RU2492954C1 - Appliance for disc rim straightening - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for automotive wheel disc straightening. Disc fixture and straightening mechanism are arranged at the bed. Straightening mechanism is composed of hand lever provided with thread to accommodate thumb nut, thrust bearing and two cams self-centring at disc flange. Cavity made in lever second half accommodates rod with return spring to be locked by bush. Note here that radius sector is fixed at lever end for disc rim to be straightened threat.

EFFECT: simplified design, expanded performances.

6 dwg

Description

The invention relates to the field of engineering, in particular to equipment for the field of car service and can be used to edit steel disks of automobile wheels having a deformation of the type of the so-called "eight".

A known stand for editing wheels of automobile wheels, containing mounted on the bed dressing mechanism with a clamping device. The dressing mechanism is made in the form of a rack, on the shaft of which a two-arm lever is fixed with the possibility of moving in the vertical plane, at the end of one shoulder of which a clamping device is fixed, with the possibility of interaction with the wheel disk, and the end of the other shoulder is kinematically connected with a manual drive. An indicator of movement of the clamping device [1] is fixed on the shaft of the rack.

A disadvantage of the known device is the complexity of its design and the complexity of management, large dimensions.

Closest to the proposed device is a device for editing wheel rims [2], which contains a mandrel mounted on the bed for fixing the straightened rim and the correct mechanism in the form of a fork-shaped lever, in the eyes of which on the axis there is a central profiling roller, two side profiling rollers mounted on free ends of rotary levers, and drive rollers. The shank of the fork-shaped lever is pivotally mounted on the bed with the possibility of rotation in a plane perpendicular to the axis of the central roller, and through the slots are made through the slots in which the ends of the axis of the central roller are freely located, while the drive for moving the rollers is made in the form of a traverse mounted on the bed with the possibility radial movement relative to the central roller, and the lead screw passing through the crosshead, on which the beam is pivotally fixed, abutting its ends against the fork a different lever.

The disadvantages of the prototype device are the difficulty in setting the initial position of the rollers, the rapid wear of the friction working surfaces of the actuators, which results in a backlash that leads to inaccurate machining of the wheel disc and design complexity that does not allow repair of wheels of different sizes, limitation in its functionality .

The objective of the invention is to simplify the design, expand the functionality.

The problem is achieved in that in the device for editing disk rims containing a bed with a disk mounting device and a dressing mechanism according to the invention, the dressing mechanism comprises a shaft, the first half of which is made with a handle fixed to the end, and the second half has a larger diameter , made hollow and threaded, a stationary sector fixed at the end of the second half of the shaft, a nut with handles mounted on said shaft thread, thrust bearing, slider, two freely rotating I am on the axes of a self-centering cam with a working profile that copies the outer surface of the rim, a pin installed in a groove made in the second half of the shaft and serving to ensure a constant position of the self-centering cams relative to the radius sector and to prevent the slide from turning relative to the shaft, installed in the said cavity of the second half of the shaft a rod, a return spring and a sleeve located on said rod.

Figure 1 shows the design of the proposed device, made in the form of a shaft 1, at the end of the first half of which a handle 2 is placed, and on the second, larger half of which a thread is made, on which a nut 3 with two handles 4 and a thrust bearing 5 are placed, a slider 6 containing two self-centering cams 7, the working profile of which copies the outer surface of the wheel rim freely rotating on the axles 8, and a pin 9 used to communicate with the manual lever 1 and the sleeve 10. In the second half of the shaft, a groove for moving I have pin 9 and the cavity in which the rod 11 is mounted with a return spring 12 and a sleeve 10 placed on it. The return spring 12 through the sleeve 10 and pin 9 constantly presses the slider 6 against the thrust bearing 5 and nut 3. At the end of the second half of the shaft, a radius sector 13, which carries out the alignment of the rim flange. The pin 9 keeps the slider 6 from turning relative to the shaft 1, providing a constant working position of the self-centering cams 7 relative to the radius sector 13.

Figure 2 and 3 shows the installation time of the proposed device on the deformable section of the rim flange. Figure 4 shows the working position of the proposed device when straightening the flange of the wheel rim. Figure 5 presents the working location of the radius sector 13 with respect to the rim of the rim. Figure 6 shows the design of self-centering cams 7 on a wheel rim shelf.

The proposed device operates as follows.

On the horizontal working surface of the bed the wheel is fixedly mounted in a known manner. Holding the device by the handle 2, the operator places this device on the wheel rim, where the rim flange is deformed. The position of the device when mounted on the rim is shown in figure 2, 3, while the radius sector 13 should touch the deformed part of the flange, and the self-centering cams 7 are at some distance from the flange of the rim. Rotating the handles 4 nut 3 clockwise, the latter through the bearing 5 moves the slider 6 to the right along the shaft 1 until the self-centering cams 7 are in full contact with the rim flange. In this case, the pin 9 through the sleeve 10 compresses the return spring 12. With a further rotation of the nut 3, the slider 6 stands still, and the shaft 1 begins to move to the left together with the radius sector 13, which, acting on the defective section of the flange, restores it. To straighten the flange in a horizontal plane, it is necessary to exert force on the handle 2 in the desired direction. To remove the device from the rim, it is necessary to rotate the nut 3 counterclockwise, then under the action of the return spring 12 on the sleeve 10 and the pin 9 the slider 6 moves to the left, thereby freeing the rim shelf from the self-centering cams.

Information sources

1. Patent RU No. 62875, B60S 5/00, publ. 05/10/2007

2. Patent RU No. 2050998, IPC 6 B21D 1/10, publ. 12/27/1995 g.

Claims (1)

A device for editing disc rims, comprising a bed with a disc mounting device on it and a dressing mechanism, characterized in that the dressing mechanism comprises a shaft, the first half of which is made with a handle fixed to the end, and the second half has a larger diameter, is hollow and threaded the radius sector fixed on the end of the second half of the shaft, a nut with handles mounted on the shaft thread, a thrust bearing, a slider, two self-centering cams that rotate freely on the axes a profile copying the outer surface of the rim, a pin installed in a groove made in the second half of the shaft and serving to ensure a constant position of the self-centering cams relative to the radius sector and to prevent the slide from turning relative to the shaft, a rod, a return spring and a sleeve installed in the said cavity of the second half of the shaft placed on said rod.

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