KR20220128867A - Braking Device for Rotary Motion with Shock Absorption Function - Google Patents

Abstract

The present invention relates to a rotary motion brake device with a shock absorption function as a rotary motion brake device capable of stopping relative rotation between a first member and a second member provided to be relatively rotatable with respect to the first member about a first central axis. The rotary motion brake device comprises: a pressing surface provided on the first member and extending along a circumferential direction of the first central axis; a pressed surface provided on the second member, extending along a circumferential direction of the first central axis, and provided to be pressed by the pressing surface; and a transfer unit capable of reciprocally transporting the pressing surface between a lock position in which the pressing surface is in close contact with the pressed surface and a release position in which the pressing surface is separated from and released from the pressed surface. When the pressing surface is in the lock position, by the frictional force generated between the pressing surface and the pressed surface, the first member and the second member do not rotate relative to each other about the first central axis by an external force less than a predetermined threshold value, and the first member and the second member can rotate relative to each other about the first central axis by an external force equal to or greater than the threshold value. According to the present invention, even if an attachment such as a bucket hits a rock, etc. during excavator operation and an excessive external force is transmitted, there is an effect of absorbing external impact so that the main gear and parts such as a motor, etc. connected to the main gear are not damaged.

Description

Braking Device for Rotary Motion with Shock Absorption Function

The present invention relates to a rotary motion brake device, and more particularly, to a rotary motion brake device capable of absorbing an external shock so that related parts of the excavator are not damaged even when an attachment such as a bucket collides with a rock or the like and an excessive external force is transmitted will be.

In general, an excavator is a construction machine that performs excavation work such as excavating land or rock or processing digging in civil works, construction work, and construction work. It is used to move transport objects or perform various tasks such as building land, building foundation, earth and sand loading, horse tying, scrap metal loading, raw materials, digging holes, destroying buildings such as bridges and bedrock, and road and waterworks construction.

In such an excavator, various types of work can be performed while replacing various types of attachments depending on the work purpose. That is, digging work using a bucket, crushing concrete buildings and cutting reinforcing bars using a crusher, destroying rocks and concrete using a breaker, and transporting scrap metal and rocks using a grab It is possible.

In the case of a conventional general excavator, since the coupler can only be bent in the front-rear direction, in the case of working on a slope, the work efficiency is lowered due to the need to perform the work while precise control is performed, and the direction of the attachment can be completely reversed. When the attachment was separated from the arm of the excavator, it had to be mounted and used in the opposite direction, which made the operation inconvenient and required a lot of work time.

In order to solve this problem, an excavator having a rotating device for heavy equipment capable of rotating the attachment is used, but the conventional rotating device for heavy equipment is Korean Patent No. 10-1783958 (registration date September 26, 2017) ), one worm gear rotates one main gear and does not have a separate shock-reducing device. During use, the attachment attached to the end of the arm collides with a rock, etc. Alternatively, when torsion is applied, since the single worm gear has a structure that restricts the rotation of the main gear, there is a problem that serious damage or destruction of gear devices such as the worm gear and the main gear may occur.

The present invention has been devised to solve the above problem, and its purpose is to absorb an external shock so that the related parts of the excavator are not damaged even if an attachment such as a bucket collides with a rock or the like and an excessive external force is transmitted during the excavator operation is to provide an improved rotary motion brake device.

In order to achieve the above object, the rotational motion brake device according to the present invention may stop the relative rotation between the first member and the second member provided to be rotatable relative to the first member about the first central axis. A rotary motion brake device comprising: a pressing surface provided on the first member and extending along a circumferential direction of the first central axis; a pressing surface provided on the second member, extending along a circumferential direction of the first central axis, and provided to be pressed by the pressing surface; a transfer unit capable of reciprocating the pressing surface between a locking position in which the pressing surface is in close contact with the pressing surface and a release position in which the pressing surface is separated from the pressing surface and separated from the pressing surface; When the surface is in the locking position, the first member and the second member are centered on the first central axis by an external force less than a predetermined threshold value due to a friction force generated between the pressing surface and the pressed surface. It is characterized in that the first member and the second member can rotate relative to each other about the first central axis by an external force equal to or greater than the threshold value without relative rotation with each other.

Here, it is preferable that the pressing surface and the pressing surface include an inclined surface inclined at a predetermined angle with respect to the first central axis.

Here, a circular member having the first central axis as a center of a circle, a braking member provided on the first member and having the pressing surface, wherein the transfer unit is disposed between the locking position and the unlocking position Preferably, the braking member can reciprocate linearly along the first central axis.

Here, the braking member has a hollow having the first central axis as the center of the circle, and includes a protrusion protruding in one direction along the first central axis, and the pressing surface is formed around the entire inner circumferential surface of the protrusion. It is preferable to provide with the inclined surface provided across.

