JPH059639Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a tire compression testing machine, and particularly relates to an improvement in a clamping mechanism for clamping a tire support shaft on which a tire is attached to a bearing member.

B. Prior Art Conventionally, this type of clamping mechanism has a pair of clampers disposed on both sides of the tire support shaft to clamp the tire support shaft in the radial direction, and a screw thread attached to one end of each clamper. It is composed of a screw shaft which has forward and reverse screws coaxially screwed together and is rotatably supported by a bearing member, and an operating handle provided at the end of the screw shaft. Therefore,
The rotation of the screw shaft in one direction by operating the handle simultaneously opens and closes a pair of clampers to clamp and fix or release the tire support shaft.

C. Problems to be solved by the invention However, in this type of clamping mechanism based on manual rotation of the screw shaft, the pair of clampers supported by the screw shaft have a cantilevered structure, so they cannot tighten the tire support shaft. Therefore, the clamping force is weakened because the moment acts as a reaction on the free end side, and it is not possible to apply a large tightening torque to the screw shaft by manual handle operation.Furthermore, the clamper has a small contact area with the tire support shaft due to its structure. There are structural restrictions in making the tire support shaft wider, and as a result, the tire support shaft cannot be securely clamped and fixed.

The technical problem of the present invention is to securely fix the tire support shaft with a simple structure.

D. Means for Solving the Problems To explain the present invention with reference to FIG. Elastic deformation parts 2a, 2b are formed by providing a pair of horizontal grooves 7a, 7b spaced apart from each other, and a vertical groove 8 formed in the axial direction between the horizontal grooves 7a, 7b. A hydraulic clamping mechanism 9 is provided which elastically deforms the elastically deformable parts 2a and 2b by hydraulic pressure and clamps and clamps the tire support shaft 3 inserted into the insertion hole 6 in the radial direction.

E Effect When pressure oil is supplied to the hydraulic clamping mechanism 9, the vertical groove 8
The elastic deformation parts 2a and 2b forming the
The tire support shaft 3 is securely clamped and fixed to the bearing member 2. Since the elastic deformation parts 2a and 2b are provided approximately at the center of the bearing member 2, the weight of the tire is reliably supported at both ends of the bearing member 2.

Note that in the above sections D and E explaining the configuration of the present invention, figures of embodiments are used to make the present invention easier to understand, but the present invention is not limited to the embodiments.

F. Embodiment An embodiment of the tire compression testing machine according to the present invention will be described with reference to FIGS. 1 to 5.

FIG. 2 shows a side view of the tire compression testing machine of the present invention, and FIG. 3 shows a front view of the tire compression testing machine. In the figure, reference numeral 1 indicates a frame, and this frame 1 consists of a pair of upright side plates 10a and 10b.
and an upper frame 11 fixed to the top of the side plates 10a, 10b, and a tire support shaft 3.
The bearing member 2 is held movably up and down. Further, reference numeral 5 indicates a load platform, and the load platform 5 is connected to the tire support shaft 3.
This applies various loads to the tire 4 attached to the shaft end of the tire. This load platform 5 includes a bed 12 fixed to a frame 1, and a slide table 1 that moves forward and backward within a predetermined range in the axial direction of the tire support shaft 3.
3, a rotary table 14 that rotates forward and backward to give a torsional motion to the tire, and each of these tables 13 and 14.
and a ram 15 that moves up and down.

Next, the mounting structure of the tire support shaft 3 will be explained with reference to FIGS. 1, 4, and 5.

1 is a partial perspective view of the bearing member 2, FIG. 4 is an enlarged sectional view taken along the line -- in FIG. 2, and FIG. 5 is a sectional view taken along the line -- in FIG. In the figure, bearing member 2
An insertion hole 6 for inserting and supporting the tire support shaft 3 is bored in the bearing member 2, and a pair of horizontal grooves 7a and 7b communicating with the insertion hole 6 are formed at a predetermined interval in the axial direction on the upper surface and both side surfaces of the bearing member 2. It is formed by A vertical groove 8 communicating with the insertion hole 6 is formed in the axial direction between the pair of horizontal grooves 7a and 7b, and the elastically deformable portions 2a,
2b is provided. Furthermore, a pair of horizontal grooves 7
A clamping mechanism 9 is provided between a and 7b. This clamping mechanism 9 consists of a cylinder block 15 fixed to one side of the bearing member 2 across the vertical groove 8.
and a piston 1 slidably fitted inside it.
6, one end of which is screwed onto this piston 16 via a nut 17, and an elastically deformable portion 2 of the bearing member 2.
A rod 1 that passes through a and 2b and screws a nut 18 onto the other end to lightly press and hold both sides of the bearing member 2.
It consists of 9.

In addition, as shown in FIGS. 2 and 3, frame 1
A pair of linear guide rails 20a, 20b are fixed to the front surfaces of a pair of side plates 10a, 10b, and a pair of threaded rods 21a, 21b are rotatably supported on both sides of the side plates 10a, 10b. ing. One ends of the screw shafts 21a and 21b are connected to a pair of output shafts (not shown) of a speed reduction device 22 fixed on the upper frame 11, so that the rotation of the motor 23 is decelerated by the speed reduction device 22, and the rotation of the motor 23 is decelerated by the speed reduction device 22. The threaded rods 21a and 21b are driven to rotate synchronously.

The bearing member 2 can be moved up and down and positioned by the pair of linear guide rails 20a, 20b and threaded rods 21a, 21b configured in this way.

That is, as shown in FIG. 4, the brackets 24a,
Linear guide rails 20a, 2 are provided on the back of 24b.
A linear bearing 25a that is inserted and supported by 0b,
25b is fixed. Further, housings 26a and 26b protruding from both side surfaces of the bearing member 2 slightly rearward from the center in the axial direction are provided with threaded rods 21a and 21b.
Nuts 27a and 27b that are screwed together are inserted.

The tire compression testing machine configured as described above is used as follows.

When the pair of threaded rods 21a and 21b are rotated by the motor 23 via the reduction gear 22, the bearing member 2
moves up and down, and the tire support shaft 3 is positioned at a predetermined position. Next, the tire 4 is screwed onto the end surface of the tire support shaft 3, and the tire support shaft 3 is manually moved back and forth in the axial direction so that the center of the tire coincides with the rotation axis of the rotary table 14. The tire support shaft 3 thus positioned in the height and axial directions is sandwiched between the bearing members 2 in the following manner. That is,
When pressure oil is supplied into the cylinder block 15, the piston 16 moves outward and pulls the piston rod 19, so that the elastically deformed parts 2a and 2b of the bearing member 2 divided by the vertical groove 8 deform the cylinder block 15 and the nut 18. As a result, the tire support shaft 3 is reliably sandwiched between the bearing member 2 and the bearing member 2 . Furthermore, since the tire support shaft 3 is sandwiched between the bearing member 2 at approximately the center thereof, the tire support shaft 3
The weight of the tire acting on the bearing member 2 is reliably supported at both ends of the bearing member 2.

Note that although the grooves are provided on the upper surface and both side surfaces of the bearing member, the grooves are not limited to this, and may be provided at optimal positions as necessary.

G. Effect of the invention According to the invention, a pair of horizontal grooves are provided in the bearing member, and a vertical groove is provided between the horizontal grooves, and the elastic deformation portion forming the vertical groove is deformed by hydraulic pressure to deform the tire support shaft. Since the tire support shaft is fixed, the tire support shaft can be fixed efficiently and reliably by remote control, and stable support can be obtained even against lateral push and torsional loads when pressed by a load stand during tire testing. be effective. Furthermore, since the elastic deformation portion is provided approximately at the center of the bearing member, there is no problem in supporting the weight of the tire.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a partial perspective view of a bearing member, Figure 2 is a side view of a tire compression testing machine, Figure 3 is a front view thereof, and Figure 4 is a partial perspective view of a bearing member. The figure is an enlarged view of the - line cross section of Figure 2, and Figure 5 is the 4th section.
It is a sectional view taken along the - line in the figure. 1... Frame, 2... Bearing member, 2a, 2b
...Elastic deformation part, 3...Tire support shaft, 4...Tire, 5...Load platform, 6...Insertion hole, 7a, 7b
...Horizontal groove, 8... Vertical groove, 9... Clamping mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A bearing member guided and supported by a frame so as to be movable up and down, a tire support shaft inserted and supported through an insertion hole of the bearing member and clamped and fixed, and a tire support shaft attached to one end of the tire support shaft. In a tire compression testing machine having a load stage that applies a lateral push or torsional load to the pressing surface of the tire while pressing the mounted tire in the radial direction, the bearing member is provided with a tire that communicates with the insertion hole approximately at the center of the bearing member. A pair of horizontal grooves are provided to be spaced apart from each other in the axial direction, and a vertical groove is formed in the axial direction to communicate with the insertion hole between the pair of horizontal grooves to form an elastic deformation portion. The tire compression method further includes a hydraulic clamping mechanism that elastically deforms the elastic deformation portion using hydraulic pressure and clamps and clamps the tire support shaft inserted into the insertion hole in the radial direction. testing machine.