Intelligent nozzle adjusting system of anti-counterfeit label printing device

Abstract

The invention provides an intelligent nozzle adjusting system for an anti-counterfeit label printing device, and belongs to the technical field of nozzle adjusting systems, the intelligent nozzle adjusting system comprises a workbench, and an adjusting assembly, a printing assembly and a positioning assembly which are arranged on the workbench, and a first adjusting groove is formed in the upper side of the workbench. According to the device, the arranged positioning assembly fixes the lead screw when the lead screw stops rotating, so that it is guaranteed that the lead screw can be stably fixed, the situation that the position of a spray head is changed due to the fact that the lead screw rotates due to vibration is avoided, the stability of the lead screw during fixing is improved, and the subsequent printing precision is guaranteed; meanwhile, an arranged second air bag conducts secondary fixing while the first air bag conducts clamping and fixing, the fixing strength is further improved, an arranged inserting block is matched with an adjusting rod, an ejector rod is lifted while positioning pieces get close to each other, an anti-skid pad at the upper end of the ejector rod abuts against and is fixed to the side wall of a lead screw, and the fixing effect is improved; and rotation caused by vibration of the screw rod is further avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nozzle adjusting system, in particular to a kind of anti-fake label printing device nozzle intelligent adjusting system. BACKGROUND

[0002] In today's commodity market, anti-fake label as an important means to crack down on fake and inferior products, maintain brand image and consumer rights and interests, its application range is increasingly wide, from high-end luxury goods to daily consumer goods, from medicine, electronic products to tobacco and other fields, anti-fake label plays a key role.The printing quality of anti-fake label is directly related to the effectiveness and reliability of its anti-fake function.

[0003] In the prior art, nozzle adjusting device usually adopts mechanical transmission structure, such as screw nut mechanism, slide rail and slide block mechanism, etc., the position movement of nozzle in horizontal and vertical directions is realized by motor driving, the motor receives control signal, converts electric energy into mechanical energy, drives screw rod to rotate or linearly move, and then makes the nozzle bracket installed on the screw rod move along the slide rail, to realize accurate adjustment of nozzle position, however, the adjusting device at present lacks effective positioning assembly, after the position adjustment of nozzle is completed, the screw rod cannot be reliably locked, and when vibration is received, the screw rod itself will rotate to cause the position of nozzle to deviate, affecting the printing precision of anti-fake label.

[0004] How to invent a kind of anti-fake label printing device nozzle intelligent adjusting system to solve these problems has become a problem to be solved by the technical personnel in the field. SUMMARY

[0005] In order to make up for the above shortcomings, the present application provides an anti-fake label printing device nozzle intelligent adjusting system, which aims to solve the problem that the adjusting device at present lacks effective positioning assembly.

[0006] The present application is realized as follows: The present application provides an anti-fake label printing device nozzle intelligent adjusting system, which comprises a workbench, an adjusting assembly, a printing assembly and a positioning assembly arranged on the workbench, a first adjusting groove is formed on the upper side of the workbench, a first fixing groove is formed on the side of the workbench close to the first adjusting groove; The adjusting assembly comprises a first motor, a first screw rod, an adjusting seat, a first slide block, a second screw rod and a second motor, the outer wall of the first slide block is slidably connected with the inner wall of the first adjusting groove, the upper side of the adjusting seat is provided with a second adjusting groove, the side walls of the first screw rod and the second screw rod close to the first fixing groove and the second fixing groove are provided with ring grooves, and the outer wall of the ring groove is provided with a non-slip ring; The printing assembly comprises a fixing seat, a storage box, a nozzle and an electrical box, the bottom end outer wall of the fixing seat is slidably connected with the inner wall of the second adjusting groove; Two positioning assemblies are respectively installed in the first fixed groove and the second fixed groove, and each positioning assembly comprises a fixed box, an electromagnet, an adjusting block, a limiting rod, a magnet, a fastening clamp and a first air bag.

