JP2010285847A - Dozer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dozer device which can perform ridge-surface formation work easily at low cost. <P>SOLUTION: The dozer device is provided with right- and left-side frames 2, a boom 3, a boom cylinder 4, a dozer blade 5, and a tilt cylinder 6. The right- and left-side frames 2 are attached to a tractor 1, and the base ends of the boom 3 are pivotally fixed to the side frames 2. The boom cylinder 4 is arranged between the boom 3 and the side frame 2, and the dozer blade 5 is pivotally fixed at the tip of the boom 3. The tilt cylinder 6 is arranged between the dozer blade 5 and the boom 3. Then an angle-setting means 7 is provided between the dozer blade 5 and the boom 3, and the angle-setting means 7 sets the dozer blade 5 moved by the tilt cylinder 6 at an angle for forming the ridge surface, and regulates the tilt-down operation of the dozer blade 5 exceeding the angle. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dozer device that performs a soil removal operation.

  2. Description of the Related Art Conventionally, a dozer device that performs a soil removal operation by attaching a dozer blade to the tip of a boom of a front loader is known (see, for example, the description of the prior art in Patent Document 1).

Microfilm of Japanese Utility Model No. 57-128293 (Japanese Utility Model Publication No. 59-35452)

In general, when a soil removal operation is performed by a front loader, the front surface of the dozer blade is fixed from an upright position to a slightly tilted state with respect to the ground by a tilt cylinder, and the tractor is moved forward.
On the other hand, when performing the farm surface formation work using the above-described dozer blade, the front surface of the dozer blade is pushed upright from the upright to the ground, and is pressed, so that it has a predetermined slope. Will be formed.
In this case, the conventional dozer device has only to adjust the forward tilt angle of the dozer blade according to the amount of the driver's eyes, i.e., to adjust the protrusion stroke of the tilt cylinder by the operator's manual operation. There was a problem in workability because it was difficult to make the forming angle (slope angle) constant.

  The present invention has been proposed in view of the above-mentioned drawbacks of the prior art, and an object thereof is to provide a dozer device capable of easily and inexpensively carrying out the operation of forming a flush surface.

To achieve the above object, the present invention provides a left and right side frame to be mounted on a tractor, a boom pivotally attached to the side frame, and a boom disposed between the boom and the side frame. A cylinder, a dozer blade pivotally attached to the tip of the boom, and a tilt cylinder disposed between the dozer blade and the boom,
Between the dozer blade and the boom, there is provided an angle setting means for setting the dozer blade by the tilt cylinder to an angle that forms a flush surface and restricting the tilt-down operation of the further dozer blade. Yes.

According to this configuration, the forward tilt angle of the dozer blade at the time of the rake face forming operation can be always regulated to be constant without relying on the operator's eye amount, and the heel face formation angle (slope angle) can be controlled. It becomes easy to make it uniform.
Preferably, the angle setting means is provided so as to regulate an operating angle range by relatively abutting the dozer blade around a pivot shaft pivotally attached to the tip of the boom.
According to this configuration, the angle setting means can be configured easily and inexpensively.

The angle setting means may be capable of adjusting a set angle.
According to this configuration, it is possible to perform the cold face forming operation by appropriately adjusting the hot face forming angle according to the conditions and restrictions of the field.
It is preferable that the dozer blade has an arcuate surface-shaped pressing surface forming pressing surface on the front side.
According to this configuration, the flush surface can be formed in a circular arc shape.

  ADVANTAGE OF THE INVENTION According to this invention, the dozer apparatus which can implement a gauze surface formation operation | work easily and cheaply can be provided.

It is a principal part side view of the attachment state to the tractor of the dozer device concerning the present invention. It is a principal part top view of the attachment state to the tractor of the dozer apparatus which concerns on this invention. It is a principal part expanded side view of the dozer apparatus which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the dozer device of the present invention includes left and right side frames 2 attached to a tractor 1, a boom 3 pivotally attached to the side frame 2, a boom 3 and a side frame. 2, a boom cylinder 4 disposed between the boom 3, a dozer blade 5 pivotally attached to the tip of the boom 3, and a tilt cylinder 6 disposed between the dozer blade 5 and the boom 3.
Then, between the dozer blade 5 and the boom 3, an angle setting means 7 for setting the dozer blade 5 by the tilt cylinder 6 to an angle that forms a flush surface and restricting further tilt-down operation of the dozer blade 5. Is provided.

  The angle setting means 7 is provided so as to regulate the operating angle range by relatively abutting the dozer blade 5 around a pivot shaft 8 pivotally attached to the tip of the boom 3. As a specific configuration, stopper members 7a and 7b are attached to the dozer blade 5 side and the boom 3 side. The stopper member 7a attached to the boom 3 side includes a dosing blade forming angle regulating surface 7a1 and a bucket dumping end regulating surface 7a2 of the dozer blade 5, and a bucket is attached instead of the dozer blade 5. In this case, the dumping operation end of the bucket can be regulated. The dosing blade forming angle regulating surface 7a1 of the dozer blade 5 has a smaller regulating angle (rotation angle about the pivot shaft 8 when the tilt cylinder 6 is extended) than the bucket dumping end regulating surface 7a2. .

The dozer blade 5 includes an arcuate surface forming pressing surface 5a on the front side.
In FIG. 1 and FIG. 2, the tractor 1 shows only the front half and the latter half is omitted. A front axle frame 10 to which a front wheel 9 is attached is provided in the front half of the tractor 1, and an engine, a radiator, a battery, and the like are mounted on the front axle frame 10 and these are covered with a bonnet 11. Yes. A pipe-shaped support base 12 is provided on the rear side of the front wheel 9 so as to protrude from the front axle frame 10 to the left and right sides, and the mounting base having a U-shaped cross-section in plan view opened to the front side. The lower part of 13 is attached. The upper part of the mounting base 13 is disposed above the support base 12, whereby the mounting base 13 is attached to the support base 12 in an upright state.

  The mounting base 13 is a member that receives and attaches the side frame 2 from the front, and the lower and upper halfway parts of the side frame 2 are engaged pins 14 on the vertical middle part and upper part of the mounting base 13. And the mount pin 15 are detachably connected. In this case, the engaging pin 14 is fixedly attached to the mounting base 13 side, and a substantially inverted U-shaped engaging groove that engages with the engaging pin 14 is formed on the side frame 2 side. . On the other hand, the mount pin 15 is manually inserted and removed. When the side frame 2 is connected to the mounting base 13, the mounting pin 15 is manually inserted with the pin holes formed in both the side frame 2 and the mounting base 13 being matched. When it is inserted and separated, it is pulled out manually.

  The side frame 2 is a member having a U-shaped cross section that is open toward the front, and is a member to which the base of the boom 3 and the tip of the piston rod 4a of the boom cylinder 4 are attached. The base portion of the boom 3 is connected to the upper portion of the boom frame 4 by a pin 16 parallel to the left-right direction. 17 are connected. The base of the boom cylinder 4 is connected to a bracket 18 on the lower surface side in the middle of the boom 3 by a pin 19 parallel to the left-right direction.

The boom 3 has a square pipe structure with a hollow inside, and has a substantially square shape bent or curved downward from the middle in the longitudinal direction. The left and right booms 3 are used as two booms, and the two right and left booms 3 are connected to each other by a connecting pipe 20 extending in the left-right direction at a position slightly away from the tip toward the base side.
A dozer blade 5 is attached to the tip of the boom 3. The dozer blade 5 includes a blade main body 5b and a mounting frame 5c. The blade main body 5b has a plate shape that is long in the left-right direction and has a front surface that is an arcuate surface forming pressing surface 5a. A dozer claw 5e, which can be replaced with a bolt and nut 5d, is attached, end plates 5f are integrally provided at the left and right ends, and a plurality of reinforcing ribs 5g and two attachment pieces 5h are provided on the rear side. Is provided. The mounting frame 5c has a rectangular pipe shape that is long in the left-right direction, and two mounting pieces 5i are provided on the front side corresponding to the two mounting pieces 5h of the blade body 5b. Is provided with a mounting bracket 5j at the tip of the boom 3. The two attachment pieces 5h of the blade body 5b and the two attachment pieces 5i of the attachment frame 5c are connected by pins 5k parallel to the vertical direction. The mounting bracket 5j is pivotally connected to the tip of the boom 3 by a pivot shaft 8 that is parallel to the left-right direction.

  The tilt cylinder 6 has a base connected to a bracket 22 in the middle in the longitudinal direction of the boom 3 with a pin 23 parallel to the left-right direction. The tip of the piston rod 6 a on the tip of the tilt cylinder 6 is connected to the mounting bracket 5 j of the dozer blade 5 via the link 24. The link 24 has a double-folded structure, and both ends are pivotally attached to the boom 3 and the mounting bracket 5j of the dozer blade 5 by pins 25 and 26 parallel to the left and right directions, and the half-folded part in the middle is The piston rod 6a of the tilt cylinder 6 is connected to the tip of the piston rod 6a by a pin 27 parallel to the left-right direction.

  A stand 28 is attached to the lower surface of the front end side of the boom 3 so that it can be folded and stored. This stand 28 holds the boom 3 in a detachable posture when the boom 3 is removed from the tractor 1. belongs to. A front guard 29 is provided on the front surface of the tractor 1. The front guard 29 is for protecting the entire surface of the tractor, and is attached to the front surface of the front axle frame 10. A ground guide member 30 is attached to the lower part of the back surface of the dozer blade 5, and this ground guide 30 sets the working height of the dozer blade 5 with respect to the ground during the dozer work. The working height can be adjusted.

The embodiment of the present invention has the above configuration, and the operation thereof will be described next.
The tractor 1 performs operations such as advancing and retreating by the driver's steering operation, the boom 3 is raised and lowered by the expansion and contraction operation of the boom cylinder 4, and the angle of the dozer blade 5 is tilted backward by the expansion and contraction operation of the tilt cylinder 6. It can be in a state or in a forward tilt state.
When performing the earth removal work, the tilt cylinder 6 is used to move the dozer blade 5 to the rearward tilted state shown by the solid line in FIG. At this time, since the height of the dozer blade 5 with respect to the ground is set by the ground guide 30, the earth removal work is performed at this height level.

In addition, when performing a rough surface forming operation, the tilt cylinder 6 is operated in the extending direction to bring the dozer blade 5 into the forward tilt state shown by the chain line in FIG. In this case, the stopper 7b of the angle setting means 7 attached to the mounting bracket 5j of the dozer blade 5 is rotated around the pivot shaft 8 until it comes into contact with the stopper 7a of the angle setting means 7 attached to the tip of the boom 3. There is no need for an operation based on the operator's scale. Then, if the tractor 1 is advanced in such a manner that the dozer blade 5 is tilted forward (the state shown by the chain line in FIG. 1), a rough surface can be formed.
As described above, the dozer device of the present invention includes the left and right side frames 2 attached to the tractor 1, the boom 3 pivotally attached to the side frame 2, the boom 3 and the side frame 2. A boom cylinder 4 disposed between the boom 3, a dozer blade 5 pivotally attached to the tip of the boom 3, and a tilt cylinder 6 disposed between the dozer blade 5 and the boom 3. The angle setting means 7 for setting the dozer blade 5 by the tilt cylinder 6 between the dozer blade 5 and the boom 3 to an angle that forms a rough surface and restricting further tilt-down operation of the dozer blade 5. Therefore, the forward tilt angle of the dozer blade 5 during the operation of forming the flared surface can be always regulated to be constant without depending on the operator's eye amount. Degrees (the slope face angle) it is easy to align constant.

The angle setting means 7 is a stopper provided so as to restrict the operating angle range by relatively abutting the dozer blade 5 around a pivot shaft 8 pivoted on the tip of the boom 3. Since the members 7a and 7b are used, the angle setting means can be configured easily and inexpensively.
Since the dozer blade 5 includes the arc surface-shaped pressing surface 5a having a circular arc surface shape on the front side, the gas generating surface can be formed into an arc surface shape.
Further, the dozer apparatus of the present invention can attach a bucket to the tip of the boom 3 instead of the dozer blade 5 and perform a squeeze / dump operation by the tilt cylinder 6. At that time, since the angle setting means 7 is provided with the bucket dumping end regulating surface 7a2, it is possible to prevent damage caused by the extending operation of the tilt cylinder 6 during the bucket dumping operation.

  The embodiments of the present invention are as described above, but the present invention is not limited to these embodiments, and can be implemented with appropriate modifications. For example, in the dozer blade 5, the blade body 5b and the mounting base frame 5c are connected by the pins 5k via the two mounting pieces 5h and 5i, but the mounting base frame 5c is omitted and the blade main body 5b is connected. The mounting bracket 5j may be directly attached to the. Moreover, although the angle setting means 7 has illustrated the case of a fixed type, it is good also as adjustment of a setting angle. In that case, for example, the stopper member 7a attached to the tip of the boom 3 may be rotated and fixed stepwise or steplessly around the pivot shaft 8 to be fixed.

  The dozer device of the present invention can be used for agriculture, light civil engineering work, and the like.

DESCRIPTION OF SYMBOLS 1 Tractor 2 Side frame 3 Boom 4 Boom cylinder 5 Dozer blade 6 Tilt cylinder 7 Angle setting means 8 Pivoting shaft 9 Front wheel 10 Front axle frame 11 Bonnet 12 Support base 13 Mounting base 14 Engaging pin 15 Mount pin

Claims (4)

Left and right side frames attached to the tractor, a boom pivotally attached to the side frame, a boom cylinder disposed between the boom and the side frame, and pivotally attached to the tip of the boom A dozer blade, and a tilt cylinder disposed between the dozer blade and the boom,
An angle setting means is provided between the dozer blade and the boom, and an angle setting means is provided for setting the dozer blade by the tilt cylinder to an angle that forms a flush surface and restricting further tilt-down operation of the dozer blade. Dozer device to do.   The angle setting means is provided so as to regulate an operating angle range by relatively abutting a dowel blade around a pivot shaft pivotally attached to a tip of the boom. The dozer device according to claim 1.   The dozer apparatus according to claim 1 or 2, wherein the angle setting means is capable of adjusting a set angle.   The dozer device according to any one of claims 1 to 3, wherein the dozer blade is provided with an arcuate surface-shaped pressing surface forming pressing surface on the front side.

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