An anti-tilt support device for an aerial work platform

Abstract

The present invention relates to the technical field of support devices, and discloses an anti-tilt support device for an aerial work platform, including a base and an aerial work platform body, wherein the aerial work platform body is arranged on the upper surface of the base, and the lower surface of the base is symmetrically provided with two groups of rollers in pairs. When the ground where the support foot is located collapses, the spline sleeve and the T-shaped sleeve will move downward, and at this time, the warning light will also move downward, and the conductive contact protrusion on the warning light will be separated from the positive and negative electrodes on the conductive block. At this time, the warning light will not light up. Through this device, when the ground where the support foot is located collapses, the operator can be reminded in the first time to prevent the aerial work platform body from losing balance and tilting and collapsing.

Description

Technical Field

[0001] The invention relates to the technical field of supporting devices, and in particular to an anti-tilt supporting device for an aerial work platform. Background Art

[0002] Aerial work platforms are products that serve various industries for aerial work, equipment installation, maintenance and other mobile aerial work. Aerial work platform related products mainly include six categories: scissor-type aerial work platforms, vehicle-mounted aerial work platforms, articulated boom aerial work platforms, self-propelled aerial work platforms, aluminum alloy aerial work platforms, and cylinder-type aerial work platforms.

[0003] When the existing aerial work platform is in use, multiple support arms are deployed to support the work platform to prevent tilting. Because the aerial work platform sometimes operates on a soft ground, the foundation will slowly collapse when it is subjected to a large gravity. The existing aerial work platform does not have a device to detect the ground collapse of the support arms, which can easily cause the aerial work platform to lose balance and tilt and collapse. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an anti-tilt support device for an aerial work platform.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The anti-tilt support device of an aerial work platform comprises a base and an aerial work platform body, the aerial work platform body is arranged on the upper surface of the base, and two groups of rollers are symmetrically arranged in a group of two on the lower surface of the base, and a group of fixing blocks are symmetrically arranged in a group of two on the outer surfaces of opposite sides of the base, and openings are arranged on the outer surfaces of two fixing blocks in a group, and a support arm is rotatably installed between the inner walls of the openings, and a circular hole on the upper surface of the support arm away from one end of the base, and a T-shaped sleeve is slidably installed on the inner wall of the circular hole, and a spline groove is provided on the lower surface of the support arm away from one end of the base, and a spline sleeve is slidably installed on the inner wall of the spline groove, and the bottom end of the T-shaped sleeve passes through the bottom wall of the circular hole and is fixedly installed with the top end of the spline sleeve, the T-shaped sleeve and the spline sleeve are arranged on the same axis, and the outer diameter of the spline sleeve is larger than the outer diameter of the bottom end of the T-shaped sleeve.

[0007] As a further solution of the present invention, the bottom end of the spline sleeve passes through the lower surface of the support arm and is fixedly installed with a connecting block, the upper surface of the connecting block is fixedly installed with a connecting column, the lower surface of the support arm is fixedly installed with a second cylinder, the inner wall of the second cylinder is slidably installed with a second piston, and the top end of the connecting column is fixedly installed with the lower surface of the second piston.

[0008] As a further solution of the present invention, a circular groove is penetrated through the upper surface of the base, and four support blocks are fixedly installed at equal distances between the inner walls of the circular groove near the bottom end, and a first cylinder is fixedly installed on the upper surfaces of the four support blocks, a first piston is slidably installed on the inner wall of the first cylinder, a sliding column is fixedly installed on the upper surface of the first piston, and a warning light is fixedly installed on the top end of the sliding column that penetrates through the top end of the first cylinder.

[0009] As a further solution of the present invention, two conductive contact protrusions are provided on the circumferential outer surface of the warning light, four conductive blocks are fixedly installed at equal intervals between the inner walls of the circular groove near the top, the outer surfaces of the conductive blocks are abutted against the ends of the conductive contact protrusions, a first pipe joint is fixedly installed on the bottom end of the first cylinder through the lower surface of the support block, a second pipe joint is fixedly installed on the circumferential outer surface of the second cylinder near the top, a conduit is connected between the first pipe joint and the second pipe joint, and the first cylinder is connected to the interior of the second cylinder through the first pipe joint, the conduit and the second pipe joint.

[0010] As a further solution of the present invention, a screw is inserted into the interior of the spline sleeve, and the screw is threadedly connected to the spline sleeve. The top end of the screw passes through a T-shaped sleeve and is fixedly installed with a handwheel, and the bottom end of the screw passes through the spline sleeve and is fixedly installed with a ball head, and a support foot is slidably installed on the outer surface of the ball head.

[0011] As a further solution of the present invention, a through hole is penetrated through the upper surface of the fixing block, and a socket is penetrated through the outer surface of the support arm near the through hole. The socket is arranged with the same shape as the through hole, and the socket and the through hole are arranged on the same axis. T-shaped pins are inserted into the socket and the through hole, and a limiting protrusion is arranged on the circumferential outer surface of the T-shaped pin, and the inner walls of the socket and the through hole are provided with limiting grooves matching the limiting protrusions.

[0012] As a further solution of the present invention, a card slot is provided on the outer surface of the circumference of the T-shaped bolt near the top end, and the card slot is arranged on the outer surface of the T-shaped bolt near the T-shaped sleeve, and a mounting groove is provided on the upper surface of the support arm, and a sliding sheet is slidably mounted on the inner wall of the mounting groove, and a sliding rod is inserted into the interior of the sliding sheet, and the sliding rod is fixedly mounted on the sliding sheet, and one end of the sliding rod near the T-shaped bolt passes through the inner wall of the mounting groove and is fixedly mounted on the top block, and a card block matching the card slot is provided on the outer surface of the top block, and the bottom wall of the card slot and the lower surface of the top block are located in the same plane, and a chamfer is provided on the outer surface of the circumference of the T-shaped sleeve near the top end, and one end of the sliding rod near the T-shaped sleeve passes through the inner wall of the mounting groove to form an oblique angle matching the chamfer, and a spring is sleeved on the outer surface of the sliding rod, and the spring is arranged between the sliding sheet and the inner wall of the mounting groove near the T-shaped bolt.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. When the ground where the supporting foot is located collapses, the spline sleeve and the T-shaped sleeve will move downward. At this time, the warning light will also move downward, and the conductive contact protrusion on the warning light will separate from the positive and negative electrodes on the conductive block. At this time, the warning light will not light up. This device can remind the operator at the first time when the ground where the supporting foot is located collapses, so as to prevent the aerial work platform body from losing balance and tilting and collapsing.

[0015] 2. By sliding the card block into the card slot, the up and down sliding of the T-pin can be restricted, preventing the operator from pulling out the T-pin carelessly, causing the support arm to loosen and the aerial work platform body to tilt. At the same time, it prevents the operator from pulling out the T-pin without completely retracting the support foot, causing the support arm to loosen and tilt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-tilt support device for an aerial work platform proposed by the present invention;

[0017] Figure 2 A schematic diagram of the top view of the anti-tilt support device of an aerial work platform proposed by the present invention;

[0018] Figure 3 This is a bottom-up structural schematic diagram of an anti-tilt support device for an aerial work platform proposed by the present invention;

[0019] Figure 4 A schematic diagram of a fixing block of an anti-tilt support device for an aerial work platform proposed by the present invention;

[0020] Figure 5 A schematic diagram of a support foot of an anti-tilt support device for an aerial work platform proposed by the present invention;

[0021] Figure 6 A schematic diagram of a support arm of an anti-tilt support device for an aerial work platform proposed by the present invention;

[0022] Figure 7 A schematic diagram of a warning light of an anti-tilt support device of an aerial work platform proposed by the present invention;

[0023] Figure 8 A schematic diagram of a T-shaped latch of an anti-tilt support device for an aerial work platform proposed by the present invention;

[0024] Fig. 9 for Figure 5 A partial enlarged schematic diagram in the middle;

[0025] Fig.10 for Figure 2A partial enlarged schematic diagram of point B in the middle.