Here, a member having a circular hollow provided rotatably about the first central axis, the braked member having the pressurized surface on an outer circumferential surface; It is provided on the second member and includes a rotating part in the shape of a circular rod extending along the first central axis, and an inner peripheral surface of the member to be braked is preferably screwed to one end of the rotating part.

Here, a circular member having the first central axis as the center of the circle, the braking member provided on the first member and having the pressing surface; A member having a circular hollow provided rotatably about the first central axis, the braked member having the pressurized surface on an outer circumferential surface thereof; It is preferable to be able to

Here, the conveying unit may include: a conveying member capable of moving the pressing surface to the unlocking position by moving from the locking position to the unlocking position by hydraulic pressure or pneumatic pressure; and an elastic member for elastically biasing the pressing surface to the locking position.

Here, it is preferable to be provided so as to be used in a quick coupler-type rotating device for heavy equipment that can be mounted on the distal end of the arm of the excavator.

Here, the conveying unit may include: a conveying member capable of moving the pressing surface to the unlocking position by moving from the locking position to the unlocking position by hydraulic pressure or pneumatic pressure; a working fluid accommodating part in which a working fluid capable of generating hydraulic pressure or pneumatic pressure may be accommodated, and in which at least a portion of the transfer member is accommodated; It is preferable to include; a packing member disposed inside the working fluid receiving part to be reciprocally movable along the first central axis, and which is a sealing member made of an elastic material.

Here, it is preferable that the packing member is elastically biased in a direction capable of adhering to the inner circumferential surface of the working fluid accommodating part.

Here, a pair of protrusions provided in a “U” shape are formed on one end of the packing member, and the pair of protrusions are elastically biased to the outside so as to be in close contact with the inner circumferential surface of the working fluid accommodating part. do.

Here, the braking member is a cut-out portion provided in a position along the circumferential direction of the first central axis, and preferably includes a cut-out that allows the braking member to have a "C"-shaped planar shape.

According to the present invention, there is provided a rotational motion brake device capable of stopping relative rotation between a first member and a second member provided to be rotatable relative to the first member about a first central axis, wherein the first member It is provided in the pressing surface extending along the circumferential direction of the first central axis; a pressing surface provided on the second member, extending along a circumferential direction of the first central axis, and provided to be pressed by the pressing surface; a transfer unit capable of reciprocating the pressing surface between a locking position in which the pressing surface is in close contact with the pressing surface and a release position in which the pressing surface is separated from the pressing surface and separated from the pressing surface; When the surface is in the locking position, the first member and the second member are centered on the first central axis by an external force less than a predetermined threshold value due to a friction force generated between the pressing surface and the pressed surface. Because the first member and the second member can rotate relative to each other about the first central axis by an external force equal to or greater than the threshold value, an attachment such as a bucket collides with a rock or the like during excavator work, excessive Even if an external force is transmitted, there is an effect of absorbing an external shock so that the main gear and parts such as a motor connected to the main gear are not damaged.

1 is a vertical cross-sectional view of a rotary motion brake device according to an embodiment of the present invention.
FIG. 2 is an exploded cross-sectional view of the rotary motion brake device shown in FIG. 1 .
FIG. 3 is a partially enlarged view showing a transfer unit of the rotary motion brake device shown in FIG. 1 .
FIG. 4 is a view showing a state in which a braking member of the rotary motion brake device shown in FIG. 3 is in a released position;
FIG. 5 is a plan view of the rotary motion brake device shown in FIG. 1 .
6 is a cross-sectional perspective view showing the cylinder member and the braking member shown in FIG. 1 .
FIG. 7 is a view for explaining a use state of the rotary motion brake device shown in FIG. 1 .
8 is a view showing a packing member that can be used instead of the O-ring shown in FIG. 3 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a vertical cross-sectional view of a rotary motion brake device according to an embodiment of the present invention, and FIG. 2 is an exploded cross-sectional view of the rotary motion brake device shown in FIG. 1 . FIG. 3 is a partially enlarged view showing a transfer unit of the rotary motion brake device shown in FIG. 1 .

1 to 3 , the rotational motion brake device 100 according to a preferred embodiment of the present invention is provided to be relatively rotatable about the first central axis C1 with respect to the first member 10 . A rotational motion brake device capable of stopping the relative rotation between the second members (20), the first member (10), the second member (20), the transfer unit (30), and the braking member (40) ) and the braked member 50 .

The first member 10 is a disk-shaped member centered on the first central axis C1, and includes a hollow 16 having the first central axis C1 as the center of the circle.

The first member 10 includes a plurality of accommodating portions 11 , 12 , 13 , 14 , a groove portion 15 , and a bearing 17 .

As shown in FIG. 2 , the first accommodating part 11 is a circular accommodating part provided at the upper end of the hollow 16 , and is a part in which a cylinder member 31 to be described later is accommodated and mounted.

The second accommodating part 12 is a circular accommodating part provided under the first accommodating part 11 as shown in FIG. .

The third accommodating part 13 is a groove part provided under the second accommodating part 12 as shown in FIG. 2, and a plurality of them are arranged along the circumferential direction of the first central axis C1. have.

The third accommodating part 13 is a part in which an elastic member 33 to be described later is accommodated and mounted, as shown in FIG. 3 .

In the present embodiment, the third accommodating part 13 is a circular groove part having the second central axis C2 as the center of the circle.

As shown in FIG. 2 , the fourth accommodating part 14 is a circular accommodating part provided inside the third accommodating part 13 , and is a part in which a stopper 53 to be described later is accommodated and mounted.

The groove portion 15 is a circular receiving portion provided at the lower end of the first member 10, as shown in FIG. 2, in which the protrusion 24 of the second member 20 to be described later is received and mounted. part

As shown in FIG. 2 , the hollow 16 is a circular hole penetrating the center of the first member 10 , and is a portion into which the rotating part 21 of the second member 20 to be described later is inserted.

The bearing 17 is provided in the groove portion 15 as a bearing for facilitating relative rotation between the first member 10 and the second member 20 .

In this embodiment, the bearing 17 includes a ball bearing provided on one side wall of the groove portion 15 .

As shown in FIG. 2 , the second member 20 is a circular member centered on the first central axis C1 and is disposed below the first member 10 .

The second member 20 has a hollow 23 in the center as shown in FIG. 2 , and is capable of relative rotation about the first central axis C1 with respect to the first member 10 . will be prepared

The second member 20 includes a rotating part 21 , a male threaded part 22 , a protruding part 24 , and a male threaded part 25 .

As shown in FIG. 2 , the rotating part 21 is a circular bar-shaped part protruding upward from the central part of the first member 10 .

The rotating part 21 is inserted into the hollow H of the braked member 50 as shown in FIG. 1 .

As shown in FIG. 2 , the male threaded part 22 is a male threaded part provided at the upper end of the rotating part 21 , and a female threaded part 52 formed on the inner peripheral surface of the hollow (H) of the braked member 50 and part to be screwed on.

The protrusion 24 is an annular portion formed along the edge of the second member 20 and vertically protrudes upward along the first central axis C1.

An inner surface of the protrusion 24 is coupled to the bearing 17 to allow rolling motion, and a main gear 241 is formed on an outer surface of the protrusion 24 .

The main gear 241 is a power transmission gear for rotating the second member 20 with a rotational force such as a motor (not shown) provided outside.

As shown in FIG. 2, the male screw part 25 is a male screw part provided at the lower end of the rotating part 21, and as shown in FIG. It is a part that can be screwed with the coupler (2), etc.

The transfer unit 30 has a locked position in which the pressing surface 41 to be described later is in close contact with the pressing surface 51 to be described later, and the pressing surface 41 is separated from the pressing surface 51 to be separated Between the release positions, it is a device capable of reciprocating linear transfer of the pressing surface 41 . The transfer unit 30 includes a cylinder member 31 , a transfer member 32 , and an elastic member 33 .

As shown in FIG. 2 , the cylinder member 31 is a circular member centered on the first central axis C1 and has a hollow H therein.

A working fluid accommodating part 311 in which a working fluid capable of generating hydraulic or pneumatic pressure can be accommodated is formed at the lower end of the cylinder member 31 .

In the present embodiment, the working fluid for generating hydraulic pressure is accommodated in the working fluid accommodating part 311 to be watertight.

The working fluid accommodating part 311 is a circular annular space part, and as shown in FIG. 3 , a plurality of grooves in which the O-ring 314 can be mounted are formed on the inner circumferential surface.

The O-ring 314 is an annular elastic member that seals the working fluid capable of generating hydraulic or pneumatic pressure from leaking to the outside.

On the inner circumferential surface of the hollow H of the cylinder member 31, a pressing surface 312 that can be pressed by a pressing surface 41a to be described later is formed.

The pressurized surface 312 is provided over the entire circumference of the inner peripheral surface of the hollow H of the cylinder member 31 .

At the upper end of the cylinder member 31, a working fluid inlet 313 through which a working fluid capable of generating hydraulic pressure or pneumatic pressure can enter and exit is formed.

The working fluid outlet 313 communicates with the working fluid receiving part 311 .

As shown in FIG. 2 , the transfer member 32 is a circular member centered on the first central axis C1 and has a hollow H therein.

The upper end of the transfer member 32 is inserted into the working fluid accommodating portion 311 of the cylinder member 31 so as to be reciprocally linearly movable along the first central axis C1.

The elastic member 33 is an elastic member for elastically biasing the braking member 40 to the locked position as shown in FIG. 3 , and includes a coil spring in this embodiment.

