JPH0285425A - Vehicle work equipment attachment device - Google Patents

Abstract

PURPOSE:To simplify operation by fitting taperingly an under fitting part on the working machine side in the removable state from above at an under bearing fitting on the body side as well as actuating the operating lever of a lock means so as to be engaged. CONSTITUTION:A pair of right and left under fitting parts 56 provided at the frame side of a working machine are taperingly fitted at a pair of right and left under bearing fittings 40 provided backward on the side of a body 1. The operating lever 64 of an under lock means 57 is rotated to move a lock rod 61 slidably forward from the receding position (non-engaging direction) by means of a spring 62 and an inclined engaging part 60 at the tip is engaged with the bottom face side of the under bearing fitting 40 so as to be mounted. Lock operation can be thus simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a work equipment mounting device for a vehicle, and is used, for example, to detachably mount a backhoe to the rear of a tractor.

(Prior art) As a technology for removably attaching a working machine such as a hack hoe to the rear of a vehicle such as a tractor, a metal fitting is installed between a pair of left and right running bodies at the rear of the vehicle body for the upper support and the metal fitting for the left and right lower support. The machine frame side of the work machine is equipped with one fitting part and a pair of left and right upper fitting parts, and the upper fitting part is attached to the upper receiver and the lower receiver is attached to the fitting. Some devices are equipped with a lower locking means and a lower locking means, which are tapered and removably fitted from the upper side, and the upper and upper fitting portions are connected to the metal fitting.

(Problem to be Solved by the Invention) In the conventional technology, a wedge bolt is used as a pair of left and right lower locking means, and by tightening this wedge bolt I from the rear side, the fitting part is secured to the metal fitting. The wedge bolts are tightened and locked, making it extremely troublesome to operate the wedge bolts when attaching or detaching the work equipment.

In other words, the machine frame of the work equipment is located close to the rear of the vehicle body,
Moreover, since the rear wheels (traveling bodies) are located on both the left and right sides of the mounting device, the pair of left and right lower locking means are in a narrow position and are extremely difficult to operate. Operating the bolt was very cumbersome.

The present invention has been provided in view of the above-mentioned problems in the prior art, with the object of making it possible to easily operate the lower locking means.

(Means for Solving the Problems) The present invention provides for a vehicle between a pair of left and right running bodies 4 at the rear of a vehicle body 1.
The first receiver has a metal fitting 44, and the pair of left and right lower supports have metal fittings 40,
The machine frame 21 side of the working machine 20 is provided with an earth-acid fitting part 50 and a pair of lower fitting parts 56 on the left and right, -] The upper fitting part 0 is connected to the metal fitting 44, and the lower fitting part 56 is connected to the lower receiving part. The metal fittings 40 are tapered and removably fitted from the upper side, respectively, and these upper and lower mating parts 50.56 are connected to the metal fittings 44.4 of the second and lower supports 4.
In order to achieve the stated purpose, the following technical measures are taken in a working machine mounting device for a vehicle which is equipped with an upper locking means 53 and a lower locking means 57 that lock at zero.

That is, in the present invention, the pair of left and right lower locking means 57 are
A lock rod 61 is provided on the machine frame 21 side so as to be slidable back and forth so that the inclined engagement portion 60 at the tip engages with the metal fitting 40 from the bottom side, and the lock rod 61 is connected to the metal fitting 40 from the bottom side. 40
It is equipped with a spring 62 that urges the spring 62 to the side, and an operating lever 64 that operates the lock rod 61 in the disengagement direction against the spring 62. A cam member 63 that acts as a cam when operated in the disengagement direction.
It is characterized by being provided with.

(Function) When locking with the lower locking means 57, the lower mating portion 56
After fitting the lower receiver into the metal fitting 40 from above, the operation lever 64 is rotated from position 73 to position 72.

Then, the locking rod 61 slides forward from the retracted position by the spring 62, and the inclined retaining portion 60 at the tip engages the lower holder with the metal fitting 40.
(See Figure 1).

