SU990493A1 - Mechanical removing tool - Google Patents

Description

The invention relates to mechanical engineering, in particular to mechanical pullers used to remove gear shafts, pulleys, bearings from shafts. . .

A mechanical puller is known, comprising a yoke with grippers and a threaded hole, an intermediate bushing with internal and external threads, placed in a threaded hole, with an external thread pitch smaller than the internal pitch, a stop screw located in the sleeve, on which a half-coupling cam is installed with the possibility of axial movement, and the intermediate sleeve is made with a response cam half coupling at one of the ends. To fix the sleeve against rotation in the traverse, a smooth hole is made in which it is installed with axial movement of the tractor / interacting with one end with the intermediate sleeve through the annular groove, with the other end fixed on it with a spring-loaded latch with the cam half coupling 1.

The disadvantage of this puller is the high complexity of the puller design.

The closest to the proposed technical essence and achievable;

The result is a mechanical puller containing a crossbeam with a central threaded hole, an intermediate sleeve with a flange and internal and external threads of different steps, located in it, an intermediate sleeve lock, made in the form of a spring-loaded finger placed 10 in a smooth hole, located in the sleeve has a stop screw, on the non-threaded part of which the drive element is mounted with the possibility of axial movement, and the clamps,

... articulated with crosshead 2.

A disadvantage of the known puller is the complexity of the design and the low reliability of fixing the intermediate sleeve due to the laboriousness of manufacturing the fixing element.

The purpose of the invention is to simplify the design and increase reliability.

This goal is achieved by the fact that in a mechanical puller, containing a traverse with a central hole, a threaded bore with an intermediate bushing with a flange and internal and external threads in different steps, an intermediate bushing lock, a stop screw located in the bushing,

thirty

Claims (2)

The non-threaded part of which is installed with the possibility of axial movement of the drive element and grips, hingedly connected to the crosshead, the flange of the intermediate sleeve is placed on the side opposite to the location of the drive element, and acts as its retainer, and the threads of the sleeve are made in different directions. The drawing shows the proposed puller, the overall appearance. The mechanical puller contains a yoke 1 with a central threaded hole 2, an intermediate sleeve 3 placed therein with a flange 4 and an internal 5 and an external 6 thread of different steps, located in the sleeve 3 a stop screw 7, on the non-threaded part 8 of which the axially mounted element is mounted. 9, the claws 10 and 11 pivotally connected to the crossmember 1. The flange 4 of the intermediate sleeve 3 is located on the side opposite to the position of the drive element 9, and acts as a retainer, and the threads 5 and b of the sleeve 3 are different Management Board, the outer - left and right inner. The drive element 9 is made in the form of a glass with protrusions 12 and 13 at its end, interacting with corresponding slots 14 and 15, made at the end face of the sleeve 3. The puller works as follows. The grippers 10 and 11 are screwed on the removable piece 16 and the stop screw 7 is rotated through the drive element 9 in a clockwise direction. Under the action of the friction force in the threaded connection, the sleeve 3 will tend to turn in this direction too, however, since its external thread has a left direction of turns, the sleeve 3 must simultaneously move in the opposite stop screw 7 direction, which is prevented by the flange 4 Thus, the rotation of the sleeve 6 is excluded. With a significant effort to remove the parts, which is often; observed at the initial moment of operation, the drive element 9 is moved along the stop screw 1, the protrusions 12 and 13 are aligned with the grooves 14 and 15 and continue to rotate the drive element 9, but in the opposite direction. Together with the stop screw 7, the intermediate sleeve 3 begins to rotate, and since its external thread pitch is less than the internal thread pitch, the removal force increases with the same force on the handle 17. When the removal force is weakened, in order to accelerate the final part of the operation, the drive element 9 is retracted from intermediate sleeve 3 and the screw 7 is rotated clockwise again. In this case, if the friction force in the mating screw bushings will be greater than the friction force in the mating bushing-yoke, then the bushing 6 will return to the previous position until the flange 4 stops in the yoke 1, otherwise it will remain in the new position. The proposed puller is easy to manufacture and reliable in operation. : Formula of the invention A mechanical puller containing a crossbeam with a central threaded hole, an intermediate sleeve with a flange and internal and external threads of different steps, an intermediate sleeve lock, a stop screw located in the sleeve, on a non-threaded part of which the drive element is axially movable and grippers that are hingedly connected to a crossbeam, characterized in that, in order to simplify the construction and increase the reliability of fixation, the flange of the intermediate sleeve is placed on the side, opposite to the location of the drive element, and plays the role of its retainer, and the threads of the sleeve are made in different directions. Sources of information, pr1 e in. attention in the examination 1. The author's certificate of the USSR 697312, cl. B 25 B 27/02, 1978. 2. USSR author's certificate for application no. 2776565/25-28, cl. B 25 B 27/02, 1979 (prototype).