KR200280733Y1 - Compensation Device For Axle Load Of Quick Coupler Use of Excavator - Google Patents

Abstract

The present invention is a quick coupler for excavators in which the impact force in the axial direction perpendicular to the pair of coupler pins is not directly transmitted to the piston rod during attachment mounting work on the quick coupler attached to the excavator arm and link tip. It is a compensation device for the celebration, and is fixed to the piston by the movement of the piston and the piston which is symmetrically formed in the rod cover with the piston housing and spring fixed between the cylinder tube and the contact ring and the key to surround the outer circumference of the piston. In the excavator ie coupler consisting of a coupler pin for actuating operation, provided with a flexible member that is not directly transmitted to the piston rod axial impact force acting on the pair of coupler pin of the quick coupler for the excavator It is characterized by consisting of a coupler pin.

Description

Compensation Device for Axle Load Of Quick Coupler Use of Excavator}

The present invention acts on a pair of coupler pins when the attachment (4) is mounted on the female side coupler (3a) and link side coupler (3b) attached to the tip of the main arm (1) and the working link (2) of the excavator. The present invention relates to a celebration compensation device for an excavator quick coupler having a structure in which an impact force in an axial direction is not directly transmitted to a piston rod.

In general, excavator attachments are quick couplers used in the use of breakers and crushers, which are used to break and crush buckets, rocks, asphalt, and buildings used to dig soil and sand. It is configured to selectively mount the attachment using.

Fig. 1 is a perspective view showing an excavator equipped with a quick coupler, and the female side coupler 3a and the link side coupler 3b are interlocked by the forward and backward operation of the excavator operating cylinder 301. When the hydraulic pressure is supplied by the forward port, the piston expands and engages. As shown in the example of FIG. 5 of the prior art, the piston housing 6 is fixed to the cylinder tube 5 and the fixing bolt 91 to surround the outer periphery of the pistons 7a and 7b, and the spring 11 is mounted. The coupler pins 21a and 21b, which are inserted into the rod covers 9a and 9b and are fixed to the pistons 7a and 7b by the lateral symmetrical piston movement, are configured to deviate symmetrically. It is.

The coupler pins are inserted at both sides of the piston housing 6 and fitted with pistons 7a and 7b having mechanical seals at their inner ends. Fig. 6 is an enlarged perspective view showing part B of Fig. 5, which has a recessed inner groove into which the coupling ring 101 can be assembled at the ends of the piston rods 8a and 8b, and is also assembled into the inner groove. The ring 101 is configured to be coupled to the coupler pins 21a and 21b by a close contact bolt 201.

However, in the prior art configured as described above, the excavator has a problem in that deformation such as bending occurs as a structure in which the flexibility in which the impact force in the direction perpendicular to the axial direction is directly transmitted to the piston rod is not allowed on the coupler pin of the quick coupler. .

The above problems cause the piston rod to bend and cause damage to the piston with the mechanical seal, which leads to leakage and loss of function. Eventually, a problem of early replacement occurs. As a result, there is a disadvantage that the obstacles in the work of the excavator is lowered the work efficiency, which causes a problem that can cause many difficulties in the progress of the excavation work.

The present invention has been devised to solve the above-mentioned conventional problems, the piston rod in the coupler pins to form a flexible member to the end of the piston rod impact force in the direction perpendicular to the pair of coupler pins of the quick coupler It is designed for the purpose of extending the life of the piston rod by avoiding direct transmission to it.

The present invention as a means for achieving the above object,

A pair of coupler pins are fixed to the cylinder tube and the piston housing is fixed with the contact ring and the key to surround the outer periphery of the piston. Is a quick coupler for excavators

Quick coupler for excavators is characterized in that it consists of a coupler pin provided with a member having a flexibility that the impact force in the axial direction perpendicular to the pair of coupler pin is not directly transmitted to the piston rod.

1 is a state diagram used in one embodiment of the present invention.

2 is a state before the expansion operation of the coupler pin of the quick coupler of the present invention,

3 is a cross-sectional view of a state in which the expansion operation of the coupler pin is started.

Figure 4 is an enlarged perspective view showing a portion A of Figure 3 according to the present invention.

5 is a cross-sectional quick coupler of the prior art.

FIG. 6 is an enlarged perspective view illustrating part B of FIG. 5;

※ Explanation of code for main part of drawing

1: Arm of main boom 2: Operation link

3a: female side coupler 3b: link side coupler

4: attachment 5: cylinder tube

6: piston housing 7a, 7b: piston

8a, 8b: Piston Rod 9a, 9b: Rod Cover

10a, 10b: piston head 11: spring

21a, 21b: Coupler pin 31: Forward pressure chamber

41: reverse pressure chamber 51: key

61: contact ring 71: retaining ring

81: member having flexibility 91: fixing bolt

101: coupling ring 201: contact bolt

301: pin cover 401: pin cover bolt

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a state before starting the expansion operation of the coupler pin, Figure 3 is a cross-sectional view showing a state in which the expansion operation of the coupler pin is started,

The cylinder tube (5) is fixed to the piston housing (6) by the contact ring (61) and the key (51), and the pressure line formed in the longitudinal direction inside the piston housing (6) is a rod cover (9a) (9b). To the reverse pressure chamber 41 between and the piston heads 10a and 10b to reduce the pistons 7a and 7b. In addition, the pressure line penetrating the cylinder tube 5 and formed in the piston housing 6 is supplied to the forward pressure chamber 31 to expand. At this time, the working space is configured to allow the coupler pins 21a and 21b of the cylinder to allow the piercing operation.

4 is an enlarged perspective view illustrating a portion A of FIG. 3 according to the present invention.

As shown in FIG. 4, the flexible member 81 at the end of the piston rods 8a and 8b has a recessed groove and a step inside the pair of coupler pins 21a and 21b. The cover 301 is surrounded by a form. In addition, the member 81 having the flexibility is composed of a structure that can be fixed by the fixing ring 71 is locked with a pin cover bolt 401.

The flexible member 81 is a flexible member 81 which does not directly transmit the impact force acting on the coupler pins 21a and 21b to the piston rods 8a and 8b. It can comprise with an apparatus. The present invention configured as described above has an impact force directly applied to the ends of a pair of coupler pins 21a and 21b during attachment mounting of an excavator, wherein the impact force is transmitted to the pair of coupler pins 21a and 21b. By constructing a flexible member 81 fixed to the ends of the piston rod (8a) (8b) by absorbing the impact force acting on the piston rod is to significantly reduce the impact force acting directly on the piston rod as in the prior art. .

According to the above-described design, a simple structure for fixing a flexible member to the end of the piston rod inside the quick coupler pin for an excavator is caused by the bending of the piston rod, resulting in damage to the piston with the mechanical seal, resulting in leakage. It is a practical design to increase the efficiency of excavation work by preventing the operation of the quick coupler pin smoothly.

Claims (1)

A pair of couplers that are fixed to the piston by the movement of the piston and the piston, which are symmetrically configured, are inserted into the rod cover with the piston housing and the spring fixed between the cylinder tube and the contact ring and the key to surround the outer circumference of the piston. A quick coupler for excavators comprising a pin, characterized in that the coupler pin is provided with a flexible member such that the impact force in the axial direction acting on the pair of coupler pins of the quick coupler for the excavator is not directly transmitted to the piston rod. Compensation device for the celebration of quick couplers for excavators.