Laser welding robot capable of automatically cooling welding spots

Abstract

The invention relates to the technical field of welding, in particular to a welding spot automatic cooling laser welding robot which comprises a shell assembly, the shell assembly comprises a cooling shell, a moving groove is formed in the side face of the cooling shell, a connecting assembly is installed in the moving groove, and the connecting assembly is in meshed connection with a gear assembly. A clamping assembly is installed on the side face of the gear assembly, a liquid discharging cavity and a liquid adding hole are formed in the cooling shell, and a liquid adding hole and a moving square groove are formed in the side face of the liquid discharging cavity. By arranging the gear assembly and the water blocking assembly, when welding is finished, the welding rod can drive the connecting assembly to move towards the inner side, and the internal pressure of the liquid discharging cavity is increased; and when the pressure reaches the maximum value, liquid in the liquid discharging cavity is jetted out from the connecting block through the water blocking assembly in a high-pressure environment by utilizing the clamping assembly to cool the surface of the welding spot, and the jetted liquid is in complete contact with the welding spot in a wrapping shape by utilizing high pressure, so that a better cooling layer is formed.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and more particularly to a laser welding robot capable of automatically cooling a welding point. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is a non-contact welding method that does not require pressurization during the operation. The welding process is a heat conduction type. The laser radiation heats the workpiece surface, and the surface heat diffuses to the inside through heat conduction. By controlling parameters such as the laser pulse width, energy, peak power, and repetition frequency, the workpiece is melted to form a specific molten pool.

[0003] The Chinese invention patent with publication number CN118559196A discloses a laser welding robot with automatic cooling of welding spots, including a cooling cylinder and a welder, and a robot body for installing the cooling cylinder and the welder, wherein the input end of the cooling cylinder is connected to the cooling medium supply end through a connecting pipe, and the output end of the cooling cylinder is a rotatable outer cylinder, which is nested in the outer wall of the output end of the cooling cylinder, wherein the outer cylinder is connected to a rotating mechanism, which is used to change the distribution mode of the output end of the cooling cylinder and adjust the medium spraying mode, wherein a switching mechanism is provided at the bottom end of the outer cylinder, wherein the switching mechanism changes the distribution state by driving the rotating mechanism, and the laser welding robot with automatic cooling of welding spots integrates a water cooling unit in the laser welding robot to ensure that the weld can be fully cooled, and at the same time, the water cooling spray unit is improved, which can spray welds at different stages in different states, thereby effectively avoiding the deterioration of weld quality due to excessive temperature difference in the weld, and improving the water cooling efficiency and weld quality.

[0004] It can be seen that the existing welding robots still use a unified controlled water cooling method to cool the solder joints. This treatment method is easy to calculate and adjust the length for long distances, but it is cumbersome for the cooling of point solder joints. The control is too complicated, and the water flow pressure is low. Only ordinary pressurization means are not suitable for the cooling environment of the solder joints, and a good cooling effect cannot be achieved. In addition, the existing water cooling needs to be replenished after each cooling use, and the existing water replenishment means still use circuit control, which undoubtedly increases the control cost and complexity, and cannot achieve automated and efficient cooling and automated water replenishment for point solder joints. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a laser welding robot with automatic temperature reduction of welding points to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solutions: a laser welding robot with automatic temperature reduction of welding points, comprising a shell component, the shell component comprising a cooling shell, a moving groove is provided on the side of the cooling shell, a connecting component is installed inside the moving groove, the connecting component is meshed and connected with the gear component, a clamping component is installed on the side of the gear component, a liquid discharge chamber and a liquid filling hole are provided inside the cooling shell, a liquid filling hole and a moving square groove are provided on the side of the liquid discharge chamber, a pressurizing component is installed inside the moving square groove, a one-way valve groove is provided on the front of the liquid filling hole, a one-way valve is installed inside the one-way valve groove, the liquid filling hole is connected with a water tank, a water inlet is provided on the top of the water tank, a water storage tank and a spray port are provided on the other side of the liquid discharge chamber, a water blocking component is installed inside the water storage tank, a connecting claw is fixedly connected to the back of the shell component, and the shell component is installed on the side of the welding rod through the connecting claw;

[0007] Furthermore, the gear assembly includes a main gear, and a one-way cam rod and a buffer collecting rod are installed on both sides of the main gear. The outer side of the one-way cam rod is fixedly connected with a one-way tooth, and the one-way tooth forms a one-way gear structure with the main gear and the one-way cam rod. A one-way slot is opened on the outer side of the main gear and the buffer collecting rod, and the clamping assembly is installed inside the one-way slot. A spiral spring is installed at the other end of the buffer collecting rod and the inside of the main gear.

