Tunnel furnace body moving assembly

Abstract

The invention relates to the technical field of tunnel furnace body transfer, and discloses a tunnel furnace body moving assembly which is characterized in that a fixing assembly is used for clamping and fixing a tunnel furnace body; the correcting assembly is arranged on the fixing assembly and used for adjusting the mounting position of the tunnel furnace body; the protection assembly is arranged on the fixing assembly, and the protection assembly is used for preventing the tunnel furnace body from falling off; an L-shaped supporting frame is pulled to drive a sliding ring to move on a sleeve, so that the sliding ring drives a connecting strip to be separated from the interior of a limiting groove of a limiting plate, the L-shaped supporting frame is overturned to enable one end of the L-shaped supporting frame to move to the position below a tunnel furnace body, and then the L-shaped supporting frame is pushed to move on the outer side of the sleeve; and the other connecting strip on the sliding ring is inserted into the limiting groove, the position of the L-shaped supporting frame can be limited, when the L-shaped clamp is loosened, the L-shaped supporting frame can support the tunnel furnace body, and damage caused by falling of the tunnel furnace body is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel furnace body transportation, and particularly to a tunnel furnace body moving assembly. Background Art

[0002] A tunnel furnace is an industrial equipment that realizes material heating, curing or drying through a continuous conveying system, and gets its name because its furnace body resembles a tunnel. Its core design concept is to upgrade traditional intermittent heating to assembly line operation, and it is widely used in fields such as food, electronics, ceramics, and automobile manufacturing.

[0003] Traditional methods for transporting tunnel furnace bodies usually rely on hoisting equipment or manual handling. Due to the large volume of traditional hoisting equipment, it is difficult to adapt to narrow workshop environments, and manual adjustment of the relative position between the furnace body and the conveying rack is required during installation, which is time-consuming. Moreover, during the hoisting process, once the fixture fails, the furnace body will directly fall, easily causing safety accidents and damage to the furnace body. Therefore, a tunnel furnace body moving assembly is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a tunnel furnace body moving assembly to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A tunnel furnace body moving assembly, including Two support frames, above both of the support frames are provided with U-shaped frames, and at the bottom of both of the support frames are installed universal wheels; An adjusting assembly, the adjusting assembly is installed between the support frame and the U-shaped frame, and the adjusting assembly is used for height adjustment of the tunnel furnace body; A fixing assembly, the fixing assembly is arranged between the two support frames, and the fixing assembly is used for clamping and fixing the tunnel furnace body; A correcting assembly, the correcting assembly is arranged on the fixing assembly, and the correcting assembly is used for adjusting the installation position of the tunnel furnace body; A protection assembly, the protection assembly is arranged on the fixing assembly, and the protection assembly is used to prevent the tunnel furnace body from falling.

[0006] Preferably, the above-mentioned fixing assembly includes two connecting columns, a lead screw and a moving block. The two connecting columns are fixedly connected to both ends of the two U-shaped frames. The lead screw is rotatably connected to the inside of the two connecting columns on one side. The moving block is sleeved on the outer sides of both ends of the lead screw and is located inside the connecting columns. A sliding groove is opened on the opposite side of the two connecting columns. One end of the moving block penetrates through the inside of the sliding groove. One end of the moving block is fixedly connected to an L-shaped clamp, and an anti-slip pad is installed on the inner side of the L-shaped clamp.

[0007] Preferably, the correction assembly includes two fixing columns, a rotating shaft and a rotating disc. The two fixing columns are fixedly connected to one side adjacent to the two connecting columns at one end. The rotating shaft is rotatably connected to the fixing columns. The rotating disc is fixedly connected to the bottom end of the rotating shaft. Two convex shafts are fixedly connected to the rotating disc. One end of each of the two second connecting rods is movably sleeved on the outer sides of the two convex shafts. One end of each of the two second connecting rods is hinged to a pull rod. The outer sides of the fixing columns are movably sleeved with two correction plates. One end of each of the two pull rods is fixedly connected to one side of the two correction plates respectively. A servo motor is installed on the top of the fixing column. The output shaft of the servo motor is fixedly connected to the top end of the rotating shaft.

[0008] Preferably, one end of the lead screw penetrates through one side of the fixing column. Braking motors are installed at both ends of one fixing column. The output shaft of the braking motor is fixedly connected to one end of the lead screw.

[0009] Preferably, the protection assembly includes a sleeve, two slip rings and an L-shaped support frame. The sleeve is fixedly connected between the two connecting columns on one side. The two slip rings are both movably sleeved on the outer side of the sleeve. The L-shaped support frame is fixedly connected to the outer side of the slip ring. Two connecting strips are fixedly connected to the outer side of the slip ring.

[0010] Preferably, limiting plates are fixedly connected to both ends of the inner sides of the two U-shaped frames on the outer side of the sleeve. A limiting groove is formed at one end of the limiting plate. The limiting groove matches the limiting plate.

[0011] Preferably, opposite threaded sections are provided on the lead screw. The moving block is threadedly connected to the outer side of the lead screw.

[0012] Preferably, the adjustment assembly includes two first support plates, a first fixed shaft and two first bearings. One end of each of the two first support plates is connected to the inner side end of the support frame through a shaft. The first fixed shaft is rotatably connected to the other ends of the two first support plates. The inner rings of the two first bearings are respectively fixedly connected to both ends of the outer side of the first fixed shaft. The two first bearings are movably connected to the inner side of the U-shaped frame. The inner side ends of the U-shaped frames are respectively connected to two second support plates through a shaft. One end of the second support plate is rotatably connected to a second fixed shaft. Both ends of the second fixed shaft are fixedly connected to the inner rings of the second bearings. The second bearings are movably connected to the inside of the support frame. A first connecting rod is movably connected between the first support plate and the second support plate. A driving assembly is arranged inside the support frame.

[0013] Preferably, the driving assembly comprises an electric push rod, one end of which is hinged to the inside of the support frame, and a push rod end of the electric push rod is hinged to the outside of the second fixed shaft.

[0014] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: 1. The present invention drives the slip ring to move on the sleeve by pulling the L-shaped support frame, so that the slip ring drives a connecting strip to disengage from the inside of the limiting groove of the limiting plate, and the L-shaped support frame is flipped to move one end of it to the bottom of the tunnel furnace body, and then the L-shaped support frame is pushed to move on the outside of the sleeve, so that the other connecting strip on the slip ring is inserted into the inside of the limiting groove, which can limit the position of the L-shaped support frame. When the L-shaped clamp is loose, the L-shaped support frame can support the tunnel furnace body to prevent the tunnel furnace body from falling and causing damage.

[0015] 2. The present invention drives the rotating shaft to rotate through the output shaft of the servo motor, and the rotating shaft drives the second connecting rod to move through the cam shaft. Then the second connecting rod pulls the correction plate to move on the outside of the fixed column through the pull rod, so that the correction plate contacts the outside of the conveying frame, and the position of the tunnel furnace body can be corrected so that the tunnel furnace body is located directly above the conveying frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the connecting column of the present invention; Figure 3 It is a schematic diagram of the structure of the turntable of the present invention; Figure 4 It is a schematic diagram of the structure of the limiting plate of the present invention; Figure 5 It is a schematic diagram of the bottom structure of the present invention; Figure 6 It is a schematic diagram of the top structure of the present invention; Figure 7 It is a schematic diagram of the L-shaped support frame structure of the present invention.

[0018] Description of the reference numerals: 1, support frame; 2, U-shaped frame; 31, first support plate; 32, first fixed shaft; 33, first bearing; 34, second support plate; 35, second fixed shaft; 36, second bearing; 37, first connecting rod; 38, electric push rod; 41, connecting column; 42, lead screw; 43, moving block; 44, chute; 45, L-shaped clamp; 46, anti-slip pad; 47, braking motor; 51, fixed column; 52, rotating shaft; 53, turntable; 54, convex shaft; 55, second connecting rod; 56, pull rod; 57, correction plate; 58, servo motor; 61, sleeve; 62, slip ring; 63, L-shaped support frame; 64, connecting bar; 65, limiting plate; 66, limiting groove; 7, universal wheel. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions that can be implemented in this application. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover.

[0021] Embodiment Please refer to Figure 1-7 , the present invention provides a technical solution: a moving assembly for a tunnel furnace body, including two support frames 1, U-shaped frames 2 are arranged above both support frames 1, and universal wheels 7 are installed at the bottoms of both support frames 1; an adjusting assembly, the adjusting assembly is installed between the support frame 1 and the U-shaped frame 2, and the adjusting assembly is used for adjusting the height of the tunnel furnace body; a fixing assembly, the fixing assembly is arranged between the two support frames 1, and the fixing assembly is used for clamping and fixing the tunnel furnace body; a correction assembly, the correction assembly is arranged on the fixing assembly, and the correction assembly is used for adjusting the installation position of the tunnel furnace body; a protection assembly, the protection assembly is arranged on the fixing assembly, and the protection assembly is used to prevent the tunnel furnace body from falling.

[0022] By setting the fixing component, the fixing of the tunnel furnace body can be quickly completed; the fixing component includes two connecting columns 41, a lead screw 42 and a moving block 43. The two connecting columns 41 are fixedly connected to both ends of the two U-shaped frames 2. The lead screw 42 is rotatably connected to the inside of the two connecting columns 41 on one side. The moving block 43 is sleeved on the outer sides of both ends of the lead screw 42 and is located inside the connecting column 41. Chutes 44 are provided on the opposite sides of the two connecting columns 41. One end of the moving block 43 penetrates into the inside of the chute 44. One end of the moving block 43 is fixedly connected to an L-shaped clamp 45. An anti-slip pad 46 is installed on the inner side of the L-shaped clamp 45. Opposite threaded sections are provided on the lead screw 42. The moving block 43 is threadedly connected to the outer side of the lead screw 42. By driving the two moving blocks 43 to move inside the connecting column 41 by the lead screw 42, at this time the L-shaped clamp 45 abuts against the outer side of the tunnel furnace body, and the tunnel furnace body can be fixed. Moreover, through the setting of the anti-slip pad 46, it can prevent the tunnel furnace body from falling during the lifting process.

[0023] By setting the adjusting component, the tunnel furnace body is placed on the conveying rack, so as to facilitate the precise installation of the tunnel furnace body and improve the installation effect of the tunnel furnace body. After the installation is completed, the L-shaped clamp 45 on the fixing component is disengaged from the outer side of the tunnel furnace body, and the U-shaped frame 2 is raised by the adjusting component, then the device can be pushed out of the outer side of the conveying rack. In order to be able to adjust the height of the fixed component to facilitate the transportation of the tunnel furnace body; the adjustment component includes two first support plates 31, a first fixed shaft 32 and two first bearings 33. One end of each of the two first support plates 31 is connected to the inner end of the support frame 1 by a shaft. The first fixed shaft 32 is rotatably connected to the other end of the two first support plates 31. The inner rings of the two first bearings 33 are respectively fixedly connected to the outer ends of the first fixed shaft 32. The two first bearings 33 are movably connected to the inside of the U-shaped frame 2. One end of the inside of the U-shaped frame 2 is connected to two second support plates 34 by a shaft. One end of the second support plate 34 is rotatably connected to a second fixed shaft 35. Both ends of the second fixed shaft 35 are fixedly connected to the inner ring of the second bearing 36. The second bearing 36 is movably connected to the inside of the support frame 1. A first connecting rod 37 is movably connected between the first support plate 31 and the second support plate 34. A driving component is arranged inside the support frame 1. The driving component includes an electric push rod 38. One end of the electric push rod 38 is hinged to the inside of the support frame 1. The push rod end of the electric push rod 38 is hinged to the outside of the second fixed shaft 35. When the tunnel furnace body is transported, the second bearing 36 at both ends of the second fixed shaft 35 is driven by the push rod of the electric push rod 38 to move inside the support frame 1. At this time, one end of the second support plate 34 moves and makes one end of the first support plate 31 drive the first bearing 33 at both ends of the first fixed shaft 32 to move inside the U-shaped frame 2, so that the U-shaped frame 2 drives the connecting column 41 to move upward, thereby driving the tunnel furnace body to move upward.

