CN201881106U

CN201881106U - Pressure-balanced double-point pressing mechanism

Info

Publication number: CN201881106U
Application number: CN2010205792644U
Authority: CN
Inventors: 李占营; 年雪山; 张军学
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2010-10-27
Filing date: 2010-10-27
Publication date: 2011-06-29
Anticipated expiration: 2020-10-27

Abstract

The utility model provides a pressure-balanced double-point pressing mechanism, which is used for solving the problem that the pressing force applied to two work pieces by a double-point pressing mechanism is inconsistent. The pressure-balanced double-point pressing mechanism comprises an air cylinder, a pressing arm and a double-point pressing block, wherein an air cylinder rod is articulated with the pressing arm. The mechanism has the improvement that a connecting seat is arranged between the pressing arm and the double-point pressing block, the connecting seat is fixedly connected with the pressing arm, the middle of the double-point pressing block is articulated with the connecting seat by a hinge pin, and a gap is remained between the upper surface of the double-point pressing block and the lower surface of the connecting seat which corresponds to the upper surface. A pressing force is transferred to two pressing points which are not influenced with each other by the lever principle, so that the force applied to the two work pieces to be pressed is guaranteed to be blanched. The mechanism has the beneficial effects that the pressing force of the two work pieces is balanced and can not be influenced by the machining error of the work pieces, so that the quality of a product is stable; and the mechanism effectively prevents the clamping from being unavailable, so that the bad product or the waste product caused by the unavailable clamping can be completely avoided.

Description

A kind of two point hold-down mechanism of isostasy

Technical field

The utility model relates to a kind of clamp mechanism that is used for the vehicle body soldering anchor clamps, belongs to automobile technical field.

Background technology

At automobile manufacturing enterprise, the automobile body welding operation need use frock that bodywork parts is fixed, when the clamping unit to the vehicle body soldering anchor clamps designs, under a lot of situations, owing to the site space restriction or in order to save cylinder, often have a cylinder clamping unit and contain two mechanisms that compress a little, be referred to as the two point hold-down mechanism.The structure of described two point hold-down mechanism is as shown in Figure 4: being connected adopt between two point compact heap 6 and the clamping arm 3 is rigidly connected, because welded part exists foozle, when two of two point compact heap compress a little to Work-sheet pressing, must there be one to compress a first contact workpiece, a contact workpiece after another compresses, its result often causes two clamping points well not implement to compress to two workpiece simultaneously, when the foozle of two workpiece is big, might forms one of them and compress a little to satisfy and compress requirement and cause compressing inefficacy.

The utility model content

The utility model is used to solve the defective of above-mentioned prior art and a kind of two point hold-down mechanism that all can guarantee the isostasy that reliably compresses to two workpiece pressings is provided.

The alleged problem of the utility model solves by the following technical programs:

A kind of two point hold-down mechanism of isostasy, comprise cylinder, clamping arm and two point compact heap in the formation, the hinged clamping arm of cylinder rod wherein, special feature is: be provided with Connection Block between described clamping arm and the two point compact heap, the affixed clamping arm of Connection Block, two point compact heap middle part is by the bearing pin seat that is articulated and connected, and leaves the gap between the described two point compact heap upper surface Connection Block lower surface corresponding with its position.

The two point hold-down mechanism of above-mentioned isostasy, the gap H between described two point compact heap upper surface and the Connection Block lower surface is the 2-3 millimeter.

The utility model improves the inconsistent problem of the thrust of two workpiece at existing two point hold-down mechanism, this mechanism is at the two point compact heap and compress and set up Connection Block between the swing arm, Connection Block with compress swing arm be rigidly connected, with the two point compact heap hinged, like this, a thrust is passed through lever principle, pass to two compressing a little of being independent of each other, guarantee that finally two are pressed the workpiece stress equalization.The utility model effect is as follows: make the equilibrium of two Work-sheet pressing power, be not subjected to the influence of workpiece machining error, guarantee product with stable quality, lost efficacy owing to effectively avoid clamping, thereby stopped bad product or waste product that therefore reason produced.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the structural representation of two point compact heap and Connection Block;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is a two point hold-down mechanism structural representation before improving.

Label is as follows in the accompanying drawing: 1. cylinder, 2. cylinder rod, 3. clamping arm, 4. Connection Block, 5. bearing pin, 6. two point compact heap, 7. back-up block.

The specific embodiment

Referring to Fig. 1, during constituting, the utility model comprises cylinder 1, clamping arm 3 and two point compact heap 6, cylinder rod 2 hinged clamping arms 3 wherein, the clamping arm bottom is supported by back-up block 7.

Referring to Fig. 1-3, the utility model is set up Connection Block 4 between clamping arm 3 and two point compact heap 6, the affixed clamping arm of Connection Block, and two point compact heap middle part is by bearing pin 5 seat that is articulated and connected, leave gap H between the two point compact heap upper surface Connection Block lower surface corresponding with its position, H is the 2-3 millimeter.

Still referring to Fig. 1, operation principle of the present utility model is as follows: during workpiece pressing, the active force of cylinder 1 is through cylinder rod 2, clamping arm 3 passes to Connection Block 4, by Connection Block 4 thrust is passed to two point clamp 6 by pivot pin 5 again, 2-3 mm clearance between double end compact heap upper surface and the Connection Block lower surface, make the two point compact heap can carry out the swing of certain angle around pivot pin, such thrust is delivered to two application points by lever principle, and can guarantee that two thrusts that compress a little can not influence each other, the final realization clamps the equilibrium of two workpiece.

Claims

1. the two point hold-down mechanism of an isostasy, comprise cylinder, clamping arm and two point compact heap in the formation, the hinged clamping arm of cylinder rod wherein, it is characterized in that: be provided with Connection Block (4) between described clamping arm (3) and the two point compact heap (6), the affixed clamping arm of Connection Block, two point compact heap middle part is by bearing pin (5) seat that is articulated and connected, and leaves the gap between the described two point compact heap upper surface Connection Block lower surface corresponding with its position.

2. the two point hold-down mechanism of isostasy according to claim 1, it is characterized in that: the gap H between described two point compact heap upper surface and the Connection Block lower surface is the 2-3 millimeter.