JPH02142914A - Turning coupling device - Google Patents

Abstract

PURPOSE:To keep the straight distance between the certain pints of two materials invariably ever if the coupled two materials turn relatively by comprising two materials turning relatively, gear teeth mutually engaging with the two materials, long holes, vertical shafts movably engaging along each long hole, and retainers. CONSTITUTION:Though the positions mutually engaging at teeth 11, 21 of the connected part are moved to right and left by the relative turning of the both materials 1 and 2, since these engaged positions are always on the same arcs respectively having the turning centers 1a, 2a of the both materials 1, 2 as the center of the each arc, the distance between the engaged position and the turning centers 1a, 2a are always kept constantly. On the basis of the movement of the engaged position of the teeth 11 and 21, the vertical shafts 14, 24 are moved along the long holes 13 and 23, accompanying with the bearings 15, 25 and retainers 31, 32 so that the engaging center of the teeth 11, 21 and the centers of the retainers 31, 32 are positioned on the straight line connecting the turning centers 1a, 2a. Thereby, the vertical refraction and the displacement of the relative height position, and the longitudinal separation of the both materials 1, 2 are prevented at the connected position by the vertical shafts 14, 24 passing through the long holes 13, 23 and the retainers 31, 32.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pivot coupling device that connects two objects so that they can pivot relative to each other without changing the distance between the pivot centers of the two objects.

[Conventional technology]

As a conventional pivot coupling device of this type, for example, the one shown in Fig. 5 (
There are things like those shown in a) [Yes]). That is, one object A and the other object B are pivotally connected by a pivot C, and both objects A in a plane perpendicular to this pivot C.

B is connected so as to be able to turn around the axis C, allowing bending between the two town bodies. Although the objects A and B shown in the figure are shaft-shaped, it goes without saying that this is just an example.

[Problems to be Solved by the Invention] However, according to the prior art, although the overall refraction due to the relative rotation of both objects A and B is performed smoothly, Thus, the distance between points Aa and Ba on both objects A and B, respectively, becomes smaller from the distance before refraction to the distance lLa after refraction. Therefore, according to the conventional technique, problems caused by the change in distance appear in various technical fields to which this pivot coupling device is applied. To illustrate this, firstly, in a vehicle in which objects A and B each form a vehicle body, and these two bodies are connected by a pivot C, the wheelbase becomes smaller during steering, resulting in stable steering. This appears as problems such as decreased performance. Second, object A.

When B is used as a robot arm (manipulator), there is a problem that the arm tip cannot reach the target position because the straight line distance from the base end of the arm to the tip changes due to refraction. There are disadvantages such as the need for a telescopic telescopic structure in order to reach the target position.

In this way, in the conventional rotational coupling device, due to the relative rotation of the two objects connected thereby,
There is a drawback that the straight distance between the points of both town bodies changes, causing various problems.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pivoting coupling device in which the straight distance between the points of the two bodies does not change even if the two objects to be coupled rotate relative to each other.

[Means to solve the problem]

The pivot coupling device of the present invention includes first and second objects that pivot relative to each other, and a plurality of bodies that are formed on both bodies along arcs centered on their respective pivot points and that engage with each other at opposing portions. teeth, elongated holes respectively formed along the arcs in both town bodies, vertical shafts that engage individually with each of the long holes so as to be movable along each of the long holes, and between each longitudinal axis of both town bodies. A retainer that is installed and fixed across is provided, and both town bodies are configured to be relatively rotatable within a plane.

[Effect]

When the first and second objects are rotated relative to each other, the two bodies rotate while changing the meshing positions of the teeth formed along the arc at the opposing portions, and the space between the two bodies is bent. At this time, since many teeth are along an arc centered on the center of rotation of the object on which they are formed, the straight line distance between the center of rotation of the two teeth does not change even if the meshing position changes due to the rotation. .

In addition, since both town bodies are connected by a vertical shaft that engages with an arc-shaped long hole and a retainer that is installed and fixed between each vertical axis, the relative height positions of the opposing parts of both town bodies are always maintained. We will maintain the same structure and prevent separation between the two town bodies.

In this way, the meshing of the teeth prevents the two jaws from coming closer together, and the engagement of the elongated hole with the vertical shaft and the retainer installed and fixed between the vertical shafts allows the vertical positions of the meshing parts of the two jaws to be adjusted. Both town bodies are connected in each direction in order to be determined and to prevent separation of both town bodies.

〔Example] 1 to 4 show embodiments of the invention.

Here, FIGS. 1 and 2 are schematic plan views, in which 1 indicates the first object and 2 indicates the second object, respectively, the center of rotation 1a,
It is assumed that the vehicle rotates around 2a.

Both gears 1.2 are provided with teeth 11.21 which engage with each other at mutually opposite locations, as shown in FIG. 3.4. This tooth 11.21 is provided at each pivot center 1a, 2a at the opposing portion.
A large number of them are formed along an arc centered on , and the two town bodies 1.2 are always in mesh with each other in a part of the arc. The formation of the teeth 11.21 on both the teeth 1.2 is achieved by forming the teeth 11.21 on the block 1, in which the teeth 11.21 are formed individually, as shown in FIGS. 3 and 4.
2° 22, respectively, the upper plank 1 forming part of both bodies 1.2
6a, 26a and the lower thick plates 16b, 26b, the bolts 12a are mounted on the lower surfaces of the upper thick plates 16a, 26a.

