A turning device for processing a rectangular-section hole of an anti-slide pile

Abstract

The application discloses a kind of turning device for the processing of rectangular section repair hole drill bit of anti-slide pile, including base, one end of base top is equipped with machine case, rotating sleeve is arranged in machine case, and the both ends of rotating sleeve are respectively arranged in the both ends of machine case surface, rotating sleeve is rotatably arranged in the center of inside, and positioning pipe is arranged in machine case, rotating mechanism for rotating rotating sleeve is arranged in machine case, positioning mechanism is arranged in positioning pipe, the other end of base top is equipped with moving frame, moving frame is arranged in arc, and moving frame top is arranged in open type, one end of moving frame corresponds with positioning pipe, conveying mechanism is arranged in moving frame, and support is fixedly connected on the bottom of base.The multiple clamping blocks on the surface of positioning pipe can clamp the drill bit conveyed in the inside of positioning pipe, and the multiple clamping blocks can be limited to slide in the process of conveying drill bit to the inside of positioning pipe, so that the drill bit contact is limited, so that the drill bit is replaced, so that the use convenience of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of turning equipment technology, and in particular to a turning device for machining a drill bit for repairing rectangular sections of anti-slip piles. Background Technology

[0002] Rectangular cross-section drill bits for anti-slide piles are specialized tools used in civil engineering and foundation construction. They are primarily used to correct the shape and size of irregular holes in anti-slide piles (also known as anti-slide pile foundations). Compared to traditional round drill bits, rectangular cross-sections can more effectively correct the edges of the pile body, ensuring that the geometry of the pile body meets design requirements. They are typically made of high-strength alloy materials to improve the wear resistance and service life of the drill bits. Regular maintenance, inspection, and upkeep are required to ensure good performance and extend service life.

[0003] However, in actual use, most existing turning devices for machining rectangular section drill bits for anti-slide piles require manual removal of the machined drill bit and installation of the drill bit to be machined. The installation of the drill bit is mostly done by clamping it to make the drill bit more stable during the machining process. However, this method is cumbersome and inefficient, cannot achieve quick material change, and wastes labor costs. Therefore, it is necessary to solve the above problems. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a turning device for machining a drill bit for repairing rectangular cross-section holes in anti-slide piles.

[0005] This invention proposes a turning device for machining rectangular section drill bits for anti-slip piles, comprising a base, a housing mounted on one top end of the base, a rotating roller rotatably mounted inside the housing, with both ends of the roller respectively disposed on the surface of the housing, a positioning tube rotatably mounted at the center of the roller, a rotating mechanism for the rotating roller inside the housing, a positioning mechanism inside the positioning tube, a movable frame mounted on the other top end of the base, the movable frame being arc-shaped, open at the top, and horizontally positioned, with one end of the movable frame corresponding to the positioning tube, a conveying mechanism inside the movable frame, and a bracket fixedly connected to the bottom of the base. Multiple clamping blocks sliding on the surface of the positioning tube can clamp the drill bit conveyed inside the positioning tube. Simultaneously, during the conveying of the drill bit into the positioning tube, the sliding of the clamping blocks can be restricted, facilitating contact restriction with the drill bit and thus facilitating drill bit replacement, thereby improving the ease of use of the device.

[0006] Preferably, the rotating mechanism includes a speed-changing gear set, a mounting box is provided at the bottom of the base, the mounting box is fixedly connected to the bottom of the machine housing, an external gear ring is coaxially sleeved on the outer surface of the rotating roller, the external gear ring is rotatably sleeved inside the machine housing, the speed-changing gear set is installed inside the mounting box, the speed-changing gear set and the external gear ring mesh with each other, a first servo motor is provided at the bottom of the base, the first servo motor is installed on the surface of the mounting box, the output end of the first servo motor is fixedly connected to the center of the surface of the input gear in the speed-changing gear set, for rotating the rotating roller, and simultaneously, under the connection of the moving roller, it also drives the positioning tube to rotate together, thereby causing the drill bit set inside the positioning tube to rotate together.

[0007] Furthermore, the positioning mechanism includes clamping blocks. Multiple fixing boxes are fixedly connected to the arc surface of the outer surface of the positioning tube. These fixing boxes are evenly distributed in a ring and are all connected to the interior of the positioning tube. Multiple clamping blocks are provided, each slidably connected to the interior of one of the fixing boxes. Each clamping block is arc-shaped at one end and has an anti-slip groove at that end. Limiting grooves are formed at opposite ends inside each of the fixing boxes. Limiting blocks are slidably connected to each limiting groove and are fixedly connected to both ends of the clamping block surfaces. Inclined grooves are formed on both symmetrical sides of the clamping block surfaces. A horizontal moving groove is formed inside the rotating roller, coaxial with the rotating roller. A moving roller is slidably connected inside the moving groove. The positioning tube is slidably sleeved at the center of the moving roller. The moving roller has an internal opening... The device has multiple sliding grooves, and multiple fixed boxes are slidably connected inside the multiple sliding grooves. Fixed columns are fixedly connected to opposite sides of each of the multiple sliding grooves, with each pair of fixed columns slidably connected to two inclined grooves on the surface of each clamping block. Multiple connecting rods are horizontally fixedly connected to one side of the moving roller surface. These connecting rods are slidably sleeved inside the rotating roller and inserted through the rotating roller surface. A connecting ring is horizontally slidably connected to one end of each of the multiple connecting rods on the rotating roller surface. A second spring is sleeved on the surface of each of the multiple connecting rods, with one end of each second spring located on the rotating roller surface and the other end located on the connecting ring surface. This restricts the horizontal sliding of the moving roller inside the rotating roller, thus restricting the sliding of the multiple clamping blocks, allowing the multiple clamping blocks to clamp or release the drill bit.

[0008] Preferably, the conveying mechanism includes a top rod slidably connected to the center of the movable frame. A sliding plate is slidably connected inside the movable frame. The top rod is fixedly connected to the center of one side of the sliding plate surface. A slot is formed through the bottom of the movable frame. A slider is horizontally slidably connected to the bottom of the movable frame. The top of the slider is slidably connected to the inside of the slot. The sliding plate is fixedly connected to the top of the slider. Two support plates are vertically fixedly connected to the top of the base. The two ends of the movable frame are respectively fixedly connected to the surfaces of the two support plates. One of the support plates has a through-hole that communicates with the interior of the movable frame. Two sliding rods are horizontally fixedly connected between the two support plates. Sliding sleeves are slidably fitted onto the surfaces of the two sliding rods. Both sliding sleeves are fixedly connected to the surface of the slider. A lead screw is horizontally rotatably connected between the two support plates. The two ends of the lead screw are rotatably fitted into the interiors of the two support plates. The other support plate... A second servo motor is mounted on the surface, and the output end of the second servo motor is fixedly connected to one end of a lead screw. The lead screw is rotatably sleeved inside a slider, and the slider and the lead screw cooperate with each other. A pressing block is horizontally slidably connected between the two support plates. The pressing block is set on the surface of the support plate near one end of the housing. Multiple push rods are horizontally fixedly connected to the surface of the pressing block. The multiple push rods slide through the surface of one of the support plates. A limiting piece is fixedly connected to one end of each of the multiple push rods. The multiple limiting pieces correspond to the surface of the connecting ring. A first spring is sleeved on the surface of each of the two sliding rods. One end of each of the two first springs is set on the surface of the pressing block, and the other end of each of the two first springs is set on the surface of the two sliding sleeves, which is used to limit the horizontal sliding of the push rod inside the moving frame. This allows the drill bit placed inside the moving frame to be pushed into the positioning tube. At the same time, the drill bit pushed into the positioning tube is clamped, allowing the drill bit to be picked up and put away.

[0009] In this invention, the drill bit inside the positioning tube can be positioned and clamped by setting multiple clamping blocks during use, which facilitates the processing of the drill bit and improves the effectiveness of the device.

[0010] During use, the sliding plate and top rod facilitate the transport of the processing drill bits placed inside the mobile frame, allowing the drill bits to be transported into the positioning tube, which makes material changing more convenient.

[0011] When replacing the drill bit inside the positioning tube, the moving roller is slid through the connecting ring, which causes multiple clamping blocks to slide away from each other, thus pushing out the finished drill bit inside the positioning tube and replacing it with a new drill bit, thereby improving the ease of use of the device. Attached Figure Description

[0012] Figure 1This is a front view of a turning device for machining a rectangular section drill bit for anti-slide piles, as proposed in this invention. Figure 2 This is a schematic diagram of the outer surface structure of a turning device for machining a rectangular section drill bit for anti-slide piles, as proposed in this invention. Figure 3 This is a schematic diagram of the rotating mechanism of a turning device for machining a rectangular section drill bit for anti-slide piles, as proposed in this invention. Figure 4 This is a cross-sectional view of the internal structure of the roller in a turning device for machining a rectangular section drill bit for anti-slide piles, as proposed in this invention. Figure 5 This is a schematic diagram of the positioning mechanism of a turning device for machining a rectangular section drill bit for anti-slide piles, as proposed in this invention. Figure 6 This is a schematic diagram of the moving roller surface structure of a turning device for machining a rectangular section drill bit for anti-slip piles, as proposed in this invention. Figure 7 This is a schematic diagram of the conveying mechanism of a turning device for machining a rectangular section drill bit for anti-slide piles, as proposed in this invention. Figure 8 This is a partial structural schematic diagram of a turning device for machining a rectangular section drill bit for anti-slip piles, as proposed in this invention.

[0013] In the diagram: 1. Base; 11. Bracket; 12. Support plate; 13. Connecting port; 14. Slide rod; 15. First spring; 2. Chassis; 21. Mounting box; 3. Rotary roller; 31. External gear ring; 32. Speed-changing gear set; 33. First servo motor; 34. Moving groove; 4. Moving frame; 41. Groove; 5. Top rod; 51. Slider; 52. Slide plate; 53. Sliding sleeve; 54. Lead screw; 55. Second servo motor; 6. Positioning tube; 61. Fixing box; 62. Limiting groove; 7. Moving roller; 71. Connecting rod; 72. Connecting ring; 73. Second spring; 74. Slide groove; 75. Fixing column; 8. Clamping block; 81. Inclined groove; 82. Limiting block; 9. Extrusion block; 91. Push rod; 92. Limiting piece. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0015] Reference Figures 1-8A turning device for machining rectangular section drill bits for anti-slip piles includes a base 1, a housing 2 mounted on one top end of the base 1, a rotating roller 3 rotatably mounted inside the housing 2, with two ends of the roller 3 respectively located on the two ends of the surface of the housing 2, a positioning tube 6 rotatably mounted at the center of the roller 3, a rotating mechanism for rotating the roller 3 inside the housing 2, a positioning mechanism inside the positioning tube 6, a movable frame 4 mounted on the other top end of the base 1, the movable frame 4 being arc-shaped, open at the top, and horizontally positioned, with one end of the movable frame 4 corresponding to the positioning tube 6, and a conveying mechanism inside the movable frame 4, and a bracket 11 fixedly connected to the bottom of the base 1. Multiple clamping blocks 8 sliding on the surface of the positioning tube 6 can clamp the drill bit conveyed inside the positioning tube 6, and during the process of conveying the drill bit into the positioning tube 6, the sliding of the multiple clamping blocks 8 can be restricted, facilitating contact restriction of the drill bit, thereby facilitating drill bit replacement and improving the ease of use of the device.

[0016] Reference Figure 1 and Figure 3 In a preferred embodiment, the rotating mechanism includes a speed-changing gear set 32. A mounting box 21 is provided at the bottom of the base 1 and is fixedly connected to the bottom of the housing 2. An external gear ring 31 is coaxially sleeved on the outer surface of the rotating roller 3 and is rotatably sleeved inside the housing 2. The speed-changing gear set 32 ​​is installed inside the mounting box 21 and meshes with the external gear ring 31. A first servo motor 33 is provided at the bottom of the base 1 and is installed on the surface of the mounting box 21. The output end of the first servo motor 33 is fixedly connected to the center of the surface of the input gear in the speed-changing gear set 32 ​​for rotating the rotating roller 3. At the same time, under the connection of the moving roller 7, it will also drive the positioning tube 6 to rotate, thereby causing the drill bit set inside the positioning tube 6 to rotate as well.

[0017] Reference Figure 4 , Figure 5 and Figure 6In a preferred embodiment, the positioning mechanism includes clamping blocks 8. Multiple fixing boxes 61 are fixedly connected to the arc surface of the outer surface of the positioning tube 6. The multiple fixing boxes 61 are evenly distributed in a ring and are all connected to the interior of the positioning tube 6. Multiple clamping blocks 8 are provided, each slidably connected to the interior of the multiple fixing boxes 61. The clamping blocks 8 are arc-shaped at their respective ends and have anti-slip grooves at their respective ends. Limiting grooves 62 are provided at opposite ends inside the multiple fixing boxes 61. Limiting blocks 82 are slidably connected inside the multiple limiting grooves 62 and are fixedly connected to both ends of the surface of the multiple clamping blocks 8. Inclined grooves 81 are provided on both symmetrical sides of the surface of the multiple clamping blocks 8. A horizontal moving groove 34 is provided inside the rotating roller 3. The moving groove 34 is coaxial with the rotating roller 3. A moving roller 7 is slidably connected inside the moving groove 34. The positioning tube 6 is slidably sleeved at the center of the moving roller 7. Multiple sliding grooves are provided inside the moving roller 7. The groove 74 has multiple fixed boxes 61 slidably connected inside the multiple grooves 74. Each of the multiple grooves 74 has two fixed posts 75 fixedly connected to opposite sides inside. Each pair of fixed posts 75 is slidably connected to two inclined grooves 81 on the surface of each clamping block 8. Multiple connecting rods 71 ​​are horizontally fixedly connected to one side of the surface of the moving roller 7. These connecting rods 71 ​​are slidably sleeved inside the rotating roller 3 and inserted through the surface of the rotating roller 3. A connecting ring 72 is horizontally slidably connected to one end of the rotating roller 3 near the moving frame 4. The connecting ring 72 is fixedly connected to one end of each connecting rod 71. A second spring 73 is sleeved on the surface of each connecting rod 71. One end of each second spring 73 is located on the surface of the rotating roller 3, and the other end is located on the surface of the connecting ring 72. These springs restrict the horizontal sliding of the moving roller 7 inside the rotating roller 3, thus restricting the sliding of the multiple clamping blocks 8, allowing the multiple clamping blocks 8 to clamp or release the drill bit.

[0018] Reference Figure 1 , Figure 7 and Figure 8In a preferred embodiment, the conveying mechanism includes a top rod 5, which is slidably connected to the center of the interior of the movable frame 4. A slide plate 52 is slidably connected inside the movable frame 4. The top rod 5 is fixedly connected to the center of one side of the surface of the slide plate 52. A slot 41 is opened through the bottom of the movable frame 4. A slider 51 is horizontally slidably connected to the bottom of the movable frame 4. The top of the slider 51 is slidably connected to the inside of the slot 41. The slide plate 52 is fixedly connected to the top of the slider 51. Two support plates 12 are vertically fixedly connected to the top of the base 1. The two ends of the movable frame 4 are respectively fixedly connected to the surfaces of the two support plates 12. A through-hole 13 is opened through the surface of one of the support plates 12, and the through-hole 13 communicates with the interior of the movable frame 4. Two sliding rods 14 are horizontally fixedly connected between the two support plates 12. Sliding sleeves 53 are slidably fitted on the surfaces of the two sliding rods 14. The two sliding sleeves 53 are fixedly connected to the surfaces of the slider 51. A lead screw 54 is horizontally rotatably connected between the two support plates 12. The two ends of the lead screw 54 are rotatably fitted inside the two support plates 12. The other support plate A second servo motor 55 is mounted on the surface of the support plate 12. The output end of the second servo motor 55 is fixedly connected to one end of the lead screw 54. The lead screw 54 is rotatably sleeved inside the slider 51. The slider 51 and the lead screw 54 cooperate with each other. A pressing block 9 is horizontally slidably connected between the two support plates 12. The pressing block 9 is set on the surface of the support plate 12 near one end of the housing 2. Multiple push rods 91 are horizontally fixedly connected to the surface of the pressing block 9. The multiple push rods 91 slide through the surface of one of the support plates 12. One end of the multiple push rods 91 is fixedly connected to... With the limit plate 92 connected, multiple limit plates 92 are corresponding to the surface of the connecting ring 72. The surfaces of the two slide rods 14 are each fitted with a first spring 15. One end of each of the two first springs 15 is set on the surface of the extrusion block 9, and the other end of each of the two first springs 15 is set on the surfaces of the two slide sleeves 53 respectively. This is used to limit the top rod 5 to slide horizontally inside the movable frame 4, so that the drill bit placed inside the movable frame 4 can be pushed into the positioning tube 6. At the same time, the drill bit pushed into the positioning tube 6 will be clamped, so that the drill bit can be picked up and put away.

