Locking device applied to deep hole locking screw

Abstract

The invention belongs to the technical field of deep hole screw locking, and particularly relates to a locking device applied to deep hole screw locking, the locking device comprises two portal frames, a first electric track is slidably mounted between the tops of the two portal frames in the front-back direction, and second electric tracks are slidably mounted on the front side of the first electric track in the two side directions. When the locking device is used, a clamping device can clamp a screw inserted into a feeding pipe, then a clamping assembly can drive the screw to move downwards and is matched with the feeding pipe to enable the screw to be kept vertical, then a material taking air cylinder can move the vertical screw to the bottom of a positioning hole, and finally the screw is locked along with upward movement of an up-down air cylinder. The screw can penetrate through the positioning hole to be accurately installed at the bottom of the electric screwdriver, the clamping assembly automatically resets after the screw is firmly installed, and compared with an existing locking device, on the premise that it is guaranteed that the screw does not tilt or fall off, the production efficiency is improved, and the product reject ratio is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of deep hole locking screws, and in particular relates to a locking device applied to deep hole locking screws. Background Art

[0002] On the assembly line of the air conditioner electronic control box, after the PCB board is installed in the plastic shell, a screw machine is needed to fix the PCB board and the plastic shell together with screws, and then the PCB board is connected to the plastic shell and installed on the radiator at the same time (the PCB board has high-power and high-heat generating components that need to be cooled).

[0003] When the existing screw machine uses screws to lock and fix the PCB board and the plastic shell, since the traditional screw machine directly supplies the screws to the locking device (electric screwdriver), and the existing screw machine lacks a suitable positioning device, it is impossible to ensure that the screws are not crooked or fallen off when supplying the screws to the locking device. Therefore, it is difficult to meet production needs by using the traditional electric screwdriver to lock the screws while ensuring that the screws are locked and not crooked to affect the heat dissipation effect.

[0004] Therefore, it is necessary to invent a locking device for deep hole screw locking to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a locking device for deep hole locking screws to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A locking device for deep hole screw locking comprises two gantries, a first electric rail is slidably installed between the tops of the two gantries along the front-to-back direction, a second electric rail is slidably installed on the front side of the first electric rail along the two sides, a first mounting plate is slidably installed on the front side of the second electric rail along the vertical direction, an electric screwdriver is installed on the front side of the first mounting plate, and the screwdriver head of the electric screwdriver faces downward, an upper and lower cylinders are arranged on one side of the bottom of the electric screwdriver, the upper and lower cylinders are fixedly connected to the first mounting plate, the bottom ends of the upper and lower cylinders are horizontally fixedly connected to a connecting plate, and the connecting plate A material-taking cylinder is installed at the bottom, and an L-shaped second mounting plate is installed on the side of the material-taking cylinder close to the electric screwdriver, and a notch is penetrated through the middle part of the horizontal section of the second mounting plate, and a clamping assembly is installed on the top of the second mounting plate, and a vertical feeding pipe is arranged on the top of the material-taking cylinder, and the feeding pipe is installed on the front side of the first mounting plate, and a positioning plate is arranged on the top of the clamping assembly, and the positioning plate is fixedly connected to the front side of the first mounting plate, a positioning hole is penetrated through the positioning plate, and the positioning hole is located at the bottom of the electric screwdriver, and a screw to be installed is inserted through the positioning hole.

[0007] The locking plate is provided on one side of the second support bracket, and the locking plate is provided on the other side of the second support bracket, and the locking plate is fixedly mounted on the second support bracket.

[0008] Furthermore, the connecting assembly includes a connecting rod, which is vertically fixedly connected to the side of the slider away from the clamping block. The connecting rods in the two connecting assemblies are vertically slidably inserted into the free end of the push rod and the front side of the mounting block respectively. A second return spring is fixedly connected between the end of the connecting rod away from the slider and the inside of the push rod or the inside of the mounting block.

[0009] Furthermore, two positioning rods are horizontally arranged on one side of the U-shaped plate close to the material taking cylinder, one end of the positioning rod is fixedly connected to the U-shaped plate close to the mounting block, and the other end of the positioning rod vertically slides through and is inserted into the U-shaped plate close to the clamping cylinder.