[0026] In the figure: 1. base; 2. roller; 3. aerial work platform body; 4. fixing block; 5. support arm; 6. hand wheel; 7. support foot; 8. screw; 801. ball head; 9. T-type pin; 901. limiting protrusion; 902. slot; 10. round slot; 11. conductive block; 12. support block; 13. warning light; 14. first cylinder; 15. first piston; 16. sliding column; 17. conductive contact protrusion; 18. socket; 1801. limiting slot; 19. mounting slot; 20. sliding piece; 21. spring; 22. top block; 23. T-type sleeve; 2301. chamfer; 24. spline sleeve; 2401. spline slot; 25. slide rod; 26. second cylinder; 27. second piston; 28. catheter. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Reference Figure 1-Figure 10, an anti-tilt support device for an aerial work platform, comprising a base 1 and an aerial work platform body 3, the aerial work platform body 3 is arranged on the upper surface of the base 1, and two groups of rollers 2 are symmetrically arranged in a group of two on the lower surface of the base 1, and the operator drives the aerial work platform body 3 to move to the working position through the rollers 2, and the outer surfaces of the two opposite sides of the base 1 are symmetrically arranged in a group of two, and the outer surfaces of a group of two fixed blocks 4 are both provided with openings, and a support arm 5 is rotatably installed between the inner walls of the openings, and the support arm 5 is away from the circular hole on the upper surface of one end of the base 1, and a T-shaped sleeve 23 is slidably installed on the inner wall of the circular hole, and the support A spline groove 2401 is provided on the lower surface of the support arm 5 away from the base 1, and a spline sleeve 24 is slidably installed on the inner wall of the spline groove 2401. The bottom end of the T-shaped sleeve 23 passes through the bottom wall of the circular hole and is fixedly installed on the top of the spline sleeve 24. The T-shaped sleeve 23 and the spline sleeve 24 are arranged on the same axis. The outer diameter of the spline sleeve 24 is larger than the outer diameter of the bottom end of the T-shaped sleeve 23. The bottom end of the spline sleeve 24 passes through the lower surface of the support arm 5 and is fixedly installed with a connecting block. The upper surface of the connecting block is fixedly installed with a connecting column. The lower surface of the support arm 5 is fixedly installed with a second cylinder 26, and the inner wall of the second cylinder 26 is slidably installed with a second movable The top of the connecting column is fixedly installed with the lower surface of the second piston 27, the upper surface of the base 1 is penetrated with a circular groove 10, and four support blocks 12 are fixedly installed between the inner walls of the circular groove 10 near the bottom end, and the upper surfaces of the four support blocks 12 are fixedly installed with the first cylinder 14, and the first piston 15 is slidably installed on the inner wall of the first cylinder 14. The upper surface of the first piston 15 is fixedly installed with a sliding column 16, and the top of the sliding column 16 penetrates the top of the first cylinder 14 and is fixedly installed with a warning light 13. The outer surface of the circumference of the warning light 13 is provided with two conductive contact protrusions 17, and the inner walls of the circular groove 10 near the top are fixedly installed equidistantly. Four conductive blocks 11 are fixedly installed, and the outer surface of the conductive block 11 is abutted against the end of the conductive contact protrusion 17. The bottom end of the first cylinder 14 passes through the lower surface of the support block 12 and is fixedly installed with a first pipe joint. The circumferential outer surface of the second cylinder 26 near the top is fixedly installed with a second pipe joint. A conduit 28 is connected between the first pipe joint and the second pipe joint. The first cylinder 14 is connected to the interior of the second cylinder 26 through the first pipe joint, the conduit 28 and the second pipe joint. When in use, the interiors of the first cylinder 14, the first pipe joint, the second cylinder 26, the conduit 28 and the second pipe joint are filled with hydraulic oil.

[0031] The first piston 15 is lifted up by hydraulic oil, and the first piston 15 drives the warning light 13 to rise through the sliding column 16. When the warning light 13 rises, it will drive the conductive contact protrusion 17 to move upward, so that the conductive contact protrusion 17 contacts the outer surface of the conductive block 11. The outer surface of the conductive block 11 is provided with positive and negative power supply electrodes matching the conductive contact protrusion 17. When the positive and negative electrodes are in contact with the two conductive contact protrusions 17 respectively, at this time, current passes through the inside of the warning light 13, and the warning light 13 is lit by the current. When the ground of the supporting foot 7 collapses, the spline sleeve 24 and the T-shaped sleeve 23 will move downward. At this time, the warning light 13 will also move downward, and the conductive contact protrusion 17 on the warning light 13 will be separated from the positive and negative electrodes on the conductive block 11. At this time, the warning light 13 will not light up. Through this device, when the ground where the supporting foot 7 is located collapses, the operator can be reminded at the first time to prevent the aerial work platform body 3 from losing balance and tilting and collapsing.

