Brake structure of electric hoist

Abstract

The utility model belongs to the field of brake structures, and particularly relates to an electric hoist brake structure which comprises a hoist, a main shaft is arranged in the hoist, the right end of the hoist is fixedly connected with a fixing cover, the outer side of the fixing cover is connected with an access cover in a sliding mode, and a dismounting mechanism is arranged on the fixing cover. Two symmetrically-distributed deflection frames are hinged to the interior of the fixing cover, and brake pads are fixedly connected to the sides, close to the main shaft, of the deflection frames. The deflection frame, the brake pad, the threaded frame and other structures are additionally arranged in the fixing cover, when braking is needed, the deflection frame can be driven to deflect through thread fit between the positive and negative screw rod and the threaded frame, the deflection frame can drive the brake pad to be extruded on the outer side of the brake ring in the deflection process, resistance braking is conducted on the main shaft, and the braking effect is good. And the braking force can be controlled through the rotation degree of the screw during braking, so that sudden locking of the brake can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of brake structures, in particular to a brake structure for an electric hoist. Background Art

[0002] According to a brake structure for an electric hoist proposed in the patent authorization announcement number: CN220351587U, the utility model discloses a brake structure for an electric hoist, belonging to the technical field of electric hoists, including a rotating shaft, one end of the rotating shaft is fixed with a winding roller for winding a steel wire rope, the outside of the rotating shaft is sleeved with a fixed cylinder, the surface of the rotating shaft is provided with a fixed seat, the inner cavity of the fixed cylinder is movably provided with a movable seat, and the movable seat is sleeved outside the rotating shaft. By energizing an electromagnetic coil, the electromagnetic fixing tube is magnetized, and then the movable seat is magnetized. The magnetized movable seat directly adsorbs the fixed seat, so that the friction plates on the fixed seat and the movable seat are in contact. By using the characteristic that the movable seat cannot rotate while the fixed seat rotates with the rotating shaft, the fixed seat and the rotating shaft are braked by friction. The structure is simple and there is no excessive complex movable connection structure, which can ensure the stability of the device during operation, reduce the occurrence of failure rate, and improve the safety performance of the electric hoist.

[0003] However, in the prior art, the brake mechanism provides power through an electromagnetic method during use. The electromagnetic drive method is likely to cause the sudden braking force to be too large, resulting in the main shaft being suddenly locked, causing damage to the motor, and it is not convenient for maintenance during daily use. Therefore, it is necessary to improve the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a brake structure for an electric hoist, which solves the problems that the braking force is not convenient to adjust and the brake structure is not convenient for maintenance.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A brake structure for an electric hoist, including a hoist, a main shaft is arranged inside the hoist, a fixed cover is fixedly connected to the right end of the hoist, a maintenance cover is slidably connected to the outside of the fixed cover, a disassembly mechanism is arranged on the fixed cover, two symmetrically distributed deflection frames are hinged inside the fixed cover, a brake pad is fixedly connected to one side of the deflection frame close to the main shaft, a fixed frame is fixedly connected to the upper end of the fixed cover, a positive and negative screw rod is installed inside the fixed frame through a bearing, two symmetrically distributed threaded frames are threadedly connected to the outside of the positive and negative screw rod, a large gear is fixedly connected to the outside of the positive and negative screw rod, and a motor is fixedly connected to the upper end of the fixed cover.

[0006] Preferably, a brake ring is fixedly connected to the outside of the main shaft. The brake ring is located between the two brake pads and does not contact the brake pads. The brake pads can brake the main shaft through the brake ring.

[0007] Preferably, the threaded frame is movably connected to the deflecting frame, and the deflecting frame contacts the inspection cover. The threaded frame can drive the deflecting frame to deflect.

[0008] Preferably, a small gear is fixedly connected to the outside of the output shaft of the motor. The small gear meshes with the large gear. The motor can drive the forward and reverse screw rod to rotate through the meshing between the small gear and the large gear.