22a.

Further, the upper thick plates 16a, 26a and the lower thick plates Fi 16b, 26b of both town bodies 1.2 have elongated holes 13.
23 are respectively formed through which the longitudinal shafts 14, 24 are engaged. Vertical axis 14.24 and long holes 13, 23
A rolling bearing 15.25 is interposed between the vertical shaft 14.24 and the vertical shaft 14.24, and the vertical shaft 14.24 is movable along the elongated holes 13, 23 by means of the bearings 15,25. The outer diameter of the outer ring of the bearing 15.25 is slightly smaller than the width of the long holes 13 and 23.

The upper ends of the vertical shafts 14.24 are fixed to a plate-shaped retainer 31, and the lower ends of the vertical shafts 14.24 are also fixed to a plate-shaped retainer 32. These fixations are achieved by the fitting force between the two and the end face of the longitudinal shaft 14.24 and the retainer 31.32.
This is achieved by a fixing force via the discs 14a, 24a fixed to the

Note that sliding washers 18a, 28a fixed to the upper thick plates 16a, 26a are interposed between the upper surfaces of the upper thick plates 16a, 26a and the lower surface of the retainer 31 at the outer periphery of the vertical axis 14°24. Thick plates 16b, 26b and retainer 32
There are also sliding washers 18b and 28 symmetrically vertically with respect to the above.
b is mediated.

Next, the operation of this pivot coupling device will be explained.

Figure 1 shows the Ryocho body 1. 2 are connected in a straight line, and FIG. 2 shows a state in which both the town bodies 1.2 are relatively rotated and bent. Turning center 1 when in a straight line state in Figure 1
The distance JilL between a and 2a is maintained even in the refracted state shown in FIG. In other words, due to the relative rotation of the two jaws 1.2, the mutually meshing position of the joint teeth 11°21 moves from side to side.
Since they are always on the same arc centered on the pivot centers 1a and 2a, the distance between the meshing position and the pivot centers 1a and 2a is always maintained the same. Therefore, the turning center la, 2a
The straight line distance between them is always the same.

Based on the movement of the meshing position of said teeth 11.21, the longitudinal axis 1
4.24 moves along the elongated holes 13 and 23 with bearings 15 and 25 and retainers 31 and 32, and moves to the center of rotation 1.
The meshing center of the teeth 11.degree. 21 and the center of the retainer 31.32 are located on the straight line connecting the points a and 2a.

Here the longitudinal axis 14. passes through the elongated hole 13.23.
24, and upper planks 16a, 26a fixed thereto.
and the retainer 3 in sliding contact with the lower thick plates 16b and 26b.
According to 1.32, Ryochotai 1.2 is at the joint position,
Vertical bending, deviation in relative height position, and separation back and forth are prevented.

Incidentally, although a total of four vertical axes 14 and 24 are used, two each, the number can be increased or decreased as appropriate. In addition, the upper planks 15a, 26a and the lower planks 16b, 26b are part of the object 1.2, and the vertical axis 14.24 is passed through them, but if the planks were even thicker, , this may be one sheet. In this case, the blocks 12.22 of the teeth 11.21 are embedded in grooves formed in the wall thickness of the plank so that the teeth 11.21 mesh with each other by protruding oppositely. Become.

Said Ryocho body 1. 2, the front body and the rear body of a construction machine, or members fixed therebetween, can be used as joints for various objects that are connected to each other. When used as a coupling device for front and rear vehicle bodies, the turning centers 1a and 2a are set at the widthwise center of the front and rear wheel axles to maintain the same wheelbase of the vehicle when traveling straight and when turning. can do.

〔Effect of the invention〕

As explained above, in the pivoting connection device of the present invention, even if the two objects to be coupled rotate relative to each other, the straight line distance between the points forming the two bodies can be maintained the same as before the pivoting. Therefore, it can be widely applied as a coupling device for construction vehicles and other devices.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the outline of the embodiment, Fig. 2 is a plan view when the same is turned, Fig. 3 is a partially cutaway plan view enlarging the main part of Fig. 1, and Fig. 4 is the plan view of Fig. 3. FIG. 5 is an enlarged vertical cross-sectional view of the conventional technology, and FIG. 5 (a) is a front view and FIG.
) is a plan view of the same figure (a), and the same figure (C) is a plan explanatory view at the time of turning. 1.2...object, la, 2a...center of rotation, 11.
21...teeth, 13.23...long hole, 14.24...
・Vertical axis, 15.25...Bearing, 16a, 16b...
Upper thick plate, 26a, 26b...lower thick plate, patent applicant Sakai Heavy Industries Co., Ltd.

Claims (1)

[Claims] (1) first and second objects that rotate relative to each other; a large number of teeth that are formed on both objects along arcs centered on their respective pivot points, and mesh with each other at opposing parts; Long holes formed in the object along the arc, a vertical shaft movable along each long hole and individually engaged with each long hole, and fixed across between the respective vertical axes of both objects. What is claimed is: 1. A pivoting connection device comprising: a retainer, and configured to allow both objects to rotate freely relative to each other within a plane.