JPH04254623A - Work machine installing device for running vehicle - Google Patents

Abstract

PURPOSE:To prevent a tightening device from being cut by receiving a front- back load applied in excavating work using a backhoe with a back surface of a running vehicle. CONSTITUTION:A base plate 38 of an installation frame body 37 is applied by surface to be combined with a back surface 35 of a running vehicle 24. A peripheral surface 45 of a PTO transmission case 34 is applied by surface to the base plate 38 to be combined with it. A tightening device for applying the base plate 38 to the running vehicle 24 and the PTO transmission case 34 is provided. Right and left side plates 39 are protruded from the base plate 36, and installation parts 57, 58 for installing the front parts of installation frame bodies 56A, 56B to the side plates 39 are provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work equipment mounting device for a traveling vehicle, and is used for mounting a backhoe.

0002

2. Description of the Related Art Since a backhoe is an excavating machine, it must be firmly attached to the rear of a traveling vehicle body, such as a tractor body. Therefore, as shown in FIG. 13, a reinforcing frame 2 along the longitudinal direction is attached to the lower left and right sides of the tractor body 1, and a pair of left and right lower brackets 3 are fixed to the rear lower part of the tractor body 1 and the rear part of the reinforcing frame 2. A lower link connecting pin 4 and a lower connecting part 5 are provided on each of the left and right lower brackets 3, and both lower brackets 3 are connected by a connecting member, and a pair of left and right upper brackets 6 are fixed to the rear upper part of the vehicle body 1, A top link connecting pin hole 7 is formed in the front part of the bracket 6, and an upper connecting part 8 is provided in the rear part, and a pair of left and right threaded rods 10 are screwed into the upper position of the front part of the backhoe 9 to lock it. The present applicant has proposed a technique in which upper and lower connected parts 12 and 13 are removably connected to the upper and lower connecting parts 5 and 8 through locking means that are locked by tightening the cotter bolt 11 in position ( Patent application 1986-12685
(See No. 4). In FIG. 13, reference numeral 14 denotes a swing frame, which swings left and right around a swing axis 16 connected to a mounting frame 15 as a fulcrum by the telescoping action of a swing cylinder 17, and the boom 18 of the backhoe 9 is raised and lowered by a boom cylinder 19. Further, a hydraulic case 20 containing a three-point linkage hydraulic actuator is mounted on the rear upper part of the tractor body 1 .

0003

[Problems to be Solved by the Invention] The above-mentioned conventional technology has two upper and lower connecting parts 5 and 8 for attaching the backhoe 9.
The upper and lower brackets 3 and 6 provided with are fixed to the vehicle body 1, and in particular, the left and right lower brackets 3 are fixed to the vehicle body 1 and to the reinforcing frame 2, and the left and right sides are connected to each other via a connecting member. Therefore, sufficient strength can be obtained and the backhoe 9 can be firmly attached. At the same time, the lower bracket 3 is provided with a lower link connecting pin 4, and the upper bracket 6 is provided with a top link connecting pin. Since hole 7 is formed,
After removing the backhoe 9, remove the upper and lower brackets 3 and 6.
It has the advantage that a three-point link mechanism for connecting other work equipment can be attached without removing the work equipment, many types of work equipment can be attached to the tractor, and replacement work is easy.

However, as the backhoe 9 becomes larger, it is necessary to increase the mounting strength.
In the conventional technology mentioned above, the load F in the longitudinal direction accompanying excavation work is
When it acts repeatedly, the car body 1 and the upper and lower brackets 3 and 6
There is a risk of peeling at the attachment point.
Also, bolts 3A for attaching the lower bracket 3 to the vehicle body 1.
There was also a risk that the shearing force due to the load F would act on the material and cause it to break.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work equipment mounting device for a traveling vehicle that can improve mounting strength by absorbing loads that are repeatedly applied in the front-rear direction using a vertical surface.

[0006]

[Means for Solving the Problems] The present invention provides a traveling vehicle body 24
A hydraulic case 26 with a built-in three-point link hydraulic actuator in the rear upper part, a rear work equipment mounting frame 37 fixed to the rear of the traveling vehicle body 24, and a PT with a built-in PTO transmission 33.
In order to achieve the above-mentioned object, the following technical measures are taken in the working machine mounting device for a traveling vehicle equipped with the O transmission case 34.

That is, in the present invention according to claim 1, the rear work equipment mounting frame 37 is attached to the rear elevational surface 35 of the traveling vehicle body 24.
The substrate 38 is formed with a window 40 through which the transmission shaft 36 interlocked with the transmission 33 in the PTO transmission case 34 is inserted back and forth.
The peripheral surface 45 of the PTO transmission case 34 is overlapped with the peripheral surface of the PTO transmission case 34, and the substrate 38 is sandwiched between the rear elevational surface 35 of the traveling vehicle body 24 and the PTO transmission case 34, and the three parts 24, 38, and 34 are fastened together. A fastener 47 is provided, and the board 38 includes left and right side plates 39, 39 located on both left and right sides of the PTO transmission case 34.
The left and right side plates 39, 39 are connected to each other, and the mounting portions 57, 39 of the rear working machine 23 are provided with
58. Further, the present invention according to claim 2 is characterized in that the substrate 38 of the rear work equipment mounting frame 37 is overlapped with the rear elevation surfaces 35, 41 of the traveling vehicle body 24 and the hydraulic case 26, facing each other. It is something to do. Further, in the present invention according to claim 3, an auxiliary frame 61 that is long in the front and rear direction is fixed to the lower left and right sides of the traveling vehicle body 24, and the rear part of this auxiliary frame 61 is connected to the front lower part of the rear mounting frame 37. It is characterized by the presence of

[0008]

[Operation] In the present invention according to claim 1, the load F in the longitudinal direction
When this occurs, the substrate 3 facing the rear elevation 35 of the vehicle body
8 is sandwiched between the PTO transmission case 34, so that it is received by the plane, and even if the load F is considerably large, the fastener 37 will not break.

In the present invention according to claim 2, since the substrate 38 faces not only the rear elevational surface 35 of the vehicle body 24 but also the rear elevational surface 41 of the hydraulic case 26 on the vehicle body 24,
The area that receives the load on the surface is expanded. In the present invention according to claim 3, an auxiliary (reinforcement) long in the longitudinal direction of the vehicle body 24 is provided.
The frame 61 and the board 38 form an L shape when viewed from the side, and there is no fear of the car body 24 cracking.

0010

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 10 showing the whole, a traveling vehicle 21 exemplified as a two-axle, four-wheel type tractor is equipped with a front working device 22, exemplified by a front loader, at the front, and a rear working device 23, exemplified by a backhoe, at the rear. The vehicle body 24 of the vehicle 21 is made of a cast metal case or the like, and a three-point linkage hydraulic case 26 having a pair of left and right lift arms 25 is mounted on the rear upper part of the vehicle body 24.

A hydraulic actuator consisting of a cylinder, a piston, etc. is built into the hydraulic case 26, and the actuator moves the lift arm 25 up and down. It is equipped with a driving device 27 that can be freely changed between the backward movement position and the backward movement position. The backhoe includes an outrigger device 28, a boom 29, and each cylinder device 30, and can perform excavation work by operating each control system of a control box 31 from a driving device 27 in a backward driving position.

Referring to FIGS. 1 to 3, the vehicle body 24 is essentially a transmission case, and a driving system transmission device (transmission, differential device, etc.) and a PTO system transmission device are built into this case. and the PTO is installed at the rear of the differential.
A PTO transmission case 34 incorporating a PTO transmission 33 that drives a shaft 32 is provided. A rear elevational surface 35 of the vehicle body 24 is a vertical plane, and a window for a transmission shaft 36 interlocked with the PTO transmission 33 is formed in the rear elevational surface 35, and this window substantially covers the PTO transmission case 34. It will be covered.

The rear work equipment mounting frame 37 is mainly composed of a base plate 38 and left and right side plates 39 that are fixed to the left and right sides of the base plate 38 and project rearward and are parallel to each other. A vertical rectangular window 40 is formed in the center thereof, and the window 40 faces the window formed in the rear elevational surface 35 in the front and back, and the transmission shaft 36 is inserted in the front and back direction. It is possible.

The base plate 38 has approximately the same width and length as the vehicle body 24, and has a protruding surface 42 at the center of its upper end that also faces and overlaps the rear elevational surface 41 of the hydraulic case 26. In the peripheral surface of the window 40 formed in 38, bolt insertion holes 44 in the front and back direction are formed on the top, bottom, left and right. P.T.O.
The bolt insertion hole 4 is provided in the peripheral surface 45 of the transmission case 34.
The peripheral surface 45 of the PTO transmission case 34 is overlapped with the peripheral surface of the board 38, and a fastener 47 is inserted into each bolt insertion hole. By inserting a certain bolt from the rear and screwing it into a screw hole formed in the rear elevation 35 of the vehicle body, the rear elevation 35 of the traveling vehicle body 24 and the transmission case 34 are connected to the board 38.
The three members 24, 38, and 34 are fastened and integrated by sandwiching them.

Therefore, the rear work equipment mounting frame 37 is substantially a part of the vehicle body 24, and left and right side plates 39 are located on both left and right sides of the transmission case 34. The so-called retrofitting of the PTO transmission case 34 involves connecting the input side of the transmission 33 assembled and built into the case 34 from the window 40 to the transmission shaft 36.
This can be done by connecting with a shaft coupling (not shown).

The left and right side plates 39 are then connected to each other at their upper parts by an upper connecting member 48 made of a plate material, and at the rear lower part thereof are connected to each other by a lower connecting member 49 made of a plate material and a pipe material. It is a rectangular mounting frame 37 made of a metal plate, a cast plate, or the like with a space. On each outer side of the left and right side plates 39 of the rear work equipment mounting frame 37, an outer plate 50 which is substantially trapezoidal in side view is fixed to the base plate 38 together with a reinforcing plate 50A, and the front edge of the outer plate 50 is attached to the vehicle body 24. Rear axle case base 5 that protrudes more outward to the left and right
A semicircular portion 52 is formed along the arc semicircle of No. 1, and the semicircular portion 5
It has attachment tubes 53 from the sides (lateral direction) above and below the vehicle body 24, and is also connected to both side elevations 55 of the vehicle body 24 by fasteners 54 such as bolts inserted through the attachment tubes 53.

The rear working machine 2 is mounted on the left and right side plates 39 of the mounting frame 37.
Upper and lower mounting parts 57, 5 for attaching the upper and lower parts of the mounting frame 56 of No. 3
8, the lower mounting portions 58 are formed by fixing lower brackets formed in a substantially trapezoidal shape to the lower rear outer surfaces of the left and right side plates 39, and the upper mounting portions 57 are formed on the upper surface of the connecting member 58 and at the rear of the left and right side plates 39. A pair of left and right upper brackets formed in a substantially inverted trapezoid shape are fixed to the upper part of the inner surface. A mounting plate 60 having a connecting pin 59 for connecting a lower link (not shown) of a three-point linkage mechanism is fixed to the front lower part of each pair of left and right outer plates 50 with bolts or the like. The rear part of an auxiliary frame 61 that is long in the front-rear direction and is fixed to the lower left and right sides of the vehicle body 24 is connected to the mounting frame 37.

Furthermore, the substrate 3 in the rear working machine mounting frame 37
A top link mounting base 64 made of a pair of left and right plates having a mounting hole 63 for a top link 62 in a three-point linkage mechanism is attached to the upper center of the 8 with a fastener such as a bolt, and the reference numeral 65 in FIG. This is a bolt insertion hole. A lock bracket 67 is provided on the connecting member 48 between the pair of left and right upper brackets 57, which are the upper mounting portions, and is capable of swinging around the horizontal pin 66 shown in detail in FIGS. 6 and 7. 67 is fitted between the plates of a top link mounting base 64 made up of a pair of left and right plates, and can be held in a locked position by a holder 68 such as a rod or bolt that can be inserted into the mounting hole 63.

When the lock bracket 67 is held in the locked position, that is, in the positions shown in FIGS. 2 and 7, the lock bracket 67 has a screw hole 69 whose axis is in the vertical direction, and is screwed into this screw hole 69. A locking member 71 having a downwardly tapered tapered engaging body 70 is provided at the lower part of the threaded rod. Further, the lock member 71 has a handle 72, and each threaded rod has a lock nut 73.