[0009] Preferably, the disassembly mechanism includes a guide frame. The guide frame is fixedly connected to the lower end of the fixed cover. A limit frame is slidably connected to the outside of the guide frame. A pull ring is fixedly connected to the outside of the limit frame. A spring is arranged on the outer side of the rod member of the guide frame. The guide frame can guide the movement of the limit frame.

[0010] Preferably, one end of the spring is fixedly connected to the guide frame, and the other end of the spring is fixedly connected to the limit frame. The spring can drive the limit frame to automatically reset through the elastic force.

[0011] Preferably, the limit frame is slidably connected to the inspection cover. The main shaft passes through the inspection cover and is not slidably connected to the inspection cover. The limit frame can limit the inspection cover.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. By adding structures such as a deflecting frame, brake pads and a threaded frame inside the fixed cover, when braking is required, the deflecting frame can be driven to deflect through the thread fit between the forward and reverse screw rod and the threaded frame. During the deflection of the deflecting frame, the brake pads can be driven to press against the outside of the brake ring to perform resistance braking on the main shaft. At the same time of braking, the braking force can be controlled by the rotation degree of the screw rod, so that sudden braking lock can be effectively avoided.

[0014] 2. By adding structures such as an inspection cover, a limit frame and a spring outside the fixed cover, during use, the limit frame can be driven by the elastic force to slide to the outside of the inspection cover to limit the inspection cover. When maintenance is required, only the limit needs to be disengaged from the inspection cover, and then the inspection cover can be disassembled, so that the braking structure is more convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0016] Figure 2 is of the present utility modelFigure 1 Stereoscopic view of the local structure;

[0017] Figure 3 This is for the Figure 1 Stereoscopic enlarged view of the inspection cover;

[0018] Figure 4 This is for the Figure 1 Enlarged view of the structure of part A;

[0019] Figure 5 This is for the Figure 2 Enlarged view of the structure of part B;

[0020] Figure 6 This is for the Figure 5 Stereoscopic enlarged view of the deflection frame;

[0021] Figure 7 This is for the Figure 5 Stereoscopic enlarged view of the threaded frame.

[0022] In the figure: 1, hoist; 2, main shaft; 3, fixed cover; 4, inspection cover; 5, disassembly mechanism; 6, brake ring; 7, deflection frame; 8, brake pad; 9, fixed frame; 10, positive and negative screw rod; 11, threaded frame; 12, large gear; 13, motor; 14, small gear; 51, guide frame; 52, limit frame; 53, pull ring; 54, spring. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7, an electric hoist brake structure, including a hoist 1, a main shaft 2 is arranged inside the hoist 1, a fixed cover 3 is fixedly connected to the right end of the hoist 1, a maintenance cover 4 is slidably connected to the outside of the fixed cover 3, a disassembly mechanism 5 is arranged on the fixed cover 3, two symmetrically distributed deflection frames 7 are hinged inside the fixed cover 3, a brake pad 8 is fixedly connected to the side of the deflection frame 7 close to the main shaft 2, a fixed frame 9 is fixedly connected to the upper end of the fixed cover 3, a positive and negative screw rod 10 is installed inside the fixed frame 9 through a bearing, two symmetrically distributed threaded frames 11 are threadedly connected to the outside of the positive and negative screw rod 10, a large gear 12 is fixedly connected to the outside of the positive and negative screw rod 10, and a motor 13 is fixedly connected to the upper end of the fixed cover 3.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , a brake ring 6 is fixedly connected to the outside of the main shaft 2, the brake ring 6 is located between the two brake pads 8 and does not contact the brake pads 8, the brake pads 8 can brake the main shaft 2 through the brake ring 6, the threaded frame 11 is movably connected to the deflection frame 7, the deflection frame 7 contacts the maintenance cover 4, the threaded frame 11 can drive the deflection frame 7 to deflect, a small gear 14 is fixedly connected to the outside of the output shaft of the motor 13, the small gear 14 meshes with the large gear 12, and the motor 13 can drive the positive and negative screw rod 10 to rotate through the meshing between the small gear 14 and the large gear 12.

[0026] Please refer to Figure 1 , Figure 4 , the disassembly mechanism 5 includes a guide frame 51, the guide frame 51 is fixedly connected to the lower end of the fixed cover 3, a limit frame 52 is slidably connected to the outside of the guide frame 51, a pull ring 53 is fixedly connected to the outside of the limit frame 52, a spring 54 is arranged on the outer rod of the guide frame 51, the guide frame 51 can guide the movement of the limit frame 52, one end of the spring 54 is fixedly connected to the guide frame 51, the other end of the spring 54 is fixedly connected to the limit frame 52, the spring 54 can drive the limit frame 52 to automatically reset through the elastic force, the limit frame 52 is slidably connected to the maintenance cover 4, the main shaft 2 passes through the maintenance cover 4 and is not slidably connected to the maintenance cover 4, and the limit frame 52 can limit the maintenance cover 4.

[0027] The specific implementation process of the present utility model is as follows: When braking is required, the motor 13 is started, and the motor 13 drives the small gear 14 to rotate. The small gear 14 drives the left - right screw rod 10 to rotate through the large gear 12. During the rotation of the left - right screw rod 10, the deflection frame 7 can be driven to deflect through the thread fit with the thread frame 11. During the deflection of the deflection frame 7, the brake pad 8 can be driven to press against the outer side of the brake ring 6. When the brake pad 8 contacts the brake ring 6, the main shaft 2 can be braked through friction, and the braking force can be adjusted by the moving position of the thread frame 11, effectively avoiding locking.

[0028] When it is necessary to overhaul the inside of the fixed cover 3, the pull - ring 53 is pulled downward. The pull - ring 53 drives the limit frame 52 to move downward, and the limit frame 52 compresses the spring 54. When the limit frame 52 disengages from the inspection cover 4, the inspection cover 4 can be removed from the fixed cover 3, making it more convenient to overhaul the inside of the fixed cover 3.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An electric hoist brake structure, comprising a hoist (1), characterized in that: A main shaft (2) is arranged inside the hoist (1), a fixed cover (3) is fixedly connected to the right end of the hoist (1), an inspection cover (4) is slidably connected to the outside of the fixed cover (3), a disassembly mechanism (5) is arranged on the fixed cover (3), two symmetrically distributed deflection frames (7) are hinged inside the fixed cover (3), a brake pad (8) is fixedly connected to the side of the deflection frame (7) close to the main shaft (2), a fixed frame (9) is fixedly connected to the upper end of the fixed cover (3), a forward and reverse screw rod (10) is installed inside the fixed frame (9) through a bearing, two symmetrically distributed threaded frames (11) are connected to the outside of the forward and reverse screw rod (10) through threads, a large gear (12) is fixedly connected to the outside of the forward and reverse screw rod (10), and a motor (13) is fixedly connected to the upper end of the fixed cover (3).

2. The electric hoist brake structure according to claim 1, characterized in that: A brake ring (6) is fixedly connected to the outer side of the main shaft (2); the brake ring (6) is located between the two brake pads (8) and does not contact the brake pads (8).

3. The electric hoist brake structure according to claim 1, characterized in that: The threaded frame (11) is movably connected to the deflection frame (7), and the deflection frame (7) is in contact with the inspection cover (4).

4. The electric hoist brake structure according to claim 1, characterized in that: A small gear (14) is fixedly connected to the outer side of the output shaft of the motor (13), and the small gear (14) is meshed with the large gear (12).

5. The electric hoist brake structure according to claim 1, characterized in that: The disassembly mechanism (5) comprises a guide frame (51), the lower end of the fixed cover (3) is fixedly connected to the guide frame (51), the outer side of the guide frame (51) is slidably connected to a limit frame (52), the outer side of the limit frame (52) is fixedly connected to a pull ring (53), and the outer side of the rod of the guide frame (51) is provided with a spring (54).

6. The electric hoist brake structure according to claim 5, characterized in that: One end of the spring (54) is fixedly connected to the guide frame (51), and the other end of the spring (54) is fixedly connected to the limiting frame (52).

7. The electric hoist brake structure according to claim 5, characterized in that: The limiting frame (52) is slidably connected to the inspection cover (4), and the main shaft (2) passes through the inspection cover (4) and is not slidably connected to the inspection cover (4).

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