Supporting leg adjusting device of skid

Abstract

The invention belongs to the technical field of skid adjustment, and discloses a skid supporting leg adjusting device which comprises a plurality of parallel gantry frames arranged at intervals, and a skid conveying mechanism used for conveying a skid is fixedly installed in the middles of the multiple gantry frames. A clamping and positioning mechanism used for clamping and positioning the skid is arranged at the position, close to the middle of the skid conveying mechanism, of the skid conveying mechanism, a plurality of automatic adjusting mechanisms are arranged on the gantry frame, each automatic adjusting mechanism comprises a sliding table installation base, and an electric sliding table is fixedly installed on each sliding table installation base; a vertical pressing assembly is fixedly installed at the moving end of the electric sliding table. According to the supporting leg adjusting device of the skid, the position of the sliding supporting leg on the skid can be automatically adjusted on a production line body.

Description

Technical Field

[0001] The invention belongs to the technical field of slide adjustment, and in particular relates to a support leg adjustment device of a slide. Background Art

[0002] In automobile production lines, skid conveyor systems are mostly used to transport the car bodies or assembled workpieces to be produced. In the skid conveyor system, the skid is the carrier of the automobile body during transportation and occupies a relatively important position in the conveyor system.

[0003] In traditional sled conveyor line systems, the support legs of the sled are generally fixed and cannot be adjusted. If different workpieces share one sled, there will be multiple supports, which will appear extremely messy and increase production costs. Manual adjustments may also be required, which will cause a waste of manpower, and the adjustment accuracy cannot be guaranteed, reducing the use effect. Summary of the invention

[0004] The main technical problem to be solved by the present invention is to provide a support leg adjustment device for a sled, which can automatically adjust the position of the sliding support legs on the sled on the production line, so that the sled is suitable for supporting different workpieces, and the adjustment is accurate and efficient, making the overall operation of the production line more accurate and flexible.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A support leg adjustment device for a sled, comprising a plurality of gantry frames arranged in parallel and at intervals, a sled conveying mechanism for conveying the sled fixedly installed in the middle of the plurality of gantry frames, a clamping and positioning mechanism for clamping and positioning the sled arranged near the middle of the sled conveying mechanism, a plurality of automatic adjustment mechanisms arranged on the gantry frames, the automatic adjustment mechanisms comprising a slide mounting seat, an electric slide fixedly installed on the slide mounting seat, and a vertical pressing assembly fixedly installed on the moving end of the electric slide; The vertical pressing assembly comprises a telescopic cylinder, which is fixedly mounted on the moving end of the electric slide, and a top pressure block is arranged downward and fixedly mounted on the telescopic end of the telescopic cylinder.

[0006] The following is a further optimization of the above technical solution by the present invention: The sled conveying mechanism includes a conveying frame with an overall rectangular frame structure. A plurality of conveying shafts are rotatably arranged at the middle position of the conveying frame. The plurality of conveying shafts are arranged in parallel and at intervals along the length direction of the conveying frame. A conveying drive assembly for driving each conveying shaft to rotate is arranged at the middle position of the conveying frame.

[0007] Further optimization: A conveying groove wheel and a conveying wheel are respectively fixedly installed on each conveying shaft near its two ends, and an annular groove is opened on the outer wheel surface of the conveying groove wheel.

[0008] Further optimization: the conveying drive assembly includes a plurality of synchronous pulleys fixedly mounted on the conveying shaft near the conveying wheel position, and the same synchronous belt is sleeved on the synchronous pulleys between two adjacent conveying shafts; a driving motor is arranged at the middle position of the conveying frame, and the power output end of the driving motor is connected to at least one of the conveying shafts through a synchronous belt drive assembly.

[0009] Further optimization: the clamping and positioning mechanism includes a clamping mounting seat, the clamping mounting seat is fixedly mounted on the conveying frame, a support seat is fixedly mounted on the clamping mounting seat, two clamping arms are hinged on the support seat, and a linkage rod is also hinged between the two clamping arms.

[0010] Further optimization: A clamping drive cylinder is fixedly mounted on the clamping mounting seat, and a power output end of the clamping drive cylinder is hinged to one of the clamping arms.

[0011] Further optimization: a pressing groove is provided on the lower end surface of the top pressure block.

[0012] Further optimization: a detection plate is fixedly installed on one side of the top pressure block, the detection plate is arranged obliquely, and a detection sensor is fixedly installed on the detection plate.

[0013] Further optimization: a protective cover is fixedly installed on the conveying frame at a position close to the conveying wheel, and a slot is opened on the protective cover at a position corresponding to each conveying wheel, and the upper end of the conveying wheel is located above the protective cover through the slot.

[0014] The present invention adopts the above-mentioned technical scheme, which is ingenious in conception and reasonable in structure. The sled conveying mechanism is used to convey the sled, so that the sled is conveyed to the clamping position, and then the clamping and positioning mechanism is used to clamp the sled with two clamping arms, thereby clamping and positioning the sled, ensuring that when the adjustable support legs on the sled are adjusted, the sled will not move, thereby improving the adjustment accuracy of the adjustable support legs.

[0015] The electric slide of the automatic adjustment mechanism in the present invention can drive the telescopic cylinder to drive the top pressure block to move, so as to adjust the position of the top pressure block. The telescopic cylinder works to drive the top pressure block to move downward, so that the top pressure block can apply a downward pressing force. The electric slide continues to work to drive the top pressure block to move, and then can drive the sliding support legs to move to adjust the position of the sliding support legs, which is convenient to use.

[0016] The present invention adopts the above-mentioned technical scheme, and the automatic adjustment mechanism controls the movement of the top pressure block or the sliding support leg through the electric slide, which is convenient to use and can improve the adjustment accuracy of the sliding support leg. The telescopic cylinder drives the top pressure block to move downward to adjust the position of the top pressure block, and can make the top pressure block apply downward pressing force. The top pressure block can also drive the sliding support leg to move, making the overall structure more concise and flexible, and the overall degree of automation is high, which reduces labor intensity, can accurately complete the adjustment action of the sliding support leg on the skid, and improves the use effect.

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the skid in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an adjustable support leg in an embodiment of the present invention; Figure 3 is a cross-sectional view of an adjustable support leg in an embodiment of the present invention; Figure 4 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 5 A schematic diagram of another perspective of the overall structure in an embodiment of the present invention; Figure 6 It is a structural schematic diagram of the sled conveying mechanism in an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a clamping and positioning mechanism in an embodiment of the present invention; Figure 8 It is a structural schematic diagram of the automatic adjustment mechanism in an embodiment of the present invention; Fig. 9 Schematic diagram of the structure of the top pressure block in an embodiment of the present invention.

[0019] In the figure: 1-integral frame; 101-frame side beam; 102-support block; 103-adjustable support leg; 1031-sliding support leg; 1032-limiting block; 1033-sliding block; 1034-slide rail; 1035-mounting plate; 104-positioning locking device; 1041-positioning block; 1042-positioning groove; 1043-mounting frame; 1044-swing arm; 1045-hinged shaft; 1046-torsion spring; 1047-positioning block; 105-lifting ring; 106-support beam; 107-connecting beam; 108-mounting beam; 2-gantry frame; 3-sled Conveying mechanism; 301-conveying frame; 302-conveying shaft; 303-conveying groove wheel; 304-conveying wheel; 305-synchronous pulley; 306-synchronous belt; 307-driving motor; 308-protective cover; 309-motor mounting seat; 4-clamping positioning mechanism; 401-clamping mounting seat; 402-support seat; 403-clamping arm; 404-linkage rod; 405-clamping drive cylinder; 5-automatic adjustment mechanism; 501-slide mounting seat; 502-electric slide; 503-telescopic cylinder; 504-top pressure block; 505-detection plate; 506-detection sensor. DETAILED DESCRIPTION

[0020] like Figure 1-3 As shown: a support leg adjustment device for a sled, comprising a plurality of gantry frames 2 arranged in parallel and at intervals, a sled conveying mechanism 3 for conveying the sled is fixedly installed in the middle of the plurality of gantry frames 2, a clamping and positioning mechanism 4 for clamping and positioning the sled is arranged near the middle position of the sled conveying mechanism 3, and a plurality of automatic adjustment mechanisms 5 are arranged on the gantry frames 2.

[0021] The overall structure of the skid is as follows Figure 1-3 As shown, the slide includes an overall frame 1, the overall frame 1 includes two frame side beams 101 which are parallel and spaced apart, a support frame is fixedly installed at the middle position of the two frame side beams 101, a plurality of adjustable support legs 103 are arranged on the support frame, and the overall structure of the adjustable support leg 103 includes a sliding support leg 1031, a limiting block 1032 is fixedly installed on the upper end of the sliding support leg 1031, and the lower end of the sliding support leg 1031 is slidably installed on the support frame through a sliding assembly, and a positioning locking device 104 for locking the position of the sliding support leg 1031 is provided on one side of the sliding assembly.

[0022] The support frame includes a support beam 106, which is fixedly installed at the upper middle position of the two frame side beams 101. The support beam 106 and the frame side beams 101 are arranged vertically, and both ends of the support beam 106 extend to the outside of the two frame side beams 101 away from one side.

[0023] A group of connecting beams are fixedly installed on both sides of the supporting cross beam 106 between the two frame side beams 101, and each group of connecting beams includes two connecting beams 107 which are parallel and spaced apart. The connecting beams 107 and the frame side beams 101 are arranged vertically, and the two ends of the connecting beams 107 are fixedly connected to the frame side beams 101 respectively.

[0024] A mounting beam 108 is fixedly installed between two adjacent connecting beams 107 . The mounting beam 108 and the connecting beams 107 are arranged vertically, and two ends of the mounting beam 108 are fixedly connected to the corresponding connecting beams 107 , respectively.

[0025] In this embodiment, the support cross beam 106 and the frame side beam 101 , the connection beam 107 and the frame side beam 101 , and the installation beam 108 and the corresponding connection beam 107 are fixedly connected by welding or bolts.

[0026] In this embodiment, there are four adjustable supporting legs 103, and the four adjustable supporting legs 103 are respectively a first adjustable supporting leg, a second adjustable supporting leg, a third adjustable supporting leg and a fourth adjustable supporting leg. The first adjustable supporting leg and the second adjustable supporting leg are respectively fixedly mounted on the supporting beam 106 near its two ends; the third adjustable supporting leg and the fourth adjustable supporting leg are respectively fixedly mounted on two mounting beams 108.

[0027] A plurality of support blocks 102 are fixedly mounted on the support beam 106 and the connection beam 107 , and the upper end surface of the support block 102 is a plane.

[0028] The frame side beam 101 is provided with lifting rings 105 near both ends thereof, and the lifting rings 105 are integrally connected to the frame side beam 101 .

[0029] The sliding assembly includes a sliding block 1033 fixedly mounted at the lower end of the sliding support leg 1031. The sliding block 1033 is slidably mounted on a sliding rail 1034. The sliding rail 1034 is arranged along the sliding direction of the sliding support leg 1031. A mounting plate 1035 is fixedly mounted at the lower end of the sliding rail 1034.

[0030] With this design, the cooperation between the sliding block 1033 and the sliding rail 1034 can support the sliding support leg 1031 to slide, thereby adjusting the position of the sliding support leg 1031 for easy use.

[0031] In this embodiment, the mounting plates 1035 of the adjustable support legs 103 are respectively fixedly mounted on the corresponding support beams 106 and mounting beams 108, and the adjustable support legs 103 can be slidably mounted on the corresponding support beams 106 and mounting beams 108 through the cooperation of the sliding blocks 1033 and the sliding rails 1034, which facilitates assembly and installation.

[0032] The positioning and locking device 104 includes a positioning block 1041 , which is fixedly mounted on one side of the mounting plate 1035 , and the positioning block 1041 and the slide rail 1034 are arranged in parallel.

[0033] A plurality of positioning grooves 1042 are formed on the outer surface of the positioning block 1041 , and the plurality of positioning grooves 1042 are arranged at intervals.

[0034] In this embodiment, the opening position of each positioning slot 1042 corresponds to the parking position of the sliding support leg 1031 .

[0035] A mounting frame 1043 is fixedly mounted on one side of the sliding support leg 1031 , a hinge shaft 1045 is fixedly mounted in the middle of the mounting frame 1043 , and a swing arm 1044 is rotatably connected to the hinge shaft 1045 .

[0036] The swing arm 1044 is hinged to the mounting frame 1043 via a hinge shaft 1045, which facilitates assembly and installation.

[0037] The hinge shaft 1045 is sleeved with a torsion spring 1046 , and two ends of the torsion spring 1046 are respectively connected to the mounting frame 1043 and the swing arm 1044 .

[0038] The upper end of the swing arm 1044 is provided with a pressing surface, and the lower end of the swing arm 1044 is located at one side of the positioning block 1041 and is integrally connected with a positioning block 1047 , which is engaged with the positioning groove 1042 .

[0039] With such a design, in the initial state, the torsion spring 1046 outputs elastic force to push the swing arm 1044 to rotate along the hinge shaft 1045. At this time, the positioning block 1047 at the lower end of the swing arm 1044 is engaged in the corresponding positioning groove 1042. The position of the sliding support leg 1031 can be limited by the engagement between the positioning block 1047 and the positioning groove 1042, which is convenient for use.

[0040] When the pressing surface at the upper end of the swing arm 1044 is pressed, and the pressing force is greater than the elastic force of the torsion spring 1046, the pressing force on the swing arm 1044 overcomes the elastic force of the torsion spring 1046 to cause the swing arm 1044 to rotate along the hinge shaft 1045. At this time, the swing arm 1044 drives the positioning block 1047 to swing to the side away from the positioning slot 1042, thereby causing the positioning block 1047 to disengage from the positioning slot 1042 for easy use.

[0041] At this time, by applying a moving force to the sliding support leg 1031, the sliding support leg 1031 can be driven to move on the slide rail 1034 to adjust the position of the sliding support leg 1031. After the adjustment is completed, the pressing force on the upper end of the swing arm 1044 is released. At this time, the torsion spring 1046 outputs elastic force to push the swing arm 1044 to swing, so that the positioning block 1047 is engaged with the corresponding positioning groove 1042, and then the position of the sliding support leg 1031 can be limited again.

[0042] like Figure 1-9 As shown: the sled conveying mechanism 3 includes a conveying frame 301 with an overall structure of a rectangular frame, and a plurality of conveying shafts 302 are arranged at the middle position of the conveying frame 301. The plurality of conveying shafts 302 are arranged in parallel and at intervals along the length direction of the conveying frame 301, and the two ends of the conveying shafts 302 are rotatably connected to the corresponding inner side surfaces of the conveying frame 301 respectively.

[0043] A conveying groove wheel 303 and a conveying wheel 304 are fixedly mounted on each conveying shaft 302 near both ends thereof, and the spacing between the conveying groove wheel 303 and the conveying wheel 304 matches the distance between the two frame side beams 101 on the sled.

[0044] With such a design, when the sled conveying mechanism 3 conveys the sled, the two frame side beams 101 of the sled are respectively located above the conveying groove wheel 303 and the conveying wheel 304, and the conveying shaft 302 rotates to drive the conveying groove wheel 303 and the conveying wheel 304 to rotate, thereby conveying the sled.

[0045] An annular groove is formed on the outer wheel surface of the conveying groove wheel 303, through which the conveying position of the slide can be limited to prevent the slide from being displaced during conveying.

[0046] A conveying drive assembly for driving each conveying shaft 302 to rotate is disposed at the middle position of the conveying frame 301 .

[0047] The conveying drive assembly includes a plurality of synchronous pulleys 305 fixedly mounted on the conveying shaft 302 near the conveying wheel 304 , and the same synchronous belt 306 is sleeved on the synchronous pulleys 305 between two adjacent conveying shafts 302 .

[0048] A driving motor 307 is disposed at the middle position of the conveying frame 301 , and a power output end of the driving motor 307 is drivingly connected to at least one of the conveying shafts 302 via a synchronous belt transmission assembly.

[0049] The driving motor 307 drives at least one conveying shaft 302 to rotate through the synchronous belt transmission assembly. At this time, the cooperation of the synchronous pulley 305 and the synchronous belt 306 can drive each conveying shaft 302 to rotate synchronously, thereby driving the conveying groove wheel 303 and the conveying wheel 304 to rotate, which is convenient to use.

[0050] The driving motor 307 is fixedly mounted on a motor mounting seat 309 , and the motor mounting seat 309 is fixedly mounted on the conveying frame 301 .

[0051] A protective cover plate 308 is fixedly installed on the conveying frame 301 near the conveying wheel 304 , and slots are provided on the protective cover plate 308 at positions corresponding to the conveying wheels 304 , and the upper ends of the conveying wheels 304 are located above the protective cover plate 308 through the slots.

[0052] The clamping and positioning mechanism 4 includes a clamping mounting seat 401 , which is fixedly mounted on the conveying frame 301 , and a support seat 402 is fixedly mounted on the clamping mounting seat 401 , and two clamping arms 403 are hinged on the support seat 402 , and a linkage rod 404 is also hinged between the two clamping arms 403 .

[0053] In this design, the two clamping arms 403 are connected by a linkage rod 404. When one clamping arm 403 rotates, the linkage rod 404 drives the other clamping arm 403 to rotate, so that the two clamping arms 403 can clamp or release.

[0054] A clamping drive cylinder 405 is fixedly mounted on the clamping mounting seat 401 , and a power output end of the clamping drive cylinder 405 is hinged to one of the clamping arms 403 .

[0055] With such a design, the clamping drive cylinder 405 works to extend or retract its telescopic end, and the telescopic end of the clamping drive cylinder 405 drives the corresponding clamping arm 403 to swing, and drives the other clamping arm 403 to rotate through the cooperation of the linkage rod 404. At this time, the two clamping arms 403 perform clamping or releasing actions.

[0056] When in use, the sled conveying mechanism 3 works to convey the sled. When the sled is conveyed to the clamping position, the clamping drive cylinder 405 works to enable the two clamping arms 403 to perform a clamping action through the cooperation of the linkage rod 404. At this time, the two clamping arms 403 clamp the corresponding connecting beams 107 on the sled to achieve clamping and positioning of the sled, ensuring that the sled will not move when the adjustable support legs 103 on the sled are adjusted, thereby improving the adjustment accuracy of the adjustable support legs 103.

[0057] The automatic adjustment mechanism 5 comprises a slide mounting seat 501 , on which an electric slide 502 is fixedly mounted, and on the moving end of the electric slide 502 a vertical pressing assembly is fixedly mounted.

[0058] The vertical pressing assembly includes a telescopic cylinder 503 , which is fixedly mounted on the moving end of the electric slide 502 , and a top pressing block 504 is arranged downward and fixedly mounted on the telescopic end of the telescopic cylinder 503 .

[0059] The electric slide 502 is used to drive the telescopic cylinder 503 to move horizontally, thereby adjusting the position of the top pressure block 504. The telescopic cylinder 503 is used to drive the top pressure block 504 to move up and down.

[0060] A detection plate 505 is fixedly mounted on one side of the top pressure block 504 . The detection plate 505 is arranged obliquely, and a detection sensor 506 is fixedly mounted on the detection plate 505 .

[0061] In this embodiment, the overall structure of the top pressing block 504 is as follows: Fig. 9 As shown, a pressing groove is provided on the lower end surface of the pressing block 504 , and the pressing groove matches the pressing surface on the upper end of the swing arm 1044 .

[0062] In this embodiment, there are four automatic adjustment mechanisms 5 , and the four automatic adjustment mechanisms 5 are arranged corresponding to the four adjustable support legs 103 on the sled, and the slide mounting seats 501 of the four automatic adjustment mechanisms 5 are respectively fixedly mounted on the gantry frame 2 .

[0063] In this embodiment, the electric slide 502 in the automatic adjustment mechanism 5 is arranged in parallel with the corresponding slide rail 1034 , and the automatic adjustment mechanism 5 is used to drive the corresponding sliding support leg 1031 to move on the slide rail 1034 .

[0064] The specific working process of the automatic adjustment mechanism 5 is as follows: first, the electric slide 502 works to drive the telescopic cylinder 503 to drive the top pressure block 504 to move, so that the top pressure block 504 is parked above the corresponding positioning locking device 104, and then the telescopic cylinder 503 works to drive the top pressure block 504 to move downward and contact with the corresponding swing arm 1044. At this time, the top pressure block 504 applies a pressing force to the upper end of the swing arm 1044, and the pressing force is greater than the elastic force of the torsion spring 1046. At this time, the swing arm 1044 rotates along the hinge shaft 1045, and the swing arm 1044 drives the positioning block 1047 to move and disengage from the positioning groove 1042.

[0065] Then the electric slide 502 works to drive the telescopic cylinder 503 to move horizontally. At this time, the top pressure block 504 moves to apply a moving force to the sliding support leg 1031, which can drive the sliding support leg 1031 to move on the slide rail 1034 to adjust the position of the sliding support leg 1031.

[0066] After the adjustment is completed, the telescopic cylinder 503 works to drive the pressing block 504 to move upward and reset. At this time, the pressing block 504 releases the pressing force on the upper end of the swing arm 1044. At this time, the torsion spring 1046 outputs elastic force to push the swing arm 1044 to swing, so that the positioning block 1047 is engaged with the corresponding positioning groove 1042, and then the position of the sliding support leg 1031 can be limited again.

[0067] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A support leg adjustment device for a sled, characterized in that: The invention comprises a plurality of gantry frames (2) arranged in parallel and at intervals, a sled conveying mechanism (3) for conveying a sled is fixedly installed in the middle of the plurality of gantry frames (2), a clamping and positioning mechanism (4) for clamping and positioning the sled is arranged near the middle of the sled conveying mechanism (3), a plurality of automatic adjustment mechanisms (5) are arranged on the gantry frames (2), the automatic adjustment mechanisms (5) comprise a slide mounting seat (501), an electric slide (502) is fixedly installed on the slide mounting seat (501), and a vertical pressing assembly is fixedly installed on the moving end of the electric slide (502); The vertical pressing assembly comprises a telescopic cylinder (503), the telescopic cylinder (503) being fixedly mounted on the moving end of the electric slide (502), and a top pressing block (504) being arranged downward and fixedly mounted on the telescopic end of the telescopic cylinder (503).

2. The support leg adjustment device of a sled according to claim 1, characterized in that: The sled conveying mechanism (3) comprises a conveying frame (301) having an overall rectangular frame structure, a plurality of conveying shafts (302) being rotatably arranged at a middle position of the conveying frame (301), the plurality of conveying shafts (302) being arranged in parallel and at intervals along the length direction of the conveying frame (301), and a conveying drive assembly for driving each conveying shaft (302) to rotate being arranged at a middle position of the conveying frame (301).

3. The support leg adjustment device of a sled according to claim 2, characterized in that: A conveying groove wheel (303) and a conveying wheel (304) are respectively fixedly mounted on each conveying shaft (302) near its two ends, and an annular groove is formed on the outer wheel surface of the conveying groove wheel (303).

4. The support leg adjustment device of a sled according to claim 3, characterized in that: The conveying drive assembly comprises a plurality of synchronous pulleys (305) fixedly mounted on the conveying shaft (302) near the conveying wheel (304), and the synchronous pulleys (305) between two adjacent conveying shafts (302) are sleeved with the same synchronous belt (306); a driving motor (307) is arranged at the middle position of the conveying frame (301), and a power output end of the driving motor (307) is transmission-connected to at least one of the conveying shafts (302) via a synchronous belt transmission assembly.

5. The support leg adjustment device of a sled according to claim 4, characterized in that: The clamping and positioning mechanism (4) comprises a clamping mounting seat (401), the clamping mounting seat (401) being fixedly mounted on the conveying frame (301), a support seat (402) being fixedly mounted on the clamping mounting seat (401), two clamping arms (403) being hingedly connected to the support seat (402), and a linkage rod (404) being hingedly connected between the two clamping arms (403).

6. The support leg adjustment device of a sled according to claim 5, characterized in that: A clamping drive cylinder (405) is fixedly mounted on the clamping mounting seat (401), and a power output end of the clamping drive cylinder (405) is hinged to one of the clamping arms (403).

7. The support leg adjustment device of a sled according to claim 6, characterized in that: The lower end surface of the pressing block (504) is provided with a pressing groove.

8. The support leg adjustment device of a sled according to claim 7, characterized in that: A detection plate (505) is fixedly mounted on one side of the top pressure block (504); the detection plate (505) is arranged obliquely, and a detection sensor (506) is fixedly mounted on the detection plate (505).

9. The support leg adjustment device of a sled according to claim 8, characterized in that: A protective cover plate (308) is fixedly mounted on the conveying frame (301) at a position close to the conveying wheels (304); slots are provided on the protective cover plate (308) at positions corresponding to the respective conveying wheels (304); and the upper ends of the conveying wheels (304) are located above the protective cover plate (308) through the slots.

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