[0024] By setting the correction component, the position of the tunnel furnace body can be adjusted to facilitate the rapid installation of the tunnel furnace body; the correction component includes two fixed columns 51, a rotating shaft 52 and a turntable 53. The two fixed columns 51 are fixedly connected to one side adjacent to the two connecting columns 41 at one end. The rotating shaft 52 is rotatably connected to the fixed column 51. The turntable 53 is fixedly connected to the bottom end of the rotating shaft 52. Two convex shafts 54 are fixedly connected to the turntable 53. One end of each of the two second connecting rods 55 is movably sleeved on the outside of the two convex shafts 54. One end of each of the two second connecting rods 55 is hinged to a pull rod 56. The outside of the fixed column 51 is movably sleeved with two correction plates 57. One end of each of the two pull rods 56 is fixedly connected to one side of the two correction plates 57. A servo motor 58 is installed at the top of the fixed column 51. The output shaft of the servo motor 58 is fixedly connected to the top end of the rotating shaft 52. The rotating shaft 52 is driven to rotate by the output shaft of the servo motor 58. The rotating shaft 52 drives the second connecting rod 55 to move through the convex shaft 54. Then the second connecting rod 55 pulls the correction plate 57 to move on the outside of the fixed column 51 through the pull rod 56, so that the correction plate 57 abuts against the outside of the conveying frame, and the position of the tunnel furnace body can be corrected, so that the tunnel furnace body is located directly above the conveying frame; One end of the screw rod 42 passes through one side of the fixed column 51, and brake motors 47 are installed at both ends of a fixed column 51. The output shaft of the brake motor 47 is fixedly connected to one end of the screw rod 42. By moving the device to the top of the tunnel furnace body, the tunnel furnace body is located between the two support frames 1. At this time, the output shaft of the brake motor 47 drives the screw rod 42 to rotate, thereby driving the L-shaped clamp 45 to move and fix the tunnel furnace body.

[0025] By setting up a protection component, it is possible to provide protection for the tunnel furnace body during the process, prevent the tunnel furnace body from falling and causing damage, and avoid safety accidents; the protection component includes a sleeve 61, two slip rings 62 and an L-shaped support frame 63, the sleeve 61 is fixedly connected between two connecting columns 41 on one side, the two slip rings 62 are movably sleeved on the outside of the sleeve 61, the L-shaped support frame 63 is fixedly connected to the outside of the slip ring 62, the outside of the slip ring 62 is fixedly connected with two connecting strips 64, the inner ends of the two U-shaped frames 2 are located on the outside of the sleeve 61 and are fixedly connected to the limit plate 65, one end of the limit plate 65 is opened There is a limiting groove 66, and the limiting groove 66 matches the limiting plate 65; the slip ring 62 is driven to move on the sleeve 61 by pulling the L-shaped support frame 63, so that the slip ring 62 drives a connecting strip 64 to disengage from the limiting groove 66 of the limiting plate 65, and the L-shaped support frame 63 is flipped to move one end to the bottom of the tunnel furnace body, and then the L-shaped support frame 63 is pushed to move on the outside of the sleeve 61, so that the other connecting strip 64 on the slip ring 62 is inserted into the limiting groove 66, which can limit the position of the L-shaped support frame 63. When the L-shaped clamp 45 becomes loose, the L-shaped support frame 63 can support the tunnel furnace body.

