Drill floor device for machining mechanical transmission accessories

Abstract

The invention relates to the technical field of accessory machining, and discloses a drill floor device for mechanical transmission accessory machining, the drill floor device comprises a workbench and a drilling assembly, a cooling device and a depth positioning device are arranged on the left side surface and the right side surface of the workbench respectively, the depth positioning device comprises a fixing frame, and a straight groove is formed in the inner side of the fixing frame; when the accessory is punched, firstly, a hydraulic rod pushes a movable plate and a drilling assembly to move downwards till a drill bit makes contact with the accessory, a rotary disc is rotated to promote a threaded rod to rotate, a connecting block and a limiting plate are driven to move, and the distance between a touch sensor at the bottom of the movable plate and the limiting plate is adjusted by observing scale display on scale marks; when the punching depth is consistent with the punching depth, the rotary table stops rotating, a drill rod in the drilling assembly is started, and drilling is stopped once a touch sensor makes contact with a limiting plate and makes a sound, so that the punching depth of each time can be effectively kept consistent, and the situation that products are unqualified due to inconsistent punching depths is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of accessories processing, in particular to a drilling platform device for processing mechanical transmission accessories. Background Art

[0002] Mechanical transmission accessories are components of mechanical transmission systems, used to transmit power, change the speed, direction or form of movement to ensure the normal operation of mechanical equipment. Gears are a typical mechanical transmission accessory that transmits power and motion through the meshing of gear teeth. Depending on the tooth shape, they can be divided into involute gears, cycloid gears, etc.

[0003] After searching, the applicant found that a Chinese patent disclosed "a drilling processing device for mechanical accessories", and its publication (announcement) number is "CN218487247U". The patent mainly includes a machine body, a support platform fastened to the top of the machine body and a clamp arranged on the top of the machine body. The front side of the support platform is fastened with a support plate. The drilling processing device for mechanical accessories, through the cooperation of the cross plate and the diameter of the central axis, can drive the cross plate to push the central axis by adjusting the movable column. At this time, the displacement of the central axis will change the position of the drill rod by driving the movable plate, which facilitates the operation of the drill rod to drill different positions of the material. However, in the above-mentioned prior art, there is a disadvantage of uncontrollable drilling depth in mechanical drilling processing, and it is difficult to accurately position the drilling depth of the accessories. The aperture size does not meet the requirements, which will have an adverse effect on the accessories. For this reason, we propose a drilling table device for processing mechanical transmission accessories. Summary of the Invention

[0004] The purpose of the present invention is to provide a drilling platform device for processing mechanical transmission accessories, so as to solve the problems in the above-mentioned prior art proposed in the above-mentioned background technology, in which the drilling depth is uncontrollable in mechanical drilling processing, and it is difficult to accurately position the drilling depth of the accessories, and the hole size does not meet the requirements, which will have an adverse effect on the accessories.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A drilling table device for processing mechanical transmission accessories, comprising a workbench and a drilling assembly, wherein the left and right side surfaces of the workbench are respectively provided with a cooling device and a depth positioning device, wherein the depth positioning device comprises a fixed frame, wherein a straight groove is provided on the inner side of the fixed frame, wherein the interior of the straight groove is connected with a connecting block, a sliding block and a turntable via a threaded rod, wherein the fixed frame is connected with a movable plate via a hydraulic rod, wherein the surface of the connecting block is fixedly connected with a limiting plate, and a touch sensor is fixedly installed on the bottom of the movable plate close to the threaded rod, and the inner surface of the fixed frame is provided with scale lines.

[0006] As a preferred solution, support columns are fixedly installed at the four corners of the bottom of the workbench, and a base plate is fixedly installed at one end of the four groups of support columns away from the workbench. A water tank is provided on the front and rear surfaces of the workbench, a drainage hole is provided on one side of the water tank, and a rotating clamping device is provided above the base plate.

[0007] As a preferred solution, the fixed frame is fixedly installed on the right side of the surface of the workbench, the threaded rod is rotatably connected to the inner wall of the straight groove, and the upper end extends to the top of the fixed frame, the turntable is fixedly installed on the top of the threaded rod, the connecting block is threadedly connected to the circumferential surface of the threaded rod, the sliding block is slidably connected to the circumferential surface of the threaded rod and is located above the connecting block, the movable plate is fixedly connected to the sliding block, and the movable plate is slidably connected to the inner surface of the fixed frame.

[0008] As a preferred solution, the hydraulic rod is fixedly installed on the top of the fixed frame, the top of the movable plate is fixedly connected to the output end of the hydraulic rod, and the drilling assembly is fixedly installed on the bottom front end of the movable plate.

[0009] As a preferred solution, the cooling device includes a mounting frame, the mounting frame is connected to a water outlet pipe through a water tank, the water outlet pipe is connected to a drain pipe through a water pump, and a nozzle is fixedly installed at one end of the drain pipe away from the water pump.

[0010] As a preferred solution, the mounting bracket is fixedly installed on the left end of the surface of the workbench, the water tank is fixedly installed on the left outer surface of the mounting bracket, one end of the water outlet pipe is fixedly connected to the water tank and extends into the interior thereof, and the other end thereof is fixedly connected to the input end of the water pump, a mounting seat is fixedly installed on the left outer surface of the mounting bracket, the water pump is fixedly installed inside the mounting seat, a fixing block is fixedly installed on the top of the mounting bracket, the drain pipe is fixedly installed inside the fixing block, and one end of the drain pipe is fixedly connected to the output end of the water pump.

[0011] As a preferred solution, the rotating clamping device includes a rotating motor fixedly mounted on the surface of the base plate, a rotating shaft fixedly mounted on the output end of the rotating motor, a driving gear fixedly mounted on the end of the rotating shaft away from the rotating motor, a rotating column rotatably connected at the axis of the surface of the base plate, and a driven gear, a fixed plate and a positioning plate fixedly mounted on the circumferential surface of the rotating column in sequence from bottom to top.

[0012] As a preferred solution, the positioning plate is arranged at the axis center above the surface of the workbench, and a plurality of connecting rods distributed in a circular array are fixedly installed between the fixed plate and the positioning plate. A plurality of positioning grooves are provided on the surface of the positioning plate, and a straight rod is fixedly connected to the inside of the positioning groove. A telescopic spring is sleeved on the surface of the straight rod, one end of the telescopic spring is fixedly connected to the inner wall of the positioning groove, and the other end thereof is fixedly connected to a slider, and the slider is slidably connected to the circumferential surface of the straight rod, and a clamping piece is fixedly installed on the surface of the slider.

[0013] Technical effects and advantages of the present invention:

[0014] 1. By setting a depth positioning device, when it is necessary to drill a hole in the accessory, the hydraulic rod is first extended to push the movable plate and the drilling assembly downward until the drill bit in the drilling assembly contacts the surface of the accessory. Then, the turntable is rotated according to the set drilling depth value, causing the threaded rod to rotate, thereby driving the connecting block and the limit plate to move. By observing the scale display on the scale line, the distance between the touch sensor at the bottom of the movable plate and the limit plate is adjusted to match the drilling depth, and then the turntable is stopped. Subsequently, the drill rod in the drilling assembly is started, and the hydraulic rod is kept pushing downward. During the drilling process, once the touch sensor contacts the limit plate and makes a sound, drilling is stopped immediately. This design can effectively ensure that the depth of each hole is consistent, avoiding the occurrence of unqualified products due to inconsistent drilling depth.

[0015] 2. By setting up a depth positioning device, first, by pulling multiple clamping pieces, the telescopic springs are all forced to contract, and the accessory to be processed is placed on the surface of the positioning plate. Then, the clamping piece is released, and the telescopic spring returns to drive the clamping piece to contact the accessory, completing the clamping and fixing. The accessory is drilled through the drilling assembly. Subsequently, by starting the rotating motor, the rotating shaft and the driving gear are driven to rotate, and the driven gear drives the rotating column to rotate, so that the positioning plate and the accessory rotate, and drilling is performed at another position, avoiding manual operation and improving work efficiency.

[0016] 3. By setting up a cooling device, during the drilling process, the water pump is started to pump out the water in the water tank through the outlet pipe, and then passes through the water pump and drain pipe in sequence, and finally the water is evenly sprayed on the connection between the drill bit and the accessories through the nozzle. During the drilling process, a lot of heat will be generated. The cooling device is used to reduce the temperature of the drill bit and accessories to prevent local overheating and damage to the accessories. The sprayed water flows to the sink and is finally discharged through the drain hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2This is a schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0019] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the depth positioning device of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the rotary clamping device of the present invention;

[0022] Figure 6 It is a partial structural schematic diagram of the rotary clamping device of the present invention;

[0023] Figure 7 It is a schematic structural diagram of the cooling device of the present invention.

[0024] In the figure: 1. Workbench; 2. Support column; 3. Bottom plate; 4. Drilling assembly; 5. Depth positioning device; 6. Rotating clamping device; 7. Cooling device; 8. Water tank; 501. Fixing frame; 502. Straight groove; 503. Threaded rod; 504. Scale line; 505. Connecting block; 506. Sliding block; 507. Limiting plate; 508. Moving plate; 509. Hydraulic rod; 510. Turntable; 511. Touch sensor; 601. Rotating motor; 60 2. Rotating shaft; 603. Driving gear; 604. Rotating column; 605. Driven gear; 606. Fixed plate; 607. Connecting rod; 608. Positioning plate; 609. Positioning slot; 610. Straight rod; 611. Telescopic spring; 612. Slider; 613. Clamping piece; 701. Mounting frame; 702. Water tank; 703. Water outlet pipe; 704. Mounting seat; 705. Water pump; 706. Drain pipe; 707. Fixing block; 708. Sprinkler. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1:

[0027] Please see the attached Figure 1 - Attachment Figure 4, a drilling table device for processing mechanical transmission accessories, including a workbench 1 and a drilling assembly 4, a cooling device 7 and a depth positioning device 5 are respectively provided on the left and right surfaces of the workbench 1, the depth positioning device 5 includes a fixed frame 501, a straight groove 502 is opened on the inner side of the fixed frame 501, the interior of the straight groove 502 is connected to a connecting block 505, a sliding block 506 and a turntable 510 through a threaded rod 503, the fixed frame 501 is connected to a movable plate 508 through a hydraulic rod 509, the surface of the connecting block 505 is fixedly connected to a limit plate 507, and a touch sensor 511 is fixedly installed on the bottom of the movable plate 508 close to the threaded rod 503, and a scale line 504 is provided on the inner surface of the fixed frame 501, support columns 2 are fixedly installed at the four corners of the bottom of the workbench 1, and a bottom plate 3 is fixedly installed on the end of the four groups of support columns 2 away from the workbench 1. A water trough 8 is provided on the surface, and a drainage hole is provided on one side of the water trough 8. A rotating clamping device 6 is provided above the bottom plate 3. The fixed frame 501 is fixedly installed on the right side of the surface of the workbench 1. The threaded rod 503 is rotatably connected to the inner wall of the straight groove 502, and the upper end extends to the top of the fixed frame 501. The turntable 510 is fixedly installed on the top of the threaded rod 503. The connecting block 505 is threadedly connected to the circumferential surface of the threaded rod 503. The sliding block 506 is slidably connected to the circumferential surface of the threaded rod 503 and is located above the connecting block 505. The movable plate 508 is fixedly connected to the sliding block 506, and the movable plate 508 is slidably connected to the inner surface of the fixed frame 501. The hydraulic rod 509 is fixedly installed on the top of the fixed frame 501, and the top of the movable plate 508 is fixedly connected to the output end of the hydraulic rod 509. The drilling assembly 4 is fixedly installed at the bottom front end of the movable plate 508.

[0028] In order to ensure good lubrication of the gears in the mechanical transmission accessories, some oil holes are drilled on the gears. If the oil hole positions are not accurate, some parts may be poorly lubricated, increasing friction and wear. By manually controlling the rotation of the turntable 510, it is easy to control and can accurately adjust the distance between the touch sensor 511 and the limit plate 507. Scale lines 504 are provided on both sides of the limit plate 507, which is convenient for observing the scale to accurately measure the distance, thereby improving the accuracy of the drilling depth.

[0029] Specifically, when it is necessary to drill a hole in the accessory, the hydraulic rod 509 is extended to drive the movable plate 508 and the drilling assembly 4 to move downward until the drill bit in the drilling assembly 4 contacts the surface of the accessory, and the turntable 510 is rotated according to the set drilling depth value. The threaded rod 503 rotates to drive the connecting block 505 and the limit plate 507 to move. According to the scale display on the scale line 504, when the distance between the touch sensor 511 at the bottom of the movable plate 508 and the limit plate 507 is consistent with the drilling depth, the turntable 510 is stopped, and then the drill rod and hydraulic rod 509 in the drilling assembly 4 are started. While drilling, the hydraulic rod 509 pushes it downward until the touch sensor 511 contacts the limit plate 507 and sounds. At this time, drilling is stopped. This design can effectively control the depth of each hole to be consistent, avoiding product failure due to different depths.

[0030] Example 2:

[0031] Please see the attached Figure 1 - Attachment Figure 3 And attached Figure 5 - Attachment Figure 6 , and on the basis of Example 1, it is further obtained that the rotating clamping device 6 includes a rotating motor 601 fixedly mounted on the surface of the base plate 3, the output end of the rotating motor 601 is fixedly mounted with a rotating shaft 602, the end of the rotating shaft 602 away from the rotating motor 601 is fixedly mounted with a driving gear 603, the surface axis of the base plate 3 is rotatably connected with a rotating column 604, the circumferential surface of the rotating column 604 is fixedly mounted with a driven gear 605, a fixed plate 606 and a positioning plate 608 in sequence from bottom to top, and the positioning plate 608 is arranged on the surface of the workbench 1 At the center of the square axis, multiple connecting rods 607 distributed in a circular array are fixedly installed between the fixed plate 606 and the positioning plate 608. Multiple groups of positioning grooves 609 are opened on the surface of the positioning plate 608. The inside of the positioning groove 609 is fixedly connected to a straight rod 610. The surface of the straight rod 610 is sleeved with a telescopic spring 611. One end of the telescopic spring 611 is fixedly connected to the inner wall of the positioning groove 609, and the other end is fixedly connected to a slider 612. The slider 612 is slidably connected to the circumferential surface of the straight rod 610, and a clamping piece 613 is fixedly installed on the surface of the slider 612.

[0032] The number of revolutions of the rotating motor 601 can be controlled so that the positioning plate 608 rotates at the same angle each time. This allows the spacing of the holes punched on the accessories to be consistent each time, improving accuracy. The clamping piece 613 is arranged in an arc shape, so that multiple clamping pieces 613 can firmly clamp the accessories to prevent position displacement during processing and resulting in unqualified quality. A circular groove is provided on the surface of the workbench 1 to facilitate the rotation of multiple connecting rods 607 in the circular groove. The arrangement of multiple connecting rods 607 effectively supports the positioning plate 608 to prevent the positioning plate 608 from tilting to one side during drilling.

[0033] Specifically, first, by pulling multiple clamping pieces 613, the telescopic springs 611 are all forced to shrink, and the accessories to be processed are placed on the surface of the positioning plate 608. Then, the clamping piece 613 is released, and the telescopic spring 611 is reset to drive the clamping piece 613 to contact the accessory, completing the clamping and fixation, and the accessory is drilled through the drilling component 4. Then, by starting the rotating motor 601, the rotating shaft 602 and the driving gear 603 are driven to rotate, and the rotating column 604 is driven to rotate through the driven gear 605, so that the positioning plate 608 and the accessory are rotated, and drilling is performed on another position, avoiding manual operation and improving work efficiency.

[0034] Example 3:

[0035] Please see the attached Figure 1 - Attachment Figure 3 And attached Figure 7 , and on the basis of Example 2, it is further obtained that the cooling device 7 includes a mounting frame 701, the mounting frame 701 is connected to a water outlet pipe 703 through a water tank 702, the water outlet pipe 703 is connected to a drain pipe 706 through a water pump 705, and a nozzle 708 is fixedly installed on one end of the drain pipe 706 away from the water pump 705. The mounting frame 701 is fixedly installed on the left end of the surface of the workbench 1, the water tank 702 is fixedly installed on the left outer surface of the mounting frame 701, one end of the water outlet pipe 703 is fixedly connected to the water tank 702 and extends into the interior thereof, while the other end thereof is fixedly connected to the input end of the water pump 705, a mounting seat 704 is fixedly installed on the left outer surface of the mounting frame 701, the water pump 705 is fixedly installed inside the mounting seat 704, a fixing block 707 is fixedly installed on the top of the mounting frame 701, the drain pipe 706 is fixedly installed inside the fixing block 707, and one end of the drain pipe 706 is fixedly connected to the output end of the water pump 705.

[0036] A water inlet is provided at the upper end of one side of the water tank 702 for easy addition of water into the water tank 702. The nozzle 708 of the drain pipe 706 is directed towards the point where the drill bit and the accessories in the drilling assembly 4 come into contact, so as to cool the accessories while drilling and prevent deformation of the accessories due to local heat.

[0037] Specifically, during the drilling process, the water pump 705 is started to pump the water in the water tank 702 out through the outlet pipe 703, and then passes through the water pump 705 and the drain pipe 706 in sequence, and finally the water is evenly sprayed on the connection between the drill bit and the accessories through the nozzle 708. During the drilling process, a large amount of heat will be generated. The cooling device 7 is used to reduce the temperature of the drill bit and accessories to prevent local overheating and damage to the accessories. The sprayed water flows to the water tank 8 and is finally discharged through the drain hole.

[0038] Working principle of the present invention: The present invention is a drilling table device for processing mechanical transmission accessories. First, multiple clamping pieces 613 are pulled, and the telescopic springs 611 are all forced to shrink, and the accessories to be processed are placed on the surface of the positioning plate 608. Then the clamping piece 613 is released, and the telescopic spring 611 is reset to drive the clamping piece 613 to contact the accessory, completing the clamping and fixation. The hydraulic rod 509 extends to drive the movable plate 508 and the drilling assembly 4 to move downward until the drill bit in the drilling assembly 4 contacts the surface of the accessory. The turntable 510 is rotated according to the set drilling depth value, and the threaded rod 503 rotates to drive the connecting block 505 and the limit plate 507 to move. According to the scale display on the scale line 504, when the distance between the touch sensor 511 at the bottom of the movable plate 508 and the limit plate 507 is consistent with the drilling depth, the rotation stops. The turntable 510 then starts the drill rod and hydraulic rod 509 in the drilling assembly 4. While drilling, the hydraulic rod 509 pushes it downward until the touch sensor 511 contacts the limit plate 507 and sounds. At this time, drilling is stopped. At the same time, the water pump 705 is started to pump out the water in the water tank 702 through the outlet pipe 703, and then passes through the water pump 705 and the drain pipe 706 in turn, and finally the water is evenly sprayed on the connection between the drill bit and the accessories through the nozzle 708. Then, the hydraulic rod 509 drives the drilling assembly 4 to rise, starts the rotating motor 601, drives the rotating shaft 602 and the driving gear 603 to rotate, and then drives the rotating column 604 to rotate through the driven gear 605, so that the positioning plate 608 and the accessories rotate, repeats the above operation, and performs drilling processing on another position. At this point, the whole process ends.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drilling platform device for machining mechanical transmission parts, comprising a workbench (1) and a drilling assembly (4), characterized in that: The left and right side surfaces of the workbench (1) are respectively provided with a cooling device (7) and a depth positioning device (5), the depth positioning device (5) comprising a fixed frame (501), the inner side of the fixed frame (501) is provided with a straight groove (502), the interior of the straight groove (502) is connected with a connecting block (505), a sliding block (506) and a turntable (510) via a threaded rod (503), the fixed frame (501) is connected with a movable plate (508) via a hydraulic rod (509), the surface of the connecting block (505) is fixedly connected with a limiting plate (507), a touch sensor (511) is fixedly installed at the bottom of one side of the movable plate (508) close to the threaded rod (503), and a scale line (504) is provided on the inner surface of the fixed frame (501).

2. The drilling platform device for machining mechanical transmission parts according to claim 1, characterized in that: Support columns (2) are fixedly installed at the four corners of the bottom of the workbench (1); a bottom plate (3) is fixedly installed at one end of the four groups of support columns (2) away from the workbench (1); a water trough (8) is provided on the front and rear surfaces of the workbench (1); a drainage hole is provided on one side of the water trough (8); and a rotating clamping device (6) is provided above the bottom plate (3).

3. The drilling platform device for machining mechanical transmission parts according to claim 1, characterized in that: The fixed frame (501) is fixedly installed on the right side of the surface of the workbench (1); the threaded rod (503) is rotatably connected to the inner wall of the straight groove (502), and the upper end extends to the top of the fixed frame (501); the turntable (510) is fixedly installed on the top of the threaded rod (503); the connecting block (505) is threadedly connected to the circumferential surface of the threaded rod (503); the sliding block (506) is slidably connected to the circumferential surface of the threaded rod (503) and is located above the connecting block (505); the movable plate (508) is fixedly connected to the sliding block (506), and the movable plate (508) is slidably connected to the inner surface of the fixed frame (501).

4. The drilling platform device for machining mechanical transmission parts according to claim 1, characterized in that: The hydraulic rod (509) is fixedly mounted on the top of the fixed frame (501), the top of the movable plate (508) is fixedly connected to the output end of the hydraulic rod (509), and the drilling assembly (4) is fixedly mounted on the bottom front end of the movable plate (508).

5. The drilling platform device for machining mechanical transmission parts according to claim 1, characterized in that: The cooling device (7) comprises a mounting frame (701), wherein the mounting frame (701) is connected to a water outlet pipe (703) via a water tank (702), wherein the water outlet pipe (703) is connected to a drain pipe (706) via a water pump (705), and a nozzle (708) is fixedly mounted on one end of the drain pipe (706) away from the water pump (705).

6. The drilling platform device for machining mechanical transmission parts according to claim 5, characterized in that: The mounting frame (701) is fixedly mounted on the left end of the surface of the workbench (1); the water tank (702) is fixedly mounted on the left outer surface of the mounting frame (701); one end of the water outlet pipe (703) is fixedly connected to the water tank (702) and extends into the interior thereof, while the other end thereof is fixedly connected to the input end of the water pump (705); a mounting seat (704) is fixedly mounted on the left outer surface of the mounting frame (701); the water pump (705) is fixedly mounted inside the mounting seat (704); a fixing block (707) is fixedly mounted on the top of the mounting frame (701); the drain pipe (706) is fixedly mounted inside the fixing block (707); and one end of the drain pipe (706) is fixedly connected to the output end of the water pump (705).

7. The drilling platform device for machining mechanical transmission parts according to claim 2, characterized in that: The rotating clamping device (6) comprises a rotating motor (601) fixedly mounted on the surface of a base plate (3); a rotating shaft (602) is fixedly mounted on the output end of the rotating motor (601); a driving gear (603) is fixedly mounted on one end of the rotating shaft (602) away from the rotating motor (601); a rotating column (604) is rotatably connected to the surface axis of the base plate (3); and a driven gear (605), a fixed disk (606) and a positioning disk (608) are fixedly mounted on the circumferential surface of the rotating column (604) in order from bottom to top.

8. The drilling platform device for machining mechanical transmission parts according to claim 7, characterized in that: The positioning plate (608) is arranged at the axis center above the surface of the workbench (1), and a plurality of connecting rods (607) distributed in a circular array are fixedly installed between the fixed plate (606) and the positioning plate (608). The surface of the positioning plate (608) is provided with a plurality of positioning grooves (609), and a straight rod (610) is fixedly connected inside the positioning groove (609). A telescopic spring (611) is sleeved on the surface of the straight rod (610), one end of the telescopic spring (611) is fixedly connected to the inner wall of the positioning groove (609), and the other end thereof is fixedly connected to a slider (612), and the slider (612) is slidably connected to the circumferential surface of the straight rod (610), and a clamping piece (613) is fixedly installed on the surface of the slider (612).

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