JPH11308902A - Tractor of traveling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tractor of a traveling vehicle improving durability of a tractor device, etc., and exhibiting an effect as a reinforcement of a provided frame. SOLUTION: This tractor of a traveling vehicle has a right and left pair of controlling part materials 15 restricting the right and left swinging critical positions of a tractor device 5 at right and left sides of the tractor device 5 in right and left swingably connected to a vehicle body side of a traveling vehicle through a vertical bearing shaft 11 and the controlling part material 15 has a restricting plane 18 along a side face of the tractor device 5 in a swinging state to be brought into contact with a face of the tractor device 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawbar type traction device provided on a traveling vehicle such as a tractor.

[0002]

2. Description of the Related Art As a traction device for a traveling vehicle such as a tractor, there is a drawbar type traction device shown in FIG. 5, and this traction device 33 mounts a mounting frame 34 on a rear portion of a transmission case 32 of the tractor. The front end of a long plate-like traction tool (draw bar) 35 is connected to the front side of the frame 34 via a vertical support shaft 36 so as to be swingable left and right. The rear end protrudes rearward from the mounting frame 34 and forms a connection hole 37 that allows connection of a towed tool such as a working machine.

The mounting frame 34 includes left and right side members 38,
The upper and lower front support members 39 and 40 connecting the front ends of the left and right side members 38 and the upper and lower rear support members 41 and 42 connecting the rear ends of the left and right side members 38 form a frame. Are inserted between the upper and lower support members and the left and right side members 38 back and forth, and the front support members 39 and 40
Are vertically penetrated to pivotally support the front end of the traction tool 35.

[0004] Further, the traction tool 35 includes left and right side members 38.
Opening 4 formed by the rear support members 41 and 42
3 and swings left and right.
Inside the left and right side members 38, a regulating member 45 for regulating the lateral swing limit of the traction tool 35 is provided.

[0005]

The conventional traction device 3 described above.
In 3, since the regulating member 45 made of a flat plate material is disposed along the front-rear direction, when the towing tool 35 is swung to the swing limit, the towing tool 35 comes into contact with the corner of the regulating member 45,
Due to this line contact, a large stress is applied to one point of the traction tool 35 and the restricting member 45, which causes wear and damage and lowers the durability.

Further, in the above-described towing device 33, there is a case where the load on the front side of the working machine or the like is borne in addition to simply towing the working machine or the like. The rear support member 42 receives a load from the traction tool 35, and at this time, the regulating member 45 has a role of reinforcing the rear support member 42. However, the left and right regulating members 45 are arranged with a wide left and right interval in order to secure the swinging amount of the traction tool 35, and therefore, the effect of reinforcing the regulating members 45 is small, and to compensate for this. At present, the strength is ensured by forming the lower rear support member 42 to have a large thickness.

Accordingly, the present invention has been made in view of the above problems,
An object of the present invention is to provide a towing device for a traveling vehicle that can improve the durability of a towing device or the like and can exert an effect of reinforcing a mounting frame.

[0008]

The present invention employs the following technical means to achieve the above object. That is, the towing device according to the present invention includes a towing device capable of connecting a towed device such as a working machine at one end, and the other end of the towing device is vertically supported on the vehicle body side of the traveling vehicle. A towing device for a traveling vehicle that is connected to be able to swing left and right through, comprising a pair of left and right regulating members for setting the left and right swing limit positions of the towing device on the left and right sides of the towing device, The restricting member is provided with a restricting surface along a side surface of the swinging traction tool so as to make surface contact with the traction tool.

According to this, even when the traction tool is rocked and comes into contact with the regulating surface of the regulating member, the two surfaces come into contact with each other to suppress the generation of excessive stress, and prevent the damage and abrasion thereof. An improvement in durability can be expected. In such a regulating member, it is preferable that the left and right regulating surfaces are arranged in a C-shape in plan view so that the interval between the left and right regulating surfaces is narrow on the swing fulcrum side and wide on the anti-oscillation fulcrum side. The above effects can be easily obtained.