A rod-shaped attachment portion 74 is fixed to the front end of the upper mounting frame 56A at the left and right center portions of the rear work machine 23, with the axis lateral to the rod-shaped attachment portion 74, and the rod-shaped attachment portion 74 has a hexagonal cross section. It has a recess 75 in the center, and the left and right projecting shaft parts fit into the left and right upper mounting parts 57 from above as shown by arrow B in FIG. FIG. 6 shows a guide portion 76 for fitting this rod-shaped attachment portion 74 into the upper attachment portion 57 from above.
As shown in FIG.
7 to ensure horizontal positioning when fitting from above.

When fitting the mounted part 74, the lock bracket 67 is tilted toward the top link mounting base 64 using the horizontal pin 66 as a fulcrum, and is raised after the mounted part 74 is fitted to the upper mounting part 57. The tapered engaging portion 70 of the locking member 71 is positioned directly above the recessed portion 75, and by operating the handle 72, the locking member 71 is screwed down and the tapered engaging member 70 is pressed against the recessed portion 75, thereby eliminating play. The lock member 71 and the like constitute upper locking means. In this upper locking state, the lock bracket 67 is
, as shown in FIG.
4, and by allowing sliding between the engaging portion 70 and the recess 75, the threaded portion of the locking member 71 and the screw hole 69
prevents damage.

The tapered engaging portion 70 of the locking member 71 has a conical shape as shown in FIGS. 6 and 7, and is capable of locking while preventing uneven contact and the screw portion of the locking member 71 from collapsing. In order to further prevent screw failure due to one-sided contact, it is advantageous to form the recess 75 into a spherical surface and form a spherical surface matching this spherical surface on the engaging portion 70, as shown in FIG.

In addition to the upper locking means by screwing in a screw rod, the upper locking means can also be provided by a lock bracket 6 as shown in FIG.
7 may be formed with a cylinder chamber 77, a piston 78 having a tapered engagement portion 70 may be fitted into this cylinder chamber 77, and a pressing force may be applied hydraulically via a quick coupler 79, piping 80, etc. However, in this embodiment, when the backhoe is disengaged, the pressing force of the piston 78 is stopped before the supply of hydraulic pressure is stopped and the coupler 79 is removed.

Referring to FIGS. 4 and 5 in addition to FIGS. 1-3, the lower locking means are shown. That is, the left and right lower mounting frames 56B have inverted chevron-shaped lower mounting portions 81 on the left and right that fit into the lower mounting portions 58 from above as shown by arrow C in FIG. A lock member 8 that can be freely engaged and detached from a lock hole 82 formed in the middle part in the height direction of 39
3 above the front of the lower mounting portion 81.

As shown in FIGS. 4 and 5, the locking member 83 has a locking pin 86 having a tapered portion 85 at its tip, which is slidable in the axial direction into an insertion hole 84 formed in the lower mounting frame 56B and having a horizontal seating surface. The L-shaped operation lever 87 is inserted through the lock pin 86 in a vertically fixed manner and is rotatable, and the rotating part of the operation lever 87 and the inner surface of the lower mounting frame 56B are connected to each other. Lock pin 8 between
A coil spring 88 that urges the lock pin 86 inward is fitted onto the lock pin 86.

Further, an actuating body 90 having an L-shape in plan view and having a cam portion 89 is fixed to the operating lever 87, and one side 90A of the actuating body 90 on the cam portion 89 side is connected to the lower mounting frame 56B.
When pressed against the outer surface of the lock pin 86, the tapered portion 85 of the lock pin 86 is wedge-engaged with the receiving member 91 fixed to the upper side of the lock hole 82, while the other side 9 of the actuating body 90
When 0B is pressed, the lock pin 86 is released.

Therefore, after locking by the above-mentioned upper locking means is completed or in the middle of locking, the coil spring 88 is rotated by rotating the operating lever 87 about the cam portion 89 and pressing the other side 90B against the outer surface of the frame 56B. The tapered portion 85 of the lock pin 86 is placed in the compressed state and inserted into the lock hole 8.
2, and either before or after the locking of the above-mentioned upper locking means is completed, by returning the operating lever 87 to the state shown in FIG. The tapered portion 85 of the lock pin 86 is wedge-engaged with the receiving member 91 by the elastic force of , and locking by the pair of left and right lower locking means is completed here.