As a result, the lower mounting portion 56 is locked so that the lower support cannot be separated from the metal fitting 40.

To release the lock, rotate the operating lever 64 backward from position 72 to position 73. The cam member 63 is rotated and the cam action moves the locking rod 61 against the spring 62 to the retracted position (non-retracted position). (in the engagement direction).

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 6, reference numeral 1 denotes a tractor body, which is composed of an engine, a transmission case 2, etc., and has a pair of left and right front wheels 3 and rear wheels 4, and the front and rear wheels are running bodies.

5 is the bonnet, 6 is the driver's seat, 7 is the control handle,
The driver's seat 6 can change its position between a forward facing position and a backward facing position, and is provided on a hydraulic device 9 for lifting and lowering a work machine, which has a pair of left and right lift arms 8.

Reference numeral 10 denotes a front loader, which is mounted on the front part of the tractor body 1. The loader 10 includes a pair of left and right squares 1, and a pair of left and right places 12 protruding forward from each mast 11.
, a pair of left and right booms 1 pivotally attached to the top of each mast 11
3. Boom cylinder 1 for raising and lowering each boom 13
4. A packet 15 pivotally attached to the tip of the boom 13, a bucket sill 16 for rotating the bucket eye 5, etc. are provided.

Each mast 11 has a pair of left and right reinforcing frames 17 provided along the longitudinal direction of the tractor body 1, and the mast is mounted on a stand 1.
8, and the front end of each place 12 is removably attached to a front axle frame 19 that projects forward from both sides of the engine.

20 is a backhoe (working machine), which is detachably attached to the rear of the tractor body 1;
These include a machine frame 21, a swivel base 23 pivotally attached to the machine frame 21 so as to be rotatable around a vertical rotation axis 22, a boom 25 pivotally attached to the swivel base 23 with a pin 24, and the boom 25. an arm 27 pivotally attached to the tip of the boom 25; an arm cylinder 28 for bending and extending the arm 27; a bucket 29 pivotally attached to the tip of the arm 28; Huggett cylinder 30 for moving. It comprises a control box 31 provided on the machine frame 21'2, a pair of left and right outriggers 32, etc.

In FIGS. 4 and 5, reference numeral 33 denotes a mounting frame body fixed to the rear part of the vehicle body 1, and a machine frame (mounting frame) 21 of the backhoe 20 is detachably attached to this mounting frame body 33.

The mounting frame 33 includes a pair of left and right lower brackets 34 and an upper bracket 35, a middle bracket I 36 that connects the upper parts of the left and right lower brackets 34, and a connecting plate 37 that connects the lower parts of the left and right lower brackets 34. have.

The front part of the lower bracket 34 is fixed to the vehicle body J, the front lower part is fixed to the rear end of the reinforcing frame 17 with a pole I, and the rear lower part is fixed to the rear end of the reinforcing frame 17.
It is bent into a single character shape and fixed to the connecting plate 37 with bolts.

A bar 38 is provided on the outside of the rear lower part of each lower bracket 34.
Weld the chevron-shaped support material 39 to the tapered bottom support of the metal fitting 4.
0 is fixed. Note that 41 is a lower link connecting pin.

The upper bracket 35 is fixed to the rear upper part of the vehicle body 1 with bolts through a mounting plate 42 welded to the front end, and the upper bracket 35 has a plurality of top link connecting pin holes 43 in the vertical direction in the front part.

As shown in FIG. 5, the left and right upper brackets 35 are spaced wider at the rear than at the front, and the tapered upper bracket is welded with a valley-shaped support member 45 that forms a metal fitting 44 (see FIG. 4). reference).

The middle bracket 36 has a gate shape when viewed from the rear, and its lower portions on both left and right sides are fixed to the lower bracket 34 with bolts, and the middle bracket 36 also serves as a cover for a PTO shaft 46 protruding from the rear surface of the vehicle body 2.

