JPH09184162A - Angle-tilt dozer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make either of operations in angle motion or tilt motion executable with a single hydraulic cylinder by changing a installation position of the hydraulic cylinder supporting a blade. SOLUTION: On executing operations in tilt motion, a connecting rod 36 is arranged at the upper part and a hydraulic cylinder 43 is arranged thereunder at one side of a C-shaped frame 11 supporting a blade 15. As the hydraulic cylinder 43 is expanded, a connecting rod 53 is moved through a bell crank 52, pushing the upper part at the opposite side of the blade 15, and thereby the blade 15 makes tilt motion round a longitudinal shaft member 22 of the main connecting member 21 at the lower part of the blade. In the case of executing operations in angle motion, the positions of the connecting rod 36 and the hydraulic cylinder 43 are exchanged, and the tip of the piston rod of the hydraulic cylinder 43 is connected directly to a bracket 35 of the blade 15. Therefore, as the hydraulic cylinder 43 is expanded, the blade 15 makes angle motion round the vertical shaft members 24, 57 at the opposite side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle tilt dozer.

[0002]

2. Description of the Related Art Japanese Examined Patent Publication (Kokoku) No. 50-3123, Shokai No. 5
No. 2-13603, Japanese Patent Publication No. 58-500572, Japanese Patent Publication No. 1-41778 or Japanese Utility Model Publication No. 1-28.
As shown in Japanese Patent No. 129, the conventional angle / tilt dozer is provided with two angle-moving angle cylinders for tilting the blade so as to shift both ends of the blade in the front-rear direction, and both ends of the blade in the vertical direction. One tilt cylinder for tilting, which is tilted so as to be displaced, is provided along the back surface of the blade, or two tilt cylinders are provided at symmetrical positions.

FIG. 4 shows the above-mentioned special table Sho 58-500572.
Fig. 2 shows a conventional angle / tilt dozer described in Japanese Patent Laid-Open Publication No. HEI-G-1. Between the bracket 4 and the rear surface of the left and right part of the blade 3, two angle cylinders 5 for angle movement for tilting both ends of the blade 3 so as to shift in the front-rear direction are attached symmetrically, and the C-shaped frame 1 One tilt for tilting motion that vertically inclines both ends of the blade 3 between the upper part of the tower member 6 vertically standing on the center of the tip and the back surface of the one upper part of the blade 3 The cylinder 7 is attached by a ball joint or a universal joint 8.

[0004]

As described above, in the conventional angle / tilt dozer, a total of three hydraulic cylinders including at least two angle cylinders 5 and one tilt cylinder 7 are used for the angle movement and the tilt movement. Because it is equipped for use, the weight becomes unnecessarily heavy,
It also causes a cost increase.

In particular, under operating conditions in which it is not necessary to simultaneously operate the angle cylinder 5 and the tilt cylinder 7 during operation, the hydraulic cylinder that does not operate merely functions as a rod, and the function as a hydraulic cylinder is effective. Not used for.

The present invention has been made in view of the above point, and by changing the mounting position of the hydraulic cylinder used for the angle motion or the tilt motion, the angle motion and the tilt motion can be performed by one hydraulic cylinder. It is intended to reduce the weight and cost of the angle / tilt dozer and to effectively utilize the hydraulic cylinder by making it possible to obtain both of

[0007]

According to a first aspect of the present invention, an angle motion is provided in which a blade is provided on a frame that is supported by a vehicle body so as to be vertically movable, and both ends of the blade are inclined so as to shift in the front-rear direction. A tilt / tilt dozer capable of tilting by tilting both ends of the blade vertically so that it can be freely rotated between one side of the frame and one side of the blade in the angle and tilt movement directions. A main connecting portion connected to the other side of the frame, a removable connecting rod mounted between the other side of the frame and the other side of the blade, and a connecting rod between the other side of the frame so that the other side of the frame is replaceable. And a motion direction changer for converting the expansion and contraction motion of the hydraulic cylinder into motion along the blade and transmitting the motion to the blade above the main connecting portion. It is the angle-Chirutodoza of the configuration provided with the door.

In the case of tilting motion, the connecting rod is directly connected to the blade, the hydraulic cylinder is connected to the movement direction changing mechanism, and the hydraulic cylinder is extended so that the main connecting portion of the blade is connected via the movement direction changing mechanism. Since the upper part of the blade is pushed horizontally, the blade tilts around the main connecting portion. Also, in the case of angle movement, the tip of the hydraulic cylinder is directly connected to the other side of the blade by exchanging the mounting positions of the connecting rod and the hydraulic cylinder.
When the hydraulic cylinder is extended, the blades make an angular movement about a vertical axis passing through the main connection.

According to a second aspect of the invention, in the angle / tilt dozer according to the first aspect, movement is performed by a bell crank pivotally supported on the other side portion of the frame and a connecting rod arranged along the blade. It forms a direction changing mechanism.

Then, the bell crank converts the movement of the hydraulic cylinder in the front-rear direction to the left-right direction, and the movement of the bell crank is transmitted to the blade at the upper position of the main connecting portion by the connecting rod, thereby centering the main connecting portion. And perform the tilt movement efficiently.

According to a third aspect of the present invention, in the angle tilt dozer according to the first or second aspect, one side rod member and the other side rod member are reversely screwed to both sides of the intermediate rod member. The connecting rod is formed by screwing.

Then, by rotating the intermediate rod member with respect to the rod member on one side and the rod member on the other side, the total length of the connecting rod is adjusted to expand and contract.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIGS.

As shown in FIG. 1, a vehicle body (not shown)
The base end shaft hole 12 of the C-shaped frame 11 is pivotally attached by a shaft member (not shown) so as to be vertically movable, and the upper end shaft holes of the brackets 13a and 13b installed upright on both sides of the C-shaped frame 11 respectively.
A rod tip end of a lift cylinder (not shown) pivotally supported by the vehicle body is connected to the shaft 14 by a shaft member (not shown). Then, the C-shaped frame 11 is vertically rotated by the lift cylinder with the shaft member inserted into the base shaft hole 12 as a fulcrum.

A main connecting portion 21 connects between one end portion of the C-shaped frame 11 and one rear surface portion of the blade 15 so as to be rotatable in the angle movement direction and the tilt movement direction. The angle motion is a motion in a horizontal plane in which both ends of the blade are tilted so as to be displaced in the front-rear direction, and the tilt motion is a motion in a vertical plane in which both ends of the blade are tilted so as to be vertically displaced.

The main connecting portion 21 has a longitudinal shaft member 22 rotatably fitted to one side portion of the C-shaped frame 11 and protrudes forward, and the longitudinal shaft member 22 and the back surface of the blade 15 are provided. Is a universal joint in which a connecting bracket (23) attached to the above is freely rotatable by a vertical shaft member (24) and a horizontal shaft member (25).

Further, a universal joint 33 mounts a connecting rod 32 on one side between the one side bracket 13a on the C-shaped frame 11 and an intermediate stage bracket 31 protruding from the middle stage of the blade rear surface. The universal joint 33 of the middle bracket 31 has a vertical shaft member 34 located on an extension of the vertical shaft member 24 of the main connecting portion 21.

Similarly, the other side connecting rod 36 is provided between the other side bracket 13b on the C-shaped frame 11 and the corresponding bracket 35 protruding from the other side of the back surface of the blade.
It is detachably attached. By making the shaft member of the universal joint 37 detachable, both ends of the connecting rod 36 are detachable.

Bracket on the other side of the C-shaped frame 11
The base end of the hydraulic cylinder 43 is attached to the 13b by a universal joint 44, and the bell crank 52 is rotatably provided on the other side of the tip of the C-shaped frame 11 by a vertical shaft member 41. The hydraulic cylinder 43 is attached to one end of the bell crank 52.
Of the piston rod is connected by a universal joint 44.

This hydraulic cylinder 43 is detachably attached to the connecting rod 36 by detaching the shaft member of the universal joint 44, and one hydraulic cylinder 43 is attached depending on the attaching position.
However, it functions as a tilt cylinder or an angle cylinder as described later.

Further, between the C-shaped frame 11 and the blade 15, the expansion / contraction motion of the hydraulic cylinder 43 is converted into a motion along the back surface of the blade, and the blade is provided above the main connecting portion 21.
A movement direction conversion mechanism 51 that communicates with 15 is provided.

This movement direction converting mechanism 51 is a C-shaped frame.
11 vertically supports the intermediate portion of the bell crank 52 by the vertical shaft member 41, at the end of the bell crank 52 on the blade side,
One end of a connecting rod 53 arranged along the back surface of the blade is connected by a universal joint 54, and the other end of the connecting rod 53 is
A universal joint 56 connects the upper bracket 55 on the back surface of the blade located above the main connecting portion 21.

The vertical shaft member 57 of the universal joint 56 of the upper bracket 55 is provided coaxially with the vertical shaft member 34 of the middle bracket 31 and the vertical shaft member 24 of the main connecting portion 21.

The bell crank 52 converts the forward / backward movement of the piston rod of the hydraulic cylinder 43 to the left / right direction, and the connecting rod 53 is arranged along the back surface of the blade.
Efficiently transmits the left-right movement of the bell crank 52 to the blade 15 above the main connecting portion 21.

As shown in FIG. 3, the connecting rods 36 and 53 are
Forms a forward female screw 63 and a reverse female screw 64 on both sides of the inner hole 62 of the intermediate rod member 61, and connects the one-side rod member 65 and the other-side rod member 66 to the female screws 63 and 64 on both sides thereof. It is formed by screwing so that it becomes a reverse screw. The one-side rod material 65 and the other-side rod material 66 have connecting shaft holes 67 and 68 at their tips.

These connecting rods 36 and 53 have connecting shaft holes 6
By rotating the intermediate rod member 61 with respect to the one-side rod member 65 and the other-side rod member 66 connected to the mating member at 7, 68, the total length of the connecting rod is adjusted to expand or contract in the extension direction or the contraction direction.

In this way, the blade 15 is attached to the C-shaped frame 11 so as to be capable of angle movement and tilt movement.

Next, the operation of the illustrated embodiment will be described.

FIG. 1 shows the case of tilting motion, and the blade
On the other side of the C-shaped frame 11 that supports 15, the connecting rod 36 is arranged on the upper side and the hydraulic cylinder 43 is arranged on the lower side. That is, the hydraulic cylinder 43 is connected between the bracket 13b on the C-shaped frame 11 and the bell crank 52 to expand and contract by hydraulic pressure.

By this expansion and contraction, the linear motion of the hydraulic cylinder 43 acts on the universal joint 56 at the upper stage of the blade located above the main connecting portion 21 via the bell crank 52 and the connecting rod 53, and the blade 15 is connected to the main connecting portion. Tilt motion is performed with the longitudinal shaft member 22 of the portion 21 as a fulcrum. At this time, the connecting rods 32 and 36 on both sides function as a support when a load is applied to the cutting edge of the blade 15.

FIG. 2 shows the case of the angle movement. Compared with the case of the tilt movement shown in FIG. 1, both upper and lower members are manually operated so that the connecting positions of the connecting rod 36 and the hydraulic cylinder 43 are exchanged. Install in reverse. At this time, the tip of the piston rod of the hydraulic cylinder 43 is directly connected to the rear bracket 35 of the blade 15. Therefore, the expansion and contraction movement of the hydraulic cylinder 43 directly acts on the back bracket 35 of the blade 15.

Further, at the time of this angle movement, since the movement direction changing mechanism 51 is fixed by the connecting rod 36, the connecting rod 53 of this movement direction changing mechanism 51 keeps the universal joint 56 on the back surface of the blade in a fixed position. The vertical shaft member 57 of the joint 56 can be held coaxially with the vertical shaft member 24 of the main connecting portion 21.

