CN215580352U

CN215580352U - Overload protection device of winch motor

Info

Publication number: CN215580352U
Application number: CN202121041379.2U
Authority: CN
Inventors: 陈�峰; 王键; 唐瑞瑞
Original assignee: Eurocrane China Co ltd
Current assignee: Eurocrane China Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-01-18
Anticipated expiration: 2031-05-14

Abstract

The utility model relates to an overload protection device of a winch motor, which is arranged on a winch main body, wherein the winch main body comprises a base, a motor, a winding drum and a driven disc, the motor, the winding drum and the driven disc are all arranged on the base, the motor drives the winding drum to rotate, the winding drum and the driven disc are synchronously arranged in a rotating mode, the overload protection device comprises a rotating mechanism, a sensor and a control box, the rotating mechanism is arranged on the winding drum, the sensor is arranged on the base and is in signal connection with the control box, and the control box is electrically connected with the motor. According to the overload protection device for the motor of the winch, when the steel wire rope is overloaded, the first bolt is broken, so that the winding drum and the driven disc rotate reversely, the rotating mechanism rotates into the sensing area of the sensor, the control box controls the motor to stop working according to the sensing signal of the sensor, the motor is prevented from being damaged due to the reverse rotation of the winding drum, and the maintenance cost of the overload of the steel wire rope is reduced.

Description

Overload protection device of winch motor

Technical Field

The utility model relates to the technical field of hoisting devices, in particular to an overload protection device for a winch motor.

Background

A winch, a small and light hoisting device for hoisting or pulling a heavy object by winding a wire rope or a chain around a drum, also called a winch, is one of hoisting devices, and is often used for hoisting or pulling a heavy object.

When the hoist engine is in use, if the heavy object is overloaded, the traction torque of the hoist engine is exceeded, so that the steel wire rope winding drum of the hoist engine rotates reversely, the motor is damaged at the moment, and the maintenance cost is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to solve the technical problem of motor damage caused by the reverse rotation of a steel wire rope reel caused by heavy object overload in the prior art.

In order to solve the technical problems, the utility model provides an overload protection device for a winch motor, which is arranged on a winch main body, wherein the winch main body comprises a base, a motor, a winding drum and a driven disc, the motor, the winding drum and the driven disc are all arranged on the base, the motor drives the winding drum to rotate, the winding drum and the driven disc are synchronously arranged in a rotating mode, the overload protection device comprises a rotating mechanism, a sensor and a control box, the rotating mechanism is arranged on the winding drum, the sensor is arranged on the base and is in signal connection with the control box, the control box is electrically connected with the motor, first through holes are formed in the winding drum and the driven disc, a first bolt penetrates through the first through holes, and the winding drum and the driven disc synchronously rotate through the first bolt;

when the steel wire rope wound on the winding drum is overloaded, the first bolt is broken, the winding drum and the driven disc rotate relatively to enable the rotating mechanism to rotate to the sensing area of the sensor, and the control box controls the motor to stop working according to the sensing signal of the sensor.

In one embodiment of the utility model, the rotating mechanism comprises a fixed rod arranged transversely and a rotating member sleeved on the fixed rod, one end of the fixed rod is connected with the winding drum, the rotating member rotates around the axial lead of the fixed rod, a concave part is arranged on the driven disc, a convex part matched with the concave part is arranged on the rotating member, and the convex part of the rotating member is embedded in the concave part of the driven disc; when the steel wire rope wound on the winding drum is overloaded, the winding drum and the driven disc rotate relatively to enable the rotating piece to rotate around the axis of the fixed rod, and the rotating piece rotates to the sensing area of the sensor.

In one embodiment of the present invention, a sensing portion is further disposed on a side of the rotating member facing the sensor.

In one embodiment of the utility model, the drum is provided with a rope holder for winding a steel wire rope.

In one embodiment of the present invention, the rope holder is provided with a spiral groove along an axial direction of the winding drum, and the steel wire rope is disposed in the groove.

