Lifting device for small mechanical equipment

Abstract

A lifting device for small mechanical equipment comprises a lifting arm, the end of the lifting arm is connected with a hook, the hook is connected with a lifting appliance, the lifting appliance comprises a pull disc, a hook body of the hook is hooked to the upper portion of the pull disc, a fixing plate is arranged below the pull disc, four first bevel gears are arranged in the fixing plate, and the four sides of the fixing plate are each fixedly connected with a U-shaped plate; the interiors of the four U-shaped plates are rotationally connected with threaded rods, one ends of the four threaded rods penetrate through the side wall of the fixing plate, are rotationally connected with the fixing plate and are finally connected with first bevel gears, and the first bevel gears can transmit torque to the threaded rods; and clamping arms are connected into the four U-shaped plates in a sliding manner. Compared with the prior art, the utility model has the technical effects that the distance among the four clamping arms is adjusted through the motor, so that mechanical equipment with different sizes can be clamped, the application range is wider, and hoisting equipment with different models does not need to be frequently replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a lifting device for small mechanical equipment. Background Art

[0002] At present, with the development of science and technology, mechanical equipment has become an indispensable equipment in people's daily production and life; mechanical equipment requires regular inspection and maintenance to ensure its normal operation. The inspection and maintenance process of mechanical equipment involves the lifting and transportation of mechanical equipment. In order to facilitate the lifting and transfer, the existing technology usually fixes the mechanical equipment with a lifting device and then lifts it.

[0003] Most existing lifting devices use a lifting arm to clamp and lift mechanical equipment. During lifting, the friction between the clamping arm and the equipment prevents it from falling off during lifting and transportation. However, the equipment is prone to shaking and instability during transportation, which brings certain risks to the transportation work.

[0004] At the same time, the clamping arms of the lifting device are usually fixed, and the corresponding lifting device needs to be replaced for mechanical equipment of different sizes, which affects the work efficiency. Utility Model Content

[0005] The technical problem to be solved by the present invention is: how to provide a lifting device for small mechanical equipment to solve the problem in the prior art that lifting devices of different sizes need to be frequently replaced for different equipment during operation.

[0006] The technical solution of the utility model is specifically as follows:

[0007] A lifting device for small mechanical equipment includes a lifting arm, the end of the lifting arm is connected to a hook, the hook is connected to a sling, the sling includes a pulling plate, the hook body of the hook is hooked on the upper part of the pulling plate, a fixed plate is provided below the pulling plate, four first bevel gears are provided inside the fixed plate, a U-shaped plate is fixedly connected to the four sides of the fixed plate, the four U-shaped plates are rotatably connected to the inside of the four threaded rods, one end of the four threaded rods passes through the side wall of the fixed plate, and is rotatably connected to the fixed plate and finally connected to the first bevel gear, so that the first bevel gear can transmit torque to the threaded rod; the four U-shaped plates are slidably connected to the inside of the four U-shaped plates, the threaded rods pass through the clamping arms and are threadedly connected to the clamping arms; a motor is fixedly connected to the top of the fixed plate, and a second bevel gear is fixedly connected to the output end of the motor, and the four first bevel gears are meshed with the second bevel gear; the pulling plate is connected to a U-shaped plate through four steel cables.

[0008] The outer sides of the inner ends of the four threaded rods are fixedly connected with a transmission ring, and a friction ring is sleeved on the outer side of the threaded rod so that the friction ring can slide on the threaded rod. The friction ring is located between the transmission ring and the first bevel gear. A compression spring is sleeved on the outer side of the threaded rod, and the compression spring is arranged between the transmission ring and the friction ring, and the two ends of the compression spring are respectively fixed to the transmission ring and the friction ring. The threaded rod is rotatably connected to the first bevel gear, and the friction ring and the first bevel gear form a clutch, and the contact surface between the two is a friction surface.

[0009] The bottoms of the four clamping arms are all fixedly connected with supporting plates.

[0010] The connection between the pull plate and the steel cable is specifically as follows: the top of the four U-shaped plates away from the fixed plate are fixedly connected to a fixed block, the four fixed blocks are hinged with steel cables inside, the top of the pull plate is fixedly connected to a fixed ring, the fixed ring is adapted to the hook, the four steel cables are hinged to the pull plate at one end away from the fixed block, and the four steel cables are distributed in a circular array on the outside of the pull plate.

[0011] Compared with the prior art, the technical effect of the present invention is that the present invention adjusts the spacing between the four clamping arms through a motor, thereby clamping mechanical equipment of different sizes, with a wider range of uses and no need to frequently replace different models of lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the present utility model.

[0013] Figure 2 It is a schematic cross-sectional view of the interior of the utility model.

[0014] Figure 3 Schematic diagram of the first bevel gear.

[0015] Figure 4 Schematic diagram of the clamp arm.

[0016] Figure 5 This is a schematic diagram of the pull plate.

[0017] Among them: 1. boom; 2. hook; 3. pull plate; 4. steel cable; 5. fixed plate; 6. U-shaped plate; 7. fixed block; 8. threaded rod; 9. clamping arm; 10. transmission ring; 11. compression spring; 12. friction ring; 13. first bevel gear; 14. second bevel gear; 15. motor; 16. small equipment; 17. support plate; 18. fixed ring. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

[0019] like Figure 1-5A lifting device for small mechanical equipment includes a boom 1, the end of the boom 1 is connected to a hook 2, the hook 2 is connected to a sling, and the sling is used to clamp a small device (a lifted part, hereinafter referred to as a workpiece) 16.

[0020] The sling includes a pulling plate 3, the hook body of the hook 2 is hooked on the upper part of the pulling plate 3, a fixed plate 5 is provided below the pulling plate 3, four first bevel gears 13 are provided inside the fixed plate 5, and a U-shaped plate 6 is fixedly connected to the four sides of the fixed plate 5. The four U-shaped plates 6 are rotatably connected to the inside of the threaded rods 8. One end of the four threaded rods 8 passes through the side wall of the fixed plate 5, and is rotatably connected to the fixed plate 5, and finally connected to the first bevel gear 13, so that the first bevel gear 13 can transmit torque to the threaded rod 8.

[0021] The four U-shaped plates 6 are all slidably connected to the clamping arms 9 , and the threaded rods 8 pass through the clamping arms 9 and are threadedly connected to the clamping arms 9 .

[0022] A motor 15 is fixedly connected to the top of the fixed plate 5 , and a second bevel gear 14 is fixedly connected to the output end of the motor 15 . The four first bevel gears 13 are all meshed and connected with the second bevel gear 14 .

[0023] The pull plate 3 is connected to a U-shaped plate 6 via four steel cables 4 .

[0024] In order to adapt to rectangular workpieces, the following improvements are made:

[0025] like Figure 2-4 The inner ends of the four threaded rods 8 (close to the first bevel gear 13) are fixedly connected to the outside of the transmission ring 10, and the friction ring 12 is sleeved on the outside of the threaded rod 8 so that the friction ring 12 can slide on the threaded rod 8. The friction ring 12 is located between the transmission ring 10 and the first bevel gear 13. A compression spring 11 is sleeved on the outside of the threaded rod 8. The compression spring 11 is arranged between the transmission ring 10 and the friction ring 12, and the two ends of the compression spring 11 are respectively fixed to the transmission ring 10 and the friction ring 12. The threaded rod 8 is rotatably connected to the first bevel gear 13, and the friction ring 12 and the first bevel gear 13 form a clutch, and the contact surface between the two is a friction surface.

[0026] like Figure 1 The bottoms of the four clamping arms 9 are fixedly connected to a support plate 17, and the threaded rod 8 rotates to drive the clamping arms 9 and the support plate 17 to move and clamp the workpiece 16.

