Discharging device capable of conveniently clamping special-shaped workpieces

Abstract

The utility model discloses a blanking device capable of conveniently clamping special-shaped workpieces, which belongs to the technical field of clamping equipment and is characterized in that an equipment main body is connected with a driving clamping mechanism, and a locking mechanism is mounted on the driving clamping mechanism; the locking mechanism comprises a fixing assembly, a moving assembly and a clamping assembly, the fixing assembly is connected with the moving assembly and the clamping assembly, and the fixing assembly and the clamping assembly are connected with the driving clamping mechanism. By means of the mode, positioning of the clamping end of the special-shaped workpiece is achieved, and the function of clamping the workpiece from three directions is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping equipment, in particular to a feeding device which is convenient for clamping special-shaped workpieces. Background Art

[0002] In the automated production line, the assembly of the main chassis of the rotary tiller is generally driven by a double-speed chain. After assembly, it needs to be transferred to the unloading station. Due to the large size and weight of the main chassis, it is not convenient to unload the material (such as Figure 1 shown).

[0003] For example, Chinese patent CN210147491U discloses a clamping device for valve processing, including a fixed plate, a turntable is rotatably installed on the side wall of the fixed plate, a mounting frame is fixed on the top of the fixed plate, a first fastening screw is interactively connected to the mounting frame, a rectangular groove is opened on the side wall of the turntable away from the fixed plate, a gear is rotatably installed in the middle of the inner cavity of the rectangular groove, two racks are movably connected to the inner wall of the rectangular groove, the racks and the gears are meshed with each other, a straight plate is fixed at one end of the racks away from each other, a limit plate is fixed on the top of the straight plate, and a fourth fastening screw is movably provided on the side wall of the limit plate.

[0004] However, the technology has the following problems: it is unable to position and clamp a specific clamping end of a special-shaped workpiece, and to perform lifting and unloading operations.

[0005] Based on this, the utility model designs a feeding device which is convenient for clamping special-shaped workpieces to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a feeding device which is convenient for clamping special-shaped workpieces.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A material unloading device for conveniently clamping a special-shaped workpiece comprises a device body, the device body is connected to a driving clamping mechanism, and a locking mechanism is installed on the driving clamping mechanism;

[0009] The locking mechanism comprises a fixed component, a movable component and a clamping component. The fixed component is connected to the movable component and the clamping component. The fixed component and the clamping component are connected to the driving clamping mechanism.

[0010] Furthermore, the main body of the equipment includes a vertical pole, a suspension rope, a rotating rod, a cross beam, a motor and a linear module slide. The motor is fixedly installed on the upper end of the vertical pole, and the output end of the motor is fixedly connected to the rotating rod. The upper end of the vertical pole is rotatably connected to both ends of the rotating rod, the lower end of the rotating rod is fixedly connected to the cross beam, the lower end of the cross beam is fixedly connected to the linear module slide, the output end of the linear module slide is fixedly connected to the upper end of the suspension rope, and two suspension ropes are provided and both are connected to the driving clamping mechanism.

[0011] Furthermore, the driving clamping mechanism includes a cylinder, a mounting frame, a lock, a trapezoidal block, a protrusion, a tripod, a slide groove and a clamping plate. The cylinder is fixedly installed in the middle position of the top of the mounting frame. Two lock buckles are provided and are respectively fixedly installed on the left and right sides of the mounting frame. The two lock buckles are detachably connected to the lower ends of the two suspension ropes respectively. The output end of the cylinder is fixedly connected to the upper end of the trapezoidal block. The protrusion is fixedly installed on the left side of the trapezoidal block. The tripod is located inside the mounting frame and is slidably connected to the inner side wall of the left end of the mounting frame. The slide groove is opened on the right side of the tripod. The slide groove is slidably connected to the protrusion, and the bottom of the tripod is fixedly connected to the upper end of the clamping plate.

[0012] Furthermore, the protrusions, tripods, slide grooves and clamping plates are provided in two groups and are respectively located on the left and right sides of the trapezoidal block.

[0013] Furthermore, the clamping plate is connected to both the fixing assembly and the clamping assembly.

[0014] Furthermore, the fixed component, the movable component and the clamping component are each provided with two groups and are respectively installed on the clamping plates on the left and right sides.

[0015] Furthermore, taking the fixed component on the left side as an example, the fixed component includes a mounting plate, a slot, a fixed cylinder, a sleeve, an arc-shaped groove and a through hole. The mounting plate is fixedly installed on the right end of the left clamping plate, the slot is opened at the center position of the mounting plate, the fixed cylinder is slidingly connected to the slot, the through hole is opened at the bottom center position of the slot, the sleeve is fixedly connected to the bottom of the slot and communicated with the outside world through the through hole, the arc-shaped groove is provided with two and is respectively opened on the left and right sides of the sleeve, the mounting plate, the fixed cylinder, the sleeve, and the arc-shaped groove are all connected to the movable component, and the mounting plate and the fixed cylinder are both connected to the clamping component.

[0016] Furthermore, taking the moving component on the left side as an example, the moving component includes a Z-shaped slider, a fixed block, a sliding rod, a spring and a through groove, the through groove is opened on the sliding rod and is connected to the two arc grooves, the sliding rod is slidably connected to the sleeve, the side wall of the Z-shaped slider is slidably connected to the through groove, the left and right ends of the Z-shaped slider are respectively slidably connected to the arc grooves on the left and right sides, the fixed block is provided with two and fixedly installed on the left and right ends inside the fixed cylinder, the inclined surfaces of the two fixed blocks are arranged in parallel and the inclination angles of the inclined surfaces are the same, the side walls of the two fixed blocks are respectively fitted and slidably connected to the left and right ends of the Z-shaped slider, the upper end of the sliding rod is fixedly connected to one end of the spring, and the other end of the spring is connected to the clamping component.

[0017] Furthermore, taking the clamping assembly on the left side as an example, the clamping assembly includes an arc-shaped positioning plate, a clamping block, a mounting block, a moving rod, a connecting rod and an oblique groove. The arc surface of the arc-shaped positioning plate is fitted and connected with the arc surface at the clamping end, the left side wall of the arc-shaped positioning plate is slidably connected with the right end of the left clamping plate, and the lower end of the arc-shaped positioning plate is respectively fixedly connected with the spring and the fixing tube. There are two oblique grooves and both are opened on the mounting plate. The two oblique grooves are mirror-set. There are two clamping blocks and are respectively slidably connected with the two oblique grooves. There are two connecting rods and are respectively fixedly connected with the inner sides of the bottom ends of the two clamping blocks. The mounting block is fixedly installed on the lower end of the sliding rod. There are two moving rods and are respectively fixedly installed on the front and rear ends of the mounting block. The two moving rods are respectively slidably connected with the inner walls of the two connecting rods.

[0018] The utility model has the following technical effects:

[0019] When the utility model is in use, the driving clamping mechanism is installed on the equipment body, the equipment body aligns the driving clamping mechanism with the workpiece position, the driving clamping mechanism is adjusted to a clamping size suitable for the special-shaped workpiece, and then the clamping component positions and clamps the clamping position of the workpiece, the equipment body drives the driving clamping mechanism to lift, and then under the action of the moving component, the clamping component clamps and fixes the workpiece. The utility model realizes the positioning of the clamping end of the special-shaped workpiece and the function of clamping the workpiece from three directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the automated production line for the main chassis of a rotary tiller;

[0022] Figure 2This is a three-dimensional diagram of a material unloading device for conveniently clamping special-shaped workpieces according to the utility model;

[0023] Figure 3 The driving clamping mechanism of the utility model is three-dimensional Figure 1 ;

[0024] Figure 4 It is a front view of the driving and clamping mechanism of the utility model;

[0025] Figure 5 It is a left side view of the driving and clamping mechanism of the utility model;

[0026] Figure 6 The three-dimensional driving clamping mechanism of the utility model Figure 2 ;

[0027] Figure 7 For along Figure 5 AA direction cross-sectional view;

[0028] Figure 8 for Figure 2 The enlarged view of the workpiece B;

[0029] Fig. 9 for Figure 6 Enlarged view of point C in the middle;

[0030] Fig.10 for Figure 7 Enlarged view of point D in the middle.

[0031] The numbers in the figure represent:

[0032] 1. Equipment body; 11. Vertical pole; 12. Lifting rope; 13. Rotating rod; 14. Crossbeam; 15. Motor; 16. Linear module slide; 2. Driving clamping mechanism; 21. Cylinder; 22. Mounting frame; 23. Locking buckle; 24. Trapezoidal block; 25. Bump; 26. Tripod; 27. Slide; 28. Clamping plate; 3. Locking mechanism; 31. Fixing assembly; 311. Mounting plate; 312. Notch; 313, fixed cylinder; 314, sleeve; 315, arc groove; 316, through hole; 32, moving assembly; 321, Z-shaped slider; 322, fixed block; 323, slide rod; 324, spring; 325, through groove; 33, clamping assembly; 331, arc positioning plate; 332, clamping block; 333, mounting block; 334, moving rod; 335, connecting rod; 336, inclined groove; 4, clamping end. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The utility model is further described below in conjunction with embodiments.

[0035] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0036] Example 1

[0037] Please refer to the instruction manual Figure 1-10 , a feeding device for conveniently clamping a special-shaped workpiece, comprising a device body 1, the device body 1 is connected to a driving clamping mechanism 2, and a locking mechanism 3 is installed on the driving clamping mechanism 2;

[0038] The locking mechanism 3 includes a fixed component 31 , a movable component 32 and a clamping component 33 . The fixed component 31 , the movable component 32 and the clamping component 33 are all connected. The fixed component 31 and the clamping component 33 are all connected to the driving clamping mechanism 2 .

[0039] When the utility model is in use, the driving clamping mechanism 2 is installed on the equipment body 1, the equipment body 1 aligns the driving clamping mechanism 2 with the workpiece position, the driving clamping mechanism 2 is adjusted to a clamping size suitable for the special-shaped workpiece, and then the clamping component 33 positions and clamps the clamping position of the workpiece, the equipment body 1 drives the driving clamping mechanism 2 to lift, and then under the action of the moving component 32, the clamping component 33 clamps and fixes the workpiece. The utility model realizes the positioning of the clamping end of the special-shaped workpiece and the function of clamping the workpiece from three directions.

[0040] Example 2

[0041] like Figure 1-10 As shown, as a preferred embodiment of the utility model, the equipment body 1 includes a vertical pole 11, a suspension rope 12, a rotating rod 13, a cross beam 14, a motor 15 and a linear module slide 16, the motor 15 is fixedly installed on the upper end of the vertical pole 11, the output end of the motor 15 is fixedly connected to the rotating rod 13, the upper end of the vertical pole 11 and both ends of the rotating rod 13 are rotatably connected, the lower end of the rotating rod 13 is fixedly connected to the cross beam 14, the lower end of the cross beam 14 is fixedly connected to the linear module slide 16, the output end of the linear module slide 16 is fixedly connected to the upper end of the suspension rope 12, and two suspension ropes 12 are provided and both are connected to the driving clamping mechanism 2.

[0042] The driving clamping mechanism 2 includes a cylinder 21, a mounting frame 22, a lock 23, a trapezoidal block 24, a protrusion 25, a tripod 26, a slide 27 and a clamping plate 28. The cylinder 21 is fixedly installed at the top middle position of the mounting frame 22. Two locks 23 are provided and are fixedly installed on the left and right sides of the mounting frame 22 respectively. The two locks 23 are detachably connected to the lower ends of the two suspension ropes 12 respectively. The output end of the cylinder 21 is fixedly connected to the upper end of the trapezoidal block 24. The protrusion 25 is fixedly installed on the left side of the trapezoidal block 24. The tripod 26 is located inside the mounting frame 22 and is slidably connected to the inner side wall of the left end of the mounting frame 22. The slide 27 is opened on the right side of the tripod 26. The slide 27 is slidably connected to the protrusion 25. The bottom of the tripod 26 is fixedly connected to the upper end of the clamping plate 28.

[0043] The protrusions 25 , the tripods 26 , the slide slots 27 , and the clamping plates 28 are provided in two groups and are respectively located on the left and right sides of the trapezoidal block 24 .

[0044] The clamping plate 28 is connected to both the fixing assembly 31 and the clamping assembly 33 .

[0045] When the utility model is in use, the motor 15 adjusts the crossbeam 14 to a suitable position, the linear module slide 16 moves the suspension rope 12 to a suitable position, and the mounting frame 22 is installed on the two suspension ropes 12 through two lock buckles 23. Then the linear module slide 16 drives the mounting frame 22 to reach the clamping position, and the mounting frame 22 drives the arc-shaped end of the arc-shaped positioning plate 331 to align with the arc-shaped part of the clamping end of the special-shaped workpiece. The cylinder 21 is started, and the cylinder 21 drives the trapezoidal block 24 to move. The trapezoidal block 24 drives the two tripods 26 to move toward each other until the two tripods 26 move to a suitable position, and the tripod 26 drives the arc-shaped positioning plate 331 to clamp the arc-shaped end 4 of the special-shaped workpiece.

[0046] Example 3

[0047] like Figure 1-10 As shown, as a preferred embodiment of the present utility model, the fixing assembly 31, the moving assembly 32, and the clamping assembly 33 are each provided with two groups and are respectively installed on the clamping plates 28 on the left and right sides.

[0048] Taking the fixed component 31 on the left side as an example, the fixed component 31 includes a mounting plate 311, a notch 312, a fixed cylinder 313, a sleeve 314, an arc groove 315 and a through hole 316. The mounting plate 311 is fixedly installed on the right end of the left clamping plate 28. The notch 312 is opened at the center position of the mounting plate 311. The fixed cylinder 313 is slidably connected to the notch 312. The through hole 316 is opened at the bottom center position of the notch 312. The sleeve 314 is fixedly connected to the bottom of the notch 312 and communicates with the outside through the through hole 316. The arc groove 315 is provided with two and is respectively opened on the left and right sides of the sleeve 314. The mounting plate 311, the fixed cylinder 313, the sleeve 314, and the arc groove 315 are all connected to the moving component 32, and the mounting plate 311 and the fixed cylinder 313 are all connected to the clamping component 33.

[0049] Taking the moving component 32 on the left side as an example, the moving component 32 includes a Z-shaped slider 321, a fixed block 322, a sliding rod 323, a spring 324 and a through slot 325. The through slot 325 is opened on the sliding rod 323 and is connected to the two arc-shaped slots 315. The sliding rod 323 is slidably connected to the sleeve 314. The side wall of the Z-shaped slider 321 is slidably connected to the through slot 325. The left and right ends of the Z-shaped slider 321 are respectively slidably connected to the arc-shaped slots 315 on the left and right sides. The fixed block 322 is provided with two and fixedly installed on the left and right ends inside the fixed cylinder 313. The inclined surfaces of the two fixed blocks 322 are arranged in parallel and the inclination angles of the inclined surfaces are the same. The side walls of the two fixed blocks 322 are respectively fitted and slidably connected to the left and right ends of the Z-shaped slider 321. The upper end of the sliding rod 323 is fixedly connected to one end of the spring 324, and the other end of the spring 324 is connected to the clamping component 33.

[0050] Taking the left clamping assembly 33 as an example, the clamping assembly 33 includes an arc-shaped positioning plate 331, a clamping block 332, a mounting block 333, a moving rod 334, a connecting rod 335 and an inclined groove 336. The arc surface of the arc-shaped positioning plate 331 is fitted and connected with the arc surface at the clamping end 4. The left side wall of the arc-shaped positioning plate 331 is slidably connected with the right end of the left clamping plate 28. The lower end of the arc-shaped positioning plate 331 is fixedly connected with the spring 324 and the fixing cylinder 313 respectively. The inclined groove 336 has two The two bevel grooves 336 are arranged in a mirror image, the clamping block 332 is provided with two and are respectively slidably connected to the two bevel grooves 336, the connecting rod 335 is provided with two and is respectively fixedly connected to the inner sides of the bottom ends of the two clamping blocks 332, the mounting block 333 is fixedly installed at the lower end of the sliding rod 323, the moving rod 334 is provided with two and is respectively fixedly installed at the front and rear ends of the mounting block 333, and the two moving rods 334 are respectively slidably connected to the inner walls of the two connecting rods 335.

[0051] When the utility model is in use, after the arc-shaped positioning plate 331 clamps the clamping end 4 of the special-shaped workpiece, the linear module slide 16 drives the mounting frame 22 to move, and the clamping plate 28 moves upward accordingly, and the clamping plate 28 drives the arc-shaped positioning plate 331 to move upward, and then the arc-shaped end of the special-shaped workpiece will squeeze the arc-shaped positioning plate 331, and the arc-shaped positioning plate 331 moves downward, and the arc-shaped positioning plate 331 drives the fixing cylinder 313 to move downward, and the fixing cylinder 313 drives the two fixing blocks 322 to move downward. 2 slides in contact with the left and right side walls of the Z-shaped slider 321, so the Z-shaped slider 321 moves upward along the side walls of the two fixing blocks 322, the side walls of the Z-shaped slider 321 drive the sliding rod 323 to move upward, the sliding rod 323 drives the mounting block 333 to move upward, the moving rod 334 moves upward accordingly, the moving rod 334 slides in the connecting rod 335, thereby driving the connecting rod 335 to move upward, so the two clamping blocks 332 move upward accordingly, and the arc-shaped positioning plate 331 clamps and fixes the arc-shaped end 4 of the special-shaped workpiece.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material unloading device for conveniently clamping a special-shaped workpiece, comprising a device body (1), characterized in that: The device body (1) is connected to a driving and clamping mechanism (2), and a locking mechanism (3) is installed on the driving and clamping mechanism (2); The locking mechanism (3) comprises a fixed component (31), a movable component (32) and a clamping component (33); the fixed component (31), the movable component (32) and the clamping component (33) are all connected; and the fixed component (31) and the clamping component (33) are both connected to the driving clamping mechanism (2).

2. The unloading device for conveniently clamping special-shaped workpieces according to claim 1 is characterized in that: The device body (1) comprises a vertical pole (11), a suspension rope (12), a rotating rod (13), a cross beam (14), a motor (15) and a linear module slide (16); the motor (15) is fixedly mounted on the upper end of the vertical pole (11); the output end of the motor (15) is fixedly connected to the rotating rod (13); the upper end of the vertical pole (11) and both ends of the rotating rod (13) are rotatably connected; the lower end of the rotating rod (13) is fixedly connected to the cross beam (14); the lower end of the cross beam (14) is fixedly connected to the linear module slide (16); the output end of the linear module slide (16) is fixedly connected to the upper end of the suspension rope (12); two suspension ropes (12) are provided and both are connected to the driving clamping mechanism (2).

3. The unloading device for conveniently clamping special-shaped workpieces according to claim 2 is characterized in that: The driving clamping mechanism (2) comprises a cylinder (21), a mounting frame (22), a lock (23), a trapezoidal block (24), a protrusion (25), a tripod (26), a slide groove (27) and a clamping plate (28), wherein the cylinder (21) is fixedly mounted at the top middle position of the mounting frame (22), two locks (23) are provided and are respectively fixedly mounted on the left and right sides of the mounting frame (22), and the two locks (23) are respectively connected to the lower ends of the two suspension ropes (12). The output end of the cylinder (21) is fixedly connected to the upper end of the trapezoidal block (24), the protrusion (25) is fixedly installed on the left side of the trapezoidal block (24), the tripod (26) is located inside the mounting frame (22) and is slidably connected to the inner side wall of the left end of the mounting frame (22), the slide groove (27) is opened on the right side of the tripod (26), the slide groove (27) is slidably connected to the protrusion (25), and the bottom of the tripod (26) is fixedly connected to the upper end of the clamping plate (28).

4. The unloading device for conveniently clamping special-shaped workpieces according to claim 3 is characterized in that: The protrusion (25), the tripod (26), the slide groove (27), and the clamping plate (28) are each provided with two groups and are respectively located on the left and right sides of the trapezoidal block (24).

5. The unloading device for conveniently clamping special-shaped workpieces according to claim 4 is characterized in that: The clamping plate (28) is connected to both the fixing assembly (31) and the clamping assembly (33).

6. The unloading device for conveniently clamping special-shaped workpieces according to claim 5 is characterized in that: The fixed assembly (31), the movable assembly (32) and the clamping assembly (33) are each provided with two groups and are respectively installed on the clamping plates (28) on the left and right sides.

7. The unloading device for conveniently clamping special-shaped workpieces according to claim 6 is characterized in that: Taking the left fixing assembly (31) as an example, the fixing assembly (31) comprises a mounting plate (311), a notch (312), a fixing cylinder (313), a sleeve (314), an arc groove (315) and a through hole (316). The mounting plate (311) is fixedly mounted on the right end of the left clamping plate (28). The notch (312) is opened at the center position of the mounting plate (311). The fixing cylinder (313) is slidably connected to the notch (312). The through hole (316) is opened at the notch. The bottom center position of the notch (312), the sleeve (314) is fixedly connected to the bottom of the notch (312) and communicates with the outside through the through hole (316), the arc groove (315) is provided with two and is respectively opened on the left and right sides of the sleeve (314), the mounting plate (311), the fixed cylinder (313), the sleeve (314), and the arc groove (315) are all connected to the moving component (32), and the mounting plate (311) and the fixed cylinder (313) are all connected to the clamping component (33).

8. The unloading device for conveniently clamping special-shaped workpieces according to claim 7 is characterized in that: Taking the moving assembly (32) on the left side as an example, the moving assembly (32) includes a Z-shaped slider (321), a fixing block (322), a sliding rod (323), a spring (324) and a through slot (325). The through slot (325) is provided on the sliding rod (323) and is connected to the two arc-shaped slots (315). The sliding rod (323) is slidably connected to the sleeve (314). The side wall of the Z-shaped slider (321) is slidably connected to the through slot (325). The left and right ends of the Z-shaped slider (321) are respectively connected to the through slot (325). The arc grooves (315) on the left and right sides are slidably connected, two fixed blocks (322) are provided and fixedly installed at the left and right ends inside the fixed cylinder (313), the inclined surfaces of the two fixed blocks (322) are arranged in parallel and the inclination angles of the inclined surfaces are the same, the side walls of the two fixed blocks (322) are respectively fitted and slidably connected with the left and right ends of the Z-shaped sliding block (321), the upper end of the sliding rod (323) is fixedly connected to one end of the spring (324), and the other end of the spring (324) is connected to the clamping assembly (33).

9. The unloading device for conveniently clamping special-shaped workpieces according to claim 8, characterized in that: Taking the left clamping assembly (33) as an example, the clamping assembly (33) comprises an arc-shaped positioning plate (331), a clamping block (332), a mounting block (333), a moving rod (334), a connecting rod (335) and an inclined groove (336). The arc surface of the arc-shaped positioning plate (331) is fitted and connected with the arc surface at the clamping end (4). The left side wall of the arc-shaped positioning plate (331) is slidably connected with the right end of the left clamping plate (28). The lower end of the arc-shaped positioning plate (331) is fixedly connected with the spring (324) and the fixing cylinder (313) respectively. The inclined groove (336) ) are provided with two and both are opened on the mounting plate (311), the two inclined grooves (336) are arranged in a mirror image, the clamping block (332) is provided with two and is respectively slidably connected to the two inclined grooves (336), the connecting rod (335) is provided with two and is respectively fixedly connected to the inner side of the bottom end of the two clamping blocks (332), the mounting block (333) is fixedly installed at the lower end of the sliding rod (323), the moving rod (334) is provided with two and is respectively fixedly installed at the front and rear ends of the mounting block (333), and the two moving rods (334) are respectively slidably connected to the inner walls of the two connecting rods (335).

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