[0010] The restricting member of the traction device according to the present invention is provided on a mounting frame that is inserted into the middle part in the longitudinal direction of the traction tool so as to be able to swing left and right. There is provided a support member having lower edges connected to each other, and the regulating member is provided in a range extending substantially in the front-rear width of the support member. by this,
Even when the load of the working machine or the like is borne by the support member via the traction tool, the reinforcing effect by the regulating member increases without taking measures to increase the thickness of the support member, and as described above. By arranging the regulating members in a C-shape and narrowing the left-right spacing of the regulating surface on the side of the swing fulcrum, the reinforcing effect of the supporting member is further increased.

[0011] Further, the restricting member of the traction device according to the present invention comprises a left-right inclined contact portion provided with the restricting surface, and an extending portion bent from the end of the contact portion outward in the left-right direction. Thus, the strength of the regulating member itself is improved in addition to the enhancement of the reinforcing effect on the support member and the like.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a rear portion of a tractor 1 as a traveling vehicle, and a traction device 3 according to the present invention is mounted on a lower rear portion of a transmission case 2 constituting a vehicle body of the tractor 1. A tow-type working machine or the like is mounted via the.

In this specification, the traveling direction (towing direction) of the tractor 1 and the like is referred to as the front-rear direction, and the lateral direction perpendicular to the traveling direction is referred to as the left-right direction. As shown in FIGS. 1 and 2, the traction device 3 is a so-called drawbar type,
The mounting frame 4 includes a traction device 5 provided to be able to swing left and right on the mounting frame 4. The mounting frame 4 includes left and right members 6 extending in the front-rear direction, and left and right members 6. An upper support member 7 for connecting the upper edges of the left and right members, a front lower support member 8 for connecting the front lower edges of the left and right members 6, and a rear lower support member 9 for connecting the rear lower edges of the left and right members 6 are provided. The left and right sides of the mounting frame 4 are detachably mounted on the transmission case 2 via the bracket 10.

The left and right side members 6 and the upper support member 7 are integrally formed by bending a flat plate material, thereby reducing the number of parts and simplifying the manufacture. 4 so as to cover the entire upper surface. The traction tool 5 is formed of a long plate material, and the left and right members 6
And the upper and lower support members 7, 8, 9 in the front-rear direction.
And a connecting pin for connecting a towed device 12 such as a working machine to a rear end thereof while projecting rearward from the mounting frame 4 at the rear side of the towing device 5. Are formed in the connection hole 13 through which the holes are inserted.

A support shaft 11 is provided between the upper support member 7 and the lower support member 9 on the rear side and inside the left and right members 6 in the left-right direction.
There is provided a left and right regulating member 15 for setting the left and right swing limit position of the traction tool 5 with the fulcrum as a fulcrum. This regulating member 15
Has an abutting portion 16 with which the side surface of the towing device 5 abuts when the towing device 5 is swung left and right, and an extending portion 17 which is bent outward from the rear end of the abutting portion 16 in the left-right direction. The upper end and the lower end of the regulating member 15 are fixed to the upper support member 7 and the lower support member 9 on the rear side by welding or the like.
The outer end of the extending portion 17 is fixed to the left and right members 6 by welding or the like.

The contact portion 16 is disposed so as to be inclined left and right along the side surface of the swinging traction tool 5.
A regulating surface 18 in which the left and right inner surfaces of the 6 are in surface contact with the side surface of the traction device
It has been. The lower supporting member 9 and the upper supporting member 7 on the rear side have through holes 19L, 19M, 19R penetrating vertically.
Are formed at three places in the left-right direction.
L, 19M, and 19R are configured such that a vibration-preventing pin 20 is detachably attached thereto.

That is, when the traction tool 5 is positioned in the front-rear direction and the oscillating pin 20 is inserted into the left and right insertion holes 19L, 19R, the pins 19L, 19R regulate the left-right swing of the traction tool 5. Tractor 1
Can be connected at the left and right center positions. Also,
When the traction tool 5 is swung left or right to come into contact with the regulating member 15 and the swing pin 20 is inserted into the center insertion hole 19M,
The traction tool 5 is held between the vibration-preventing pin 20 and the regulating member 15, so that the working machine or the like to be pulled can be connected to the tractor 1 in a state of being offset left and right.

In the towing device 3, when the towing device 5 is swung right and left, the towing device 5 and the regulating member 15 come into surface contact with each other. As a result, damage, wear and the like are prevented. When a load such as a work machine is applied to the towing device 3, the lower support member 9 on the rear side mainly bears the load. Since it is provided in the range over the width, the effect of reinforcing the lower support member 9 is great, and the contact portions 16 of the left and right regulating members 15 are disposed in a slanted left and right direction so that the front side (swinging). Since the left-right distance of the fulcrum side is narrow, the strength of the lower support member 9 increases without taking measures to increase the plate thickness of the lower support member 9.

Further, since the upper side of the mounting frame 3 is closed by the upper support member 7, intrusion of mud or the like from above into the frame 3 is prevented, and the traction tool 5 is clogged with mud. The lower support members 8 and 9 are provided to be separated from each other in the front and rear direction, and the lower part of the mounting frame 3 is open. Even if mud or the like invades, it is easy to drain down.

The present invention is not limited to the above embodiment, and can be appropriately designed and changed. For example, as the regulating member 15,
As shown in FIG. 4 (a), the extension portion 17 may be omitted in shape, or as shown in FIG. 4 (b), the extension portion 17 may extend from the front and rear ends of the contact portion 16 to the left and right sides. Alternatively, as shown in FIG. 3C, the regulating member 15 may be formed in a trapezoidal block shape in plan view. In addition, the upper support member 7 can be configured such that the upper part of the mounting frame 3 is opened at the front and rear similarly to the lower support members 8 and 9.

Further, the connecting portion at the rear end of the traction tool 5 may be formed in a bifurcated upper and lower shape.

[0022]

As described in detail above, according to the present invention,
Since the towing device and the restricting member for setting the left and right swing limit of the towing device are in surface contact, wear and damage of both can be prevented, and the durability is improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional plan view of a main part according to an embodiment of the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a rear side view of a traveling vehicle equipped with the traction device of the present invention.

FIG. 4 is a partial cross-sectional plan view of a main part showing another embodiment of the present invention.

5A and 5B show a conventional technique, in which FIG.
(B) is a partial cross-sectional plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running vehicle 3 Traction device 4 Mounting frame 5 Traction tool 15 Regulator 18 Regulatory surface

Claims (4)

[Claims] A traction device is provided at one end thereof to which a traction device such as a work machine can be connected, and the other end of the traction device is swung to the vehicle body side of a traveling vehicle via a vertical support shaft. A traction device for a traveling vehicle that is movably connected, comprising a pair of left and right regulating members for setting a left-right swing limit position of the towing device on the left and right sides of the towing device,
A towing device for a traveling vehicle, comprising: a regulating surface along a side surface of a swinging towing device so as to make surface contact with the towing device. 2. The right and left regulating member is arranged in a C-shape in plan view so that the lateral distance between the regulating surfaces is narrow on the swing fulcrum side and wide on the anti-oscillation fulcrum side. Item 1. A traction device for a traveling vehicle according to item 1. 3. The restricting member is provided on a mounting frame that penetrates a middle part in the longitudinal direction of the traction tool so as to swing left and right, and the mounting frame connects lower edges of the left and right restricting members to each other. 3. The traction device for a traveling vehicle according to claim 1, further comprising a support member that is provided, and wherein the restriction member is provided in a range that substantially covers the front-rear width of the support member. 4. 4. The control device according to claim 1, wherein the restricting member includes a left-right inclined contact portion having the restricting surface, and an extending portion bent outward in the left-right direction from an end of the contact portion. The traction device for a traveling vehicle according to any one of claims 1 to 3, wherein: