KR20170077526A

KR20170077526A - Gap Preventing Apparatus for Working Machine

Info

Publication number: KR20170077526A
Application number: KR1020150187483A
Authority: KR
Inventors: 김경환; 전홍규; 유재형; 이재옥; 김태윤
Original assignee: 현대중공업 주식회사
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2017-07-06

Abstract

The present invention relates to an apparatus for preventing connection of a working machine, and more particularly, A lower plate accommodated in the space portion of the cover; A guide structure resting on an upper portion of the lower plate; An elastic member which is press-fitted between the cover and the guide structure and closely contacts the lower plate and the guide structure; And a play compensating member which is press-fitted to the side surface of the guide structure and moves between the lower plate and the guide structure to lift the guide structure when the adhesion between the lower plate and the guide structure is weakened.

Description

{Gap Preventing Apparatus for Working Machine}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing connection of a working machine.

A variety of working machines are used at work sites such as construction sites or civil engineering sites. Work machines will have appropriate mechanical structure and performance for each type of work such as roads, rivers, harbors, railways, and plants. That is, due to the diversity of work performed in the industrial field, the working machine can be classified into excavation equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, foundation equipment and the like. Specifically, excavator, wheel loader, forklift, It is a concept that includes a considerable variety of equipment such as trucks, rollers, cranes, and the like.

The most basic work performed at the construction site is digging. In the case of industrial construction, excavation is mostly used as a working machine, in which excavation of a certain depth of the ground is carried out to install various structures or to lay pipes on the ground.

For example, in the case of an excavator, the connecting part between the bucket, the arm, and the boom is assembled by connecting parts such as pins and bushings, and the upper and lower structures perform joint movements The upper and lower structures are in contact with each other while the joints move, and a play caused by friction and abrasion is generated. To prevent this, an anti-play device capable of replacing the structure and the related parts without detaching the structure is used.

However, the existing anti-play device minimizes the clearance by simply applying a shim between the parts. Such a shim has a tendency to occur and expand due to wear and deformation when the machine is repeatedly used. In addition, there is a problem that all the peripheral parts must be removed at the time of replacement, so that a lot of manpower and time are required to replace the connection portion anti-skid device, and there is a problem that a safety accident of the worker may occur at the time of detachment.

Korean Patent Laid-Open No. 10-2007-0111826 (Published on November 22, 2007)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to provide a method and apparatus for preventing a gap occurrence and a quality problem due to repeated operation And to provide an apparatus for preventing a connection portion of a working machine.

It is also an object of the present invention to provide an apparatus for preventing connection of a working machine, which can automatically fill an extended play portion even if wear is continually worn between parts to enlarge the play.

According to an aspect of the present invention, there is provided an apparatus for preventing connection of a working machine, the apparatus comprising: a cover mounted on a connecting part assembled to a connecting portion of a working machine; A lower plate accommodated in the space portion of the cover; A guide structure resting on an upper portion of the lower plate; An elastic member which is press-fitted between the cover and the guide structure and closely contacts the lower plate and the guide structure; And a play compensating member which is press-fitted to the side surface of the guide structure and moves between the lower plate and the guide structure to lift the guide structure when the adhesion between the lower plate and the guide structure is weakened.

Specifically, the cover includes a cover plate having a circular shape and having an insertion hole into which the connecting part is inserted at a central portion thereof; An outer frame formed along an outer peripheral surface of the cover plate; And an inner rim formed along the inner circumferential surface of the cover plate.

Specifically, the bottom plate has an outer circumferential surface in close contact with an inner circumferential surface of the outer rim, an inner circumferential surface thereof is in close contact with an outer circumferential surface of the inner rim, and a pressing force between the elastic member and the clearance compensating member causes a gap between the outer rim and the inner rim It can slide.

Specifically, the outer rim has a groove portion formed in a part of an inner circumferential surface thereof, the groove portion having a first horizontal groove formed on the inner peripheral surface of the outer rim, A first vertical groove continuously extending from the one end of the first horizontal groove to a direct downward direction; A second horizontal groove continuously extending horizontally at a lower end of the first vertical groove; And a second vertical groove continuously extending from the one end of the second horizontal groove to the outside.

Specifically, the bottom plate has a protrusion formed on a part of an outer circumferential surface corresponding to the groove, and the protrusion is located in the first horizontal groove, the first vertical groove, the second horizontal groove, and the second vertical groove, , A stabilization function, a safety function, and an assembling / disassembling function of the robot.

Specifically, the guide structure may have a positive inclination such that the inner circumferential surface is in contact with the outer circumferential surface of the inner rim, and the diameter decreases as the outer circumferential surface is downward.

Specifically, the guide structure may have a rounded corner portion where the outer circumferential surface and the lower surface meet.

Specifically, the elastic member may be configured such that one side of the elastic member is compressively mounted on the lower surface of the cover plate, and the other side thereof is compressively mounted on the upper surface of the guide structure.

Specifically, the elastic member may be a dish spring or a coil spring.

Specifically, the clearance compensating member may be composed of a plurality of snap rings.

According to the present invention, there is provided an apparatus for preventing a connection portion of a work machine, which is configured such that repeated parts of the work machine continue to be worn by repeated relative movements to automatically fill an extended play portion even if the play is expanded, It is possible to prevent the quality problems, and it is possible to reduce the number of maintenance and replacement work operations by eliminating the replacement work until the clearance is extended beyond the predetermined interval, and the clearance portion is filled every time the clearance is generated It is possible to prevent the operation noise (such as contact impact sound) and performance deterioration due to the clearance, and to improve the product reliability and customer satisfaction, thereby securing the product competitiveness.

1 is an external perspective view of an apparatus for preventing connection of a work machine according to an embodiment of the present invention.
2 is a sectional view taken along the line A-A 'in Fig. 1 at the time of initial assembly.
3 is a cross-sectional view taken along line A-A 'in FIG. 1 when a clearance is generated.
4 is a perspective view of a cover according to the present invention.
5 is a perspective view of a bottom plate according to the present invention.
6 is a view for explaining a groove portion and a protruding portion according to the present invention.
7 is a side view of a work machine to which the anti-play apparatus according to an embodiment of the present invention is applied.
8 is a perspective view showing a case where the anti-play apparatus according to an embodiment of the present invention is applied to a connection portion between an arm and a bucket.
9 is a cross-sectional view showing a case where the anti-play apparatus according to an embodiment of the present invention is applied to a connection portion between an arm and a bucket.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

2 is a cross-sectional view taken along line A-A 'in FIG. 1 during the initial assembly, and FIG. 3 is a cross-sectional view taken along line A-A' FIG. 4 is a perspective view of a cover according to the present invention, FIG. 5 is a perspective view of a bottom plate according to the present invention, FIG. 6 is a cross- FIG. 7 is a side view of a work machine to which the anti-play apparatus according to an embodiment of the present invention is applied, and FIG. 8 is a side view of the work machine according to an embodiment of the present invention, FIG. 9 is a cross-sectional view showing a case where the anti-skid device according to an embodiment of the present invention is applied to a connection portion between an arm and a bucket.

Before describing an apparatus 100 for preventing connection of a working machine according to an embodiment of the present invention, a work machine 1 to which an anti-play apparatus 100 is applied will be described with reference to FIGS. 7 to 9, Will be described first.

7 to 9, the working machine 1 may be configured to include a working device 10, a turning body 20, and a traveling body 30. As shown in Fig.

Such a working machine (1) can be a crawler-type excavator that performs work such as excavation work for digging the ground at the construction site, loading work for transporting the soil, crushing work for dismantling the building, and stop work for arranging the ground have. Of course, the working machine 1 may not be an excavator but may be various equipment to which the anti-restraint device 100 is applied. Hereinafter, the working machine 1 is limited to a crawler excavator. It should be understood, however, that the present invention is not limited to the embodiment but is merely an example.

The working device 10 is provided on one side of the working machine 1 and is composed of a boom 11, an arm 13 and a bucket 15. The boom 11 is connected to two boom cylinders 12 And the position of the bucket 15 can be adjusted by operating the arm 13 by the arm cylinder 14. The bucket 15 can perform detailed work by the bucket cylinder 16.

Such a working device 10 can be used in a work environment such as an articulating part such as a bucket 15 and an arm 13 in the case of an excavator or an oval in Figure 7 between the arm 13 and the boom 11, The work is done while exercising the joints at various connections marked as.

For example, as shown in FIGS. 8 and 9, a connection part 40 such as a pin 41 and a bushing 42 is assembled to a connection part between the arm 13 and the bucket 15, The arm 13 and the bucket 15 can move relative to each other as the arm 13 and the bucket 15 continue their joint motion at this time. The clearance preventing device 100 according to the present invention can be inserted into the pin 41 at the connection portion where the surface contact occurs in order to solve the problem caused by the occurrence of the clearance. And the anti-spoofing device 100 will be described later in detail.

The swivel body 20 is connected to the front portion of the working device 10 and is mounted on a traveling body 30 to be described later and can be rotated 360 degrees by a swiveling system and includes a frame 21 having a frame structure, An engine 23, and a counterweight 24, which are disposed on the vehicle body 21, as shown in Fig.

A pair of right and left paddle wheels 32 are rotatably mounted on the front side of the truck or track frame 31 and a pair of left and right drive wheels 33 are provided on the rear side of the truck or track frame 31 And an endless track 34 which is rotatably installed and which encloses the swinging wheel 32 and the drive wheel 33 can be provided.

Hereinafter, an apparatus 100 for preventing connection of a working machine according to an embodiment of the present invention will be described with reference to FIGS. 7 to 9 again with reference to FIGS. 1 to 6. FIG.

The anti-spoofing apparatus 100 includes a pin 41 and a bushing (not shown) at a connection portion between an articulating portion according to the work of the working machine 10 at a construction site, for example, 42 and the like so as to allow relative movement between the arm 13 and the bucket 15. The arm 13 and the bucket 15 as the upper and lower structures continue to move jointly, It can be applied by inserting it into the pin 41 at the connection portion where the surface contact occurs to compensate for the gap portion that is extended while contacting.

The anti-spoofing apparatus 100 may include a cover 110, a lower plate 120, a guide structure 130, an elastic member 140, and a play compensating member 150.

The cover 110 may be coupled with a lower plate 120 to be described later and may include a guide structure 130 to be described later, an elastic member 140 to be described later, and a clearance compensating member 150 A cover plate 111, an outer rim 112, and an inner rim 113. The cover plate 111 includes a cover plate 111,

The cover plate 111 may have a circular shape, and an insertion hole 111a may be formed at the center thereof. The insertion hole 111a is formed in the pin 41 of the connection part 40 to be assembled to the connection part of the working machine 1, for example, as shown in Fig. 9, so that the anti- The cover plate 111 may be formed to have a size and a shape corresponding to the outer circumferential surface of the pin 41. [

The cover plate 111 may serve to fix one side of the elastic member 140, which will be described later, when the anti-play apparatus 100 is assembled.

The outer rim 112 may be formed to have a constant height along the outer circumferential surface of the cover plate 111.

The inner circumferential surface of the outer rim 112 may be in close contact with the outer circumferential surface of the lower plate 120 to be described later and may be smoothly processed to facilitate the sliding motion of the lower plate 120.

A groove 114 having a predetermined depth may be formed in a part of the inner circumferential surface of the outer rim 112.

6, the groove portion 114 can be engaged with a protruding portion 121, which will be described later, formed on a lower plate 120, which will be described later, and can function as a posture fixing function, The first horizontal grooves 114a, the first vertical grooves 114b, the second horizontal grooves 114c and the second vertical grooves 114d may be continuous to enable safety functions and assembly / disassembly functions .

The first horizontal groove 114a may be formed on the inner circumferential surface of the outer rim 112 and may be connected to a device for assembling the anti-playout apparatus 100, for example, A protruding portion 121 to be described later is positioned on this portion until it is inserted into the pin 41 of the component 40 and a guide structure 130 to be described later that is contained in the bottom plate 120, (140), and a function of fixing the posture so that the clearance compensating member (150), which will be described later, is not released to the outside.

The first vertical grooves 114b may extend continuously from one end of the first horizontal grooves 114a to the lower side of the first horizontal grooves 114a. When the anti-restraining device 100 is mounted on the pins 41, The protrusion 121 is positioned so as to guide the protrusion 121 according to the clearance between the arm 13 and the bucket 15 so as to perform the play preventing function. Since the cover plate 111 and the lower plate 120 to be described later are fixed by the arm 13 and the bucket 15, even if the protrusion 121 is positioned in the first vertical groove 114b, the elastic member 140 , The clearance compensating member 150 to be described later is not released to the outside.

The second horizontal grooves 114c may extend continuously horizontally at the lower end of the first vertical grooves 114b and the degree of clearance may reach a limit due to repetitive joint movements of the arm 13 and the bucket 15 The protruding portion 121 is positioned at this portion so that the play preventing device 100 can no longer perform the play preventing function. That is, the second horizontal groove 114c prevents the lower plate 120, which will be described later, from being detached from the cover 110 when the anti-playout apparatus 100 is no longer performing the anti- A safety function for preventing a secondary accident, which is caused by disassembling the guide structure 130, the elastic member 140 described later, and the clearance compensating member 150 to be described later, is performed.

The second vertical groove 114d may extend continuously from the one end of the second horizontal groove 114c to the outside and may be extended to the outside when assembling the anti-play device 100 to the pin 41, The projecting portion 121 to be described later enters and exits through this portion when disassembling for replacement of the main body 100.

The inner edge 113 may be formed to have a constant height along the inner circumferential surface of the cover plate 111 having the insertion hole 111a at the center and may be formed to be equal to the height of the outer edge 112 have.

The outer circumferential surface of the inner rim 113 can be in close contact with the inner circumferential surface of the lower plate 120 and an inner circumferential surface of the guide structure 130 to be described later and can facilitate the sliding motion of the lower plate 120 and the guide structure 130 It may be desirable to process it smoothly.

The inner circumferential surface of the inner rim 113 may be in close contact with the outer circumferential surface of the fin 41 and may preferably be smoothly processed so as to minimize friction with the outer circumferential surface of the pin 41. [

The cover 110 may be formed with a space portion (not shown) by a cover plate 111, an outer rim 112 and an inner rim 113. The space portion may include a lower plate 120, A guide structure 130 to be described later, an elastic member 140 to be described later, and a clearance compensating member 150 to be described later.

The lower plate 120 may be received in the space of the cover 110 and may be formed in a ring shape so as to be closely inserted between the outer rim 112 and the inner rim 113 of the cover 110.

Specifically, the bottom plate 120 can be in close contact with the inner circumferential surface of the outer rim 112, the inner circumferential surface can be in intimate contact with the outer circumferential surface of the inner rim 113, and the outer rim 112 and the inner rim 113, It is preferable that the outer peripheral surface and the inner peripheral surface are smoothly processed. The lower plate 120 can be slid by a pressing force of an elastic member 140 or a clearance compensating member 150 to be described later.

The lower plate 120 may have a guide structure 130 and a clearance compensating member 150 to be described later. The guide structure 130 and a clearance compensating member 150, which will be described later, It can be formed in a stepped shape so as to have a certain depth from the inner circumferential surface of the lower plate 120 to the vicinity of the outer circumferential surface so as to be stably mounted.