[0010] Furthermore, a pull rope is connected to the bottom of the U-shaped plate, and a strip-shaped limit hole and a threading hole are respectively opened at the position opposite to the two pull ropes in the horizontal section of the second mounting plate. The limit hole is located at the bottom of the U-shaped plate close to the clamping cylinder, and the limit hole and the push rod are located in the same vertical plane. The width of the limit hole matches the inner diameter of the threading hole, and the two pull ropes are respectively inserted into the limit hole and the threading hole. The bottom end of the pull rope is connected to a conical counterweight block, and the weight of the counterweight block matches the weight of the U-shaped plate and the clamping block.

[0011] Furthermore, a coaxial annular protrusion is fixedly connected to the bottom edge of the positioning hole, and the inner edge of the bottom end of the annular protrusion is tapered.

[0012] Furthermore, a limiting sleeve is fixedly sleeved on the screw, the diameter of the limiting sleeve matches the inner diameter of the feed pipe and the positioning hole, and the top end of the limiting sleeve is a cone.

[0013] Furthermore, one side of the bayonet of the clamping block is made of hard rubber, and horizontal anti-slip patterns are evenly arranged on the inner walls on both sides of the bayonet.

[0014] Technical effects and advantages of the present invention: 1. When the locking device proposed by the present invention is in use, the clamping device can clamp the screw inserted into the feed pipe, and then the clamping assembly can drive the screw to move downward, and cooperate with the feed pipe to keep the screw vertical, and then the material taking cylinder can move the vertical screw to the bottom of the positioning hole, and finally with the upward movement of the upper and lower cylinders, the screw can pass through the positioning hole and be accurately installed to the bottom of the electric screwdriver, and the clamping assembly automatically resets after the screw is firmly installed. Compared with the existing locking device, the present invention improves production efficiency and reduces product defective rate under the premise of ensuring that the screw is not crooked or fallen off; 2. In the process of passing the screw through the positioning hole from bottom to top, when the limit sleeve is not coaxial with the screw, the top edge of the limit sleeve will contact the conical surface of the bottom edge of the annular protrusion. At this time, the conical surface of the bottom edge of the annular protrusion can apply a thrust toward the axis of the positioning hole to the limit sleeve, so that the limit sleeve can remain coaxial with the positioning hole under the action of the thrust. In the process of movement of the limit sleeve, the second return spring and the first return spring can be adaptively stretched or compressed as the clamping block moves in any horizontal direction, thereby meeting the movement requirements of the limit sleeve and the clamping block in any horizontal direction, thereby ensuring that the screw can be smoothly inserted into the positioning hole and installed on the bottom bit of the electric screwdriver. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial structural schematic diagram of the gantry, the first electric track, the second electric track and the locking device of the present invention; Figure 2 It is a three-dimensional schematic diagram of the structures of the first mounting plate, the electric screwdriver, the upper and lower cylinders and the material taking cylinder in the present invention; Figure 3 It is a three-dimensional schematic diagram of the material taking cylinder, the second mounting plate, the clamping assembly, the screws and the limiting sleeve in the present invention; Figure 4 It is a three-dimensional schematic diagram of part of the clamping assembly, the draw rope and the counterweight block in the present invention; Figure 5 It is a three-dimensional schematic diagram of the connecting assembly, the clamping assembly and the positioning rod in the present invention; Figure 6 It is a three-dimensional schematic diagram of the connection assembly and part of the clamping assembly in the present invention; Figure 7 It is a three-dimensional schematic diagram of the positioning plate and the annular protrusion in the present invention.