[0032] In this embodiment, a screw rod 8 is inserted into the interior of the spline sleeve 24, and the screw rod 8 is threadedly connected to the spline sleeve 24. The top end of the screw rod 8 passes through the T-shaped sleeve 23 and is fixedly installed with a handwheel 6. The bottom end of the screw rod 8 passes through the spline sleeve 24 and is fixedly installed with a ball head 801. The outer surface of the ball head 801 is slidably installed with a support foot 7. The ball head 801 and the support foot 7 are connected so that the position of the support foot 7 can be adjusted at will.

[0033] The hand wheel 6 is manually rotated to drive the screw rod 8 to rotate, and the screw rod 8 is threadedly connected with the spline sleeve 24, so that the screw rod 8 moves downward by rotating, and the screw rod 8 drives the support foot 7 to contact the ground.

[0034] In this embodiment, a through hole is formed on the upper surface of the fixing block 4, and a socket 18 is formed on the outer surface of the support arm 5 near the through hole. The socket 18 is arranged in the same shape as the through hole, and the socket 18 and the through hole are arranged on the same axis. A T-shaped pin 9 is inserted into the inside of the socket 18 and the through hole, and a limiting protrusion 901 is provided on the circumferential outer surface of the T-shaped pin 9. A limiting groove 1801 matching the limiting protrusion 901 is provided on the inner wall of the socket 18 and the through hole. A clamping groove 902 is formed on the circumferential outer surface of the T-shaped pin 9 near the top, and the clamping groove 902 is arranged on the outer surface of the T-shaped pin 9 near the T-shaped sleeve 23. An installation groove 19 is formed on the upper surface of the support arm 5, and the inner wall of the installation groove 19 is slidably mounted on the inner wall of the installation groove 19. A slide 20 is installed, and a slide rod 25 is inserted into the interior of the slide 20. The slide rod 25 is fixedly installed with the slide 20. One end of the slide rod 25 close to the T-shaped pin 9 passes through the inner wall of the mounting groove 19 and is fixedly installed with a top block 22. The outer surface of the top block 22 is provided with a card block matching the card slot 902. The bottom wall of the card slot 902 and the lower surface of the top block 22 are located in the same plane. A chamfer 2301 is provided on the circumferential outer surface of the T-shaped sleeve 23 close to the top. One end of the slide rod 25 close to the T-shaped sleeve 23 passes through the inner wall of the mounting groove 19 and is provided with an oblique angle matching the chamfer 2301. A spring 21 is sleeved on the outer surface of the slide rod 25. The spring 21 is arranged between the slide 20 and the inner wall of the mounting groove 19 close to the T-shaped pin 9.

[0035] When the screw 8 lifts the spline sleeve 24 and the T-shaped sleeve 23, the T-shaped sleeve 23 drives the slide bar 25 to slide close to the T-shaped pin 9 through the chamfer 2301 and the bevel at the end of the slide bar 25, and the slide bar 25 drives the block to slide into the inside of the slot 902 through the top block 22. At this time, when the T-shaped pin 9 is pulled outward, the block slides into the slot 902 to limit the up and down sliding of the T-shaped pin 9, thereby preventing the operator from pulling out the T-shaped pin 9 carelessly, causing the support arm 5 to loosen and the aerial work platform body 3 to tilt. At the same time, it prevents the operator from pulling out the T-shaped pin 9 when the support foot 7 is not completely retracted, causing the support arm 5 to loosen and tilt.

[0036] It should be noted that when the present invention is in use, the operator drives the aerial work platform body 3 to move to the working position through the roller 2, and then manually unfolds the four support arms 5. The unfolded positions of the four support arms 5 are flush with the inner wall of the opening. After unfolding the support arms 5, the operator inserts the T-shaped latch 9 into the through hole and the inside of the socket 18 in sequence, and aligns the limiting protrusion 901 with the limiting groove 1801 during insertion, so as to prevent the T-shaped latch 9 from rotating inside the socket 18 through the limiting protrusion 901 and the limiting groove 1801;

[0037] The rotation of the support arm 5 is limited by the T-shaped latch 9 to prevent the center of gravity of the aerial work platform body 3 from tilting. When the position of the support arm 5 is limited, the hand wheel 6 is manually rotated to drive the screw 8 to rotate. The screw 8 is threadedly connected with the spline sleeve 24 so that the screw 8 moves downward by rotation. The screw 8 drives the support foot 7 to contact the ground. At this time, the screw 8 is continued to be rotated so that the screw 8 lifts the spline sleeve 24 and the T-shaped sleeve 23. When the T-shaped sleeve 23 is fully pushed into place, the screw 8 is continued to be rotated for several turns so that the four rollers 2 leave the ground for a distance. At this time, the aerial work platform body 3 is completely lifted up by the four supporting feet 7 to limit the position of the aerial work platform body 3, thereby balancing the aerial work platform body 3.

[0038] When the screw 8 lifts the spline sleeve 24 and the T-shaped sleeve 23, it will drive the second piston 27 to compress the hydraulic oil inside the second cylinder 26. The hydraulic oil enters the first cylinder 14 along the guide tube 28, and the first piston 15 is lifted by the hydraulic oil. The first piston 15 drives the warning light 13 to rise through the sliding column 16. When the warning light 13 rises, it will drive the conductive contact protrusion 17 to move upward, so that the conductive contact protrusion 17 contacts the outer surface of the conductive block 11. The outer surface of the conductive block 11 is provided with positive and negative power supply electrodes matching the conductive contact protrusion 17. When the positive and negative electrodes When the two conductive contact protrusions 17 are contacted respectively, at this time, current flows through the inside of the warning light 13, and the warning light 13 is lit by the current. When the ground of the support foot 7 collapses, the spline sleeve 24 and the T-shaped sleeve 23 will move downward. At this time, the warning light 13 will also move downward, and the conductive contact protrusion 17 on the warning light 13 will be separated from the positive and negative electrodes on the conductive block 11. At this time, the warning light 13 will not light up. Through this device, when the ground where the support foot 7 is located collapses, the operator can be reminded in the first time to prevent the aerial work platform body 3 from losing balance and tilting and collapsing;

