WO2022099772A1

WO2022099772A1 - Fixing device for welding metal parts

Info

Publication number: WO2022099772A1
Application number: PCT/CN2020/130692
Authority: WO
Inventors: 葛延标
Original assignee: 苏州德拉乐电梯有限公司
Priority date: 2020-11-12
Filing date: 2020-11-21
Publication date: 2022-05-19
Also published as: CN112247456A; CN112247456B

Abstract

Disclosed is a fixing device for welding metal parts. The fixing device comprises a base (1). Side plates (2) are fixed on upper surfaces of a left side and a right side of the base (1). A top plate (3) is fixed on the top of the side plates (2). A welding device (4) passes through the top plate (3) and is rotatably disposed therein. A positioning device (5) is provided below the welding device (4). A linkage device (6) passes through an upper right end of the positioning device (5), and the welding device (4) is fixed to a left side of the top of the linkage device (6). A controller (7) is fixed at a left end of the positioning device (5). The device fixes and welds metal parts and can perform fixing and welding simultaneously, is easy to operate, and has high practicability.

Description

A fixing device for welding metal products

technical field

The present invention is in the field of metal welding, in particular to a fixing device for welding metal products.

Background technique

During metal welding, it is often necessary to fix and clamp metal products to ensure the precision and accuracy of metal products welding.

technical problem

The existing fixing device for welding metal products is often performed separately for fixing, clamping and welding, which has low efficiency and large workload. Therefore, a fixing device for welding metal products is required to solve the above problems.

technical solutions

The purpose of the present invention is to provide a fixing device for welding metal products, so as to solve the problems raised in the above-mentioned background art.

To achieve the above object, the present invention provides the following technical solutions:

A fixing device for welding metal products, comprising a base, a side plate is fixed on the upper surfaces of the left and right sides of the base, a top plate is fixed on the top of the side plate, a welding device is arranged through and rotates through the top plate, and a lower part of the welding device is provided. A positioning device is arranged on the side, a linkage device penetrates through the upper right end of the positioning device, the top left side of the linkage device is fixed with the welding device, and a controller is fixed at the left end of the positioning device.

Preferably, the welding device includes an upper block, a turning block is fixed at the lower end of the upper block, the turning block penetrates the middle of the top plate and is rotatably connected with the top plate, and a lower stop is fixed at the lower end of the turning block, and the lower A shaft rod is fixed at the lower end of the block, a gear is fixed on the periphery of the shaft rod, the gear is matched with the upper left end of the linkage device, a threaded rod is fixed at the lower end of the shaft rod, and a limit plate is fixed at the lower end of the threaded rod. The threaded rod is threaded through a threaded block, the threaded block penetrates a horizontal plate, a hanger rod is fixed at the lower end of the horizontal plate, a welding machine is fixed at the lower end of the hanger rod, the welding machine is connected with a welding rod, and the horizontal plate is left and right. Guide rods run through both sides, the upper end of the guide rod is fixed with the lower end of the top plate, and the lower end of the guide rod is fixed with a limiting block.

Preferably, the positioning device includes a stabilizing block, the stabilizing block penetrates the left and right end side plates and is rotatably connected with the side plates, and the threaded columns are fixed at the mutually close ends of the left and right sides of the stabilizing blocks, and the threaded columns are provided with left and right side plates. Two baffles are fixed at the ends that are close to each other, and movable blocks are threaded through the two left and right threaded posts. L-shaped rods are fixed on the upper surfaces of the two movable blocks, and two L-shaped rods are fixed at the close ends of the two L-shaped rods. In the clamp, a sliding rod runs through the lower side of the movable block, the left and right ends of the sliding rod and the side plates on the left and right sides are fixed to each other close to each other, and the two movable blocks are far away from each other and the two side plates A buffer spring screwed around the periphery of the sliding rod is fixed at the ends close to each other, and a synchronizer is hinged on the lower side of the two movable blocks.

Preferably, the clamp includes a support rod, and the end of the support rod and the L-shaped rod are fixed, a support frame is fixed at the right end of the support rod, and a motor is fixed on the inner walls of the left and right ends of the support frame, and the motor output A turntable is fixed on the shaft, a connecting rod is fixed at one end of the turntable away from the motor, and a threaded disk is fixed at one end of the connecting rod away from the turntable, and a stud is threaded through the threaded disk, and the left and right ends of the stud are fixed with limited positions. The right end of the limit plate on the right side is fixed with a clamping block, and the clamping blocks are provided with two and symmetrically distributed.

Preferably, the synchronizer comprises a strut, the lower end of the strut is fixed to the upper surface of the middle part of the base, the upper end of the strut is fixed to the lower surface of the middle part of the sliding rod, the outer periphery of the strut is slidably sleeved with a synchronizing block, and the synchronizing block is hinged There are hinge rods, the hinge rods are provided with two left and right rods, and the upper ends of the two left and right hinge rods are hinged with two movable blocks.

Preferably, the linkage device includes a linkage block, the linkage block and the threaded column on the right side penetrate and are threadedly connected, a first linkage rod is fixed on the upper surface of the linkage block, and a first linkage rod is fixed on the left end of the first linkage rod Two linkage rods, an annular frame is fixed at the right end of the second linkage rod, a rack is fixed on the inner wall of the upper end of the annular frame, the rack and the gear are hinged, the gear is fixed with a pulley, and the pulley is slidably matched with a sliding The chute is fixed with the upper surface of the bottom end of the annular frame.

Preferably, the controller includes a handle, a turntable is fixed at the right end of the handle, the rotation shaft of the turntable is fixed with the stabilization block on the left side, a plurality of through holes are formed on the periphery of the turntable, and the lower end of the through hole is matched with a fixing block. device.

Preferably, the holder includes a sleeve, an ejection spring is fixed at the lower end of the sleeve, a slider is fixed at the upper end of the ejection spring, and a slot is formed at the left end of the slider, and the slot is matched with a The inclined block, the left end of the inclined block is fixed with a push rod, the left end of the push rod is fixed with a push handle, the two push rods close to each other are provided with a fixed spring, the left and right ends of the fixed spring are respectively connected to the inner wall of the left end of the sleeve and the left end of the inclined block are fixed; the upper end of the slider is fixed with a fixed rod, the fixed rod penetrates the top of the sleeve and the upper side is matched with the through hole, and the middle of the left end of the fixed rod is fixed with a pressure rod; Guide rods are fixed on the upper surfaces of the two ends, a guide sleeve is matched with the upper end of the guide rod, and the upper end of the guide sleeve is fixed with the inner wall of the upper end of the sleeve.

beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

1. Through the design of the welding device, the two metal products after clamping and fixing can be lowered and welded.

2. Through the design of the linkage device, the welding and clamping can be carried out synchronously to ensure the efficiency of welding and the accuracy of control.

3. Through the design of the positioning device, the metal products can be clamped and fixed, which is conducive to high-quality welding.

Description of drawings

FIG. 1 is a schematic structural diagram of a fixing device for welding metal products.

Figure 2 is a schematic diagram of a fixture clamp for welding metal products.

Fig. 3 is a schematic diagram of a linkage device of a fixing device for welding metal products.

FIG. 4 is a schematic diagram of a fixture of a fixture for welding metal products.

In the figure: 1-base, 2-side plate, 3-top plate, 4-welding device, 41-upper block, 42-turn block, 43-lower block, 44-shaft rod, 45-gear, 46-thread Rod, 47-Limiting Plate, 48-Threaded Block, 49-Cross Plate, 410-Boom, 411-Welding Machine, 412-Welding Rod, 413-Guide Rod, 414-Limiting Block, 5-Locating Device, 51- Stabilizing Block, 52-Threaded Post, 53-Baffle, 54-Active Block, 55-L-Rod, 56-Clamp, 561-Strut, 562-Support Frame, 563-Motor, 564-Turntable, 565- connecting rod, 566-threaded disc, 567-stud, 568-limit disc, 569-clamping block, 57-slide rod, 58-buffer spring, 59-synchronizer, 591-pillar, 592-synchronizing block, 593 -Hinged lever, 6-Linkage, 61-Linkage block, 62-First linkage lever, 63-Second linkage lever, 64-Ring frame, 65-Rack, 66-Pulley, 67-Chute, 7-Control Handle, 71-handle, 72-turntable, 73-through hole, 74-fixer, 741-sleeve, 742-ejector spring, 743-slider, 744-notch, 745-inclined block, 746-push rod , 747 - push handle, 748 - fixed spring, 749 - fixed rod, 7410 - pressure rod; 7411 - guide rod, 7412 - guide sleeve.

Embodiments of the present invention

The technical solution of the present patent will be described in further detail below in conjunction with specific embodiments.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

As shown in FIG. 1, it is a structural diagram of a fixing device for welding metal products provided by an embodiment of the present invention, including:

Base 1, side plates 2 are fixed on the upper surfaces of the left and right sides of the base 1, a top plate 3 is fixed at the top of the side plate 2, and a welding device 4 is arranged through and rotated through the top plate 3, and the lower side of the welding device 4 is arranged There is a positioning device 5 , a linkage device 6 penetrates through the upper right end of the positioning device 5 , the top left side of the linkage device 6 is fixed with the welding device 4 , and a controller 7 is fixed at the left end of the positioning device 5 .

In an embodiment of the present invention, when using the device, first put the two metals to be welded into the positioning device 5, then rotate the controller 7, and the controller 7 drives the positioning device 5 to clamp and fix the metal products , and at the same time, driven by the linkage device 6, the welding device 4 descends to weld and fix the contact position of the two metals.

As shown in FIG. 1 , as a preferred embodiment of the present invention, the welding device 4 includes an upper block 41 , and a rotating block 42 is fixed at the lower end of the upper block 41 , and the rotating block 42 penetrates through the middle of the top plate 3 and It is rotatably connected with the top plate 3, the lower end of the rotating block 42 is fixed with a lower stopper 43, the lower end of the lower stopper 43 is fixed with a shaft 44, and the outer periphery of the shaft 44 is fixed with a gear 45, the gear 45 and the linkage device 6. The upper left end is matched, the lower end of the shaft rod 44 is fixed with a threaded rod 46, the lower end of the threaded rod 46 is fixed with a limiting plate 47, the threaded rod 46 is threaded through a threaded block 48, and the threaded block 48 penetrates with a horizontal Plate 49, the lower end of the horizontal plate 49 is fixed with a hanger rod 410, the lower end of the hanger rod 410 is fixed with a welding machine 411, the welding machine 411 is connected with a welding rod 412, and the left and right sides of the horizontal plate 49 are pierced with guide rods 413 , the upper end of the guide rod 413 is fixed with the lower end of the top plate 3 , and the limit block 414 is fixed at the lower end of the guide rod 413 .

In an embodiment of the present invention, driven by the linkage 6, the gear 45 starts to rotate, the gear 5 drives the threaded block 48 to move downward when it rotates, and the downward movement of the threaded block 48 drives the transverse plate 49 along the guide rod 413. The downward movement ensures the stability of the downward movement. At this time, the horizontal plate 49 drives the boom 410 to move downward, and the downward movement of the boom 410 drives the welding machine 411 to move downward, thereby driving the welding rod 412 to move downward, thereby Welding of two metal products is performed.

As shown in FIG. 1 , as a preferred embodiment of the present invention, the positioning device 5 includes a stabilizing block 51 , the stabilizing block 51 penetrates the side plates 2 at the left and right ends and is rotatably connected with the side plates 2 . The stabilizing blocks 51 are fixed with threaded posts 52 at the mutually close ends, the threaded posts 52 are provided with two left and right, and the mutually close ends are fixed with baffles 53, and the left and right threaded posts 52 thread through the movable blocks 54, two. An L-shaped rod 55 is fixed on the upper surface of the movable block 54 , a clamp 56 is fixed at the close ends of the two L-shaped rods 55 , and a sliding rod 57 penetrates through the lower side of the movable block 54 , and the sliding rod 57 The left and right ends and the left and right side plates 2 are fixed to each other close to each other, and the two movable blocks 54 are fixed at the mutually distant ends and the two mutually close ends of the two side plates 2 are fixed with a buffer spring 58 that is screwed on the periphery of the sliding rod 57. A synchronizer 59 is hinged on the lower side of the two movable blocks 54 .

In an embodiment of the present invention, when performing fixed clamping, the controller 7 is rotated, and the controller 7 drives the left threaded post 52 to rotate, and when the left threaded post 52 rotates, it drives the left movable block 54 to rotate along the The sliding rod 57 moves to the right. At this time, under the action of the synchronizer 59, the synchronizer 59 drives the movable block 54 on the right side to move to the right along the sliding rod 57, and then drives the threaded column 52 on the right side to rotate, thereby making the linkage The device 6 moves to the left, and then drives the two L-shaped rods 55 to move towards each other, so that the two clamps 56 move towards each other, so that the positions of the two metals to be welded are close to each other. welding.

