Multifunctional high-frequency constant current source connecting device

Abstract

The utility model relates to a multifunctional high-frequency constant current source connecting device, which is characterized in that a first mounting frame and a second mounting frame are movably sleeved on the outer side of a cabinet, a hollow frame is fixedly mounted on the other side edges of the first mounting frame and the second mounting frame, and a first storage frame and a second storage frame are fixedly mounted at two ends of the side edges of the hollow frame respectively; the first mounting frame and the second mounting frame are arranged in the hollow frame, the first storage frame and the second storage frame are arranged outside the hollow frame in a diagonal mode, and transmission push plates are installed on the side edges of the first mounting frame and the second mounting frame in a sliding mode. Therefore, the transmission push plate and the limiting clamping frame can be fully attached to different wall surfaces of the cabinet so as to realize the installation of the fixing plate and the wire fixing position, the operation steps required by an operator for adjusting the wire fixing position are simplified, and the whole wire fixing connection mechanism can conveniently adjust the connection and fixation applicability according to the sizes of different cabinets.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency constant current source technology, specifically a multifunctional high-frequency constant current source connection device. Background Technology

[0002] A high-frequency constant current source is a power supply device that can output a high-frequency constant current. It is widely used in fields such as communications, electronic testing, and LED lighting. Through precise circuit design and control, it ensures the stability and accuracy of the output current under high-frequency operating conditions.

[0003] According to the published patent CN211238882U, a high-frequency constant current source connection device is disclosed, which relates to the field of environmental protection equipment technology. The connection device includes an insulating sleeve, the inner end of which is fixedly connected to the connecting cylinder of the insulating box, and a blind plate is fixedly provided on the outer end of the insulating sleeve. The insulating sleeve contains a wall-penetrating sleeve, and an insulating partition for fixing the wall-penetrating sleeve is provided between the insulating sleeve and the connecting sleeve. The inner end of the insulating sleeve is connected to the cathode through a current-guiding copper rod, and the outer end of the insulating sleeve is connected to the connection end of the constant current source located in the distribution cabinet through an outgoing cable. The blind plate is provided with a second through hole for accommodating the outgoing cable. This device not only reduces the failure rate of the constant current source and ensures the long-term stable and effective operation of the environmental dust removal equipment, but also reduces investment costs. In actual use, traditional constant current sources have corresponding connecting cables on the output rectifier and filter module side for convenient current output. However, when the connecting cables are threaded through the constant current source housing, there is no corresponding cable fixing mechanism to fix the cable terminals. Furthermore, the output terminal positions are different for different models of constant current sources, which makes it impossible for the relatively simple cable fixing mechanism to adjust the fixing position in a timely and quick manner, affecting the stability of the connection and use of the connecting cables.

[0004] For example, when controlling and transmitting power to constant current sources with different power ratings, the position of the connection port on the constant current source side will change depending on the model and function. When using the cable fixing mechanism to connect and fix the cable connection port, the operator needs to use multiple sets of bolts to tighten and install the fixing mechanism, which makes it impossible to quickly disassemble and install the fixing mechanism, thus affecting the fixing and protection of the cable connection port. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a multifunctional high-frequency constant current source connection device. This device solves the technical problem that when connecting cables are threaded through the side of the constant current source housing, there is no corresponding cable fixing mechanism to fix the cable terminals. Furthermore, the output terminals of different constant current sources have different positions, which makes it impossible for the relatively simple cable fixing mechanism to adjust the fixing position in a timely and quick manner, thus affecting the stability of the connection and use of the connecting cables.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a multifunctional high-frequency constant current source connection device is designed, wherein a first mounting frame and a second mounting frame are movably sleeved on the outside of the cabinet, and a hollow frame is fixedly installed on the other side of the first mounting frame and the second mounting frame, and a first storage frame and a second storage frame are fixedly installed at both ends of the side of the hollow frame, and the first storage frame and the second storage frame are arranged diagonally outside the hollow frame.

[0007] Both the first and second mounting frames have slidably mounted transmission push plates on their sides. The first storage frame has a transmission mechanism inside, and the transmission mechanism is connected to the transmission push plate. The hollow frame has a conversion mechanism inside, and the second storage frame has a follow-up mechanism inside. The follow-up mechanism is connected to a telescopic mechanism on its side, and the telescopic mechanism is connected to a limit holder frame on its side.

[0008] Preferably, the conversion mechanism includes a transmission gear, and a rotating rod is rotatably mounted inside the hollow frame via a bearing at the middle end. A transmission gear is fixedly sleeved on the middle end surface of each rotating rod, and the transmission gear is rotatably mounted inside the hollow frame.

[0009] Preferably, the transmission mechanism includes a transmission rack, the transmission rack is slidably installed on the bottom inner side of the first storage frame, and the top and bottom of the transmission rack mesh with each other. A stop spring is provided on the side of the first storage frame away from the hollow frame, and the two ends of the stop spring are fixedly connected to the side end of the transmission rack and the inner side wall of the first storage frame, respectively.

[0010] Preferably, the follower mechanism includes a follower rack, the follower rack is slidably installed on the bottom inner side of the second storage frame, and the bottom of the follower rack meshes with the top of the transmission rack. A movable plate is slidably installed inside the second storage frame, and a push rod is fixedly installed at both ends of the side of each movable plate. The side of the push rod is slidably inserted into the inside of the second storage frame away from the hollow frame. A fixing block is fixedly installed between the top ends of the two sets of push rods.

[0011] Preferably, the telescopic mechanism includes a push spring, a hollow tube is fixedly installed at the middle of the side of each fixed block, an extrusion plate is slidably installed inside each hollow tube, a fixed rod is fixedly installed at the middle of the side of each extrusion plate, and the fixed rod is slidably installed inside the fixed block. The top of the side of the fixed rod is fixedly connected to the outer side of the limiting frame. An anti-slip friction pad is fixedly adhered to the side wall of the limiting frame. A push spring is movably sleeved inside the hollow tube, and the two ends of the push spring are respectively movably attached to the outer wall of the extrusion plate and the inner wall of the hollow tube.

[0012] Preferably, a connecting plate is slidably sleeved between the inner sides of the first mounting frame and the second mounting frame, and limit screw holes are provided on the sides of the first mounting frame, the second mounting frame and the connecting plate, and fixing bolts are screwed into the limit screw holes by threads.

[0013] Preferably, a fixing plate is fixedly installed at the bottom of the second mounting frame, and the bottom of the first mounting frame slides against the top surface of the fixing plate. The fixing plate has several sets of wire-passing grooves inside. A retaining arc plate is movably installed on the inner side wall of each wire-passing groove. The fixing plate also has movable grooves inside, and a transmission plate is slidably installed inside each movable groove. The side of the transmission plate is fixedly connected to the outer side of the retaining arc plate. A pushing plate is movably installed on the inner side of the movable groove, and its side is fixedly connected to the outer side of the transmission plate. A transmission rod is fixedly installed between every two sets of pushing plate sides, and the transmission rod is slidably installed inside the movable groove. An adjusting bolt is threaded through the middle of the side of the fixing plate, and the top of the adjusting bolt is rotatably installed inside the side of the pushing plate via a bearing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model features a movable first and second mounting frame on the outside of the cabinet, a transmission push plate on the side of the first and second mounting frames, and a transmission rack connected to the transmission push plate inside the first storage frame. When the operator needs to adjust the position of the fixed plate connecting the bottom of the first and second mounting frames, they only need to align the fixed plate and its internal cable groove with the outside of the wiring port on the outside of the cabinet. Continuously pushing the first and second mounting frames causes the transmission push plate to abut against the outer wall of the cabinet, causing it to move horizontally along the transmission rack. Combined with the meshing of the transmission gear and the follower rack, the follower rack moves outward synchronously, causing the limiting bracket on its side to move horizontally along the outer wall of the cabinet. After movement, the limiting bracket, pushed against the outer wall of the cabinet, moves the compression plate inside the hollow tube, compressing the push spring and giving it a restoring force. As the operator continues to push the first and second mounting frames, the limiting bracket moves synchronously away from the side edge of the cabinet. The push spring then automatically provides the limiting bracket with the corresponding restoring force, allowing it to engage with the outer wall of the cabinet. Combined with the pushing spring's action on the transmission push plate and the push spring's action on the limiting bracket, the transmission push plate and the limiting bracket can fully conform to different cabinet walls, enabling the installation of the fixing plate and cable management positions. This simplifies the operator's steps for adjusting the cable management positions, allowing the entire cable connection mechanism to be adjusted for different cabinet sizes.

[0016] 2. This utility model features multiple sets of cable-passing grooves inside the fixed plate, each with a retaining arc plate. A transmission rod connects adjacent sets of push plates, allowing the operator to tighten a single adjusting bolt after the cable passes through the groove and connects to the wiring port on the outer wall of the cabinet. This enables the multiple retaining arc plates to move synchronously within the groove, thus securing and fixing multiple sets of connecting cables. This simplifies the steps required for fixing current-carrying cables and improves the stability of current-carrying cable connections. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 2 This is a side view of the internal structure of the second mounting frame of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the fixing block of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the fixing plate of this utility model;

[0021] In the diagram: 1. Server rack; 11. First mounting frame; 12. Connecting plate; 13. Second mounting frame; 14. Fixing plate; 15. Cable tray;

[0022] 2. Hollow frame; 21. First storage frame; 22. Second storage frame; 23. Transmission push plate; 24. Rotating rod; 25. Transmission gear; 26. Transmission rack; 27. Follower rack; 28. Movable plate; 29. ​​Push rod;

[0023] 3. Abutting spring; 31. Fixing block; 32. Hollow tube; 33. Extrusion plate; 34. Fixing rod; 35. Limiting frame; 36. Push spring; 37. Anti-slip friction pad;

[0024] 4. Adjusting bolt; 41. Movable groove; 42. Push plate; 43. Transmission plate; 44. Transmission rod; 45. Clamping arc plate;

[0025] 5. Fixing bolts; 51. Limiting screw holes. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Example 1: A multifunctional high-frequency constant current source connection device, see [link to example]. Figures 1 to 4 The cabinet 1 contains an input module, a high-frequency inverter module, an output rectification and filtering module, and a control module.

[0028] The input module converts the external power input into voltage and current suitable for the operation of the high-frequency constant current source. The high-frequency inverter module can convert DC power into high-frequency AC power to provide high-frequency energy to the load. The output rectifier and filter module can convert high-frequency AC power into stable DC power to provide constant current to the load. The output rectifier and filter module can be connected through the connecting cable passing through the cable tray 15 to deliver stable DC power. The control module performs overall control of the high-frequency constant current source to achieve stable current output and regulation.

[0029] For details, see Figures 1 to 4The cabinet 1 is movably fitted with a first mounting frame 11 and a second mounting frame 13. A hollow frame 2 is fixedly installed on the other side of the first mounting frame 11 and the second mounting frame 13. A first storage frame 21 and a second storage frame 22 are fixedly installed at both ends of the side of the hollow frame 2, and the first storage frame 21 and the second storage frame 22 are arranged diagonally outside the hollow frame 2. A transmission push plate 23 is slidably installed on the side of the first mounting frame 11 and the second mounting frame 13. A connecting plate 12 is slidably fitted between the inside of the side of the first mounting frame 11 and the second mounting frame 13. Limiting screw holes 51 are opened on the side of the first mounting frame 11, the second mounting frame 13 and the connecting plate 12. The number of limiting screw holes 51 on the surface of the connecting plate 12 is several sets. A fixing bolt 5 is screwed into the inside of the limiting screw hole 51 by thread.

[0030] When it is necessary to fix the connecting cables at the wiring port on the outside of the constant current source cabinet 1, place the first mounting frame 11 and the second mounting frame 13 together with the transmission push plate 23 close to the outer wall of the cabinet 1. Simply align the fixing plate 14 and its internal cable groove 15 with the outside of the wiring port on the outside of the cabinet 1, and then tighten the fixing bolts 5 to remove them from the limiting screw holes 51 inside the first mounting frame 11, the second mounting frame 13 and the connecting plate 12. Then, proceed with the installation of the first mounting frame 11 and the second mounting frame 13. Pull it to move it horizontally on the outer wall of the connecting plate 12. Adjust the overall length of the first mounting frame 11, the second mounting frame 13 and the connecting plate 12 to fit the outer wall of the cabinet 1 of the corresponding model and size. After screwing the fixing bolts 5 into the corresponding limit screw holes 51, install and fix the first mounting frame 11, the second mounting frame 13 and the connecting plate 12 to ensure that the outer wall of the cabinet 1 can abut against the side of the limit card frame 35 so that its side is close to the outer wall of the fixing block 31 for subsequent installation and use.

[0031] Further, see Figures 1 to 4 A transmission rack 26 is slidably installed on the bottom inner side of the first storage frame 21, and the side end of the transmission rack 26 passes through the side end of the first storage frame 21 and is slidably installed on the bottom inner side of the hollow frame 2. The top and bottom of the transmission rack 26 mesh with each other. A follower rack 27 is slidably installed on the bottom inner side of the second storage frame 22, and the side end of the follower rack 27 passes through the side end of the second storage frame 22 and is slidably installed on the top inner side of the hollow frame 2. The bottom of the follower rack 27 meshes with the top of the transmission rack 26. A movable plate 28 is slidably installed inside the second storage frame 22. A push rod 29 is fixedly installed at both ends of the side of each movable plate 28, and the side of the push rod 29 passes through and is slidably inserted into the inside of the second storage frame 22 away from the hollow frame 2. A fixing block 31 is fixedly installed between the top ends of the two sets of push rods 29.

[0032] For example, when it is necessary to fix the cables used for connection at the back end of the cabinet 1, and the fixing plate 14 needs to be adjusted and installed according to the position of the wiring terminal on the outer wall of the cabinet 1, the operator only needs to push the first mounting frame 11 and the second mounting frame 13 to drive the limit card frame 35 to adjust the suitability of the snap-fit ​​position. In the traditional solution, the operator needs to select a matching fixing bracket according to the size of the cabinet 1 itself, and then use multiple sets of bolts to install it on the outside of the cabinet 1 from multiple directions to achieve the fixing of the cables. This installation method has poor applicability of the fixing bracket itself, and when it is necessary to disassemble and adjust the fixing bracket, it is still necessary to loosen and disassemble a large number of bolts, which is time-consuming and laborious. It is very easy to affect the stability of the cable connection and fixing due to the unsuitable size of the fixing bracket.

[0033] In the specific application of this solution, after continuously pushing the first mounting frame 11 and the second mounting frame 13, the transmission push plate 23 is pushed against the outer wall of the cabinet 1, causing the transmission rack 26 to move horizontally to the left in sync. Then, in conjunction with the transmission gear 25, the transmission rack 26 and the follower rack 27 are meshed, which can drive the follower rack 27 to move horizontally to the right in sync. This can drive the limit bracket 35 on its side to move horizontally along the outer wall of the cabinet 1 in sync, thereby quickly adjusting the snap-fit ​​position of the limit bracket 35 so that it can be snap-fitted and installed on cabinets 1 of different sizes and models.

[0034] It is worth noting that, see Figures 1 to 4 Each of the first storage frames 21 has a retaining spring 3 on the side away from the hollow frame 2. The two ends of the retaining spring 3 are fixedly connected to the side end of the transmission rack 26 and the inner wall of the first storage frame 21, respectively. A hollow tube 32 is fixedly installed at the middle of the side of each fixing block 31. An extrusion plate 33 is slidably installed inside each hollow tube 32. A fixing rod 34 is fixedly installed at the middle of the side of each extrusion plate 33. The fixing rod 34 is slidably installed inside the fixing block 31. The top of the side of the fixing rod 34 is fixedly connected to the outside of the limiting frame 35. An anti-slip friction pad 37 is fixedly adhered to the side wall of the limiting frame 35. A push spring 36 is movably sleeved inside the hollow tube 32. The two ends of the push spring 36 are movably attached to the outer wall of the extrusion plate 33 and the inner wall of the hollow tube 32, respectively.

