CN116752593A

CN116752593A - Rotary quick connector for excavator

Info

Publication number: CN116752593A
Application number: CN202310243606.7A
Authority: CN
Inventors: 宋壮燮
Original assignee: Hyundai Abbott
Current assignee: Hyundai Abbott
Priority date: 2022-03-14
Filing date: 2023-03-14
Publication date: 2023-09-15
Also published as: KR20230134246A

Abstract

The invention relates to a rotary quick connector for an excavator. The upper connecting part is connected with the arm support of the excavator. The lower connecting portion is disposed downward and separated from the upper connecting portion, and the attachment is attached and detached. The power transmission unit has: a housing fixed to a lower surface of the upper connection part, the projection protruding along an inner circumference thereof; a rotation transmission body fixed on the upper surface of the lower connection part, wherein the upper flange and the lower flange are protruded along the periphery and enter the upper side and the lower side of the protruding block; the sliding bearing rotatably supports the rotation transmitting member with respect to the housing. The driving unit rotates the rotation transmitting body. The rotation transmitting body has: a first rotation transmitting body formed with an upper flange; a second rotation transmitting body having a lower flange formed thereon, the second rotation transmitting body being fixed to the lower connecting portion in a state of being fixed to the lower surface of the first rotation transmitting body; a first wear member; and a second wear member.

Description

Rotary quick connector for excavator

Technical Field

The present invention relates to a rotary quick connector for an excavator, and more particularly, to a rotary quick connector in which an attachment (attachment) is replaced according to the work application of an excavator.

Background

Generally, an excavator used for construction and civil engineering works is a work of excavating earth by using an excavating bucket (bucket), a work of crushing a concrete and rock layer by using a crusher (cutter), a work of crushing a concrete building by using a crusher (cutter), a work of cutting a reinforcing bar and a girder, a work of transporting waste and iron, trees, stones, and the like by using a gripper (grab), and various engineering works can be performed in place of various kinds of accessory devices for various purposes.

In general, an attachment is configured to be detachable from a boom of an excavator so as to be replaceable according to the work application. In the past, the replacement work needs to be manually carried out, and time and labor are consumed.

However, recently, a quick connector, in which a separate connector is mounted to the boom end of an excavator to facilitate attachment and detachment of an attachment, has been developed and widely used. In addition, in order to make the work easier in a small space and a specific posture, a rotary connector is widely used which is composed of an upper connecting portion for connecting an excavator boom, a power transmission portion for transmitting a rotational driving force generated by a driving portion to a lower connecting portion, and a lower connecting portion for detachably connecting an attachment, and which enables the attachment attached to the lower connecting portion to rotate 360 °.

However, as described above, since a plurality of functions are added to facilitate operation, the structure becomes complicated, and problems occur in durability and functions of the power transmission device, such as gear damage, structural damage, rapid wear, and the like of the power transmission device.

Disclosure of Invention

The invention provides a rotary quick connector for an excavator, which can improve the durability and maintainability of the whole power transmission part.

In order to accomplish the above object, the rotary quick connector for an excavator according to the present invention includes an upper connection portion, a lower connection portion, a power transmission portion, and a driving portion. The upper connecting part is connected with the arm support of the excavator. The lower connecting part is separated from the upper connecting part downwards and is used for assembling and disassembling the accessory device. The power transmission unit has: a housing fixed to a lower surface of the upper connection part, and having a projection protruding along an inner circumference thereof; a rotation transmitting body fixed to an upper surface of the lower connecting portion, and having upper and lower flanges protruding along outer circumferences thereof into upper and lower sides of the protruding block; and a slide bearing that rotatably supports the rotation transmitting body with respect to the housing. The driving unit rotates the rotation transmitting body.

The rotation transmitting body includes: a first rotation transmitting body formed with the upper flange; a second rotation transmitting body that is fixed to the lower connecting portion in a state of being fixed to a lower surface of the first rotation transmitting body, the second rotation transmitting body being formed with the lower flange; a first wear member attached to an outer peripheral surface of the first rotation transmitting body opposite to an inner surface of the housing; and a second wear member mounted on a lower surface of the upper flange of the first rotation transmitting body opposite to an upper surface of the projection block.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, since the first rotation transmitting body has the first and second wear members, the wear due to the rotational friction can be delayed, and the service life of the first rotation transmitting body can be prolonged.

Further, according to the present invention, even if the first and second wear members are worn out, the first rotation transmitting body can be replaced easily, the durability of the first rotation transmitting body can be enhanced, and the overall durability of the power transmitting portion can be enhanced, and the maintenance quality can be improved. Meanwhile, the loss cost generated during machine maintenance can be reduced, and the operation efficiency is improved.

Drawings

Fig. 1 is a schematic view of a rotary quick connector for an excavator according to one embodiment of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a schematic diagram of the exploded power transmission section and the driving section.

Fig. 4 is a schematic view of the first rotation transmitting body in fig. 3 exploded.

Fig. 5 is a cross-sectional view taken along line A-A of fig. 2.

Fig. 6 is a sectional view, which is illustrated with the left area of fig. 5 enlarged.

Fig. 7 is a sectional view of the right side area of fig. 5 enlarged.

Description of the reference numerals

100 … upper side connecting part

110 … connecting plate 120 … connecting pin

200 … … lower side connecting part

300 … power transmission part

301 Outer shell of bolt part 310 … of 302, 303 and 303 …

Wear-resistant part for adjusting gap of 311 … protruding block 316 …

317 … core 318 … anti-disengaging plate

320a … first rotation transmitting body

320b. second rotary transmitting body 321 … upper flange

322 … lower flange 330 … plain bearing 341 … first wear part 342 … second wear part

351 … first sealing member 352 … second sealing member

360 … first wear part 361 … first mounting groove

362a. first bolt 362b … first fastening hole

362c. first screw slot 363a … first anti-rotation pin

363b. Inboard slot 363c … outboard slot

370 … second wear part 371 … second mounting groove

372a. second bolt 372b … second fastening hole

372c. second screw groove 373a … second anti-rotation pin

373b. upper groove 373c … lower groove

400 … drive part

410 … shell 420 … worm wheel shaft

Rolling bearing 440. Motor

451452 … cover 461 … third sealing member

462 … fourth sealing member

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same components, and detailed descriptions of known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted.

Embodiments of the present invention are provided to more fully explain the present invention to those having ordinary skill in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for more clear explanation.

Fig. 1 is a schematic view of a rotary quick connector for an excavator according to one embodiment of the present invention. Fig. 2 is a front view of fig. 1. Fig. 3 is a schematic diagram of the exploded power transmission section and the driving section. Fig. 4 is a schematic view of the first rotation transmitting body in fig. 3 exploded. Fig. 5 is a cross-sectional view taken along line A-A of fig. 2. Fig. 6 is a sectional view, which is illustrated with the left area of fig. 5 enlarged. Fig. 7 is a sectional view of the right side area of fig. 5 enlarged.

Referring to fig. 1 to 7, the rotary quick connector for an excavator according to one embodiment of the present invention includes an upper connection part 100, a lower connection part 200, and a power transmission part 300, and a driving part 400.

The upper connection part 100 is connected to a boom of an excavator. The upper connection part 100 includes a plurality of connection plates 110 separated from each other at an upper side and a plurality of connection pins 120 having respective ends fixed to the plurality of connection plates 110. The upper connection part 100 may be connected with the boom and the H-port of the excavator by a plurality of connection pins 120.

The lower connecting portion 200 is spaced downward from the upper connecting portion 100. The attachment can be attached to and detached from the lower connection portion 200. The lower connecting portion 200 is composed of a general structure, so that the attachment and detachment of the attachment are facilitated.

For example, the lower connecting portion 200 is driven so that the movable hook is coupled to or decoupled from the movable hook connecting pin of the attachment by the hydraulic cylinder in a state where the fixed hook is coupled to or fastened to the fixed hook connecting pin of the attachment, thereby loading or decoupling the attachment.

The power transmission unit 310 includes a housing 310, a rotation transmission body 320, and a slide bearing 300. The housing 310 is fixed to the lower surface of the lower connection part 100. The case 310 is configured to have an internal space and to be opened at an upper side and a lower side. The upper opening periphery of the housing 310 is larger than the lower opening periphery, and can be bolted to the lower surface of the upper connection part 100 by the bolt member 301.

In the case 310, the protruding block protrudes along the inner circumference. The protruding block 311 may be disposed closer to the lower connection part 200 than the upper connection part 100. The protruding block 311 may continuously protrude along the inner circumference of the case 310 with a prescribed sectional area. The protruding block 311 can be formed in a state where the lower surface is planar.

The slit-adjusting wear-resistant member 316 may be accommodated in a space on the lower side of a slit-adjusting groove formed at the lower surface edge of the housing 310. The slit-adjusting wear member 316 protrudes downward from the slit-adjusting groove by a certain length from the core member 317, and contacts the upper surface of the lower-side connecting portion 200, thereby rotatably supporting the lower-side connecting portion 200. The gap adjustment wear member 316 is worn out in place of the lower connecting portion 200 when the lower connecting portion 200 rotates, and can prevent the lower connecting portion 200 from being damaged.

The core member 317 is accommodated in an upper space of the slit adjusting groove, so that the protruding length of the slit adjusting wear member 316 can be adjusted. When the core member 317 and the slit-adjusting wear member 316 are accommodated in the slit-adjusting groove, the anti-detachment plate 318 blocks the entrance and exit of the slit-adjusting groove, and prevents the core member 317 and the slit-adjusting wear member 316 from being detached through the entrance and exit.

The rotation transmitting body 320 is fixed to the upper surface of the lower connecting portion 200, protrudes along the outer circumferences of the upper flange 321 and the lower flange 322, and enters the upper side and the lower side of the protruding block 311. The rotation transmitting body 320 receives a rotational force from the driving unit 400 and is rotationally driven, thereby simultaneously rotating the lower connection unit 200.

The rotation transmitting body 320 is prevented from being separated from the housing 310 in the upward and downward directions by inserting the protruding pieces 311 of the housing 310 between the upper flange 321 and the lower flange 322. The upper flange 321 and the lower flange 322 may be continuously protruded along the outer circumference of the rotation transmitting body 320 with a certain sectional area. As for more details of the rotation transmitting body 320, it will be described later.

The first wear-resistant member 341 is attached so as to protrude a certain length toward the outer peripheral surface of the rotation transmitting body 320 in a state of being partially inserted into an attachment groove formed in the upper inner peripheral surface of the housing 310. The first wear-resistant member 341 is used to prevent damage to the upper inner peripheral surface of the housing 310 when the rotation transmitting body 320 rotates relative to the housing 310.

The second abrasion resistant member 342 is installed in such a manner as to protrude a certain length toward the lower surface of the protruding block 311 in a state of being partially inserted into the installation groove formed at the upper surface of the lower flange 322. The second abrasion resistant member 342 serves to prevent damage to the upper surface of the lower flange 322 and the lower surface of the protruding block 311 when the rotation transmitting body 320 rotates with respect to the housing 310.

The first sealing member 351 can maintain a gas seal between the rotation transmitting body 320 and the upper connecting portion 100. The second sealing member 322 may maintain a gas seal between the lower flange 322 and the housing 310.

The slide bearing 330 rotatably supports the rotation transmitting body 320 to rotate relative to the housing 310. The slide bearing 330 is disposed between the upper flange 321 and the projection 311 of the housing 310, and rotatably supports the rotation transmitting body 320 to rotate relative to the housing 310. The sliding bearing 330 may be installed across the upper and inner surfaces of the protruding block 311.

The driving unit 400 rotates the rotation transmitting body 320. The driving unit 400 rotates the rotation transmitting body 320 by 360 degrees, and rotates the lower connecting portion 200, which is screwed and fixed to the rotation transmitting body 320 by the bolt member 302, by 360 degrees, so that the rotary quick connector can be more easily operated in a small space and in a specific posture.

For example, the driving unit 400 includes a housing 410, a worm shaft 420, a rolling bearing 430, a motor 440, and covers 451, 452. The case 410 has an internal space, and is formed in the case 310 in a state where both ends thereof are opened to a portion of the rotation transmitting body 320. The worm shaft 420 is engaged with the worm wheel of the rotation transmitting body 320 in the housing 410.

The rolling bearings 430 rotatably support both ends of the worm shaft 420 with respect to the covers 451, 452. The motor 440 rotates the worm shaft 420 while being supported by the housing 410. Covers 451, 452 cover both end openings of the case 410. The third and fourth sealing members 461, 462 can maintain gas tightness between the covers 451, 452 and the worm shaft 420.

On the other hand, the rotation transmitting body 320 includes a first rotation transmitting body 320a, a second rotation transmitting body 320b, a first wear member 360, and a second wear member 370.

The first rotation transmitting body 320a forms an upper flange 321. The first rotation transmitting body 320a forms a worm wheel engaged with the worm wheel shaft 420 along the outer circumference. The first rotation transmitting body 320a may be formed in a hollow form.

The second rotation transmitting body 320b forms a lower flange 322. The second rotation transmitting body 320b may be formed in a hollow form. The second rotation transmitting body 320b is fixed to the lower connecting portion 200 in a state of being fixed to the lower surface of the first rotation transmitting body 320 a. The first rotation transmitting body 320a may be bolted to the second rotation transmitting body 320b by the bolt member 303. The first rotation transmitting body 320a is inserted through an upper side opening of the housing 310, and the second rotation transmitting body 320a is inserted through a lower side opening of the housing 310.

The rotation transmitting body 320 is configured to assemble and disassemble the first and second rotation transmitting bodies 320a and 320b by interposing the protruding block 311 of the housing 310 therebetween, so that the assembly and disassembly of the housing 310 can be conveniently performed. Also, the first rotation transmitting body 320a can be easily assembled and disassembled with the second rotation transmitting body 320b, thereby facilitating replacement of the first and second wear members 360, 370.

The first wear member 360 is attached to the outer peripheral surface of the first rotation transmitting body 320a opposite to the inner peripheral surface of the housing 310. The first wear member 360 can prevent damage to the first rotation transmitting body 320a by replacing the first rotation transmitting body 320a with wear when the first rotation transmitting body 320a rotates.

The first wear member 360 may be configured to contact a first wear member 341 mounted on the inner surface of the housing 310. The first wear member 360 is in contact with the first wear member 341, and wear generated between the first rotation transmitting body 320a and the first wear member 341 due to friction generated by rotation can be delayed, thereby preventing damage to the first rotation transmitting body 320 a.

The first wear member 360 is annular. The first wear part 360 may be continuously formed in the circumferential direction with a certain sectional area. The first wear member 360 may have a quadrilateral cross-sectional area. The height of the first wear member 360 may be formed to be greater than the thickness between the inner and outer circumferential surfaces. The outer circumferential surface of the first wear member 360 has the same area or larger than the outer circumferential surface of the first wear member 341, and can be in contact with each other as a whole with the first wear member. The first wear member 360 may contact the first wear member 341 to generate rotational friction in a state where contact between the first wear member 341 and the first rotation transmitting body 320a is prevented.

The first wear member 360 may be constructed of a metallic or non-metallic material. The first wear part 360 may be constructed of an engineering plastic with lubrication, such as TP601OILON, or the like. TP601OILON is a material that maintains permanent lubricity by adding a liquid lubricant to MC Nylon Mono Cast Nylon, has a low coefficient of friction, and has excellent durability.

The first rotation transmitting body 320a may be provided with a first mounting groove 361 for mounting the first wear member 360. The first mounting groove 361 is formed in an annular recess in the circumferential direction on the upper outer peripheral surface of the first rotation transmitting body 320 a. The first installation groove 361 has an opening at an upper side of a size allowing the first wearing member 360 to come in and go out. The first mounting groove 361 can be easily inserted into or separated from the first abrasion part 360 through the upper side opening.

The first mounting groove 361 may be formed to have a size in which the first wear member 360 is inserted so that the outer circumferential surface of the first wear member 360 and the outer circumferential surface of the first rotation transmitting body 320a are positioned on the same vertical plane without a height difference. Of course, the first mounting groove 361 may be formed so as to protrude the first wear member 360 by a predetermined length toward the inner peripheral surface of the housing 310.

The first wear member 360 is attachable to and detachable from the first rotation transmitting body 320a by a first attaching and detaching mechanism. Even if the first wear member wears, the first loading and unloading mechanism can easily replace the worn first wear member with a new one.

For example, the first attaching/detaching mechanism is constituted by at least one first bolt 362a. In the first wear member 360, the first fastening holes 362b are generated according to the number of the first bolts 362a. The first fastening hole 362b is formed to penetrate horizontally by a size penetrating the first bolt 362a in the first wear part. The first fastening holes 362b are arranged at a set interval in the circumferential direction of the first wear member 360. The first rotation transmitting body 320a has first screw grooves 362c formed in a vertical surface in the first mounting groove 361 in correspondence with the first fastening holes 362b, respectively. The first screw groove 362c is screw-coupled with the first bolt 362a.

The first bolt 362a may introduce the head into the first fastening hole 362b in a state of being coupled with the first thread groove 362c. Of course, it is also possible to form in a form in which the first fastening hole 362b is introduced into the head of the first bolt 362a.

The first screw 362a is fastened to the first screw groove 362c through the first fastening hole 362b of the first wear member 360 in a state where the first wear member 360 is mounted to the first mounting groove 361, whereby the first wear member 360 can be fixed to the first rotary body 320 a. In this case, the first bolt 362a is released from the first screw groove 362c and separated from the first fastening hole 362b, and thus the first wear member 360 can be released from the first rotation transmitting body 320 a.

As another example, although not shown, the first attaching/detaching mechanism may be composed of at least one fixing pin, and the first rotation transmitting body may have a groove for fixedly connecting the fixing pin, so that various arrangements may be made without limitation to examples.

The first wear member 360 is prevented from rotating relative to the first rotation transmitting body 320a by the first rotation preventing mechanism. The first wear member 360 rotates together with the first rotation transmitting body 320a, and when friction occurs with the first wear member 341, the first rotation preventing mechanism can prevent sliding of the first wear member 360 of the first rotation transmitting body 320a in the rotation direction, and therefore breakage of the first attaching/detaching mechanism can be prevented.

For example, the first rotation preventing mechanism is constituted by at least one first rotation preventing pin 363 a. The first wear member 360 has an inner groove 363b open at the upper side and recessed to a set depth on the inner peripheral surface. The first rotation transmitting body 320a may have an upper opening in a vertical plane within the first mounting groove 361, and an outer groove 363c recessed to a set depth.

The inner recess 363b may be formed to be inserted into one half of one side of the first rotation preventing pin 363a through the upper side opening. The outer recess 363c may be formed to be inserted through the upper opening in the other half of the outer circumference of the first rotation preventing pin 363 a. The inner and outer grooves 363b, 363c are formed to a depth to which the first rotation preventing pin 363a can be completely introduced in a state where the bottom surface supports the lower end of the first rotation preventing pin 363 a. Because the first rotation preventing pin 363a is inserted into the inner and outer grooves 363b, 363c, the first wear member 360 can prevent rotation relative to the first rotation transmitting body 320 a.

The second wear member 370 is mounted to the lower surface of the upper flange 321 of the first rotation transmitting body 320a opposite to the upper surface of the protruding block 311. The second wear member 370 wears in place of the upper flange 321 of the first rotation transmitting body 320a when the first rotation transmitting body 320a rotates, and thus can prevent damage to the first rotation transmitting body 320 a.

The second wear member 370 may be configured to contact the sliding bearing 330 mounted across the upper and inner surfaces of the protruding block 311. The second wear member 370 is in contact with the slide bearing 330, and thus wear generated between the first rotation transmitting body 320a and the slide bearing 330 due to friction generated by rotation can be delayed, thereby preventing damage to the first rotation transmitting body 320 a.

The second wear member 370 is formed in an annular form. The second wear member 370 is continuously formed in the circumferential direction with a specific cross section. The second wear member 370 may have a quadrilateral cross-sectional area. The height of the second wear member 370 may be formed to be greater than the thickness between the inner and outer circumferential surfaces.

The lower surface of the second wear member 370 has the same or larger area as the upper surface of the sliding bearing 330 and can be in contact with each other integrally with the upper surface of the sliding bearing 330. The second wear member 370 may contact the sliding bearing 330 in a state of preventing contact between the sliding bearing 330 and the upper flange 321 to generate rotational friction. The second wear member 370 may be constructed of a metallic or non-metallic material. The second wear member 370 may be formed of the same material as the first wear member 360.

The first rotation transmitting body 320a may be provided with a second mounting groove 371 for mounting the second wear member 370. The second mounting groove 371 is formed in an annular recess in the lower surface of the upper flange 321 of the first rotation transmitting body 320a in the circumferential direction. The second mounting groove 371 is opened to the side of the inside of the upper flange 321, and the inner surface of the second wear member 370 can be brought into contact with the outer surface of the second rotating body 320b through the opening.

The second mounting groove 371 may be formed to be sized to insert the second wear member 370 such that the lower surface of the second wear member 370 is positioned on the same horizontal plane as the lower surface of the upper flange 321 without a height difference. Of course, the second mounting groove 371 may be formed so as to protrude the second wear member 370 to the slide bearing 330 by a predetermined length.

The second wear member 370 is attachable to and detachable from the first rotation transmitting body 320a by a second attaching and detaching mechanism. Even if the second wear member wears, the second loading and unloading mechanism can easily replace the worn second wear member with a new one.

For example, the second attaching/detaching mechanism is constituted by at least one second bolt 372a. In the second wear member 370, second fastening holes 372b are generated according to the number of second bolts 372a. The second fastening hole 372b is vertically formed to penetrate the second bolt 372a in the second wear part by a size of penetrating the second bolt. The second fastening holes 372b are arranged at a set interval in the circumferential direction of the second wear member 370. The first rotation transmitting body 320a has second screw grooves 372c formed in a horizontal plane in the second mounting groove 371 in correspondence with the second fastening holes 372b, respectively. The second thread groove 372c is screw-coupled with the second bolt 372a.

The second fastening hole 372b may be formed in a form in which a head of the second bolt 372a is insertable. Of course, the second bolt 372a may also introduce the head into the second connection hole 372b while being connected to the second thread groove 372c.

The second wear member 370 is fastened to the second screw groove 372c through the second fastening hole 372b of the second wear member 370 in a state of being mounted to the second mounting groove 371, whereby the second wear member 370 can be fixed to the first rotary swivel 320 a. In this case, the second bolt 372a is loosened from the second thread groove 372c and separated from the second fastening hole 372b, and thus the second wear member 370 can be released from the first rotation transmitting body 320 a.

As another example, although not shown, the second attaching/detaching mechanism may be composed of at least one fixing pin, and the first rotation transmitting body may have a groove for fixedly connecting the fixing pin, so that various arrangements may be made without limitation to examples.

The second wear member 360 is prevented from rotating relative to the first rotation transmitting body 320a by a second rotation preventing mechanism. The second wear member 370 rotates together with the first rotation transmitting body 320a, and when friction occurs with the slide bearing 330, the second rotation preventing mechanism can prevent sliding of the second wear member 370 in the rotation direction of the first rotation transmitting body 320a, and therefore breakage of the second attaching/detaching mechanism can be prevented.

For example, the second rotation preventing mechanism is constituted by at least one second rotation preventing pin 373 a. The second wear member 370 has an upper groove 373b recessed to a set depth in an upper surface. The first rotation transmitting body 320a may have a lower groove 373c recessed to a set depth at a horizontal plane within the second mounting groove 371. The upper groove 373b may be formed to be inserted into a lower portion of the second rotation preventing pin 373 a. The lower groove 373c may be formed to be inserted into an upper portion of the second rotation preventing pin 373 a. By inserting the second anti-rotation pin 373a into the upper and lower side grooves 373b, 373c, the second wear member 370 can prevent rotation relative to the first rotation transmitting body 320 a.

As described above, according to the rotary quick connector for an excavator of the present embodiment, the first wear member 360370 is provided in the first rotation transmitting body 320a, so that the wear due to the rotational friction can be delayed, and the life of the first rotation transmitting body 320a can be delayed.

Also, according to the rotary quick connector for an excavator of the present embodiment, even if the first and second wear members are worn out, replacement can be easily performed, and the durability of the first rotation transmitting body 320a can be increased while increasing the overall durability of the power transmitting portion and improving the maintenance quality. Therefore, the cost of loss and the improvement of the operation efficiency during maintenance can be reduced.

The present invention has been described in detail with reference to specific examples, but the present invention is not limited to the above-described examples, and various modifications can be made by those skilled in the art without departing from the technical spirit of the present invention.

Claims

1. A rotary quick connector for an excavator, comprising:

an upper connection part connected with the arm support of the excavator;

a lower connecting part which is arranged separately from the upper connecting part downwards and is used for assembling and disassembling the accessory device;

a power transmission unit having: a housing fixed to a lower surface of the upper connection part, and having a projection protruding along an inner circumference thereof; a rotation transmitting body fixed to an upper surface of the lower connecting portion, and having upper and lower flanges protruding along outer circumferences thereof into upper and lower sides of the protruding block; and a slide bearing that rotatably supports the rotation transmitting body with respect to the housing; and

a driving unit that rotates the rotation transmitting body,

the rotation transmitting body includes:

a first rotation transmitting body formed with the upper flange;

a second rotation transmitting body that is fixed to the lower connecting portion in a state of being fixed to a lower surface of the first rotation transmitting body, the second rotation transmitting body being formed with the lower flange;

a first wear member attached to an outer peripheral surface of the first rotation transmitting body opposite to an inner surface of the housing; and

and a second wear member mounted to a lower surface of the upper flange of the first rotation transmitting body opposite to the upper surface of the projection.

2. The rotary quick connector for an excavator according to claim 1, wherein,

the first wear member is disposed in contact with a first inner wear member mounted on an inner peripheral surface of the housing,

the second wear member is disposed in contact with a sliding bearing mounted across an upper surface and an inner peripheral surface of the projection block.

3. The rotary quick connector for an excavator according to claim 1, wherein,

the first rotation transmitting body has a first mounting groove and a second mounting groove in which the first wear member and the second wear member are mounted, respectively.

4. The rotary quick connector for an excavator according to claim 1, wherein,

the first wear member and the second wear member are detachable from the 1 st rotation transmitting body by a 1 st attachment/detachment mechanism and a 2 nd attachment/detachment mechanism.

5. The rotary quick connector for an excavator according to claim 1, wherein,

the first wear member and the second wear member are prevented from rotating relative to the first rotation transmitting body by a first rotation preventing mechanism and a second rotation preventing mechanism.

6. The rotary quick connector for an excavator according to claim 1, wherein,

the first and second wear members are constructed of a metallic or non-metallic material.