JP3160167B2 - Traveling width converter for self-propelled vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling width converter for a traveling vehicle such as a crawler crane or the like, for example, a traveling vehicle such as a caterpillar.

[0002]

2. Description of the Related Art An example of this type of apparatus is disclosed in Japanese Utility Model Laid-Open Publication No. 6-10.
No. 66 is disclosed. This is because one end of a small-diameter cylindrical body is fixed to one of the pair of traveling support frames that support a traveling drive member such as a caterpillar so that the traveling drive member can travel freely, and the medium traveling diameter is attached to the other traveling support frame. One end of the cylindrical body is fixed, the other end of the small-diameter cylindrical body and the other end of the medium-diameter cylindrical body are elastically fitted to each other, and the large-diameter cylinder externally movably fitted to the medium-diameter cylindrical body in the axial direction. A body is fixed to the vehicle body, and a fastening means for detachably securing both of the two traveling support frames is provided between the one traveling support frame and the vehicle body, A hydraulic cylinder is provided between the other traveling support frame and the vehicle body, and by driving the hydraulic cylinder to expand and contract, the small-diameter cylinder and the medium-diameter cylinder expand and contract with each other, After setting the traveling width between the traveling driving members to be narrow or wide, the small-diameter cylindrical body And the medium-diameter tubular body by locking bolts and nuts, so as to lock the traveling width set to narrow or wide.

[0003]

In the above-mentioned conventional apparatus,
To lock the running width set to narrow or wide,
It is necessary to fix the small-diameter cylinder and the medium-diameter cylinder manually with bolts and nuts, and lock the small-diameter cylinder and the medium-diameter cylinder so that they cannot expand and contract. And the work efficiency is low.

The present invention has been made in consideration of the above-described conventional problems, and has as its object to provide a traveling width conversion device for a self-propelled vehicle that can securely lock a traveling width set to a narrow width or a wide width by a simple operation. I have.

[0005]

When A in order to achieve the means] in order to achieve the above object the construction of the present invention will be described with reference to the accompanying drawings corresponding to embodiments, the invention of claim 1, wherein the caterpillar (registered trademark
Target) traveling drive member 1a such, the pair of running support frame 2a which supports 1b a freely running each of 2b, the one end portion of the small-diameter cylindrical member 9 is fixed to the traveling support frame 2a of the one and the other of One end of the medium-diameter cylindrical body 10 is fixed to the traveling support frame 2b, and the other end of the small-diameter cylindrical body 9 and the other end of the medium-diameter cylindrical body 10 are fitted to each other so as to be expandable and contractable. A large-diameter cylindrical body 11 which is fitted to the outside so as to be movable in the direction is fixed to the vehicle body 3, and between the one of the two traveling support frames 2 a and 2 b and the vehicle body 3. 2a, 3
A fastening means 5 for detachably fastening is provided,
A hydraulic cylinder 6 is provided between the other traveling support frame 2b and the vehicle body 3, and by driving the hydraulic cylinder 6 to expand and contract, the small-diameter cylindrical body 9 and the medium-diameter cylindrical body 10 are mutually connected. By extending and contracting, the traveling width L between the traveling driving members 1a and 1b can be set to a narrow width and a wide width. A locking cylinder 15 that fits into the medium-diameter cylinder 10 movably in the axial direction in the fitted state, and a lock driving unit 16 for rotating and driving the locking cylinder 15 are provided.
In the contracted state and the extended state of the small-diameter cylindrical body 9 and the medium-diameter cylindrical body 10, the locking driving unit 16 locks the locking cylindrical body 1.
5 the locking device 17 for locking the disabling stretching the small-diameter cylindrical member 9 and the medium-diameter cylindrical member 10 by a predetermined angle is provided, said locking driving means 16 the two travel support
Arranged between one of the frames 2a, 2b and the locking cylinder 15.
The locking device 17 includes a plurality of circumferentially extending annular grooves 23a, 23b formed in the inner peripheral surface of the intermediate diameter cylindrical body 10 at predetermined intervals in the axial direction and in parallel with each other. A locking groove 23 formed of a communication groove 23c extending in the axial direction for communicating the annular grooves 23a and 23b with each other. And a lock piece 24 to be used.

