Stripper

FIELD: machine engineering, namely mechanical strippers.

SUBSTANCE: stripper includes traverse bar with grips, screw having two outer threads with different pitches; main detachable sleeve mounted by thread whose pitch is less than that of said screw; additional threaded sleeve mounted by second thread of said screw; holder embracing both sleeves, fixed relative to them in angular direction and resting by its inner shoulder upon end of main sleeve. Inner shoulder is formed on one end of holder; other open end of holder is arranged in through opening of traverse bar and it is rigidly joined with said bar. Threads of powerful screw have similar sign; additional sleeve has outer flange spaced from open end of holder by interval determined according to relation K = B1(H2/H1 - 1), where K - interval between outer flange of additional sleeve and open end of holder; B1 - displacement (caused by main sleeve) of part stripped by means of stripper; H2 - thread pitch of additional sleeve; H1 - thread pitch of main sleeve. Sleeves are mutually spaced by interval T exceeding value of mutual convergence of sleeves.

EFFECT: simplified usage of stripper.

1 dwg

 

The invention relates to the field of engineering, namely to mechanical pullers.

Known mechanical puller, containing a spreader, clamps, connected with the head plate, and the sleeve having external threads mating with the threads of the bar, and threaded mating with a power screw. Outer thread of the sleeve is less than the step and opposite directions with respect to its internal thread. And on the upper end of the power screw is installed with the possibility of axial movement of the drive element at the end which made Cams for engagement with grooves made at the end of the sleeve. At the other end of the sleeve is made of the outer flange resting on the yoke (1).

The disadvantage of this puller is the need for increased traction removal of parts to put the drive element with the sleeve and to change the direction of rotation of the power screw, which represents a disadvantage of the operation.

Closest to the invention to the technical essence is a mechanical puller, containing traverse with grips, power screw, made with two outer threads of different steps and directions relative to each other, and two threaded bushings - main set on the thread of the screw is smaller increments, and additional installed on the second thread of the screw. Bushings are covered by the ferrule, operadagen main sleeve internal shoulder, made at one end of the cage. And the other open end of the ferrule is installed in a through hole of the bar and rigidly connected to the latter. The Cup and sleeve fixed relative to each other in an angular direction by means mounted on the bushings radial fingers placed in the longitudinal groove of the bracket. Groove clip has a G-shaped end for interaction cross-section with a radial finger extra sleeve in the transition from early-stage puller parts to the final (2).

The disadvantage of this puller is the need at the end of the initial stage of removal of parts to change the direction of rotation of the power screw, which in itself is uncomfortable, and, in addition, leads to a lateral displacement of the extractor relative to the workpiece, as is attenuated axially clamped between them, which requires recovery of their mutual alignment.

The aim of the invention is to increase the convenience of operation.

This is achieved by the fact that the stripper containing traverse with grips, power screw, made with two outer threads of different steps with respect to each other, the threaded main sleeve mounted on the threads of the smaller step of the power screw, the screw an additional sleeve mounted on the second threaded power screw and yoke, covering both sleeve fixed relative to last the x in the angular direction, based on the basic sleeve internal shoulder, made at one end of the casing, and the other open end inserted in a through hole of the bar and rigidly connected with the latter, characterized in that thread on the power screw is made in one direction, while the secondary sleeve is made of the outer flange, an opposed open end of the casing at intervals corresponding to the following dependence

To=1(H2/N1-1),

where K is the interval between the outer flange of the additional sleeve and the open end of the shroud;

In1- remove shift puller details through the main sleeve;

H2- step thread for more bushings;

H1the thread pitch of the main sleeve,

and sleeve are located relative to each other with an interval T, greater than the magnitude of the convergence of the sleeves.

The technical result of the invention is to make a smooth transition from the initial stage of removal of parts to the final due to the unidirectional working rotation of the power screw.

As between the outer flange of the additional sleeve and the open end of the shroud is formed of the interval, at the initial stage of removal of parts traction on the latter will provide based on the internal suplicio clip main sleeve. After the initial stage of removal of parts of the interval between the flange of the additional sleeve and from rythym the end of the clip exhausted. Leaning flange on the end of the clip additional sleeve will provide cravings final stage of removal of parts. Sleeve at the completion of the removal of parts will approach, but do not come into mutual contact. The transition from the initial stage of removal of parts to the final will take place gradually, with increasing support efforts on the open end of the holder and the counter decrements the reference effort on the inside shoulder. The estimated value of the interval determines the desired length of the initial stage of removal of parts. And the estimated value of the interval T excludes mutual zakanchivanii bushings on the power screw to complete the removal of parts.

The drawing shows a longitudinal section of a stripper in the original working position.

The stripper contains yoke 1 with the grippers 2, power screw 3, is made with two outer threads 4 and 5, one direction, and the thread 4 of a smaller step on thread 5. The screw 4 is installed the main sleeve 6, and the screw 5 additional sleeve 7. Sleeve 6 and 7 comprises a holder 8, is fixed relative to the last in the angular direction of the pins 9 and 10. The main sleeve 6 and the holder 8 is based internal shoulder 11, is made at one end of the cage. And the other open end face 12 of the ferrule 8 is installed in a through hole of the bar 1 and is rigidly connected with the latter through a fixed threaded connection. N. the additional sleeve 7 is made of the flange 13, opposing the open end 12 of the casing 8 with an interval corresponding dependencies

To=1(H2/N1-1),

where K is the interval formed between the open end 12 of the casing 8 and the flange 13 of the sleeve 7;

In1- remove shift items 14 through the main sleeve 6;

H2the thread pitch of the sleeve 7;

H1the thread pitch of the sleeve 6.

And between the sleeves 6 and 7 formed in the interval T, is greater than the magnitude of the convergence of the sleeves.

The extractor works as follows.

During the rotation of the power screw 3, supported on the shaft 15 when installed on details 14 the grippers 2, the main sleeve 6, based on suplicio 11 of the shroud 8, creates cravings initial stage of removal of parts 14 from the shaft 15. When shifting items 14 on the value of B1additional sleeve 7 utopics inside holder 8 to a depth of K, due to the difference between the axial passage of the sleeve 7 on the power screw 3 and its speed together with power screw. Relying flange 13 on the end face 12, the sleeve 7 is smoothly take over cravings final stage of removal of parts 14, relieving the main sleeve 6, which will be separated from the shoulder 11 of the shroud 8. As a result of removal of parts 14 of the sleeve 6 and 7 are mutually converging, and the execution interval T is larger (almost 2-3 mm) values of mutual alignment sleeves 6 and 7 eliminates their mutual zakanchivanii on the power screw 3 when the removal of parts 14. At the same Wuxi the AI handle power screw 3 pull puller in the initial stage of removal of parts 14 will be higher thrust his efforts in the final stage in the ratio, equal ratio steps carving additional sleeve 7 and the sleeve 6. Despite the fact that the shift value items 14 on the shaft 15 when increased traction is smaller, the reliability of dismantling the details will be provided as a substantially increased force connector press-fit connection is observed in the initial stage, which constitutes a smaller share of the connection.

Bibliographic data

1. USSR author's certificate No. 990493, class 25 In 27/02, 1983.

2. Description of the invention to the patent of Russian Federation №2009869, class 25 In 27/02, 1994.

Mechanical puller, containing traverse with grips, power screw, made with two outer threads of different steps with respect to each other, the threaded main sleeve mounted on the threads of the smaller step of the power screw, the screw an additional sleeve mounted on the second threaded power screw and yoke, covering both sleeve fixed relative to the last in the angular direction based on the end of the main sleeve internal shoulder, made at one end of the casing, and the other open face set in a through hole of the bar and rigidly connected with the latter, characterized in that thread on the power screw is made of one direction when this additional sleeve is made of the outer flange with an interval relative to the open end of the shroud, which is adequate according to

K=B1(H2/H1-1),

where K is the interval between the outer flange of the additional sleeve and the open face of the shroud;

B1- remove shift puller details through the main sleeve;

H2- step thread for more bushings;

H1the thread pitch of the main sleeve,

and sleeve are located relative to each other with an interval T is greater than the value of the mutual convergence of the sleeves.



 

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