KR20070093217A - Door striker for heavy construntion machine - Google Patents

Abstract

A door striker of a driving chamber for a heavy construction machine is provided to cut down the manufacturing cost and to decrease the shock and vibration generated when opening and closing the door of the driving chamber. A door striker of a driving chamber for a heavy construction machine comprises a loader(21) and a buffering cover(24). The loader is projected on the both end portions of a sliding door(3) and collides with one side of a side wall member(2c) when the door is fully opened. The buffering cover is inserted into the front end portion of the loader to absorb the shock of the door.

Description

Cab door striker for heavy construction equipment {Door Striker for Heavy Construntion Machine}

1 is a schematic perspective view of a conventional heavy construction equipment,

2 is a perspective view of a cab for heavy construction equipment according to the prior art,

3 is a side view of the sliding door shown in FIG.

4 (a) is a sectional view taken along the line S-S shown in FIG. 2, showing a fully closed position of the sliding door;

4 (b) is a sectional view taken along the line T-T shown in FIG. 2, in a fully open position of the sliding door,

5 is an exploded perspective view of a striker according to the present invention;

6 is a cross-sectional view of a state coupled to one side end of the door according to an embodiment of the present invention,

Figure 7 is a perspective view of the cab showing the use state coupled to the top and bottom of the door according to an embodiment of the present invention,

8 is a cross-sectional view taken along the line X-X shown in FIG. 7 showing the fully open position of the door;

Explanation of the main symbols for the main parts of the drawings

1: upper frame

2: cab

2c: side wall member

3: door

4,5,6: Rail

7,8,9: roller

21: loader

23: loosening protection

24: buffer cover

The present invention relates to a cab door striker for heavy equipment, and more particularly, to improve the structure of the striker to reduce the manufacturing cost while absorbing and buffering the shock and vibration generated during the opening and closing of the cab door cab for construction equipment Relates to a door striker.

In general, heavy equipment for construction such as a hydraulic excavator has been very useful for civil engineering or construction work for a large area by constructing a boom work machine equipped with a cab and a bucket in the upper pivot.

However, in a narrow and limited working environment, especially in urban areas, the engine room installed in the rear of the machine collides with the surrounding objects or the cab door is opened during the opening / closing process. There is a problem with it.

In order to solve this problem, the small swing equipment was developed to perform the operation while keeping the rotation radius of the cab and the turning table small, so that the outer surface and the door of the cab are outward so as to secure enough internal space in the cab structure side. It has been proposed to have a curved or curved arc shape.

Such a conventional heavy construction equipment, in particular, small swing equipment is typically installed in the lower portion of the upper frame 1, the traveling body 103, as shown in Figure 1 to 4, the upper part of the upper cab cab A work device including a bucket 101, a boom 102, and the like operated through an operating lever installed in (2) is configured, and the door 3 is formed in a constant radius on the outer wall 2c of the cab 2 and slides. It is usually installed to open and close while moving.

In particular, the conventional cab 2 includes a plurality of rails 4, 5, 6 formed on the outer wall 2c;

Mounted on the door 3 and always connected to each of the rails 4, 5, 6 so that the door 3 is between a closed position where the doorway 2b is closed and an open position where the doorway 2b is opened. A plurality of rollers (7, 8, 9) for supporting the door (3) when sliding in the;

Each striker pair includes a female striker (10, 12) and a male striker (11, 13), one of each striker pair being installed in the door (3) and the other in the outer wall (2c). At least one pair is coupled to each other when the door 3 is in the closed position and at least one pair is coupled to each other when the door 3 is in the fully open position. Patent Registration No. 5577795).

Here, when the door 3 is in the fully closed position, the arm striker 10 and the arm striker 10 provided at the door engaging portion bent inward from both left and right sides of the outer wall 2c which partitions the doorway 2b. Male strikers 11 provided at both ends of the door 3 are coupled in pairs of male and female (see FIG. 4A).

On the other hand, when the door 3 is in the fully open position, the female striker 12 disposed on one side of the door engaging portion and the male striker 13 protruding into the door 3 are paired on the outer wall 2c. At the same time, the male striker 15 fixed to the bracket 15a and the female striker 14 provided at one end of the door 3 are male and female on the outer wall 2c at a position far from the entrance 2b. The structure is coupled to a pair (see Fig. 4b).

Therefore, when manufacturing the door 3, the impact load and structure of the male striker 13 should be appropriately designed on one side of the door 3 in consideration of the fully open position of the door, and at the same time on the other side of the door 3 Since a suitable coupling position must be separately designed to buffer the impact load of the male striker 15 of the female striker 14, it is difficult to manufacture the design and there is a problem of increasing the manufacturing cost.

