KR20100090064A - Unification dust seal and shim of construction equipment - Google Patents

Abstract

PURPOSE: An integrated dust seal and core of construction machinery mounted on a joint which connects work equipment with a fixing pin to rotate is provided to increase assembly operation efficiency by simplifying a connection task of a bearing part. CONSTITUTION: An integrated dust seal(18a) and core(20a) of construction machinery comprise a bearing part and a bushing. The bearing part and the bushing pivotally support two members and are pivotally connected with each other using a fixation pin. The dust seal has a ring shape and prevent the inflow of foreign materials into the contacting motion side of the bushing and the fixation pin. The core is plate shape and is integrally formed on the side of the dust seal.

Description

Unification dust seal and shim of construction equipment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to dust seals and shims of construction equipment mounted on joints that rotatably connect work devices such as excavators (booms, arms, buckets, etc.) with fixing pins.

More specifically, the dust seals and shims, which are mounted on bearing parts rotatably supporting two relative moving members (eg, arms connected rotatably with respect to the boom), are formed in a single body, thereby intrinsic to these parts. It relates to a unified dust seal and seam of construction equipment to improve the workability of assembling while maintaining the function.

In general, a work device such as an excavator (say a boom, an arm, a bucket) is rotatably connected to each other through a fixing pin and performs a relative rotational movement due to the driving of a hydraulic cylinder (boom cylinder, etc.). These relative moving parts are rotatably supported by bearing parts and bushings.

As shown in Figure 1, a typical excavator,

A lower traveling body 1 on which a driving means (not shown driving motor, etc.) is mounted on the lower frame;

An upper frame 2 rotatably mounted on the lower traveling body 1,

Cab cap 3 and engine compartment 4 mounted on upper frame 2,

A work device 11 fixed to the upper frame 2 and composed of a boom 6, an arm 8 and a bucket 10 driven by respective hydraulic cylinders 5, 7 and 9,

A counterweight 12 is fixed to the rear of the upper frame 2 and balances the equipment in operation.

As shown in Figure 2, the joint connection device of the construction equipment according to the prior art (for example, refers to the connection portion of the boom and the arm shown in Figure 1),

A fixing pin 13 rotatably connecting the boom 6 and the arm 8,

A bearing portion 14 rotatably supported at right and left sides of the fixing pin 13,

Bushings (15) coupled to the inner surface of the bearing portion (14) and held in close contact with the left and right sides of the fixing pin (13),

A cylindrical tube 17 forming a space portion 16 for receiving the lubricating grease supplied through the nipple on the contact movement surface between the fixing pin 13 and the bushing 15;

A ring-shaped dust seal 18 coupled to the inner surface of the bearing portion 14 on the left and right sides of the bushing 15 and blocking foreign substances such as rainwater and dust from entering the aforementioned contact motion surface from the outside; ,

The gap between the bearing part 14 and the bracket 19 is corrected, and is formed of a metal material and is plate-shaped mounted outside the dust seal 18 to prevent abrasion due to friction upon contact of a relative moving member. And shim 20.

In the joint connection device of the prior art, the above-mentioned dust seal 18 and the shim 20 are manufactured separately, so the cost is increased, and after the dust seal 18 is first coupled to the bearing portion 14, the shim 20 By combining), the work efficiency of assembling is reduced due to the increase in the number of working processes.

In addition, in the process of assembling the shim 20 when the bearing portion 14 and the bracket 19 are fastened, the center of the hole of the shim 20 with respect to the fixing pin 13 must be directly aligned by the operator. Since the work is difficult and the worker approaches the position close to these parts in the assembly line, there is a problem that can cause a safety accident when the heavy parts of the construction equipment falls during the assembly work.

Embodiment of the present invention, by forming the dust seal and the seam mounted on the fixing pin of the joint portion for rotatably connecting the two moving parts in a single unit to reduce the cost cost, to maintain the unique function of these parts It relates to the unified dust seals and shims of construction equipment.

Embodiment of the present invention, it is easy to combine the shim having a dust seal function to the bearing portion to improve the work efficiency of assembling, the dust seal and the shim can be combined even at a long distance away from the assembly line, the weight of the weight drop during the work It is related to the unified dust seal and seam of construction equipment to prevent the occurrence of safety accidents.

The unified dust seal and shim of construction equipment according to an embodiment of the present invention,

In the dust seal and the shim of construction equipment comprising a bearing and a bushing rotatably connected to the two moving members rotatably connected by a fixing pin,

Ring-shaped dust seal that blocks foreign matter from entering the contact movement surface between the fixing pin and the bushing, and is formed integrally on the side of the dust seal and compensates for the gap between the members that move relative to each other. It includes a plate-shaped shim to prevent wear.

The unified dust seal and shim of construction equipment according to an embodiment of the present invention configured as described above has the following advantages.

Reducing the cost cost of the shim having a dust seal function mounted on the fixing pin of the joint portion rotatably connecting the two moving parts, and the unique function of these parts is maintained, thereby ensuring reliability in the industry.

In addition, the work of combining the shim with the dust seal function to the bearing part is simple, which improves the work efficiency of assembling, and the shim can be connected even at a long distance away from the assembly line. Can be.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to describe in detail enough to enable those skilled in the art to easily practice the invention, and therefore It does not mean that the technical spirit and scope of the present invention is limited.

As shown in Figure 3 and 4, the unified dust seal and shim of construction equipment according to an embodiment of the present invention,

A dust seal of construction equipment including a bearing and a bushing rotatably supporting two members (eg, a boom and an arm connected rotatably to the boom) rotatably connected by a fixing pin; In the seam,

The gap between the ring-shaped dust seal 18a which blocks foreign matter from entering the contact motion surface between the fixing pin 13 and the bushing 15, and the member which is integrally formed on the side surface of the dust seal 18a and moves relatively. And a plate-shaped shim 20a for compensating for and preventing wear due to direct contact of the relative moving member.

At this time, the configuration except for the dust seal 18a which is made of a single body and is coupled to the inner surface of the bearing portion 14 and the shim 20a mounted between the bearing portion 14 and the bracket 19 is shown in FIG. 2. Since they are substantially the same as the conventional configuration shown, detailed description thereof will be omitted, and overlapping reference numerals will be denoted the same.

Hereinafter, with reference to the accompanying drawings an example of the use of the unified dust seal and shim of construction equipment according to an embodiment of the present invention will be described in detail.

As shown in FIG. 4, the bearing member 14 and the bushing 15 are rotatably supported by a member connected to allow relative movement by the fixing pin 13. At this time, by the ring-shaped dust seal 18a coupled to the inner surface of the bearing part, foreign matters such as dust, rain water and the like may be blocked from the outside into the contact movement surface between the fixing pin 13 and the bushing 15.

A member (for example, the bearing portion 14 and the bracket 19) which is formed as a single body with the above-mentioned dust seal 18a and which is relatively moved by the plate-shaped shim 20a mounted on the outer surface of the bearing portion 14 Gap), and it is possible to prevent wear due to direct contact of members made of these metal materials.

In addition, as a single assembly of the dust seal (18a) and the shim (20a) consisting of a single assembly to the bearing portion 14 to the outside of the fixing pin 13, assembling is improved, and the operator is far from the assembly line Even in the dust seal (18a) can be assembled shim (20a) has a function to provide convenience to the operator and can increase the safety during assembly work.

1 is a schematic side view showing a general configuration of an excavator;

2 is a schematic view of a joint connecting device of the construction apparatus according to the prior art,

3 is a perspective view of a unified dust seal and shim of construction equipment according to an embodiment of the present invention,

Figure 4 is a state diagram using the unified dust seal and shim of construction equipment according to an embodiment of the present invention.

* Explanation of symbols used in the main part of the drawing

13; Push pin

14; Bearing

15; bushing

16; Space

17; tube

18a; Dust seal

19; Bracket

20a; Shim

Claims (1)

In dust seals and shims of construction equipment, including bearings and bushings, which are rotatably connected by fastening pins and rotatably supporting two moving members: A ring-shaped dust seal that blocks foreign matter from entering the contact motion surface between the fixing pin and the bushing, and a member that is formed integrally with the side surface of the dust seal and compensates for a gap between the members moving relative to each other. United dust seals and shims in construction equipment comprising plate shims that prevent wear due to direct contact.

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