[0008] Furthermore, the rotating guide rod is movably installed inside the spiral spring, and the extension and retraction of the rotating guide rod are controlled by the control unit. When the moving square tooth plate approaches the bottom, the control unit extends the rotating guide rod.

[0009] Furthermore, the boosting assembly includes a connecting straight plate, the upper and lower ends of the right side of the connecting straight plate are fixedly connected with spherical rods, the outer side of the spherical rod is sleeved with a second spring, the other side of the connecting straight plate is fixedly connected with a boosting plate, the outer side of the boosting plate is sleeved with a return spring, and the boosting plate is installed inside the liquid filling hole.

[0010] Furthermore, the water-blocking assembly comprises a water-blocking circular plate, a moving block is installed inside the water-blocking circular plate, and a rope rod is fixedly connected to the top of the moving block.

[0011] Furthermore, a restoring spring is installed on the top of the rope rod. When the rotation effect of the buffering rod is lost, the restoring spring moves the rope rod downward, causing the water-blocking circular plate and the moving block to be misaligned, so that a closed space is formed inside the liquid discharge cavity.

[0012] Furthermore, a receiving groove is provided at one end of the buffer receiving rod, and the other end of the rope rod is fixed inside the receiving groove.

[0013] Furthermore, the connecting assembly includes a connecting main rod, a movable plate is fixedly connected to the outer side of the connecting main rod, and movable square tooth plates are fixedly connected to both ends of the movable plate. A sliding groove is provided on the front side of the movable square tooth plate, and a tooth groove is provided on the bottom of the movable square tooth plate. The tooth groove is meshed and connected with the main gear. A pressing plate is fixedly connected to the side of the connecting main rod, and the pressing plate is installed inside the liquid discharge chamber.

[0014] Furthermore, the clamping assembly comprises a clamping block, a side of the clamping block is fixedly connected with a clamping moving rod, an outer side of the clamping moving rod is sleeved with a third spring, and a trapezoidal arc groove is formed on the top of the clamping block.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is provided with a gear assembly and a water-blocking assembly, which is conducive to the welding rod driving the connecting assembly to move inward at the end of welding, thereby increasing the internal pressure of the liquid discharge chamber, and when the pressure reaches the maximum value, the clamping assembly is used to spray the liquid inside the liquid discharge chamber from the connecting block through the water-blocking assembly under a high-pressure environment to cool the surface of the welding point. The high pressure is used to make the sprayed liquid wrap and fully contact the welding point, forming a better cooling layer.

[0017] 2. The present invention is provided with a booster assembly, which is beneficial for the next welding. The moving square tooth plate drives the main gear to rotate in the opposite direction. During the rotation, the cam on the one-way cam rod pushes the booster assembly to reciprocate, so that the cooling liquid inside the water tank enters the liquid discharge chamber to wait for subsequent use, and the reciprocating motion of welding is used to realize automatic water replenishment for cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the housing assembly of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the connection assembly of the present invention.

[0022] Figure 5 It is a schematic diagram of the gear assembly structure of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the water blocking component of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the clamping assembly of the present invention.

[0025] The accompanying drawings are marked as follows: 1. Shell assembly; 101. Cooling shell; 102. Moving groove; 103. Pressurization chamber; 104. Liquid discharge chamber; 105. Liquid filling hole; 106. One-way valve groove; 107. Moving square groove; 108. Water tank; 109. Water storage tank; 110. Injection port; 111. Connecting block; 112. Sliding block; 2. Connecting assembly; 201. Connecting main rod; 202. Moving square tooth plate; 203. Sliding groove; 204. Pressing plate; 3. Gear assembly; 301. Main gear; 302. One-way cam rod; 303. Slow down Punch and collect rod; 304, rotating guide rod; 305, scroll spring; 306, one-way slot; 307, one-way tooth; 4, booster assembly; 401, spherical rod; 402, second spring; 403, connecting straight plate; 404, reset spring; 405, booster plate; 5, water-blocking assembly; 501, water-blocking circular plate; 502, moving block; 503, rope rod; 6, snap-on assembly; 601, snap-on block; 602, snap-on moving rod; 603, third spring; 604, trapezoidal arc groove; 7, connecting claw; 8, welding rod; 9, water inlet. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The laser welding robot with automatic cooling of welding points involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0027] Reference Figure 1-3 The present invention provides a laser welding robot with automatic temperature reduction of welding points, including a shell component 1, wherein the shell component 1 includes a cooling shell 101, a moving groove 102 is provided on the side of the cooling shell 101, a connecting component 2 is installed inside the moving groove 102, the connecting component 2 is meshed and connected with a gear component 3, a clamping component 6 is installed on the side of the gear component 3, a liquid discharge cavity 104 and a liquid filling hole 105 are provided inside the cooling shell 101, a liquid filling hole 105 and a moving square groove 107 are provided on the side of the liquid discharge cavity 104, and the inside of the moving square groove 107 A booster assembly 4 is installed, a one-way valve groove 106 is provided on the front of the liquid adding hole 105, a one-way valve is installed inside the one-way valve groove 106, the liquid adding hole 105 is connected to the water tank 108, a water inlet 9 is provided on the top of the water tank 108, a water storage tank 109 and a jet port 110 are provided on the other side of the liquid discharge chamber 104, a sliding block 112 is installed in the middle of the connecting block 111, a water blocking assembly 5 is installed inside the water storage tank 109, a connecting claw 7 is fixedly connected to the back of the shell assembly 1, and the shell assembly 1 is installed on the side of the welding rod 8 through the connecting claw 7;

[0028] The main difference between this embodiment and the prior art is that in this embodiment, the reciprocating motion during welding is used to realize the automatic filling and release of the cooling liquid, and the wrapped automatic cooling of the welding point is realized, specifically, the gear assembly 3, the boost assembly 4, and the water blocking assembly 5;

[0029] The above structure is the main structure of this embodiment, which is conducive to the automatic and efficient cooling of small welding points, and solves the current problem that a single welding point is difficult to control and effectively standardize the cooling. The welding rod 8 is an existing structure, and the specific structure and connection method of the welding rod 8 are not described in detail in this embodiment.

[0030] Reference Figure 2 The booster assembly 4 includes a connecting straight plate 403, and the upper and lower ends of the right side of the connecting straight plate 403 are fixedly connected with a spherical rod 401, and the outer side of the spherical rod 401 is sleeved with a second spring 402. The other side of the connecting straight plate 403 is fixedly connected with a booster plate 405, and the outer side of the booster plate 405 is sleeved with a return spring 404. The booster plate 405 is installed inside the liquid adding hole 105. When the reverse movement after the cooling is completed, that is, when welding again, the moving square tooth plate 202 drives the main gear 301 to move in the reverse direction. The main gear 301 and the one-way cam rod 302 rotate synchronously under the action of the one-way tooth 307. During the rotation, the cam on the one-way cam rod 302 pushes the booster assembly 4 to reciprocate.

[0031] In this embodiment, it should be specifically explained that: during the continuous reciprocating motion of the booster component 4, the cooling liquid inside the water tank 108 enters the liquid discharge chamber 104 to wait for subsequent use, thereby realizing the automation of material loading and the automation of cooling by utilizing the reciprocating motion of welding.