The mounting frame 21 includes a pair of left and right lower plates 48 from the left and right sides of the lower corner pipe 47 of the pair of upper and lower corner vibrators 47.
is protruded, and a plate 49 is protruded forward from the center portion of the upper corner pipe 47 in the left-right direction.

The projecting end of the upper plate 49 is provided with an upper region joining part 50, this upper region joining part 50 is made of a round bar 51 and a valley-shaped mounting material 52, and the "two supports" can be freely fitted into and removed from the metal fitting 44 from the upper side. The upper locking means 53 is fitted with a bolt 5 that passes through the round bar 51 and the valley-shaped mounting member 52.
4 and a nut 55 provided on the metal fitting 44, into which the bolt 54 is screwed.

The protruding ends of the pair of left and right lower plates 48 are each provided with a dohyo mating part 56, and the dohyo mating part 56 has a lower support that is connected to the metal fittings 40.
The taper is fitted in such a way that it can be freely fitted and removed from the upper side, and
It is locked by the lower locking means 57.

As shown in FIG. 1, the dohyo mating part 56 is formed by a valley-shaped supporting material 58 protruding inwardly, and the lower support is shaped to taper fit into the angular-shaped receiving material 39 of the metal fitting 40 from the -F side. Received material 39
A wedge receiving surface 59 that slopes forward and downward is formed at the lower part of the holder.

As shown in FIGS. 1 to 3, the lower locking means 57 slides back and forth on the machine frame 21 side so that the inclined engagement portion 60 at the tip engages the wedge surface 59 of the lower bracket 40 from the lower surface side. A lock rod 61 that is movably provided, a spring 62 that urges the lock rod 61 toward the metal fitting 40, and a cam that operates the lock rod 61 in the disengagement direction against the spring 62. Member 63
It consists of an operating lever 64 etc. having a

The lock rod 61 is inserted into sliding guides 65 and 66 that protrude from the inside of the lower plate 4H, and a pin (spring pin) 67 is attached to the lock rod 61 in the vertical direction.
The upper and lower cam plates 68, 68 of the cam member 63 are pivotally connected to this pin 67, and the cam surfaces 6 of the upper and lower cam plates 68, 68 are
9 is arranged corresponding to the cam receiving surface 70 of the sliding guide body 65 from the rear side, and the spring 62 is fitted onto the lock rod 61 and provided as a spring between the pin 67 and the guide body 66. It is being

The upper and lower cam plates 68, 68 are connected by a connecting plate 71,
The operating lever 64 is fixed on the upper cam plate 68 with the 67 hidden, and is operated as shown by the arrow 74 between the lock position 72 and the unlock position 73 in FIG. 3 using the pin 67 as the center. If possible and in the lock position 72, the operating lever 64
The axial direction thereof is directed in the front-rear direction, and when in the unlocked position 73 as shown by the arrow 74, it protrudes laterally outward.

In addition, in FIGS. 4 and 5, 75 is a three-point link top link, and 76 is a pair of left and right lower links. When the backhoe 20 is used, the lower links 76 77 and a storage box section 78 on the machine frame 21 side. In addition, 79 is a reinforcing body for the lower plate 48, 80 is a brace, and 81 is an Ara I rigger 32.
The telescopic cylinder 82 is a swing cylinder of the backhoe.

In the two embodiments, the backhoe 20 is attached to the tractor body 1 in the following manner.

That is, since the backhoe 20 normally has a pair of left and right outriggers 32 and a bucket 29 in contact with the ground (fixed), the tractor body 1 is rearwardly moved and the upper and lower regions of the bankhoe 20 are connected. The metal fittings 40.44 of the upper and lower supports of one example of the tractor body are positioned below 50.56.

If the positions on the diagram match, the hydraulic systems on the tractor body 1 side and the backhoe 20 side are connected, and then the cylinder 82 of the outrigger 32 is retracted to lower the machine frame 21.

Then, the upper ring fitting 50.56 of the tractor vehicle body example fits into the metal fitting 40.44 from above.
It is sufficient to lock them with the lower locking means 53 and 57, respectively.