In particular, the arm striker 14 provided on the other side of the door 3 is prone to breakage and deformation in the event of a collision with the male striker 15 provided on the outer side wall 2c repeatedly for a long time, and if deformed, When the male and female coupling positions of the strikers 14 and 15 are displaced or inaccurate in the open position, the male strikers 15 may be damaged, thereby causing a problem that the shock of the door may not be fully buffered.

It is an object of the present invention to provide a cab door anti-shock striker for heavy construction equipment that can efficiently reduce the occurrence of shock and vibration in the fully open position of the door.

Another object of the present invention is to improve the structure of the striker to provide a cab door anti-shock striker for heavy construction equipment that can cushion the impact and vibration of the door while reducing the manufacturing cost without the need for an arm striker separately.

The above object of the present invention,

A side wall member on which an entrance is formed;

An upper rail, a central rail and a lower rail formed on upper, middle and lower portions of the side wall member, respectively;

A sliding door slidingly opened and closed by an upper roller, a central roller, and a lower roller coupled to the upper rail, the central rail and the lower rail to open and close an entrance. A cab door striker for heavy equipment that cushions shock when open and fully closed,

Protruding from both ends of the door to the loader at one side of the side wall member in the fully open position of the door, and a shock absorbing cover fitted to the tip of the loader to absorb the impact of the door; By providing a cab door striker.

In addition, the shock absorbing cover is achieved by providing a cab door striker for heavy equipment, characterized in that detachably installed on the front end of the loader.

In addition, it is achieved by providing a cab door striker for heavy construction equipment, characterized in that the release prevention device is installed on one side of the outer peripheral edge of the loader.

In addition, the shock absorbing cover is achieved by providing a cab door striker for heavy construction equipment formed of rubber material.

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.

Figure 5 is an exploded perspective view of the striker according to the present invention, Figure 6 is a cross-sectional view of a state coupled to one end of the door according to an embodiment of the present invention, Figure 7 is an upper portion of the door according to an embodiment of the present invention and 8 is a perspective view of the cab showing a use state coupled to the lower portion, and FIG. 8 is a cross-sectional view taken along the line XX of FIG. 7 showing the fully open position of the door.

Striker 20 of the cab door for heavy equipment according to the invention is

A side wall member 2c in which the doorway 2b is formed;

Upper rails (4), central rails (5) and lower rails (6) formed on the upper, middle and lower portions of the side wall member (2c), respectively;

A sliding door slidingly opened and closed by an upper roller 7, a central roller 8, and a lower roller 9 coupled to the upper rail 4, the central rail 5, and the lower rail 6 ( 3); installed in the cab (2) for construction equipment comprising a, the cab door striker for heavy equipment for construction to cushion the impact when the door (3) is slidingly moved to the fully open and closed position,

The loader 21 protrudes from both end portions 3a and 3b of the door 3 and collides with one side of the side wall member 2c at the fully open position of the door 3, and the tip portion of the loader 21 21a) is inserted into the buffer cover 24 for absorbing the impact of the door (3); and comprises.

Preferably, the insertion holes 22 are formed by tapping at both end portions 3a and 3b of the door 3, respectively, and the loaders 21a and 21b are respectively provided with heads 27 on both sides in the longitudinal direction. A coupling portion 21c is provided, wherein the head portion 27 is formed with an inclined surface 27b, and the coupling portion 21c is formed with a thread extending from an end portion of the body corresponding to the insertion hole 22. Thus, the head portion 21a is coupled to protrude outward from the insertion hole 22 by a predetermined interval.

The buffer cover 24 is detachably installed on the head portion 27 of the loaders 21a and 21b.

Preferably, the shock absorbing cover 23 is formed of a dustproof material such as rubber so as to easily absorb shock, and the recess 26 is provided therein, the head portion 27 is inserted, the outer side of the head portion A locking step 25 is formed to prevent the departure from the 21a.

In addition, at one side of the outer circumference of the loader (21a, 21b), the release preventing tool 23 is installed so that the fastening of the insertion hole 22 and the coupling portion 21c is not released.

The striker 20 according to the present invention is composed of a plurality of strikers 20 at each of the upper and lower sides at both end portions of the door 3 in the fully open position of the door, thereby inserting the loaders 21a and 21b respectively into the insertion holes 22. And a bracket 30 which collides with the plurality of loaders 21 on one side of the side wall member 2c, and a buffer cover on the head portion 27 provided on each of the loaders 21a and 21b. (24) is detachably installed.

In another embodiment of the present invention, the loaders 21a and 21b are fixed to the insertion holes 22 by configuring a plurality of strikers 20 at the centers at both ends of the door 3 in the fully open position of the door, respectively. One side of the side wall member 2c is provided with a bracket 30 which collides with the plurality of loaders 21, and the buffer cover 24 is attached to and detached from the heads 27 provided in the respective loaders 21. Of course it can be installed.

Hereinafter, the effect of the cab door striker for heavy construction equipment together with the embodiment of the present invention will be described.

As shown in FIG. 8, in the cab door opening process, the door 3 is driven by the upper, middle, and lower rails 4, 5, 6, and the rollers 7, 8, 9 provided in the side wall member 2c. By sliding the door away from the doorway (2b), that is, the fully open position of the door.

First, each striker 20a, 20b provided at both ends of the door 3 in the fully open position of the door 3 hits directly on the side wall member 2c through the buffer cover 24.

That is, the striker 20a installed on one side of the door 3 directly hits the side wall member 2c through the buffer cover 24 without an arm striker, and the striker 20b installed on the other side of the door 3 has a side wall. The bracket 30 is fixed to one side of the member 2c through the buffer cover 24.

At this time, the shock absorbing cover 24 coupled to the heads 27 of the loaders 21a and 21b absorbs and cushions the impact load of the door 3 transmitted through the heads 27 of the loaders 21. To act.

If the contact surface 24a of the shock absorbing cover 24 is worn out or used for long periods of repair, the driver should peel off and replace the latching jaw 25 supporting the head 27 of the loader 21a, 21b. It is possible.

In addition, when the collision distance with respect to the bracket 30 fixed to the closed position of the door 3 formed on the doorway 2b or the side wall member 2c is to be reset, the release prevention tool 23 is rotated and inserted. The protruding length or insertion depth of the loaders 21a and 21b coupled to the holes 22 may be readjusted.

Subsequently, the driver may reversely rotate the release lock 23 again so that the protruding length readjustment state of the loader 21 is fixed.

As described above, the striker 20 according to the present invention has a structure in direct contact with the side wall member 2c to absorb and cushion the impact of the door 3.

This means that there is no breakage or deformation of the arm striker applied to the striker when the door 3 collides in the fully open position of the door 3, so that the door does not shake or flow, and the open position is always kept constant. do.

In the configuration of the present invention, even if there are a plurality of steps provided in the loader and the head constituting the striker and a plurality of holes formed in the shock absorbing cover to facilitate shock and vibration absorption in the opening and closing process of the door, this is the It should be interpreted as being included in the technical category.

As described above, the cab door anti-shock striker for heavy equipment according to the present invention can directly absorb and cushion the impact of the door without the need to separately configure the arm striker on the door or side wall member, thereby significantly reducing the manufacturing cost There is an advantage that the effect is very excellent, such as preventing the flow or shaking of the door.

Claims (5)

A side wall member on which an entrance is formed; An upper rail, a central rail and a lower rail formed on upper, middle and lower portions of the side wall member, respectively; A sliding door slidingly opened and closed by an upper roller, a central roller, and a lower roller coupled to the upper rail, the central rail and the lower rail to open and close an entrance. A cab door striker for heavy equipment that cushions shock when open and fully closed, Protruding from both ends of the door to the loader at one side of the side wall member in the fully open position of the door, and a shock absorbing cover fitted to the tip of the loader to absorb the impact of the door; Cab door striker. The method according to claim 1, Cab door striker for heavy equipment, characterized in that the shock absorbing cover is detachably installed on the front end of the loader. The method according to claim 1, Cab door striker for heavy construction equipment, characterized in that the loosening prevention is installed on one side of the outer peripheral edge of the loader. The method according to claim 1 or 2, The shock absorbing cover has a locking projection protruding inward on one side of the body, the cab door striker for construction equipment, characterized in that formed of rubber material. A side wall member on which an entrance is formed; An upper rail, a central rail and a lower rail formed on upper, middle and lower portions of the side wall member, respectively; A sliding door slidingly opened and closed by an upper roller, a central roller, and a lower roller coupled to the upper rail, the central rail and the lower rail to open and close an entrance. A cab door striker for heavy equipment that cushions shock when open and fully closed, A plurality of strikers are configured at one side of the upper, lower, or central portion of the door at the fully open position of the door, and the loader of the striker has a buffer cover detachably attached to the cab door striker for construction equipment.

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