedly connected to the side wall of the rotating disk 23; a plug rod 25 is fixedly connected to the end of the spring 24; a pull rod 26 is fixedly connected to the side wall of the plug rod 25; the pull rod 26 penetrates through the wall of the rotating disk 23 and is slidably connected thereto; a second rotating shaft 27 is rotatably connected to the side wall of the second connecting block 15; the second rotating shaft 27 is fixedly connected to the second clamping plate 16; during use, after the stator is clamped and fixed by the first clamping plate 14 and the second clamping plate 16, first hold and pull the pull rod 26, pull out the plug rod 25 from the side wall of the jack 22, then rotate the rotating disk 23, so that the rotating disk 23 drives the first rotating shaft 2 to rotate. As the first rotating shaft 2 rotates, the second rotating shaft 27 can be rotated simultaneously, thereby rotating the stator and adjusting its angle. When it rotates to a suitable position, the plug rod 25 can be made to correspond to the position of one of the jacks 22. At this time, by releasing the pull rod 26, the elastic force of the spring 24 can be used to push the plug rod 25 into the side wall of the jack 22 to make it stuck and fix the rotating disk 23 to prevent it from rotating. During this process, by rotating the rotating disk 23 to make the stator rotate, it can play a role in adjusting the angle during the installation of the stator, improving the flexibility during the installation of the stator. At the same time, through the plurality of jacks 22, it can improve the multi-gear adjustment effect during the rotation of the stator.

[0029] Further, as Figure 1 、 Figure 2 、 Figure 6As shown, a second spring rod 3 is fixedly connected to the side wall of the second connecting block 15; a control switch 31 is fixedly connected to the side wall of the base 1; a top plate 32 is hinged to the side wall of the control switch 31; a light supplement plate 33 is provided on the side wall of the base 1; when in use, when the first connecting block 13 and the second connecting block 15 approach each other to clamp the stator, at this time the second spring rod 3 will move away from the control switch 31, and the second spring rod 3 will lose the extrusion force on the top plate 32. Then, under the action of the torsion spring inside the hinge of the top plate 32, it will reset and press the control switch 31, thereby opening the light supplement plate 33, and illuminating the stator through the light supplement plate 33. When the installation of the stator is completed, during the process of the first connecting block 13 and the second connecting block 15 moving away from each other, the second spring rod 3 can be used to squeeze the top plate 32, thereby pressing the control switch 31 through the top plate 32 to close the light supplement plate 33. In this process, through the provided light supplement plate 33, it can play a role in illuminating when clamping and installing the stator, improving the accuracy of installing the stator, and reducing the influence on the installation effect caused by the relatively dim surrounding light during installation.

[0030] Further, as Figure 1 、 Figure 6 shown, a sliding cylinder 4 is fixedly connected to the side wall of the base 1; a rubber ring 41 is fixedly connected to the inner side wall of the sliding cylinder 4; a sliding rod 42 is slidably connected to the side wall of the rubber ring 41; the sliding rod 42 is fixedly connected to the light supplement plate 33; when in use, by holding the sliding rod 42 and pulling it to slide in the sliding cylinder 4, a certain frictional force will be generated through the mutual contact between the sliding rod 42 and the rubber ring 41 to fix the light supplement plate 33, thereby adjusting the height of the light supplement plate 33. In this process, by sliding the sliding rod 42 in the sliding cylinder 4, it can play a role in adjusting the height of the light supplement plate 33 during use, improving the flexibility of the light supplement plate 33 during use, and reducing the inconvenience of adjusting its height, resulting in a more cumbersome adjustment process and increasing a certain amount of workload.

[0031] Further, as Figure 4 shown, sliding grooves 5 are formed on the side walls of the first clamping plate 14 and the second clamping plate 16; an insertion block 51 is slidably connected to the side wall of the sliding groove 5; a rubber pad 52 is fixedly connected to the side wall of the insertion block 51; the insertion block 51 is fixedly connected to the rubber block 17; when in use, by holding the rubber block 17 and under the sliding cooperation of the insertion block 51 and the sliding groove 5, the insertion block 51 is inserted into the side wall of the sliding groove 5. At this time, a certain frictional force will be generated through the contact between the rubber pad 52 and the sliding groove 5, thereby fixing the rubber block 17. In this process, by inserting the insertion block 51 into the sliding groove 5 for fixation, it can play a role in facilitating the disassembly and installation of the rubber block 17, improving the convenience of disassembling and replacing the rubber block 17 when it is damaged, and reducing the difficulty of disassembling the rubber block 17, resulting in an increase in a certain amount of workload.

[0032] Further, asFigure 5 As shown, a clamping groove 6 is formed in the side wall of the pull rod 26; a plurality of anti-slip strips 61 are fixedly connected to the side wall of the clamping groove 6 evenly; during use, when the pull rod 26 is held and rotated, the hand will get stuck in the side wall of the clamping groove 6, and at the same time, certain frictional force will be generated through sufficient contact with the anti-slip strips 61. In this process, through the arranged clamping groove 6 and anti-slip strips 61, the anti-dropping effect of the hand on the pull rod 26 during holding and pulling can be achieved, the firmness of the hand on the side wall of the pull rod 26 can be improved, and the situation that it is easy to slide off from the side wall of the pull rod 26 when holding the pull rod 26 and pulling can be reduced.

[0033] Further, as Figure 5 shown, a plurality of elastic pieces 7 are fixedly connected to the side wall of the insertion rod 25 evenly; during use, when the insertion rod 25 is inserted into the side wall of the insertion hole 22, at this time, the elastic pieces 7 will generate certain deformation under the extrusion of the wall of the fixed disk 21. When the elastic pieces 7 pass through the wall of the insertion hole 22, they will automatically reset under their elastic action and abut against the side wall of the fixed disk 21. In this process, through the arranged elastic pieces 7, the anti-dropping effect of the insertion rod 25 on the side wall of the insertion hole 22 can be increased, the fixing effect on the insertion rod 25 can be improved, and the situation that the insertion rod 25 is easy to slide out from the side wall of the insertion hole 22 when the pull rod 26 is accidentally pulled can be reduced.

[0034] Working principle: When in use, place the stator in the middle of the first clamping plate 14 and the second clamping plate 16, and then start the servo motor 11. The servo motor 11 drives the bidirectional screw 12 to rotate. As the bidirectional screw 12 rotates, the first connecting block 13 and the second connecting block 15 can move in opposite directions. The first connecting block 13 and the second connecting block 15 can slide in the slots, moving closer to or away from each other. At this time, when the first clamping plate 14 and the second clamping plate 16 move closer to each other, the cushion block 110 first contacts the surface of the stator. Through extrusion, the first spring rod 19 performs a telescopic movement. At the same time, the first spring rod 19 can also exert a certain reaction force on the cushion block 110 to pre-fix the stator. Then, use the first clamping plate 14 and the second clamping plate 16 to clamp the stator. Through clamping, the rubber block 17 contacts the side wall of the stator and generates a certain frictional force to prevent the stator from sliding between the first clamping plate 14 and the second clamping plate 16, thereby clamping and fixing the stator. When in use, after clamping and fixing the stator with the first clamping plate 14 and the second clamping plate 16, first hold and pull the pull rod 26. After pulling out the plug rod 25 from the side wall of the jack 22, rotate the turntable 23. The turntable 23 drives the first rotating shaft 2 to rotate. As the first rotating shaft 2 rotates, the second rotating shaft 27 can also rotate at the same time, thereby rotating the stator and adjusting its angle. When it rotates to the appropriate position, the plug rod 25 can be aligned with the position of one of the jacks 22. At this time, release the pull rod 26. Using the elasticity of the spring 24, the plug rod 25 can be pushed into the side wall of the jack 22 to make it stuck and fix the turntable 23 to prevent it from rotating. When in use, when the first connecting block 13 and the second connecting block 15 move closer to clamp the stator, at this time, the second spring rod 3 will move away from the control switch 31, and the second spring rod 3 will lose the extrusion force on the top plate 32. Then, under the action of the torsion spring inside the hinge of the top plate 32, it will reset and press the control switch 31, thereby opening the light supplement plate 33 to illuminate the stator. When the installation of the stator is completed, during the process of the first connecting block 13 and the second connecting block 15 moving away from each other, the second spring rod 3 can squeeze the top plate 32, thereby pressing the control switch 31 through the top plate 32 to close the light supplement plate 33. When in use, hold and pull the sliding rod 42 to make it slide in the sliding cylinder 4. A certain frictional force will be generated through the mutual contact between the sliding rod 42 and the rubber ring 41 to fix the light supplement plate 33, thereby adjusting the height of the light supplement plate 33. When in use, hold the rubber block 17 and insert the plug block 51 into the side wall of the sliding groove 5 under the sliding fit of the plug block 51 and the sliding groove 5. At this time, a certain frictional force will be generated through the contact between the rubber pad 52 and the sliding groove 5, thereby fixing the rubber block 17. When in use, when holding and rotating the pull rod 26, the hand will get stuck in the side wall of the card slot 6, and at the same time, a certain frictional force will be generated through full contact with the anti-slip strip 61.In use, when the insertion rod 25 is inserted into the side wall of the jack 22, at this time, the elastic piece 7 will undergo a certain deformation under the extrusion of the wall body of the fixed disk 21. When the elastic piece 7 passes through the wall body of the jack 22, it will automatically reset under its elastic action and abut against the side wall of the fixed disk 21.,

[0035] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.,

Claims

1. A tooling device for installing a stator, comprising a base (1); characterized in that: A servo motor (11) is fixedly connected to the side wall of the base (1); a slot is provided on the side wall of the base (1); the output end of the servo motor (11) is fixedly connected to a bidirectional screw (12); a first connecting block (13) is threadedly connected to the side wall of the bidirectional screw (12); a first clamping plate (14) is provided on the side wall of the first connecting block (13); a second connecting block (15) is threadedly connected to the side wall of the bidirectional screw (12); a second clamping plate (16) is provided on the side wall of the second connecting block (15); the first connecting block (13), the second connecting block (15) and the slot are in sliding fit; rubber blocks (17) are provided on the side walls of the first clamping plate (14) and the second clamping plate (16); a plurality of grooves (18) are provided on the side wall of the rubber block (17); the grooves (18) are evenly distributed on the side wall of the rubber block (17) and have the same structure; a first spring rod (19) is fixedly connected to the side wall of the groove (18); a cushion block (110) is fixedly connected to the end of the first spring rod (19).

2. The stator tooling equipment for installation according to claim 1, characterized in that: A first rotating shaft (2) is rotatably connected to the side wall of the first connecting block (13); the first rotating shaft (2) is fixedly connected to the first clamping plate (14); a fixed disk (21) is fixedly connected to the side wall of the first connecting block (13); a plurality of insertion holes (22) are evenly provided on the side wall of the fixed disk (21); a turntable (23) is rotatably connected to the side wall of the first connecting block (13); the turntable (23) penetrates through the wall body of the first connecting block (13) and is rotatably connected thereto; the turntable (23) is fixedly connected to the first rotating shaft (2); a spring (24) is fixedly connected to the side wall of the turntable (23); a plug rod (25) is fixedly connected to the end of the spring (24); a pull rod (26) is fixedly connected to the side wall of the plug rod (25); the pull rod (26) penetrates through the wall body of the turntable (23) and is slidably connected thereto; a second rotating shaft (27) is rotatably connected to the side wall of the second connecting block (15); the second rotating shaft (27) is fixedly connected to the second clamping plate (16).

3. The stator tooling equipment for installation according to claim 1, characterized in that: A second spring rod (3) is fixedly connected to the side wall of the second connecting block (15); a control switch (31) is fixedly connected to the side wall of the base (1); a top plate (32) is hinged to the side wall of the control switch (31); a light supplementing plate (33) is provided on the side wall of the base (1).

4. The stator tooling equipment for installation according to claim 3, characterized in that: A sliding cylinder (4) is fixedly connected to the side wall of the base (1); a rubber ring (41) is fixedly connected to the inner side wall of the sliding cylinder (4); a sliding rod (42) is slidably connected to the side wall of the rubber ring (41); the sliding rod (42) is fixedly connected to the light supplementing plate (33).

5. A stator tooling equipment for installation according to claim 1, characterized in that: Chute (5) is provided on the side walls of the first clamping plate (14) and the second clamping plate (16); a plug block (51) is slidably connected to the side wall of the chute (5); a rubber pad (52) is fixedly connected to the side wall of the plug block (51); the plug block (51) is fixedly connected to the rubber block (17).

6. The stator tooling equipment for installation according to claim 2, characterized in that: A clamping groove (6) is provided on the side wall of the pull rod (26); a plurality of anti-slip strips (61) are evenly fixedly connected to the side wall of the clamping groove (6).

7. The stator tooling equipment for installation according to claim 2, characterized in that: A plurality of elastic sheets (7) are evenly fixedly connected to the side wall of the plug rod (25).

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