In one embodiment of the present invention, a bearing is disposed at an end of the winding drum facing away from the motor, and the bearing is sleeved on the winding drum.

In an embodiment of the utility model, a bearing seat is further sleeved on the bearing, and the bearing seat is connected with the base.

In one embodiment of the utility model, an oil cup for storing lubricating oil is further arranged above the bearing, and the oil cup is connected to the bearing through a pipeline.

In one embodiment of the utility model, the motor is connected to the drum through a speed reducer.

In one embodiment of the utility model, a bracket is arranged on the base, and the control box is arranged on the bracket.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

according to the overload protection device for the motor of the winch, when the steel wire rope is overloaded, the first bolt is broken, so that the winding drum and the driven disc rotate reversely, the rotating mechanism rotates into the sensing area of the sensor, the control box controls the motor to stop working according to the sensing signal of the sensor, the motor is prevented from being damaged due to the reverse rotation of the winding drum, and the maintenance cost of the overload of the steel wire rope is reduced.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of an overload protection apparatus of a hoist motor in a preferred embodiment of the present invention;

fig. 2 is a sectional view taken along a-a of the overload protecting apparatus of the hoist motor shown in fig. 1 when the overload protecting apparatus is not overloaded;

fig. 3 is a sectional view taken along a-a direction when the overload protecting apparatus of the hoist motor shown in fig. 1 is overloaded.

The specification reference numbers indicate: 1. a base; 2. a motor; 3. a reel; 4. a driven plate; 5. a sensor; 6. a first latch; 7. fixing the rod; 8. a rotating member; 9. a sensing part; 10. a rope frame; 11. a bearing; 12. a bearing seat; 13. an oil cup; 14. and a control box.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

It will be understood that when an element is referred to as being "disposed on," "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first," "second," "third," and the like in the description herein do not denote any particular quantity or order, but rather are used to distinguish one element from another.

In some embodiments, referring to fig. 1, the overload protection device for the motor of the winch of the present invention is disposed on a winch main body, the winch main body includes a base 1, a motor 2, a winding drum 3 and a driven plate 4, the motor 2, the winding drum 3 and the driven plate 4 are all disposed on the base 1, the motor 2 drives the winding drum 3 to rotate, the winding drum 3 and the driven plate 4 are synchronously rotatably disposed, and the overload protection device includes a rotating mechanism, a sensor 5 and a control box 14, the rotating mechanism is disposed on the winding drum 3, the sensor 5 is disposed on the base 1 and is in signal connection with the control box 14, the control box 14 is electrically connected to the motor 2, first through holes are disposed on the winding drum 3 and the driven plate 4, a first bolt 6 is inserted into the first through hole, and the winding drum 3 and the driven plate 4 synchronously rotate through the first bolt 6;

when the steel wire rope wound on the winding drum 3 is overloaded, the first bolt 6 is broken, the winding drum 3 and the driven disc 4 rotate relatively to enable the rotating mechanism to rotate to the sensing area of the sensor 5, and the control box 14 controls the motor 2 to stop working according to the sensing signal of the sensor 5. When the steel wire rope is overloaded, the winding drum 3 rotates reversely at ordinary times under the driving of a heavy object, so that the rotation direction of the winding drum is opposite to that of the driven disc 4, the first bolt 6 placed in the first through hole is broken under two reverse moments, the winding drum 3 and the driven disc 4 rotate relatively, the rotating mechanism rotates to the sensing area of the sensor 5 at the moment, the sensing area of the sensor 5 changes, a signal is sent to the control box 14, the control box 14 controls the motor 2 to stop working after receiving the signal, and therefore the condition that the motor 2 is damaged by the winding drum 3 which rotates reversely is avoided.