[0039] When the screw 8 lifts the spline sleeve 24 and the T-shaped sleeve 23, the T-shaped sleeve 23 drives the slide bar 25 to slide close to the T-shaped pin 9 through the chamfer 2301 and the bevel at the end of the slide bar 25, and the slide bar 25 drives the block to slide into the inside of the slot 902 through the top block 22. At this time, when the T-shaped pin 9 is pulled outward, the block slides into the slot 902 to limit the up and down sliding of the T-shaped pin 9, thereby preventing the operator from pulling out the T-shaped pin 9 carelessly, causing the support arm 5 to loosen and the aerial work platform body 3 to tilt. At the same time, it prevents the operator from pulling out the T-shaped pin 9 when the support foot 7 is not completely retracted, causing the support arm 5 to loosen and tilt.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An anti-tilt support device for an aerial work platform, comprising a base (1) and an aerial work platform body (3), wherein the aerial work platform body (3) is arranged on the upper surface of the base (1), and two groups of rollers (2) are symmetrically arranged in pairs on the lower surface of the base (1), characterized in that: A group of fixing blocks (4) are symmetrically arranged in pairs on the outer surfaces of the two opposite sides of the base (1), and the outer surfaces of the two fixing blocks (4) in a group are both provided with openings, and a support arm (5) is rotatably mounted between the inner walls of the openings, and the upper surface of the support arm (5) is away from the base (1) at one end thereof. A T-shaped sleeve (23) is slidably mounted on the inner wall of the circular hole, and a spline groove (2401) is provided on the lower surface of the support arm (5) away from the base (1), and a spline sleeve (24) is slidably mounted on the inner wall of the spline groove (2401), and the bottom end of the T-shaped sleeve (23) passes through the bottom wall of the circular hole and is fixedly mounted on the top end of the spline sleeve (24), and the T-shaped sleeve (23) and the spline sleeve (24) are rotatably mounted. 4) are arranged on the same axis, the outer diameter of the spline sleeve (24) is larger than the outer diameter of the bottom end of the T-shaped sleeve (23), the bottom end of the spline sleeve (24) penetrates the lower surface of the support arm (5) and is fixedly mounted with a connecting block, the upper surface of the connecting block is fixedly mounted with a connecting column, the lower surface of the support arm (5) is fixedly mounted with a second cylinder (26), the inner wall of the second cylinder (26) is slidably mounted with a second piston (27), the top end of the connecting column is fixedly mounted with the lower surface of the second piston (27), the upper surface of the base (1) is penetrated with a circular groove (10), four support blocks (12) are fixedly mounted between the inner walls of the circular groove (10) near the bottom end, and the upper surfaces of the four support blocks (12) are fixedly mounted with a circular groove (10) and a circular groove (10) is formed on the inner wall of the circular groove (10) near the bottom end. A first cylinder (14) is fixedly mounted on the surface of each of the grooves (10), a first piston (15) is slidably mounted on the inner wall of the first cylinder (14), a sliding column (16) is fixedly mounted on the upper surface of the first piston (15), the top end of the sliding column (16) passes through the top end of the first cylinder (14) and a warning light (13) is fixedly mounted thereon, two conductive contact protrusions (17) are arranged on the circumferential outer surface of the warning light (13), four conductive blocks (11) are fixedly mounted at equal intervals between the inner walls of the circular groove (10) near the top end, the outer surfaces of the conductive blocks (11) abut against the ends of the conductive contact protrusions (17), the bottom end of the first cylinder (14) passes through the lower surface of the support block (12) and a first pipe joint is fixedly mounted thereon, A second pipe joint is fixedly mounted on the circumferential outer surface of the second cylinder (26) near the top end, a conduit (28) is connected between the first pipe joint and the second pipe joint, the first cylinder (14) is connected to the interior of the second cylinder (26) via the first pipe joint, the conduit (28) and the second pipe joint, a screw rod (8) is inserted into the interior of the spline sleeve (24), the screw rod (8) is threadedly connected to the spline sleeve (24), the top end of the screw rod (8) passes through the T-shaped sleeve (23) and is fixedly mounted with a hand wheel (6), the bottom end of the screw rod (8) passes through the spline sleeve (24) and is fixedly mounted with a ball head (801), and a support foot (7) is slidably mounted on the outer surface of the ball head (801).

2. The anti-tilt support device for an aerial work platform according to claim 1, characterized in that: A through hole is formed through the upper surface of the fixing block (4); a plug hole (18) is formed through the outer surface of the support arm (5) near the through hole; the plug hole (18) has the same shape as the through hole; the plug hole (18) and the through hole are arranged on the same axis; a T-shaped plug pin (9) is inserted into the inside of the plug hole (18) and the through hole; a limiting protrusion (901) is formed on the circumferential outer surface of the T-shaped plug pin (9); and a limiting groove (1801) matching the limiting protrusion (901) is formed on the inner wall of the plug hole (18) and the through hole.

3. The anti-tilt support device for an aerial work platform according to claim 2, characterized in that: The T-shaped latch (9) has a slot (902) formed on a circumferential outer surface near the top end, and the slot (902) is arranged on the outer surface of the T-shaped latch (9) near the T-shaped sleeve (23). The upper surface of the support arm (5) has a mounting slot (19), and a slide plate (20) is slidably mounted on the inner wall of the mounting slot (19). A slide bar (25) is inserted inside the slide plate (20), and the slide bar (25) is fixedly mounted on the slide plate (20). One end of the slide bar (25) near the T-shaped latch (9) passes through the inner wall of the mounting slot (19) and is fixedly mounted with a top block (22). The outer surface of the top block (22) is provided with a block matching the slot (902); the bottom wall of the slot (902) and the lower surface of the top block (22) are located in the same plane; the outer surface of the circumference of the T-shaped sleeve (23) near the top is provided with a chamfer (2301); one end of the slide bar (25) near the T-shaped sleeve (23) passes through the inner wall of the mounting slot (19) and is provided with an oblique angle matching the chamfer (2301); the outer surface of the slide bar (25) is sleeved with a spring (21); the spring (21) is provided between the slide plate (20) and the inner wall of the mounting slot (19) near the T-shaped latch (9).

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