In addition, the lower plate 120 may have a protrusion 121 protruding at a predetermined height on a part of the outer circumferential surface.

The projection 121 may be formed to correspond to the groove 114 formed in the outer rim 112 and may be formed with the groove 114 in the same manner as described above, , Safety functions and assembly / disassembly.

The guide structure 130 may be received in the space of the cover 110 and may be mounted on the upper surface of the lower plate 120 and may be formed in a ring shape so as to be closely inserted into the inner rim 113 of the cover 110 .

Specifically, the guide structure 130 may have an inner circumferential surface that is in close contact with an outer circumferential surface of the inner circumferential surface 113 and smoothly slides the outer circumferential surface and the inner circumferential surface of the guide structure 130 so as to be easily slidable along the inner circumferential surface 113, It may be desirable to process.

When the clearance is generated in the connection portion between the arm 13 and the bucket 15, the guide structure 130 may be provided on the upper portion of the lower plate 120, It may be preferable to form the positive slope so that the diameter of the outer circumferential surface decreases as the outer circumferential surface is lowered so that the clearance compensating member 150 to be described later can easily enter between the surface and the lower surface of the guide structure 130, , It may be preferable that the corner portion where the outer circumferential surface and the lower surface meet is a rounded shape.

Further, the other side of the elastic member 140 to be described later may be compressively mounted on the upper surface of the guide structure 130.

The elastic member 140 may be received in the space portion of the cover 110 and inserted between the cover plate 111 and the guide structure 130. Needless to say, such an elastic member 140 may be a dish spring, a coil spring, or the like, and may include other members having elasticity capable of pressing the guide structure 130.

Specifically, the elastic member 140 may be configured such that one side of the elastic member 140 is press-fitted to the lower surface of the cover plate and the other side of the elastic member 140 is press-fitted to the upper surface of the guide structure 130, And the upper surface of the lower plate 120 can be brought into close contact with each other.

The clearance compensating member 150 may be received in the space of the cover 110 and may be mounted on the upper surface of the lower plate 120 together with the guide structure 130 to compress Can be mounted.

Specifically, the clearance compensating member 150 may be composed of a plurality of snap rings so as to compensate for a clearance portion generated by abrasion of a connection portion between the arm 13 and the bucket 15.

The plurality of snap rings can be sequentially stacked and assembled by increasing the diameter along the outer circumferential surface of the guide structure 130 having the positive inclination, and the plurality of snap rings can be stacked on the positive inclined surface of the guide structure 130 When the adhesion between the lower plate 120 and the guide structure 130 is weakened, a force is applied to the guide structure 130 in a direction to be lifted up and down to compensate for the clearance .

9, the arm 13 and the bucket 15 are connected to each other by the connecting part 40 and the connecting part 40 is connected to the connecting part 40. [ 2, when the free-fall preventing device 100 is assembled to the pin 41, the elastic member 140 is rotated until a certain clearance is generated in the connecting portion between the arm 13 and the bucket 15, The clearance compensating member 150 can not move under the guide structure 130 because the force of the clearance compensating member 150 is greater than or equal to the force of the clearance compensating member 150 so that the cover 110 or the lower plate 120, The compression force of the elastic member 140 is gradually reduced when the arm 13 or the bucket 15 is abraded. When the compression force is weaker than the restoring force of the clearance compensating member 150, 150 are moved below the guide structure 130. Due to the movement of the clearance compensating member 150, the entire height of the clearance preventing apparatus 100 is raised, thereby filling the clearance. The movement of the clearance compensating member 150 further compresses the elastic member 140 by the thickness of the clearance compensating member 150 and increases the compressive force to suppress the movement of the clearance compensating member 150 subsequent thereto. This process is automatically performed until all of the clearance compensating members 150 are moved below the guide structure 130.

As described above, according to the present embodiment, since the repeated relative movement of the working machine 1 makes it possible to automatically fill the extended play portion even if the play between the parts continues and the play is expanded, It is possible to prevent the problem, and it is possible to reduce the maintenance and replacement work flow by eliminating the replacement work until the clearance is expanded beyond the predetermined interval, and the clearance portion is filled every time the clearance is generated, It is possible to prevent noise (noise of contact impact sound) and performance degradation during operation, and to improve product reliability and customer satisfaction, thereby securing product competitiveness.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art that various combinations and modifications may be made without departing from the scope of the present invention. Therefore, it should be understood that the technical contents related to the modifications and applications that can be easily derived from the embodiments of the present invention are included in the present invention.

1: work machine 10: work machine
11: Boom 12: Boom cylinder
13: arm 14: arm cylinder
15: Bucket 16: Bucket cylinder
20: slewing body 21: frame
22: cab 23: engine
24: Counterweight 30:
31: truck or track frame 32:
33: drive wheel 34: endless track
40: Connecting part 41: Pin
42: bushing 100: anti-skid device
110: cover 111: cover plate
111a: insertion hole 112: outer rim
113: inner rim 114:
114a: first horizontal groove 114b: first vertical groove
114c: second horizontal groove 114d: second vertical groove
120: Lower plate 121:
130: guide structure 140: elastic member
150: clearance compensation member

Claims

A cover mounted on a connection part to be assembled to a connection part of the working machine;
A lower plate accommodated in the space portion of the cover;
A guide structure resting on an upper portion of the lower plate;
An elastic member which is press-fitted between the cover and the guide structure and closely contacts the lower plate and the guide structure; And
And a clearance compensating member which is press-fitted to the side surface of the guide structure and moves between the lower plate and the guide structure to lift the guide structure when the adhesion between the lower plate and the guide structure is weakened. Anti-skid device.

The electronic device according to claim 1,
A cover plate having a circular shape and provided with an insertion hole into which the connecting part is inserted,
An outer frame formed along an outer peripheral surface of the cover plate; And
And an inner rim formed along the inner circumferential surface of the cover plate.

[3] The apparatus of claim 2,
Wherein the outer peripheral surface is in intimate contact with the inner peripheral surface of the outer rim and the inner peripheral surface is in intimate contact with the outer peripheral surface of the inner rim to slide between the outer rim and the inner rim by the urging force of the elastic member and the clearance compensating member A device for preventing the connection of machinery.

[4] The apparatus of claim 3,
A groove portion is formed in a part of the inner circumferential surface,
[0028]
A first horizontal groove formed on the inner peripheral surface of the outer rim;
A first vertical groove continuously extending from the one end of the first horizontal groove to a direct downward direction;
A second horizontal groove continuously extending horizontally at a lower end of the first vertical groove; And
And a second vertical groove continuously extending from the one end of the second horizontal groove to the outside in a direct downward direction.

[5] The apparatus of claim 4,
A protrusion is formed on a part of an outer circumferential surface to correspond to the groove,
And the protrusion is located in the first horizontal groove, the first vertical groove, the second horizontal groove, and the second vertical groove, thereby performing the posture fixing function, the play preventing function, the safety function, and the assembly / disassembly function A device for preventing connection of a working machine.

4. The guide structure according to claim 3,
Wherein the inner circumferential surface is in contact with the outer circumferential surface of the inner rim and has a positive inclination in which the diameter becomes smaller as the outer circumferential surface is lowered.

7. The guide structure according to claim 6,
And the corner portion where the outer circumferential surface and the lower surface meet is a rounded shape.

7. The elastic member according to claim 6,
Wherein one side of the cover plate is press-fitted to the lower surface of the cover plate and the other side of the cover plate is press-fitted to the upper surface of the guide structure.

9. The elastic member according to claim 8,
Wherein the spring is a plate spring or a coil spring.

7. The motorcycle according to claim 6, wherein the clearance compensating member comprises:
And a plurality of snap rings.