Referring to FIGS. 11 and 12, the operating device 2
7 is shown in detail. seat 92
is supported by a parallel link mechanism 93, and a swivel base 95 having a vertical shaft 94 is rotatably placed on a support base 96. A pair of left and right guide rails 96 are fixed on the swivel base 95. A slide 97 is slidably provided on the rail 96, and the seat 92 is supported on the slide 97 via a pivot.

A hook 99 is pivotally attached to a pivot 98 fixed to a rotating table 95, and the hook 99 can be freely engaged and detached from the parallel link mechanism 93 in the reversed position.
This is done by operating the rod 101 with the operating tool 102 against the force. In this illustrated example, the operating tool 10
By providing the operating lever 103 not only in the front but also in the rear, it can be operated from either the front or rear direction. Additionally, in FIGS. 2 and 3, 104 indicates a swing cylinder.

[0030]

Effects of the Invention The present invention is as described above, and in the present invention according to claim 1, the rear work equipment mounting frame is composed of left and right side plates having mounting portions and a base plate, and the base plate is connected to the rear elevation of the vehicle body. Since it is clamped and fixed by the PTO transmission case, even if a longitudinal load is applied during work, the surface can take the load and prevent damage to the fastener.

According to the second aspect of the present invention, not only the rear elevational surface of the vehicle body but also the rear elevational surface of the hydraulic case can receive the longitudinal load on the surface, thereby making the vehicle even stronger. In the present invention according to claim 3, the auxiliary frame also prevents the car body from cracking.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the overall configuration of an embodiment of the present invention.

FIG. 2 is an elevational side view of an embodiment of the present invention.

FIG. 3 is a plan view of an embodiment of the present invention.

FIG. 4 is a plan view of the lower locking means according to the embodiment of the present invention.

FIG. 5 is a sectional view taken along line AA in FIG. 4;

FIG. 6 is a front view of the upper locking means according to the embodiment of the present invention.

FIG. 7 is a partially sectional side view of FIG. 6;

8 is a side view showing another first example of FIG. 7. FIG.

9 is a side view showing another second example of FIG. 7. FIG.

FIG. 10 is an overall external configuration diagram.

FIG. 11 is a side view of the operating device.

FIG. 12 is an exploded perspective view of the operating device support section.

FIG. 13 is an elevational side view of a conventional example.

[Explanation of symbols]

24 Running vehicle body 26 Hydraulic case 34 PTO transmission case 35 Rear elevation 37 Mounting frame 38 Board 39 Side plate 41 Rear elevation 47 Fasteners 57 Mounting part 58 Mounting part

Claims (3)

[Claims] [Claim 1] A hydraulic case (26) containing a three-point linkage hydraulic actuator in the rear upper part of the traveling vehicle body (24), and a rear work equipment mounting frame (37) fixed to the rear portion of the traveling vehicle body (24). and PTO with built-in PTO transmission (33)
In the work equipment mounting device for a traveling vehicle, which includes a transmission case (34), the rear work equipment mounting frame (37) includes a substrate that faces and is superimposed on the rear elevational surface (35) of the traveling vehicle body (24). (38), and a transmission shaft (36) interlocked with the transmission (33) in the PTO transmission case (34) is attached to this board (38).
A window (40) is formed through which the window (40) is inserted back and forth.
0) and the peripheral surface (4) of the PTO transmission case (34).
5) to form the rear elevational surface (35) of the traveling vehicle body (24) and P.
A fastener (24), (38), and (34) that clamps the board (38) with the TO transmission case (34) and fastens the three parts (24), (38), and (34) together.
47), and the board (38) includes left and right side plates (39) (39) located on both left and right sides of the PTO transmission case (34).
) projecting rearwardly, the left and right side plates (39) (39) are connected to each other and have attachment parts (57) (58) for the rear working machine (23). Vehicle work equipment attachment device. [Claim 2] The substrate (3) of the rear work equipment mounting frame (37)
8) is polymerized so as to face the rear elevations (35) and (41) of the vehicle body (24) and the hydraulic case (26), according to claim 1. Device. [Claim 3] An auxiliary frame (61) long in the longitudinal direction is fixed to the lower left and right sides of the traveling vehicle body (24), and the rear part of this auxiliary frame (61) is connected to the front lower part of the rear mounting frame (37). 2. The working machine mounting device for a traveling vehicle according to claim 1, wherein: