JPH1029570A - Track width changeover device for self-advancing vehicle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change over the position of the crawler means of a self-advancing vehicle body within a range from its outermost expanded position to its innermost retracted position from the outside thereof. SOLUTION: A track width changeover device for a self-advancing vehicle body includes crawler means 20 supported on a chassis 12 of a self-advancing vehicle body 10 at both sides thereof movably in the width direction of the self-advancing vehicle body, and hydraulic cylinder devices 40 pivotally coupling the crawler means 20 to the chassis 12 respectively, to thereby change over the tread of the self-advancing vehicle body 10 through the expansion or compression in the hydraulic cylinder devices 40. The hydraulic cylinder devices 40 are pivotally coupled at their one ends to the chassis 12 and at their other ends respectively to the base ends of track width changeover levers 32 passing through the respective crawler means 20 movably in the width direction thereof. The free ends of the track width-changeover levers 32 are exposed to the outside through the crawler means 20. The crawler means 20 are provided at their outsides with fixing means 34, which are adapted to engage or disengage the respective free ends of the track width-changeover levers 32 with or from the crawler means 20. The fixing means 34 can lock the respective track width-changeover levers 32 at their plural different positions in the width direction of the crawler means 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for changing a traveling width of a self-propelled vehicle body provided in a foundation construction machine or the like.

[0002]

2. Description of the Related Art Self-propelled crawler cranes, pile driving machines,
A caterpillar-type traveling means is often used for traveling of a foundation construction machine such as an excavator. When the travel path at the work site is narrow, when there is an obstacle on the way, or when the foundation construction machine is loaded on a transport vehicle and transported, etc., make the travel width as narrow as possible. It is desired. On the other hand, at the time of work, it is desired to make the running width as wide as possible to more stably support the foundation construction machine.

Conventionally, as a traveling width switching device for a self-propelled vehicle body, support pieces are provided on both sides of a base of the self-propelled vehicle body, and a traveling means is slidably fitted to the support piece, as shown in FIG. A self-propelled vehicle body (81) and a traveling means (82) are connected by a hydraulic cylinder device (83). In this method, the traveling width is switched by extending and contracting the hydraulic cylinder device (83) to slide the traveling means (82) in the width direction of the self-propelled body (81). However, depending on the conditions of use of the foundation construction machine, the amount of protrusion of the traveling means to the outside may be small, so if it is desired to take a large amount of inward drawing, or the amount of inward drawing may be small. In some cases, it may be necessary to increase the amount of outward projection.

[0004] Therefore, the applicant has filed Japanese Utility Model No. 6-30622.
No. 2, there is proposed a traveling width switching device as shown in FIG. The device pivotally supports the base end of the traveling width switching rod (92) inside the frame (91) of the traveling means (90), and connects the vicinity of the distal end of the switching rod (92) to the hydraulic cylinder device (93). And running width switching rod (92)
The tip is swingable in the width direction. In order to fix the switching rod (92) and the traveling means (90), a fixing hole (94) is formed at the tip of the switching rod (92), and the frame (91) has two holes at different positions. One positioning hole (95) (95a) is opened, and the fixing hole (94) can be connected to one of the positioning holes (95) (95a) by a fixing pin (96). I have. Switching rod
When the (92) is connected to the inner positioning hole (95a), it is possible to increase the amount of protrusion of the traveling means (90) to the outside, and to connect the switching rod (92) to the outer positioning hole (95). When it is connected to the traveling means, a large amount of pulling into the traveling means (90) can be obtained.

[0005]

Since the positioning hole of the frame is provided inside the traveling means, the operator must go under the self-propelled vehicle body to change the fixed position of the switching rod. After pulling out the fixing pin and changing the fixing position,
It is necessary to re-insert the fixing pin, which is inconvenient and troublesome.

It is an object of the present invention to provide a traveling width switching device capable of switching the maximum amount of extension of a traveling means of a self-propelled vehicle body to the outside and the maximum amount of retraction to the inside from outside the traveling means. .

[0007]

In order to solve the above-mentioned problems, the present invention provides an endless track type traveling means (20) provided on both sides of a pedestal (12) of a self-propelled body (10). The pedestal (12) is supported on the pedestal (12) so as to be movable in the width direction of the vehicle body, and the pedestal (12) and the traveling means (20) are pivotally connected by a hydraulic cylinder device (40), and a hydraulic cylinder device (40) In the traveling width switching device of the self-propelled vehicle body in which the traveling width of the self-propelled vehicle body (10) can be changed by the telescopic operation of
One end of the hydraulic cylinder device (40) is pivotally connected to the pedestal (10), and the other end is pivotally connected to the base end of a running width switching rod (32) that movably penetrates the running means (20) in the width direction. The free end of the traveling width switching rod (32) is exposed outside the traveling means (20), and the free end of the traveling width switching rod (32) and the traveling means are outside the traveling means (20). (20) and a fixing means (34) which can be attached to and detached from the traveling means (2).
It can be fixed at a plurality of different positions in the width direction of 0).