[0027] like Figure 1 、 5 The connection between the pull tray 3 and the steel cable 4 is specifically as follows: the top of the four U-shaped plates 6 away from the fixed plate 5 is fixedly connected to the fixed block 7, the four fixed blocks 7 are hinged with steel cables 4, the top of the pull tray 3 is fixedly connected to a fixed ring 18, the fixed ring 18 is adapted to the hook 2, the four steel cables 4 are hinged to the pull tray 3 at one end away from the fixed block 7, and the four steel cables 4 are distributed in a circular array on the outside of the pull tray 3.

[0028] When used, the utility model comprises the following steps:

[0029] S1. Positioning: During operation, the worker connects the hook 2 to the pull plate 3. The working mode of the boom 1 and the hook 2 is an existing mature technology and will not be described in detail here. The worker operates the hook 2 to drive the pull plate 3 to move. The pull plate 3 drives the four U-shaped plates 6 to move through the four steel cables 4 until the clamping arm 9 drops to the four sides of the workpiece 16, and the hook 2 stops.

[0030] S2, Clamping 1: At this time, the motor 15 is working to drive the second bevel gear 14 to rotate. The rotation of the second bevel gear 14 drives the first bevel gear 13 meshing with the second bevel gear 14 to rotate. Under the action of the thrust of the compression spring 11, the pressure between the friction ring 12 and the first bevel gear 13 is relatively large. The first bevel gear 13 drives the friction ring 12 to rotate by relying on the static friction torque. The friction ring 12 drives the compression spring 11 and the transmission ring 10 to rotate, thereby transmitting torque.

[0031] The transmission ring 10 drives the threaded rod 8 to rotate, and the threaded rod 8 is threadedly connected to the clamping arm 9. The rotation of the threaded rod 8 drives the clamping arm 9 to move horizontally inside the U-shaped plate 6 toward the workpiece 16. If the workpiece 16 is square, the clamping step ends. If the workpiece 16 is rectangular, step S3 is performed.

[0032] S3. Clamping 2: When the clamping arm 9 in the larger dimension direction (hereinafter referred to as the blocking clamping arm) is in close contact with the workpiece 16, the clamping arm 9 in this direction needs to stop moving, while the clamping arm 9 in the smaller dimension direction needs to continue to approach the workpiece 16. This is achieved by a clutch member, as described below:

[0033] After the blocking clamp arm is pressed against the workpiece 16, it cannot move further, causing the threaded rod 8 to be unable to rotate. At this time, the transmission ring 10 cannot rotate either. However, the second bevel gear 14 continues to drive the first bevel gear 13 to rotate, and the first bevel gear 13 is still driving the friction ring 12 to rotate. The compression spring 11 is forced to rotate and deform, generating torque. As the first bevel gear 13 continues to rotate, the torque of the compression spring 11 continues to increase until the torque is greater than the "maximum static friction torque between the friction ring 12 and the first bevel gear 13". The friction ring 12 begins to slip with the first bevel gear 13 (that is, when the first bevel gear 13 rotates, the friction ring 12 stops rotating), and the blocking clamp arm stops moving forward.

[0034] However, this will not affect the continued rotation of the other first bevel gears 13 and the second bevel gear 14, that is: under the action of the friction ring 12, the cessation of movement of a single clamping arm 9 will not affect the movement of other clamping arms 9, and so on. The rotation of the second bevel gear 14 simultaneously drives the four clamping arms 9 to move toward the center of the equipment until the four clamping arms 9 are all close to the workpiece 16, and the motor 15 stops working. At this time, the support plate 17 fixed to the bottom of the four clamping arms 9 is located below the workpiece 16 to prevent the equipment from falling during lifting and transportation, thereby improving the safety of workers' work and completing the clamping operation.

[0035] S4, moving: The hook 2 then lifts and transports the workpiece 16 fixed between the four clamping arms 9, so that the workpiece 16 reaches the target position.

[0036] S5, release: After the workpiece 16 is in place, the motor 15 is reversed, and the four clamping arms 9 move in the opposite direction to release the fixation of the workpiece 16. This step is similar to steps S2 and S3 and will not be repeated here.

[0037] Features of this application:

[0038] 1. The clamping arm 9 moves horizontally outside the threaded rod 8, and the distance between the four clamping arms 9 is adjusted by the operation of the motor 15, so that mechanical equipment of different models and specifications can be clamped without replacing different types of lifting equipment. A single clamping arm 9 stops moving after being close to one side of the workpiece 16, so that the four clamping arms 9 are adapted to the four sides of the workpiece 16 during movement, close to the four sides of the workpiece 16 and fixed, thereby improving the efficiency of fixing the workpiece 16.

[0039] 2. When the present application is working, the friction ring is pressed against the first bevel gear under the action of the elastic force of the compression spring. When the first bevel gear rotates, the friction ring drives the compression spring and the transmission ring to rotate through the friction force to transmit torque. When the clamping arm is pressed against the small equipment, the threaded rod cannot rotate, and the friction ring cannot rotate at this time. At this time, the second bevel gear drives the first bevel gear to rotate, and the friction ring will slip with the first bevel gear, which will not affect the continued rotation of the four first bevel gears and the second bevel gear, so that the second bevel gear can continue to drive the movement of other clamping arms.

[0040] For other contents, please refer to the prior art.

[0041] The above description is only the preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A lifting device for small mechanical equipment, comprising a lifting arm (1), an end of the lifting arm (1) connected to a hook (2), and the hook (2) connected to a sling, characterized in that: The sling comprises a pulling plate (3), a hook body of a hook (2) hooked on the upper part of the pulling plate (3), a fixing plate (5) is provided below the pulling plate (3), four first bevel gears (13) are provided inside the fixing plate (5), four sides of the fixing plate (5) are fixedly connected to a U-shaped plate (6), the four U-shaped plates (6) are rotatably connected to threaded rods (8), one end of each of the four threaded rods (8) passes through the side wall of the fixing plate (5), and is rotatably connected to the fixing plate (5), and finally connected to the first bevel gear (13), so that the first bevel gear (13) can transmit torque to the threaded rod (8); The four U-shaped plates (6) are all slidably connected to the clamping arms (9), and the threaded rods (8) pass through the clamping arms (9) and are threadedly connected to the clamping arms (9); The top of the fixed plate (5) is fixedly connected to a motor (15), an output end of the motor (15) is fixedly connected to a second bevel gear (14), and the four first bevel gears (13) are all meshedly connected to the second bevel gear (14); The pull plate (3) is connected to a U-shaped plate (6) via four steel cables (4).

2. The lifting device for small mechanical equipment according to claim 1, characterized in that: The outer sides of the inner ends of the four threaded rods (8) are fixedly connected with a transmission ring (10), the outer sides of the threaded rods (8) are sleeved with a friction ring (12), so that the friction ring (12) can slide on the threaded rods (8), and the friction ring (12) is located between the transmission ring (10) and the first bevel gear (13). The outer sides of the threaded rods (8) are sleeved with a compression spring (11), which is arranged between the transmission ring (10) and the friction ring (12), and the two ends of the compression spring (11) are respectively fixed to the transmission ring (10) and the friction ring (12), the threaded rods (8) are rotationally connected to the first bevel gear (13), and the friction ring (12) and the first bevel gear (13) form a clutch, and the contact surface between the two is a friction surface.

3. The lifting device for small mechanical equipment according to claim 2, characterized in that: The bottoms of the four clamping arms (9) are all fixedly connected with supporting plates (17).

4. The lifting device for small mechanical equipment according to claim 3, characterized in that: The connection between the pull plate (3) and the steel cable (4) is specifically as follows: the top of the four U-shaped plates (6) away from the fixed plate (5) is fixedly connected to a fixed block (7), the inside of the four fixed blocks (7) is hinged with a steel cable (4), the top of the pull plate (3) is fixedly connected to a fixed ring (18), the fixed ring (18) is adapted to the hook (2), the ends of the four steel cables (4) away from the fixed block (7) are hinged to the pull plate (3), and the four steel cables (4) are distributed in a ring array on the outside of the pull plate (3).

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