[0026] Working principle or structural principle, when it is necessary to transfer and install the small tunnel furnace body, the device is moved to the top of the tunnel furnace body. At this time, the tunnel furnace body is located between the two support frames 1. At this time, the brake motor 47 is started by controlling the switch group, and the output shaft of the brake motor 47 drives the screw rod 42 to rotate, so that the screw rod 42 drives the two moving blocks 43 to move inside the connecting column 41. At this time, the L-shaped clamp 45 is in contact with the outside of the tunnel furnace body, which can fix the tunnel furnace body, and the anti-slip pad 46 can be set to prevent the tunnel furnace body from falling during the lifting process; When transporting the tunnel furnace body, the push rod of the electric push rod 38 is reset by controlling the switch group. The push rod of the electric push rod 38 drives the second bearings 36 at both ends of the second fixed shaft 35 to move inside the support frame 1. At this time, one end of the second support plate 34 moves, causing one end of the first support plate 31 to drive the first bearings 33 at both ends of the first fixed shaft 32 to move inside the U-shaped frame 2, enabling the U-shaped frame 2 to drive the connecting column 41 to move upward, thereby driving the tunnel furnace body to move upward, facilitating the transportation of the tunnel furnace body. Before transportation, by pulling the L-shaped support frame 63, the slip ring 62 is driven to move on the sleeve 61, causing the slip ring 62 to drive a connecting bar 64 to disengage from the inside of the limiting groove 66 of the limiting plate 65. The L-shaped support frame 63 is flipped so that one end of it moves below the tunnel furnace body, and then the L-shaped support frame 63 is pushed to move outside the sleeve 61, causing another connecting bar 64 on the slip ring 62 to be inserted into the inside of the limiting groove 66, which can limit the position of the L-shaped support frame 63. When the L-shaped fixture 45 becomes loose, the L-shaped support frame 63 can support the tunnel furnace body to prevent the tunnel furnace body from falling and being damaged. When the tunnel furnace body needs to be installed on the conveyor frame, the device moves through the universal wheels 7 so that it moves to the outside of the conveyor frame. At this time, the tunnel furnace body moves above the conveyor frame. During installation, the servo motor 58 is started by controlling the switch group. The output shaft of the servo motor 58 drives the rotating shaft 52 to rotate. The rotating shaft 52 drives the second connecting rod 55 to move through the convex shaft 54. Then, the second connecting rod 55 pulls the correction plate 57 to move outside the fixed column 51 through the pull rod 56, causing the correction plate 57 to abut against the outside of the conveyor frame, which can correct the position of the tunnel furnace body so that the tunnel furnace body is directly above the conveyor frame. Then, by pulling and flipping the L-shaped support frame 63, the L-shaped support frame 63 is disengaged from below the tunnel furnace body, and then through the adjustment component, the tunnel furnace body is placed on the conveyor frame, facilitating the precise installation of the tunnel furnace body and improving the installation effect of the tunnel furnace body. After installation is completed, the L-shaped fixture 45 on the fixing component is disengaged from the outside of the tunnel furnace body, and the U-shaped frame 2 is raised through the adjustment component, and then the device can be pushed away from the outside of the conveyor frame.

[0027] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A moving component of a tunnel furnace body, characterized in that: including two support frames (1), U-shaped frames (2) are arranged above both of the two support frames (1), and universal wheels (7) are installed at the bottoms of both of the two support frames (1); an adjusting assembly, which is installed between the support frame (1) and the U-shaped frame (2), and the adjusting assembly is used for adjusting the height of the tunnel furnace body; a fixing assembly, which is arranged between the two support frames (1), and the fixing assembly is used for clamping and fixing the tunnel furnace body; a correcting assembly, which is arranged on the fixing assembly, and the correcting assembly is used for adjusting the installation position of the tunnel furnace body; a protection assembly, which is arranged on the fixing assembly, and the protection assembly is used for preventing the tunnel furnace body from falling.

2. The tunnel furnace body moving component according to claim 1, characterized in that: The fixing assembly includes two connecting columns (41), a lead screw (42) and a moving block (43). The two connecting columns (41) are fixedly connected to both ends of the two U-shaped frames (2). The lead screw (42) is rotatably connected inside the two connecting columns (41) on one side. The moving block (43) is sleeved on the outer sides of both ends of the lead screw (42) and is located inside the connecting columns (41). A chute (44) is opened on each of the opposite sides of the two connecting columns (41). One end of the moving block (43) penetrates inside the chute (44). One end of the moving block (43) is fixedly connected to an L-shaped clamp (45), and an anti-slip pad (46) is installed inside the L-shaped clamp (45).

3. The moving component of the tunnel furnace body according to claim 2, wherein: The correcting assembly includes two fixing columns (51), a rotating shaft (52) and a turntable (53). The two fixing columns (51) are fixedly connected to the adjacent sides of the two connecting columns (41) at one end. The rotating shaft (52) is rotatably connected to the fixing column (51). The turntable (53) is fixedly connected to the bottom end of the rotating shaft (52). Two convex shafts (54) are fixedly connected to the turntable (53). One ends of two second connecting rods (55) are movably sleeved on the outer sides of the two convex shafts (54). One end of each of the two second connecting rods (55) is hinged to a pull rod (56). Two correcting plates (57) are movably sleeved on the outer sides of the fixing columns (51). One ends of the two pull rods (56) are respectively fixedly connected to one side of the two correcting plates (57). A servo motor (58) is installed on the top of the fixing column (51), and the output shaft of the servo motor (58) is fixedly connected to the top end of the rotating shaft (52).

4. The tunnel furnace body moving assembly according to claim 3, characterized in that: One end of the lead screw (42) penetrates through one side of the fixing column (51). Brake motors (47) are installed at both ends of one of the fixing columns (51), and the output shafts of the brake motors (47) are fixedly connected to one end of the lead screw (42).

5. The moving assembly of a tunnel furnace body according to claim 1, characterized in that: The protection component includes a sleeve (61), two slip rings (62) and an L-shaped support frame (63). The sleeve (61) is fixedly connected between two of the connecting columns (41) on one side. The two slip rings (62) are both movably sleeved on the outer side of the sleeve (61). The L-shaped support frame (63) is fixedly connected to the outer side of the slip ring (62). Two connecting bars (64) are fixedly connected to the outer side of the slip ring (62).

6. The tunnel furnace body moving component according to claim 5, characterized in that: At both inner ends of the two U-shaped frames (2) located on the outer side of the sleeve (61), limit plates (65) are fixedly connected. A limit groove (66) is formed at one end of the limit plate (65), and the limit groove (66) matches the limit plate (65).

7. The tunnel furnace body moving assembly according to claim 2, characterized in that: The lead screw (42) is provided with opposite thread segments, and the moving block (43) is threadedly connected to the outer side of the lead screw (42).

8. The tunnel furnace body moving assembly according to claim 1, wherein: The adjusting component includes two first support plates (31), a first fixed shaft (32) and two first bearings (33). One ends of the two first support plates (31) are respectively connected to the inner ends of the support frame (1) by shafts. The first fixed shaft (32) is rotatably connected to the other ends of the two first support plates (31). The inner rings of the two first bearings (33) are respectively fixedly connected to the outer ends of the first fixed shaft (32). The two first bearings (33) are movably connected to the inner side of the U-shaped frame (2). At both inner ends of the U-shaped frame (2), two second support plates (34) are respectively connected by shafts. One end of the second support plate (34) is rotatably connected to a second fixed shaft (35). Both ends of the second fixed shaft (35) are fixedly connected to the inner ring of the second bearing (36). The second bearing (36) is movably connected to the inside of the support frame (1). A first connecting rod (37) is movably connected between the first support plate (31) and the second support plate (34). A driving component is arranged inside the support frame (1).

9. The tunnel furnace body moving assembly according to claim 8, wherein: The driving component includes an electric push rod (38). One end of the electric push rod (38) is hinged to the inside of the support frame (1), and the push rod end of the electric push rod (38) is hinged to the outer side of the second fixed shaft (35).

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