JP3150539U - Overload brake device for hoisting machine - Google Patents

Abstract

Disclosed is a brake device that improves safety by taking measures against overload. A transmission shaft includes a transmission shaft, a claw wheel base, a brake bush, a brake, and a drive wheel. A transmission wheel for outputting power is fixed to a front end of the transmission shaft. A pair of claw wheels 23 and a detent are pivotally attached to the peripheral surface of the first shaft 21 that is coaxially connected to the transmission shaft 10 and protrudes in the axial direction of the claw wheel base 20. The brake bush 30 is engaged with the transmission shaft 10 at all times, the guide inclined groove 33 is formed in the end face of the second retaining disk 32, and the brake 40 is connected to the second shaft 31 of the brake bush 30. The drive wheel 50 pivotally attached to the third shaft 41 is rotatable in the forward / reverse direction by receiving power, and a ball groove 51 is recessed in the end surface thereof. A ball in the space between the ball groove 51 It is rotatably accommodated. [Selection] Figure 1

Description

  The present invention relates to a safety means for machine operation, and more particularly to an overload brake device for a hoisting machine.

  Conventional hoisting machines (for example, cranes and elevators) are driven by a motor, and the power from the motor moves the article up and down via a transmission wheel, and the friction force generated by brake facing is used to stop the article. . However, if the item to be lifted / lowered is too heavy depending on the use conditions, the power mechanism is broken or the item crashes rapidly. In addition, the motor or the like may be destroyed as the goods crash.

  The main purpose of the present invention is to solve the above-mentioned problems. When the claw brake and the sliding clutch are aligned together, and the brake bushing does not move when it is desired to roll up the article in an overload state. When the ball reaches the storage end of the ball groove along the guide inclined groove, the driving wheel becomes idle, and it becomes impossible to wind up the item to be rolled up, and when the item is to be suspended, A hoisting machine that can reach the holding end of the ball groove, the ball is locked to the stopping end of the guide inclined groove, and the brake bush is driven to rotate to the right, thereby suspending the article. It is to provide an overload braking device for a vehicle.

A first device of the present application is an overload brake device for a hoisting machine including a transmission shaft, a claw stand, a brake bush, a brake, and a drive wheel, wherein the transmission shaft is pivoted horizontally. A transmission wheel for outputting power is fixed to the front end, a spiral is provided on the peripheral surface of the middle stage to form a screw shaft portion, and an external screw is provided on the peripheral surface of the end to provide a pivot. The claw carriage is connected to the transmission shaft coaxially and includes a first shaft protruding in the axial direction and a first retaining disk, and the peripheral surface of the first shaft A pair of ratchet wheels and a detent are pivotally attached, the detents are always meshed with the ratchet wheel, and the brake bush is connected to the screw shaft portion of the transmission shaft. A second shaft projecting in the axial direction thereof, and a second shaft A stop disk, and at least one guide inclined groove is recessed in the end surface of the second pressing disk, and a front end of the guide inclined groove is formed in the guide inclined portion, and the rear of the guide inclined groove An end is formed at the stop end, and the brake includes a third shaft that is pivotally attached to the second shaft of the brake bush and protrudes in the axial direction thereof, and a third retaining disk, In the axial direction of the third retaining disc, an elastic element capable of adjusting elasticity is pivotally attached, and the drive wheel is pivotally attached to the third shaft, and can be rotated in the forward / reverse direction by receiving power. In the end surface, a ball groove is recessed according to the guide inclined groove of the second holding disc, and the ball groove has a front end formed at the storage end, and a rear end at the storage end. It is formed at the retaining end shallower than the depth of The space consists of serial inclined guide groove and the ball groove is hoisting machine overload brake hanger and wherein the balls are freely movable.
In the second device of the present application, in the overload brake application device for a hoisting machine, a detent biased by a spring is always meshed with the teeth of the claw wheel, and the rotation direction of the claw wheel is To regulate.
A third device of the present application is the above-described overload brake device for a hoisting machine, wherein brake facings are respectively provided on end surfaces of the claw wheel and the drive wheel.

  According to the overload brake application device for a hoist according to the present invention, the claw wheel brake and the sliding clutch are integrally aligned, and in the overload state, when it is desired to roll up the article, the brake bush does not move, When the ball reaches the storage end of the ball groove along the guide inclined groove, the driving wheel is idled, the item to be rolled up cannot be rolled up, and the ball is moved by the driving foil when it is desired to suspend the item. The ball is pushed to the stop end of the ball groove, the ball is locked to the stop end of the guide inclined groove, and the brake bush is driven to rotate to the right, so that the product can be suspended. Have.

It is sectional drawing which shows the combined state of the overload brake device for hoisting machines of this invention. It is a schematic diagram which shows the use condition of the claw wheel which concerns on this invention. It is sectional drawing of the state by which the ball groove was match | combined with the guide inclination groove | channel of this invention. It is a schematic diagram which shows the state in which the drive wheel of this invention is driven in the forward / reverse direction. It is a schematic diagram which shows operation | movement when the winding machine is overloading at the time of use. It is a schematic diagram which shows operation | movement when the wire of the winding machine which concerns on this invention is discharge | released.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, FIG. 1 to FIG. 3 will be referred to.

  The overload brake application device for a hoist according to the present invention is applied to a hoist such as a crane or an elevator, for example, and includes a transmission shaft 10, a claw chassis 20, a brake bush 30, a brake 40, and a drive wheel 50. And including.

  The transmission shaft 10 is pivotally mounted horizontally, and a transmission wheel 11 (in this embodiment, a sprocket) for outputting power is fixed to the front end of the transmission shaft 10, and a spiral is provided on the peripheral surface of the middle stage. Thus, a screw shaft portion 12 is formed, and an outer screw is provided on the peripheral surface of the end portion of the screw shaft portion 12 to form a pivot portion 13.

  The claw carriage 20 is coaxially connected to the transmission shaft 10 and includes a first shaft 21 projecting in the axial direction and a first retaining disk 22, and as shown in FIG. 2, the first shaft A pair of claw wheels 23 and a detent 24 are pivotally attached to the peripheral surface of 21, and the detent 24 is urged by a spring 241 and meshes with the claw wheel 23 at all times. The claw wheel 23 has a function of regulating the rotatable direction, and a brake facing 25 is provided on the end surface of the claw wheel 23.

  The brake bush 30 is screwed into the threaded shaft portion 12 of the transmission shaft 10, and includes a second shaft 31 protruding in the axial direction and a second retaining disk 32, and the second retaining disk 32. At least one guide inclined groove 33 is recessed in the end surface of the guide, and as shown in FIG. 3, the front end of the guide inclined groove 33 is formed in the guide inclined portion 331, and the rear end of the guide inclined groove 33 is the stop end. 332 is formed.

  The brake 40 is pivotally attached to the second shaft 31 of the brake bush 30 and includes a third shaft 41 projecting in the axial direction and a third retaining disc 42. In the axial direction of the third retaining disk 42, an elastic element 43 capable of adjusting the elasticity is pivoted. The elastic element 43 may be a spring and is pivotally attached to the transmission shaft 10 by a receiving bar 431 and a stop bar bush 432, and the stop bar bush 432 is interposed via a bearing 433, a bush 434, an adjustment nut 435, and a fixed nut 436. It is fastened to the pivot part 13.

  Thereby, the tightening state of the claw wheel base 20, the brake bush 30, and the brake 40 can be controlled. Further, by adjusting the position of the adjustment nut 435 in the axial direction, it is possible to adjust the tightening force of the retaining bar bush 432 and the bush 434 in the axial direction with respect to the spring, and to set by adjusting the tightening force. Torque is adjusted.

  The drive wheel 50 is pivotally attached to the third shaft 41 and can be rotated in the forward and reverse directions by receiving power. A ball groove 51 is formed on an end surface of the drive wheel 50 in accordance with the guide inclined groove 33 of the second retaining disk 32. Is recessed.

  As shown in FIG. 3, the front end of the ball groove is formed at the storage end 511, and the rear end thereof is formed at a holding end 512 that is shallower than the depth of the storage end 511, and the guide inclined groove 33, the ball groove 51, The ball 52 can freely move according to the drive wheel 50 in a space formed by the following, and a brake facing 53 is provided on an end surface of the drive wheel 50.

Next, the use state of the present invention will be described with reference to FIGS.
In the overload brake device for a hoist according to the present invention, the adjustment nut 435 is adjusted so as to increase the elasticity of the elastic element 43, and the frictional force between the both ends of the drive wheel 50, the brake bush 30 and the brake 40 is increased. To increase. Then, the driving wheel 50 cannot slide unless the torque is larger. Conversely, when the adjustment nut 435 is adjusted so as to reduce the elasticity of the elastic element 43, the drive wheel 50 can slide even with a smaller torque.

  Further, as shown in FIG. 3, the ball groove 51 recessed in the end face of the drive wheel 50 is aligned with the guide inclined groove 33 recessed in the end face of the second retaining disk 32 of the brake bush 30. The ball 52 movable in the space formed by the ball groove 51 and the guide inclined groove 33 is displaced according to the rotation of the drive wheel 50, that is, the drive wheel 50 and the brake bush 30 are rotated relative to each other. Sometimes, depending on the situation, the ball 52 operates as one of the following three forms.

(1) When the hoisting operation is in a normal state, as shown in FIG. 3, the ball 52 is movable into a space constituted by the ball groove 51 and the guide inclined groove 33.

(2) In the overload state, when the article is to be rolled up, the drive wheel 50 is rotated to the left, the brake bush 30 is not moved, and the ball 52 is stored on the right side of the ball groove 51 along the guide inclined groove 33. When the end 511 is reached, the driving wheel is idled and the article to be rolled up cannot be wound up.

(3) In the overload state, when the article is to be suspended, the ball 52 falls to the guide inclined groove 33 and is moved to the right by the right rotation of the drive wheel 50, and is on the right side of the guide inclined groove 33. The retaining end 332 and the retaining end 512 on the left side of the ball groove 51 are latched. As a result, the brake bush 30 is pressed against the drive wheel 50, and the brake bush 30 and the drive wheel 50 rotate in synchronization with each other, so that the article can be suspended.

  When it is desired to roll up the article in a state where it is not overloaded, the brake bush 30, the drive wheel 50, and the brake 40 come into close contact with each other and the brake bush 30 moves along the screw shaft portion 12. Then, the second pressing disc 32 of the brake bush 30 and the ratchet wheel 23 are in close contact with each other. At this time, as shown in FIG. 2, the ratchet wheel 23 that can rotate in one direction slides synchronously, whereby the transmission wheel 11 can be rotated to wind up the article.

  When the power from the power source is stopped, the transmission shaft 10, the claw wheel base 20, the claw wheel 23, the brake bush 30, and the brake 40 are pressed against each other by the elasticity of the elastic element 43, and Since the detent wheel 23 cannot be rotated in the reverse direction by the detent 24, the transmission wheel 11 cannot be rotated in the direction in which the article is suspended.

  In addition, when it is desired to suspend an article without being overloaded, the driving wheel 50, the second retaining disk 32 of the brake bush 30, and the third retaining disk 42 of the brake 40 are pressed against each other. Then, they are united, and these are driven by the power source to rotate in the reverse direction. At this time, the brake bush 30 reverses and moves to the front end along the screw shaft portion 12, and as shown in FIG. The stop disk 32 and the claw wheel 23 can be rotated separately. Further, since the claw wheel base 20 is also detached from the claw wheel 23 and the claw wheel 23 cannot be rotated by the detent 24, the transmission wheel 11 is rotated in the direction to suspend the item by driving the transmission shaft 10 to suspend the item. At this time, the article descends at a stable speed due to frictional resistance.

  If the acceleration due to the gravity of the article exceeds the acceleration of the driving wheel 50 when the article is suspended, the transmission shaft 10 is rapidly rotated as shown in FIG. The brake bush 30 reverses and moves to the rear end along the screw shaft portion 12, and at this moment, the second retaining disk 32 of the brake bush 30 is pressed against the claw wheel 23, and the transmission shaft 10 becomes non-rotatable.

  The present invention can be applied to hoisting machines such as cranes and elevators.

10: Transmission shaft, 11: Transmission wheel, 12: Screw shaft portion, 13: Pivoting portion, 20: Claw wheel base, 21: First shaft, 22: First retaining disc, 23: Claw wheel, 24: Detent 25: Brake facing, 30: Brake bush, 31: Second shaft, 32: Second retaining disk, 33: Guide inclined groove, 40: Brake, 41: Third shaft, 42: Third retaining disk, 43 : Elastic element, 50: driving wheel, 51: ball groove, 52: ball, 53: brake facing, 241: spring, 331: guide inclined part, 332: stop end, 431: receiving bar, 432: stop bar bush, 433 : Bearing, 434: bush, 435: adjustment nut, 436: fixing nut, 511: storage end, 512: holding end.

Claims (1)

In an overload brake application device for a hoisting machine including a transmission shaft, a claw carriage, a brake bush, a brake, and a drive wheel,
The transmission shaft is pivotally mounted horizontally, and a transmission foil for outputting power is fixed to the front end thereof, and a spiral is provided on the peripheral surface of the middle stage to form a screw shaft portion, and the end thereof The outer surface is provided with an external screw to become a pivot part,
The claw carriage is connected to the transmission shaft coaxially and includes a first shaft protruding in the axial direction and a first retaining disk, and a set of the circumferential surface of the first shaft The pawl wheel and the detent are pivotally attached, and the detent is always meshed with the pawl wheel,
The brake bush includes a second shaft that is screwed with the screw shaft portion of the transmission shaft and projects in the axial direction thereof, and a second retaining disk, and an end surface of the second retaining disk At least one guide inclined groove is recessed, the front end of the guide inclined groove is formed in a guide inclined portion, the rear end of the guide inclined groove is formed as a stop end,
The brake is pivotally attached to the second shaft of the brake bush, and includes a third shaft protruding in the axial direction thereof, and a third pressing disc, and the axial direction of the third pressing disc Is elastically adjustable elastic, is pivoted,
The drive wheel is pivotally attached to the third shaft and can be rotated in the forward / reverse direction by receiving power. A ball groove is recessed in the end surface according to the guide inclined groove of the second retaining disk. The ball groove has a front end formed at the storage end, and a rear end formed at the holding end shallower than the depth of the storage end, and is constituted by the guide inclined groove and the ball groove. The ball is freely movable in the space,
Overload brake device for hoisting machines.

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