[0035] The abutment action of the outer wall of the cabinet 1 against the limiting frame 35 causes the compression plate 33 to move within the hollow tube 32, compressing the push spring 36 and giving it a restoring force. As the operator continues to push the first mounting frame 11 and the second mounting frame 13, the limiting frame 35 can move synchronously away from the side edge of the cabinet 1. The push spring 36 then automatically provides the limiting frame 35 with a corresponding restoring force, which in turn provides the compression plate 33 with a corresponding force. As the compression plate 33 moves back within the hollow tube 32, it causes the limiting frame 35 to move horizontally synchronously, allowing the side of the limiting frame 35 to engage. The mounting plate 14 is attached to the outer wall of the cabinet 1. Combined with the reverse abutment action of the abutment spring 3 on the transmission push plate 23 and the pushing action of the push spring 36 on the limit frame 35, the transmission push plate 23 and the limit frame 35 can be fully attached to the outer wall of the cabinet 1, and the fixing plate 14 is stably installed on the outside of the wiring port. When the position of the whole mechanism needs to be adjusted, the limit frame 35 can be pushed to move it away from the outer wall of the cabinet 1. Then, under the restoring push action of the abutment spring 3, the first mounting frame 11 and the second mounting frame 13 can be pushed by the transmission push plate 23 and automatically moved away from the outer wall of the cabinet 1. The above steps are repeated to readjust and reinstall the position of the whole mechanism.

[0036] A fixing plate 14 is fixedly installed at the bottom of the second mounting frame 13, and the bottom of the first mounting frame 11 slides against the top surface of the fixing plate 14. The fixing plate 14 has a wire-passing groove 15 inside, and there are several sets of wire-passing grooves 15. A clamping arc plate 45 is movably installed on the inner side wall of each wire-passing groove 15. The fixing plate 14 has a movable groove 41 inside, and a transmission plate 43 is slidably installed inside each movable groove 41. The side of the transmission plate 43 is fixedly connected to the outside of the clamping arc plate 45. A push plate 42 is movably installed on the side inside the movable groove 41. The side of the push plate 42 is fixedly connected to the outside of the transmission plate 43. A transmission rod 44 is fixedly installed between every two sets of push plates 42. The transmission rod 44 is slidably installed inside the movable groove 41. An adjusting bolt 4 is threaded through and screwed to the middle of the side of the fixing plate 14. The top of the side of the adjusting bolt 4 is rotatably installed inside the side of the push plate 42 through a bearing.

[0037] For example, when connecting the connecting cable to the wiring port on the outer wall of the cabinet 1, the connecting cable can be stopped and limited by the abutment plate 45 to prevent it from shaking arbitrarily after connection and affecting the stability of current transmission. In traditional use, when fixing the cable, the operator needs to perform the fixing operation step by step according to the different number of cables. It is not possible to fix a large number of cables at the same time, which makes the operation steps required for fixing the cable more cumbersome and affects the overall efficiency of the constant current source cabinet 1.

[0038] In the specific application of this solution, after the connecting cable to be connected is passed through the inside of the cable tray 15 and connected to the wiring port, the adjusting bolt 4 is tightened, which can drive the push plate 42 to move horizontally in the movable slot 41. Subsequently, under the transmission action of the transmission rod 44, multiple sets of transmission plates 43 can move horizontally in the movable slot 41, which in turn can drive multiple sets of pressing arc plates 45 to move horizontally in the cable tray 15. This allows the pressing arc plates 45 to fully fit against the outer wall of the connecting cable, thereby limiting and fixing the connecting cable.

[0039] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0040] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A multifunctional high-frequency constant current source connection device comprising a cabinet (1), characterized in that, The first mounting frame (11) and the second mounting frame (13) are slidably connected with the transmission push plate (23), the first storage frame (21) is internally provided with a transmission mechanism, and the transmission mechanism and the transmission push plate (23) are transmissionally connected, the hollow frame (2) is internally provided with a conversion mechanism, the second storage frame (22) is internally provided with a follow-up mechanism, the follow-up mechanism is transmissionally connected with the telescopic mechanism on the side, and the telescopic mechanism is transmissionally connected with the limiting clamping frame (35) on the side. The conversion mechanism comprises a transmission gear (25), each hollow frame (2) is internally rotatably connected with a rotating rod (24) through a bearing, each rotating rod (24) is fixedly connected with a transmission gear (25) on the surface of the middle end, and the transmission gear (25) is rotatably installed in the hollow frame (2).

2. The multi-functional high-frequency constant-current source connection device according to claim 1, wherein The transmission mechanism comprises a transmission rack (26), the first storage frame (21) is slidably connected with the transmission rack (26) on the inner bottom, the top of the transmission rack (26) is engaged with the bottom of the transmission rack (26), one side of the first storage frame (21) away from the hollow frame (2) is provided with a resisting spring (3), and the two ends of the resisting spring (3) are fixedly connected with the side end of the transmission rack (26) and the inner side wall of the first storage frame (21).

3. The multi-functional high-frequency constant-current source connecting device according to claim 2, wherein The follow-up mechanism comprises a follow-up rack (27), the second storage frame (22) is slidably connected with the follow-up rack (27) on the inner bottom, the bottom of the follow-up rack (27) is engaged with the top of the transmission rack (26), the second storage frame (22) is slidably connected with the movable plate (28) inside, each movable plate (28) is fixedly connected with the push rod (29) on the two ends of the side, the push rod (29) is slidably inserted into the inner side of the second storage frame (22) away from the hollow frame (2), and the two groups of push rods (29) are fixedly connected with the fixed block (31) between the top ends of the sides.

4. The multi-functional high-frequency constant current source connection device according to claim 2, wherein The conversion mechanism comprises a transmission gear (25), each hollow frame (2) is internally rotatably connected with a rotating rod (24) through a bearing, each rotating rod (24) is fixedly connected with a transmission gear (25) on the surface of the middle end, and the transmission gear (25) is rotatably installed in the hollow frame (2).

5. The multi-functional high-frequency constant current source connection device according to claim 4, wherein Said telescopic mechanism includes push spring (36), each of the fixed block (31) side edge middle end is fixedly installed with hollow tube (32), each of the hollow tube (32) inside is slidably installed with extrusion plate (33), each of the extrusion plate (33) side edge middle end is fixedly installed with fixed rod (34), and fixed rod (34) penetrates and is slidably installed in fixed block (31) inside, the fixed rod (34) side edge top end and limit card frame (35) outside fixedly connected, the limit card frame (35) side wall fixedly bonded with antiskid friction pad (37), the hollow tube (32) inside movable sleeve joint has push spring (36), and push spring (36) side edge both ends are respectively movable and fit in extrusion plate (33) outer wall and hollow tube (32) inner wall.

6. The multi-functional high-frequency constant current source connection device according to claim 1, wherein The first mounting frame (11) and the second mounting frame (13) are slidably connected between the side edges of the first mounting frame (11) and the second mounting frame (13). The first mounting frame (11), the second mounting frame (13) and the connecting plate (12) are provided with limiting screw holes (51) on the side edges. The limiting screw holes (51) are screwed with fixed bolts (5) through threads.

7. The multi-functional high-frequency constant current source connection device according to claim 1, wherein The second mounting frame (13) is fixedly installed with a fixed plate (14) at the bottom, and the first mounting frame (11) is slidably attached to the top surface of the fixed plate (14). The fixed plate (14) is provided with wire grooves (15) inside, and the number of wire grooves (15) is several groups. Each of the wire grooves (15) is movably installed with a tight arc plate (45) on the inner side wall. The fixed plate (14) is provided with an activity slot (41) inside. Each of the activity slots (41) is slidably installed with a transmission plate (43) inside, and the side edge of the transmission plate (43) is fixedly connected with the outer side of the tight arc plate (45). The activity slot (41) is movably installed with a push plate (42) on the side edge, and the side edge of the push plate (42) is fixedly connected with the outer side of the transmission plate (43). Each two groups of push plates (42) are fixedly installed with a transmission rod (44) between the side edges, and the transmission rod (44) is slidably installed in the activity slot (41). The fixed plate (14) is screwed with an adjusting bolt (4) through threads at the middle end of the side edge, and the side edge top end of the adjusting bolt (4) is rotatably installed in the side edge of the push plate (42) through a bearing.

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