In this case, the operating lever 64 of the lower locking means 57 is at the unlocking position 73, and this position 73 is located at the cam receiving surface 7.
Since the cam surface 69 is held at 0, it is only necessary to rotate the operating lever 64 in the direction opposite to the arrow 74.
As a result, the locking rod 61 is slid forward under the force of the spring 62, and the inclined engagement portion 60 at the tip engages with the wedge surface 59 on the lower surface side of the lower bracket 40, and the lower region engagement portion 56 However, the lower support is locked so that it does not come off from the metal fitting 40.

Therefore, even though the lower locking means 57 is located between the pair of left and right traveling bodies 4, which is a very difficult position to operate, it can be locked by rotating the operating lever 64.

In addition, to release the lock, move the operating lever 64 to the arrow 7.
When operated in four directions, the cam surface 69 of the cam member 63 gradually rides on the cam receiving surface 70, and by retracting the lock rod 61 against the spring 62, the lock can be easily unlocked.

In addition, in the above embodiment, the upper and lower supports are metal fittings 44.4.
0 is chevron-shaped and the upper and lower fitting portions 50.56 are valley-shaped, but the metal fittings 44.40 may be valley-shaped and the fitting portions 50.56 may be chevron-shaped. In addition, the operating lever 6
4 may be provided with a notch or the like to hold it in the unlocked position.

(Effects of the Invention) According to the present invention, the pair of left and right lower locking means are provided so as to be slidable back and forth on the machine frame side such that the inclined engagement portion at the tip engages the lower receiver with the metal fitting from the lower surface side. the locking rod, a spring that urges the locking rod toward the lower bracket, and an operating lever that operates the locking rod in the disengagement direction against the spring; There is a cam member on the side that acts as a cam when the operating lever is operated in the disengagement direction, so the lower lock can be locked even though it is located between the left and right traveling bodies, which is a very difficult position to operate. Locking and unlocking operations can be performed extremely easily.

In particular, when unlocking, the cam action is used, so even if the engagement force of the lock rod is increased by the spring, the lock rod can be easily released.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side sectional view of the lower locking means, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a planar sectional view of FIG. 1. 4 is a side view of the entire mounting device, FIG. 5 is a plan view thereof, and FIG. 6 is a side view of the entire front loader and hack hoe mounted on the tractor. DESCRIPTION OF SYMBOLS 1... Tractor body, 4... Traveling body, 20... Work equipment (backhoe), 21... Machine frame, 40... Lower support is metal fitting, 44... Upper support is metal fitting, 50 ...Earth and acid joint,
53... Upper locking means, 56... Lower region joint, 57.
... Lower locking means, 6o... Engaging portion, 61... Lock rod, 62... Spring, 63... Cam member, 64...
・Operation lever. Patent applicant: Kubota Iron Works Co., Ltd.

Claims (1)

[Claims] (1) An upper support metal fitting (44) and a pair of left and right lower support metal fittings (40) are installed between the pair of left and right running bodies (4) at the rear of the vehicle body (1).
An upper fitting part (50) and a pair of left and right lower fitting parts (56) are provided on the machine frame (21) side of the working machine (20), and the upper fitting part (50) is provided with an upper receiving part. Attach the lower fitting part (5) to the metal fitting (44).
6) into the lower receiving metal fittings (40) from the upper side in a tapered manner so that they can be freely fitted and removed, and these upper and lower fitting parts (56) (56) are fitted into the upper and lower receiving metal fittings (44) and (40). Upper locking means (53) and lower locking means (57)
), the pair of left and right lower locking means (57) are configured such that the inclined engagement portion (60) at the tip engages with the lower receiving metal fitting (40) from the lower surface side. A lock rod (61) provided on the machine frame (21) side so as to be slidable back and forth, a spring (62) that biases this lock rod (61) toward the lower support fitting (40) side, and the spring ( 62)
an operating lever (64) for operating the locking rod (61) in the disengagement direction against the
) side is provided with a cam member (63) that acts as a cam when the operating lever (64) is operated in the non-engaging direction.