[0032] Reference Figure 4 The connecting component 2 includes a connecting main rod 201, a movable plate is fixedly connected to the outer side of the connecting main rod 201, and movable square tooth plates 202 are fixedly connected to both ends of the movable plate. A sliding groove 203 is provided on the front of the movable square tooth plate 202, and a tooth groove is provided on the bottom of the movable square tooth plate 202. The tooth groove is meshed with the main gear 301. A pressing plate 204 is fixedly connected to the side of the connecting main rod 201, and the pressing plate 204 is installed inside the liquid discharge chamber 104. When welding is completed, the welding rod 8 drives the connecting component 2 to move inward. At this time, the pressing plate 204 pressurizes the internal liquid of the boost chamber 103, and the internal pressure of the liquid discharge chamber 104 continues to increase, so that the internal liquid of the liquid discharge chamber 104 has a tendency to be discharged to the injection port 110.

[0033] In this embodiment, it needs to be specifically explained that: the connection control method of the connection component 2 in this application belongs to the prior art, and this application does not make any specific limitation on the connection control method of the connection component 2.

[0034] Reference Figure 5 The gear assembly 3 includes a main gear 301, and a one-way cam rod 302 and a buffer receiving rod 303 are sleeved and installed on both sides of the main gear 301. The outer side of the one-way cam rod 302 is fixedly connected with a one-way tooth 307, and the one-way tooth 307 forms a one-way gear structure with the main gear 301 and the one-way cam rod 302. A storage groove is provided at one end of the main gear 301 and the buffer receiving rod 303, and a one-way clamping groove 306 is provided on the outer side of the buffer receiving rod 303. The clamping assembly 6 is installed in the one-way clamping groove 306. The other end of the buffer receiving rod 303 and the inside of the main gear 301 are installed with a spiral spring 305. When welding is completed, the welding rod 8 is brought The movable connecting component 2 moves forward inward, and the force generated by the rotation of the main gear 301 increases the elastic potential energy of the scroll spring 305. When the rotating guide rod 304 rotates to the inside of the trapezoidal arc groove 604, the liquid inside the liquid discharge chamber 104 is ejected from the connecting block 111 through the water blocking component 5 under a high-pressure environment to cool the surface of the welding point. When the cooling is completed and the reverse movement is performed, that is, welding again, the moving square tooth plate 202 drives the main gear 301 to move in the opposite direction. The main gear 301 and the one-way cam rod 302 rotate synchronously under the action of the one-way teeth 307. During the rotation, the cam on the one-way cam rod 302 pushes the boosting component 4 to reciprocate.

[0035] In this embodiment, it is necessary to specifically explain that: the rotating guide rod 304 is movably installed inside the spiral spring 305, and the extension and retraction of the rotating guide rod 304 are controlled by the control unit. When the moving square tooth plate 202 is close to the bottom, the control unit extends the rotating guide rod 304. At this time, when the rotating guide rod 304 rotates again, when it rotates to the inside of the trapezoidal arc groove 604, the clamping block 601 loses the fixation on the buffer collecting rod 303 under the action of the inclined surface. At this time, the buffer collecting rod 303 starts to rotate, and the receiving groove opened on the outer surface of the buffer collecting rod 303 pulls the rope rod 503.

[0036] Reference Figure 6 The water-blocking assembly 5 includes a water-blocking circular plate 501, a moving block 502 is installed inside the water-blocking circular plate 501, a rope rod 503 is fixedly connected to the top of the moving block 502, and the receiving groove provided on the outer surface of the buffer receiving rod 303 pulls the rope rod 503. At this time, the moving block 502 moves upward inside the water-blocking circular plate 501, and the water-blocking circular plate 501 and the moving block 502 form a through hole. The liquid inside the liquid discharge cavity 104 is ejected from the connecting block 111 through the water-blocking assembly 5 under a high-pressure environment to cool the surface of the welding point.

[0037] In this embodiment, it should be specifically explained that a restoring spring is installed on the top of the rope rod 503. When the rotation effect of the buffering collecting rod 303 is lost, the restoring spring moves the rope rod 503 downward, causing the water-blocking circular plate 501 and the moving block 502 to be misaligned, so that a closed space is formed inside the liquid discharge chamber 104.

