Anti-slip hook protection device for crane

Abstract

The utility model provides a crane anti-slip hook protection device which comprises a trolley underframe, a roller, a speed reducer and a lifting motor, the roller is rotatably arranged on the trolley underframe, the speed reducer and the lifting motor drive the roller to rotate, a brake is arranged on the lifting motor, a locking disc is arranged at the end of the roller, and the locking disc is connected with the roller. An electromagnetic locking mechanism for locking or releasing the locking disc and the trolley chassis is arranged on the trolley chassis; according to the utility model, when the lifting motor is braked through the brake, the electromagnetic locking mechanism is powered off, and after the electromagnetic locking mechanism is powered off, the locking disc and the trolley chassis are locked and the rotation of the roller is limited, so that the hook slipping is avoided, and the operation safety is improved; the electromagnetic locking mechanism releases the locking disc and the trolley chassis, and at the moment, the lifting motor is started immediately for lifting.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a crane hook slip prevention protection device. Background Art

[0002] Crane hook slipping means that the crane hook automatically descends at a low or high speed when the operator does not perform any downward operation. This situation is mainly caused by a failure in the crane brake pad or brake system. The occurrence of such a failure will cause a considerable safety accident.

[0003] Most of the current cranes use brakes that cooperate with the lifting motor to prevent the crane from slipping hooks. For example, in the prior art, the Chinese utility model patent document with the authorization announcement number CN212101707U discloses a crane lifting anti-slip hook circuit and a crane thereof. Through the delay effect of the delay relay, the upward torque of the lifting motor can be maintained for a period of time, and then the brake is used for braking. This braking method has a low cost and can prevent the hook from slipping to a certain extent. However, if the brake is used alone for braking, the braking effect will be weakened after the brake fails or wears out, and the hook will still slip, posing a safety hazard.

[0004] Therefore, it is necessary to design a crane anti-hook slip protection device that can lock the drum when the lifting motor stops to avoid hook slipping and improve operation safety to solve the current technical problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a crane anti-hook slip protection device which locks the drum when the hoisting motor stops to avoid hook slipping and improve operation safety.

[0006] The technical solution of the utility model is: a crane anti-hook slip protection device, including a trolley frame, the trolley frame, a roller rotatably arranged on the trolley frame and a reducer and a lifting motor for driving the roller to rotate, the lifting motor is provided with a brake, a locking disk is provided at the end of the roller, and an electromagnetic locking mechanism for locking or releasing the locking disk and the trolley frame is provided on the trolley frame.

[0007] The locking disk is provided with locking holes in a circumferential array, the electromagnetic locking mechanism has a shell, an armature is slidably arranged inside the shell, an electromagnet is arranged inside the shell for magnetically attracting or releasing one side of the armature, a locking bolt matching the locking hole is arranged on the other side of the armature, and an elastic support component is arranged at one end of the shell, and the elastic support component applies an elastic force to the armature toward the locking hole.

[0008] A guide rod is fixedly provided on the end of the armature facing away from the locking bolt, the elastic support assembly has a support tube fixedly provided on the shell body at one end facing away from the locking bolt, a support plate is fixedly provided on the end of the support tube facing away from the shell body, a push plate is fixedly provided on the end of the guide rod inside the support tube, the push plate is slidably provided inside the support tube, and a spring is provided between the push plate and the support plate.

[0009] The push plate is a circular Teflon plate that matches the interior of the support tube.

[0010] One end of the locking bolt corresponding to the locking hole is provided with a chamfer.

[0011] A slide cylinder is sleeved inside the electromagnet, and the guide rod is slidably arranged inside the slide cylinder.

[0012] The roller has a roller body, and both ends of the roller body are provided with end plates; the locking disk has a locking disk body, and the locking holes are arranged in a circular array on the locking disk body.

[0013] The locking disk body has twenty-four locking holes arranged in a circular array.

[0014] The locking disks are arranged at both ends of the roller.

[0015] The beneficial effects of the utility model are as follows: in the utility model, while the lifting motor is braked by the brake, the electromagnetic locking mechanism is powered off. After the electromagnetic locking mechanism is powered off, the locking plate and the trolley frame are locked to limit the rotation of the roller, thereby avoiding the hook slipping and improving the operation safety. Before starting the lifting motor, the electromagnetic locking mechanism is powered on first, and the electromagnetic locking mechanism releases the locking plate and the trolley frame. At this time, the lifting motor is immediately started for lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the structure of the crane anti-hook slip protection device.

[0017] Figure 2 It is a structural schematic diagram of the roller in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the electromagnetic locking mechanism in the utility model. DETAILED DESCRIPTION

[0019] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limitations.

[0020] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 and 2 As shown, the crane anti-hook slip protection device comprises a trolley frame 1, a trolley frame 1, a roller 5 and a reducer 2 and a lifting motor 3 are rotatably arranged on the trolley frame 1 to drive the roller 5 to rotate, a brake 4 is arranged on the lifting motor 3, a locking disk 6 is arranged at the end of the roller 5, and an electromagnetic locking mechanism 7 for locking or releasing the locking disk 6 and the trolley frame 1 is arranged on the trolley frame 1; in this embodiment, when the electromagnetic locking mechanism 7 is powered on, the electromagnetic locking mechanism 7 releases the locking disk 6 and the trolley frame 1, and when the electromagnetic locking mechanism 7 is powered off, the electromagnetic lock 7 is released. The fixing mechanism 7 locks the locking plate 6 and the trolley frame 1; while the lifting motor 3 is braked by the brake 4, the electromagnetic locking mechanism 7 is powered off. After the electromagnetic locking mechanism 7 is powered off, the locking plate 6 and the trolley frame 1 are locked to limit the rotation of the roller, thereby avoiding the hook slipping and improving the operation safety. Before starting the lifting motor 3, the electromagnetic locking mechanism 7 is energized first, and the electromagnetic locking mechanism 7 releases the locking plate 6 and the trolley frame 1. At this time, the lifting motor 3 is immediately started to run forward and reverse alternately for several times, and then the lifting motor 3 is started for lifting.

