Surface treatment equipment for cable protection pipe production

Abstract

The utility model provides a kind of surface treatment equipment for cable protection pipe production, comprising: operation platform, movable slot, moving device, two mounting seats, two rotating devices, two limiting devices, two fixed seats, rotating device, two adjusting components, water absorption component and clamping component.The utility model provides a kind of surface treatment equipment for cable protection pipe production, two fixed seats, two groups of driving motor and rotating rod cooperation movable sleeve, multiple supports and bolt are used with water absorption component on the side of operation platform surface, it is convenient to the moisture absorption wiping of the surface of cable protection pipe between two limiting devices, and it can be replaced by rotating mode after long time work of water absorption roller.

Description

Technical Field

[0001] This utility model relates to the field of cable protection pipes, and in particular to a surface treatment equipment for the production of cable protection pipes. Background Technology

[0002] Cable protection pipes are metal protective pipes with a certain mechanical strength that are laid on the outer layer of cables to prevent them from being damaged. During the processing and production of cable protection pipes, a lot of moisture may sometimes be generated on the surface, so it is necessary to treat the surface of the cable protection pipes, which requires a surface treatment equipment for cable protection pipe production.

[0003] The prior art patent application with publication number CN222187553U describes a method where an electric telescopic rod is activated to move a slider B inside the base, causing the protrusion B to move and bring the water-absorbing brush into contact with the cable protection tube. Loosening the locking bolts activates a second motor to rotate the rotating column, causing the cable protection tube to rotate. The water-absorbing brush pre-absorbs moisture from the cable protection tube, and a squeezing block removes the water absorbed by the brush, improving its absorption effect. A fan is activated to draw outside air through a filter plate into the horizontal block, where the air, heated by a heating plate, is blown out to dry the moisture-absorbing cable protection tube. This method is more efficient and provides a more thorough drying process.

[0004] However, the water-absorbing brushes installed on current surface treatment devices wipe the surface of cable protection pipes to remove moisture. However, when multiple cable protection pipes are subjected to water absorption operations for a long time, the water absorption efficiency of the current water-absorbing brushes will decrease.

[0005] Therefore, it is necessary to provide a surface treatment device for the production of cable protection pipes to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a surface treatment device for the production of cable protection pipes, which solves the problem that the water absorption efficiency of the current water absorption brush will decrease when multiple cable protection pipes are subjected to water absorption operations for a long time.

[0007] To solve the above-mentioned technical problems, this utility model provides a surface treatment equipment for the production of cable protection pipes, comprising: Operating platform, movable slot, moving device, two mounting bases, two rotating devices, two limiting devices, two fixed bases, rotating device, two adjusting components, water suction component and snap-fit ​​component; The movable slot is formed on the surface of the operating table; The moving device is disposed inside the movable slot; The two mounting bases are respectively disposed on the mobile device; The two rotating devices are respectively disposed on one side of the two mounting bases; The two limiting devices are respectively disposed on opposite sides of the two mounting bases; The two mounting bases are symmetrically installed on both sides of the operating table surface; The rotating device is disposed on one side of one of the fixed seats. The rotating device includes a drive motor and a rotating rod. The drive motor is mounted on one side of one of the fixed seats, and the rotating rod is connected to one end of the drive motor through a coupling. The two adjustment components are respectively disposed on both sides of the surface of the rotating rod. Each adjustment component includes a movable sleeve, multiple brackets and bolts. The movable sleeve is sleeved on the surface of the rotating rod, the multiple brackets are respectively connected to the surface of the movable sleeve, and the bolts are disposed between the movable sleeve and the rotating rod. The water-absorbing component is disposed on the surface of the rotating rod; The snap-fit ​​assembly is located on one side of the other fixing base.

[0008] Preferably, the moving device includes a motor, a threaded rod, and two threaded sleeves. The motor is mounted on one end of the operating table, the threaded rod is connected to one end of the motor via a coupling, and the two threaded sleeves are respectively threaded to the surfaces of the two threaded rods.

[0009] Preferably, a partition block is provided at the center of the surface of the threaded rod.

