JPS61200227A - Support device for blade - Google Patents

Abstract

PURPOSE:To improve strength of the whole of a device and to relieve the weight of a vehicle, by a method wherein a blade is mounted to a vehicle body through a bracket, a horizontal shaft, first-third vertical shafts, a center bracket, and a stopper. CONSTITUTION:When a vertical load is exerted on the blade parts across a blade 5, the load is supported by a horizontal shaft 21 and a bracket 14. When a load is exerted on the central part of the blade 5, the load is supported by the horizontal shaft 21 and the bracket 24. When the load is exerted on the end part of the blade 5, the load is supported by angling cylinders on both sides to prevent production of bending moment at a swing bar 34. During an angling work, the blade 5 is rotated longitudinally centering around first-third vertical shafts 23, 25, and 17, and during a tilting work, the blade 5 is vertically rotated centering around a horizontal shaft 21, and this prevents an unreasonable force from being exerted on the blade 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an earth removal plate support device for a bulldozer.

(Prior Art) A conventional earth removal plate support device for a bulldozer will be explained with reference to Fig. 9.10. (a) shows the earth removal plate, (b) shows the subframe, and (C) shows the main body frame (not shown). (d) (e) (e') is the hydraulic cylinder, (
f) (g) (h) (i) (p) is pin, (j)
is an arc-shaped guide rail in the vertical direction, (k) (1) is an arc-shaped guide rail in the vertical direction, (m) (n) is a plate, and the subframe (b) is connected to the support beam ( c) so as to be rotatable in the front-back direction, and one end of the hydraulic cylinder (d) is attached to the earth removal plate (a) through the bin (f).
) is pivoted at the top.

The other end of the hydraulic cylinder (d) is pivotally supported on the side of the subframe (b) via a pin (g), and the hydraulic cylinder (e)
One end of the hydraulic cylinder (e) is pivotally supported on the upper surface of the subframe (b) via a bottle (h), and the other end of the hydraulic cylinder (e) is attached to a bottle (1).
The hydraulic cylinder (e) is pivotally supported via the support W (C).
One end of the hydraulic cylinder (e゛) is pivotally supported on the upper surface of the subframe (b) via a bottle (h), and one end of the same hydraulic cylinder (e゛) is connected to the subframe via a bottle (h) in the same way as the hydraulic cylinder (e). It is pivotally supported on the upper surface of the frame (b).

The other end is pivotally supported on the support beam (c) via the bin (i), and the arc-shaped guy F with a cross-section is formed on one side of the back surface of the earth removal plate (a).
I/- rail (j) is fixed, and an arcuate guide rail (j) with a cross-sectional shape is fixed to one side of the back of the earth removal plate (a).
An arc-shaped guide rail (k) (+) with a cross-sectional shape is fixed to the remaining side of the back of the earth removal plate (a), and the subframe (b)
Plate (m) (n) is fixed by welding to the front surface of the arcuate guide rail (III).
j) in a slidable manner, and play 1 (n) engages in the arcuate guide rails (k) and (1) in a relatively fixed and rotatable manner. One side of board (a) is forward and the other side is backward.

(1) tilting work (1) tilting work (1) tilting work (1) tilting work (1) work in which one side of the earth removal plate (a) is moved upward and the other side is moved downward as seen from the front of the vehicle. That is, the angle work is carried out using hydraulic cylinders (e) (e”
) in the extension direction, and the same hydraulic cylinder (e)
Activate the other side of (e') in the contraction direction to move one side of the earth removal plate (a) forward and the remaining side backward, and perform the second operation.

Also, the tilting work.

The hydraulic cylinder (d) is operated in the extension direction, and the earth removal plate (a)
Side arc-resistant guide rail (k) (]) and subframe (
Place the soil removal plate (a) on the ninth side with the plate (m) on the b) side as the center.
Either rotate it counterclockwise as shown in the figure, or operate the hydraulic cylinder (d) in the retracting direction to move the arcuate guide rail (k) (+) on the earth removal plate (a) side and the plate (on the subframe (b) side). m
) by rotating the earth removal plate (a) clockwise as shown in Fig. 9.