[0007] Preferably, the first motor is installed on the outer wall of the workbench near the first fixed groove, the two ends of the first lead screw are rotationally connected to the inner wall of the first adjusting groove, the output end of the first motor is fixedly connected to one end of the first lead screw, the upper end of the first sliding block is fixedly connected to the bottom end of the adjusting seat, and the inner wall of the first sliding block is threadedly connected to the outer wall of the first lead screw.

[0008] Preferably, the two ends of the second lead screw are rotationally connected to the inner wall of the second adjusting groove, and the second motor is installed on the outer wall of the adjusting seat.

[0009] Preferably, the lower end of the inner wall of the fixed seat is threadedly connected to the outer wall of the second lead screw, the storage box is fixed above the fixed seat, the inside of the storage box is filled with printing liquid, the nozzle is fixed to the inner wall of one side of the fixed seat, a spray pipe is connected between the input end of the nozzle and the storage box, and the electrical box is internally provided with devices for controlling the operation of the entire printing assembly.

[0010] Preferably, the two fixed boxes in one set of the positioning assemblies are symmetrically fixed to the inner walls of the two sides of the first fixed groove, the electromagnet is fixedly connected to the inner wall of one side of the fixed box, the outer wall of the limiting rod is slidingly connected to the inner wall of one side of the fixed box, one end of the limiting rod is provided with a magnet that is magnetically connected to the electromagnet, and one end of the limiting rod is fixedly connected to the side wall of the fastening clamp.

[0011] Preferably, the outer wall of the limiting rod is sleeved with a first spring, the two end side walls of the first spring are respectively fixedly connected to the side wall of the fastening clamp and the side wall of the fixed box, and the side wall of the fastening clamp is fixedly connected with a first air bag that is abutted with the anti-slip ring.

[0012] Preferably, one end of the adjusting block is fixedly connected to the bottom end of the fastening clamp, a piston cavity is formed in the inside of the adjusting block, a piston plate is piston-connected to the inner wall of the piston cavity, a second spring is fixedly connected to the bottom end of the piston plate, and the air pipe of the first air bag is in communication with the inside of the piston cavity.

[0013] Preferably, a fixed frame is installed on the outer wall of the ring groove, a fixed rod that is fixedly connected to the fixed groove is fixedly connected to the bottom end of the fixed frame, a second air bag is fixedly connected to the inner wall of the fixed frame, and a telescopic hose that is in communication with the inside of the piston cavity is installed on the inner wall of the second air bag.

[0014] Preferably, the side wall of one of the adjusting blocks is provided with a slot, the side wall of the slot is provided with a sliding groove, and one side of the other adjusting block is fixedly connected with an insertion block in sliding connection with the slot.

[0015] Preferably, the inner wall of the sliding groove is in sliding connection with an adjusting rod in abutment with the upper inclined surface of the insertion block, one end of the adjusting rod is provided with a jacking rod, and one end of the jacking rod is fixedly connected with an anti-skid pad in abutment with the lead screw.

