Technical realization elements of valve positioning device of high-precision valve grinder

Technical realization elements:

3. In view of the above-mentioned shortcomings in the prior art, the technical problem to be solved by the present utility model is to provide a high-precision valve grinder valve positioning device, which can adapt to the positioning requirements of the large end face of the valve with ordinary accuracy and ensure positioning accuracy.

4. In order to solve the above technical problems, the valve positioning device of a high-precision valve grinder of the present invention includes a positioning drive cylinder. A positioning sleeve is installed at the extension end of the piston rod of the positioning drive cylinder, and the front end of the positioning sleeve is provided The ball head supporting hole is inserted into the ball head supporting hole with a positioning member. The positioning member is movably inserted into the ball head supporting hole through the ball head at the rear end. There are positioning protrusions, which are evenly distributed on the outer end surface of the positioning disk in the circumferential direction, an o-shaped elastic ring is installed on the wall of the ball head supporting hole, and the ball head of the positioning member is located inside the o-shaped elastic ring, The outer surface of the ball head is attached to the o-shaped elastic ring.

5. In the above structure, since a positioning sleeve is installed at the extending end of the piston rod of the positioning drive cylinder, a ball bearing hole is provided at the front end of the positioning sleeve, and a positioning piece is inserted into the ball bearing hole. The part is movably inserted into the ball bearing hole through the ball head at the rear end, then the positioning piece is inserted into the ball bearing hole of the positioning sleeve through the ball head, and the ball head and the ball bearing hole are connected as a ball hinge. , The positioning member can change its position 360 degrees around the axis of the positioning sleeve within a certain range, so as to adapt to the positioning requirements when the position accuracy of the valve end face is not high, and to ensure the positioning accuracy.

6. Since the front end of the positioning part is provided with a positioning disc, and the outer end of the positioning disc is provided with positioning protrusions, the positioning protrusions are evenly distributed on the outer end surface of the positioning disc in the circumferential direction, the positioning disc at the front end of the positioning part passes through the positioning protrusions and the valve end face The positioning contact reduces the contact area between the positioning plate and the valve end face, so that it can meet the positioning requirements when the valve end face shape accuracy is not high, play a good role in positioning, and ensure positioning accuracy.

7. Because an o-shaped elastic ring is installed on the wall of the ball head supporting hole, the ball head of the positioning member is located inside the o-shaped elastic ring, and the outer surface of the ball head fits the o-shaped elastic ring, The o-shaped elastic ring provided can limit the position of the positioning member, and prevent the positioning member from slipping out of the ball bearing hole, and at the same time, it does not affect the movable connection between the positioning member and the ball bearing hole.

8. In a preferred embodiment of the present utility model, a ball head seat is provided at the front end of the positioning sleeve, and the ball head supports

The hole is arranged on the ball seat. By adopting this embodiment, the structure of the positioning sleeve can be simplified, and the ball head seat can be made of a wear-resistant material different from that of the positioning sleeve, which reduces the manufacturing cost of the positioning sleeve.

9. In another preferred embodiment of the present invention, the ball head supporting hole includes a cylindrical hole section and a conical hole section at the bottom of the cylindrical hole section. With this embodiment, the ball head supporting hole has a simple structure and can meet the requirements of ball head support.

10. In another preferred embodiment of the present invention, the o-shaped elastic ring is installed on the cylindrical hole section of the ball bearing hole. By adopting this embodiment, the limit requirement for the ball head of the positioning element can be met.

11. In a further preferred embodiment of the present invention, the positioning drive cylinder is an adjustable stroke cylinder. By adopting this embodiment, it is possible to adapt to the positioning requirements of different valves by adjusting the stroke of the cylinder piston.

12. In another further preferred embodiment of the present invention, three to five positioning protrusions are provided on the outer end of the positioning plate. By adopting this embodiment, three to five positioning bumps can meet the positioning requirements for ensuring positioning accuracy when the contact area is reduced to adapt to the low-precision requirements of the valve end surface shape.

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