[0010] Preferably, the rotating device includes a rotating motor and a rotating frame, the rotating motor is mounted on the surface of the mounting base, and the rotating frame is connected to one end of the rotating motor via a coupling.

[0011] Preferably, the limiting device includes a double-headed hydraulic telescopic rod, two connecting brackets, and two arc-shaped limiting blocks. The double-headed hydraulic telescopic rod is installed inside the rotating frame, the two connecting brackets are respectively connected to both ends of the double-headed hydraulic telescopic rod, and the two arc-shaped limiting blocks are respectively connected to one end of the two connecting brackets.

[0012] Preferably, the water absorption assembly includes a water absorption roller, two circular connecting blocks, and two fixing sleeves. The two circular connecting blocks are respectively connected to both ends of the water absorption roller, and the two fixing sleeves are respectively fitted onto the surfaces of the two circular connecting blocks.

[0013] Preferably, the snap-fit ​​assembly includes a circular snap-fit ​​block, a snap-fit ​​bolt, and a plurality of snap-fit ​​holes. The circular snap-fit ​​block is connected to one end of the rotating rod via a connecting block. The snap-fit ​​bolt is disposed between the circular snap-fit ​​block and the fixing seat. The plurality of snap-fit ​​holes are respectively formed on the surface of the circular snap-fit ​​block.

[0014] Preferably, a guide assembly is provided on one side of the operating table. The guide assembly includes a circular rod, a sliding sleeve, an extension bracket, a guide plate, a positioning bolt, and a positioning seat. The circular rod is connected to the bottom of the operating table through the positioning seat. The sliding sleeve is fitted onto the surface of the circular rod. The extension bracket is connected to the bottom of the sliding sleeve. The guide plate is connected to one end of the extension bracket. The positioning bolt is disposed between the sliding sleeve and the circular rod.

[0015] Compared with related technologies, the surface treatment equipment for producing cable protection pipes provided by this utility model has the following advantages: This utility model provides a surface treatment equipment for the production of cable protection pipes. Two fixed seats, two sets of drive motors and rotating rods are set on one side of the operating table surface, which are used in conjunction with movable sleeves, multiple brackets and bolts and water absorption components to facilitate the absorption and wiping of water on the surface of the cable protection pipe between the two limiting devices. The water absorption roller can be replaced by rotating after long-term operation. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a first embodiment of a surface treatment device for producing cable protection pipes provided by this utility model; Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below; Figure 3 for Figure 1 The enlarged schematic diagram of section B is shown below; Figure 4 for Figure 1 The enlarged schematic diagram of section C is shown below; Figure 5 for Figure 1 The diagram shows a three-dimensional structure of the surface treatment equipment. Figure 6 for Figure 5 The enlarged schematic diagram of part D is shown below; Figure 7 for Figure 5 The enlarged schematic diagram of part E is shown below; Figure 8 This is a schematic diagram of the second embodiment of a surface treatment device for producing cable protection pipes provided by this utility model.