In some embodiments, referring to fig. 1, the winding drum 3 and the driven disc 4 are both provided with a first through hole, and a first bolt 6 is arranged in the first through hole; when the steel wire rope wound on the winding drum 3 is overloaded, the first bolt 6 is broken, and the winding drum 3 and the driven disc 4 rotate relatively to enable the rotating mechanism to rotate to the sensing area of the sensor 5. When the steel wire rope is overloaded, the winding drum 3 is driven by a heavy object to rotate reversely at ordinary times, so that the rotation direction of the winding drum is opposite to that of the driven disc 4, the first bolt 6 placed in the first through hole is broken under two opposite moments, the winding drum 3 and the driven disc 4 rotate relatively, and the rotating mechanism rotates to the sensing area of the sensor 5. It should be noted that the first latch 6 is simultaneously disposed in the first through holes of the winding drum 3 and the driven disc 4, so as to ensure that the winding drum 3 and the driven disc 4 rotate synchronously during normal use.

In some embodiments, referring to fig. 1-3, the rotating mechanism includes a fixed rod 7 transversely disposed and a rotating member 8 sleeved on the fixed rod 7, one end of the fixed rod 7 is connected to the winding drum 3, the rotating member 8 rotates around the axial lead of the fixed rod 7, the driven disc 4 is provided with a concave portion, the rotating member 8 is provided with a convex portion matching with the concave portion, and the convex portion of the rotating member 8 is embedded in the concave portion of the driven disc 4; when the steel wire rope wound on the winding drum 3 is overloaded, the winding drum 3 and the driven disc 4 rotate relatively to each other, so that the rotating piece 8 rotates around the axis of the fixed rod 7, and the rotating piece 8 rotates to the sensing area of the sensor 5. When the steel wire rope is overloaded, the first bolt 6 is broken, so that the winding drum 3 and the driven disc 4 rotate relatively, at the moment, the convex part of the rotating piece 8 rotates out of the concave part of the driven disc 4, the rotating piece 8 rotates into the sensing area of the sensor 5, the driven disc 4 still rotates at the moment, the sensor 5 is fixed, and the rotating piece 8 per se also does circular motion along with the driven disc 4, so that when the rotating piece 8 does not rotate in the sensing area of the sensor 5, the rotating piece 8 does circular motion along with the rotating piece 8, the rotating piece will pass through the sensing area of the sensor 5, and the motor 2 stops working.

In some embodiments, referring to fig. 2-3, the side of the rotating member 8 facing the sensor 5 is further provided with a sensing portion 9. The special induction part 9 is arranged to improve the induction precision of the sensor 5, so that the situation that the motor 2 stops untimely due to low induction precision is avoided.

In one embodiment, referring to fig. 1, a rope holder 10 is provided on the drum 3 to wind the steel rope. By providing the rope holder 10 to enlarge the winding radius of the wire rope, the reverse rotation speed of the drum 3 is reduced when the wire rope is overloaded.

Preferably, as shown in fig. 1, the rope holder 10 is provided with a spiral-shaped slot along the axial direction of the drum 3, and the steel wire rope is disposed in the slot. The steel wire rope is wound in the clamping groove by the clamping groove, so that the winding condition of the steel wire rope is avoided.

In some embodiments, referring to fig. 1, a bearing 11 is disposed at an end of the winding drum 3 facing away from the motor 2, and the bearing 11 is disposed on the winding drum 3. A bearing 11 is provided at one end of the drum 3 to support the drum 3, so that the drum 3 is more stable when rotated.

Preferably, referring to fig. 1, a bearing seat 12 is further sleeved on the bearing 11, and the bearing seat 12 is connected with the base 1. The bearing 11 is supported by the bearing housing 12 to further improve the stability of the drum 3 when rotating.

In some embodiments, referring to fig. 1, an oil cup 13 for storing lubricating oil is further disposed above the bearing 11, and the oil cup 13 is connected to the bearing 11 through a pipeline. The lubricating state of the bearing 11 is kept by the oil cup 13, and the lubricating oil is conveniently replenished in time.

In some embodiments, referring to fig. 1, the motor 2 is connected to the drum 3 through a reducer. The stability of the rotation of the drum 3 can be improved by keeping the drum 3 rotated at a stable speed by the decelerator.