[0019] In this invention, during actual use, the drill bit to be processed can be placed inside the moving frame 4. Then, the second servo motor 55 is controlled to drive the lead screw 54 to rotate. Under the constraint of the two sliding rods 14 and the sliding sleeve 53, the slider 51 will slide horizontally, and at the same time, the sliding plate 52 and the push rod 5 will slide, thus pushing the drill bit to be processed. Subsequently, the drill bit will be transported into the positioning tube 6. During the process, the sliding of the slider 51 and the two sliding sleeves 53 will compress the two first springs 15, thereby causing the extrusion block 9 to slide. At the same time, under the connection of multiple push rods 91 and limiting plates 92, the connecting ring 72 will be extruded, and multiple second springs 73 will also be compressed. Under the connection of multiple connecting rods 71, the extrusion block 9 will slide. The moving roller 7 slides, and the fixed posts 75 set inside the multiple grooves 74 will slide inside the two inclined grooves 81 on the surface of the clamping block 8, causing the multiple clamping blocks 8 to slide away from each other, so that the multiple clamping blocks 8 no longer clamp the drill bit inside the positioning tube 6. As the push rod 5 continues to push the drill bit, the drill bit that has been processed inside the positioning tube 6 will be squeezed out. At the same time, the drill bit that needs to be processed will be pushed into the positioning tube 6. After completion, the second servo motor 55 can be controlled to drive the lead screw 54 to reverse, so that the slide plate 52 and the push rod 5 slide back to their original positions. At the same time, under the action of multiple second springs 73, the moving roller 7 will also slide back to its original position, and the multiple clamping blocks 8 will also clamp the drill bit inside the positioning tube 6, so that the inserted drill bit can be processed.

[0020] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A turning device for machining a drill bit for repairing rectangular sections of anti-slide piles, comprising a base (1), characterized in that, A housing (2) is installed at one end of the top of the base (1). A rotating roller (3) is rotatably mounted inside the housing (2). The two ends of the rotating roller (3) are respectively located at both ends of the surface of the housing (2). A positioning tube (6) is rotatably mounted at the center of the rotating roller (3). A rotating mechanism for rotating the rotating roller (3) is provided inside the housing (2). A positioning mechanism is provided inside the positioning tube (6). A movable frame (4) is provided at the other end of the top of the base (1). The movable frame (4) is arc-shaped. The top of the movable frame (4) is open. The movable frame (4) is horizontal. One end of the movable frame (4) corresponds to the positioning tube (6). A conveying mechanism is provided inside the movable frame (4). The bottom of the base (1) is fixed. A bracket (11) is connected; the positioning mechanism includes a clamping block (8), and multiple fixing boxes (61) are fixedly connected to the arc surface of the outer surface of the positioning tube (6). The multiple fixing boxes (61) are evenly distributed in a ring, and all of the multiple fixing boxes (61) are connected to the inside of the positioning tube (6). Multiple clamping blocks (8) are provided, and the multiple clamping blocks (8) are slidably connected to the inside of the multiple fixing boxes (61). The multiple clamping blocks (8) are arranged in an arc shape at one end close to each other, and the multiple clamping blocks (8) are provided with anti-slip grooves at one end close to each other. Limiting grooves (62) are opened at opposite ends inside the multiple fixing boxes (61), and limiting blocks (82) are slidably connected inside the multiple limiting grooves (62). 2) Fixedly connected to both ends of the surfaces of multiple clamping blocks (8), with inclined grooves (81) symmetrically opened on both sides of the surfaces of multiple clamping blocks (8); a moving groove (34) is horizontally opened inside the rotating roller (3), the moving groove (34) is coaxially arranged with the rotating roller (3), a moving roller (7) is slidably connected inside the moving groove (34), the positioning tube (6) is slidably sleeved at the center inside the moving roller (7), multiple sliding grooves (74) are opened inside the moving roller (7), multiple fixed boxes (61) are slidably connected inside the multiple sliding grooves (74), fixed columns (75) are fixedly connected to opposite sides inside the multiple sliding grooves (74), the multiple fixed columns (75) are paired up, and each pair of fixed columns (75) The two inclined grooves (81) on the surface of each clamping block (8) are slidably connected to each other; a plurality of connecting rods (71) are horizontally fixedly connected to one side of the surface of the moving roller (7), and the plurality of connecting rods (71) are slidably sleeved inside the rotating roller (3), and the plurality of connecting rods (71) are inserted through the surface of the rotating roller (3). A connecting ring (72) is horizontally slidably connected to one end of the rotating roller (3) near the moving frame (4), and the connecting ring (72) is fixedly connected to one end of the plurality of connecting rods (71). A second spring (73) is sleeved on the surface of the plurality of connecting rods (71), and one end of the plurality of second springs (73) is set on the surface of the rotating roller (3), and the other end of the plurality of second springs (73) is set on the surface of the connecting ring (72).

2. The turning device for machining the rectangular section of the anti-slide pile according to claim 1, characterized in that, The rotating mechanism includes a speed-changing gear set (32), and a mounting box (21) is provided at the bottom of the base (1). The mounting box (21) is fixedly connected to the bottom of the chassis (2). An external gear ring (31) is coaxially sleeved on the outer surface of the rotating roller (3). The external gear ring (31) is rotatably sleeved inside the chassis (2). The speed-changing gear set (32) is installed inside the mounting box (21). The speed-changing gear set (32) and the external gear ring (31) mesh with each other. A first servo motor (33) is provided at the bottom of the base (1). The first servo motor (33) is installed on the surface of the mounting box (21). The output end of the first servo motor (33) is fixedly connected to the center of the input gear surface in the speed-changing gear set (32).

3. The turning device for machining the rectangular section of the anti-slide pile according to claim 2, characterized in that, The conveying mechanism includes a top rod (5), which is slidably connected to the center of the inside of the movable frame (4). A slide plate (52) is slidably connected inside the movable frame (4). The top rod (5) is fixedly connected to the center of one side of the surface of the slide plate (52). A slot (41) is opened through the bottom of the movable frame (4). A slider (51) is slidably connected horizontally to the bottom of the movable frame (4). The top of the slider (51) is slidably connected to the inside of the slot (41). The slide plate (52) is fixedly connected to the top of the slider (51).

4. The turning device for machining the rectangular section of the anti-slide pile according to claim 3, characterized in that, The base (1) has two support plates (12) vertically fixedly connected to its top. The two ends of the movable frame (4) are fixedly connected to the surfaces of the two support plates (12). One of the support plates (12) has a through-hole (13) on its surface. The through-hole (13) is connected to the interior of the movable frame (4). Two sliding rods (14) are horizontally fixedly connected between the two support plates (12). Sliding sleeves (53) are slidably fitted on the surfaces of the two sliding rods (14). The two sliding sleeves (53) are fixedly connected to the surface of the slider (51).

5. The turning device for machining the rectangular section of the anti-slide pile according to claim 4, characterized in that, A lead screw (54) is horizontally rotatably connected between the two support plates (12). The two ends of the lead screw (54) are respectively rotatably sleeved inside the two support plates (12). A second servo motor (55) is installed on the surface of the other support plate (12). The output end of the second servo motor (55) is fixedly connected to one end of the lead screw (54). The lead screw (54) is rotatably sleeved inside the slider (51). The slider (51) and the lead screw (54) cooperate with each other.

6. The turning device for machining the rectangular section of the anti-slide pile according to claim 5, characterized in that, A pressing block (9) is horizontally slidably connected between the two support plates (12). The pressing block (9) is disposed on the surface of the support plate (12) near the end of the chassis (2). A plurality of push rods (91) are horizontally fixedly connected to the surface of the pressing block (9). The plurality of push rods (91) are slidably inserted into the surface of one of the support plates (12). One end of the plurality of push rods (91) is fixedly connected to a limiting piece (92). The plurality of limiting pieces (92) are corresponding to the surface of the connecting ring (72). A first spring (15) is sleeved on the surface of the two slide rods (14). One end of the two first springs (15) is disposed on the surface of the pressing block (9), and the other end of the two first springs (15) is disposed on the surface of the two slide sleeves (53).

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