SU776852A1 - Mechanic hydraulic clamp - Google Patents

Description

The invention relates to the field of mechanical engineering, namely, to means of equipping metal-cutting machines, and can be used to clamp parts on metal-cutting machines. A mechanical 5-hydraulic clamp is known, comprising a housing with a hydraulic cylinder made in its lower part, the piston of which is connected to the clamping means, and carrying a threaded connection element, and the suprapercussion cavity is connected with a hydraulic booster cavity located in the upper part of the housing and containing at least two plungers interacting with power elements made in the form of a screw-nut in 15.

The disadvantage of this device is its large dimensions.

The purpose of the invention is to increase performance while reducing 20 dimensions.

This goal is achieved by the fact that the rams of the hydraulic booster are made different in diameter and placed coaxially relative to each other in conjunction with their respective power elements, while the clamping means are made in the form of compression power elements.

The drawing schematically shows a device. thirty

The mechanical-hydraulic clamp comprises a housing 1, in the lower part of which a piston 2 is placed, connected to a threaded rod 3 and interconnected with clamping means, including Belleville springs 4, a nut 5, washers 6 and 7, and a bar 8, as well as a hydraulic booster including a plunger 9, inside which coaxially placed another movable plunger 10, interacting with a screw And, movably connected to another screw 12 using a thread made in the inner hole of the latter. The screw 12 is connected by a thread with a nut 13 screwed onto the housing 1 and fixed with a pin 14. To reduce friction between the end surfaces of the plunger 9 and screw 12 during rotation of the latter, the bearing 15 and the clamped element 16 are used.

The device operates as follows.

The assembled clamp is screwed onto a stud 3 connected to the abutment surface. Between the abutment surface and the clamp, a clamping member 16 is mounted and the clamp is turned over to select gaps. Then, the screws 12 and 11 are rotated, and the screw 12 initially rotates, moving the plunger 9 through the thrust bearing 15.

Since the force is small during initial compression on the springs 4, the plunger 9 presses on the liquid with its entire area, including the area of the small plunger 10. As soon as the plunger 9 reaches the contact with the piston 2, it stops and the plunger 10 comes into operation, squeezing on the liquid is already a smaller area and, overcoming the resistance of the springs 4, compresses them. Thus, the compression of the springs.

After that, the clamping element 16 is clamped. To do this, it is necessary to turn the screw 11 in the opposite direction. In this case, the plunger 10 will first move, and then, when the return flange on the screw 11 reaches the contact with the bearing 15, the movement of the plunger 9 will begin, releasing the springs 4. Thus, the springs 4, when unclenched, will press the clamped element 16.

The proposed device is compact, lightweight, convenient to operate. The presence of two plungers placed coaxially reduces the difference between the initial and final torques on the screws and reduces the plunger stroke by about half, increasing the speed of the fastening process. The device can be used to fix cutters on large lathes, as well as to fix body parts on tables and stands of machines. Using the proposed principle, it is possible to create other devices that provide increased performance.

Claims (1)

Since during initial compression on the springs 4, the force is low, the plunger 9 presses on the fluid with its entire area, including the area of the small plunger 10. As soon as the plunger 9 reaches contact with the piston 2, it stops and the plunger 10 comes into operation on the liquid is already a smaller area and, overcoming the resistance of the springs 4, compresses them. This compresses the springs. After that, the clamped element 16 is clamped. To do this, it is necessary to rotate the screw 11 in the opposite direction. In this case, the plunger 10 will first move, and then, when the reverse collar on the screw 11 comes into contact with the bearing 15, the plunger 9 will begin to move, releasing the springs 4. Thus, the springs 4, unclenched, will press the clamped element 16. The proposed device It is compact, lightweight, convenient to use. The presence of two plungers placed coaxially reduces the difference between the initial and final torques on the screws and approximately halves the stroke of the plunger, increasing the speed of the fastening process. The device can be used to fasten the incisors on large lathes, as well as to fasten corps on the tables and stands of the machines. Using the proposed principle, you can create other devices that provide increased speed. Claims A mechano-hydraulic clamp comprising a housing with a hydraulic cylinder made in its lower part, the piston of which is connected to the clamping means, and a supporting threaded connection element, and a piston cavity connected to the working space of the hydraulic booster located in the upper part of the housing and containing at least , two plungers interacting with power elements, made in the form of a screw-nut, characterized in that, in order to increase speed with a simultaneous decrease in size, the plungers are hydro The silicon is made different in diameter and placed coaxially relative to each other together with the corresponding power elements, with the clamping means made in the form of force compression elements. Sources of information taken into account during the examination 1. Yu. I. Kuznetsov. Machine tools with hydraulic drives. Mechanical Engineering, M., 1974, p. 15, rice, 6a. 12 is