As shown in FIG. 2 , as a preferred embodiment of the present invention, the clamp 56 includes a support rod 561 , the ends of the support rod 561 and the L-shaped rod 55 are fixed to each other, and the right end of the support rod 561 is fixed with a support Frame 562, a motor 563 is fixed on the inner walls of the left and right ends of the support frame 562, a turntable 564 is fixed on the output shaft of the motor 563, and a connecting rod 565 is fixed at one end of the turntable 564 away from the motor 563, and the connecting rod 565 is far away from the turntable One end of 564 is fixed with a threaded disk 566, the thread of the threaded disk 566 is threaded through a stud 567, the left and right ends of the stud 567 are fixed with a limit disk 568, and the right end of the limit disk 568 on the right side is fixed with a clamping block 569 , the clamping blocks 569 are provided with two and symmetrically distributed.

In an embodiment of the present invention, when the metal to be welded is clamped, the motor 563 is turned on, the rotation of the motor 563 drives the rotation of the turntable 564, the rotation of the turntable 564 drives the rotation of the connecting rod 565, and the rotation of the connecting rod 565 drives the rotation of the threaded disk 566, When the threaded disk 566 rotates, it drives the two studs 567 to move toward each other, so that the two clamping blocks 569 move toward each other, thereby clamping the metal to be welded.

As shown in FIG. 1 , as a preferred embodiment of the present invention, the synchronizer 59 includes a strut 591 , the lower end of the strut 591 is fixed to the upper surface of the middle part of the base 1 , and the upper end of the strut 591 is lower than the middle part of the sliding rod 57 . The surfaces are fixed, and a synchronizing block 592 is slidably sleeved on the periphery of the pillar 591. The synchronizing block 592 is hinged with a hinge rod 593. The blocks 54 are hinged.

In an embodiment of the present invention, when the left movable block 54 moves to the right, the left movable block 54 drives the left hinge rod 593 to push the synchronizing block 592 to move down along the support 591, and the synchronizing block 592 moves toward the During the downward movement, the right hinge rod 593 is driven to move downward, and the right hinge rod 593 moves downward to drive the right movable block 54 to move leftward along the sliding rod 57, thereby playing the role of the left movable block 54 and the right movable block 54. The active block 54 on the side synchronizes the action.

As shown in FIG. 1 and FIG. 3 , as a preferred embodiment of the present invention, the linkage device 6 includes a linkage block 61 , and the linkage block 61 and the threaded post 52 on the right side pass through and are threadedly connected. A first linkage rod 62 is fixed on the upper surface of the block 61 , a second linkage rod 63 is fixed on the left end of the first linkage rod 62 , a ring frame 64 is fixed on the right end of the second linkage rod 63 , and the inner wall of the upper end of the ring frame 64 is fixed There is a rack 65, the rack 65 and the gear 45 are hinged, the gear 45 is fixed with a pulley 66, the pulley 66 is slidably fitted with a sliding groove 67, and the sliding groove 47 is in contact with the upper surface of the bottom end of the ring frame 64. fixed.

In one embodiment of the present invention, when the right threaded post 52 rotates, the right threaded post 52 drives the linkage block 61 to move to the left, and the linkage block 61 moves to the left to drive the first linkage rod 62 to move to the left. The linkage rod 62 drives the second linkage rod 63 to move to the left, and the second linkage rod 63 drives the annular frame 64 to move to the left, thereby driving the gear 45 to rotate around the shaft 44, so that the welding machine 411 gradually descends for welding.

As shown in FIG. 4 , as a preferred embodiment of the present invention, the controller 7 includes a handle 71 , and a turntable 72 is fixed at the right end of the handle 71 , and the rotation axis of the turntable 72 is fixed with the stabilization block 51 on the left side. A plurality of through holes 73 are formed on the periphery of the turntable 72 , and the lower end of the through holes 73 is matched with a holder 74 .

