SU1318351A1 - Arrangement for securing pistons - Google Patents

Abstract

The invention relates to metal working and can be used in the treatment of pistons with their fastening along the hole for the piston pin. The purpose of the invention is to improve the accuracy of the FZ P fixing by eliminating the rotation of the fixed piston. The device for fixing the pistons comprises a housing 3 in which a rod 15 and retaining-clamping elements are placed, made in the form of dogs 9, located on axles 8 in the grooves of a spring-loaded cup 7. On the rod 15, the conical sleeve 20 is rotatably mounted with longitudinal grooves and the beveled teeth 22 on the end, intended to interact with the teeth 21 of the rod 15. At the ends of the dogs 9, the bevels 27 are made to interact with the bevels of the teeth 22 of the conical sleeve 20. 5 ill. c & (L 22 6 so 00 ate

Description

The invention relates to metal working and may find application in the processing of pistons of internal combustion engines with fastening along the hole under the piston pin.

The purpose of the invention is to improve the fixing accuracy by eliminating the rotation of the fixed piston.

FIG. 1 shows the device in a position with a clamped piston, a slit; in fig. 2 - view A on fig 1; in fig. 3 shows a section BB in FIG. one; 4 shows the node I in FIG. 1 (in the release position); in fig. 5 is the same in the position of the retracted clamping element.

The device contains a flange 2 mounted on the machine spindle 1 with a housing 3 fixed on it, which has surfaces 4 and 5 for diametrically and face-based machining piston 6. Inside the housing 3 is placed with the possibility of axial movement of the cup 7, on the end of which is in grooves on the axes 8 are symmetrically arranged swinging pawls 9, spring-loaded with flat springs 10. At the free end of pawls 9 there is a broadening 11 that can interact with the surface of the hole 12 under the piston pin of the piston to be machined 6 The rotation of the cup 7 relative to the housing 3 is eliminated by the screw 13. The cup 7 is spring-loaded by a spring 14 on the spindle 1, inside which the rod 15 is installed with the possibility of axial movement, connected to the rod 16 of the power cylinder of the machine (not shown). The movable rod 15 has symmetrical grooves 17 into which the pawls 9 enter. At the rod 15, the taper sleeve 20 is rotatably mounted with the axis 18 with the cylindrical head 19, the tooth 21 is made at the end of the rod 15 and the tooth 22 .

The conical part of the sleeve 20 is executed crosswise (Fig. 3) with grooves 23 whose width is equal to the width of the dogs 9. The forming 24 of the conical sleeve 20 is made with an inclination equal to the bevels 25 of the dogs 9.

The free ends 26 of the dogs 9 have bevels 27, having the ability to interact with the bevels 28, the teeth 22 of the conical sleeve 20, and the cylindrical head 19 of the axis 18 has

.

and

y. 5, 1,

25

183512 butt end with 26 dogs 9.

The device works as follows. 5 In the initial position (Fig. 5)

the rod 15 is under the action of the machine cylinder in the extreme left position, while the dogs 9 under the action of the springs 10 are sunk in the grippers 17 of the rod 15 and in the grooves 23 of the conical sleeve 20. The cylindrical head 19 abuts against the broadening 11 dogs 9, and the glass 7 is in leftmost position when compressed spru. 14

After installing the porsh 6 on the base surface 4 of the housing 3, when the rod 15 is moved to the right, the broadening 11 dogs 9 are released and under

20 by the action of the spring 14, the cup 7 moves to the right up to the stop of its collar in the housing 3, after which the pawl 9 emerges from the grooves 23 of the conical sleeve 20. When the rod 15 moves to the right, its teeth 21 abut against the top of the teeth 22 on the conical sleeve 20, and the output of the dogs 9 of the grooves 23 of the conical sleeve 20 under the action of bevels of these teeth 22

 the conical sleeve 20 is rotated on the axis 18 to half of the cross-shaped protrusion of the conical sleeve 20.

At the end of the stroke of the rod 15 to the right is automatically reversed the course of the power

35 of the machine cylinder and the rod 15 is moved to the left. In this case, the bevels 28 of the conical sleeve 20 are in contact with the bevels 27 of the pawls 9 and the conical and the sleeve 20 is turned to the rest

40 half cruciform protrusion. Upon further movement of the conical sleeve 20 to the left, its forming 24 interacts with the counter bevels 25 dogs 9, which, overcoming the force of the springs 10, unfold on the axes 8. In this broadening 11 dogs 9 enter into the holes 12 under the piston pin in the piston 6 and when contacting a cylindrical head

50 19 with the ends 26 of the dogs 9 the piston is pressed against the surface 5 of the housing 3.

The rotation of the piston 6 during processing 5 is prevented by the broadening of 11 dogs 9, which is made according to the diameter of the hole 12 under the piston pin.

After finishing the machining process, the spindle 1 of the machine stops at 3113.

this criminal situation. When the rod 15 is moved, the machined piston 6 is released to the right. The tooth 22 of the conical sleeve 20 abuts against the tooth 21 of the rod 15 and, under the action of their bevels, the tapered sleeve 20 rotates on the axis 18 half of the cross-shaped protrusion. When dogs 9 come together with 24 conical bushings 20 that form at the expense of bevels 27, they turn on the remaining half of the cross-shaped protrusion, and dogs 9 under the action of springs 10 sink into the slots 17 of the rods 15 (Fig. 4).

At the end of the stroke of the rod 15 to the right, the stroke of the power cylinder of the machine automatically reverses, and the rod 15 ne: moves to the left, while the fixing-clamping element takes the initial position (Fig. 5).

View /

18351

Formula

the invention

O

five

0

A device for fastening pistons, comprising a housing fixed to the spindle with a driving movable rod with a cylindrical head and locking-clamping elements symmetrically located in the grooves of the rod, made in the form of dogs, characterized in that, in order to increase the fixing accuracy, the device is provided with a spring-loaded cup with grooves and a conical sleeve installed with the possibility of rotation on the rod with longitudinal grooves on the surface and beveled teeth on the end, designed to interact with Making a at the end of the rod and the teeth bevels, provided on the end of pawls mounted in slots sta-. kana.

BB

Fig.Z

Phie.

-,

Compiled by A.Gribkov Editor S.Patrusheva Tehred M. Hodanich. Proofreader S. Shekmar

Order 2457/9. Circulation 975 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

Claim A device for securing pistons, comprising a housing with a movable drive rod with a cylindrical head and symmetrically arranged locking grooves made in the form of dogs, symmetrically arranged in the grooves of the rod, characterized in that the device is equipped with a spring-loaded cup with grooves and a tapered bushing mounted with the possibility of rotation on the rod with a bar at the end of the stroke of the rod 15 to the right, the stroke of the power cylinder of the machine is automatically reversed, and the rod 15 moves left, while the locking-clamping element occupies its original position (Fig. 5). longitudinal grooves on the surface and chamfered teeth at the end, designed to interact with teeth 70 made at the end of the bar and bevels made at the end of the dogs installed in the grooves of the glass. view A 22 24 3 Fi g. 2 B-b FIG. 3 I 10 FIG. 4 Fie 5