[0017] The diagram is labeled: 1. Control panel; 2. Movable slot. 3. Moving device; 31. Motor; 32. Threaded rod; 33. Threaded sleeve. 4. Divider block; 5. Mounting base; 6. Fixing base. 7. Rotating device; 71. Rotating motor; 72. Rotating frame; 8. Limiting device; 81. Double-headed hydraulic telescopic rod; 82. Connecting bracket; 83. Arc-shaped limiting block. 9. Rotating device; 91. Drive motor; 92. Rotating rod. 10. Adjustment component; 101. Movable sleeve; 102. Bracket; 103. Bolt. 11. Water absorption assembly; 111. Water absorption roller; 112. Circular connecting block; 113. Fixing sleeve. 12. Snap-fit ​​assembly; 121. Circular snap-fit ​​block; 122. Snap-fit ​​bolt; 123. Snap-fit ​​hole. 13. Guide assembly; 131. Circular rod; 132. Sliding sleeve; 133. Extension bracket; 134. Guide plate; 135. Positioning bolt; 136. Positioning seat. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] First Embodiment Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a surface treatment device for producing cable protection pipes provided by this utility model; Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below; Figure 3 for Figure 1 The enlarged schematic diagram of section B is shown below; Figure 4 for Figure 1 The enlarged schematic diagram of section C is shown below; Figure 5 for Figure 1 The diagram shows a three-dimensional structure of the surface treatment equipment. Figure 6 for Figure 5 The enlarged schematic diagram of part D is shown below; Figure 7 for Figure 5 The enlarged schematic diagram of part E shown. A surface treatment device for producing cable protection pipes, comprising: 1. Operating table; 2. Movable slot; 3. Moving device; 5. Two mounting bases; 7. Two rotating devices; 8. Two limiting devices; 6. Two fixed bases; 9. Rotating device; 10. Two adjusting components; 11. Water absorption component; and 12. Snap-fit ​​component. The movable slot 2 is formed on the surface of the operating table 1; The moving device 3 is disposed inside the movable slot 2; The two mounting bases 5 are respectively disposed on the mobile device 3; The two rotating devices 7 are respectively disposed on one side of the two mounting bases 5; The two limiting devices 8 are respectively disposed on opposite sides of the two mounting bases 5; The two fixing seats 6 are symmetrically installed on both sides of the surface of the operating table 1; The rotating device 9 is disposed on one side of one of the fixed bases 6. The rotating device 9 includes a drive motor 91 and a rotating rod 92. The drive motor 91 is mounted on one side of one of the fixed bases 6, and the rotating rod 92 is connected to one end of the drive motor 91 through a coupling. Two adjustment components 10 are respectively disposed on both sides of the surface of the rotating rod 92. Each adjustment component 10 includes a movable sleeve 101, multiple brackets 102 and bolts 103. The movable sleeve 101 is sleeved on the surface of the rotating rod 92, the multiple brackets 102 are respectively connected to the surface of the movable sleeve 101, and the bolts 103 are disposed between the movable sleeve 101 and the rotating rod 92. The water-absorbing component 11 is disposed on the surface of the rotating rod 92; The snap-fit ​​component 12 is disposed on one side of another of the fixing seats 6.

[0020] The moving device 3 includes a motor 31, a threaded rod 32 and two threaded sleeves 33. The motor 31 is mounted on one end of the operating table 1. The threaded rod 32 is connected to one end of the motor 31 through a coupling. The two threaded sleeves 33 are respectively threaded to the surfaces of the two threaded rods 32.

[0021] The threaded rod 32 is coaxially connected to the output end of the motor 31 via a coupling, and the surface of the threaded rod 32 is provided with two sections of threads with opposite directions of rotation around the center; two threaded sleeves 33 are respectively threaded to the two sections of reverse threaded surfaces of the threaded rod 32, and a separator block 4 is welded at the center of the surface of the threaded rod 32 to limit the movement limits of the two threaded sleeves 33 and avoid collision.

[0022] A partition block 4 is provided at the center of the surface of the threaded rod 32.

[0023] The rotating device 7 includes a rotating motor 71 and a rotating frame 72. The rotating motor 71 is mounted on the surface of the mounting base 5, and the rotating frame 72 is connected to one end of the rotating motor 71 via a coupling.

[0024] The rotating device 7 is used to drive the limiting device 8 to rotate the cable protection pipe. The rotating motor 71 is fixedly installed on the surface of the mounting base 5 by bolts. The rotating frame 72 is connected to the output end of the rotating motor 71 by a coupling and has a U-shaped structure to provide a mounting carrier for the limiting device 8.

[0025] Multiple brackets 102 are evenly welded to the surface of the movable sleeve 101 for connecting the fixed sleeve 113; bolts 103 are threaded through the side wall of the movable sleeve 101, and the position of the movable sleeve 101 is fixed by tightening the bolts 103 to tighten the rotating rod 92.

[0026] The rotating device 9 is used to drive the water-absorbing assembly 11 to rotate for replacement.

[0027] The limiting device 8 includes a double-headed hydraulic telescopic rod 81, two connecting brackets 82, and two arc-shaped limiting blocks 83. The double-headed hydraulic telescopic rod 81 is installed inside the rotating frame 72. The two connecting brackets 82 are respectively connected to the two ends of the double-headed hydraulic telescopic rod 81, and the two arc-shaped limiting blocks 83 are respectively connected to one end of the two connecting brackets 82.

