Strength detection equipment for continuous production of thermal transfer film for pen

Abstract

The invention provides strength detection equipment for continuous production of thermal transfer films for pens, and relates to the technical field of strength detection.The strength detection equipment comprises a base, four sets of vertical sliding rods are fixedly arranged in the middle of the front side of the top of the base, and a supporting seat is fixedly arranged at the tops of the four sets of vertical sliding rods; four supporting wheel frames are fixedly arranged at the two ends of the front side of the top of the base, and dredging wheels are rotationally arranged outside the two supporting wheel frames on the same side; a connector is fixedly arranged in the middle of the four groups of supporting wheel carriers; the pressing seat is arranged outside the four sets of vertical sliding rods in a sliding mode, and two sets of pressing rollers are rotationally arranged at the bottom of the pressing seat; through the synchronous clamping structure of the upper clamping plate and the lower clamping plate, the positioning detection effect can be achieved, the pressure resistance of the heat transfer printing film can be detected in a sampling mode, on the contrary, continuous pressure monitoring can be conducted by separating the upper clamping plate from the lower clamping plate, and meanwhile the pressure change can be monitored in real time through cooperation of the weighing sensor and the digital display A.

Description

Technical Field

[0001] This invention relates to the field of strength testing technology, and in particular to strength testing equipment for continuous production of thermal transfer film for pens. Background Technology

[0002] Heat transfer film for pens is a decorative material used to wrap pens. It is wrapped around the outside of the pen by a wrapping device. During the wrapping process, there is a pulling action. If the strength of the film is not enough, it will break during the pulling process, affecting the packaging. Therefore, it is necessary to conduct strength testing from the production output to the rewinding process to check whether it meets the standards.

[0003] The strength testing devices currently in use have the following drawbacks: The testing process uses a powered propulsion structure to increase strength, but it can only perform sampling tests and cannot perform continuous tests. It also lacks a stable pressure regulation structure to adjust the testing pressure. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a strength testing device for continuous production of thermal transfer film for pens.

[0005] This invention provides a strength testing device for continuous production of thermal transfer film for pens, specifically comprising: a base, wherein four sets of vertical slide rods are fixedly arranged in the middle of the top front side of the base, and a support base is fixedly arranged on the top of the four sets of vertical slide rods; four sets of support wheel frames are fixedly arranged at both ends of the top front side of the base, and guide wheels are rotatably arranged on the outside of the two sets of support wheel frames on the same side; and a connector is fixedly arranged in the middle of the four sets of support wheel frames. The pressing seat is slidably disposed outside four sets of vertical slide rods, and two sets of pressing rollers are rotatably disposed at the bottom of the pressing seat; a weighing sensor is fixedly disposed at the top center of the pressing seat; and four sets of short hanging rods are fixedly disposed at the top of the pressing seat. The counterweight water tank has two sets of sliding ears integrally provided on both sides of the lower part of the counterweight water tank. The sliding ears can restrict the sliding outside of the short lifting rod; the bottom of the counterweight water tank can contact the weighing sensor. The weight control device has a U-shaped structure, and a control water bladder is fixedly installed on the inner wall of the front side of the weight control device; a steel wire hose is installed at the front end of the weight control device and connected to the lower rear side of the counterweight water tank.

[0006] Optionally, an electric cylinder is fixedly installed at the top center of the support base, and a lifting plate is fixedly installed at the telescopic end of the electric cylinder; a digital display A is fixedly installed on the top front side of the support base, and the weighing sensor is connected to the digital display A via a data line; a calibration block is fixedly installed on the top front side of the base.

[0007] Optionally, the middle of the support wheel frame is rotationally provided with a synchronous gear; the rear end of the front support wheel frame and the front end of the rear support wheel frame are fixedly provided with a guide; an upper clamping plate is arranged between the front and rear support wheel frames, and the two ends of the upper clamping plate are fixedly provided with an upper rack which vertically slides in the support wheel frame; the upper rack is engaged with the synchronous gear.