In some embodiments, referring to fig. 1, the base 1 is provided with a bracket on which the control box 14 is disposed. The control box 14 is placed on the support, the height of the control box 14 is raised, and operations such as wire connection and maintenance are facilitated.

The working principle of the utility model is as follows:

when the steel wire rope is broken, the first bolt 6 is broken, so that the winding drum 3 and the driven disc 4 rotate relatively, at the moment, the convex part of the rotating piece 8 is separated from the concave part of the driven disc 4, the rotating piece 8 rotates around the axial lead of the fixed rod 7, so that the rotating member 8 rotates into the sensing area of the sensor 5, if the rotating member 8 is not in the sensing area of the sensor 5, when the rotating member 8 moves circularly along with the driven disc 4, the rotating part 8 passes through the sensing area of the sensor 5, at the moment, the sensor 5 receives a sensing signal and sends a stop signal to the control box 14, the control box 14 controls the motor 2 to stop working after receiving the stop signal, thereby achieving the purpose of protecting the motor 2 from being damaged when the steel wire rope is broken, because the protection device is arranged on the winch main body, the extra space occupied by the protection device is less, and the space utilization rate is higher.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the spirit or scope of the utility model.

Claims

1. The utility model provides an overload protection device of hoist engine motor, sets up in the hoist engine main part, the hoist engine main part includes base, motor, reel and driven plate, the motor the reel with the driven plate all sets up on the base, motor drive the reel rotates, the reel with the synchronous rotation of driven plate sets up its characterized in that: the winding drum comprises a rotating mechanism, a sensor and a control box, wherein the rotating mechanism is arranged on the winding drum, the sensor is arranged on the base and is in signal connection with the control box, the control box is electrically connected with the motor, first through holes are formed in the winding drum and the driven disc, a first bolt penetrates through the first through holes, and the winding drum and the driven disc synchronously rotate through the first bolt;

2. The overload protection apparatus of a hoist motor according to claim 1, wherein: the rotating mechanism comprises a fixed rod and a rotating part, the fixed rod is transversely arranged, the rotating part is sleeved on the fixed rod, one end of the fixed rod is connected with the winding drum, the rotating part rotates around the axial lead of the fixed rod, a concave part is arranged on the driven disc, a convex part matched with the concave part is arranged on the rotating part, and the convex part of the rotating part is embedded in the concave part of the driven disc; when the steel wire rope wound on the winding drum is overloaded, the winding drum and the driven disc rotate relatively to enable the rotating piece to rotate around the axis of the fixed rod, and the rotating piece rotates to the sensing area of the sensor.

3. The overload protection device for the motor of the winding machine as claimed in claim 2, wherein: one side of the rotating piece facing the sensor is also provided with a sensing part.

4. The overload protection apparatus of a hoist motor according to claim 1, wherein: and the winding drum is provided with a rope frame for winding a steel wire rope.

5. The overload protection device for the motor of the winding machine as claimed in claim 4, wherein: the rope frame is provided with a spiral clamping groove along the axial direction of the winding drum, and the steel wire rope is arranged in the clamping groove.

6. The overload protection apparatus of a hoist motor according to claim 1, wherein: the winding drum is back to one end of the motor is provided with a bearing, and the bearing is sleeved on the winding drum.

7. The overload protection device for the motor of the winding machine as claimed in claim 6, wherein: and a bearing seat is further sleeved on the bearing and connected with the base.

8. The overload protection device for the motor of the winding machine as claimed in claim 6, wherein: an oil cup for storing lubricating oil is further arranged above the bearing and connected to the bearing through a pipeline.

9. The overload protection apparatus of a hoist motor according to claim 1, wherein: the motor is connected with the winding drum through a speed reducer.

10. The overload protection apparatus of a hoist motor according to claim 1, wherein: the base is provided with a support, and the control box is arranged on the support.