JP2711267B2 - Swivel coupling device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning connection device for connecting two objects relatively rotatably without changing the distance between the turning centers of the two objects.

[Prior Art] As this kind of conventional turning connection device, there is, for example, one shown in FIGS. 5 (a) and 5 (b). That is, one object A and the other object B are pivotally connected to each other by a pivot C, and the two objects A and B are connected so as to be pivotable about the pivot C in a plane perpendicular to the pivot C. It is possible to refract the space. Although the objects A and B shown in the figure have an axial shape, this is of course an example.

[Problems to be solved by the invention]

However, according to the prior art, although the entire refraction due to the relative rotation of the two objects A and B is performed smoothly, as shown in the explanatory diagram of FIG. The distance between each of the certain points Aa and Ba becomes smaller from the distance L before refraction to the distance La after refraction. For this reason, according to the above-mentioned conventional art, a problem caused by the change in the distance appears in each technical field to which the turning connection device is applied. To illustrate this, first, each of the objects A and B forms a vehicle body,
In a vehicle of a type in which these two vehicle bodies are connected by a pivot C, the wheelbase becomes small at the time of steering, and as a result, a problem such as a decrease in steering stability appears. Second, when the robot is used as a robot arm (manipulator) for the objects A and B, the linear distance from the base end to the tip of the arm changes due to refraction, so that the tip of the arm can reach the target position. However, there is a problem that a telescopic telescopic structure is required to reach the target position.

As described above, in the above-described conventional turning connection device, the relative turning of the two objects connected by this causes the linear distance between certain points of both objects to change, causing various problems. There are drawbacks.

Therefore, an object of the present invention is to provide a turning connection device in which the linear distance between certain points of both objects does not change even if two objects to be connected turn relatively.

[Means for solving the problem]

The turning connection device according to the present invention comprises a plurality of first and second objects which are relatively turned, and a plurality of objects respectively formed on the two objects along an arc centered on the respective turning center points and meshing with each other at opposing portions. Between the teeth, the long holes respectively formed along the arc in both objects, the longitudinal axis individually engaged with each long hole movably along each long hole, between each longitudinal axis of both objects And a retainer that is fixed to the object. The two objects are configured to be relatively rotatable in a plane.

[Action]

When the first and second objects are relatively turned, the two objects are turned while changing the meshing position of the teeth formed along the arc at the opposing portions, and the two objects are bent. At this time, since a large number of teeth are along an arc centered on the turning center point of the object on which the teeth are formed, the linear distance between the turning center points of both objects does not change even if the meshing position changes due to the turning. .

Further, since the two objects are connected by a vertical axis which engages with the arc-shaped long hole and a retainer which is fixed between the vertical axes, the relative height position of the opposing portions of the two objects is always maintained. Maintain the same and prevent separation between the two objects.

Thus, the meshing of the teeth prevents the two objects from approaching each other, and the engagement between the elongated hole and the vertical axis and the retainer fixed across the vertical axis allows the vertical position of the meshing portion of the two objects to be adjusted. In order to be determined and to prevent the two objects from separating, both objects are connected in each direction.

〔Example〕

1 to 4 show an embodiment of the present invention. Here, FIGS. 1 and 2 are schematic plan views, in which 1 indicates a first object, and 2 indicates a second object, and it is assumed that the object turns around the turning centers 1a and 2a, respectively.

As shown in FIGS. 3 and 4, both objects 1 and 2 are provided with teeth 11 and 21 that mesh with each other at opposing portions. These teeth 11,21
Are formed along the arc centered on each of the turning centers 1a and 2a at the opposing portion, and the two objects 1 and 2 always mesh with each other in a part of the arc. As shown in FIGS. 3 and 4, the formation of the teeth 11 and 21 for the two objects 1 and 2 is performed by combining the blocks 12 and 22 in which the teeth 11 and 21 are individually formed with one of the objects 1 and 2, respectively. Of the upper thick plate 16a, 26a and the lower thick plate 16b, 26b
It is fixed to the lower surface of a, 26a by bolts 12a, 22a.

Also, the upper planks 16a, 26a and the lower planks 16b of the two objects 1, 2
26b, elongated holes 13, 23 are respectively formed along the arc,
The longitudinal axes 14, 24 are engaged therethrough. Vertical axis 14,
Rolling bearings 15, 25 are interposed between 24 and the long holes 13, 23,
The bearings 15 and 25 allow the longitudinal axes 14 and 24 to move along the slots 13 and 23, respectively. The outer diameters of the outer rings of the bearings 15 and 25 are slightly smaller than the widths of the long holes 13 and 23.

The upper ends of the vertical axes 14, 24 are fixed to a plate-shaped retainer 31, and the lower ends of the vertical axes 14, 24 are also plate-shaped retainers 32.
It is fixed to. These are fixed by the fitting force between them and the disk 14 fixed to the end faces of the longitudinal axes 14 and 24 and the retainers 31 and 32.
a, 24a with the fixing force.

The sliding washers 18a, 28a fixed to the upper thick plates 16a, 26a are provided between the upper surfaces of the upper thick plates 16a, 26a and the lower surface of the retainer 31.
Are interposed on the outer circumference of the vertical axes 14, 24, and the lower thick plate 1
Slide washers 18b, 28b are also interposed between the retainers 32 and 6b, 26b in a vertically symmetric manner.

 Next, the operation of the turning connection device will be described.

FIG. 1 shows a state in which both objects 1 and 2 are connected linearly, and FIG. 2 shows a state in which both objects 1 and 2 are relatively turned and bent. Turning centers 1a, 2 when in the linear state of FIG.
The distance L between a is maintained even in the refracted state shown in FIG. That is, due to the relative rotation of the two objects 1 and 2, the mutually meshing positions of the joint teeth 11 and 21 move left and right, but this meshing position is the center of rotation 1 of the two objects 1 and 2.
Since it is always on the same arc centered on a, 2a, the distance between the meshing position and the turning centers 1a, 2a is always kept the same. Therefore, the straight line distance between the turning centers 1a and 2a is always the same.

Based on the movement of the meshing position of the teeth 11, 21, the vertical axes 14, 24
Move along the slots 13 and 23 with the bearings 15 and 25 and the retainers 31 and 32, and move the teeth 11 and 21 on a straight line connecting the turning centers 1a and 2a.
And the centers of the retainers 31, 32 are located.

Here, the longitudinal axes 14, 24 penetrating the long holes 13, 23,
The upper planks 16a, 26a and the lower planks 16b, 2
6b, the two objects 1, 2
At the joining position is prevented from being bent up and down, the relative height position being shifted, and being separated back and forth.

In addition, although each of the vertical axes 14 and 24 is two, each of which is four in total, it is assumed that the number can be appropriately increased or decreased. Also, the upper planks 16a, 26a and the lower planks 16b, 26b are part of the objects 1, 2, and the longitudinal axes 14, 24 are passed through these two planks, but if the planks are even thicker, , Which may be one.
In this case, the blocks 12, 22 of the teeth 11, 21 are buried in grooves formed in the thickness of the thick plate, and the teeth 11, 21 are opposed to each other so that they mesh with each other. Become.

As the two objects 1 and 2, for example, a front vehicle body and a rear vehicle body constituting a vehicle body of a construction machine or a member fixed therebetween may be applied as a joint of various objects connected to each other. it can. When used as a connecting device for the front and rear vehicle bodies, by setting the turning centers 1a and 2a at the center in the width direction of the front and rear wheel shafts, the wheel base of the vehicle is maintained the same between straight traveling and turning. can do.

〔The invention's effect〕

As described above, in the turning connection device of the present invention, even when two objects to be connected are relatively turned, the linear distance between certain points of the two objects can be maintained the same as before turning. Therefore, it can be widely applied as a construction vehicle or other coupling device.

[Brief description of the drawings]

1 is a plan view showing an outline of the embodiment, FIG. 2 is a plan view at the time of the turning, FIG. 3 is a partially cutaway plan view in which main parts of FIG. 1 are enlarged, and FIG. 4 is FIG. FIG. 5 shows a prior art, in which FIG. 5 (a) is a front view, FIG. 5 (b) is a plan view of FIG. 5 (a), and FIG. It is a plane explanatory view at the time. 1,2 ... Object, 1a, 2a ... Center of rotation, 11,21 ... Tooth, 13,23
…… Long hole, 14,24 …… Vertical axis, 15,25 …… Bearing, 16a, 16b…
… Upper plate, 26a, 26b… Lower plate,

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-47-44520 (JP, A) JP-A-51-85850 (JP, A) JP-B-57-60962 (JP, B2)

Claims (1)

(57) [Claims] A first and a second object that relatively rotate;
A large number of teeth formed on each of the two objects along an arc centered on the respective pivot center points and meshing with each other at opposing portions; a long hole formed on each of the two objects along the arc; A longitudinal axis movably engaged with each of the long holes so as to be movable along the hole, and a retainer fixed between the longitudinal axes of the two objects, so that the two objects can be relatively swiveled in a plane. A swivel coupling device, comprising: