Automobile cross beam semi-finished product testing fixture

Abstract

The utility model discloses an automobile crossbeam semi-finished product detection tool, which relates to the technical field of automobile crossbeam semi-finished product detection and comprises a rack body, and the top of the rack body is fixedly connected with a plurality of supporting tables used for supporting crossbeam semi-finished products. A plurality of pressing clamp assemblies and pressing assemblies which are distributed in a staggered mode are arranged on one side of the supporting table; a plurality of detection assemblies and positioning assemblies are arranged on the side, close to the material pressing assembly, of the supporting table. A to-be-detected beam semi-finished product is placed on the multiple placing tables, the multiple placing tables play a role in supporting the beam semi-finished product, the C-shaped frames at the two ends of the placing tables play a role in limiting the beam semi-finished product, the beam semi-finished product is prevented from shaking on the placing tables, and the stability of the beam semi-finished product on the placing tables is guaranteed; the multiple pressing plates and the multiple pressing pieces are matched to further prevent the cross beam semi-finished product from displacing, the stability of the cross beam semi-finished product is guaranteed, and rubber blocks are arranged on the multiple pressing pieces, so that the pressing pieces cannot scratch the cross beam semi-finished product when pressing the cross beam semi-finished product.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-finished product detection of automobile cross beams, in particular to a semi-finished product detection tool for automobile cross beams. Background Art

[0002] The automobile cross beam is an important component in the automobile body structure. It is usually arranged horizontally in the body frame to enhance the rigidity of the body, disperse the force, support other components, and increase the overall stability and carrying capacity of the body frame. There are many types of automobile cross beams according to their position and function, such as front cross beams, rear cross beams, floor cross beams, etc.

[0003] Chinese patent announcement number CN 204421938 U discloses a vehicle crossbeam detection device, including a base, a clamping device, an operating table, a fixing part, a connecting part, a buckle, a pin, a rotating screw, a pad, a clamping device, a bottom plate, a baffle, a guide rail, a movable plate, a knob, a slide, a sliding seat and a telescopic column. The front and rear sides of the base are fixed with the operating table by the clamping device. The clamping device includes a fixing part, a connecting part, a buckle and a pin. The fixing part is installed on the base, and the connecting part is installed on the operating table corresponding to the fixing part. The fixing part is provided with a pin, and the buckle is installed on the pin. The left and right sides of the base are fixed with the operating table by rotating screws, and a pad is provided on the upper rear part of the operating table.

[0004] The above-mentioned automobile crossbeam detection device clamps and fixes the two ends of the crossbeam through two clamping devices, and then detects the mounting holes, threaded holes, etc. of the crossbeam through a telescopic column; however, the crossbeam is an important component in the automobile body structure, and it needs to be connected to multiple other body components. Therefore, there are multiple mounting holes and threaded holes on the crossbeam, and the above-mentioned automobile crossbeam detection device has only one telescopic column. Therefore, the telescopic column needs to be moved multiple times and the staff needs to manually adjust the position of the telescopic column frequently so that the telescopic column can complete the detection of all the mounting holes and threaded holes of the crossbeam, which greatly reduces the efficiency of the crossbeam additional testing work and also increases the workload of the staff. Utility Model Content

[0005] The purpose of the utility model is to provide a semi-finished product inspection tool for automobile cross beams, which is provided with multiple inspection components, and multiple inspection pins are provided on the multiple inspection components, so as to complete the inspection of all mounting holes and threaded holes of the cross beams at one time, so as to solve the technical problems raised by the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A semi-finished automobile beam inspection tool comprises a frame body, a plurality of support platforms for supporting the semi-finished cross beams are fixedly connected to the top of the frame body; a plurality of staggered pressure clamp assemblies and material pressing assemblies are arranged on one side of the support platform; a plurality of detection assemblies and positioning assemblies are arranged on one side of the support platform close to the material pressing assembly;

[0008] The pressure clamp assembly includes a base three, the top of which is fixedly connected to a rotating cylinder, and the output end of the rotating cylinder is fixedly connected to the bottom of the connecting seat three; the top of the connecting seat three is fixedly connected to a fixed seat by bolts, the lower end of the fixed seat is rotatably connected to a rotating member one, and a rubber sleeve is sleeved on one end of the rotating member one away from the fixed seat;

[0009] A connecting piece is fixedly connected to the inner side of the rotating part one, and the end of the connecting piece away from the rotating part one is fixedly connected to the rotating part two; one end of the rotating part two is rotationally connected to the fixed seat, and the other end is fixedly connected to the cross plate; the end of the cross plate away from the rotating part two is fixedly connected to a pressing piece.

