Harmonica tube type water-cooled plate brazing tooling

Abstract

The application discloses a harmonica tube type water-cooled plate brazing tool, which comprises a supporting seat, a flow channel fixing mechanism and a lifting mechanism are arranged on the top of the supporting seat, current collector fixing mechanisms are arranged on the two sides of the supporting seat, a connecting mechanism is arranged between the supporting seat and the current collector fixing mechanisms, and water-cooled plates are installed on the flow channel fixing mechanism and the current collector fixing mechanism, and the application belongs to the technical field of new energy heat system production. The harmonica tube type water-cooled plate brazing tool has the advantages that a plurality of flow channels are respectively placed in the limiting grooves on the fixed base, then the driving motor drives the two pressing plates to simultaneously move downward along the inclined guide rails and approach each other to be spliced and combined, when the combination is completed, the electric push rod covers the first pressing plate and the second pressing plate on the fixed base, the limiting clamping blocks are embedded on the flow channels, the plurality of flow channels of the water-cooled plate are fixed, the stability of the flow channels is improved, deviation in the welding process is avoided, and therefore the welding effect can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of new energy thermal system production technology, specifically to a brazing fixture for harmonica tube-type water-cooled plates. Background Technology

[0002] The new energy thermal system is an intelligent constant-temperature thermal management system that can simultaneously achieve coordinated cooling and heating of battery packs, motors, and electronic control components in electric vehicles. It consists of heat exchange units such as liquid cooling plates, plate heat exchangers, and radiators, power components such as water pumps and compressors, and intelligent control modules. Through the implementation of key technologies such as functional coordination and integration optimization of important components, orderly heat transfer and utilization of the system, development of new high-efficiency stamped liquid cooling plates, integration of low-conductivity and high-thermal-conductivity phase change materials, and development of intelligent control units for power components, a major breakthrough has been achieved in the integrated and intelligent development of electric vehicle thermal management systems. This has realized the advanced technology of coupling high-efficiency liquid cooling and phase change heat transfer, thereby ensuring that the battery module is always within the optimal operating temperature range of 25-35℃. The liquid cooling plate, namely the harmonica tube-type water cooling plate, is made by extruding aluminum to create flow channels, which are then welded to the current collectors at both ends. In the existing technology, it is inconvenient to fix multiple flow channels and current collectors simultaneously when welding them, resulting in insufficient stability of the flow channels and easy displacement during the welding process, thus making the welding effect less than ideal. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a harmonica tube-type brazing fixture for water-cooled plates, which solves the problem of inconvenience in simultaneously fixing multiple flow channels and current collectors, resulting in insufficient stability of the flow channels, easy displacement during the welding process, and thus unsatisfactory welding results.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a harmonica tube type water-cooled plate brazing fixture, including a support base, the top of the support base is provided with a flow channel fixing mechanism and a lifting mechanism, both sides of the support base are provided with a collector fixing mechanism, a connecting mechanism is provided between the support base and the collector fixing mechanism, and a water-cooled plate is installed on the flow channel fixing mechanism and the collector fixing mechanism;

[0007] The flow channel fixing mechanism includes multiple fixed bases, each fixed base having a limit groove inside. A first pressure plate and a second pressure plate are provided on the top of each fixed base. A limit block is fixedly connected to one bottom end of each of the first and second pressure plates. A combination insertion hole is provided on one side of the first pressure plate, and a combination insertion rod is fixedly connected to one side of the second pressure plate. An inclined guide rail is provided on one side of each of the first and second pressure plates. A guide groove is provided inside the inclined guide rail, and a guide slider is slidably connected inside the guide groove. Multiple balls are provided on the guide slider, which is slidably connected to the guide groove via the balls. A rotating seat is fixedly connected to the guide slider, and a rotating block is rotatably connected inside the rotating seat. The first and second pressure plates are respectively fixedly connected to two rotating blocks. Traction ropes are fixedly connected to the top and bottom ends of the guide slider. A rotating wheel is fixedly connected to the traction rope, and a worm gear is fixedly connected to the end of the rotating wheel. A worm is provided on one side of the worm gear, and a drive motor is fixedly connected to the end of the worm gear. A movable pressure block is also fixedly connected to the traction rope, and a start switch is provided at the bottom of the movable pressure block. The start switch is fixedly installed inside the inclined guide rail.

[0008] The lifting mechanism includes multiple pairs of guide seats, which are fixedly installed on the support base. Each pair of two guide seats is symmetrically arranged on both sides of the fixed base. An electric push rod is fixedly connected inside the guide seat. A guide plate is fixedly connected to the top of the output shaft of the electric push rod. Two connecting rods are fixedly connected to the top of the guide plate. The connecting rods are fixedly connected to the inclined guide rail.

[0009] Preferably, multiple fixed bases are evenly arranged on the top surface of the support base, and the fixed bases are detachably connected to the support base, so that multiple flow channels of the water-cooled plate can be fixed, and the fixed bases can be easily inspected and replaced.

[0010] Preferably, a stop block is fixedly connected to the bottom of the rotating seat, the rotating block is disposed on the top of the stop block, and the rotating block is in contact with the stop block, so that the rotating block can rotate, and the stop block can limit the rotation of the rotating block.

[0011] Preferably, the two limiting blocks are disposed at opposite ends of the first pressure plate and the second pressure plate, and the combined insert rod matches the combined insert hole, so that after the first pressure plate and the second pressure plate are combined, the two limiting blocks can be spliced ​​together, which is convenient to be embedded into the flow channel of the water-cooled plate for fixation.

[0012] Preferably, the inclined guide rail is rotatably connected to a guide pulley, and the traction rope is mounted on the guide pulley, so that the guide pulley can guide the traction rope, thereby enabling the traction rope to drive the guide slider to move.

[0013] Preferably, the worm gear meshes with the worm, and the output shaft of the drive motor is connected to the rotating wheel via the worm gear and the worm, so that the drive motor can drive the rotating wheel to rotate.

[0014] Preferably, the connecting mechanism includes a connecting seat and a connecting socket. The connecting seat has a connecting slot, and the connecting socket has multiple grooves. A locking block is slidably connected inside the groove. A square internal threaded sleeve is fixedly connected to the end of the locking block. A locking screw is threadedly connected inside the square internal threaded sleeve. The locking screw is rotatably connected to the inside of the connecting socket. The ends of the multiple locking screws are connected to a connecting shaft through a bevel gear pair. A knob is fixedly connected to the end of the connecting shaft, which allows for easy replacement of the support seat, thereby adapting to water-cooled plates of different specifications.

[0015] Preferably, the current collector fixing mechanism includes a fixed base, a fixed block fixedly connected to the fixed base, a sliding groove provided on the fixed base, a guide rod fixedly connected inside the sliding groove, a guide frame slidably connected to the guide rod, a movable block fixedly connected to the top of the guide frame, and a cylinder fixedly connected to the end of the guide frame. The cylinder is fixedly installed on the fixed base, which facilitates the fixing of the current collector of the water-cooled plate.

[0016] This invention provides a brazing fixture for a harmonica-tube type water-cooled plate. Compared with the prior art, it has the following advantages:

[0017] (1) The harmonica tube type water-cooled plate brazing fixture places multiple flow channels inside the limiting groove on the fixed base, and then drives the motor to move two pressure plates down along the inclined guide rail at the same time and bring them close together to splice and combine. When the combination is completed, the electric push rod covers the first pressure plate and the second pressure plate on the fixed base, so that the limiting block is embedded in the flow channel, fixing the multiple flow channels of the water-cooled plate, improving the stability of the flow channel, avoiding displacement during the welding process, and thus effectively improving the welding effect.

[0018] (2) The harmonica tube type water-cooled plate brazing fixture can be used to insert the connecting socket into the connecting seat, and then turn the knob. The knob turns and drives the connecting shaft to rotate. The rotating connecting shaft drives multiple locking screws to rotate. The rotating locking screws drive the square internal thread sleeve to move along the inner wall of the connecting socket and insert the locking block into the connecting slot. This allows for easy replacement of the support seat, thus adapting to water-cooled plates of different specifications.

[0019] (3) The harmonica tube type water-cooled plate brazing fixture uses a cylinder to drive the guide frame to move, and the movement of the guide frame drives the movement of the movable block. The movable block, together with the fixed block, facilitates the fixing of the water-cooled plate's collector, thereby improving the stability during the welding process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the flow channel fixing mechanism and lifting mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection structure between the rotating base and the drive motor of the present invention;

[0023] Figure 4 This is a schematic diagram of the first and second pressure plates of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection mechanism structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the current collector fixing mechanism of the present invention.

[0026] In the diagram: 1. Support base; 2. Flow channel fixing mechanism; 201. Fixed base; 202. Limiting groove; 203. First pressure plate; 204. Second pressure plate; 205. Limiting block; 206. Combination insertion hole; 207. Combination insertion rod; 208. Inclined guide rail; 209. Guide groove; 210. Guide slider; 211. Ball bearing; 212. Rotating seat; 213. Rotating block; 214. Traction rope; 215. Rotating wheel; 216. Worm gear; 217. Worm; 218. Drive motor; 219. Movable pressure block; 220. Start switch; 3. Lifting mechanism Mechanism; 301, guide seat; 302, electric push rod; 303, guide plate; 304, connecting rod; 4, water-cooled plate; 5, connecting mechanism; 501, connecting seat; 502, connecting socket; 503, connecting slot; 504, groove; 505, locking block; 506, square internal thread sleeve; 507, locking screw; 508, connecting shaft; 509, knob; 6, manifold fixing mechanism; 601, fixing seat; 602, slide groove; 603, guide rod; 604, fixing block; 605, guide frame; 606, movable block; 607, cylinder. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-4This invention provides a technical solution: a harmonica tube type water-cooled plate brazing fixture, including a support base 1, a flow channel fixing mechanism 2 and a lifting mechanism 3 on the top of the support base 1, and a collector fixing mechanism 6 on both sides of the support base 1. A connecting mechanism 5 is provided between the support base 1 and the collector fixing mechanism 6. A water-cooled plate 4 is installed on the flow channel fixing mechanism 2 and the collector fixing mechanism 6. The collector of the water-cooled plate 4 can be fixed by the collector fixing mechanism 6. Then, the flow channel fixing mechanism 2 and the lifting mechanism 3 are used to fix multiple flow channels of the water-cooled plate 4, thereby improving the stability of the flow channels and avoiding displacement during the welding process, thus effectively improving the welding effect.

[0029] The flow channel fixing mechanism 2 includes multiple fixing bases 201, which are evenly arranged on the top surface of the support base 1. The fixing bases 201 are detachably connected to the support base 1, allowing for the fixing of multiple flow channels of the water-cooled plate 4 and facilitating maintenance and replacement of the fixing bases 201. Each fixing base 201 has a limiting groove 202 inside, which matches the flow channel of the water-cooled plate 4, allowing the flow channel to enter the limiting groove 202. This, in conjunction with the first pressure plate 203 and the second pressure plate 204, fixes the flow channel. The top of the fixing base 201 is provided with the first pressure plate 203 and the second pressure plate 204, and each of the first pressure plate 203 and the second pressure plate 204 has a limiting block 205 fixedly connected to one end of its bottom. The first pressure plate 203 has a combination insertion hole 206 on one side surface, and a combination insertion rod 207 is fixedly connected to one side surface of the second pressure plate 204, so that the combination insertion rod 207 is inserted into the combination insertion hole 206, allowing the first pressure plate 203 and the second pressure plate 204 to be combined and spliced ​​into a whole pressure plate. Two limiting blocks 205 are set at the opposite ends of the first pressure plate 203 and the second pressure plate 204, and the combination insertion rod 207 matches the combination insertion hole 206, so that after the first pressure plate 203 and the second pressure plate 204 are combined, the two limiting blocks 205 can be spliced ​​together, which is convenient for embedding into the flow channel of the water-cooled plate 4 for fixation. Both the first pressure plate 203 and the second pressure plate 204 have inclined guide rails 208 on one side, and the inclined guide rails 208 have guides inside. The guide groove 209 has a guide slider 210 slidably connected inside it. The guide slider 210 has multiple balls 211, and is slidably connected to the guide groove 209 via the balls 211, guiding its movement. A rotating seat 212 is fixedly connected to the guide slider 210, and a rotating block 213 is rotatably connected inside the rotating seat 212. A stop is fixedly connected to the bottom of the rotating seat 212, and the rotating block 213 is positioned on top of the stop and contacts the stop, allowing the rotating block 213 to rotate. The stop also limits the rotation of the rotating block 213. A first pressure plate 203 and a second pressure plate 204 are fixedly connected to two rotating blocks 213 respectively. A traction rope 214 is fixedly connected to the top and bottom ends of the slider 210. A rotating wheel 215 is fixedly connected to the traction rope 214. A worm gear 216 is fixedly connected to the end of the rotating wheel 215. A worm 217 is provided on one side of the worm gear 216. A drive motor 218 is fixedly connected to the end of the worm 217. The worm gear 216 meshes with the worm 217. The output shaft of the drive motor 218 is connected to the rotating wheel 215 through the worm gear 216 and the worm 217, so that the drive motor 218 can drive the rotating wheel 215 to rotate. The self-locking function of the worm 217 and the worm gear 216 can lock the rotating wheel 215. A movable pressure block 219 is also fixedly connected to the traction rope 214. A start switch 220 is provided at the bottom of the movable pressure block 219.The start switch 220 is fixedly installed inside the inclined guide rail 208. The start switch 220 is connected to the electric push rod 302, so that when the start switch 220 is pressed, it can drive the electric push rod 302 to retract, causing the inclined guide rail 208 to move downwards. A guide pulley is rotatably connected inside the inclined guide rail 208, and a traction rope 214 is mounted on the guide pulley. The guide pulley guides the traction rope 214, allowing the traction rope 214 to drive the guide slider 210 to move.

[0030] The lifting mechanism 3 includes multiple pairs of guide seats 301, which are fixedly installed on the support base 1. Each pair of two guide seats 301 are symmetrically arranged on both sides of the fixed base 201. An electric push rod 302 is fixedly connected inside the guide seat 301. A guide plate 303 is fixedly connected to the top of the output shaft of the electric push rod 302. Two connecting rods 304 are fixedly connected to the top of the guide plate 303. The connecting rods 304 are fixedly connected to the inclined guide rail 208, so that the electric push rod 302 can drive the inclined guide rail 208 to lift and lower. This allows the first pressure plate 203 and the second pressure plate 204 to be placed on the top of the fixed base 201, which can effectively fix the flow channel.

[0031] Please see Figure 1 and Figure 5 The connecting mechanism 5 includes a connecting seat 501 and a connecting socket 502. The connecting socket 502 is fixed on the support seat 1, and the connecting seat 501 is fixed on the fixing seat 601. The connecting seat 501 has a connecting slot 503, and the connecting socket 502 has multiple grooves 504. A locking block 505 is slidably connected inside the groove 504. A square internal threaded sleeve 506 is fixedly connected to the end of the locking block 505. A locking screw 507 is threaded inside the square internal threaded sleeve 506. The locking screw 507 is rotatably connected to the inside of the connecting socket 502. The ends of the multiple locking screws 507 are connected through... The bevel gear pair is connected to a connecting shaft 508, and a knob 509 is fixedly connected to the end of the connecting shaft 508. By inserting the connecting socket 502 into the connecting base 501 and then rotating the knob 509, the rotation of the knob 509 drives the connecting shaft 508 to rotate. The rotation of the connecting shaft 508 drives multiple locking screws 507 to rotate. The rotation of the locking screws 507 drives the square internal thread sleeve 506 to move along the inner wall of the connecting socket 502, and inserts the locking block 505 into the connecting slot 503. This allows for easy replacement of the support base 1, thus accommodating water-cooled plates 4 of different specifications.

[0032] Please see Figure 1 and Figure 6The current collector fixing mechanism 6 includes a fixed base 601, a fixed block 604 fixedly connected to the fixed base 601, a sliding groove 602 opened on the fixed base 601, a guide rod 603 fixedly connected inside the sliding groove 602, a guide frame 605 slidably connected to the guide rod 603, a movable block 606 fixedly connected to the top of the guide frame 605, and a cylinder 607 fixedly connected to the end of the guide frame 605. The cylinder 607 is fixedly installed on the fixed base 601 and can drive the guide frame 605 to move. The movement of the guide frame 605 drives the movable block 606 to move. The movable block 606, together with the fixed block 604, facilitates the fixing of the current collector of the water-cooled plate 4, improving the stability during the welding process.

[0033] In use, multiple flow channels are placed inside the limiting grooves 202 on the fixed base 201. Then, the drive motor 218 drives the worm gear 217 to rotate. The rotation of the worm gear 217 drives the worm wheel 216 to rotate. The rotation of the worm wheel 216 drives the rotating wheel 215 to rotate. The rotation of the rotating wheel 215 drives the traction rope 214 to move. The movement of the traction rope 214 drives the guide slider 210 to move down along the inclined guide rail 208. The movement of the guide slider 210 drives the first pressure plate 203 and the second pressure plate 204 to move down along the inclined guide rail 208 simultaneously and move closer to each other. This is achieved through the combination insertion rod 207 and the combination insertion hole. 206 is assembled. When the assembly is complete, the movable pressure block 219 presses down the start switch 220 under the action of the traction rope 214. The electric push rod 302 drives the guide plate 303 to move. The movement of the guide plate 303 drives the connecting rod 304 to move. The movement of the connecting rod 304 drives the inclined guide rail 208 to move down, covering the first pressure plate 203 and the second pressure plate 204 on the fixed base 201. This allows the limit block 205 to be embedded in the flow channel, fixing the multiple flow channels of the water-cooled plate 4, improving the stability of the flow channel, and preventing displacement during the welding process, thereby effectively improving the welding effect.

[0034] The current collector is placed on the fixed base 601. The cylinder 607 drives the guide frame 605 to move. The movement of the guide frame 605 drives the movable block 606 to move. The movable block 606, together with the fixed block 604, facilitates the fixing of the current collector of the water-cooled plate 4, thereby improving the stability during the welding process.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A brazing fixture for a harmonica-tube type water-cooled plate, comprising a support base (1), characterized in that: The support base (1) is provided with a flow channel fixing mechanism (2) and a lifting mechanism (3) at the top. The support base (1) is provided with a collector fixing mechanism (6) on both sides. A connecting mechanism (5) is provided between the support base (1) and the collector fixing mechanism (6). A water-cooling plate (4) is installed on the flow channel fixing mechanism (2) and the collector fixing mechanism (6). The flow channel fixing mechanism (2) includes multiple fixed bases (201), each fixed base (201) having a limiting groove (202) inside. The top of the fixed base (201) is provided with a first pressure plate (203) and a second pressure plate (204). The bottom end of the first pressure plate (203) and the second pressure plate (204) are fixedly connected to a limiting block (205). A combination insertion hole (206) is provided on one side surface of the first pressure plate (203), and a combination insertion rod (207) is fixedly connected on one side surface of the second pressure plate (204). An inclined guide rail (208) is provided on one side of the first pressure plate (203) and the second pressure plate (204). A guide groove (209) is provided inside the inclined guide rail (208), and a guide slider (210) is slidably connected inside the guide groove (209). The guide slider (210) is provided with multiple A ball bearing (211) is used to guide the slider (210) to slide through the ball bearing (211) and guide groove (209). A rotating seat (212) is fixedly connected to the guide slider (210). A rotating block (213) is rotatably connected inside the rotating seat (212). The first pressure plate (203) and the second pressure plate (204) are fixedly connected to the two rotating blocks (213) respectively. A traction rope (214) is fixedly connected to the top and bottom ends of the guide slider (210). A rotating wheel (215) is fixedly connected to the traction rope (214). A worm gear (216) is fixedly connected to the end of the rotating wheel (215). A worm (217) is provided on one side of the worm gear (216). A drive motor (218) is fixedly connected to the end of the worm (217). A movable pressure block (219) is also fixedly connected to the traction rope (214). The lifting mechanism (3) includes multiple pairs of guide seats (301). The guide seats (301) are fixedly installed on the support base (1). Each pair of two guide seats (301) are symmetrically arranged on both sides of the fixed base (201). An electric push rod (302) is fixedly connected inside the guide seat (301). A guide plate (303) is fixedly connected to the top of the output shaft of the electric push rod (302). Two connecting rods (304) are fixedly connected to the top of the guide plate (303). The connecting rods (304) are fixedly connected to the inclined guide rail (208). The movable pressure block (219) is provided with a start switch (220) at the bottom. The start switch (220) is fixedly installed inside the inclined guide rail (208). The start switch (220) is connected to the electric push rod (302) in the lifting mechanism (3). When the start switch (220) is pressed, it can drive the electric push rod (302) to retract.

2. The brazing fixture for the harmonica tube type water-cooled plate according to claim 1, characterized in that: Multiple fixed bases (201) are evenly arranged on the top surface of the support base (1), and the fixed bases (201) are detachably connected to the support base (1).

3. The brazing fixture for the harmonica tube type water-cooled plate according to claim 1, characterized in that: The bottom of the rotating seat (212) is fixedly connected to a stop block, and the rotating block (213) is set on the top of the stop block and the rotating block (213) is in contact with the stop block.

4. The brazing fixture for the harmonica tube type water-cooled plate according to claim 1, characterized in that: The two limiting blocks (205) are located at opposite ends of the first pressure plate (203) and the second pressure plate (204), and the combined insertion rod (207) matches the combined insertion hole (206).

5. The brazing fixture for the harmonica tube type water-cooled plate according to claim 1, characterized in that: The inclined guide rail (208) is rotatably connected to a guide pulley, and the traction rope (214) is set on the guide pulley.

6. The brazing fixture for the harmonica tube type water-cooled plate according to claim 1, characterized in that: The worm wheel (216) meshes with the worm (217), and the output shaft of the drive motor (218) is connected to the rotating wheel (215) through the worm wheel (216) and the worm (217).

7. The brazing fixture for the harmonica tube type water-cooled plate according to claim 1, characterized in that: The connecting mechanism (5) includes a connecting seat (501) and a connecting socket (502). The connecting seat (501) has a connecting slot (503), and the connecting socket (502) has a plurality of grooves (504). A locking block (505) is slidably connected inside the groove (504). A square internal thread sleeve (506) is fixedly connected to the end of the locking block (505), and a locking screw (507) is threaded inside the square internal thread sleeve (506).

8. The brazing fixture for a harmonica-tube type water-cooled plate according to claim 7, characterized in that: The locking screw (507) is rotatably connected to the inside of the connecting socket (502), and the ends of the multiple locking screws (507) are connected to the connecting shaft (508) through a bevel gear pair. The end of the connecting shaft (508) is fixedly connected to a knob (509).

9. The brazing fixture for a harmonica-tube type water-cooled plate according to claim 1, characterized in that: The current collector fixing mechanism (6) includes a fixing seat (601), a fixing block (604) is fixedly connected to the fixing seat (601), a sliding groove (602) is provided on the fixing seat (601), a guide rod (603) is fixedly connected inside the sliding groove (602), a guide frame (605) is slidably connected to the guide rod (603), and a movable block (606) is fixedly connected to the top of the guide frame (605).

10. The brazing fixture for a harmonica-tube type water-cooled plate according to claim 9, characterized in that: A cylinder (607) is fixedly connected to the end of the guide frame (605), and the cylinder (607) is fixedly mounted on the fixed seat (601).

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