JPH0893732A - Turnbuckle - Google Patents

Abstract

(57) [Summary] [Purpose] The main purpose is to facilitate the adjustment of the length of the turnbuckle, and at the same time, consider that the turnbuckle does not grow in a direction orthogonal to the axial direction. [Structure] A first rod 10 and a second rod 11 are arranged so as to face each other with an interval in the axial direction, and a connecting rod 12 is provided to connect them in the axial direction. Both sides of the connecting rod 12 in the axial direction are provided. The male rods 17 and 18 are formed, the first rod 10 and the second rod 11 are formed of a cylindrical body, and the female screws 10a and 11a which are screwed to the male screws 17 and 18 are formed on them, and the axial center of the connecting rod 12 is formed. A rotation stopper member 19, 25 is fixed to a middle portion of the direction, and a sleeve 21 is fitted on the rotation stopper member 19, 25 such that the rotation stopper member 19 and 25 cannot rotate around the axis of the connecting rod 12 and is movable in the axial direction of the connecting rod.
And the sleeve 21 is attached to the first rod 10 or the second rod 11.
A lock member 23 is provided which engages with and disengages by the movement in the axial direction of the connecting rod and restricts the rotation of the sleeve 21 around the axial center of the connecting rod.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turnbuckle used for a lift rod for connecting a lower link of a three-point link mounted on a rear portion of a tractor and a lift arm of a hydraulic device for lifting a working machine. It is a thing.

[0002]

2. Description of the Related Art As a turnbuckle, a first screw shaft,
The first screw shaft and a second screw shaft on which a screw in the opposite direction is formed are separated from each other in the axial direction, and a cylindrical body is provided to connect them, and the inner peripheral surfaces of both ends of the cylindrical body in the axial direction are provided. , Forming a female screw to be screwed to the first screw shaft and the second screw shaft, and rotating the cylindrical body about the shaft center to bring the first screw shaft and the second screw shaft close to each other in the shaft center direction.・ Some of them can be separated to adjust the length.

This turnbuckle is generally
A lock nut is screwed onto the first screw shaft or the second screw shaft, and the lock nut is brought into contact with the cylindrical body so that the rotation of the cylindrical body around the shaft center is restricted.

[0004]

In the above-mentioned conventional one, a tool is required to loosen the lock nut when adjusting the length of the turnbuckle, and the loosening of the lock nut is troublesome. It was Therefore, in view of the above problems, the present invention does not require a tool for length adjustment, and
The main purpose is to provide a turnbuckle that can be easily achieved.

[0005]

The technical means taken by the present invention to achieve the above object are the first rod 10 and the second rod 1.
1 and 2 are arranged so as to face each other with a gap in the axial direction, and are provided with a connecting rod 12 that connects them in the axial direction. By rotating the connecting rod 12 around the axial center, the first rod 10 and the second rod 10 are provided. In a turnbuckle in which a connecting rod 12 is screwed to the first rod 10 and the second rod 11 so that the connecting rod 12 and the first rod 10 approach and separate from each other in the axial direction, a male screw 17 is provided on both sides in the axial direction of the connecting rod 12. 1
8 is formed, the first rod 10 and the second rod 11 are formed of a tubular body, and female screws 10a and 11a that are screwed to the male screws 17 and 18 are formed on these, and a middle portion in the axial direction of the connecting rod 12 is formed. The detent members 19 and 25 are fixed to the
9 and 25 are provided with sleeves 21 which are non-rotatable around the axis of the connecting rod 12 and which are fitted externally so as to be movable in the axial direction of the connecting rod.
The sleeve 2 is engaged with the first rod 10 or the second rod 11 in a detachable manner by the movement of the sleeve 21 in the axial direction of the connecting rod.
The point is that a lock member 23 for restricting the rotation around the connecting rod axis of No. 1 is provided.

[0006]

In order to adjust the length of the turnbuckle, the sleeve 21 is rotated at a position separated from the lock member 23. Then, the connecting rod 12 is connected through the rotation stopping members 19 and 25.
Is rotated about the axis, and the first rod 10 and the second rod 11 approach and separate from each other in the axial direction, and the length is adjusted.

When the length adjustment is completed, the sleeve 21 is moved in the axial direction of the connecting rod and is engaged with the lock member 23. Then, the rotation of the sleeve 21 around the connecting rod axis is restricted,
The length of the turnbuckle is fixed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment, and in FIG.
Reference numeral 1 denotes a mission case that constitutes the rear part of the vehicle body of the tractor, and a hydraulic device 2 for raising and lowering the working machine is mounted on the upper rear part of the mission case 1. A three-point link 3 is provided at the rear of the mission case 1 to connect the working machine in a vertically movable manner.

The three-point link 3 is composed of an upper top link 4 and lower left and right lower links 5, and the front end side of the top link 4 is fixed to a mounting base 6 provided on the rear end face of the mission case 1 by a bracket 7 fixed thereto. The front end sides of the left and right lower links 5 are pivotally attached to the side surfaces of the mission case 1, and the rear end sides of the links 4 and 5 are pivotally attached to the work machine.

Lift arms 8 are provided on both left and right sides of the hydraulic device 2, and a tip end side of the lift arm 8 and a front and rear halfway portion of the lower link 5 are connected by a lift rod 9.
The working machine is raised by rocking the lift arm 8 upward by the hydraulic pressure of the hydraulic device 2, and the working machine is lowered by its own weight when the hydraulic pressure is released. One of the left and right lift rods 9 has a length adjustable by adopting the turnbuckle of the present invention. That is, as shown in FIGS. 1 and 2, the lift rod 9 includes an upper first rod 10 and a lower second rod 11 which is arranged to face the first rod 10 while being axially separated therefrom. These first
It is mainly configured by a connecting rod 12 that connects the rod 10 and the second rod 11.

The first rod 10 and the second rod 11 are composed of a cylindrical body, and a ball joint 13 pivotally connected to the tip of the lift arm 8 via a pin is fixed to the upper end of the first rod 10. A connecting member 14 pivotally connected to the lower link 5 via a pin is fixed to the lower end of the second rod 11. Further, the lower end side of the first rod 10 and the upper end side of the second rod 11 are draw-formed into small diameter portions 10a, 11a, and female threads 15, 16 are formed on the inner peripheral surfaces of the small diameter portions 10a, 11a. The female screw 15 and the second rod 11 of these first rod 10
The female screw 16 and the female screw 16 are formed in directions opposite to each other.

The connecting rod 12 is composed of a round bar (or may be a pipe), and the internal threads 15, 1 are provided on the upper and lower portions of the outer peripheral surface.
6 are formed with male threads 17 and 18, and the first rod 10 and the second rod 11 are moved toward or away from each other in the longitudinal direction of the lift rod by rotating the connecting rod 12 about the axis. The length of the lift rod 9 can be adjusted.

A U-shaped detent member 19 is fixed by a pin 20 to a central portion of the connecting rod 12 in the axial direction, and a square tubular sleeve 21 is connected to the detent member 19.
It is fitted so as to be movable in the axial direction. A notch 22 is formed on the lower end side of the sleeve 21, and a lock pin (lock member) 23 into which the notch 22 is fitted is fixed to the upper part of the second rod 11. A U-shaped handle 24 is fixed to the sleeve 21.

In the above structure, in order to adjust the length of the lift rod 9, as shown in FIG. 1, the handle 24 is grasped at the position where the notch 22 is disengaged from the lock pin 23 to connect the sleeve 21. By rotating around the axis of 12, the connecting rod 12 is rotated around the axis, and the length of the lift rod 9 is adjusted. Then, when the length adjustment of the lift rod 9 is completed, the notch 22 is locked to the lock pin 2
Align with 3 in the circumferential direction of the lift rod,
The sleeve 21 is moved downward. Then, the notch 22 fits into the lock pin 23, the rotation of the sleeve 21 around the axis of the connecting rod is restricted, and the sleeve 21 fits into the rotation stopping member 19, so that the connecting rod 12 rotates. Is also regulated.

FIG. 4 shows another embodiment. Instead of the U-shaped detent member 19 in the one embodiment, a rod-shaped detent member 25 made of a roll pin or a parallel pin is used.
Is fixed by penetrating the connecting rod 12,
Then, the sleeve 21 is fitted so that the anti-rotation member 25 is located in the diagonal direction of the sleeve 21.
This is intended to prevent the rotation of 1 and the connecting rod 12. The other structure is the same as that of the first embodiment.

In the above embodiment, the present invention is applied to the lift rod, but it may be applied to the top link and others. Further, the lock pin 23 may be provided on the first rod 10 and the notch 22 may be formed on the upper portion of the sleeve 21, but in that case, means for restricting the downward movement of the sleeve 21 is required.

[0017]

According to the present invention, male threads 17 and 18 are formed on both sides of the connecting rod 12 in the axial direction, and the first rod 10 and the second rod 11 are formed of a cylindrical body, and the male screw 1 is attached to them.
Female screws 10a and 11a that are screwed to 7 and 18 are formed, and detent members 19 and 25 are fixed to intermediate portions in the axial direction of the connecting rod 12, and the detent members 19 and 25 rotate around the axial center of the connecting rod 12. Is provided with a sleeve 21 which is non-rotatable and which is fitted externally so as to be movable in the axial direction of the connecting rod, and the first rod 10 or the second rod 11 is provided.
Further, since the lock member 23 is provided for restricting the rotation of the sleeve 21 around the axis of the connecting rod by being engaged with the sleeve 21 in a disengageable manner by the movement of the sleeve 21 in the direction of the axis of the connecting rod, the lock nut is provided as in the conventional case. The effect that the length adjustment is easy without the need to relax.

In the conventional turnbuckle structure,
Since the first screw shaft and the second screw shaft are connected by the tubular body, if the rotation stopping member and the sleeve of the present invention are provided in this tubular body, the sleeve is orthogonal to the axial direction of the turnbuckle. It becomes large in the direction, which is not preferable in appearance, and when a handle for gripping the sleeve is provided, the handle largely protrudes, and it is important to avoid interference with surrounding members. , Male threads 17 and 18 are formed on both sides in the axial direction of the connecting rod 12, and the first rod 11
Since the turnbuckle is mainly constituted by forming the second rod 11 and the second rod 11 with a tubular body and forming the female screws 10a and 11a which are screwed to the male screws 17 and 18 on them, even if a sleeve or the like is provided. A compact turnbuckle can be provided in the direction orthogonal to the axial direction.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a main part of one embodiment.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side view of a rear portion of the tractor.

FIG. 4 is a sectional view showing another embodiment.

[Explanation of symbols]

 9 Lift rod 10 1st rod 10a Female screw 11 2nd rod 11a Female screw 12 Connection rod 15 Male screw 16 Male screw 19 Rotation stop member 21 Sleeve 23 Lock pin (lock member) 25 Rotation stop member

Claims (1)

[Claims] 1. A connecting rod (12) for connecting the first rod (10) and the second rod (11) facing each other with an interval in the axial direction, and connecting these in the axial direction. The first rod (10) and the second rod (11) are moved toward and away from each other in the axial direction by the pivoting operation of the rod (12) around the axial center.
A turnbuckle in which a connecting rod (12) is screwed onto a rod (10) and a second rod (11), wherein a male screw (17) is provided on both sides in the axial direction of the connecting rod (12).
(18) is formed, the first rod (10) and the second rod (11) are formed of a cylindrical body, and the male screw (17),
Female screws (10a) and (11a) that are screwed to (18) are formed, and detent members (19) and (25) are fixed to the intermediate portion of the connecting rod (12) in the axial direction. 1
9) and (25) are provided with sleeves (21) which are not rotatable about the axis of the connecting rod (12) and are movably fitted in the axial direction of the connecting rod, and which are provided with the first rod (10) or the second rod. Rod (11)
And a lock member (23) for restricting the rotation of the sleeve (21) around the axis of the connecting rod by being disengageably engaged by the movement of the sleeve (21) in the direction of the axis of the connecting rod. Turnbuckle.