[0010] As a further technical solution of the utility model, the frame body includes a workbench, the bottom of which is fixedly connected to the frame; universal wheels are installed at the four corners of the bottom of the frame; multiple buckles for fixing go and no-go gauges are evenly welded on both sides of the top of the workbench; the bottoms of multiple bases are fixedly connected to the top of the workbench by bolts.

[0011] As a further technical solution of the present utility model, the detection component includes a base, and the bottom of the base is fixedly connected to the top of the workbench by bolts; the top of the base is fixedly connected to a connecting seat by bolts, the connecting seat is concave in shape and one end of the inner side is rotatably connected to a rotating frame, and the other end is sleeved with a fixed shaft, and the rotating frame is provided with a circular hole for the fixed shaft to pass through; a connecting plate is provided at the end of the rotating frame away from the connecting seat.

[0012] As a further technical solution of the utility model, the middle of the connecting plate 1 is fixedly connected to the rotating frame 1 by a plum bolt; both ends of the connecting plate 1 are sleeved with detection pins, and the ends of multiple detection pins away from the semi-finished beam are fixedly connected with a spherical body; the end of the detection pin close to the spherical body is sleeved with a spring; one end of the spring is fixedly connected to the spherical body, and the other end is fixedly connected to the end of the connecting plate 1.

[0013] As a further technical solution of the utility model, the pressing assembly includes a base two, the bottom of which is fixedly connected to the top of the workbench by bolts; the top of the base two is fixedly connected to a connecting seat two by bolts, the upper end of the connecting seat two is rotatably connected to the rotating plate, and a handle one is provided on one side of the upper end of the connecting seat two, and a circular hole for the handle one to pass through is provided on the rotating plate; a pressing plate for pressing the semi-finished beam is fixedly connected to the end of the rotating plate away from the connecting seat two.

[0014] As a further technical solution of the utility model, the support platform includes a base four, the bottom of which is fixedly connected to the top of the workbench by bolts; the top of the base four is fixedly connected to the middle of the bottom of the placement table; and both ends of the placement table are fixedly connected with a C-shaped frame.

[0015] As a further technical solution of the utility model, the positioning assembly includes a base five, the bottom of which is fixedly connected to the top of the workbench by bolts; the top of the workbench is fixedly connected to a connecting seat four, and the upper end of the connecting seat four is rotatably connected to a rotating frame two; a handle two is provided on one side of the connecting seat four, and a circular hole for the handle two to pass through is provided on the rotating frame two.

[0016] As a further technical solution of the utility model, the end of the rotating frame 2 away from the connecting seat 4 is fixedly connected to a T-shaped plate, and the end of the T-shaped plate away from the rotating frame 2 is fixedly connected to the connecting plate 2; the end of the connecting plate 2 away from the T-shaped plate is sleeved with a positioning pin.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model places the semi-finished crossbeams to be inspected on a plurality of placement tables, and the plurality of placement tables play the role of supporting the semi-finished crossbeams. The C-shaped frames at both ends of the placement tables play the role of limiting the semi-finished crossbeams, preventing the semi-finished crossbeams from shaking on the placement tables, and ensuring the stability of the semi-finished crossbeams on the placement tables; then the plurality of rotating plates are rotated, so that the plurality of rotating plates drive the plurality of pressing plates to fit the semi-finished crossbeams, so that the plurality of pressing plates press the semi-finished crossbeams; the pressing parts press the semi-finished crossbeams by controlling the rotation of the first rotating part and the second rotating part; the cooperation of the plurality of pressing plates and the plurality of pressing parts can further prevent the semi-finished crossbeams from being displaced, and ensure the stability of the semi-finished crossbeams, and the plurality of pressing parts are provided with rubber blocks, so that the pressing parts will not scratch the semi-finished crossbeams when pressing the semi-finished crossbeams;

[0019] 2. In the utility model, multiple rotary cylinders can respectively control the rotation of multiple connecting seats, thereby controlling the rotation and position change of multiple pressing parts; by changing the positions of multiple pressing parts, the positions of the multiple pressing parts pressing the semi-finished crossbeams can be changed, so that the pressing clamp assembly can press the semi-finished crossbeams of different sizes, thereby increasing the scope of application of the inspection tool;

[0020] 3. In the utility model, after the semi-finished beam is fixed, the staff controls the rotating frame to rotate, so that the connecting plate drives multiple detection pins to move to the installation holes and threaded holes of the semi-finished beam, and the semi-finished beam is inspected by multiple detection pins and go / no-go gauges. The multiple detection pins move synchronously, which can increase the inspection efficiency of the semi-finished beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0022] Figure 2 This utility model Figure 1 Another perspective of the picture.

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the frame body in the utility model.

[0024] Figure 4 This utility model Figure 2 Schematic diagram of part of the structure.

[0025] Figure 5 It is a position relationship diagram of the detection component and the support platform in the utility model.

[0026] Figure 6 This utility model Figure 5 Another perspective of the picture.

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the medium-voltage clamp assembly of the utility model.

[0028] Figure 8 It is a three-dimensional structural schematic diagram of the material pressing component in the utility model.

[0029] Fig. 9 It is a three-dimensional structural schematic diagram of the positioning component in the utility model.

[0030] In the figure: 1-frame body, 2-detection component, 3-pressing component, 4-pressing clamp component, 5-support table, 6-crossbeam semi-finished product, 7-positioning component;

[0031] 11- workbench, 12- frame, 13- universal wheel, 14- buckle, 15- go / no-go gauge, 21- rotating frame 1, 22- connecting plate 1, 23- sphere, 24- spring, 25- detection pin, 26- plum bolt, 27- connecting seat 1, 28- fixed shaft, 29- base 1, 31- base 2, 32- connecting seat 2, 33- rotating plate, 34- pressure plate, 35- handle 1, 41- base 3 , 42-rotating cylinder, 43-connecting seat three, 44-fixed seat, 45-rotating part one, 46-rotating part two, 47-cross plate, 48-pressing part, 49-connecting part, 40-rubber sleeve, 51-placing table, 52-C-shaped frame, 53-base four, 71-base five, 72-connecting seat four, 73-rotating frame two, 74-T-shaped plate, 75-locating pin, 76-connecting plate two, 77-handle two. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-9 In the embodiment of the utility model, a semi-finished automobile beam inspection tool comprises a frame body 1, a plurality of support platforms 5 for supporting semi-finished cross beam products 6 are fixedly connected to the top of the frame body 1; a plurality of staggered pressure clamp assemblies 4 and pressing assemblies 3 are arranged on one side of the support platform 5; a plurality of detection assemblies 2 and positioning assemblies 7 are arranged on one side of the support platform 5 close to the pressing assemblies 3;

[0034] The pressure clamp assembly 4 includes a base 3 41, the top of which is fixedly connected to a rotating cylinder 42, and the output end of the rotating cylinder 42 is fixedly connected to the bottom of a connecting seat 3 43; the top of the connecting seat 3 43 is fixedly connected to a fixing seat 44 by bolts, the lower end of the fixing seat 44 is rotatably connected to a rotating member 1 45, and the end of the rotating member 1 45 away from the fixing seat 44 is sleeved with a rubber sleeve 40;

[0035] The inner side of the rotating member 1 45 is fixedly connected with a connecting member 49, and one end of the connecting member 49 away from the rotating member 1 45 is fixedly connected to the rotating member 2 46; one end of the rotating member 2 46 is rotatably connected to the fixed seat 44, and the other end is fixedly connected to the horizontal plate 47; the end of the horizontal plate 47 away from the rotating member 2 46 is fixedly connected with a pressing member 48;

[0036] The frame body 1 includes a workbench 11, the bottom of which is fixedly connected to a frame 12; universal wheels 13 are installed at the four corners of the bottom of the frame 12; multiple buckles 14 for fixing a go / no-go gauge 15 are evenly welded on both sides of the top of the workbench 11; the bottoms of multiple bases 41 are fixedly connected to the top of the workbench 11 by bolts.

[0037] By adopting the above technical scheme, the semi-finished beam 6 to be inspected is placed on multiple placement tables 51, and the multiple placement tables 51 play the role of supporting the semi-finished beam 6. The C-shaped frames 52 at both ends of the placement tables 51 play the role of limiting the semi-finished beam 6, preventing the semi-finished beam 6 from shaking on the placement tables 51, and ensuring the stability of the semi-finished beam 6 on the placement tables 51; then rotate the multiple rotating plates 33, so that the multiple rotating plates 33 drive the multiple pressing plates 34 to fit with the semi-finished beam 6, and let the multiple pressing plates 34 press the semi-finished beam 6; by controlling the rotation of the rotating part 1 45 and the rotating part 2 46, the pressing part 48 presses the semi-finished beam 6; the cooperation of the multiple pressing plates 34 and the multiple pressing parts 48 can further prevent the semi-finished beam 6 from being displaced, and ensure the stability of the semi-finished beam 6, and the multiple pressing parts 48 are provided with rubber blocks, so that the pressing parts 48 will not scratch the semi-finished beam 6 when pressing the semi-finished beam 6.

[0038] In this embodiment, the detection assembly 2 includes a base 29, and the bottom of the base 29 is fixedly connected to the top of the workbench 11 by bolts; the top of the base 29 is fixedly connected to a connecting seat 27 by bolts, and the connecting seat 27 is concave-shaped and has a rotating frame 21 rotatably connected to one end of the inner side, and a fixed shaft 28 sleeved on the other end, and a circular hole for the fixed shaft 28 to pass through is provided on the rotating frame 21; a connecting plate 22 is provided at one end of the rotating frame 21 away from the connecting seat 27;

[0039] The middle of the connecting plate 22 is fixedly connected to the rotating frame 21 by a plum bolt 26; both ends of the connecting plate 22 are sleeved with detection pins 25, and the ends of the multiple detection pins 25 away from the semi-finished beam 6 are fixedly connected with a spherical body 23; the end of the detection pin 25 close to the spherical body 23 is sleeved with a spring 24; one end of the spring 24 is fixedly connected to the spherical body 23, and the other end is fixedly connected to the end of the connecting plate 22;

[0040] The pressing assembly 3 includes a base 2 31, the bottom of which is fixedly connected to the top of the workbench 11 by bolts; the top of the base 2 31 is fixedly connected to a connecting seat 2 32 by bolts, the upper end of the connecting seat 2 32 is rotatably connected to a rotating plate 33, and a handle 1 35 is provided on one side of the upper end of the connecting seat 2 32, and a circular hole for the handle 1 35 to pass through is provided on the rotating plate 33; the end of the rotating plate 33 away from the connecting seat 2 32 is fixedly connected to a pressing plate 34 for pressing the semi-finished beam 6.

[0041] By adopting the above technical solution, multiple rotating cylinders 42 can respectively control the rotation of multiple connecting seats 43, and then control the rotation and position change of multiple pressing parts 48; by changing the positions of multiple pressing parts 48, the positions of multiple pressing parts 48 pressing the semi-finished beam 6 can be changed, so that the pressing clamp assembly 4 can press the semi-finished beams 6 of different sizes, thereby increasing the scope of application of the inspection fixture.

[0042] In this embodiment, the support platform 5 includes a base 53, the bottom of which is fixedly connected to the top of the workbench 11 by bolts; the top of the base 53 is fixedly connected to the middle of the bottom of the placement platform 51; both ends of the placement platform 51 are fixedly connected to a C-shaped frame 52;

[0043] The positioning assembly 7 includes a base 5 71, the bottom of which is fixedly connected to the top of the workbench 11 by bolts; the top of the workbench 11 is fixedly connected to a connecting seat 4 72, and the upper end of the connecting seat 4 72 is rotatably connected to a rotating frame 2 73; a handle 2 77 is provided on one side of the connecting seat 4 72, and a circular hole for the handle 2 77 to pass through is provided on the rotating frame 2 73;

[0044] The end of the second rotating frame 73 away from the connecting seat 4 72 is fixedly connected to a T-shaped plate 74, and the end of the T-shaped plate 74 away from the second rotating frame 73 is fixedly connected to the second connecting plate 76; the end of the second connecting plate 76 away from the T-shaped plate 74 is sleeved with a positioning pin 75.

[0045] By adopting the above technical solution, after the semi-finished beam 6 is fixed, the staff controls the rotating frame 21 to rotate, so that the connecting plate 22 drives multiple detection pins 25 to move to the installation holes and threaded holes of the semi-finished beam 6, and the semi-finished beam 6 is inspected by multiple detection pins 25 and go and no-go gauges. The multiple detection pins 25 move synchronously, which can increase the inspection efficiency of the semi-finished beam 6.

[0046] The working principle of the utility model is as follows: the semi-finished crossbeam 6 to be inspected is placed on a plurality of placement tables 51, and the plurality of placement tables 51 play the role of supporting the semi-finished crossbeam 6, and the C-shaped frames 52 at both ends of the placement tables 51 play the role of limiting the semi-finished crossbeam 6, preventing the semi-finished crossbeam 6 from shaking on the placement table 51, and ensuring the stability of the semi-finished crossbeam 6 on the placement table 51; then the plurality of rotating plates 33 are rotated, so that the plurality of rotating plates 33 drive the plurality of pressing plates 34 to fit with the semi-finished crossbeam 6, so that the plurality of pressing plates 34 press the semi-finished crossbeam 6; by controlling the rotation of the rotating member 1 45 and the rotating member 2 46, the pressing member 48 presses the semi-finished crossbeam 6; the cooperation of the plurality of pressing plates 34 and the plurality of pressing members 48 can further prevent the semi-finished crossbeam 6 from being displaced, and ensure the stability of the semi-finished crossbeam 6, and the plurality of pressing members 48 are provided with rubber blocks, so that the pressing members 48 will not scratch the semi-finished crossbeam 6 when pressing the semi-finished crossbeam 6;

[0047] The plurality of rotary cylinders 42 can respectively control the rotation of the plurality of connecting seats 43, thereby controlling the plurality of pressing members 48 to rotate and change their positions; by changing the positions of the plurality of pressing members 48, the positions of the plurality of pressing members 48 pressing the semi-finished crossbeam 6 can be changed, so that the pressing clamp assembly 4 can press the semi-finished crossbeam 6 of different sizes, thereby increasing the scope of application of the inspection tool;

[0048] After fixing the semi-finished beam 6, the staff controls the rotating frame 21 to rotate, so that the connecting plate 22 drives multiple detection pins 25 to move to the mounting holes and threaded holes of the semi-finished beam 6, and detects the semi-finished beam 6 through multiple detection pins 25 and go and no-go gauges. The synchronous movement of multiple detection pins 25 can increase the detection efficiency of the semi-finished beam 6.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A semi-finished product inspection tool for automobile cross beams, characterized by: The machine comprises a frame body (1), the top of which is fixedly connected with a plurality of support platforms (5) for supporting the semi-finished crossbeam product (6); one side of the support platform (5) is provided with a plurality of pressure clamp assemblies (4) and material pressing assemblies (3) which are arranged in a staggered manner; and a side of the support platform (5) close to the material pressing assemblies (3) is provided with a plurality of detection assemblies (2) and positioning assemblies (7); The pressure clamp assembly (4) comprises a base three (41), the top of which is fixedly connected to a rotating cylinder (42), and the output end of the rotating cylinder (42) is fixedly connected to the bottom of a connecting seat three (43); the top of the connecting seat three (43) is fixedly connected to a fixed seat (44) by bolts, the lower end of the fixed seat (44) is rotatably connected to a rotating member one (45), and the end of the rotating member one (45) away from the fixed seat (44) is sleeved with a rubber sleeve (40); A connecting member (49) is fixedly connected to the inner side of the rotating member 1 (45); one end of the connecting member (49) away from the rotating member 1 (45) is fixedly connected to the rotating member 2 (46); one end of the rotating member 2 (46) is rotatably connected to the fixed seat (44), and the other end is fixedly connected to the horizontal plate (47); and one end of the horizontal plate (47) away from the rotating member 2 (46) is fixedly connected to a pressing member (48).

2. The semi-finished automobile beam inspection fixture according to claim 1 is characterized in that: The frame body (1) comprises a workbench (11), the bottom of which is fixedly connected to a frame (12); universal wheels (13) are installed at the four corners of the bottom of the frame (12); a plurality of buckles (14) for fixing a go / no-go gauge (15) are evenly welded on both sides of the top of the workbench (11); and the bottoms of a plurality of bases (41) are fixedly connected to the top of the workbench (11) by bolts.

3. The semi-finished product inspection fixture for automobile cross beams according to claim 2 is characterized in that: The detection assembly (2) comprises a base (29), and the bottom of the base (29) is fixedly connected to the top of the workbench (11) by bolts; the top of the base (29) is fixedly connected to a connecting seat (27) by bolts, the connecting seat (27) is in a concave shape and one end of the inner side is rotatably connected to a rotating frame (21), and the other end is sleeved with a fixed shaft (28), and the rotating frame (21) is provided with a circular hole for the fixed shaft (28) to pass through; the end of the rotating frame (21) away from the connecting seat (27) is provided with a connecting plate (22).

4. The semi-finished automobile beam inspection fixture according to claim 3 is characterized in that: The middle of the connecting plate 1 (22) is fixedly connected to the rotating frame 1 (21) by means of a plum bolt (26); both ends of the connecting plate 1 (22) are sleeved with detection pins (25), and one end of the plurality of detection pins (25) away from the semi-finished crossbeam (6) is fixedly connected with a spherical body (23); one end of the detection pin (25) close to the spherical body (23) is sleeved with a spring (24); one end of the spring (24) is fixedly connected to the spherical body (23), and the other end is fixedly connected to the end of the connecting plate 1 (22).

5. The semi-finished automobile beam inspection fixture according to claim 4 is characterized in that: The pressing assembly (3) comprises a second base (31), the bottom of which is fixedly connected to the top of the workbench (11) by bolts; the top of the second base (31) is fixedly connected to a second connecting seat (32) by bolts, the upper end of the second connecting seat (32) is rotatably connected to a rotating plate (33), and a handle (35) is provided on one side of the upper end of the second connecting seat (32), and a circular hole for the handle (35) to pass through is provided on the rotating plate (33); and a pressing plate (34) for pressing the semi-finished crossbeam (6) is fixedly connected to one end of the rotating plate (33) away from the second connecting seat (32).

6. The semi-finished automobile beam inspection fixture according to claim 5, characterized in that: The support platform (5) comprises a base four (53), the bottom of which is fixedly connected to the top of the workbench (11) by bolts; the top of the base four (53) is fixedly connected to the middle of the bottom of the placement platform (51); and both ends of the placement platform (51) are fixedly connected with a C-shaped frame (52).

7. The semi-finished automobile beam inspection fixture according to claim 6, characterized in that: The positioning assembly (7) comprises a base five (71), the bottom of which is fixedly connected to the top of the workbench (11) by bolts; the top of the workbench (11) is fixedly connected to a connecting seat four (72), the upper end of which is rotatably connected to a rotating frame two (73); a handle two (77) is provided on one side of the connecting seat four (72), and a circular hole for the handle two (77) to pass through is provided on the rotating frame two (73).

8. The semi-finished product inspection fixture for automobile cross beams according to claim 7 is characterized in that: One end of the rotating frame 2 (73) away from the connecting seat 4 (72) is fixedly connected to a T-shaped plate (74), and one end of the T-shaped plate (74) away from the rotating frame 2 (73) is fixedly connected to the connecting plate 2 (76); one end of the connecting plate 2 (76) away from the T-shaped plate (74) is sleeved with a positioning pin (75).

Images