[0008]

[Operation and Effect] When changing the traveling width of the self-propelled vehicle body (10) so that the maximum overhang amount is larger than the inward retraction amount, the traveling means (20) and the traveling width are required. Fixing means (34) provided with a plurality of free ends of the switching rod (32)
Of these, it is fixed to the fixing means (34) located inside. In this state, when the hydraulic cylinder device (40) is extended, the traveling means (2
The maximum overhang of 0) can be further extended outward. In addition, when the traveling width of the self-propelled vehicle body (10) is set to be larger than the amount of extension to the outside, the maximum amount of inward retraction is required, the traveling means (20) and the traveling width switching rod (32) are free. The end is fixed to an outer fixing means (34) of a plurality of fixing means (34). In this state, when the hydraulic cylinder device (40) is contracted, the maximum retraction amount of the traveling means (20) can be further reduced inward.

According to the present invention, the traveling width switching rod (32) and the traveling means (20) can be fixed and aligned from the outside of the traveling means (20). Since there is no need to go under the floor of the vehicle body (10), the work is easy and the running width can be easily and efficiently switched. In addition, since the traveling width switching rod (32) and the fixing means (34) are outside the vehicle body (10), it is possible to work while looking from the outside, and further, at which position the traveling width switching rod (32) is fixed Can be easily known.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the traveling width switching device (30) of the present invention is applied to a caterpillar driven foundation construction machine (11) will be described. In the following description, a direction orthogonal to the traveling direction of the self-propelled vehicle body (10) in a horizontal plane is referred to as a “width direction” or a “lateral direction”.

In this embodiment, as will be described later, the fixing means (34) includes a fixing hole (38) penetratingly opened at the free end of the running width switching rod (32) and a frame (22) to be described later. , Which are removably inserted into the positioning holes (36) (36a) of the positioning protrusions (35) protruding from the fixing holes (36) and any of the positioning holes (36) (36a). Consists of fixing pins (39).

As shown in FIG. 1, a foundation work construction machine (11) includes working equipment such as a driver's seat, a leader, an earth auger, a crane, a hammer, hydraulic equipment, etc. on a self-propelled body (10). A known workbench (19) equipped with
It is configured to be supported rotatable by degrees.

The self-propelled vehicle body (10) has a pedestal (1) as shown in FIG.
2) and running means (20) arranged on both sides of the pedestal (12). On the upper surface of the pedestal (12), a mounting portion (13) for the worktable (19) is formed in an annular shape. Supporting pieces (14) (14) for slidably fitting the traveling means (20) are provided in the front and rear portions on both sides of the pedestal (12), respectively, in the width direction. At substantially the center of the lower surface of the pedestal (12), two brackets (16) and (16) are arranged side by side in the width direction, and each bracket (16)
Is a hydraulic cylinder device that slides the traveling means (20)
(40) is pivotably supported in the plane in the width direction.

The hydraulic cylinder device (40) includes a piston rod
The tip of (42) is pivotally supported by the bracket (16),
The end of (43) is pivotally supported by a running width switching rod (32) to be described later, and expands and contracts by an oil supply / discharge device (not shown) such as a pump.

[0015] Caterpillar-type traveling means (20) are provided on the left and right sides of the pedestal (12), respectively. Hereinafter, only the mechanism on the right side (lower side in FIG. 2) of the self-propelled vehicle body (10) will be described, but the same mechanism is provided on the left side. As shown in FIG. 1, the traveling means (20) includes a plurality of rollers on a frame (22) extending in the traveling direction.
(23), around the frame (22), and an endless caterpillar (24) is provided in contact with the roller (23). The caterpillar (24) is rotationally driven by a driving device (not shown) in a direction for moving the self-propelled vehicle body (10) forward and backward. As shown in FIGS. 1 and 2, support holes (25) and (25) are formed in the front and rear of the frame (22) so as to penetrate in the width direction.
Support pieces (14) (14) protruding from the front and rear portions of (12) are slidably fitted respectively. At a substantially central position of the frame (22), a central hole (26) penetrating in the width direction is opened, and a rod-like traveling width switching rod (32) is slidably fitted. The travel width switching rod (32) has an end on the pedestal (12) side pivotally supported by a cylinder end of the hydraulic cylinder device (40). Further, a fixing hole (38) for fixing the traveling width switching rod (32) to the frame (22) is formed at a free end of the traveling width switching rod (32) located outside the frame.

Outside the frame (22), from the vicinity of the central hole (26), along the slide transition path of the traveling width switching rod (32),
A positioning projection (35) is provided. Positioning projection
In (35), positioning holes (36) and (36a) are provided one at each of two different positions in the left-right direction, and the positioning holes (36) (36)
a) and the fixing hole (38) can be connected by fitting the fixing pin (39) into the hole after aligning the holes, and the traveling width switching rod (32) is connected to the frame ( 22). When the frame (22) and the traveling width switching rod (32) are fixed, the traveling means (20) and the pedestal (12) are connected to the hydraulic cylinder device (40).
In this state, the hydraulic cylinder device (40)
By expanding and contracting, the traveling means (20) slides in the width direction with respect to the pedestal (12), and the traveling width of the self-propelled vehicle body (10) can be enlarged or reduced.

The switching between the maximum overhang amount and the maximum retraction amount of the traveling width of the self-propelled vehicle body (10) having the above configuration will be described. If you want to increase the maximum overhang,
First, an operator places the fixing pin (3) from outside the traveling means (20).
9), and remove the connection between the traveling width switching rod (32) and the frame (22). Next, the length of the hydraulic cylinder device (40) is adjusted, and the traveling width switching rod (32) is slid inward. When the positioning hole (36a) located inside the positioning protrusion (35) and the fixing hole (38) of the traveling width switching rod (32) are aligned, the holes are fixed with the fixing pin (39). Connect (FIGS. 3 and 2
A). When the hydraulic cylinder device (40) is extended in this state, it is possible to increase the amount of extension to the outside of the traveling width. In addition, when the hydraulic cylinder device (40) is contracted, the amount of retraction into the traveling means (20) is reduced. Since the amount of overhang to the outside of the running width can be increased, the foundation work construction machine (11) at the time of work can be more stably supported.

Next, when it is desired to increase the maximum inward retraction amount, similarly, the fixing pin (39) is pulled out, and the connection between the traveling width switching rod (32) and the frame (22) is disconnected. Next, the length of the hydraulic cylinder device (40) is adjusted,
Slide (32) outward. When the positioning hole (36) located outside the positioning protrusion (35) and the fixing hole (38) of the travel width switching rod (32) are aligned, the holes are fixed with the fixing pin (39). (See FIGS. 4 and 2B). When the hydraulic cylinder device (40) is contracted in this outer state, a large amount of inward drawing of the traveling width can be obtained. In addition, when the hydraulic cylinder device (40) is contracted, the amount of protrusion outside the traveling means (20) is reduced. Since the amount of inward drawing of the running width can be increased, it is easy to move and transport the foundation construction machine (11).

The description of the above embodiments is for the purpose of illustrating the present invention and should not be construed as limiting the invention described in the appended claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

For example, the fixing position of the fixing means (34) is two in the above embodiment. However, by providing a larger number of fixing positions, a finer adjustment of the traveling width may be performed. Further, in the above embodiment, two positioning holes (36) (36a) are formed in the positioning projection (35), but a plurality of fixing holes are provided at different positions in the width direction of the traveling width switching rod (32). A hole may be formed, and one positioning hole may be formed in the positioning projection (35). In this case, when any one of the fixing holes is connected to the positioning hole with the fixing pin (39) and the hydraulic cylinder device (40) is expanded or contracted, the self-propelled vehicle body (10) can be moved in the same manner as described above. The running width can be changed.

Further, the shape of the fixing means (34) is not limited to the above-described embodiment, and for example, the positioning projection may be formed in a cylindrical shape. The hydraulic cylinder device (40) for connecting the pedestal (12) and the travel width switching rod (32) includes a cylinder (43) connected to the pedestal (12).
, The piston rod (42) may be pivotally supported by the travel width switching rod (32).

[Brief description of the drawings]

FIG. 1 is a side view of a foundation construction machine.

FIG. 2 is a partially sectional plan view of a front portion of a self-propelled vehicle body provided with a traveling width switching device of the present invention.

FIG. 3 is a cross-sectional view taken along line XX of FIG. 2, showing a fixed position of a traveling width switching rod when a maximum overhang amount of the traveling means is required.

4 is a sectional view taken along the line XX of FIG. 2 and showing a fixed position of a traveling width switching rod when a maximum retraction amount is required inside the traveling means.

FIG. 5 is a view showing a conventional traveling width switching device.

FIG. 6 is a view showing a conventional traveling width switching device.

[Explanation of symbols]

 (10) Self-propelled body (20) Traveling means (30) Traveling width switching device (32) Traveling width switching rod (34) Fixing means (40) Hydraulic cylinder device

Claims (1)

[Claims] An endless track traveling means (20) provided on both sides of a pedestal (12) of a self-propelled vehicle body (10) is supported on the pedestal (12) so as to be movable in a width direction of the self-propelled vehicle body, The pedestal (12) and the traveling means (20) are pivotally connected by a hydraulic cylinder device (40), and the traveling width of the self-propelled body (10) is changed by the expansion and contraction operation of the hydraulic cylinder device (40). In a possible traveling width switching device for a self-propelled vehicle body, one end of a hydraulic cylinder device (40) is pivotally connected to a pedestal (10), and the other end travels through the traveling means (20) movably in the width direction. The base end of the width switching rod (32) is pivotally connected, and the free end of the traveling width switching rod (32) is exposed outside the traveling means (20), and outside the traveling means (20), A fixing means (34) for detachably attaching the free end of the traveling width switching rod (32) and the traveling means (20) is provided, and the fixing means (34) moves the traveling width switching rod (32) to the traveling means (2
0) A traveling width switching device for a self-propelled vehicle body, which can be fixed at a plurality of different positions in the width direction.