JP2606061B2 - Rotary snowplow equipped with cylinder locking mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary snow plow equipped with a cylinder locking mechanism capable of locking a piston rod in either an extended state or a shortened state.

[0002]

2. Description of the Related Art A rotary snowplow takes in the snow in front of a vehicle into a rotary snowplow while traveling forward and throws snow away. A railway snowplow has a snow removal width in the left-right direction in the traveling direction. In order to spread the wings, wings are provided on the left and right sides, the wings are opened, the side snow is guided into the rotary device of the vehicle, and snow is thrown by a blower. Since the left and right wings extend beyond the vehicle limit, they must be closed during normal running without snow removal. If the wing is opened, it will collide with the utility pole next to the track.In order to avoid this, a lock pin is inserted during normal running, and the wing is fixed in a closed state via the snow removal frame. ing.

[0003]

By the way, the wing is operated to be opened and closed and moved up and down by a hydraulic cylinder. Therefore, it is necessary to set a certain condition when a lock pin for fixing between the snow removal frame and the wing is inserted. In other words, the lock pin can be inserted only at the position where the wing is lowered,
At the position where the wing is raised, the lock member extending from the wing is displaced from the locking position of the snow removal frame, and the lock pin cannot be inserted. Therefore, it has been desired to be able to lock the wing in the closed state regardless of whether the wing is at any of the upper and lower positions.

[0004] The present invention has been made in view of the above circumstances, and can lock the cylinder itself to a certain length.
Aims to wings be at any upper position or the lower position to provide a rotary snow plow with a locking mechanism of the cylinder can be locked in a closed state by using a cylinder of the lock mechanism that.

[0005]

In a rotary snowplow equipped with a cylinder locking mechanism according to the present invention, an elongate member extending in the longitudinal direction of the piston rod is connected to a tip end portion of the piston rod of the cylinder, and is connected to the cylinder body. Is a rotary snow plow equipped with a cylinder locking mechanism having a guide member attached to surround the elongated member and an engagement means provided between the guide member and the elongated member.
The engagement means may be provided with a hole in the elongated member,
A lock pin provided on the guide member so as to be movable forward and backward.
Is inserted, and the cylinder and the long member
One is connected to the snow removal frame and the cylinder and
With the other of the long members connected to the wing,
The cylinder is installed in a rotary snowplow and the lock
When the pin is inserted into the hole of the long member, the wing
Is maintained in a closed state .

[0006]

[0007]

[0008]

A cylinder lock mechanism according to the present invention is provided.
According to the rotary snow plow , a long member is connected to the piston rod of the cylinder, and a guide member is attached to the cylinder body, and the length of the cylinder is adjusted by engaging the long member with the guide member. (The length including the member) can be maintained at a predetermined value. Thus, the length can be maintained at a constant value only by the members related to the cylinder without using other members.

Further, in the snowplow according to the present invention, since a cylinder whose length can be maintained at a constant value by using only the above-mentioned members relating to itself is used, for example, a cylinder directly related to a cylinder such as a snowplow is used. Since the length of the cylinder itself can be locked without using any unnecessary members,
The wing can be locked in the closed position even when the wing is in the upper position or the lower position.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic side view of a rotary snowplow, and FIG. 2 is a plan view of the same. The rotary snowplow includes a self-propelled vehicle 1 equipped with a driving device such as an engine and a hydraulic pump for driving each unit, a rotary snowplow 2 attached to a front end of the self-propelled vehicle 1 and driven by the driving device. Is provided.

The rotary snow removing device 2 is provided at the front end of the auger, and is rotatably driven to cut the snow piled up and scrape the center of the auger, a snow removing frame 3 surrounding the peripheral surface of the back of the auger, A snow blower 4 that is provided behind the frame 3 and that throws the snow taken in by the auger to the side.
It is constituted by.

On the front side of the rotary snow removal device 2, left and right wings 6 and 7 are provided rotatably about the hinges with the rear hinge portions 6a and 7a supported by the snow removal frame 3. The left and right wings 6, 7 are operated by a hydraulic cylinder (not shown) so as to be disposed at an upper or lower position as shown in FIG. A hydraulic cylinder 10 is provided at the upper center of the left and right wings 6 and 7 and at the front center of the snow removal frame 3 so as to extend between them. Is opened and closed.

The hydraulic cylinder 10 will be described. In FIGS. 3 and 4, reference numeral 11 denotes a cylinder body.
The bottom bracket 11 a of the cylinder body 11 is ball-fitted to the connecting portion 3 a of the snow removal frame 3. A slide plate 13 is integrated with the piston rod 12 via a connecting means such as a screw at the distal end of the piston rod 12 protruding from the cylinder body 11 and is connected to the piston rod 12.
Is mounted so as to extend in the longitudinal direction.

A guide member 14 having a U-shaped cross section is attached to the front end of the cylinder body 11 by bolts 15 so as to surround the upper surface of the slide plate 13 and both right and left sides. A hole 13a is provided at the tip of the slide plate 13, and the wings 6, 7 are provided in the hole 13a.
The connection portion extending from the ball is fitted with the ball. An engagement means 20 is provided between the slide plate 13 and the guide member 14, so that the slide plate 13 is held at a position closest to the cylinder body 11 side.

The engaging means 20 is provided with a hole 21 at an intermediate portion of the slide plate 13, while a lock pin 22 is provided at a front end of the guide member 14 so as to be able to advance and retreat in a direction orthogonal to the slide plate 13. The lock pin 22 is moved forward and backward by a hydraulic cylinder 23. When the slide plate 13 reaches the position closest to the cylinder body 11, the lock pin 22 faces the hole 21, and when the lock pin 22 advances downward in this state, the tip of the lock pin 22 moves downward. The slide plate 13 is inserted into the hole 21 so that the relative displacement of the slide plate 13 with respect to the cylinder body is restricted.

Next, the operation of the rotary snow plow having the above configuration will be described. When snow is to be removed by the rotary snowplow, the cylinder 10 is extended as shown by a two-dot chain line in FIG. 2 to open the left and right wings 6 and 7. This is the same regardless of whether the left and right wings 6 and 7 are at the lowered position or the raised position.

On the other hand, during a normal running state in which snow is not removed, the cylinder 10 is contracted to close the left and right wings 6 and 7 as shown by a solid line in FIG. 2, and this state is locked. Specifically, the cylinder 10 is shortened to bring the slide plate 13 to the position closest to the cylinder body 11 via the piston rod 12. At this time, the lock pin 22 is
Then, the hydraulic cylinder 23 is operated in this state to advance the lock pin 22 downward, and the tip thereof is inserted into the hole 21. Thereby, the relative displacement of the slide plate 13 with respect to the cylinder body 11 is restricted, and a so-called locked state can be obtained.

In order to release the locked state, the cylinder 23 is operated in reverse, and the lock pin 22 is retracted upward and pulled out from the hole 21. Thereby, the slide of the slide plate 13 becomes free, and the locked state is released.

In the above embodiment, a hydraulic cylinder 23 is provided for moving the lock pin 22 provided on the guide member 14 forward and backward, and by operating this hydraulic cylinder 23, locking and unlocking can be performed automatically. However, the present invention is not limited to this, and the lock pin 22 may be manually inserted into the hole 13 a of the slide plate 13. In the above embodiment, an example in which the present invention is applied to a hydraulic cylinder is shown. However, it is needless to say that the present invention is applicable to a pneumatic cylinder.

[0020]

As described above , according to the rotary snow plow equipped with the cylinder locking mechanism of the present invention , the length of the cylinder (including the length of the cylinder) is increased by engaging the long member with the guide member. (Length) can be maintained at a predetermined value, and thus, the length can be maintained at a constant value only by members related to the cylinder without using other members.

Further, in the snowplow according to the present invention, since a cylinder whose length can be maintained at a fixed value only by the above-described members relating to itself is used, for example, a cylinder directly related to a cylinder such as a snowplow is used. Without the use of missing members, the length of the cylinder itself can be locked by the cylinder itself, so that the wing can be locked in the closed position even when the wing is in the upper or lower position.

[Brief description of the drawings]

FIG. 1 is a side view of a rotary snowplow showing an embodiment of the present invention.

FIG. 2 is a plan view of the rotary snowplow.

FIG. 3 is a side view of a wing opening / closing cylinder used in the rotary snowplow.

FIG. 4 is a plan view of the wing opening / closing cylinder.

[Explanation of symbols]

 Reference Signs List 2 rotary snow plow 3 snow plow 6 wing 7 wing 10 hydraulic cylinder 12 piston rod 13 slide plate 13a hole 14 guide member 20 engaging means 22 lock pin

Claims (1)

(57) [Claims] An elongate member extending in a longitudinal direction of the piston rod is connected to a distal end portion of a piston rod of a cylinder, and a guide member is attached to the cylinder body so as to surround the elongate member. A lock mechanism for a cylinder provided with engagement means between the cylinder and the long member.
A rotary snowplow, wherein the engaging means has a hole in the long member,
Lock pin provided on the guide member so that it can move forward and backward
One of the cylinder and the long member is connected to a snow removal frame.
And the other of the cylinder and the long member
When the cylinder is connected to the rotating
The lock pin is inserted into the hole of the long member
That the wing is kept closed
Rotary excluding a cylinder lock mechanism characterized by the following:
Snow car.