[0022] In some embodiments, the locking disk 6 has locking holes 62 in a circular array, the electromagnetic locking mechanism 7 has a shell 71, an armature 73 is slidably arranged inside the shell 71, an electromagnet 74 for magnetically attracting or releasing one side of the armature 73 is arranged inside the shell 71, a locking bolt 72 matching the locking hole 62 is arranged on the other side of the armature 73, and an elastic support component is arranged at one end of the shell 71, and the elastic support component applies an elastic force to the armature 73 toward the locking hole 62; when the electromagnetic locking mechanism 7 is energized, the electromagnet 74 is energized to generate magnetic force to magnetically attract the armature 73, and the armature 73 is adsorbed on one end of the electromagnet 74, and the locking bolt 72 is separated from the locking disk 6, and the lifting motor 3 is started forward and reverse. When the locking cam 72 is in the state of being moved, the locking cam 72 is in the state of being moved forward, and the locking cam 72 is in the state of being moved forward, so that the locking cam 72 can be pushed and pulled out of the locking cam 72 by the force of the force of the force of the force.

[0023] In some embodiments, a guide rod 731 is fixedly provided on one end of the armature 73 facing away from the locking bolt 72, and the elastic support assembly has a support tube 77 fixedly provided on the shell 71 at one end facing away from the locking bolt 72, and a support plate 78 is fixedly provided on the end of the support tube 77 facing away from the shell 71, and a push plate 76 is fixedly provided on the end of the guide rod 731 inside the support tube 77. The push plate 76 is slidably provided inside the support tube 77, and a spring 79 is provided between the push plate 76 and the support plate 78. The spring 79 applies an elastic force to the push plate 76, and the push plate 76 is connected to the guide rod 731, the armature 73, and the locking bolt 72, so as to apply an elastic force to the armature 73 toward the locking hole 62.

[0024] In some embodiments, the push plate 76 is a circular Teflon plate that matches the interior of the support tube 77. The Teflon plate is fixed to the end of the guide rod 731 by bolts, and one end of the spring 79 is against one side of the Teflon plate.

[0025] In some embodiments, a chamfer 721 is provided at one end of the locking bolt 72 corresponding to the locking hole 62 . The chamfer 721 can reduce the end of the locking bolt 72 , making it easier to insert the locking bolt 72 into the locking hole 62 .

[0026] In some embodiments, a slide cylinder 75 is mounted inside the electromagnet 74 , and the guide rod 731 is slidably disposed inside the slide cylinder 75 .

[0027] In some embodiments, the roller 5 has a roller body 51, and both ends of the roller body 51 have end plates 52; the locking disk 6 has a locking disk body 61, and the locking disk body 61 is welded and fixed on one side of the end plate 52, and the locking holes 62 are arranged in a circular array on the locking disk body 61.

[0028] In some embodiments, the locking disk body 61 has twenty-four locking holes 62 in a circumferential array.

[0029] In some embodiments, locking plates 6 are provided at both ends of the roller 5 , and the corresponding trolley chassis 1 is provided with two electromagnetic locking mechanisms corresponding to the two locking plates 6 .

[0030] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0031] The above-mentioned embodiments only express some implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A crane hook slip protection device, characterized in that: The invention comprises a trolley frame, on which a roller is rotatably arranged, and a reducer and a lifting motor for driving the roller to rotate are arranged, the lifting motor is provided with a brake, a locking disk is arranged at the end of the roller, and an electromagnetic locking mechanism for locking or releasing the locking disk and the trolley frame is arranged on the trolley frame.

2. The crane hook slip protection device according to claim 1 is characterized in that: The locking disk is provided with locking holes in a circumferential array, the electromagnetic locking mechanism has a shell, an armature is slidably arranged inside the shell, an electromagnet is arranged inside the shell for magnetically attracting or releasing one side of the armature, a locking bolt matching the locking hole is arranged on the other side of the armature, and an elastic support component is arranged at one end of the shell, and the elastic support component applies an elastic force to the armature toward the locking hole.

3. The crane hook slip protection device according to claim 2 is characterized in that: A guide rod is fixedly provided on the end of the armature facing away from the locking bolt, the elastic support assembly has a support tube fixedly provided on the shell body at one end facing away from the locking bolt, a support plate is fixedly provided on the end of the support tube facing away from the shell body, a push plate is fixedly provided on the end of the guide rod inside the support tube, the push plate is slidably provided inside the support tube, and a spring is provided between the push plate and the support plate.

4. The crane hook slip protection device according to claim 3 is characterized in that: The push plate is a circular Teflon plate that matches the interior of the support tube.

5. The crane hook slip protection device according to claim 2 is characterized in that: One end of the locking bolt corresponding to the locking hole is provided with a chamfer.

6. The crane hook slip protection device according to claim 3 is characterized in that: A slide cylinder is sleeved inside the electromagnet, and the guide rod is slidably arranged inside the slide cylinder.

7. The crane hook slip protection device according to claim 2, characterized in that: The roller has a roller body, and both ends of the roller body are provided with end plates; the locking disk has a locking disk body, and the locking holes are arranged in a circular array on the locking disk body.

8. The crane hook slip protection device according to claim 7, characterized in that: The locking disk body has twenty-four locking holes arranged in a circular array.

9. The crane hook slip protection device according to claim 1, characterized in that: The locking disks are arranged at both ends of the roller.

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