[0028] The double-headed hydraulic telescopic rod 81 is horizontally installed inside the rotating frame 72. Two connecting brackets 82 are welded to the output shafts at both ends of the double-headed hydraulic telescopic rod 81. Two arc-shaped limit blocks 83 are connected to one end of the two connecting brackets 82 by bolts. Rubber anti-slip pads are glued to the inner side of the arc-shaped limit blocks 83, which not only improves the clamping stability but also avoids damage to the surface of the cable protection pipe.

[0029] The water absorption assembly 11 includes a water absorption roller 111, two circular connecting blocks 112 and two fixing sleeves 113. The two circular connecting blocks 112 are respectively connected to the two ends of the water absorption roller 111, and the two fixing sleeves 113 are respectively fitted onto the surfaces of the two circular connecting blocks 112.

[0030] The water-absorbing roller 111 is made of highly elastic water-absorbing sponge material. Two circular connecting blocks 112 are integrally formed at both ends of the water-absorbing roller 111. Two fixing sleeves 113 are welded to the ends of the two side brackets 102 respectively. The fixing sleeves 113 and the circular connecting blocks 112 are fitted with a clearance, which facilitates quick assembly and disassembly of the water-absorbing roller 111.

[0031] The snap-fit ​​assembly 12 includes a circular snap-fit ​​block 121, a snap-fit ​​bolt 122, and a plurality of snap-fit ​​holes 123. The circular snap-fit ​​block 121 is connected to one end of the rotating rod 92 via a connecting block. The snap-fit ​​bolt 122 is disposed between the circular snap-fit ​​block 121 and the fixed base 6. The plurality of snap-fit ​​holes 123 are respectively opened on the surface of the circular snap-fit ​​block 121.

[0032] The circular snap-fit ​​block 121 is welded to the free end of the rotating rod 92 via a connecting block. The snap-fit ​​bolt 122 is threaded through the fixing seat 6 and extends to one side of the circular snap-fit ​​block 121. Multiple snap-fit ​​holes 123 are evenly opened on the surface of the circular snap-fit ​​block 121 with the rotating rod 92 as the center. The snap-fit ​​holes 123 are adapted to the snap-fit ​​bolts 122. By inserting the snap-fit ​​bolts 122 into different snap-fit ​​holes 123, the angle of the rotating rod 92 can be fixed.

[0033] The working principle of the surface treatment equipment for producing cable protection pipes provided by this utility model is as follows: When in use, the motor 31 of the moving device 3 is started according to the length of the cable protection pipe to be processed. The motor 31 drives the threaded rod 32 to rotate. Since the surface of the threaded rod 32 is reverse threaded, the two threaded sleeves 33 will drive the mounting seat 5 to move in opposite directions or in opposite directions along the movable groove 2. After adjusting to a suitable distance, the motor 31 is turned off.

[0034] Place the cable protection pipe between the two limiting devices 8, start the double-headed hydraulic telescopic rod 81, and its two end output shafts drive the connecting bracket 82 and the arc-shaped limiting block 83 to move towards each other until the arc-shaped limiting block 83 tightly fits the inner wall of both ends of the cable protection pipe, thus completing the compression and fixing.

[0035] According to the diameter of the cable protection pipe, loosen the bolt 103 of the adjusting component 10, slide the movable sleeve 101 to drive the water absorption component 11 to move, so that the water absorption roller 111 is in contact with the surface of the cable protection pipe. Then tighten the bolt 103 to fix the position of the movable sleeve 101. At the same time, loosen the locking bolt 122 of the locking component 12, start the drive motor 91 of the rotating device 9, drive the rotating rod 92 and the water absorption component 11 to rotate, adjust the contact angle between the water absorption roller 111 and the cable protection pipe, and then insert the locking bolt 122 into the corresponding locking hole 123 to fix it.

[0036] The rotating motor 71 of the rotating device 7 is started, which drives the rotating frame 72, the limiting device 8 and the cable protection pipe to rotate synchronously. During the rotation, the water absorption roller 111 fully absorbs the moisture on the surface of the cable protection pipe. When the water absorption roller 111 becomes saturated with water, causing the efficiency to decrease, the locking bolt 122 is loosened, the drive motor 91 is started to drive the rotating rod 92 to rotate, so that the spare water absorption roller 111 or the new water absorption roller 111 is switched to the working position and then fixed by the locking bolt 122. At the same time, the saturated water absorption roller 111 can be removed, squeezed to dehydrate or replaced.

[0037] Compared with related technologies, the surface treatment equipment for producing cable protection pipes provided by this utility model has the following advantages: This utility model provides a surface treatment equipment for the production of cable protection pipes. Two fixed seats 6, two sets of drive motors 91 and rotating rods 92 are set on one side of the surface of the operating table 1. They are used in conjunction with movable sleeves 101, multiple brackets 102 and bolts 103 and water absorption components 11 to facilitate the absorption and wiping of water on the surface of the cable protection pipe between the two limiting devices 8. The water absorption rollers 111 can be replaced by rotating after long-term operation.

[0038] Second Embodiment Please refer to the following: Figure 8 Based on the surface treatment equipment for producing cable protection pipes provided in the first embodiment of this application, the second embodiment of this application proposes another surface treatment equipment for producing cable protection pipes. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0039] Specifically, the second embodiment of this application provides a surface treatment device for producing cable protection pipes, which differs in that it further includes a guide assembly 13. The guide assembly 13 is disposed on one side of the operating table 1. The guide assembly 13 includes a circular rod 131, a sliding sleeve 132, an extension bracket 133, a guide plate 134, a positioning bolt 135, and a positioning seat 136. The circular rod 131 is connected to the bottom of the operating table 1 through the positioning seat 136. The sliding sleeve 132 is sleeved on the surface of the circular rod 131. The extension bracket 133 is connected to the bottom of the sliding sleeve 132. The guide plate 134 is connected to one end of the extension bracket 133. The positioning bolt 135 is disposed between the sliding sleeve 132 and the circular rod 131.

[0040] By setting a guide assembly 13 at the bottom of the operating table 1, the horizontal position of the guide plate 134 can be adjusted by using a circular rod 131 and a sliding sleeve 132. The tilt angle can be adjusted with the hinge, which can adapt to the feeding requirements of cable protection pipes of different specifications. The rubber buffer pad on the surface of the guide plate 134 effectively buffers the impact force of feeding and avoids damage to the surface of the cable protection pipe, further improving the practicality and operational safety of the equipment.

[0041] A circular rod 131 is horizontally welded to one side of the positioning seat 136. A sliding sleeve 132 is slidably fitted onto the surface of the circular rod 131. An extension bracket 133 has an L-shaped structure, with one end welded to the bottom of the sliding sleeve 132 and the other end extending to the outside of the operating table 1. A guide plate 134 is connected to the end of the extension bracket 133 via a hinge. A rubber buffer pad is adhered to the surface of the guide plate 134. A positioning bolt 135 is threaded through the side wall of the sliding sleeve 132. By tightening the positioning bolt 135, the circular rod 131 is pressed against the rod, thereby fixing the position of the sliding sleeve 132.

[0042] The working principle of the surface treatment equipment for producing cable protection pipes provided by this utility model is as follows: According to the cutting direction and height of the cable protection pipe, loosen the positioning bolt 135 of the guide assembly 13, and the sliding sleeve 132 moves along the circular rod 131, driving the extension bracket 133 and the guide plate 134 to adjust to the appropriate position. Then tighten the positioning bolt 135 to fix the sliding sleeve 132. At the same time, the tilt angle of the guide plate 134 can be adjusted by the hinge to adapt to different cutting requirements.

[0043] After the surface treatment of the cable protection pipe is completed, the double-headed hydraulic telescopic rod 81 is activated to loosen the arc-shaped limit block 83. The cable protection pipe rolls onto the guide plate 134 under its own weight or slight push, and slides smoothly into the designated collection area under the guidance of the guide plate 134, avoiding direct drop that could cause surface damage or deformation.