[0008] Optionally, the middle of the front side of the connector is connected with an electromagnetic valve, and the front side of the electromagnetic valve is connected with an air pump; the top of the connector is fixedly provided with an air cylinder on both sides, and the telescopic end of the air cylinder is fixedly provided with a lower clamping plate, the bottom of the lower clamping plate is fixedly provided with two groups of guide rods which slide in the guide, the two ends of the lower clamping plate are fixedly provided with a lower rack which is engaged with the synchronous gear, and the upper rack and the lower rack are symmetrically arranged around the synchronous gear as the center.

[0009] Optionally, the front side of the pressing seat is fixedly provided with an infrared distance sensor which is vertically aligned with the calibration block; the front end of the pressing seat is fixedly provided with a digital display B, and the infrared distance sensor and the digital display B are connected through a data line.

[0010] Optionally, the top of the counterweight water tank is a square groove structure, a breathing hole is formed in the middle of the bottom of the square groove structure; two groups of sliding air valves are slidably arranged in the square groove structure, and a limiting pressure frame is fixedly arranged inside the square groove structure; the adjacent surfaces of the two groups of sliding air valves are convex arc surfaces, and springs are arranged in the square groove for making the two groups of sliding air valves fit together.

[0011] Optionally, the top of the counterweight water tank is fixedly provided with two groups of long lifting rods, and the long lifting rods are fixedly provided with baffle plates at the two ends of the lifting plate.

[0012] Optionally, the top of the counterweight water tank is fixedly provided with a guide plate, and the two sides of the guide plate are folded downward, and the folding parts are fixedly provided with dustproof covers.

[0013] Optionally, the middle of the counterweight device is fixedly provided with four groups of connecting guide rods; the rear end of the control water bag is fixedly provided with a sliding plate which slides outside the four groups of connecting guide rods; the rear end of the sliding plate is fixedly provided with a control screw; the rear side of the counterweight device is rotationally provided with a control nut through a bearing; the control nut is threadedly connected with the control screw; the rear side of the counterweight device is fixedly provided with a servo motor below, and the rear end of the control nut is drivingly connected with the rotor end of the servo motor through a bevel gear.

[0014] The beneficial effects are as follows: Through the synchronous clamping structure of the upper clamping plate and the lower clamping plate, positioning detection effect can be achieved, and the resistance of the heat transfer film can be sampled and detected, otherwise, the upper clamping plate and the lower clamping plate can be separated to continuously monitor the pressure, and the cooperation of the weighing sensor and the digital display A can realize real-time monitoring of the pressure change.

[0015] The weight of the counterweight water tank can be flexibly adjusted by the water injection structure of the servo motor driven water bag, so that the pressure of the heat transfer film can be accurately increased or decreased; the infrared range finder and the digital display B can capture abnormal conditions such as heat transfer film breakage or deformation in time, and the double monitoring mechanism effectively guarantees the processing quality of the heat transfer film. The counterweight water tank can automatically balance the internal air pressure through the cooperation of the sliding air valve and the flow guide plate, so as to avoid the influence of abnormal pressure in the tank caused by water volume change on the equipment operation; the linkage cooperation between the components is stable, the movement of the clamping plate is driven by the air cylinder, and the lifting of the pressing structure is driven by the electric cylinder, so that the whole equipment runs coordinately, and the strength detection effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The working state structure schematic diagram of the embodiment in the application is shown; Figure 2 The working state structure schematic diagram of the embodiment in the application is shown; Figure 1 Figure 3 The working state structure schematic diagram of the embodiment in the application is shown; Figure 4 The assembly structure schematic diagram of the support wheel frame of the embodiment in the application is shown; Figure 5 The working state structure schematic diagram of the embodiment in the application is shown; Figure 6 The side view structure schematic diagram of the counterweight water tank of the embodiment in the application is shown; Figure 7 The three-dimensional disassembly structure schematic diagram of the counterweight water tank of the embodiment in the application is shown; Figure 8 The side view structure schematic diagram of the embodiment in the application is shown. Figure 7

[0017] BRIEF DESCRIPTION OF DRAWINGS ​​1, base; 101, vertical slide bar; 102, support seat; 103, electric cylinder; 104, lifting plate; 105, digital display A; 106, calibration block; 2, support wheel frame; 201, dredging wheel; 202, synchronous gear; 203, guide; 204, upper clamping plate; 205, upper rack; 3, connector; 301, electromagnetic valve; 302, air pump; 303, air cylinder; 304, lower clamping plate; 305, guide rod; 306, lower rack; 4, pressing seat; 401, pressing roller; 402, load cell; 403, short boom; 404, infrared distance sensor; 405, digital display B; 5, counterweight water tank; 501, sliding ear; 502, breathing hole; 503, sliding air valve; 504, limit pressure frame; 505, long boom; 6, guide plate; 7, weight control device; 701, connecting guide rod; 702, control water bag; 703, sliding plate; 704, control screw; 705, control nut; 706, servo motor. DETAILED DESCRIPTION

[0018] In order to make the purpose, scheme and advantages of the technical scheme of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings of specific embodiments of the present application.

[0019] Embodiment 1: please refer to the drawings in the specification, Figures 1 to 8 as shown: The present application provides a strength detection equipment for continuous production of pen thermal transfer film, comprising: a base 1, four groups of vertical slide bars 101 are fixedly arranged on the top front side of the base 1, and support seats 102 are fixedly arranged on the top of the four groups of vertical slide bars 101; four groups of support wheel frames 2 are fixedly arranged on the top front side of the base 1, and dredging wheels 201 are rotatably arranged outside the two groups of support wheel frames 2 on the same side; a connector 3 is fixedly arranged at the position in the middle of the four groups of support wheel frames 2; A pressing seat 4 is slidably arranged outside the four groups of vertical slide bars 101, two groups of pressing rollers 401 are rotatably arranged on the bottom of the pressing seat 4; a load cell 402 is fixedly arranged on the top of the pressing seat 4; and four groups of short booms 403 are fixedly arranged on the top of the pressing seat 4. A counterweight water tank 5 is integrally arranged with two groups of sliding ears 501 on the lower side of the two sides of the counterweight water tank 5, the sliding ears 501 can be limited to slide outside the short booms 403; and the bottom of the counterweight water tank 5 can contact the load cell 402. A weight control device 7 is in U-shaped structure, a control water bag 702 is fixedly arranged on the inner wall of the front side of the weight control device 7; and a steel wire hose is arranged on the front end of the weight control device 7 and connected to the lower side of the rear side of the counterweight water tank 5.

[0020] The top middle of the support seat 102 is fixedly provided with an electric cylinder 103, and the telescopic end of the electric cylinder 103 is fixedly provided with a lifting plate 104; the top front side of the support seat 102 is fixedly provided with a digital display A 105, and the weighing sensor 402 is connected to the digital display A 105 through a data line; the top front side of the base 1 is fixedly provided with a calibration block 106.

[0021] The middle of the support wheel frame 2 is rotatably provided with a synchronous gear 202; the rear end of the front support wheel frame 2 and the front end of the rear support wheel frame 2 are fixedly provided with a guide 203; an upper clamping plate 204 is arranged between the front and rear support wheel frames 2, and the two ends of the upper clamping plate 204 are fixedly provided with an upper rack 205 which vertically slides in the support wheel frame 2; the upper rack 205 is engaged with the synchronous gear 202.

[0022] The front middle of the connector 3 is connected with an electromagnetic valve 301, and the front side of the electromagnetic valve 301 is connected with an air pump 302; the top of the connector 3 is fixedly provided with an air cylinder 303, and the telescopic end of the air cylinder 303 is fixedly provided with a lower clamping plate 304, and the bottom of the lower clamping plate 304 is fixedly provided with two groups of guide rods 305 which slide in the guide 203; the two ends of the lower clamping plate 304 are fixedly provided with a lower rack 306 which is engaged with the synchronous gear 202, and the upper rack 205 and the lower rack 306 are symmetrically arranged with the synchronous gear 202 as the center.

[0023] The front side of the pressing seat 4 is fixedly provided with an infrared distance sensor 404 which is vertically aligned with the calibration block 106; the front end of the pressing seat 4 is fixedly provided with a digital display B 405, and the infrared distance sensor 404 and the digital display B 405 are connected through a data line.

[0024] The top middle of the counterweight water tank 5 is a square groove structure, the bottom middle of the square groove structure is provided with a breathing hole 502; two groups of sliding air valves 503 are slidably arranged in the square groove structure, and a limiting pressure frame 504 is fixedly arranged inside the square groove structure; the adjacent surfaces of the two groups of sliding air valves 503 are convex arc surfaces, and springs are arranged in the square groove for making the two groups of sliding air valves 503 fit.

[0025] The top of the counterweight water tank 5 is fixedly provided with two groups of long hanging rods 505, and the two ends of the long hanging rods 505 are fixedly provided with baffles through the lifting plate 104.

[0026] The top middle of the counterweight water tank 5 is fixedly provided with a flow guide plate 6, and the two sides of the flow guide plate 6 are downwardly bent, and the bending parts are fixedly provided with dustproof covers.

[0027] The middle of the weight control device 7 is fixedly provided with four groups of connecting guide rods 701; the rear end of the water bag 702 is fixedly provided with a sliding plate 703 which slides outside the four groups of connecting guide rods 701; the rear end of the sliding plate 703 is fixedly provided with a control screw 704 in the middle; the rear side of the weight control device 7 is rotatably provided with a control nut 705 in cooperation with a bearing, and the control nut 705 is threadedly connected with the control screw 704; the lower rear side of the weight control device 7 is fixedly provided with a servo motor 706, and the rear end of the control nut 705 is provided with a bevel gear transmission connection with the rotor end of the servo motor 706.

[0028] Initial setting of the heat transfer film: pass the heat transfer film between the upper clamp plate 204 and the lower clamp plate 304, make it fit the guide wheel 201 to move, and then wind it through the winding device, use the tension generated by winding to pull the heat transfer film out of the printing equipment; Clamping and fixing of the heat transfer film: open the electromagnetic valve 301, start the air pump 302, let the air pass through the connector 3 into the air cylinder 303, make the air cylinder 303 open; after the air cylinder 303 opens, drive the lower clamp plate 304 to rise, during which the guide rod 305 slides in the guide 203 to ensure that the lower clamp plate 304 rises vertically; when the lower clamp plate 304 rises, drive the synchronous gear 202 to rotate through the lower rack 306, and the synchronous gear 202 drives the upper rack 205 to descend at the same time, so that the upper clamp plate 204 descends, finally the upper clamp plate 204 and the lower clamp plate 304 clamp the heat transfer film together to complete the fixing; Apply basic pressure: retract the electric cylinder 103, make the lifting plate 104 descend, in this process the counterweight water tank 5 synchronously descends, and then drives the pressing roller 401 to descend, the pressing roller 401 contacts the top surface of the heat transfer film, and the weight of the counterweight water tank 5, the pressing seat 4 and the associated components is applied to the heat transfer film; Adjust and monitor the pressure: when the pressure needs to be increased, start the servo motor 706, drive the control nut 705 to rotate through the bevel gear, when the control nut 705 rotates, it pushes the control screw 704 forward through the thread transmission, so that the sliding plate 703 moves forward, presses the control water bag 702, and transports the water in the control water bag 702 to the inside of the counterweight water tank 5, increases the weight of the counterweight water tank 5, so as to increase the pressure applied to the heat transfer film by the counterweight water tank 5 and the pressing seat 4; the counterweight water tank 5 is weighed by the weighing sensor 402, and the data is fed back to the digital display A 105 to display the change of pressure, because the weight of the pressing seat 4 has been recorded in the digital display A 105 in advance, so the complete weight detection can be carried out; Pressure balance of counterweight water tank 5: During the process of controlling the change of water bladder 702, the water volume in counterweight water tank 5 will change synchronously, resulting in a change in air pressure inside the tank; when the air inside the tank increases and the pressure rises, it will push open the two sets of sliding air valves 503, and the air will be discharged through the guide plate 6; conversely, when the air pressure inside the tank decreases, outside air can pass through the guide plate 6, open the two sets of sliding air valves 503 and enter the counterweight water tank 5 to maintain pressure balance.

[0029] Example 2: Abnormal Situation Handling and Continuous Monitoring: Reversing the air pump 302 causes the cylinder 303 to retract, which can reset the upper clamping plate 204 and the lower clamping plate 304, releasing the restriction on the heat transfer film; at this time, the heat transfer film is wound up, and the heat transfer film will carry the pressing roller 401 and make it rotate, realizing continuous pressure monitoring; when the heat transfer film breaks or deforms, it will cause the pressing seat 4 to drop rapidly, causing the distance between the infrared rangefinder 404 and the calibration block 106 to decrease rapidly. The infrared rangefinder 404 feeds back the signal to the digital display B405, records the abnormal situation, and can be warned by adding an alarm program in the digital display B405.

[0030] Example 3: Based on Example 1, the upper clamping plate 204 and the lower clamping plate 304 can be used for fixed detection, while the pressing roller 401 can be used to continuously provide pressure for continuous monitoring. Both can be used as needed, and intermittent sampling detection can be selected during the detection process.

[0031] The specific usage and function of this embodiment: In this invention, when used, as follows: Figure 1 In this manner, the heat transfer film is passed between the upper clamping plate 204 and the lower clamping plate 304, and moves along the guide wheel 201. The film is then wound up using a winding device, which generates tension to pull the heat transfer film out of the printing equipment. Open the solenoid valve 301, start the air pump 302 to input air through the connector 3 into the cylinder 303, expand the cylinder 303, and use the cylinder 303 to raise the lower clamping plate 304. The guide rod 305 slides in the guide member 203 to ensure that the lower clamping plate 304 rises vertically. When the lower clamping plate 304 rises, the lower rack 306 drives the synchronous gear 202 to rotate. The synchronous gear 202 simultaneously drives the upper rack 205 to descend, lowering the upper clamping plate 204. The heat transfer film is clamped and fixed by the upper clamping plate 204 and the lower clamping plate 304. The retractable electric cylinder 103 lowers the lifting plate 104. During the descent of the lifting plate 104, the counterweight water tank 5 descends synchronously, causing the pressing roller 401 to descend and contact the top surface of the heat transfer film, thus applying the weight of the counterweight water tank 5, the pressing seat 4, and related components to the heat transfer film. When the pressure needs to be increased, the servo motor 706 is started to rotate the control nut 705 through the bevel gear, and when the control nut 705 rotates, it pushes the control screw 704 forward through the threaded transmission, moves the sliding plate 703 forward, presses the control water bag 702, and transports the water in the control water bag 702 to the inside of the counterweight water tank 5, so that the weight of the counterweight water tank 5 is increased, and then the pressure applied by the counterweight water tank 5 and the pressing seat 4 to the heat transfer printing film is increased; The weighing sensor 402 weighs the counterweight water tank 5 and feeds back to the digital display A 105, which can display the change of the pressure. The weight of the pressing seat 4 is also recorded in the digital display A 105 in advance, so that complete weight detection can be carried out; At this time, the air pump 302 reverses to contract the air cylinder 303, so that the upper clamp plate 204 and the lower clamp plate 304 are reset, and the restriction on the heat transfer printing film is released. At this time, the heat transfer printing film is wound, the heat transfer printing film carries the pressing roller 401 and rotates, and continuous pressure monitoring can be realized. When the heat transfer printing film is broken or deformed, the pressing seat 4 will quickly drop, the distance between the infrared distance sensor 404 and the calibration block 106 will quickly decrease, the infrared distance sensor 404 feeds back the signal to the digital display B 405, records the abnormality, and can also increase the alarm program in the digital display B 405 to give an alarm; In the process of changing the control water bag 702, the water in the counterweight water tank 5 will also change synchronously, and then the air pressure in the counterweight water tank 5 will also change. When the air increases, the pressure increases, which will push away the two groups of sliding air valves 503 to pass through the flow guide plate 6 to discharge, and vice versa. When the air pressure decreases, the external air can enter the counterweight water tank 5 through the flow guide plate 6 to support the two groups of sliding air valves 503.

Claims

1. A strength testing device for continuous production of thermal transfer film for pens, characterized in that, include: The base (1) has four sets of vertical slide rods (101) fixedly installed in the middle of the front top of the base (1), and a support seat (102) fixedly installed on the top of the four sets of vertical slide rods (101); four sets of support wheel frames (2) are fixedly installed at both ends of the front top of the base (1), and guide wheels (201) are rotatably installed on the outside of the two sets of support wheel frames (2) on the same side; a connector (3) is fixedly installed in the middle of the four sets of support wheel frames (2); Pressing seat (4), which is slidably disposed outside four sets of vertical slide rods (101), and two sets of pressing rollers (401) are rotatably disposed at the bottom of the pressing seat (4); a weighing sensor (402) is fixedly disposed in the middle of the top of the pressing seat (4); and four sets of short hanging rods (403) are fixedly disposed at the top of the pressing seat (4). The counterweight water tank (5) has two sets of sliding ears (501) integrally provided on both sides of the lower part. The sliding ears (501) can restrict the sliding outside the short rod (403). The bottom of the counterweight water tank (5) can contact the weighing sensor (402). The weight control device (7) has a U-shaped structure. A control water bladder (702) is fixedly installed on the inner wall of the front side of the weight control device (7). A steel wire hose is installed at the front end of the weight control device (7) and connected to the lower rear side of the counterweight water tank (5).

2. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 1, characterized in that, An electric cylinder (103) is fixedly installed at the top center of the support base (102), and a lifting plate (104) is fixedly installed at the telescopic end of the electric cylinder (103); a digital display A (105) is fixedly installed on the top front side of the support base (102), and a data line of the weighing sensor (402) is connected to the digital display A (105); a calibration block (106) is fixedly installed on the top front side of the base (1).

3. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 1, characterized in that, Synchronous gears (202) are rotatably provided in the middle of each of the support wheel frames (2); guide members (203) are fixedly provided at the rear end of the front support wheel frame (2) and the front end of the rear support wheel frame (2); an upper clamping plate (204) is provided between the front and rear support wheel frames (2), and upper racks (205) are fixedly provided at both ends of the upper clamping plate (204). The upper racks (205) slide vertically in the support wheel frame (2); the upper racks (205) mesh with the synchronous gears (202).

4. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 3, characterized in that, A solenoid valve (301) is connected to the middle of the front side of the connector (3), and an air pump (302) is connected to the front side of the solenoid valve (301). A cylinder (303) is fixedly installed on both sides of the top of the connector (3). A lower clamping plate (304) is fixedly installed at the telescopic end of the cylinder (303). Two sets of guide rods (305) are fixedly installed at the bottom of the lower clamping plate (304). The guide rods (305) slide in the guide member (203). A lower rack (306) is fixedly installed at both ends of the lower clamping plate (304). The lower rack (306) meshes with the synchronous gear (202), and the upper rack (205) and the lower rack (306) are symmetrical about the synchronous gear (202).

5. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 2, characterized in that, An infrared rangefinder (404) is fixedly installed on the front side of the pressing base (4), and the infrared rangefinder (404) is vertically aligned with the calibration block (106); a digital display B (405) is fixedly installed at the front end of the pressing base (4), and the infrared rangefinder (404) and the digital display B (405) are connected by a data line.

6. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 1, characterized in that, The top of the counterweight water tank (5) is a square groove structure, and the bottom of the square groove structure is provided with an adjustment hole (502). Two sets of sliding air valves (503) are slidably arranged in the square groove structure, and a limit pressure frame (504) is fixedly arranged in the upper part of the square groove structure. The adjacent surfaces of the two sets of sliding air valves (503) are both convex arc surfaces, and a spring is also provided in the square groove to make the two sets of sliding air valves (503) fit together.

7. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 2, characterized in that, The top of the counterweight water tank (5) is fixedly equipped with two sets of long rods (505), and baffles are fixedly installed at both ends of the long rods (505) that pass through the lifting plate (104).

8. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 1, characterized in that, A guide plate (6) is fixedly installed at the top center of the counterweight water tank (5). The two sides of the guide plate (6) turn downwards, and a dust cover is fixedly installed at the turning point.

9. The strength testing equipment for continuous production of thermal transfer film for pens as described in claim 1, characterized in that, The weight control device (7) has four sets of connecting guide rods (701) fixedly installed in the middle; a sliding plate (703) is fixedly installed at the rear end of the control water bladder (702), and the sliding plate (703) slides outside the four sets of connecting guide rods (701); a control screw (704) is fixedly installed in the middle of the rear end of the sliding plate (703); a control nut (705) is rotatably installed in the middle of the rear side of the weight control device (7) in conjunction with the bearing, and the control nut (705) is threadedly connected to the control screw (704); a servo motor (706) is fixedly installed below the rear side of the weight control device (7), and the rear end of the control nut (705) is connected to the rotor end of the servo motor (706) by a bevel gear transmission.

Images