A large hydraulic press frame assembly positioning device

Abstract

The present invention discloses a large hydraulic press frame assembly and positioning device, which relates to the technical field of hydraulic press assembly, comprising a base, a base disc is rotatably mounted on the base, a plurality of base hydraulic cylinders are also fixedly mounted on the base disc, a main body seat is fixedly mounted on the other end of the base hydraulic cylinder, an inner hole positioning module is fixedly mounted on the main body seat, the inner hole positioning module comprises a contact hydraulic cylinder, a main cylinder body is fixedly mounted on one end of the contact hydraulic cylinder, an extrusion column is slidably mounted on the main cylinder body, a support seat is fixedly mounted on the extrusion column, a top cover seat is fixedly mounted on the support seat, a plurality of center slide bars are slidably mounted on the top cover seat, and the device centers the beam mounting hole by arranging the extrusion of the center slide bar, and drives the extrusion column to squeeze the hydraulic oil in the main cylinder body to complete the calibration of the column and the mounting hole.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic press assembly, and in particular to a large hydraulic press frame assembly positioning device. Background Art

[0002] During the frame assembly process of a large hydraulic press, the existing installation method is to use multiple cranes to cooperate with manual labor for assembly and debugging. At the same time, with the assistance of manual labor, the columns are passed through the upper beam and the lower beam respectively. Since the outer surface of the column has a hard chrome plating layer, during the installation process, care must be taken to protect the column from touching external hard parts, and try to avoid the hard chrome plating layer on the surface of the column from being damaged. Therefore, before this installation process, the column and the installation holes on the upper beam and the lower beam must be positioned and centered to ensure that the column holes will not be bumped or scratched when passing through the upper beam and the lower beam.

[0003] The Chinese invention patent with announcement number CN102873900B discloses a guide gap adjustment device for a hydraulic press square column and a movable crossbeam, which solves the technical problem that the guide bevel iron and the fixed bevel iron between the square column and the movable crossbeam of the existing press cannot be reliably fitted, including a through hole and a groove arranged on a pressure plate arranged on the top surface of the movable crossbeam, the outer end of the pressure plate and the groove on the pressure plate are arranged above the gap between the square column and the movable crossbeam of the hydraulic press, a wedge-shaped nut block and an inverted wedge-shaped guide block are movably arranged in the gap between the square column and the movable crossbeam of the hydraulic press, the wedge surface of the wedge-shaped nut block is movably matched with the wedge surface of the inverted wedge-shaped guide block, and the lead screw is screwed to the wedge-shaped nut block. This invention can facilitate the adjustment of the guide gap of the movable crossbeam of the hydraulic press and improve the service life of the hydraulic press.

[0004] The above device is set for adjusting the column after installation and in the later stage of use, and is not set for the specific installation of the column. The scope of use of the above device is square columns, and does not handle the installation of cylindrical columns. Summary of the invention

[0005] In view of the above technical problems, the present invention proposes the following technical solutions:

[0006] The cam is provided with a plurality of rollers for moving, the cam is rotatably mounted on the cam, the cam is also fixedly mounted with a plurality of base hydraulic cylinders, the other end of the base hydraulic cylinder is fixedly mounted with a main body seat, the main body seat is fixedly mounted with an inner hole positioning module, the inner hole positioning module comprises a contact hydraulic cylinder, the contact hydraulic cylinder is fixedly connected to the main body seat, the end of the contact hydraulic cylinder away from the main body seat is fixedly mounted with a main cylinder body, the main cylinder body is slidably mounted with an extrusion column, the extrusion column is fixedly mounted with a support seat, the support seat is fixedly mounted with a top cover seat, the top cover seat is slidably mounted with a plurality of center sliding rods, one end of the center sliding rod is provided with an arc block, the support seat is also rotatably mounted with an adjusting screw rod, the adjusting screw rod is threadedly connected to the center sliding rod, the main body seat is also fixedly mounted with an adjusting base, the adjusting base is fixedly mounted with a plurality of bottom hydraulic cylinders, the bottom hydraulic cylinder is also fixedly connected with an oil pipeline, and the other end of the bottom hydraulic cylinder is provided with a debugging module.

[0007] Furthermore, a swing rod is rotatably mounted on the extrusion column, a sliding rod is rotatably mounted on one end of the swing rod, a sliding groove is slidably mounted on the sliding rod, the sliding groove is slidably connected to the contact hydraulic cylinder, the sliding groove is slidably connected to the main cylinder body, a plurality of return springs are fixedly mounted on the sliding groove, and the other end of the return spring is fixedly mounted on the main cylinder body.

[0008] Furthermore, a limit rod is fixedly installed on the sliding groove, and the limit rod is slidably connected to the main cylinder body. One end of the limit rod is also in contact with the extrusion column to limit the movement of the extrusion column. A second motor is also fixedly installed on the contact hydraulic cylinder, and a first telescopic shaft is fixedly installed on the output end of the second motor. The first telescopic shaft is also rotatably connected to the extrusion column. A small belt is also arranged on the first telescopic shaft, and the other end of the small belt is arranged on the adjustment screw.

[0009] Furthermore, the debugging module includes a sliding plate, which is fixedly connected to the bottom hydraulic cylinder, and the sliding plate is also slidably connected to the adjustment base. A first clamping ring is also fixedly installed on the sliding plate, and a second clamping ring is also slidably installed on the sliding plate. A slide groove ring is fixedly installed on the second clamping ring, and a third clamping ring is slidably installed on the slide groove ring. A fourth clamping ring is also slidably installed on the slide groove ring, and an intermediate rod is fixedly installed on the fourth clamping ring, and the intermediate rod is fixedly connected to the first clamping ring.

[0010] Furthermore, a clamping screw is rotatably mounted on the second clamping ring, a clamping gear is fixedly mounted on the clamping screw, the clamping screw is connected to the third clamping ring via a thread, the clamping screw is also rotatably connected to the slide groove ring, a rack ring is also fixedly mounted on the sliding plate, and the rack ring is meshed with the clamping gear.

[0011] Furthermore, a gear shaft is rotatably mounted on the sliding plate, a first gear is fixedly mounted on the gear shaft, the first gear is meshed with a second clamping ring, a second gear is fixedly mounted on the gear shaft, a telescopic belt shaft is meshed with the second gear, the telescopic belt shaft is rotatably connected to the sliding plate, and the other end of the telescopic belt shaft is rotatably connected to the adjustment base.

[0012] Furthermore, a detection module is also provided on the main seat, and the detection module includes a fixed seat, which is fixedly connected to the main seat. A telescopic spring is also fixedly installed on the fixed seat, and an upper sliding rod is fixedly installed on the other end of the telescopic spring, and the upper sliding rod is slidably connected to the fixed seat.

[0013] Furthermore, an intermediate gear is meshed and installed on the upper slide bar, and the intermediate gear is also rotatably connected to the fixed seat. A lower slide bar is also meshed and installed on the intermediate gear, and the lower slide bar is also slidably connected to the fixed seat. An intermediate bevel gear is also fixedly installed on the intermediate gear, and a first bevel gear is meshed and installed on the intermediate bevel gear. A belt shaft is fixedly installed on the first bevel gear, and the belt shaft is rotatably connected to the fixed seat. A belt is arranged on the belt shaft, and the other end of the belt is arranged on the telescopic belt shaft to transmit power.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention stabilizes the column by arranging the first clamping ring, the second clamping ring, the third clamping ring, and the fourth clamping ring, so that the device can protect the column and prevent the column from tilting when the column position is subsequently moved and corrected; (2) The present invention protects the outer surface of the column to avoid collision during installation by arranging multiple rubber protrusions on the first clamping ring, the second clamping ring, the third clamping ring, and the fourth clamping ring, and increases the force-bearing area of ​​the device and the column by squeezing the rubber protrusions; (3) The present invention helps the device to center the crossbeam mounting hole by arranging the extrusion of the arc block on the center slide bar, and drives the extrusion column to squeeze the hydraulic oil in the main cylinder body to complete the calibration of the column and the mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of adjusting the screw rod structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the sliding plate structure of the present invention.

[0018] Figure 4 It is a cross-sectional view of the third clamping ring and the fourth clamping ring of the present invention.

[0019] Figure 5 It is a side view of the top cover seat structure of the present invention.

[0020] Figure 6 This is a cross-sectional view of the extruded column and support seat of the present invention.

[0021] Reference numerals: 101-base; 102-base disc; 103-base hydraulic cylinder; 104-main body seat; 105-contact hydraulic cylinder; 106-main cylinder body; 107-adjustment base; 201-extrusion column; 202-support seat; 203-adjustment screw rod; 204-center slide rod; 205-top cover seat; 206-swing rod; 207-slide rod; 208-slide groove; 209-second motor; 210-return spring; 211-limit rod; 212-oil pipeline; 213-first telescopic shaft; 214-small belt; 301-fixed seat; 302-telescopic spring; 303-upper slide bar; 304-middle gear; 305-lower slide bar; 306-middle bevel gear; 307-belt shaft; 308-belt; 401-sliding plate; 402-bottom hydraulic cylinder; 403-first clamping ring; 404-second clamping ring; 405-third clamping ring; 406-fourth clamping ring; 407-rack ring; 408-telescopic belt shaft; 409-gear shaft; 410-middle rod; 411-slide ring; 412-clamping screw; 413-clamping gear. Implementation

[0022] like Figure 1 As shown, a large hydraulic press frame assembly positioning device includes a base 101, on which a plurality of rollers for movement are arranged, a first motor is fixedly mounted on the base 101, a base disc 102 is fixedly mounted on the output shaft of the first motor, the base disc 102 is rotatably connected to the base 101, a plurality of base hydraulic cylinders 103 are also fixedly mounted on the base disc 102, and a main body seat 104 is fixedly mounted on the other end of the base hydraulic cylinder 103.

[0023] like Figure 1 , Figure 2As shown, the main body seat 104 is also fixedly mounted with a detection module, and the detection module includes a fixed seat 301, and the fixed seat 301 is fixedly connected to the main body seat 104. A telescopic spring 302 is also fixedly mounted on the fixed seat 301, and an upper slide bar 303 is fixedly mounted on the other end of the telescopic spring 302. The upper slide bar 303 is slidably connected to the fixed seat 301, and a rubber arc block is provided at one end of the upper slide bar 303. An intermediate gear 304 is also meshed and mounted on the upper slide bar 303. The intermediate gear 304 is also rotatably connected to the fixed seat 301, and a lower slide bar 305 is meshingly installed on the intermediate gear 304. A rubber arc block is also provided at one end of the lower slide bar 305. The lower slide bar 305 is also slidably connected to the fixed seat 301. An intermediate bevel gear 306 is fixedly installed on the intermediate gear 304, and a first bevel gear is meshingly installed on the intermediate bevel gear 306. A belt shaft 307 is fixedly installed on the first bevel gear, and the belt shaft 307 is rotatably connected to the fixed seat 301.

[0024] like Figure 1 , Figure 5 , Figure 6As shown, an inner hole positioning module is fixedly installed on the main seat 104, and the inner hole positioning module includes a contact hydraulic cylinder 105, and the contact hydraulic cylinder 105 is fixedly connected to the main seat 104, and a main cylinder body 106 is fixedly installed on one end of the contact hydraulic cylinder 105 away from the main seat 104, and an extrusion column 201 is slidably installed on the main cylinder body 106, and a support seat 202 is fixedly installed on the extrusion column 201, and a top cover seat 205 is fixedly installed on the support seat 202, and a plurality of center slide rods 204 are slidably installed on the top cover seat 205, and an arc block is provided at one end of the center slide rod 204, and an adjusting screw rod 203 is also rotatably installed on the support seat 202, and the adjusting screw rod 203 is threadedly connected to the center slide rod 204, and a swing rod 206 is also rotatably installed on the extrusion column 201, and a sliding rod 207 is rotatably installed on the other end of the swing rod 206, and the sliding rod 207 slides on A sliding groove 208 is dynamically installed, and the sliding groove 208 is slidably connected to the contact hydraulic cylinder 105, and the sliding groove 208 is slidably connected to the main cylinder body 106. A plurality of return springs 210 are fixedly installed on the sliding groove 208, and the other end of the return spring 210 is fixedly installed on the main cylinder body 106. A limit rod 211 is also fixedly installed on the sliding groove 208, and the limit rod 211 is slidably connected to the main cylinder body 106. One end of the limit rod 211 is also in contact with the extrusion column 201 to limit the movement of the extrusion column 201. A second motor 209 is also fixedly installed on the contact hydraulic cylinder 105, and a first telescopic shaft 213 is fixedly installed on the output end of the second motor 209. The first telescopic shaft 213 is also rotatably connected to the extrusion column 201. A small belt 214 is also arranged on the first telescopic shaft 213, and the other end of the small belt 214 is arranged on the adjusting screw 203 for transmission.

[0025] like Figure 1 , Figure 3 , Figure 4As shown, the main body seat 104 is also fixedly mounted with an adjustment base 107, and a plurality of bottom hydraulic cylinders 402 are fixedly mounted on the adjustment base 107, and the bottom hydraulic cylinders 402 are also fixedly connected to the oil pipeline 212, and a debugging module is provided at the other end of the bottom hydraulic cylinder 402, and the debugging module includes a sliding plate 401, and the sliding plate 401 is fixedly connected to the bottom hydraulic cylinder 402, and the sliding plate 401 is also slidably connected to the adjustment base 107, and a first clamping ring 403 is also fixedly mounted on the sliding plate 401, and the sliding plate 401 is fixedly mounted with a first clamping ring 403. A second clamping ring 404 is also slidably installed, a slide groove ring 411 is fixedly installed on the second clamping ring 404, a third clamping ring 405 is slidably installed on the slide groove ring 411, a fourth clamping ring 406 is also slidably installed on the slide groove ring 411, an intermediate rod 410 is fixedly installed on the fourth clamping ring 406, and the intermediate rod 410 is fixedly connected to the first clamping ring 403, and a plurality of rubber protrusions are respectively provided on the first clamping ring 403, the second clamping ring 404, the third clamping ring 405, and the fourth clamping ring 406 to prevent scratching the surface of the column.

[0026] like Figure 1 , Figure 3 , Figure 4 As shown, a clamping screw 412 is rotatably mounted on the second clamping ring 404, a clamping gear 413 is fixedly mounted on the clamping screw 412, the clamping screw 412 is connected to the third clamping ring 405 by a thread, the clamping screw 412 is also rotatably connected to the slide ring 411, a rack ring 407 is also fixedly mounted on the sliding plate 401, the rack ring 407 is meshed with the clamping gear 413, and a gear shaft 409 is also rotatably mounted on the sliding plate 401, the gear shaft 409 is 9 is fixedly mounted with a first gear, the first gear is meshed with a second clamping ring 404, the gear shaft 409 is also fixedly mounted with a second gear, the second gear is meshed with a telescopic belt shaft 408, the telescopic belt shaft 408 is rotatably connected to the sliding plate 401, the other end of the telescopic belt shaft 408 is rotatably connected to the adjustment base 107, the telescopic belt shaft 408 is also provided with a belt 308, the other end of the belt 308 is provided on the belt shaft 307 for transmitting power.

[0027] Working principle: When using this device, it is necessary to erect the column and place the crossbeam horizontally, and then move the device to the predetermined position through the roller on the base 101, and then start the base hydraulic cylinder 103 to drive the main seat 104 to move toward the column, so that the end of the lower slide bar 305 in the detection module equipped with the rubber arc block contacts the column. After the lower slide bar 305 contacts the column, the multiple rubber protrusions on the first clamping ring 403, the second clamping ring 404, the third clamping ring 405, and the fourth clamping ring 406 will also contact the surface of the column, and the base hydraulic cylinder 103 will continue to The main body 104 is driven to move, and at this time, the lower slide bar 305 will be squeezed by the column and move toward the main body 104, which will drive the middle gear 304 to rotate, and at the same time drive the upper slide bar 303 to move away from the main body 104. When the middle gear 304 rotates, the belt shaft 307 is driven to rotate through the middle bevel gear 306 and the first bevel gear. The belt shaft 307 then drives the telescopic belt shaft 408 to rotate through the belt 308, and the telescopic belt shaft 408 drives the gear shaft 409 to rotate, so that the first gear on the gear shaft 409 drives the second clamping ring 404 to rotate around the axis of the column. When the second clamping ring 404 rotates, it will also drive the third clamping ring 405 and the slide ring 411 to slide on the fourth clamping ring 406. While rotating, since the main seat 104 is moving toward the column, the second clamping ring 404 and the third clamping ring 405 will continue to approach the column while moving around the column, squeezing the rubber protrusions on the second clamping ring 404 and the third clamping ring 405, so that the rubber protrusions increase the contact area with the column, preparing for the subsequent movement of the column position. At the same time, when the second clamping ring 404 and the third clamping ring 405 rotate, the second clamping ring 404 will also drive the clamping gear 41 3 rotates, so that the clamping gear 413 is driven by the rack ring 407, thereby driving the clamping gear 413 to rotate. While the clamping gear 413 rotates, the clamping gear 413 also drives the third clamping ring 405 to move away from the first clamping ring 403 through the clamping screw 412, so that the third clamping ring 405 adjusts its position. After the second clamping ring 404 and the third clamping ring 405 rotate to a predetermined angle, they cooperate with the first clamping ring 403 and the second clamping ring 404, and the third clamping ring 405 and the fourth clamping ring 406 to fix the column on the device, and at this time the base hydraulic cylinder 103 stops working.

[0028] When the base hydraulic cylinder 103 stops working, the roller on the base 101 drives the device to move to the bottom of the beam, and then the contact hydraulic cylinder 105 is started, so that the contact hydraulic cylinder 105 drives the inner hole positioning module to move away from the fixed seat 301, so that the top cover seat 205 in the inner hole positioning module contacts the bottom plane of the beam, and after the contact, the roller on the base 101 continues to drive the top cover seat 205 to move on the bottom plane of the beam until the top cover seat 205 enters the column mounting hole on the beam, and when the top cover seat 205 is completely in When entering the beam mounting hole, the contact hydraulic cylinder 105 drives the inner hole positioning module to move away from the fixed seat 301, so that the top cover seat 205 and multiple center slide bars 204 enter the beam mounting hole. At the same time, the bottom plane of the beam will contact the sliding rod 207 and the sliding groove 208, and the sliding rod 207 and the sliding groove 208 will be squeezed, thereby driving the limit rod 211 to move toward the main seat 104, so that the limit rod 211 is out of contact with the extrusion column 201, so as to release the restriction of the limit rod 211 on the extrusion column 201.

[0029] After the extrusion column 201 is restricted and contacted, the arc block on the center slide 204 will contact the inner surface of the beam mounting hole. It is worth mentioning that only one arc block is in contact with the inner surface of the beam mounting hole. Then the second motor 209 is started to drive the adjustment screw 203 to rotate through the first telescopic shaft 213 and the small belt 214. The adjustment screw 203 then drives the center slide 204 to move away from the support seat 202. At this time, the center slide 204 in contact with the inner surface of the beam mounting hole will drive the top cover seat 205 and the extrusion column 201 to move away from the contact hydraulic cylinder 105 until multiple arc blocks on the center slide 204 are It contacts the inner surface of the beam mounting hole, and during this movement, the extrusion column 201 will squeeze the hydraulic oil in the main cylinder 106, so that the hydraulic oil is transmitted to the bottom hydraulic cylinder 402 through the oil pipeline 212, and the bottom hydraulic cylinder 402 then drives the debugging module and the column clamped by the debugging module to move away from the main seat 104. This movement continues until the arc blocks on the multiple center slide bars 204 are in contact with the inner surface of the beam mounting hole. At this time, the column will be aligned with the axis of the mounting hole on the beam, and then it can be installed. If a lower beam is installed, the base disc 102 is driven by the first motor to rotate 180 degrees to install the lower beam on the column.

Claims

1. A large hydraulic press frame assembly positioning device, comprising a base (101), the base (101) being provided with a plurality of rollers for movement, a base disc (102) being rotatably mounted on the base (101), a plurality of base hydraulic cylinders (103) being fixedly mounted on the base disc (102), a main body seat (104) being fixedly mounted on the other end of the base hydraulic cylinder (103), characterized in that: An inner hole positioning module is fixedly mounted on the main body seat (104), and the inner hole positioning module comprises a contact hydraulic cylinder (105), the contact hydraulic cylinder (105) is fixedly connected to the main body seat (104), a main cylinder body (106) is fixedly mounted on one end of the contact hydraulic cylinder (105) away from the main body seat (104), an extrusion column (201) is slidably mounted on the main cylinder body (106), a support seat (202) is fixedly mounted on the extrusion column (201), a top cover seat (205) is fixedly mounted on the support seat (202), and a sliding bearing seat (206) is mounted on the top cover seat (205). A plurality of center slide bars (204) are installed, one end of each of the center slide bars (204) is provided with an arc block, an adjustment screw rod (203) is rotatably installed on the support seat (202), the adjustment screw rod (203) is connected to the center slide bar (204) via a thread, an adjustment base (107) is fixedly installed on the main body seat (104), a plurality of bottom hydraulic cylinders (402) are fixedly installed on the adjustment base (107), the bottom hydraulic cylinders (402) are also fixedly connected to the oil pipeline (212), and a debugging module is provided on the other end of each of the bottom hydraulic cylinders (402); A swing rod (206) is also rotatably mounted on the extrusion column (201), a sliding rod (207) is rotatably mounted on one end of the swing rod (206), a sliding groove (208) is slidably mounted on the sliding rod (207), the sliding groove (208) is slidably connected to the contact hydraulic cylinder (105), the sliding groove (208) is slidably connected to the main cylinder body (106), a plurality of return springs (210) are fixedly mounted on the sliding groove (208), and the other end of the return spring (210) is fixedly mounted on the main cylinder body (106); A limit rod (211) is also fixedly mounted on the sliding groove (208), the limit rod (211) is slidably connected to the main cylinder body (106), one end of the limit rod (211) is also in contact with the extrusion column (201) to limit the movement of the extrusion column (201), a second motor (209) is also fixedly mounted on the contact hydraulic cylinder (105), a first telescopic shaft (213) is fixedly mounted on the output end of the second motor (209), the first telescopic shaft (213) is also rotatably connected to the extrusion column (201), a small belt (214) is also arranged on the first telescopic shaft (213), and the other end of the small belt (214) is arranged on the adjustment screw rod (203); The debugging module comprises a sliding plate (401), wherein the sliding plate (401) is fixedly connected to a bottom hydraulic cylinder (402), and the sliding plate (401) is also slidably connected to an adjustment base (107). A first clamping ring (403) is also fixedly mounted on the sliding plate (401), and a second clamping ring (404) is also slidably mounted on the sliding plate (401). A slide groove ring (411) is fixedly mounted on the second clamping ring (404), and a third clamping ring (405) is slidably mounted on the slide groove ring (411). A fourth clamping ring (406) is also slidably mounted on the slide groove ring (411), and an intermediate rod (410) is fixedly mounted on the fourth clamping ring (406), and the intermediate rod (410) is fixedly connected to the first clamping ring (403).

2. According to claim 1, a large hydraulic press frame assembly positioning device is characterized in that: A clamping screw (412) is rotatably mounted on the second clamping ring (404), a clamping gear (413) is fixedly mounted on the clamping screw (412), the clamping screw (412) is connected to the third clamping ring (405) via a threaded connection, the clamping screw (412) is also rotatably connected to the slide groove ring (411), and a rack ring (407) is also fixedly mounted on the sliding plate (401), the rack ring (407) meshing with the clamping gear (413).

3. According to claim 2, a large hydraulic press frame assembly positioning device is characterized in that: A gear shaft (409) is also rotatably mounted on the sliding plate (401), a first gear is fixedly mounted on the gear shaft (409), the first gear is meshed with the second clamping ring (404), a second gear is also fixedly mounted on the gear shaft (409), a telescopic belt shaft (408) is meshed with the second gear, the telescopic belt shaft (408) is rotatably connected to the sliding plate (401), and the other end of the telescopic belt shaft (408) is rotatably connected to the adjustment base (107).

4. A large hydraulic press frame assembly positioning device according to claim 3, characterized in that: A detection module is also provided on the main body seat (104), and the detection module comprises a fixed seat (301), the fixed seat (301) is fixedly connected to the main body seat (104), a telescopic spring (302) is also fixedly mounted on the fixed seat (301), an upper sliding rod (303) is fixedly mounted on the other end of the telescopic spring (302), and the upper sliding rod (303) is slidably connected to the fixed seat (301).

5. A large hydraulic press frame assembly positioning device according to claim 4, characterized in that: The upper sliding rod (303) is also meshed with an intermediate gear (304), and the intermediate gear (304) is also rotatably connected to the fixed seat (301). The intermediate gear (304) is also meshed with a lower sliding rod (305), and the lower sliding rod (305) is also slidably connected to the fixed seat (301). The intermediate gear (304) is also fixedly mounted with an intermediate bevel gear (306), and the intermediate bevel gear (306) is meshed with a first bevel gear, and a belt shaft (307) is fixedly mounted on the first bevel gear, and the belt shaft (307) is rotatably connected to the fixed seat (301). A belt (308) is arranged on the belt shaft (307), and the other end of the belt (308) is arranged on a telescopic belt shaft (408) for transmitting power.

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