[0044] Compared with related technologies, the surface treatment equipment for producing cable protection pipes provided by this utility model has the following advantages: This utility model provides a surface treatment equipment for the production of cable protection pipes. A circular rod 131, a sliding sleeve 132, an extension bracket 133, a guide plate 134, a positioning bolt 135, and a positioning seat 136 are provided on one side of the bottom of the operating table 1 to facilitate the guiding operation of unloading the treated cable protection pipes.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A surface treatment device for producing cable protection pipes, characterized in that, include: Operating platform, movable slot, moving device, two mounting bases, two rotating devices, two limiting devices, two fixed bases, rotating device, two adjusting components, water suction component and snap-fit ​​component; The movable slot is formed on the surface of the operating table; The moving device is disposed inside the movable slot; The two mounting bases are respectively disposed on the mobile device; The two rotating devices are respectively disposed on one side of the two mounting bases; The two limiting devices are respectively disposed on opposite sides of the two mounting bases; The two mounting bases are symmetrically installed on both sides of the operating table surface; The rotating device is disposed on one side of one of the fixed seats. The rotating device includes a drive motor and a rotating rod. The drive motor is mounted on one side of one of the fixed seats, and the rotating rod is connected to one end of the drive motor through a coupling. The two adjustment components are respectively disposed on both sides of the surface of the rotating rod. Each adjustment component includes a movable sleeve, multiple brackets and bolts. The movable sleeve is sleeved on the surface of the rotating rod, the multiple brackets are respectively connected to the surface of the movable sleeve, and the bolts are disposed between the movable sleeve and the rotating rod. The water-absorbing component is disposed on the surface of the rotating rod; The snap-fit ​​assembly is located on one side of the other fixing base.

2. The surface treatment equipment for producing cable protection pipes according to claim 1, characterized in that, The moving device includes a motor, a threaded rod, and two threaded sleeves. The motor is mounted on one end of the operating table, the threaded rod is connected to one end of the motor via a coupling, and the two threaded sleeves are respectively threaded to the surfaces of the two threaded rods.

3. The surface treatment equipment for producing cable protection pipes according to claim 2, characterized in that, A separator block is provided at the center of the surface of the threaded rod.

4. The surface treatment equipment for producing cable protection pipes according to claim 1, characterized in that, The rotating device includes a rotating motor and a rotating frame. The rotating motor is mounted on the surface of the mounting base, and the rotating frame is connected to one end of the rotating motor via a coupling.

5. The surface treatment equipment for producing cable protection pipes according to claim 4, characterized in that, The limiting device includes a double-headed hydraulic telescopic rod, two connecting brackets, and two arc-shaped limiting blocks. The double-headed hydraulic telescopic rod is installed inside the rotating frame. The two connecting brackets are respectively connected to both ends of the double-headed hydraulic telescopic rod, and the two arc-shaped limiting blocks are respectively connected to one end of the two connecting brackets.

6. The surface treatment equipment for producing cable protection pipes according to claim 1, characterized in that, The water absorption assembly includes a water absorption roller, two circular connecting blocks, and two fixing sleeves. The two circular connecting blocks are respectively connected to both ends of the water absorption roller, and the two fixing sleeves are respectively fitted onto the surfaces of the two circular connecting blocks.

7. The surface treatment equipment for producing cable protection pipes according to claim 1, characterized in that, The snap-fit ​​assembly includes a circular snap-fit ​​block, a snap-fit ​​bolt, and multiple snap-fit ​​holes. The circular snap-fit ​​block is connected to one end of the rotating rod via a connecting block. The snap-fit ​​bolt is disposed between the circular snap-fit ​​block and the fixed base. The multiple snap-fit ​​holes are respectively opened on the surface of the circular snap-fit ​​block.

8. The surface treatment equipment for producing cable protection pipes according to claim 1, characterized in that, A guide assembly is provided on one side of the operating table. The guide assembly includes a circular rod, a sliding sleeve, an extension bracket, a guide plate, a positioning bolt, and a positioning seat. The circular rod is connected to the bottom of the operating table through the positioning seat. The sliding sleeve is fitted onto the surface of the circular rod. The extension bracket is connected to the bottom of the sliding sleeve. The guide plate is connected to one end of the extension bracket. The positioning bolt is disposed between the sliding sleeve and the circular rod.

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