[0038] Reference Figure 7 The clamping assembly 6 includes a clamping block 601, a clamping moving rod 602 is fixedly connected to the side of the clamping block 601, a third spring 603 is sleeved on the outer side of the clamping moving rod 602, and a trapezoidal arc groove 604 is opened on the top of the clamping block 601. When the rotating guide rod 304 rotates to the inside of the trapezoidal arc groove 604, the clamping block 601 moves sideways under the action of the inclined surface, and the clamping block 601 is disengaged from the inside of the one-way clamping groove 306, so that the clamping block 601 loses the fixation on the buffer receiving rod 303.

[0039] In this embodiment, it should be specifically explained that: when welding again, the clamping block 601 is extended into the one-way clamping slot 306 again under the action of the third spring 603 to achieve automatic fixation, which is beneficial to control the boosting time and increase the pressure during injection.

[0040] Working principle of the present invention:

[0041] The main problem solved by this embodiment is: utilizing the reciprocating motion during welding to realize the automatic filling and release of the cooling liquid, realizing the wrap-around automatic cooling of the solder joint, which is beneficial to the automatic and efficient cooling of small solder joints, and solves the current problem that a single solder joint is difficult to control and effectively standardize the cooling.

[0042] The specific steps are as follows:

[0043] When welding is finished, the welding rod 8 drives the connecting assembly 2 to move inward, and the pressing plate 204 applies pressure to the liquid inside the pressurizing chamber 103. At this time, the liquid inside the drain chamber 104 has a tendency to be discharged toward the injection port 110. However, under the action of the water-blocking assembly 5 in the water storage tank 109, the internal pressure of the drain chamber 104 continues to increase, and the liquid cannot be discharged.

[0044] At the same time, since the bottom of the moving square tooth plate 202 is meshed with the main gear 301, the moving square tooth plate 202 drives the main gear 301 to rotate during the movement of the moving square tooth plate 202. The force generated by the rotation increases the elastic potential energy of the spiral spring 305. Although the rotation can drive the buffer receiving rod 303 to rotate, the buffer receiving rod 303 cannot rotate at this time because the clamping block 601 is clamped in the one-way clamping groove 306. However, when the rotating guide rod 304 rotates to the inside of the trapezoidal arc groove 604, the clamping block 601 is clamped in the one-way clamping groove 306 under the action of the inclined surface. 1 loses the fixation of the buffer collecting rod 303, and the buffer collecting rod 303 starts to rotate. The receiving groove on the outer surface of the buffer collecting rod 303 pulls the rope rod 503. At this time, the moving block 502 moves upward inside the water-blocking circular plate 501. The water-blocking circular plate 501 and the moving block 502 form a through hole. The liquid inside the liquid discharge cavity 104 is ejected from the connecting block 111 through the water-blocking component 5 under high pressure to cool the surface of the welding point. Due to the high pressure, the ejected liquid is wrapped and completely contacts the welding point, forming a better cooling layer;

[0045] During the reverse movement after the cooling is completed, i.e., when welding again, the movable square tooth plate 202 drives the main gear 301 to move in the reverse direction. The main gear 301 and the one-way cam rod 302 rotate synchronously under the action of the one-way tooth 307. During the rotation, the cam on the one-way cam rod 302 pushes the boosting assembly 4 to reciprocate. Since the boosting plate 405 is installed inside the liquid filling hole 105, the cooling liquid inside the water tank 108 enters the liquid discharge chamber 104 during the continuous reciprocating motion and waits for subsequent use, thereby realizing the automation of loading and the automation of cooling by utilizing the reciprocating motion of welding.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding robot with automatic temperature reduction of welding points, comprising a housing component (1), characterized in that: The housing component (1) comprises a cooling housing (101), a movable groove (102) is provided on the side of the cooling housing (101), a connecting component (2) is installed inside the movable groove (102), the connecting component (2) is meshedly connected with the gear component (3), a clamping component (6) is installed on the side of the gear component (3), a liquid discharge cavity (104) and a liquid filling hole (105) are provided inside the cooling housing (101), a liquid filling hole (105) and a movable square groove (107) are provided on the side of the liquid discharge cavity (104), a pressurizing component (4) is installed inside the movable square groove (107), and the liquid filling hole (105) A one-way valve groove (106) is provided on the front side, a one-way valve is installed inside the one-way valve groove (106), a liquid filling hole (105) is connected to a water tank (108), a water inlet (9) is provided on the top of the water tank (108), a water storage tank (109) and a spray port (110) are provided on the other side of the liquid discharge cavity (104), a sliding block (112) is installed in the middle of the connecting block (111), a water blocking component (5) is installed inside the water storage tank (109), a connecting claw (7) is fixedly connected to the back side of the shell component (1), and the shell component (1) is installed on the side of the welding rod (8) through the connecting claw (7); The gear assembly (3) comprises a main gear (301), a one-way cam rod (302) and a buffer receiving rod (303) are sleeved and installed on both sides of the main gear (301), a rotating guide rod (304) is installed on the side of the main gear (301), a one-way tooth (307) is fixedly connected to the outer side of the one-way cam rod (302), and the one-way tooth (307) forms a one-way gear structure with the main gear (301) and the one-way cam rod (302), a one-way slot (306) is opened on the outer side of the main gear (301) and the buffer receiving rod (303), and the clamping assembly (6) is installed inside the one-way slot (306), and a spiral spring (305) is installed between the other end of the buffer receiving rod (303) and the inside of the main gear (301).

2. A laser welding robot with automatic temperature reduction of welding points according to claim 1, characterized in that: The rotating guide rod (304) is movably mounted inside the spiral spring (305). The extension and retraction of the rotating guide rod (304) are controlled by a control unit. When the moving square tooth plate (202) approaches the bottom, the control unit extends the rotating guide rod (304).

3. A laser welding robot with automatic temperature reduction of welding points according to claim 1, characterized in that: The booster assembly (4) comprises a connecting straight plate (403), the upper and lower ends of the right side of the connecting straight plate (403) are fixedly connected to a spherical rod (401), the outer side of the spherical rod (401) is sleeved with a second spring (402), the other side of the connecting straight plate (403) is fixedly connected to a booster plate (405), the outer side of the booster plate (405) is sleeved with a return spring (404), and the booster plate (405) is installed inside the liquid adding hole (105).

4. The laser welding robot with automatic temperature reduction of welding points according to claim 1, characterized in that: The water-blocking assembly (5) comprises a water-blocking circular plate (501), a moving block (502) is installed inside the water-blocking circular plate (501), and a rope rod (503) is fixedly connected to the top of the moving block (502).

5. A laser welding robot with automatic temperature reduction of welding points according to claim 4, characterized in that: A restoring spring is installed on the top of the rope rod (503). When the rotation effect of the buffer collecting rod (303) is lost, the restoring spring moves the rope rod (503) downward, causing the water-blocking circular plate (501) and the moving block (502) to be misaligned, so that a closed space is formed inside the liquid discharge chamber (104).

6. The laser welding robot with automatic temperature reduction of welding points according to claim 1, characterized in that: One end of the buffer receiving rod (303) is provided with a receiving groove, and the other end of the rope rod (503) is fixed inside the receiving groove.

7. The laser welding robot with automatic temperature reduction of welding points according to claim 1, characterized in that: The connecting assembly (2) comprises a connecting main rod (201), a movable plate is fixedly connected to the outer side of the connecting main rod (201), and movable square tooth plates (202) are fixedly connected to both ends of the movable plate. A sliding groove (203) is provided on the front of the movable square tooth plate (202), and a tooth groove is provided on the bottom of the movable square tooth plate (202), and the tooth groove is meshed with the main gear (301). A pressing plate (204) is fixedly connected to the side of the connecting main rod (201), and the pressing plate (204) is installed inside the liquid discharge chamber (104).

8. The laser welding robot with automatic temperature reduction of welding points according to claim 1, characterized in that: The clamping assembly (6) comprises a clamping block (601), a clamping moving rod (602) is fixedly connected to the side of the clamping block (601), a third spring (603) is sleeved on the outer side of the clamping moving rod (602), and a trapezoidal arc groove (604) is provided on the top of the clamping block (601).

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