As shown in FIG. 2, the braking member 40 is a circular member centered on the first central axis C1, has a hollow H therein, and includes the pressing surface 41, have.

The braking member 40 includes a protrusion 42 protruding upward along the first central axis C1 .

In this embodiment, the pressing surface 41 is provided over the entire inner peripheral surface of the protrusion 42 .

The pressing surface 41 includes an inclined surface inclined at a predetermined angle with respect to the first central axis C1, and as shown in FIG. 3 , approximately to the right with respect to the first central axis C1. It is preferable to incline about 5 degrees to 20 degrees.

In this embodiment, the pressing surface 41 is inclined 10 degrees to the right with respect to the first central axis C1 as shown in FIG. 3 .

As a result, in this embodiment, the pressing surface 41 is provided in the form of a tapered inclined surface whose diameter gradually increases from the bottom to the top of the hollow H of the braking member 40 as shown in FIG. 2 . .

A pressing surface 41a provided in a shape symmetrical to the pressing surface 41 is provided on the outer peripheral surface of the protrusion 42 .

In this embodiment, as shown in FIG. 2 , the pressing surface 41a is provided in the form of a tapered inclined surface whose diameter gradually decreases from the bottom to the top of the hollow H of the braking member 40 .

Accordingly, by the pressing surfaces 41 and 41a, as shown in FIG. 3 , the protrusion 42 is provided to have a tapered cross-section whose width becomes narrower toward the upper side.

The protrusion 42 is inserted between the pressurized surface 51 and the pressurized surface 312 as shown in FIG. 3 .

The lower surface 43 of the braking member 40 is in contact with the upper end of the elastic member 33 , and receives an elastic force acting upward by the elastic member 33 .

The upper surface 44 of the braking member 40 is provided to be in contact with the lower surface of the transfer member 32 , and when the transfer member 32 descends, a pressing force applied downward by the transfer member 32 . will receive

As a result, when the working fluid is injected into the working fluid accommodating part 311 of the cylinder member 31 , the conveying member 32 descends along the first central axis C1 , and the conveying member 32 . The braking member 40 descends along the first central axis C1 due to the lowering of the .

Accordingly, in a state in which the working fluid is not injected into the working fluid receiving part 311 of the cylinder member 31 , the pressing surface of the braking member 40 is performed by the elastic member 33 as shown in FIG. 3 . The locked position in which the (41) is in close contact with the pressurized surface (51) of the braking member (50) is maintained.

Here, when the pressing surface 41 is in the locking position, by the friction force generated between the pressing surface 41 and the pressing surface 51, the first The member 10 and the second member 20 do not rotate relative to each other about the first central axis C1. However, when an external force greater than or equal to a threshold value capable of overcoming the frictional force is applied, the first member 10 and the second member 20 may rotate relative to each other about the first central axis C1. .

As a result, when the friction force generated between the pressing surface 41 and the pressurized surface 51 is appropriately adjusted in the manufacturing process of the rotational motion brake device 100 , when an external force equal to or greater than a specific threshold is applied It is possible to secure the function to absorb the shock caused by the external force.

For example, the magnitude of the friction force generated between the pressing surface 41 and the pressing surface 51 may include an area of the pressing surface 41, a surface roughness, an inclination angle with respect to the first central axis C1, It may be determined by the elastic force of the elastic member 33 .

On the other hand, when the working fluid is injected into the working fluid receiving part 311 of the cylinder member 31, the braking member 40 descends along the first central axis C1, as shown in FIG. The release position where the pressing surface 41 of the braking member 40 is separated from the pressing surface 51 of the braking member 50 is maintained. At this time, a predetermined interval G is generated between the pressing surface 41 and the pressing surface 51 and between the pressing surface 41a and the pressing surface 312 , respectively.

Here, when the pressing surface 41 is in the release position, the first member 10 and the second member 20 are free to rotate relative to each other about the first central axis C1. do.

In this embodiment, the braking member 40 has a cutout ( 45) is included.

The cutout 45 is a cutout provided in a portion of the braking member 40 , and allows the braking member 40 to have a “C”-shaped planar shape.

Accordingly, when the pressing surface 41 of the braking member 40 moves to a locked position in which the pressing surface 41 of the braking member 50 is in close contact with the pressing surface 51 of the braking member 40 , the braking member 40 is elastically deformed. The width of the cutout 45 may be slightly increased or decreased, and the entire area in the circumferential direction of the pressing surface 41 is completely in close contact with the pressed surface 51 by the width fluctuation of the cutout 45 . can

The braked member 50 is a member having a circular hollow H rotatably provided about the first central axis C1, and is positioned above the stopper 53 as shown in FIG. 3 . is placed on

The pressurized surface 51 is provided over the entire periphery of the outer peripheral surface of the braked member 50 .

The pressurized surface 51 extends 360 degrees along the circumferential direction of the first central axis C1 and is provided to be pressurized by the pressurized surface 41 .

The pressurized surface 51 includes an inclined surface inclined at a predetermined angle with respect to the first central axis C1, and as shown in FIG. 3, to the right with respect to the first central axis C1. It is preferable to incline about 5 degrees to 20 degrees.

In this embodiment, the pressurized surface 51 is inclined 10 degrees to the right with respect to the first central axis C1.

A female screw part 52 capable of being screwed to the male screw part 22 at the upper end of the rotating part 21 is formed on the inner circumferential surface of the braked member 50 .

As shown in FIG. 3 , the stopper 53 is a member having a circular hollow H centered on the first central axis C1, and prevents the braked member 50 from moving downward. It is the absence of restraint.

In the present embodiment, the stopper 53 includes a sliding bearing supporting and supporting the lower surface of the member 50 to be braked.

As shown in FIG. 3 , a first fixing member 54 is screwed to an upper surface of the braked member 50 , and a second fixing member 55 is screwed to an upper surface of the rotating part 21 . .

As shown in FIG. 5 , the first fixing member 54 is a flat plate member having a circular hollow H centered on the first central axis C1 .

As shown in FIG. 5 , the second fixing member 55 is a flat plate member having a circular hollow H centered on the first central axis C1 .

In this embodiment, after the first fixing member 54 is screwed to the braked member 50 and the second fixing member 55 is screwed to the rotating part 21, the second fixing member ( 55) and the inner peripheral surface of the first fixing member 54 are coupled to each other by welding.

Meanwhile, in the rotational motion brake device 100 , as shown in FIG. 1 , in a state in which the first member 10 and the second member 20 are coupled to each other, the braking member 40 and the braked The member 50 is configured to be received in a watertight manner.

Accordingly, a lubricant for lubricating the operation of the transfer unit 30 , the brake member 40 , and the brake target member 50 is accommodated in a watertight state in the inner space of the rotary motion brake device 100 .

Meanwhile, in the present embodiment, a plurality of grooves in which the O-ring 314 can be mounted are formed on the inner circumferential surface of the working fluid receiving part 311 of the cylinder member 31 as shown in FIG. 3 , but the O-ring Of course, instead of using 314, a packing member 314a having a “U”-shaped cross-section as shown in FIG. 8 may be used.

The packing member 314a is a sealing member made of an elastic material such as rubber, and is provided in a circular ring shape to be accommodated in the working fluid receiving part 311 as shown in FIG. 8 .

The packing member 314a is disposed inside the working fluid accommodating part 311 and is reciprocally linearly movable along the first central axis C1 like the transfer member 32 .

The width of the packing member 314a is preferably equal to or slightly smaller than the width D of the working fluid accommodating part 311 as shown in FIG. 8 .

The upper end of the packing member 314a is concavely recessed in a “U” shape, and the “U”-shaped protrusion 315 on the upper end of the packing member 314a is formed of the working fluid receiving part 311 . It is elastically biased outward so that it can adhere to the inner circumferential surface.

When the packing member 314a is used in this way, there is an advantage in that it is not necessary to process a plurality of grooves in which the O-ring 314 can be mounted.

In fact, when the width D of the working fluid accommodating part 311 is relatively small, it is almost impossible to process the groove in which the O-ring 314 can be mounted. Therefore, when the packing member 314a is used, the machining process of the rotary motion brake device 100 is simplified, and the overall manufacturing cost and machining time are also reduced.

Hereinafter, an example of a method of using the rotary motion brake device 100 having the above-described configuration will be described. Here, it is assumed that the rotary motion brake device 100 is used in a quick coupler-type rotary device that can be mounted on the distal end of the arm of the excavator as shown in FIG. 7 .

The quick coupler-type rotary device includes an upper body 1 having a lower end coupled to the first member 10 and an upper end coupled to a distal end of an excavator arm, and an upper end being the second member, as shown in FIG. 7 . It is coupled with the male screw part 25 of (20) and has a lower body 2 to which various attachments such as buckets can be attached to the lower end, and hydraulic pressure that can be used for the operation of various attachments mounted on the excavator. , a hydraulic pressure transmission device 3 for transmitting from the upper side of the upper body 1 to the lower side of the lower body 2 .

First, as shown in FIG. 4 , when the pressing surface 41 is in the release position, the second member 20 is moved with respect to the first member 10 about the first central axis C1. become rotatable. Accordingly, the lower body 2 is relatively rotatable about the first central axis C1 with respect to the upper body 1 .

In this way, in a state in which the second member 20 is relatively rotatable with respect to the first member 10 , when the hydraulic pressure lowering the conveying member 32 is removed, the conveying is performed by the elastic force of the elastic member 33 . As the member 32 rises to the locked position, the pressing surface 41 also rises to be in the locked position in close contact with the pressing surface 51 with a predetermined pressing force. At this time, the pressing surface 41a is also firmly in close contact with the pressing surface 312 of the cylinder member 31 .

Here, a small amount of lubricating oil may exist between the pressing surface 41 and the pressurized surface 51 to affect the frictional force, but in the locked position, the pressing surface 41 and the pressurized surface 51 are mutually Since they are in close contact with a considerable amount of pressure, little lubricating oil exists between the pressing surface 41 and the pressing surface 51 in the locked position.

When the pressing surface 41 is in the locked position, when an attachment such as a bucket collides with a rock during excavator operation, an external force is applied to the attachment, and the external force is applied to the lower body 2 ) and the braking target member 50 to the point where the pressed surface 51 and the pressing surface 41 meet.

At this time, when the torsional external force transmitted to the pressing surface 41 is an external force less than a predetermined threshold value that does not overcome the frictional force generated between the pressing surface 41 and the pressurized surface 51 , the pressing Due to the frictional force generated between the surface 41 and the pressurized surface 51, even if an external force is applied, the upper body 1 and the lower body 2 are connected to each other about the first central axis C1. No relative rotation. That is, a normal excavator operation may proceed.

However, when the torsional external force transmitted to the pressing surface 41 is abnormally excessive, and the torsional external force overcomes the frictional force generated between the pressing surface 41 and the pressing surface 51, the pressing surface ( 41) and the pressurized surface 51, a sliding motion occurs, causing relative rotation with respect to the lower body 2 and the upper body 1 about the first central axis C1. As a result, when a strong external force greater than or equal to a specific threshold is applied, the rotational motion brake device 100 can absorb an impact caused by the external force.

The rotational motion brake device 100 having the above configuration includes a first member 10 and a second member ( 20) A rotational motion brake device capable of stopping the relative rotation between, the pressing surface 41 provided on the first member 10 and extending along the circumferential direction of the first central axis C1; a pressing surface 51 provided on the second member 20, extending along the circumferential direction of the first central axis C1, and provided to be pressed by the pressing surface 41; The pressing surface 41 is located between a locking position in which the pressing surface 41 is in close contact with the pressing surface 51 and a release position in which the pressing surface 41 is separated from and separated from the pressing surface 51 . and a transfer unit 30 capable of reciprocating the By this, the first member 10 and the second member 20 do not rotate relative to each other about the first central axis C1 by an external force less than a predetermined threshold value, and are subjected to an external force greater than the threshold value. By this, since the first member 10 and the second member 20 can rotate relative to each other about the first central axis C1, an attachment such as a bucket collides with a rock or the like during the excavator operation, excessive Even if an external force is transmitted, there is an advantage in that the main gear 241 and parts such as a motor connected to the main gear 241 can be absorbed so as not to be damaged.

And since the rotational motion brake device 100 includes an inclined surface in which the pressing surface 41 and the pressing surface 51 are inclined at a predetermined angle with respect to the first central axis C1, the pressing surface 41 and the pressing surface 51 include an inclined surface. By vertically reciprocating the surface 41 along the first central axis C1 , the horizontal reciprocating movement of the pressing surface 41 is simultaneously induced, so that the pressing surface 41 and the pressing surface 51 can be easily moved. It has the advantage of strong adhesion. In addition, the pressing surface 41 and the pressing surface 51 can be easily arranged in the vicinity of the first central axis C1 corresponding to the rotation axis, and also the rotating part 21 of the second member 20 . ), there is also an advantage that the pressing surface 41 and the pressing surface 51 can be arranged on the outer peripheral surface.

In addition, the rotary motion brake device 100 is a circular member having the first central axis C1 as the center of the circle, is provided on the first member 10 , and includes the pressing surface 41 . member 40; and the transfer unit 30 can reciprocate linearly move the braking member 40 along the first central axis C1 between the locking position and the unlocking position, There is an advantage that the position movement of the pressing surface 41 made in a circular ring shape can be easily implemented.

And in the rotary motion brake device 100, the braking member 40 is provided with a hollow (H) having the first central axis (C1) as a center of a circle, and the first central axis (C1) It includes a protrusion 42 protruding in one direction along the line, and the pressing surface 41 is provided as an inclined surface provided over the entire periphery of the inner circumferential surface of the protrusion 42, so that the pressing surface 41 and the pressurized surface are provided. In a state in which the 51 is in close contact with each other, a strong frictional force can be exerted, and in a state in which the pressing surface 41 and the pressing surface 51 are separated from each other, there is an advantage that the relative rotation is easy.

In addition, the rotary motion brake device 100 is a member having a circular hollow (H) rotatably provided about the first central axis (C1), the outer peripheral surface is provided with the pressurized surface (51) a braked member 50; It is provided on the second member 20, and includes a rotating part 21 having a circular rod shape extending along the first central axis C1, and an inner circumferential surface of the member 50 to be braked is the rotating part. Since it is screwed to the one end of 21 , there is an advantage that the braked member 50 can be formed as a nut-shaped member that couples the second member 20 and the first member 10 .

In addition, the rotary motion brake device 100 is a circular member having the first central axis C1 as the center of the circle, is provided on the first member 10 , and includes the pressing surface 41 . member 40; A member having a circular hollow (H) rotatably provided about the first central axis (C1), the braked member (50) having the pressurized surface (51) on the outer peripheral surface; Since the braking member 40 and the braked member 50 can be accommodated in a watertight manner, the lubricating oil for lubricating the operation of the transfer unit 30 and the braking member 40 and the braked member 50 is watertight. It has the advantage of being accepted as it is. That is, the rotary motion brake device 100 has an advantage in that it can exert a considerable amount of frictional force even in a state in which the lubricant is accommodated.

In addition, the rotary motion brake device 100 can move the pressing surface 41 to the unlocking position by moving the transfer unit 30 from the locking position to the unlocking position by hydraulic pressure or pneumatic pressure. a conveying member 32; Since the elastic member 33 for elastically biasing the pressing surface 41 to the locking position is included, the locking position can be continuously maintained by the elastic member 33 without additional power. In actual excavator operation, since the working time of the pressing surface 41 in the locking position is relatively longer than in the unlocking position, it is preferable to use the elastic member 33 to maintain the locking position.

And the rotary motion brake device 100 is provided to be used in a quick coupler-type rotary device that can be mounted on the distal end of the arm of the excavator, so that it is an attachment such as a bucket during excavator work. There is an advantage in that the gear of the quick coupler type rotation device is not damaged even when the slab collides with a rock or the like.

In addition, the rotary motion brake device 100 is configured to move the pressing surface 41 to the release position by moving the transfer unit 30 from the locking position to the unlocking position by hydraulic pressure or pneumatic pressure. capable transfer member 32; A working fluid capable of generating hydraulic pressure or pneumatic pressure may be accommodated therein, and a working fluid receiving portion 311 in which at least a portion of the transfer member 32 is accommodated; It is disposed inside the working fluid receiving part 311 so as to be reciprocally movable along the first central axis C1, and a packing member 314a which is a sealing member made of an elastic material. Unlike the O-ring 314 mounted on the inner circumferential surface of the working fluid accommodating part 311 , the machining process of the working fluid accommodating part 311 is simplified and the overall manufacturing cost and processing time are reduced.

In addition, in the rotational motion brake device 100 , the packing member 314a is elastically biased in a direction to be in close contact with the inner circumferential surface of the working fluid accommodating part 311 , so that the working fluid accommodating part 311 is There is an advantage in that the working fluid accommodated therein can maintain the watertight force for a long time without leakage.

In addition, in the rotary motion brake device 100, a pair of protrusions 315 provided in a “U” shape are formed at one end of the packing member 314a, and the pair of protrusions 315 are Since it is elastically biased outward so as to be in close contact with the inner circumferential surface of the working fluid accommodating part 311 , the elastic force of the side portion of the packing member 314a in close contact with the inner circumferential surface of the working fluid accommodating part 311 is relatively small. Then, the protrusion 315 is formed only on the upper end and/or lower end of the packing member 314a to improve the watertight force of the upper end and/or the lower end of the packing member 314a, so that the packing member 314a ) has the advantage of facilitating sliding movement in the interior of the working fluid receiving part 311 and improving the sealing ability at the same time.

And as shown in FIG. 6 , the rotary motion brake device 100 is a cutout provided in a portion of the position along the circumferential direction of the first central axis C1, and the braking member 40 is “C "Since the cutout 45 is provided to have a flat shape, the locking position in which the pressing surface 41 of the braking member 40 is in close contact with the pressing surface 51 of the braking member 50 is provided. , the width of the cut-out 45 may slightly increase or decrease due to the elastic deformation of the braking member 40, and the width of the cut-out 45 may change the width of the pressing surface 41. There is an advantage that the entire area in the circumferential direction can be completely in close contact with the pressurized surface 51 .

In the present embodiment, the transfer member 32 presses the braking member 40 , but it goes without saying that the transfer member 32 and the braking member 40 may be integrally formed.

In the present embodiment, the transfer unit 30 is coupled to the first member 10 , but, conversely, the transfer unit 30 may be coupled to the second member 20 as a matter of course.

In this embodiment, the elastic member 33 elastically biases the pressing surface 41 to the locking position and the transfer unit 30 transfers the pressing surface 41 to the unlocking position, but instead Of course, the elastic member 33 may elastically bias the pressing surface 41 to the release position, and the transfer unit 30 may transfer the pressing surface 41 to the locking position.

In this embodiment, the rotary motion brake device 100 is described as being used in a quick coupler type rotary device that can be mounted on the distal end of the arm of the excavator as shown in FIG. Of course, it can be used in various devices and various positions, such as the middle part of the arm of the excavator.

Although the present invention has been described above, the technical scope of the present invention is not limited to the contents described in the above-described embodiments, and an equivalent configuration modified or changed by a person skilled in the art is not limited to the technical scope of the present invention. It is clear that it does not go beyond the scope of the idea.

＊ Explanation of the symbols for the main parts of the drawing ＊
100: rotational motion brake device
1: Upper body
2: lower body
3: hydraulic transmission
10: first member
11: first receiving unit
12: second receiving unit
13: third receiving unit
14: fourth receiving unit
15: home
16: hollow
17: bearing
20: second member
21: rotating part
22: male thread part
24: protrusion
23: hollow
25: male thread part
30: transfer unit
31: cylinder member
32: transfer member
33: elastic member
40: no braking
41: pressure side
41a: pressure surface
42: protrusion
43: If
44: upper surface
45: cutout
50: non-brake member
51: surface to be pressed
52: female thread part
53: stopper
54: first fixing member
55: second fixing member
241: main word
311: working fluid receiving part
312: surface to be pressed
313: working fluid inlet
314: O-ring
314a: packing member
315: turn
C1: first central axis
C2: second central axis
G: thickness

Claims (12)

A rotational motion brake device capable of stopping relative rotation between a first member and a second member provided to be rotatable relative to the first member about a first central axis,
a pressing surface provided on the first member and extending along a circumferential direction of the first central axis;
a pressing surface provided on the second member, extending along a circumferential direction of the first central axis, and provided to be pressed by the pressing surface;
a transfer unit capable of reciprocally transporting the pressing surface between a locking position in which the pressing surface is in close contact with the pressing surface and a release position in which the pressing surface is separated from and separated from the pressing surface;
When the pressing surface is in the locking position, the first member and the second member are moved to the first center by an external force less than a predetermined threshold due to a friction force generated between the pressing surface and the pressed surface. The rotational motion brake device, characterized in that the first member and the second member can rotate relative to each other about the first central axis by an external force equal to or greater than the threshold value without relative rotation about an axis. The method of claim 1,
The pressing surface and the pressing surface include an inclined surface inclined at a predetermined angle with respect to the first central axis. The method of claim 1,
A circular member having the first central axis as a center of a circle, provided on the first member, and a braking member having the pressing surface;
and the transfer unit is capable of reciprocating and linear movement of the braking member along the first central axis between the locking position and the unlocking position. 4. The method of claim 3,
The braking member is
and a hollow having the first central axis as the center of a circle, and comprising a protrusion protruding in one direction along the first central axis,
The pressing surface is provided as an inclined surface provided over the entire inner peripheral surface of the protrusion. The method of claim 1,
a member having a circular hollow rotatably about the first central axis, the braked member having the pressurized surface on an outer circumferential surface;
It includes a; is provided on the second member, a circular rod-shaped rotating portion extending along the first central axis;
The rotational motion brake device, characterized in that the inner peripheral surface of the braked member is screwed to one end of the rotating part. The method of claim 1,
a circular member having the first central axis as a center of a circle, a braking member provided on the first member and having the pressing surface;
A member having a circular hollow provided rotatably about the first central axis, the braked member having the pressurized surface on an outer circumferential surface;
The rotational motion brake device, characterized in that the braking member and the braking member can be accommodated in a watertight manner. The method of claim 1,
The transfer unit is
a transfer member capable of moving the pressing surface to the unlocking position by moving from the locking position to the unlocking position by hydraulic pressure or pneumatic pressure;
and an elastic member for elastically biasing the pressing surface to the locking position. The method of claim 1,
A rotary motion brake device, characterized in that it is provided to be used in a quick coupler-type rotary device for heavy equipment that can be mounted on the distal end of an excavator arm. The method of claim 1,
The transfer unit is
a transfer member capable of moving the pressing surface to the unlocking position by moving from the locking position to the unlocking position by hydraulic pressure or pneumatic pressure;
a working fluid accommodating part in which a working fluid capable of generating hydraulic pressure or pneumatic pressure may be accommodated, and in which at least a portion of the transfer member is accommodated;
and a packing member which is disposed inside the working fluid accommodating part to reciprocate along the first central axis and is a sealing member made of an elastic material. 10. The method of claim 9,
The packing member is elastically biased in a direction to be in close contact with the inner circumferential surface of the working fluid accommodating part. 11. The method of claim 10,
A pair of protrusions provided in a “U” shape are formed on one end of the packing member, and the pair of protrusions are elastically biased outward to be in close contact with the inner circumferential surface of the working fluid accommodating part. rotary motion brake device. 5. The method of claim 4,
The braking member is
and a cutout provided at a portion in a position along the circumferential direction of the first central axis, the cutout allowing the braking member to have a "C"-shaped planar shape.

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