[0006]

[0007]

[0008]

According to the first aspect of the present invention, when the traveling path of the construction site is narrow, when there is an obstacle on the way, or when the self-propelled vehicle is loaded on a carrier and transported to another construction site. Of the pair of traveling support frames 2a and 2b which support the traveling drive members 1a and 1b such as caterpillars, respectively, so that one of the traveling support frames 2a and the self-propelled vehicle body 3 are stopped by the fastening means 5. In a state of being worn, a hydraulic cylinder 6 provided between the other traveling support frame 2b and the vehicle body 3
Is brought into a contracted state so that the traveling drive member 1b supported by the other traveling support frame 2b is pulled inward, and then the locking drive means 16 is used to lock the cylinder 15 for locking.
May be rotated by a predetermined angle. As a result, the small-diameter cylinder 9 and the medium-diameter cylinder 10 are locked by the locking device 17 so that they cannot expand and contract, and the traveling width L between the traveling driving members 1a and 1b is set to be kept narrow (see FIG. 1 and FIG. 1). 2),
The self-propelled vehicle can be easily moved.

Further, when heavy load construction work is performed by a construction machine provided on the self-propelled vehicle main body 3, the lock device 17 is required.
When the hydraulic cylinder 6 is extended and driven in a state where the lock is released, the travel drive member 1b supported by the other travel support frame 2b is pushed out, and then the lock drive means 16 is used for locking. What is necessary is just to rotate the cylinder 15 by a predetermined angle. As a result, the small-diameter cylindrical body 9 and the medium-diameter cylindrical body 10 are locked by the locking device 17 so as not to expand and contract, so that the traveling width L between the traveling driving members 1a and 1b is set to be wide and maintained, and 3 is biased toward one traveling drive member 1a, and an interval H from the center of the self-propelled vehicle body 3 to a fall point P passing through the center of the other traveling drive member 1b.
Since 1 can be made large (see FIGS. 6 and 7), there is no possibility that the self-propelled vehicle will roll over during the construction work.

Further, when a general construction work is performed by a construction machine provided on the self-propelled vehicle body 3, when the traveling width L is set to be wide as described above, the fastening means is used. 5, the hydraulic cylinder 6 is contracted to release the self-propelled vehicle body 3 from the two traveling drive members 1.
What is necessary is just to move to the intermediate position between a and 1b. Thereby, the self-propelled vehicle body 3 is stably supported at a position intermediate between the two traveling drive members 1a and 1b in a state where the traveling width L is widened (see FIGS. 8 and 9). The construction work can be performed under the same conditions that are stable over the entire circumference of the vehicle body 3. Further, the construction work can be performed by biasing the vehicle body 3 toward the other traveling drive member 1b (see FIGS. 10 and 11).

In this case, the small-diameter cylinder 9 and the medium-diameter cylinder 10 are locked by the locking device 17 so that they cannot be expanded or contracted simply by rotating the locking cylinder 15 by a predetermined angle by the locking driving means 16. The traveling width L set to be wide can be reliably held (see FIG. 5).

According to the first aspect of the present invention, the small-diameter cylindrical body 9 and the medium-diameter cylindrical body 10 are locked inextensibly by merely moving the lock piece 24 from the communication groove 23c to the annular grooves 23a and 23b. And the lock piece 2
The lock can be released only by moving the groove 4 from the annular grooves 23a and 23b to the communication groove 23c, and the operation of locking and unlocking can be performed extremely easily. Furthermore, if the lock driving means 16 is a hydraulic cylinder 22
Use the hydraulic equipment installed in the self-propelled vehicle.
It can be driven by using, and the production cost is low.

[0013]

[0014]

1 and 2 show a traveling vehicle 1a, 1b, such as a caterpillar, for moving a construction machine such as a crawler crane having a traveling width conversion device according to an embodiment of the present invention. Are provided between a pair of traveling support frames 2a and 2b for supporting the vehicle in a freely movable manner, respectively, and a pair of three overlapping cylinder frames 4 and 4 for supporting the self-propelled vehicle body 3 are provided. 3 and fastening means 5 and 5 for detachably fastening the two 2a and 3 to each other, and a hydraulic cylinder 6 between the other traveling support frame 2b and the vehicle body 3. And the construction machine 7
Are disposed so as to be freely rotatable.

As shown in FIGS. 1 and 3, the tri-polymerized cylindrical frames 4 and 4 have a small-diameter cylindrical body 9 having one end fixed to one traveling support frame 2a, and one end having the other traveling support frame. 2b
And a large-diameter cylinder 11 fixed to the motor vehicle body 3. The other ends of the small-diameter cylinder 9 and the medium-diameter cylinder 10 can be extended and contracted with each other. The large-diameter cylinder 11 is fitted to the medium-diameter cylinder 10 so as to be movable in the axial direction, and the traveling width L between the traveling driving members 1a and 1b can be adjusted to be narrow and wide. I can do it.

As shown in FIG. 2, the fixing means 5 and 5 are fixed to one traveling support frame 2a and extend in parallel with the three-polymer tube frames 4 and 4, and the fixing rod 5a. A fixing piece 5b fixed to the large-diameter cylindrical body 11 opposite to 5a, and both of the fixing pieces 5a, 5b through a through hole 13 formed in the tip of the fixing rod 5a and the fixing piece 5b. And a bolt / nut 5c for integrally connecting the two with each other. As shown in FIG.
By driving the hydraulic cylinder 6 to extend from a state where is set to a small width, the other traveling drive member 1b can be pushed outward to convert the traveling width L to a wide width (see FIG. 7). By contracting and driving the hydraulic cylinder 6 from the state in which the travel width L is set to be wide, the other travel drive member 1b can be drawn inward to convert the travel width L to a narrow width (see FIG. 2). .

A check valve (not shown) with a pilot is interposed in the hydraulic circuit of the hydraulic cylinder 6 to bring the hydraulic cylinder 6 into a desired expansion / contraction state between the most contracted state and the most extended state. Thereafter, when the supply of the pressure oil from the hydraulic pump to the hydraulic cylinder 6 is stopped, the check valve with the pilot is automatically operated, so that the hydraulic cylinder 6 can be locked so as not to expand and contract.

As shown in FIG. 1 to FIG.
A lock driving means 16 for reciprocatingly rotating the lock cylinder 15 by a predetermined angle α (45 ° in this embodiment) is provided on the lock cylinder 15.
A lock device 17 is provided between the cylinder 5 and the medium-diameter cylindrical body 10.

As shown in FIG. 1, the length of the locking cylinder 15 is set slightly shorter than the length of the small-diameter cylinder 9, and the locking driving means 16 and the outer periphery of the other end of the small-diameter cylinder 9 are provided. It is sandwiched between the flanges 18 integrally projecting from the surface, and is fitted on the small-diameter cylinder 9 so as to be axially movably fitted in the medium-diameter cylinder 10 in a state in which it cannot be moved in the axial direction but is rotatably fitted outside. Have been.

As shown in FIGS. 2 and 4, the lock driving means 16 includes a support rod 20 protruding from one of the traveling support frames 2a and an arm 2 protruding from one end of the lock cylinder 15.
The lock cylinder 15 is reciprocated at a predetermined angle α by driving the hydraulic cylinder 22 to expand and contract.

As shown in FIGS. 3 and 5, the lock device 17 includes a plurality of circumferentially extending annular grooves formed in the inner peripheral surface of the middle diameter cylindrical body 10 at a predetermined interval β in the axial direction. The locking groove 23 includes a pair of communication grooves 23c extending in the axial direction for connecting the annular grooves 23a and 23b and the respective annular grooves 23a and 23b to each other. And a pair of lock pieces 24 movably fitted therein, and the lock pieces 24 are
The small-diameter cylinder 9 and the medium-diameter cylinder 10 are moved at a predetermined interval β by driving the hydraulic cylinder 6 to expand and contract while the hydraulic cylinder 6 is fitted in the cylinder c.
In the most contracted state and the most extended state, the locking driving means 16 can be used to expand and contract the locking cylinder 1.
5 is rotated by a predetermined angle α, the lock pieces 24 are fitted into the annular grooves 23a and 23b (see FIG. 5), and the small-diameter cylindrical body 9 and the medium-diameter cylindrical body 10 can be locked so as to be inextensible.

The procedure for changing the travel width L will be described. When the travel path at the construction site is narrow, when there is an obstacle on the way, or when the self-propelled vehicle is loaded on the transport vehicle and the other 1 and 2, the hydraulic cylinder 6 is driven to contract while the traveling support frame 2a and the vehicle body 3 are fastened by the fastening means 5 and 5, as shown in FIGS. Then, after the other traveling drive member 1b is pulled inward, the lock driving means 16 may rotate the lock cylinder 15 by a predetermined angle α. by this,
The lock piece 24 of the lock device 17 is fitted into the annular groove 23a (see FIG. 5), and the small-diameter cylinder 9 and the medium-diameter cylinder 10 are locked so as not to expand and contract, and the traveling width L between the traveling driving members 1a and 1b. Is set to be kept narrow, so that the self-propelled vehicle can be easily moved.

The construction machine 7 provided on the vehicle body 3
6 and 7 when performing heavy load construction work
As shown in FIG. 7, the other travel drive member 1b is pushed outward by extending the hydraulic cylinder 6 in a state where the lock by the lock device 17 is released, and then the lock cylinder 15 is May be rotated by a predetermined angle α. As a result, the lock piece 24 of the lock device 17 is fitted into the annular groove 23b (see FIG. 5), and the small-diameter cylindrical body 9 and the medium-diameter cylindrical body 10 are locked so that they cannot expand and contract. The traveling width L is set to be wide and held, and the self-propelled vehicle body 3 is biased toward the one traveling drive member 1a, and the falling point P passes from the center O of the self-propelled vehicle body 3 to the center of the other traveling drive member 1b. Since the distance H1 to the vehicle can be made large, there is no possibility that the self-propelled vehicle will roll over during the construction work.

Further, when a general construction work is performed by a construction machine provided on the main body of the self-propelled vehicle, as shown in FIGS. 8 and 9, the traveling width L is set and held wide. ,
After the fastening by the fastening means 5 and 5 is released, the self-propelled vehicle body 3 may be moved to an intermediate position between the two traveling driving members 1a and 1b by contracting and driving the hydraulic cylinder 6. As a result, the distance H from the center O of the self-propelled vehicle body 3 to the overturning point P passing through the centers of the two traveling drive members 1a and 1b.
1 and H2 become equal (H1 = H2), and the self-propelled vehicle body 3 is stably supported at a position between the two traveling drive members 1a and 1b in a state where the traveling width L is widened. Car body 3
Construction work can be performed under stable conditions around the entire circumference.

Further, as shown in FIG. 10 and FIG. 11, the construction work can be performed by biasing the self-propelled vehicle body 3 toward the other traveling drive member 1b.

[0026]

According to the first aspect of the present invention, the small-diameter cylinder and the medium-diameter cylinder are locked inextensibly by the locking device only by rotating the locking cylinder by the predetermined angle by the locking driving means. Therefore, the traveling width set to be narrow or wide can be reliably held. In addition, since a complicated manual operation is hardly required, the locking operation can be performed quickly and easily.

According to the first aspect of the present invention, the small-diameter cylindrical body and the medium-diameter cylindrical body can be locked inextensibly by simply moving the lock piece from the communication groove to the annular groove, and the lock is achieved. The lock can be released only by moving the piece from the annular groove to the communication groove, and the operation of locking and unlocking can be performed extremely easily, and the configuration is simple. Further, the lock driving means is
Oil that is mounted on a self-propelled vehicle because it consists of cylinders
It can be driven using pressure equipment, and the production cost is low.
Good .

[0028]

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a self-propelled vehicle provided with a traveling width conversion device according to one embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the same.

FIG. 3 is an exploded perspective view of the main part.

FIG. 4 is a cross-sectional view of the self-propelled vehicle.

FIG. 5 is an enlarged cross-sectional view of the main part.

FIG. 6 is a partially cutaway front view showing a state in which the self-propelled vehicle body is biased toward one traveling drive member in a state where the traveling width is widened.

FIG. 7 is a horizontal sectional view of the same.

FIG. 8 is a partially cutaway front view showing a state in which the traveling vehicle body is located at an intermediate position between both traveling driving members with the traveling width widened.

FIG. 9 is a horizontal sectional view of the same.

FIG. 10 is a partially cutaway front view showing a state in which the self-propelled vehicle body is biased toward the other traveling drive member with the traveling width widened.

FIG. 11 is a horizontal sectional view of the same.

[Explanation of symbols]

 1a Travel drive member 1b Travel drive member 2a One travel support frame 2b The other travel support frame 3 Self-propelled vehicle main body 5 Fastening means 6 Hydraulic cylinder 9 Small diameter cylinder 10 Medium diameter cylinder 11 Large diameter cylinder 15 Lock cylinder Body 16 Locking driving means 17 Lock device 22 Hydraulic cylinder 23 Lock groove 23a Annular groove 23b Annular groove 23c Communication groove 24 Lock piece L Traveling width

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-47-7409 (JP, A) JP-A-8-142936 (JP, A) JP-A-5-85426 (JP, A) 1066 (JP, U) JP-A 60-142169 (JP, U) JP-A 4-129391 (JP, U) JP-A 5-86772 (JP, U) Jiko 47-20729 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 55/084 B62D 55/10

Claims (1)

(57) [Claims] An end of a small-diameter cylindrical body is fixed to one of a pair of traveling support frames for supporting a traveling drive member such as a caterpillar (registered trademark) so as to freely travel, and the other of the traveling support frames is supported by one of the traveling support members. One end of the medium-diameter cylinder is fixed to the traveling support frame, and the other ends of the small-diameter cylinder and the medium-diameter cylinder are fitted to each other so as to be extendable and contractable, and are axially movable on the medium-diameter cylinder. A large-diameter cylindrical body fitted to the outside of the vehicle is fixed to the vehicle body, and one of the two traveling support frames is detachably secured between one of the vehicle support frames and the vehicle body. Means are provided, and a hydraulic cylinder is provided between the other traveling support frame and the vehicle body. By driving the hydraulic cylinder to expand and contract, the small-diameter cylinder and the medium-diameter cylinder are mutually connected. By expanding and contracting, it is possible to set the traveling width L between the traveling driving members to a narrow width and a wide width. A locking cylinder that is axially movably fitted into the small-diameter cylinder while being axially movably fitted to the small-diameter cylinder in such a manner that the locking cylinder is not movable in the axial direction and is rotatably fitted to the small-diameter cylinder. Lock driving means for rotationally driving is provided, and the lock driving means rotates the locking cylinder by a predetermined angle in the contracted state and the expanded state of the small-diameter cylindrical body and the medium-diameter cylindrical body. locking device is provided for locking the cylindrical body and medium-diameter cylindrical body stretching incapable, before
The lock driving means is provided for locking one of the two traveling support frames with the lock.
It consists of a hydraulic cylinder arranged between
The locking device includes a plurality of circumferentially extending annular grooves formed in the inner peripheral surface of the medium-diameter cylindrical body in parallel at predetermined intervals in the axial direction, and a communication groove extending in the axial direction for communicating the annular grooves with each other. And a lock piece protruding from an outer peripheral surface of the lock cylinder and movably fitted into the lock groove.