CN213085318U

CN213085318U - Building material lifts by crane overload prevention device

Info

Publication number: CN213085318U
Application number: CN202022123158.1U
Authority: CN
Inventors: 李高峰; 廉保华; 张震
Original assignee: Henan Polytechnic Institute
Current assignee: Henan Polytechnic Institute
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-04-30
Anticipated expiration: 2030-09-24

Abstract

The utility model provides a building material hoisting overload prevention device, which effectively solves the problems that the overload device in the existing hoisting device is inconvenient to adjust and can not adapt to the small construction requirement; the technical scheme for solving the problem is that the worm gear mechanism comprises a shell, wherein a worm gear and worm mechanism is arranged in the shell, the worm is arranged in the horizontal direction and can rotate, the worm gear and the shell are rotationally fixed together, the rear end of a central shaft of the worm gear penetrates through a side plate of the shell and is arranged on the outer side of the shell, a horizontal through hole is formed in the worm, a horizontal spline cylinder penetrates through the through hole, and a spline shaft capable of actively rotating is arranged in the spline shaft; set up a plurality of blind holes that are the circumference equipartition on the through-hole lateral wall of worm, have in the blind hole to follow the gliding flat board of blind hole, be connected with the pressure spring between flat board and the blind hole, there is protruding piece in the spline section of thick bamboo outside, and the cross-section of protruding piece is the polyhedron, and the flat board can be pressed at protruding piece surface under the pressure spring effect, and the spline section of thick bamboo can drive the worm through protruding piece, flat board and rotate.

Description

Building material lifts by crane overload prevention device

Technical Field

The utility model relates to a building equipment technical field that lifts by crane, especially a building material lifts by crane overload prevention device.

Background

In building construction, especially small-size job site often uses hoisting accessory for temporarily lift some building materials, but current professional hoisting accessory, various components all are relatively fixed, and the overload device on it is comparatively professional, but the component is complicated, if be used in rural folk house construction, all be uneconomical from economic and efficiency point of view. Furthermore, the loading capacity of the hoisting device is not only determined by the power of the motor, but the maximum weight of the hoisting can also be determined by the rope. In a small construction site, particularly a construction project with low professional performance, if a lifted rope is broken, various options such as hemp ropes, nylon ropes, iron chains and the like can replace the original rope at any time, and then an overload device is adjusted, so that the maximum lifting weight is adjusted to prevent danger, but most of the existing overload devices are not adjustable.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned condition, for overcoming prior art's defect, the utility model provides a building material lifts by crane overload prevention device, the effectual current inconvenient regulation of overload device who lifts by crane in having solved, can not adapt to the problem that small-size construction needs.

The technical scheme includes that the worm gear mechanism comprises a fixed shell, a worm gear and worm mechanism is arranged in the shell, wherein the worm is arranged in the horizontal direction and can rotate, a central shaft of the worm gear is arranged in the front-back direction, the worm gear and the shell are rotationally fixed together, the rear end of the central shaft of the worm gear penetrates through a side plate of the shell and is arranged outside the shell, a horizontal through hole is formed in the worm, a horizontal spline cylinder penetrates through the through hole, and a spline shaft capable of actively rotating is arranged in the spline shaft; set up a plurality of blind holes that are the circumference equipartition on the through-hole lateral wall of worm, have in the blind hole to follow the gliding flat board of blind hole, be connected with the pressure spring between flat board and the blind hole, there is protruding piece in the spline section of thick bamboo outside, and the cross-section of protruding piece is the polyhedron, and the flat board can be pressed at protruding piece surface under the pressure spring effect, and the spline section of thick bamboo can drive the worm through protruding piece, flat board and rotate.

The utility model discloses the structure is ingenious, can make things convenient for and quick regulation overload arrangement's the biggest lifting capacity, can adapt to the demand of lifting by crane, convenient operation at the small-size building job site.

Drawings

Fig. 1 is a front sectional view of the present invention.

Fig. 2 is a side sectional view of the present invention.

Fig. 3 is a structural diagram of the middle spline cylinder of the present invention.

Fig. 4 is an internal structure view of the middle spline cylinder of the present invention.

Fig. 5 is a structural diagram of the middle worm and the upper blind hole thereof.

Detailed Description

The following detailed description of embodiments of the present invention is made with reference to the accompanying drawings.

The utility model comprises a fixed shell 1, a worm wheel 2 and worm 3 mechanism is arranged in the shell 1, wherein the worm 3 is arranged along the horizontal direction and can rotate, a central shaft 4 of the worm wheel 2 is arranged along the front and back directions, the worm wheel 2 and the shell 1 are fixed together in a rotating way, the rear end of the central shaft 4 of the worm wheel 2 penetrates through a side plate of the shell 1 and is arranged outside the shell 1, a horizontal through hole is arranged on the worm 3, a horizontal spline cylinder 5 penetrates through the through hole, and a spline shaft 6 capable of actively rotating is arranged in the spline cylinder 5; set up a plurality of blind holes 7 that are the circumference equipartition on the through-hole lateral wall of worm 3, have in the blind hole 7 can follow the gliding flat board of blind hole 7, be connected with the pressure spring between flat board and the blind hole 7, there is protruding piece 8 in the spline section of thick bamboo 5 outside, and the cross-section of protruding piece 8 is the polyhedron, and the flat board can be pressed down at protruding piece 8 surface under the pressure spring effect, and spline section of thick bamboo 5 can drive worm 3 through protruding piece 8, flat board and rotate.

In order to realize the adjustment of the maximum hoisting weight, the plurality of blind holes 7 which are uniformly distributed at the circumference are a group, the blind holes 7 are provided with a plurality of groups, the elasticity of the pressure spring in each group is kept consistent, the elasticity of the pressure spring between the blind holes 7 in each group is different, the spline shaft 6 can move left and right, and the convex blocks 8 on the spline shaft 6 are only matched with one group of blind holes 7 at the same time.

In order to realize the left and right movement of the spline shaft 6, the right end of the spline cylinder 5 penetrates through the side wall of the shell 1 and is arranged outside the shell 1, a first cylinder 9 is sleeved on the part, arranged outside the shell 1, of the spline cylinder 5, a second cylinder 10 is sleeved on the right end of the first cylinder 9, the first cylinder 9 and the second cylinder 10 are screwed together through threads, the second cylinder 10 is rotatably connected with the spline cylinder 5, a clamp spring is installed between the second cylinder 10 and the spline cylinder 5, and the second cylinder 10 can control the left and right movement of the spline cylinder 5.

When the winding device is used, the left end of the spline shaft 6 is connected with the motor 11, the motor 11 is fixed on the shell 1, and the central shaft 4 of the worm wheel 2 is provided with the winding reel; the device uses a worm wheel 2 and worm 3 mechanism, firstly, the device can transmit larger torque, and secondly, the self-locking function of the worm wheel 2 and worm 3 is utilized, so that the danger in hoisting is reduced; and a bearing is arranged between the right end of the spline cylinder 5 and the second cylinder 10.

When the device is used, the device is fixed at a proper position according to requirements, the position of the protrusion in the spline cylinder 5 is adjusted according to the rated power of the rope and the motor 11, then the motor 11 is started, the motor 11 drives the spline cylinder 5 to rotate through the spline shaft 6, the spline cylinder 5 drives the worm 3 to rotate through the protrusion block 8 and the flat plate on the spline cylinder, the worm 3 drives the worm wheel 2 to rotate, and the central shaft 4 on the worm wheel 2 drives the winding wheel to rotate, so that the hoisting operation is realized; when lifting by crane object weight when too big, worm wheel 2 pivoted resistance grow this moment, and the resistance of corresponding worm 3 also grows, and motor 11 still drives integral key shaft 6 and rotates this moment, and integral key shaft 6 drives spline section of thick bamboo 5 and rotates, and protruding piece 8 promotes in the blind hole 7 at its place flat board all around this moment, finally leads to integral key shaft 6 idle running, can only reduce the volume of lifting by crane this moment, lifts by crane again, guarantees construction safety.

Claims

1. The building material hoisting overload prevention device is characterized by comprising a fixed shell (1), wherein a worm wheel (2) and worm (3) mechanism is arranged in the shell (1), the worm (3) is arranged in the horizontal direction and can rotate, a central shaft (4) of the worm wheel (2) is arranged in the front-back direction, the worm wheel (2) and the shell (1) are rotationally fixed together, the rear end of the central shaft (4) of the worm wheel (2) penetrates through a side plate of the shell (1) and is arranged on the outer side of the shell (1), a horizontal through hole is formed in the worm (3), a horizontal spline cylinder (5) penetrates through the through hole, and a spline shaft (6) capable of actively rotating is arranged in the spline cylinder (5); offer a plurality of blind holes (7) that are the circumference equipartition on the through-hole lateral wall of worm (3), have in blind hole (7) can follow the gliding flat board of blind hole (7), be connected with the pressure spring between flat board and blind hole (7), there is protruding piece (8) spline section of thick bamboo (5) outside, the cross-section of protruding piece (8) is the polyhedron, the flat board can push down at protruding piece (8) surface under the pressure spring effect, spline section of thick bamboo (5) can drive worm (3) through protruding piece (8), the flat board rotates.

2. The building material hoisting overload prevention device according to claim 1, wherein the plurality of circumferentially and uniformly distributed blind holes (7) form a group, the blind holes (7) have a plurality of groups, the elasticity of the pressure springs in each group is kept consistent, the elasticity of the pressure springs between the blind holes (7) in each group is different, the spline shaft (6) can move left and right, and the convex blocks (8) on the spline shaft (6) are only matched with one group of blind holes (7) at the same time.

3. The building material lifting overload prevention device according to claim 1, wherein the right end of the spline cylinder (5) penetrates through the side wall of the shell (1) and is arranged on the outer side of the shell (1), a first cylinder (9) is sleeved on a part, arranged on the outer side of the shell (1), of the spline cylinder (5), the left end of the first cylinder (9) is fixed with the shell (1), a second cylinder (10) is sleeved on the right end of the first cylinder (9), the first cylinder (9) and the second cylinder (10) are screwed together through threads, the second cylinder (10) is rotatably connected with the spline cylinder (5), a clamp spring is installed between the second cylinder (10) and the spline cylinder (5), and the second cylinder (10) can control the spline cylinder (5) to move left and right.