(Problems to be Solved by the Invention) In the bulldozer earth removal plate support device shown in FIG. 9.10,
(I) Arc-shaped guide rail (j) (k) (1)
Section 1 of the subframe (b) plate (
m) (n) is engaged and when a pulling force is applied to the subframe (b), the arc-shaped guide rail (j) (k)
The strength of (1) was not sufficient and there was a risk of breakage. (
■) Plays 1- (m) (n) of the arc-shaped guide rail (D (k) (1) and subframe ()) are slidably engaged, and it is necessary to provide a gap between them. There is,
The soil removal plate (,'') tends to wobble, making it impossible to perform work with high precision. (III) The subframe (1) is fixed to the front part of the support beam (c), which causes the earth removal plate (a) to protrude further forward, causing the vehicle to become unbalanced. Since the transmission of the information is carried out through the subframe (b), there is a problem in that the subframe (b) requires a higher rigidity than the subframe (b).

The present invention addresses the above-mentioned problems by attaching the rear end of the support (2) to the main body frame so as to be rotatable in the vertical direction about a horizontal axis in the left-right direction, and A bracket is attached to the center of the front of the support beam to enable rotation in the front-rear direction about a first vertical axis and tilting about the horizontal axis in the front-rear direction, and a bracket is attached to the center of the front of the support beam;
A center bracket is attached to the same bracket so as to be rotatable in the front-rear direction about a second vertical axis located directly above the first vertical axis, and the earth removal plate is placed at the center of the back surface.

A plate for preventing the attached earth removal plate from tipping forward is slidably engaged with the center bracket, and a guide rail is attached to both rear wings of the earth removal plate along an imaginary arc centered on the first vertical axis. The swing bar extending from the center bracket in the left and right direction is slidably engaged with each guide rail, and the front ends of the left and right angle cylinders are attached to both ends of the swing bar by vertical shafts. The rear end of each of the angle cylinders is pivotally supported on the right and left sides of the support beam by a vertical shaft, and one end of the tilt cylinder is provided with a horizontal shaft that projects rearward from the back surface of the soil removal plate. and the other end of the tilt cylinder is pivotally supported to the bracket by a third vertical shaft located directly above the first and second vertical shafts.

The purpose is to improve the overall strength of the 9 device. Another object of the present invention is to provide an improved earth removal plate support device that can reduce the weight of a vehicle.

(Means for Solving the Problems) As described above, the earth removal plate support device of the present invention enables the rear end of the support beam to rotate vertically around the horizontal axis in the left-right direction with respect to the main body frame. Attach the lower center of the earth removal plate to the front center of the support beam so that it can rotate in the front-rear direction about the first vertical axis and tilt around the horizontal axis in the front-rear direction, and then attach the bracket to the A center bracket is attached to the support beam at the center of the front part, a center bracket is attached to the bracket so as to be rotatable in the front and rear directions about a second vertical axis located directly above the first vertical axis, and the earth removal plate is attached to the center of the back side. A plate for preventing the earth removal plate from tipping forward, which is attached to the earth removal plate, is slidably engaged with the center bracket, and a guide rail is attached to both rear wings of the earth removal plate in an imaginary arc centered on the first vertical axis. Along the
Both ends of a swing bar extending in the left-right direction from the center bracket are slidably engaged with the respective guide rails, and the front ends of left and right angle cylinders are pivoted to both ends of the swing bar by vertical shafts. At the same time, the rear end of each of the angle cylinders is pivotally supported on both left and right sides of the support beam by a vertical shaft, and one end of the tilt cylinder is pivotally supported on the soil removal plate by a horizontal shaft that projects rearward from the back surface thereof. At the same time, the other end of the tilt cylinder is pivotally supported on the bracket by a third vertical shaft located directly above the first and second vertical shafts, and both wing parts of the earth removal plate receive a load in the vertical direction. When this load is supported by the longitudinal horizontal axis installed at the center of the front part of the support beam and the bracket connected via the tilt cylinder, and when the center of the earth removal plate receives the load, the plowing load However, since it is supported by the longitudinal horizontal axis provided at the center of the front part of the support beam and the center bracket in contact with the center of the back surface of the earth removal plate, the strength of the two earth removal plate support device is improved. Also, when the end of the earth removal plate receives a load.

This load is supported by the vertically rotating angle cylinders (left and right angle cylinders) of the support beam 5, so no bending moment is generated on the swing bar, and there is no need to increase the rigidity of the swing bar. Weight is reduced. Also, during angle work, the earth removal plate is the first.
2.3 Rotates back and forth around a vertical axis during tilting work.

The earth removal plate rotates vertically around the front-rear horizontal axis provided at the center of the front of the support beam, so when transitioning from angle work to tilting work.

Alternatively, when transitioning from tilting work to angling work, undue force is not applied to the earth removal plate, and the earth removal work is performed smoothly.

(Example) Next, the earth removal plate support device of the present invention will be explained using an example shown in FIGS. 1 to 7. (1) is an engine cover of a bulldozer, (2) is a frame, (3) is the abdominal girdle, (4
) is a support beam, and the rear end of the support beam (4) is attached to the main body frame (not shown) so as to be rotatable in the vertical direction about a horizontal axis (8) in the left-right direction, and the lift cylinder ( 7
) (7°) are pivotally supported by the brackets (6) (6°) provided on both left and right sides of the support beam (4) and the frame (2) by a horizontal axis in the left and right direction. A bracket 7'r (22) provided at the center of the lower part of the earthen plate (5) is attached to the center of the front of the support beam (4) for rotation in the front-rear direction about the first vertical axis (23) and for rotation in the front-rear direction. Horizontal axis (21)
The bracket can be mounted so that it can be tilted around the center. - (14) is attached to the front center of said support 9 (4), and the center bracket (24) is attached to said bracket (
14), a second vertical axis located directly above the first vertical axis (23);
A plate (26) for preventing the earth removal plate from falling forward, which is attached to the center of the back of the earth removal plate (5) and is attached so as to be rotatable in the front and rear directions around the vertical axis (25), is attached to the center bracket, 71. - (24) is slidably engaged with the guide rail (hook plate) (31), (32) and (31);
') (32') are provided along an imaginary circular arc centered on the first vertical axis (23) on both rear wing parts of the earth removal plate (5), and extend in the left-right direction from the center bracket (24). Both ends of the swing bar (34) are slidably engaged with the respective guide rails (31) (32) and (31') (32''), and the left and right angling soliders (11) (
The front end of 11') is i? Vertical axis (13) (13") at both ends of the swing bar (34) (13")
(not shown)), and the rear ends of the respective angle cylinders (+1) (11") are attached to vertical shafts (12) (+2') ((1
2) is pivotally supported by a tilt cylinder (1
One end of the earth removal plate (5) is pivotally supported by a horizontal shaft (16) protruding rearward from the back surface of the earth removal plate (5), and the other end of the tilt cylinder (15) is supported by the earth removal plate (5).
) is pivotally supported by a third vertical shaft (17) located directly above the first two vertical shafts (23, 25) and a spherical bearing (18). Note that the central part of the swing bar (34) and the swing bar (34) are
fixed by the guide rails (31) (32)
Brackets (33) (33') which are slidably engaged with (31') and (32) are fixed by Pol I- (36).

(Function) Next, the function of the earth removal plate support device shown in FIGS. 1 to 7 will be explained. (1) Raising and lowering the earth removal plate (5).

This is achieved by the expansion and contraction of the Lifton rings (7) and (7'), which causes the support beam (4) to rotate vertically around the pin (8). (TJ) Angling of the earth removal plate (5) is carried out by operating one of the two angle cylinders (11) (11') in the direction of extension.
1.2.3 vertical shafts (23) (25
) (+7).

(III) For tilting of the earth removal plate (5), the tilting cylinder (15) operates in the extension direction, and the guide plate (hook plate) (31) (32) of the earth removal plate (5)
The engaging surfaces of (31') and (32') are connected to the bracket (33
) (33'), the earth removal plate (5) rotates in one direction around the first vertical axis (23), and the tilting cylinder (5) also operates in the contraction direction. Then, attach the guide plate (hook plate) (3) of the soil removal plate (5).
1) The retaining surfaces of (32) and (31°) (32") slide against the bracket (33) (33"), and the earth removal plate (5) is centered on the first vertical axis (23). 1 by rotating in the other direction.

(Effects of the Invention) As described above, the support device for the earth removal plate of the present invention is such that the rear end of the support beam is attached to the main body frame so as to be rotatable in the vertical direction about the horizontal axis in the left and right direction, and the earth removal plate is The lower center of the support beam is attached to the front center of the support beam to enable rotation in the front-rear direction about the first vertical axis and tilting around the horizontal axis in the front-rear direction. Installed in the center of the front
A center bracket is attached to the same bracket so as to be rotatable in the front-back direction about a second vertical axis located directly above the first vertical axis, and the earth removal plate is attached to the center of the back side, and the earth removal plate is tilted forward. A prevention plate is slidably engaged with the center bracket, and guide rails are provided on both rear wings of the earth removal plate along an imaginary arc centered on the first vertical axis, and guide rails are provided along an imaginary arc centered on the first vertical axis. Both ends of a swing bar extending in the direction are slidably engaged with each guide rail,
The front ends of the left and right angle cylinders are pivoted to both ends of the swing bar by vertical shafts, and the rear ends of the left and right angle cylinders are pivoted to both left and right sides of the support beam by vertical shafts, and seven tilt cylinders are provided. One end of the tilt cylinder is pivotally supported on the earth removal plate by a horizontal shaft protruding rearward from the back surface thereof, and the other end of the tilt cylinder is mounted on the bracket as a third vertical shaft located directly above the first and second vertical shafts. It is pivotally supported by a shaft, and when both wings of the earth removal plate receive a load in the vertical direction, this load is connected to the horizontal axis in the front and back direction provided at the center of the front part of the support beam via a tilt cylinder. When the center of the earth removal plate receives a load, the load is applied to the horizontal axis in the longitudinal direction provided at the center of the front part of the support beam, and the center that contacts the center of the back of the earth removal plate. Since it is supported by the bracket, the strength of the wooden earth removal board support device can be improved. In addition, when the end of the earth removal plate receives a load, this load is supported by the vertically rotating angle cylinders (left and right angle cylinders) of the support beam, so that no bending moment is generated on the swing bar. There is no need to increase the rigidity of the swing bar, and the weight of the vehicle can be reduced. Also, during angle work, the earth removal plate is the first.
2.3 Rotates back and forth around a vertical axis during tilting work.

When transitioning from angle work to tilting work, the earth removal plate rotates vertically around the front-back water skewer shaft provided at the center of the front of the support beam.

Alternatively, when transitioning from tilting work to angling work, there is an effect that unreasonable force is not applied to the discharge plate, and the soil discharge work can be carried out smoothly.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to these embodiments (1, various design modifications may be made without departing from the spirit of the present invention). For example, as shown in FIG. ) ((41a) is the shaft of the same spherical bearing (41)).

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the earth removal plate support device according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a rear view taken along the line m-m in FIG. Figure 4 shows the arrow TV- in Figure 2.
5 is a side view taken in the direction of the arrow ■ in FIG. 3, FIG. 6 is a longitudinal rear view taken along the line V+-Vt in FIG. 5, and FIG. 8 is a longitudinal sectional side view showing another embodiment; FIG. 9 is a perspective view of a conventional soil removal plate support device; and FIG. FIG. 3 is a plan view seen from the direction of arrow X in the figure. (4)...Support beam, (8)...Horizontal axis in left and right direction, (5)...Discharge plate, (23)...First
Vertical axis, (21)...horizontal axis in the front-rear direction, (14)
... Bracket (24) ... Center bracket, (25) ... Second vertical axis, (26) ・
・・Plate for preventing the discharge plate from falling forward, (31) (3
2) and (31') (32°)...Guide rail, (34)...Swing bar, (11) (
11°)...Left and right angle cylinders, (12
) (12') (13) (13")...Vertical axis for pivoting the angle cylinder, (15)...Tilt cylinder, (16)...Horizontal axis for pivoting the tilt cylinder, ( 17)...Third vertical axis for pivoting the tilt cylinder. Sub-agent patent attorney Shigefumi Okamoto and two others

Claims (1)

[Claims] The rear end of the support beam is attached to the main body frame so as to be rotatable in the vertical direction around a horizontal axis in the left-right direction, and the lower center of the earth removal plate is centered around the first vertical axis at the front center of the support beam. A bracket is attached to the center of the front part of the support beam, and a center bracket is attached to the first bracket.
The earth removal plate is attached so as to be rotatable in the front and rear directions around a second vertical axis located directly above the vertical axis, and the plate for preventing the earth removal plate from falling forward, with the earth removal plate attached at the center of the back, is slid onto the center bracket. a swing bar that is movably engaged and that guide rails are provided along an imaginary arc centered on the first vertical axis on both rear wing portions of the earth removal plate, and that extends from the center bracket in the left-right direction; are slidably engaged with the guide rails, and the front ends of the left and right angle cylinders are pivotally supported by vertical shafts on both ends of the swing bar, and the rear ends of the left and right angle cylinders are connected to the support beam. One end of the tilt cylinder is pivotally supported on the left and right sides of the earth removal plate by a horizontal shaft protruding rearward from the back surface thereof, and the other end of the tilt cylinder is mounted on the bracket as shown in FIG. A support device for an earth removal plate, characterized in that it is pivotally supported by a third vertical shaft located directly above the first and second vertical shafts.