JPH0417643Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a loader attachment/detachment device for a tractor that mechanically attaches/detachs a loader to/from the tractor while driving the tractor.

(Prior Art) A conventional device for attaching and detaching a loader to a tractor of this type includes a device described in Japanese Utility Model Publication No. 60-29502.

(Problems to be Solved by the Invention) In the above-described conventional loader attachment/detachment device for a tractor, the fixing pin that connects the loader to the tractor is manually inserted and removed.

Therefore, when attaching or detaching a loader to a tractor, an operator can drive the tractor and mechanically engage and detach the front and rear ends of the frame with side arms of the loader from the front and rear brackets, respectively. In this case, in order to insert or remove the fixing pin that connects the loader to the tractor, the operator must get out of the driver's seat of the tractor, go to the fixing pin, and operate it.

Therefore, there is a problem in that the operation of the fixing pin is troublesome and inconvenient for work.

(Means for solving the problem) This invention solves the above problem by allowing the operator to attach and fix the loader to the tractor without getting out of the driver's seat of the tractor, or to separate them. At the lower center of the rear end of the vehicle body 1 of the tractor a, a lower hitch 3 with an engaging groove 15 extending diagonally backward and upward is installed, and an upper hit 6 with a groove 5 extending rearward is installed in the upper center. , and the upper hitch 6 has a rear tip hook 8.
The base of the operating hook 9, which has the tip edge 7 of the tip hanging piece 8 tilted forward and downward, is pivoted by a shaft 10, and the operating hook 9 is pulled downward by a spring 11. The wire 12 whose base end is connected to the operating hook 9 is supported by a receiver 18 on the vehicle body 1, and the operation knob 13 provided at the tip of the wire 12 is positioned near the driver's seat 14 of the tractor a. An upper horizontal shaft 4 is installed between the upper and lower parts of both frames 2 of the loader b, and a lower horizontal shaft 19 is installed in the lower part of the loader b. The upper horizontal shafts 4 are removably fitted into the grooves 5 of the upper hitch 6, and the upper horizontal shafts 4 are locked by the end hooks 8 of the operating hooks 9 to constitute a loader attachment/detaching device to the tractor. .

(Function) When attaching loader b to tractor a, a worker sits in the driver's seat 14 of tractor a, starts operating tractor a, and uses the pressure oil to load the lower hitch 3 of tractor a. After hooking the lower horizontal shaft 19 of the frame 2 of the loader b, if the frame 2 is rotated toward the tractor a using the lower horizontal shaft 19 as a fulcrum, the upper horizontal shaft 4 of the frame 2 will be attached to the tip edge of the hook 9. 7, the upper horizontal shaft 4 slides on the inclined tip edge 7 of the hook 9, and the frame 2 continues to rotate while the hook 9 rotates upward about the shaft 10 as a fulcrum. .

Thus, the upper horizontal shaft 4 is the end hanging piece 8 of the hook 9.
When the hook 9 passes through and enters the concave groove 5 of the upper hitch 6, the hook 9 rotates downward about the shaft 10, and as shown by the solid line in FIG.
is hooked on the upper horizontal shaft 4, the upper horizontal shaft 4 is held by the upper hitch 6 and the hook 9, and the upper horizontal shaft 4 is fixed to the upper hitch 6, so that the loader b is coupled to the tractor a.

On the other hand, when removing loader b from tractor a, the operator must
4 while sitting on the wire 12 using the knob 13.
When the hook 9 is pulled, the hook 9 rotates upward about the shaft 10 from the state shown by the solid line in FIG. 4, and the groove 5 of the upper hitch 6 is in the open state. Become.

Therefore, using pressure oil from tractor a, loader b
When operated in the opposite manner to the above, the upper horizontal shaft 4 of the frame 2 of loader b is detached from the groove 5 of the upper hitch 6, and then the frame 2 descends to the ground, and the lower horizontal shaft 4 of the frame 2 of loader b is removed from the groove 5 of the upper hitch 6. The shaft 19 comes off the lower hitch 3 and the loader b separates from the tractor a.

(Embodiment) To explain the structure of an embodiment of this invention shown in the drawings, a indicates a tractor, 1 indicates the vehicle body, and 3 indicates a hook-shaped lower part fixed to the center of the rear end of the lower surface of the vehicle body 1. The lower hitch 3 is formed with an engagement groove 15 extending diagonally backward and upward. 6
is an upper hitch fixed to the center of the upper part of the rear surface of the vehicle body 1, and a groove 5 having a trapezoidal cross section that extends toward the rear and widens at the rear is formed at the rear of the upper hitch. Reference numeral 9 denotes an operating hook in which the tip hook 8 at the rear points downward, and the upper edge of the tip is connected by a horizontal plate, and the tip edge 7 of the tip hook 8 has a slightly convex arc shape and extends forward and downward. In the inclined state, the inner edges are formed in a convex arc shape slightly rearward, and the operating hook 9 is fitted into the upper hitch 6, and its base is pivotally connected to the upper hitch 6 by the shaft rod 10, and the operating hook 9 is Spring 11 connects the middle part of hook 9
The release 16, which is stretched downward by the wire 12 and has the proximal end of the wire 12 connected to its tip, is supported by the receivers 17 and 18 on one side of the vehicle body 1, and the operating knob 13 provided at the tip of the wire 12 is supported by the receivers 17 and 18 on one side of the vehicle body 1. It is located near the driver's seat 14 of the tractor a.

b shows a loader of a working machine that is removably attached to the rear of the tractor a; 2 is a T-shaped double-sided frame when viewed from the side of the loader b; The horizontal shafts 19 are respectively constructed. Reference numeral 20 denotes a lift arm, and both ends of a link 22 are pivotally connected to the intermediate support 21 and the upper end of the frame 2 by pins 23 and 24, respectively. 25 is a lift cylinder, the tip of which piston rod 26 is pivotally connected to the rear lower end of the frame 2 by a pin 27;
The other end of the link 29, which is pivoted to the rear end by a pin 28, is pivoted to the rear end by a pin 30. Although not shown, the pressure oil generator and lift cylinder 2 of tractor a
5 are connected to each other by detachable hoses 31 and 32, respectively. Reference numeral 33 denotes a bucket-like working device that is detachably attached to the tip of the other arm of the lift arm 20.

Next, its effect will be explained.

When installing loader b on tractor a, (1) an operator sits in the driver's seat 14 of tractor a;
The tractor a is appropriately moved backward from the state shown in FIG. 2, and the rear edge of the lower hitch 3 is brought into contact with the lower horizontal shaft 19 of the loader b.

(2) Connect the hoses 31 and 32 of tractor a and loader b, respectively.

(3) When pressure oil is supplied into the lift cylinder 25 from the hose 31 and the lift cylinder 25 is moved forward, the link 29 rotates counterclockwise in FIG. The attached lift arm 20 is supported by a link 22 and rotates clockwise in FIG. 2 about a pin 30 as a fulcrum.
The other arm of the lift arm 20 with the working device 33 stands up one after another, and the frame 2 of the loader b rotates counterclockwise in FIG. groove 15
engage within.

After that, the frame 2 of loader b is moved to the lower horizontal axis 1.
Rotate counterclockwise in FIG. 2 using 9 as a fulcrum.

(4) Next, the upper horizontal shaft 4 of the frame 2 is connected to the hook 9.
After hitting the tip edge 7 of the hook 9, its upper horizontal shaft 4 slides on the inclined tip edge 7 of the hook 9, and the hook 9
The frame 2 continues to rotate while rotating upward about the shaft rod 10 as a fulcrum against the elasticity of the spring 11.

(5) When the upper horizontal shaft 4 passes through the end hanging piece 8 of the hook 9 and enters the concave groove 5 of the upper hitch 6, the hook 9 rotates downward using the shaft rod 10 as a fulcrum due to the elasticity of the spring 11. As shown by the solid line in FIG. 4, the end hanging piece 8 of the hook 9 is hooked on the upper horizontal shaft 4, and the upper horizontal shaft 4 is held by the upper hitch 6 and the hook 9, and the upper horizontal shaft 4 is attached to the upper horizontal shaft 4. A loader b is mechanically attached to a tractor a as shown in FIG.

On the other hand, when removing loader b from the state where loader b is attached to tractor a as shown in Fig. 1, (1) an operator sits in the driver's seat 14 of tractor a;
First, the tip of the hook 9 is pulled up by pulling the wire 12 using the knob 13, and the hook 9 is rotated upward from the state shown by the solid line in FIG. 4 using the shaft rod 10 as a fulcrum against the elasticity of the spring 11. The groove 5 of the upper hitch 6 is opened as shown by the chain line in FIG.

(2) Next, when pressure oil is supplied into the lift cylinder 25 from the hose 32 and the lift cylinder 25 is moved backward, the link 29 rotates clockwise in FIG. 33
The lift arm 20 is supported by a link 22 and rotates counterclockwise in FIG. 1 about a pin 30 as a fulcrum. Accordingly, the frame 2 rotates clockwise in FIG.
It detaches from the groove 5 rearward.

(3) After that, as shown in Fig. 2, after the rear end of the frame 2 touches the ground, the frame 2 rotates clockwise in Fig. 2 using the rear end grounding part as a fulcrum, and the lower horizontal shaft 19 reaches the lower hitch. It detaches upward from the groove 15 of No. 3.

(4) Hose 3 connecting tractor a and loader b
Separate 1 and 32, respectively.

(5) When tractor a is moved forward, loader b separates from tractor a as shown in FIG.

Note that if the upper and lower hits 6, 3 are provided above and below the center of the front end of the vehicle body 1 of the tractor a and the loader b is attached thereto, the loader b can be made into a front loader.

(Effects of the invention) The device for attaching and detaching a loader to a tractor according to this invention has the following remarkable effects.

(1) When installing a loader on a tractor, the operator should sit in the driver's seat of the tractor and operate the tractor's pressure oil appropriately, and the operating hook will automatically operate and the loader will be mechanically attached to the tractor. On the other hand, to remove the loader from the tractor, the operator sits in the driver's seat of the tractor, operates the operating knob, and rotates the operating hook upward to open the groove in the upper hitch. After that, if the tractor's pressure oil is operated appropriately, the loader will separate from the tractor.

Therefore, when attaching or detaching the loader to the tractor,
The operator does not have to get out of the tractor driver's seat like in the past, and can attach and detach the loader to and from the tractor while sitting in the tractor driver's seat, making operations easy and quick, saving labor and time. It is possible and useful in practice.

This is particularly effective for tractors with a cabin.

(2) When the loader is not in use, the entire loader is removed from the tractor, leaving only the hitches for attaching the loader at the top and bottom of the center of the end of the vehicle body. There will be no hindrance to work.

(3) It has a simple structure, can be manufactured easily and inexpensively, operates light and smoothly, and is firmly fixed.

[Brief explanation of the drawing]

FIG. 1 is a side view, partially cut away, of a loader according to an embodiment of the invention attached to the rear of a tractor. FIG. 2 is a side view of the loader removed from the tractor, with a portion cut away. FIG. 3 is an exploded plan view of the main parts for attaching the loader to the tractor, FIG. 4 is an enlarged side view of the upper hitch, and FIG. 5 is a perspective view of the main parts. a...Tractor, b...Loader, 1...Vehicle body,
2... Frame, 3... Lower hitch, 4... Upper horizontal axis, 5... Concave groove, 6... Upper hitch, 7... Tip edge, 8... Tip hanging piece, 9... Operating hook, 1
0... Axis rod, 11... Spring, 12... Wire, 13... Operation knob, 14... Driver's seat, 15
... Engagement groove, 18 ... Receiver, 19 ... Lower horizontal shaft.

Claims (1)

[Scope of utility model registration request] At the lower center of the rear end of the tractor's body, a lower hit with an engaging groove that goes diagonally backward and upward is installed, and an upper hit with an engaging groove that goes rearward is installed at the upper center. The base of the operating hook is pivoted by a shaft rod, and the tip of the tip of the tip of the hook is directed downward, and the tip of the tip of the tip of the hook is tilted forward and downward, and the operating hook is tensioned downward by a spring. A wire whose base end is connected to the operating hook is supported by a receiver on the vehicle body, and the operating knob provided at the tip of the wire is located near the driver's seat of the tractor, and is inserted between the upper parts of both frames of the loader. An upper horizontal shaft and a lower horizontal shaft are installed in the lower part, respectively, and the lower horizontal shaft of the loader is installed in the engagement groove of the lower hitch, and the upper horizontal shaft of the loader is installed in the groove of the upper hitch. A loader attachment/detachment device for a tractor, in which the upper horizontal shaft of the loader can be fitted to the tractor, and the upper horizontal shaft thereof is locked by a hook at the end of the operating hook.