[0016] The present application has the following advantages: The positioning assembly is arranged to fix the lead screw when the lead screw stops rotating, the deformability of the first air bag allows uniform pressure to be applied to the contact surface while abutting against the anti-skid ring, so that the lead screw is balanced in all directions, and can be closely attached to the surface of the anti-skid ring to ensure a large contact area and improve the stability of clamping, thereby ensuring that the lead screw can be stably fixed and avoiding rotation of the lead screw due to vibration, which in turn causes the position of the nozzle to change, thereby improving the stability of the lead screw during fixing and ensuring the subsequent printing precision. The second air bag is arranged to perform secondary fixation while the first air bag is clamping and fixing, further improving the strength of fixation, and the insertion block cooperates with the adjusting rod to lift the jacking rod when the positioning members are close to each other, so that the anti-skid pad at the upper end of the jacking rod is in abutment with the side wall of the lead screw to improve the fixing effect and further avoid rotation of the lead screw due to vibration. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is a schematic diagram of the overall structure of the intelligent nozzle adjusting system of the anti-fake label printing device provided by the embodiments of the present application; Figure 2 is a half-section view of the overall structure of the intelligent nozzle adjusting system of the anti-fake label printing device provided by the embodiments of the present application; Figure 3 is a schematic diagram of the intelligent nozzle adjusting system of the anti-fake label printing device provided by the embodiments of the present application; Figure 2 is an enlarged view of the A area structure in the intelligent nozzle adjusting system of the anti-fake label printing device; Figure 4 is a schematic diagram of the positioning assembly in the intelligent nozzle adjusting system of the anti-fake label printing device provided by the embodiments of the present application; Figure 5It is the positioning assembly structure sectional view of the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application; Figure 6 It is the semi-sectional view of the positioning assembly of the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application; Figure 7 It is the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application Figure 6 The B area structure enlarged view in the above; Figure 8 It is the sectional view of the positioning assembly of the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application; Figure 9 It is the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application Figure 8 The C area structure enlarged view in the above; Figure 10 It is the local area sectional view of the positioning assembly of the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application; Figure 11 It is the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application Figure 10 The D area structure enlarged view in the above; Figure 12 It is the side view of the positioning assembly of the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application; Figure 13 It is the intelligent adjustment system of the nozzle of the anti-fake label printing device provided by the embodiment of the application Figure 12 The E area structure enlarged view in the above.

[0019] In the figure: 1, workbench; 11, first adjusting groove; 12, first fixed groove; 2, adjusting assembly; 21, first motor; 22, first screw rod; 23, adjusting seat; 231, second adjusting groove; 232, second fixed groove; 24, first sliding block; 25, second screw rod; 26, second motor; 27, ring groove; 271, anti-skid ring; 3, printing assembly; 31, fixed seat; 32, storage box; 33, nozzle; 331, spray pipe; 34, electrical box; 4, positioning assembly; 41, fixed box; 411, electromagnet; 42, adjusting block; 421, piston cavity; 422, insertion slot; 423, sliding slot; 43, limiting rod; 431, magnet; 432, fastening clamp; 433, first air bag; 44, first spring; 45, piston sheet; 451, second spring; 46, fixed frame; 461, fixed rod; 47, second air bag; 471, telescopic hose; 48, insertion block; 49, adjusting rod; 491, jacking rod; 492, anti-skid pad. DETAILED DESCRIPTION

[0020] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0021] Embodiments, with reference to Figures 1-13 The anti-fake label printing device nozzle intelligent adjusting system comprises a workbench 1, an adjusting assembly 2, a printing assembly 3 and a positioning assembly 4 arranged on the workbench 1, a first adjusting groove 11 is formed on the upper side of the workbench 1, and a first fixing groove 12 is formed on the side of the workbench 1 close to the first adjusting groove 11; The adjusting assembly 2 comprises a first motor 21, a first lead screw 22, an adjusting seat 23, a first sliding block 24, a second lead screw 25 and a second motor 26, the outer wall of the first sliding block 24 is slidably connected with the inner wall of the first adjusting groove 11, the upper side of the adjusting seat 23 is provided with a second adjusting groove 231, the side walls of the first lead screw 22 and the second lead screw 25 close to the first fixing groove 12 and the second fixing groove 232 are provided with annular grooves 27, and the outer walls of the annular grooves 27 are mounted with anti-skid rings 271; The printing assembly 3 comprises a fixing seat 31, a storage box 32, a nozzle 33 and an electrical box 34, and the bottom end outer wall of the fixing seat 31 is slidably connected with the inner wall of the second adjusting groove 231; Two positioning assemblies 4 are arranged in the first fixing groove 12 and the second fixing groove 232 respectively, and the positioning assembly 4 comprises a fixing box 41, an electromagnet 411, an adjusting block 42, a limiting rod 43, a magnet 431, a fastening clamp 432 and a first air bag 433.

[0022] Further, the first motor 21 is installed on the outer wall of the workbench 1 near the first fixed groove 12, the two ends of the first screw rod 22 are rotationally connected with the inner wall of the first adjusting groove 11, the output end of the first motor 21 is fixedly connected with one end of the first screw rod 22, the upper end of the first sliding block 24 is fixedly connected with the bottom end of the adjusting seat 23, the inner wall of the first sliding block 24 is threadedly connected with the outer wall of the first screw rod 22, the two ends of the second screw rod 25 are rotationally connected with the inner wall of the second adjusting groove 231, the second motor 26 is installed on the outer wall of the adjusting seat 23, the output end of the second motor 26 is fixedly connected with one end of the second screw rod 25, the lower end inner wall of the fixing seat 31 is threadedly connected with the outer wall of the second screw rod 25, the storage box 32 is fixed above the fixing seat 31, the inside of the storage box 32 is filled with printing liquid, the nozzle 33 is fixed on the inner wall of one side of the fixing seat 31, the input end of the nozzle 33 is connected with the storage box 32 through the spray pipe 331, the electrical box 34 is internally provided with devices for controlling the work of the whole printing assembly 3, two fixed boxes 41 of one set of positioning assemblies 4 are symmetrically fixed on the inner walls of the two sides of the first fixed groove 12, the electromagnet 411 is fixedly connected on the inner wall of one side of the fixed box 41, the outer wall of the limiting rod 43 is slidably connected with the inner wall of one side of the fixed box 41, one end of the limiting rod 43 is provided with the magnet 431 which is magnetically attracted to the electromagnet 411, one end of the limiting rod 43 is fixedly connected with the side wall of the fastening clamp 432, the outer wall of the limiting rod 43 is sleeved with the first spring 44, the two end side walls of the first spring 44 are respectively fixedly connected with the side wall of the fastening clamp 432 and the side wall of the fixed box 41, and the side wall of the fastening clamp 432 is fixedly connected with the first air bag 433 which abuts against the anti-skid ring 271.

[0023] It needs to be explained: the product to be printed is placed on the workbench 1, the program is set through the electrical box 34 to control the rotation of the first lead screw 22 and the second lead screw 25, so as to adjust the printing path and position (the prior art will not be described in detail here), while the adjusting assembly 2 controls the position of the printing assembly 3, the electromagnet 411 is energized and the magnet 431 at one end of the limiting rod 43 is magnetically attracted, at this time the limiting rod 43 is forced to compress the first spring 44 to move to one side of the fixed box 41, so as to realize and fasten the clamp 432 away from the ring groove 27 to move, so that the first air bag 433 on the fastening clamp 432 and the anti-skid ring 271 on the outer wall of the ring groove 27 are separated, and after each printing position adjustment is completed, the adjusting assembly 2 stops working to fix the lead screw, when the lead screw stops rotating, the electromagnet 411 is de-energized, under the action of the restoring force of the first spring 44, the limiting rod 43 returns to its original position, so that the first air bag 433 on one side of the fastening clamp 432 is tightly attached to the anti-skid ring 271 of the ring groove 27, through the deformability of the first air bag 433, it can uniformly apply pressure on the contact surface while resisting the anti-skid ring 271, so that the lead screw is balanced in all directions, and it can be tightly attached to the surface of the anti-skid ring 271, ensuring a large contact area and improving the stability of clamping, so as to ensure that the lead screw can be stably fixed, avoiding the lead screw from rotating due to vibration, thereby improving the stability of the lead screw during fixing and ensuring the printing accuracy.

[0024] Further, one end of the adjusting block 42 and the bottom end of the fastening clamp 432 are fixedly connected, the inside of the adjusting block 42 is provided with a piston cavity 421, the inner wall of the piston cavity 421 is connected with a piston sheet 45, the bottom end of the piston sheet 45 is provided with a second spring 451 fixedly connected with the inner wall of the piston cavity 421, the gas pipe of the first air bag 433 is in communication with the inside of the piston cavity 421, the outer wall of the ring groove 27 is provided with a fixed frame 46, the bottom end of the fixed frame 46 is fixedly connected with a fixed rod 461 fixedly connected with the fixed groove, the inner wall of the fixed frame 46 is fixedly connected with a second air bag 47, the inner wall of the second air bag 47 is provided with a flexible hose 471 in communication with the inside of the piston cavity 421, one side wall of one of the adjusting blocks 42 is provided with a slot 422, the side wall of the slot 422 is provided with a sliding groove 423, the other side of the other adjusting block 42 is fixedly connected with a plug 48 slidingly connected with the slot 422, the inner wall of the sliding groove 423 is slidingly connected with an adjusting rod 49 abutting against the upper inclined surface of the plug 48, one end of the adjusting rod 49 is provided with a top rod 491, one end of the top rod 491 is fixedly connected with an anti-skid pad 492 abutting against the lead screw.

[0025] Need to explain is: in the screw stop through the positioning assembly 4 fixed at the same time, when the fastening clamp 432 close to the ring groove 27, the first air bag 433 and the anti-skid ring 271 tightly extruded together, so that the first air bag 433 is subjected to greater pressure, the cavity area in its interior at this time becomes smaller, the internal pressure becomes larger, so that air enters the piston cavity 421 in the adjusting block 42, pushes down the piston sheet 45 to make it extrude the second spring 451 to move downward, the piston cavity 421 through the extension hose 471 connected the cavity in the second air bag 47 becomes smaller, so that the air pressure in the second air bag 47 becomes larger, the gas in the piston cavity 421 enters the second air bag 47, so that it expands to make the inner wall and the outer wall of the anti-skid ring 271 abut and fix, through the friction between the second air bag 47 and the anti-skid ring 271, further fix the position of the screw, improve the stability of the screw, ensure that it is not subject to vibration and rotation; In the process of approaching, the plug 48 is inserted into the insertion slot 422, the upper end of the inclined surface of the plug 48 abuts against the bottom end of the adjusting rod 49 to make it slide upward in the sliding groove 423, at the same time, the adjusting rod 49 on one side of the adjusting rod 49 and the top rod 491 move upward, until the upper end of the anti-skid pad 492 of the top rod 491 abuts against the side wall of the screw, improve the pressure between the anti-skid pad 492 and the screw, so as to improve the friction force of the contact surface, improve the fixing effect, further avoid the rotation of the screw caused by vibration.

[0026] Need to explain is, the specific model of motor needs to be selected according to the actual size of the device, the specific selection calculation method adopts the existing technology in the art, so it is not described in detail.

[0027] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An intelligent nozzle adjustment system for an anti-counterfeiting label printing device, comprising a workbench (1) and an adjustment component (2), a printing component (3) and a positioning component (4) arranged on the workbench (1), characterized in that: A first adjustment slot (11) is provided on the upper side of the workbench (1), and a first fixing slot (12) is provided on a side of the workbench (1) close to the first adjustment slot (11); The adjustment assembly (2) includes a first motor (21), a first screw rod (22), an adjustment seat (23), a first slider (24), a second screw rod (25) and a second motor (26); the outer wall of the first slider (24) is slidably connected to the inner wall of the first adjustment groove (11); the upper side of the adjustment seat (23) is provided with a second adjustment groove (231); the side walls of the first screw rod (22) and the second screw rod (25) close to the first fixed groove (12) and the second fixed groove (232) are provided with an annular groove (27); the outer wall of the annular groove (27) is provided with an anti-slip ring (271); The printing assembly (3) comprises a fixing seat (31), a storage box (32), a nozzle (33) and an electrical box (34), wherein the outer wall of the bottom end of the fixing seat (31) and the inner wall of the second adjustment groove (231) are slidably connected; The two positioning assemblies (4) are respectively installed in the first fixing groove (12) and the second fixing groove (232), and the positioning assembly (4) includes a fixing box (41), an electromagnet (411), an adjustment block (42), a limiting rod (43), a magnet (431), a fastening clamp (432), and a first airbag (433).

2. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 1, characterized in that: The first motor (21) is mounted on an outer wall of a side of the workbench (1) close to the first fixed groove (12); both ends of the first screw rod (22) are rotatably connected to the inner wall of the first adjustment groove (11); the output end of the first motor (21) is fixedly connected to one end of the first screw rod (22); the upper end of the first slider (24) is fixedly connected to the bottom end of the adjustment seat (23); and the inner wall of the first slider (24) is threadedly connected to the outer wall of the first screw rod (22).

3. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 2, characterized in that: The two ends of the second screw rod (25) are rotatably connected to the inner wall of the second adjustment slot (231), the second motor (26) is mounted on one side outer wall of the adjustment seat (23), and the output end of the second motor (26) is fixedly connected to one end of the second screw rod (25).

4. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 3, characterized in that: The inner wall of the lower end of the fixing seat (31) is threadedly connected to the outer wall of the second screw (25). The storage box (32) is fixed above the fixing seat (31). The interior of the storage box (32) is filled with printing liquid. The nozzle (33) is fixed to the inner wall of one side of the fixing seat (31). A nozzle (331) is connected between the input end of the nozzle (33) and the storage box (32). The electrical box (34) is provided with a device for controlling the operation of the entire printing assembly (3).

5. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 4, characterized in that: Two fixing boxes (41) in one group of the positioning components (4) are symmetrically fixed to the inner walls on both sides of the first fixing groove (12), the electromagnet (411) is fixedly connected to the inner wall of one side of the fixing box (41), the outer wall of the limiting rod (43) is slidably connected to the inner wall of one side of the fixing box (41), one end of the limiting rod (43) is provided with a magnet (431) magnetically connected to the electromagnet (411), and one end of the limiting rod (43) is fixedly connected to the side wall of the fastening clamp (432).

6. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 5, characterized in that: The outer wall of the limiting rod (43) is sleeved with a first spring (44), and the side walls at both ends of the first spring (44) are fixedly connected to the side walls of the fastening clamp (432) and the fixing box (41), respectively. The side wall of the fastening clamp (432) is fixedly connected to the first air bag (433) that abuts the anti-slip ring (271).

7. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 1, characterized in that: One end of the regulating block (42) is fixedly connected to the bottom end of the fastening clamp (432), a piston cavity (421) is provided inside the regulating block (42), an inner wall piston of the piston cavity (421) is connected to a piston plate (45), a second spring (451) fixedly connected to the inner wall of the piston cavity (421) is installed at the bottom end of the piston plate (45), and the air pipe of the first airbag (433) is communicated with the interior of the piston cavity (421).

8. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 7, characterized in that: A fixing frame (46) is mounted on the outer wall of the annular groove (27), a fixing rod (461) fixedly connected to the fixing groove is fixedly connected to the bottom end of the fixing frame (46), a second airbag (47) is fixedly connected to the inner wall of the fixing frame (46), and a telescopic hose (471) communicating with the interior of the piston chamber (421) is mounted on the inner wall of the second airbag (47).

9. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 1, characterized in that: A slot (422) is provided on the side wall of one of the adjustment blocks (42), a sliding groove (423) is provided on the side wall of the slot (422), and an insert block (48) is fixedly connected to one side of the other adjustment block (42) and is slidably connected to the slot (422).

10. The intelligent nozzle adjustment system for anti-counterfeiting label printing device according to claim 9, characterized in that: The inner wall of the slide groove (423) is slidably connected to an adjustment rod (49) that abuts against the upper inclined surface of the insert block (48), one end of the adjustment rod (49) is installed with a push rod (491), and one end of the push rod (491) is fixedly connected to an anti-slip pad (492) that abuts against the screw rod.

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