In an embodiment of the present invention, during the clamping and fixing operation of the metal to be welded, the holder 74 is pressed down, and the holder 74 gradually moves away from the through hole 73. At this time, the handle 71 is rotated, and the handle 71 drives the turntable 72 to rotate, thereby further The positioning device 5 is driven to perform positioning and clamping. After clamping, the holder 74 is pulled to the left. At this time, the holder 74 pops up and enters the through hole 73 to complete the fixing again.

As shown in FIG. 4 , as a preferred embodiment of the present invention, the holder 74 includes a sleeve 741 , an ejection spring 742 is fixed at the lower end of the sleeve 741 , and a slider is fixed at the upper end of the ejection spring 742 743, the left end of the slider 743 is provided with a slot 744, the slot 744 is matched with an inclined block 745, the left end of the inclined block 745 is fixed with a push rod 746, and the left end of the push rod 746 is fixed with a push handle 747, The two push rods 746 are provided with fixed springs 748 at the mutually close ends, and the left and right ends of the fixed springs 748 are respectively fixed with the inner wall of the left end of the sleeve 741 and the left end of the inclined block 745; the upper end of the slider 743 is fixed with a fixed rod 749 , the fixing rod 749 penetrates the top of the sleeve 741 and the upper side is matched with the through hole 73, the middle of the left end of the fixing rod 749 is fixed with a pressure rod 7410; the upper surface of the left and right ends of the slider 743 is fixed with a guide rod 7411, The upper end of the guide rod 7411 is fitted with a guide sleeve 7412 , and the upper end of the guide sleeve 7412 is fixed to the inner wall of the upper end of the sleeve 741 .

In an embodiment of the present invention, when the metal is fixed and clamped, the pressing rod 7410 is first pressed down, and the pressing rod 7410 drives the fixed rod 749 to move downward and away from the through hole 73, and at the same time, the fixed rod 749 drives the sliding The block 743 moves downward. When the notch 744 of the slider 743 is flush with the inclined block 745, under the action of the fixing spring 748, the inclined block 745 enters the notch 744. At this time, the ejection spring 742 is compressed, and the fixing is completed. For the fixing of the rod 749, after the fixing is completed, the handle 71 can be rotated to clamp and fix the metal. The guide rod 7411 and the guide sleeve 7412 play the role of stable guidance. The 747 drives the inclined block 745 to move to the left, so that the inclined block 745 leaves the slot 744 of the slider 743. At this time, under the action of the ejection spring 742, the ejection spring 742 drives the slider 743 to move upward, and then drives the fixed rod 749 moves upward and enters the through hole 73, thereby completing the fixing of the turntable 72 and preventing it from rebounding.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims

A fixing device for welding metal products, comprising a base (1), characterized in that, side plates (2) are fixed on the upper surfaces of the left and right sides of the base (1), and a top plate (2) is fixed at the top of the side plate (2). 3) A welding device (4) is provided through and rotated through the top plate (3), a positioning device (5) is provided on the lower side of the welding device (4), and a linkage device is penetrated through the upper right end of the positioning device (5). (6), the top left side of the linkage device (6) is fixed with the welding device (4), and the left end of the positioning device (5) is fixed with a controller (7).
The fixing device for welding metal products according to claim 1, characterized in that, the welding device (4) comprises an upper stopper (41), and a turning block (42) is fixed at the lower end of the upper stopper (41), The rotating block (42) penetrates through the middle of the top plate (3) and is rotatably connected to the top plate (3). A shaft rod (44), a gear (45) is fixed on the periphery of the shaft rod (44), the gear (45) is matched with the upper left end of the linkage device (6), and a threaded rod is fixed at the lower end of the shaft rod (44) (46), a limiting plate (47) is fixed at the lower end of the threaded rod (46), a threaded block (48) is threaded through the threaded rod (46), and a transverse plate (49) is threaded through the threaded block (48) , a hanger rod (410) is fixed at the lower end of the horizontal plate (49), a welding machine (411) is fixed at the lower end of the hanger rod (410), and a welding rod (412) is connected to the welding machine (411). Guide rods (413) run through the left and right sides of the plate (49), the upper end of the guide rod (413) is fixed with the lower end of the top plate (3), and the limit block (414) is fixed at the lower end of the guide rod (413).
The fixing device for welding metal products according to claim 1, characterized in that, the positioning device (5) comprises a stabilizing block (51), the stabilizing block (51) penetrates through the side plates (2) at the left and right ends and and The side plates (2) are rotatably connected, and the stabilizing blocks (51) on the left and right sides are fixed with threaded posts (52) at the mutually close ends. 53), the left and right two threaded posts (52) are threaded with movable blocks (54), L-shaped rods (55) are fixed on the upper surfaces of the two movable blocks (54), and the two L-shaped rods ( 55) A clamp (56) is fixed at the mutually approaching ends, a sliding rod (57) runs through the lower side of the movable block (54), the left and right ends of the sliding rod (57) and the left and right side plates (2) The close ends of the two movable blocks ( 54 ) are fixed to each other, and the ends of the two movable blocks ( 54 ) that are far away from each other and the close ends of the two side plates ( 2 ) are fixed with a buffer spring ( 58 ) screwed around the periphery of the sliding rod ( 57 ). A synchronizer (59) is hinged on the lower side of the movable block (54).
The fixing device for welding metal products according to claim 3, characterized in that, the clamp (56) comprises a support rod (561), and the end of the support rod (561) and the L-shaped rod (55) are fixed to each other , a support frame (562) is fixed at the right end of the support rod (561), a motor (563) is fixed on the inner walls of the left and right ends of the support frame (562), and a turntable (564) is fixed on the output shaft of the motor (563), A connecting rod (565) is fixed at one end of the turntable (564) away from the motor (563), and a threaded disc (566) is fixed at one end of the connecting rod (565) away from the turntable (564). A stud (567) runs through the thread, a limit disk (568) is fixed at the left and right ends of the stud (567), and a clamping block (569) is fixed on the right end of the limit disk (568) on the right side. The tight blocks (569) are provided in two and symmetrically distributed.
The fixing device for welding metal products according to claim 3, characterized in that, the synchronizer (59) comprises a strut (591), and the lower end of the strut (591) is fixed to the upper surface of the middle part of the base (1), so The upper end of the strut (591) is fixed to the lower surface of the middle part of the sliding rod (57), and a synchronizing block (592) is slidably sleeved on the periphery of the strut (591). The synchronizing block (592) is hinged with a hinge rod (593), so The hinge rods (593) are provided with two left and right rods, and the upper ends of the two left and right hinge rods are hinged with the two movable blocks (54).
The fixing device for welding metal products according to claim 3, characterized in that the linkage device (6) comprises a linkage block (61), and the linkage block (61) and the threaded post (52) on the right side pass through and threaded connection, a first linkage rod (62) is fixed on the upper surface of the linkage block (61), a second linkage rod (63) is fixed on the left end of the first linkage rod (62), and the second linkage rod ( 63) An annular frame (64) is fixed at the right end, a rack (65) is fixed on the inner wall of the upper end of the annular frame (64), the rack (65) is hinged with the gear (45), and the gear (45) is fixed There is a pulley (66), the pulley (66) is slidably fitted with a chute (67), and the chute (47) is fixed to the upper surface of the bottom end of the annular frame (64).
The fixing device for welding metal products according to claim 3, wherein the controller (7) comprises a handle (71), and a turntable (72) is fixed on the right end of the handle (71), and the turntable (72) ) The rotating shaft is fixed with the stabilization block (51) on the left side, a plurality of through holes (73) are formed on the periphery of the rotating plate (72), and the lower end of the through holes (73) is fitted with a fixer (74).
The fixing device for welding metal products according to claim 7, wherein the fixing device (74) comprises a sleeve (741), and an ejector spring (742) is fixed at the lower end of the sleeve (741), so A slider (743) is fixed on the upper end of the ejection spring (742), a slot (744) is formed at the left end of the slider (743), and an inclined block (745) is arranged in the slot (744). A push rod (746) is fixed at the left end of the inclined block (745), a push handle (747) is fixed at the left end of the push rod (746), and a fixed spring (748) is provided at the close ends of the two push rods (746), The left and right ends of the fixing spring (748) are respectively fixed to the inner wall of the left end of the sleeve (741) and the left end of the inclined block (745); 749) Passing through the top end of the sleeve (741) and the upper side is matched with the through hole (73), a pressing rod (7410) is fixed in the middle of the left end of the fixing rod (749); A guide rod (7411) is fixed, the upper end of the guide rod (7411) is matched with a guide sleeve (7412), and the upper end of the guide sleeve (7412) is fixed to the inner wall of the upper end of the sleeve (741).