That is, the vertical shaft member 24 of the main connecting portion 21.
Since the uppermost vertical shaft member 57 and the uppermost vertical shaft member 57 can be kept on a single vertical line, the blade 15 is angled with these vertical shaft members 24 and 57 as central axes by expanding and contracting the hydraulic cylinder 43. Exercise.

FIG. 3 shows the connecting rod 36 or the connecting rod.
53 is shown, and both sides of the intermediate rod member 61 are threaded so that they are reverse screws to each other.
The rotation of the one side and the other side rod members 65 and 66 expands and contracts.

Therefore, when the hydraulic cylinder 43 is mounted as a tilt cylinder as shown in FIG. 1, the length of the hydraulic cylinder 43 is fixed and the connecting rod 36 is manually expanded and contracted to perform an angle motion. Is possible.

On the other hand, when the hydraulic cylinder 43 is mounted as an angle cylinder as shown in FIG. 2, the length of the hydraulic cylinder 43 is fixed and the connecting rod 36 is manually expanded and contracted to perform the tilting motion. It is possible.

[0037]

According to the first aspect of the invention, by exchanging the mounting positions of the connecting rod and the hydraulic cylinder used for the angle motion or the tilt motion, the angle motion and the tilt motion can be obtained by one hydraulic cylinder. You can get exercise and respectively. Therefore, it is possible to reduce the weight of the angle / tilt dozer, reduce the cost, and effectively use the hydraulic cylinder.

According to the second aspect of the present invention, the longitudinal movement of the hydraulic cylinder is converted to the lateral direction by the bell crank, and the movement of the bell crank is transmitted to the blade at the position above the main connecting portion by the connecting rod. Therefore, the force of the hydraulic cylinder can be efficiently transmitted to the blade during the tilting movement around the main connecting portion.

According to the third aspect of the invention, the total length of the connecting rod can be adjusted by expanding and contracting by rotating the intermediate rod material with respect to the rod material on one side and the rod material on the other side.
The blade can be tilted or angled by manually extending and contracting the connecting rod.

[Brief description of the drawings]

FIG. 1A is a plan view showing a tilting motion state of an angle tilt dozer according to the present invention, and FIG. 1B is a side view thereof.
(C) is the CC sectional view taken on the line of (B).

FIG. 2A is a plan view showing an angled state of the same angle tilt dozer, and FIG. 2B is a side view thereof.

FIG. 3 is a front view of a connecting rod used in the same angle tilt dozer.

FIG. 4 is a perspective view of a conventional angle / tilt dozer viewed from the back side of the blade.

[Explanation of symbols]

 11 Frame 15 Blade 21 Main connection 36 Connection rod 43 Hydraulic cylinder 51 Movement direction conversion mechanism 52 Bell crank 53 Connection rod 61 Intermediate rod material 65 One side rod material 66 Other side rod material

Claims (3)

[Claims] 1. A vehicle body is provided with a blade on a frame rotatably supported in a vertical direction, and both ends of the blade can be tilted so as to be displaced in the front-rear direction, and the blade can be tilted so as to be vertically displaced. In a tiltable angle / tilt dozer, a main connecting part that rotatably connects one side part of the frame and one side part of the blade in the angle movement direction and the tilt movement direction, and the other side part of the frame. A detachable connecting rod mounted between the other side portion of the blade, a hydraulic cylinder attached to the other side portion of the frame so as to be replaceable with the connecting rod between the other side portions, and expansion and contraction of the hydraulic cylinder. And a motion direction conversion mechanism for converting motion into motion along the blade and transmitting the motion to the blade above the main connecting portion.
Tilt dozer. 2. The angle-changing mechanism according to claim 1, wherein the movement direction converting mechanism is formed by a bell crank pivotally supported on the other side portion of the frame and a connecting rod arranged along the blade. Tilt dozer. 3. The connecting rod is formed by screwing one side rod material and the other side rod material to opposite sides of the intermediate rod material so as to be mutually reverse screws. Angle / tilt dozer described.