RU44273U1 - MULTI-CLIP CLAMP - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular to mechanical processing using multi-seat devices for fixing parts.

The proposed multi-seat device is characterized in that its lever clamping mechanism is made in the form of a roller-roller chain, the rollers of which have a radius greater than the radius of rounding of the chain links, which provides rolling friction when the chain links act on the clamp plunger of parts, the number of which can be increased same clamping force.

Description

The utility model relates to mechanical engineering, in particular, to machining using multi-seat devices for fixing parts.

A multi-seat clamping device is known (see SU 1748989 A1 B 23 Q 3/06) of the day of simultaneous fixing of several parts, made in the form of a housing with two parallel guide grooves located in it, in which prisms are installed with the parts sandwiched between them. The device is driven by a “floating” screw along its axis, with left and right threading and bearing two nuts, made in the form of wedges, which clamp the parts in each guide groove, as well as the screw self-installation to ensure uniform load distribution over grooves.

However, this mechanism has a leveling property in only two directions (grooves). In the grooves themselves, there is no equalization of pressure and, due to the sliding friction force, the clamping force decreases with distance from the drive. In addition, in view of the manufacturing errors of the prisms of the part in the grooves, it is impossible to precisely set along one basic axis. The disadvantage is that the method of fixing using these prisms is suitable only for round parts.

A multi-seat clamping device is known (see SU 1093467 A B 23 Q 3/06) for simultaneously securing several parts, made in the form of a housing with a base plate and a mechanism for clamping parts, which is a set of levers - a “rocker arm”, the essence of which is as follows. One small “rocker” equalizes the clamping force between the two parts, and two such “rockers” mounted on axles in an even larger one, which equalizes the clamping force between them, already clamp four parts.

and two such large "rocker arms", each of which has two small ones, fixed in an even larger one, allow clamping an even larger number of parts, etc. The disadvantage of this device is its large cumbersomeness and metal consumption.

The closest analogue to the proposed technical solution (prototype) is a multi-link articulated mechanism for simultaneously securing several parts, made in the form of links articulated between each other, with heel pressure elements (see SU 1028463 A, B 23Q 3/06). One row (upper) of the axes of this mechanism, connected to the closing link and the drive, in addition to the two extreme axes of this row, is located in the grooves, providing the possibility of "decoupling", i.e. the movement of the axes along the line of clamped parts, which serve to more evenly clamp them.

However, this mechanism does not provide reliable pressure equalization on the clamped parts, and at some (sharp) angles between adjacent links, the mechanism may jam (due to increased friction of the axes in the grooves).

The purpose of the utility model is to eliminate the above-mentioned disadvantages of known devices.

This goal is achieved by the fact that in the proposed multi-place clamping device containing a housing, a base plate, a lever mechanism with a drive that moves the clamp plunger of the workpiece, is made in the form of a sleeve-roller chain with the ability to move along the line of clamped parts in the channel of the housing, the rollers of which made with a radius exceeding the radius of rounding of the chain links. In addition, all the axles of the roller chain, except for one or two extreme with respect to the closing link, performing the supporting function, have the ability to move along the line of clamped parts. In this case, the device can be driven by a force directed along (parallel to) the line of clamped parts, or directed

perpendicularly. The clamp plungers are equipped with elastic elements to return to their original position when the force is removed from the drive. The device contains a removable cartridge for installing and removing workpieces.

The proposed device is shown in the drawing, in which Fig. 1 shows an embodiment of a device driven by a force directed along a line of clamped parts, and Fig. 2 shows a variant of a construction of a device driven by a force directed perpendicular to the line of clamped parts.

A multi-place clamping device (see Figs. 1 and 2) consists of a drive closing link 1 (not shown in the drawing), a housing 2, with clamp plungers 3 installed therein with elastic elements 4 (for example, in the form of rings) in contact with the clamped parts 5 installed in the cassette 6, the base plate 7, the lever mechanism 8 in the form of a sleeve-roller chain with a fixed axis (axes) 9 and rollers 10, the supporting surface (surfaces) 11.

Multiple clamping device operates as follows.

The force P from the power drive is transmitted through the closing link 1 to the lever mechanism 8, the links of which are able to move along the line of the clamped parts in the channel of the housing 2, the axis (s) 9 of which with the rollers 10 mounted on them abut against the supporting surface (surface) 11, as a result, the axes with rollers 10 in contact with the clamp plungers 3 move the latter, pressing parts 5 installed in the removable cartridge 6 to the base plate 7, compressing the elastic elements 4. When releasing the force P, the elastic elements 4 squeeze the clamp plunger 3, retraction contacting them with a roller axis 10, whereby the parts are released 5 (after processing) of the refill cassette 6. The possibility of translational movement ( "float") are both series axes of the lever mechanism 8 except at (extreme) 9 relative

to driving force; while the axis 9 through the rollers 10, abutting against the surface (surface) 11 remain stationary.

In the case of applying force P in the direction parallel to the line of clamped parts (see Fig. 1), the angle between adjacent links of the sleeve-roller chain 8 is less than 90 degrees, and in the case of applying force P in the direction perpendicular to the line of clamping parts (see Fig. 2 ) the angle between adjacent links of the sleeve-roller chain 8 take more than 90 degrees. The specific angles between the links of the sleeve-roller chain B in the proposed multi-seat fixture are determined depending on the design features of the fixture, the required clamping force and the number of workpieces. The embodiment shown in FIG. 2 is more complex and has large dimensions, but has less friction losses, due to the smaller number of links transmitting force P to each particular part. Moreover, his work is not affected by slight distortions of the closing link 1.

The proposed multi-seat device when using it, for example, when milling (grinding) grooves for hardening, allows to obtain an economic effect by increasing the number of simultaneously clamped parts, i.e. reduce time spent on processing one part and improve the quality of their processing, "because it allows you to clamp parts with a large difference in size, thanks to the use of the clamping mechanism of parts with significantly lower friction losses (compared with the prototype) and greater ability to equalize the force on the clamped parts.

Claims (6)

1. Multiple clamping device containing a housing, base melting, a linkage with a drive that moves the clamp plunger of the workpiece, characterized in that the linkage is made in the form of a sleeve-roller chain with the ability to move along the line of the clamped parts in the channel of the housing, the rollers of which made with a radius greater than the radius of the rounding of the chain links. 2. Multiple clamping device according to claim 1, characterized in that all the axles of the roller-chain, except for one or two extreme with respect to the closing link, performing the supporting function, have the ability to move along the line of clamped parts. 3. Multiple clamping device according to claim 1, characterized in that it is driven by a force directed along the line of clamped parts. 4. Multiple clamping device according to claim 1, characterized in that it is driven by a force directed perpendicular to the line of clamped parts. 5. Multiple clamping device according to claim 1, characterized in that the clamp plunger is provided with elastic elements for their return to their original position when the force is removed from the drive. 6. Multiple clamping device according to claim 1, characterized in that the installation and removal of the workpiece is carried out using a removable cartridge.