[0016] In the figure: 1. gantry; 2. first electric track; 3. second electric track; 4. first mounting plate; 5. electric screwdriver; 6. upper and lower cylinders; 7. connecting plate; 8. material-removing cylinder; 9. second mounting plate; 10. clamping assembly; 101. clamping cylinder; 102. push rod; 103. mounting block; 104. clamping block; 105. U-shaped plate; 106. bump; 107. slider; 108. limit rod; 109. first return spring; 11. feed pipe; 12. positioning plate; 13. positioning hole; 14. screw; 15. connecting assembly; 151. connecting rod; 152. second return spring; 16. positioning rod; 17. pull rope; 18. limit hole; 19. threading hole; 20. counterweight; 21. annular protrusion; 22. limit sleeve. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0018] The present invention provides Figures 1 to 7 A locking device for deep hole screw locking is shown, comprising two gantries 1, a first electric rail 2 is slidably installed between the tops of the two gantries 1 along the front-to-back direction, a second electric rail 3 is slidably installed on the front side of the first electric rail 2 along the two sides, a first mounting plate 4 is slidably installed on the front side of the second electric rail 3 along the vertical direction, an electric screwdriver 5 is installed on the front side of the first mounting plate 4, and the screwdriver head of the electric screwdriver 5 faces downward, an upper and lower cylinders 6 are provided on one side of the bottom of the electric screwdriver 5, the upper and lower cylinders 6 are fixedly connected to the first mounting plate 4, a connecting plate 7 is horizontally fixedly connected to the bottom of the upper and lower cylinders 6, a material taking cylinder 8 is installed on the bottom of the connecting plate 7, and an L-shaped second mounting cylinder 8 is installed on the side of the material taking cylinder 8 close to the electric screwdriver 5. Plate 9, and a notch is penetrated in the middle part of the horizontal section of the second mounting plate 9, a clamping assembly 10 is installed on the top of the second mounting plate 9, a vertical feeding pipe 11 is arranged on the top of the material taking cylinder 8, and the feeding pipe 11 is installed on the front side of the first mounting plate 4, a positioning plate 12 is arranged on the top of the clamping assembly 10, and the positioning plate 12 is fixedly connected to the front side of the first mounting plate 4, a positioning hole 13 is penetrated on the positioning plate 12, and the positioning hole 13 is located at the bottom of the electric screwdriver 5, a screw 14 to be installed is inserted through the positioning hole 13, and a limiting sleeve 22 is fixedly sleeved on the screw 14, and the diameter of the limiting sleeve 22 matches the inner diameter of the feeding pipe 11 and the positioning hole 13, and the top of the limiting sleeve 22 is conical; When the present invention is in use, the PCB board with the plastic shell flows to the specified position through the assembly line, and then the blocker on the assembly line can automatically stop the product fixture to be locked, and then the screw 14 machine can automatically insert a screw 14 into the feed tube 11, and make the limit sleeve 22 part of the screw 14 inserted into the feed tube 11, and then the clamping assembly 10 on the second mounting plate 9 can automatically clamp the screw 14 from the bottom end position of the feed tube 11, and then the upper and lower cylinders 6 can drive the material taking cylinder 8 together with the clamping assembly 10 and the screw 14 to move downward through the connecting plate 7, so that the screw 14 can be moved out from the bottom end of the feed tube 11, and in the process of the screw 14 moving downward out of the feed tube 11, because the diameter of the limit sleeve 22 matches the inner diameter of the feed tube 11, the screw 14 can be matched between the limit sleeve 22 and the feed tube 11. Under the restriction, it maintains a vertical state. When the top of the screw 14 is completely moved out of the bottom of the feeding tube 11, the material taking cylinder 8 can be extended, thereby driving the clamping assembly 10 and the screw 14 to move toward the bottom of the positioning plate 12. When the screw 14 moves to a position directly opposite to the positioning hole 13, the upper and lower cylinders 6 can be gradually shortened, thereby driving the material taking cylinder 8, the clamping assembly 10 and the screw 14 to move upward. During this process, the screw 14 can gradually pass through the positioning hole 13 from the bottom, so that the screw 14 can be accurately inserted into the bottom screwdriver head of the electric screwdriver 5 under the restriction and guiding effect of the positioning hole 13. When the screw 14 is clamped by the screwdriver head of the electric screwdriver 5, the clamping assembly 10 can be automatically loosened. Then, as the material taking cylinder 8 is gradually shortened, the clamping assembly 10 can return to its original position, thereby preparing for the next clamping of the screw 14. When the screw 14 is clamped by the screwdriver bit of the electric screwdriver 5, the electric screwdriver 5 can lock the screw 14 into the corresponding screw hole on the PCB board according to the set coordinate position under the cooperation of the first electric track 2 and the second electric track 3. When the electric screwdriver 5 completes the locking operation of the screw 14, the electric screwdriver 5 can return to the original position under the cooperation of the first electric track 2 and the second electric track 3, thereby entering the next round of locking work of the screw 14. Compared with the existing locking device, the present invention improves production efficiency and reduces product defective rate while ensuring that the screw 14 is not crooked or fallen off.

[0019] like Figures 3 to 6As shown, the clamping assembly 10 includes a clamping cylinder 101, which is fixedly mounted on the top of the second mounting plate 9. The rear end of the clamping cylinder 101 is drivingly connected to a push rod 102. A mounting block 103 is arranged on the rear side of the push rod 102. The mounting block 103 is fixedly connected to the horizontal section of the second mounting plate 9. Clamping blocks 104 are symmetrically arranged on the rear end of the push rod 102 and the front side of the mounting block 103. A V-shaped bayonet is provided on the side opposite to the two clamping blocks 104. A U-shaped plate 105 is provided on the side away from the two clamping blocks 104, and the clamping blocks 104 are detachably mounted on the opening of the U-shaped plate 105. On the inner side, the two U-shaped plates 105 are fixedly connected to the separated sides with a protrusion 106, and the protrusion 106 is horizontally installed with a mounting groove on the side away from the U-shaped plate 105, and a slider 107 is slidably installed in the mounting groove, and a limit rod 108 is inserted and inserted between the two sides of the slider 107. The two ends of the limit rod 108 are respectively fixedly connected to the inner walls on both sides of the mounting groove, and the positions of the limit rod 108 near the two ends are sleeved with a first return spring 109, and the two ends of the first return spring 109 are respectively fixedly connected to the slider 107 and the side wall of the mounting groove, and the slider 107 is provided with a connecting component 15 on the side away from the clamping block 104; The connecting assembly 15 includes a connecting rod 151, which is vertically fixedly connected to the side of the slider 107 away from the clamping block 104. The connecting rods 151 in the two connecting assemblies 15 are respectively vertically slidably inserted into the free end of the push rod 102 and the front side of the mounting block 103. A second return spring 152 is fixedly connected between the end of the connecting rod 151 away from the slider 107 and the inside of the push rod 102 or the inside of the mounting block 103. The bottom edge of the positioning hole 13 is fixedly connected with a coaxial annular protrusion 21, and the bottom inner edge of the annular protrusion 21 is tapered. When the screw 14 is clamped, as the screw 14 is inserted into the feed pipe 11, the limiting sleeve 22 of the screw 14 can be located in the bayonet of the clamping block 104 close to the mounting block 103 and remain in contact with the bayonet. Then, as the clamping cylinder 101 drives the clamping block 104 connected to the push rod 102 to move toward the other clamping block 104, when the clamping block 104 contacts the limiting sleeve 22 of the screw 14, the screw 14 can be clamped and fixed under the cooperation of the two clamping blocks 104, and then the upper and lower cylinders 6 can drive the material taking cylinder 8 together with the clamping assembly through the connecting plate 7. 10 and the screw 14 move downward, so that the screw 14 can be moved out from the bottom end of the feeding pipe 11, and when the screw 14 moves to the bottom position of the positioning hole 13 under the drive of the feeding cylinder 8, as the upper and lower cylinders 6 shorten, the top of the screw 14 can gradually approach the positioning hole 13, but due to the difference in the shape of the limiting sleeve 22, the limiting sleeve 22 may not be coaxial with the screw 14, and then when the limiting sleeve 22 of the screw 14 passes through the positioning hole 13 from bottom to top, the edge of the limiting sleeve 22 may be scratched with the edge of the positioning hole 13, thereby causing the screw 14 to be The obstruction of the bottom edge of the positioning hole 13 makes it impossible to smoothly pass through the positioning hole 13 and be installed on the electric screwdriver 5. At this time, due to the presence of the first return spring 109 and the second return spring 152, when the top edge of the limiting sleeve 22 contacts the conical surface of the bottom edge of the annular protrusion 21, the conical surface of the bottom edge of the annular protrusion 21 can apply a thrust to the axis of the positioning hole 13 to the limiting sleeve 22, so that the limiting sleeve 22 can remain coaxial with the positioning hole 13 under the action of the thrust, and during the movement of the limiting sleeve 22, the two clamping blocks 104 can move with the limiting sleeve 22. In this process, As the clamping block 104 moves in any horizontal direction, the two connecting rods 151 can adaptively move in the front-to-back direction, so that the corresponding second return spring 152 can be adaptively stretched or compressed. At the same time, the first return spring 109 on the limit rod 108 can also be adaptively stretched or compressed by the slider 107 as the clamping block 104 moves in the directions on both sides, thereby meeting the movement requirements of the limit sleeve 22 and the clamping block 104 in any horizontal direction, thereby ensuring that the screw 14 can be smoothly inserted into the positioning hole 13 and installed on the bottom screwdriver head of the electric screwdriver 5.

[0020] like Figure 4 and Figure 5 As shown, two positioning rods 16 are horizontally arranged on one side of the U-shaped plate 105 close to the material taking cylinder 8, one end of the positioning rod 16 is fixedly connected to the U-shaped plate 105 close to the mounting block 103, and the other end of the positioning rod 16 is vertically slidable and inserted into the U-shaped plate 105 close to the clamping cylinder 101; By providing a positioning rod 16, since the two clamping blocks 104 will compress the first return spring 109 in the corresponding protrusion 106 during the movement in the direction of both sides, and each first return spring 109 itself has differences, under the action of the same pressure or tension, different first return springs 109 will produce different deformations. Over time, the center line between the snap-fits of the two clamping blocks 104 may deviate, thereby affecting the accuracy of subsequent clamping of the screw 14. At this time, by providing a positioning rod 16, the two positioning rods 16 can limit the movement of the two clamping blocks 104 in the direction of both sides, thereby ensuring that the center line between the snap-fits of the two clamping blocks 104 is always in the same vertical plane, thereby ensuring the accuracy of the two clamping blocks 104 clamping the screw 14.

[0021] like Figure 3 to Figure 4 As shown, a drawstring 17 is connected to the bottom of the U-shaped plate 105, and a strip-shaped limit hole 18 and a threading hole 19 are respectively provided at the position of the horizontal section of the second mounting plate 9 directly opposite to the two drawstrings 17. The limit hole 18 is located at the bottom of the U-shaped plate 105 close to the clamping cylinder 101, and the limit hole 18 and the push rod 102 are located in the same vertical plane, the width of the limit hole 18 matches the inner diameter of the threading hole 19, and the two drawstrings 17 are respectively inserted into the limit hole 18 and the threading hole 19, and the bottom end of the drawstring 17 is connected to a conical counterweight block 20, and the weight of the counterweight block 20 matches the weight of the U-shaped plate 105 and the clamping block 104; By providing a pull rope 17, when the U-shaped plate 105 connected to the push rod 102 drives the clamping block 104 to move toward the other clamping block 104, the U-shaped plate 105 can drive the corresponding counterweight block 20 along the limiting hole 18 to approach the other clamping block 104 through the pull rope 17, and finally realize the clamping and fixing operation of the screw 14 through the mutual cooperation of the two clamping blocks 104. Then, as the two clamping blocks 104 drive the screw 14 to move upward, when the screw 14 is When the conical surface at the bottom end of the annular protrusion 21 contacts and drives the clamping block 104 and the U-shaped plate 105 to move, the counterweight block 20 can always generate a vertical downward pulling force on the U-shaped plate 105 through the pull rope 17. Then, when the clamping block 104 completes the clamping operation on the screw 14, as the clamping block 104 separates from the screw 14, the clamping block 104 is no longer restricted by the screw 14, and then the U-shaped block can be quickly reset under the pulling force of the first reset spring 109 and the counterweight block 20; At the same time, it can also prevent the first return spring 109 from being deformed due to frequent stretching or compression, and eventually causing the U-shaped plate 105 and the clamping block 104 to be unable to be completely returned to their original position.

[0022] like Figures 3 to 5As shown, one side of the bayonet of the clamping block 104 is made of hard rubber, and horizontal anti-slip grooves are evenly arranged on the inner walls on both sides of the bayonet; When the clamping block 104 made of rubber material is clamping the screw 14 , the clamping block 104 can protect the screw 14 , and at the same time, the anti-slip grooves on the inner side of the bayonet can improve the stability of the screw 14 when clamping.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A locking device for deep hole screw locking, comprising two gantries (1), characterized in that: A first electric rail (2) is slidably installed between the tops of the two gantries (1) along the front-to-back direction, a second electric rail (3) is slidably installed on the front side of the first electric rail (2) along the two side directions, a first mounting plate (4) is slidably installed on the front side of the second electric rail (3) along the vertical direction, an electric screwdriver (5) is installed on the front side of the first mounting plate (4), and the screwdriver head of the electric screwdriver (5) faces downward, and an upper and lower cylinder (6) is arranged on one side of the bottom of the electric screwdriver (5), the upper and lower cylinders (6) are fixedly connected to the first mounting plate (4), and a connecting plate (7) is fixedly connected to the bottom ends of the upper and lower cylinders (6) horizontally, and a material taking cylinder (8) is installed at the bottom of the connecting plate (7), and the material taking cylinder (8) is close to the material taking cylinder (8). An L-shaped second mounting plate (9) is installed on one side of the electric screwdriver (5), and a notch is opened through the middle part of the horizontal section of the second mounting plate (9), a clamping assembly (10) is installed on the top of the second mounting plate (9), a vertical feed pipe (11) is arranged on the top of the material-taking cylinder (8), and the feed pipe (11) is installed on the front side of the first mounting plate (4), a positioning plate (12) is arranged on the top of the clamping assembly (10), and the positioning plate (12) is fixedly connected to the front side of the first mounting plate (4), a positioning hole (13) is opened through the positioning plate (12), and the positioning hole (13) is located at the bottom of the electric screwdriver (5), and a screw (14) to be installed is inserted through the positioning hole (13).

2. The locking device for deep hole screw locking according to claim 1 is characterized in that: The clamping assembly (10) comprises a clamping cylinder (101), wherein the clamping cylinder (101) is fixedly mounted on the top of the second mounting plate (9), the rear end of the clamping cylinder (101) is drivingly connected to a push rod (102), a mounting block (103) is arranged on the rear side of the push rod (102), and the mounting block (103) is fixedly connected to the horizontal section of the second mounting plate (9), and clamping blocks (104) are symmetrically arranged at the rear end of the push rod (102) and the front side of the mounting block (103), and a V-shaped bayonet is provided on the side facing each other of the two clamping blocks (104), and a U-shaped plate (105) is provided on the side separated from each other of the two clamping blocks (104), and the clamping blocks (104) are detachably mounted on the U-shaped plate (105). On the inner side of the opening, a protrusion (106) is fixedly connected to the separated side of the two U-shaped plates (105), and a mounting groove is horizontally installed on the side of the protrusion (106) away from the U-shaped plate (105), and a slider (107) is slidably installed in the mounting groove. A limit rod (108) is inserted and slidably penetrated between the two sides of the slider (107), and the two ends of the limit rod (108) are respectively fixedly connected to the inner walls of the two sides of the mounting groove. The position of the limit rod (108) near the two ends is sleeved with a first return spring (109), and the two ends of the first return spring (109) are respectively fixedly connected to the slider (107) and the side wall of the mounting groove, and a connecting component (15) is provided on the side of the slider (107) away from the clamping block (104).

3. The locking device for deep hole screw locking according to claim 2 is characterized in that: The connecting assembly (15) comprises a connecting rod (151), wherein the connecting rod (151) is vertically fixedly connected to a side of the slider (107) away from the clamping block (104), and the connecting rods (151) in the two connecting assemblies (15) are respectively vertically slidably inserted into the free end of the push rod (102) and the front side of the mounting block (103), and a second return spring (152) is fixedly connected between the end of the connecting rod (151) away from the slider (107) and the inside of the push rod (102) or the inside of the mounting block (103).

4. The locking device for deep hole screw locking according to claim 3 is characterized in that: Two positioning rods (16) are horizontally arranged on one side of the U-shaped plate (105) close to the material taking cylinder (8), one end of the positioning rod (16) is fixedly connected to the U-shaped plate (105) close to the mounting block (103), and the other end of the positioning rod (16) vertically slides through and is inserted into the U-shaped plate (105) close to the clamping cylinder (101).

5. The locking device for deep hole screw locking according to claim 4 is characterized in that: A drawstring (17) is connected to the bottom of the U-shaped plate (105), and a strip-shaped limit hole (18) and a threading hole (19) are respectively provided at positions of the horizontal section of the second mounting plate (9) directly opposite to the two drawstrings (17). The limit hole (18) is located at the bottom of the U-shaped plate (105) near the clamping cylinder (101), and the limit hole (18) and the push rod (102) are located in the same vertical plane. The width of the limit hole (18) matches the inner diameter of the threading hole (19), and the two drawstrings (17) are respectively inserted into the limit hole (18) and the threading hole (19). The bottom end of the drawstring (17) is connected to a conical counterweight block (20), and the weight of the counterweight block (20) matches the weight of the U-shaped plate (105) and the clamping block (104).

6. The locking device for deep hole screw locking according to claim 1 is characterized in that: A coaxial annular protrusion (21) is fixedly connected to the bottom edge of the positioning hole (13), and the inner edge of the bottom end of the annular protrusion (21) is tapered.

7. The locking device for deep hole screw locking according to claim 6 is characterized in that: A limiting sleeve (22) is fixedly sleeved on the screw (14); the diameter of the limiting sleeve (22) matches the inner diameters of the feed pipe (11) and the positioning hole (13); and the top end of the limiting sleeve (22) is in the form of a cone.

8. The locking device for deep hole screw locking according to claim 5, characterized in that: One side of the clamping mouth of the clamping block (104) is made of hard rubber, and horizontal anti-slip grooves are evenly arranged on the inner walls on both sides of the clamping mouth.

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