CN201030520Y

CN201030520Y - Self-centering eccentric wheel type hydraulic clamp

Info

Publication number: CN201030520Y
Application number: CNU2007201405759U
Authority: CN
Inventors: 邵培森
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-16
Filing date: 2007-03-16
Publication date: 2008-03-05
Anticipated expiration: 2017-03-16

Abstract

A hydraulic clamp of self-centering and eccentric wheel type comprises a symmetrical double eccentric wheel and a double V-shaped clamps with positioning function, wherein the double V-shaped clamps are symmetrically fixed on a sledge A and a sledge B separately, and a toothed bar is pushed by a hydraulic cylinder, then rotating of the double eccentric wheel is pushed by the toothed bar, two sledges are closed up to the center simultaneously and synchronously aiming to clamp the work-piece, further a round shaft end of an eccentric wheel shaft of a gear is constrained by a positioning aperture on the bottom of a clamping seat, thereby high positioning accuracy is achieved and automatic control of the clamp folding is easily achieved.

Description

Self-centering Eccentric Wheel-type Hydraulic Clamp

One, technical field

The utility model relates to a kind of Self-centering Eccentric Wheel-type Hydraulic Clamp, and it belongs to the jig technical field.

Two, background technology

The application of jig is very extensive in the machining, and of a great variety, and along with the progressively raising of automaticity, hydraulically powered anchor clamps are used in a large number.Centering and clamping mechanism mainly contains Wedge type centering, spiral centering, centering type centering and elastic centering etc. at present, but be mainly used in manual clamp mechanism, and the hydraulic stator clamp mechanism only is applied to hinge clamping mechanism, its structure is complicated, the rigidity deficiency, positioning accuracy is lower.

Three, summary of the invention

Complicated for solving existing hydraulic stator clamp mechanism structure, the rigidity deficiency, the problem that positioning accuracy is lower, the utility model provides a kind of Self-centering Eccentric Wheel-type Hydraulic Clamp.This clamp utilizes the structure of symmetric double eccentric wheel and two V-arrangement jaws can solve the problem that existing hydraulic stator clamp mechanism exists effectively, and can realize the automation control of clamp folding like a cork.

The technical solution adopted in the utility model is: a kind of Self-centering Eccentric Wheel-type Hydraulic Clamp, comprise the pincers seat, the gear camshaft, tooth bar, pressing plate, oil cylinder, the oil cylinder connecting plate, V-arrangement jaw A, slide A, back-moving spring, V-arrangement jaw B, slide B, baffle plate etc., it is characterized in that: pincers seat bottom surface is provided with the circular shaft end of a setting circle hole and gear camshaft and does rotation movingly, the top of pincers seat both sides wallboard respectively is provided with an outside convex shoulder, one end face and the oil cylinder connecting plate of both sides wallboard are connected, the other end and the baffle plate of both sides wallboard are connected, oil cylinder is fixed on the oil cylinder connecting plate, oil cylinder piston bar and tooth bar are connected, the gear of rack and pinion camshaft interlude is meshed, can slide on the end face of pincers seat both sides wallboard in the bottom surface of slide A and slide B, V-arrangement jaw A is fixed on the slide A end face, V-arrangement jaw B is fixed on the slide B end face, slide A is spill, the bottom of groove has its height of a projection to equate with the eccentric wheel of gear camshaft in the bottom surface, slide B is convex, the top of convex shoulder has its height of a projection to equate with the eccentric wheel of gear camshaft in the bottom surface, the projection of two slides forms a coffin after the groove fit of the convex shoulder of slide B and slide A in the bottom, the eccentric wheel of gear camshaft is the bidirectional eccentric wheel of symmetry, be placed in this coffin, the projection of slide A and slide B two slides under the active force of back-moving spring is near eccentric wheel, outermost two side bottoms of slide A and slide B are provided with convex shoulder, the inner distance of two convex shoulders matches with the convex shoulder side dimension on pincers seat wallboard top, both sides, its height matches with the convex shoulder height on pincers seat wallboard top, both sides, and pressing plate is fixed on the bottom side of convex shoulder.

Two V-arrangement jaws that the utility model has adopted symmetrical double eccentric wheel and had positioning function, the circular shaft end of gear camshaft is subjected to clamping a constraint of bottom surface positioning round orifice in addition, and positioning accuracy is improved greatly.Control the folding of clamp by hydraulic system, clamp is under the state of opening, eccentric minor axis contacts with the projection of slide A and slide B bottom, this moment, the distance of V-arrangement jaw A and V-arrangement jaw B was maximum, when the A chamber of oil cylinder injection pressure oil B chamber leads to fuel tank, piston rod is pushed out and promotes tooth bar and moves, the mobile gear camshaft that makes of tooth bar serves as that axle is rotated with the center of pincers seat bottom surface positioning round orifice, variation (less than 90 °) along with the anglec of rotation, the contact point of the projection of eccentric wheel and slide A and slide B bottom is changed to major axis by minor axis, and its variation will make slide A and slide B draw close to the center synchronously simultaneously.Until workpiece is clamped; Otherwise when the B chamber of oil cylinder injection pressure oil A chamber led to fuel tank, piston rod was pushed back and spurs tooth bar and moves, and the contact point of the projection of eccentric wheel and slide A and slide B bottom was changed, until original opening to minor axis by major axis.

The beneficial effects of the utility model are: it is complicated to solve existing hydraulic stator clamp mechanism structure, the rigidity deficiency, and the problem that positioning accuracy is lower, and can realize the automation control of clamp folding like a cork.

Four, description of drawings

Below in conjunction with drawings and Examples the utility model is described in detail:

Fig. 1 is a structure chart of the present utility model

Five, the specific embodiment

With reference to Fig. 1, shown in Figure 2, a kind of Self-centering Eccentric Wheel-type Hydraulic Clamp comprises that (12) such as pincers seats (1), a gear camshaft (2), tooth bar (3), pressing plate (4), oil cylinder (5), oil cylinder connecting plate (6), V-arrangement jaw A (7), slide A (8), back-moving spring (9), V-arrangement jaw B (10), slide B (11), baffle plates etc. constitute.Pincers seat (1) bottom surface is provided with the circular shaft end of a setting circle hole and gear camshaft (2) and does rotation movingly, the top of pincers seat (1) both sides wallboard respectively is provided with an outside convex shoulder, one end face of both sides wallboard and oil cylinder connecting plate (6) are connected, the other end of both sides wallboard and baffle plate (12) are connected, oil cylinder (5) is fixed on the oil cylinder connecting plate (6), oil cylinder piston bar and tooth bar (3) are connected, tooth bar (3) is meshed with the gear of gear camshaft (2) interlude, slide A (8) can slide on the end face of pincers seat (1) both sides wallboard with the bottom surface of slide B (11), V-arrangement jaw (7) is fixed on slide A (8) end face, V-arrangement jaw B (10) is fixed on slide B (11) end face, slide A (8) is spill, the bottom of groove has its height of a projection and the eccentric wheel of gear camshaft (2) mutually in the bottom surface, slide B (11) is convex, the top of convex shoulder has its height of a projection to equate with the eccentric wheel of the inclined to one side wheel shaft of gear (2) in the bottom surface, the projection of two slides forms a coffin after the groove fit of the convex shoulder of slide B (11) and slide A (8) in the bottom, the eccentric wheel of gear camshaft (2) is the bidirectional eccentric wheel construction of symmetry, be placed in this coffin, the projection of slide A (8) and slide B (11) two slides under the active force of back-moving spring (9) is near eccentric wheel, slide A (8) is provided with convex shoulder with outermost two side bottoms of slide B (11), the inner distance of two convex shoulders matches with the convex shoulder side dimension on pincers seat wallboard top, (1) both sides, its height matches with the convex shoulder height on pincers seat wallboard top, (1) both sides, and pressing plate (12) is fixed on the bottom side of convex shoulder.

The utility model is controlled the folding of clamp by hydraulic system, clamp is under the state of opening, eccentric minor axis contacts with the projection of slide A (8) and slide B (11) bottom, this moment V-arrangement jaw A (7) and V-arrangement jaw B (10) the spacing maximum, when the A chamber of oil cylinder (5) injection pressure oil B chamber leads to fuel tank, the piston rod of oil cylinder (5) is pushed out and promotes tooth bar (3) and moves, the mobile gear camshaft (2) that makes of tooth bar (3) serves as that axle is rotated with the center of pincers seat (1) bottom surface positioning round orifice, variation (less than 90 °) along with the anglec of rotation, the contact point of the projection of eccentric wheel and slide A (8) and slide B (11) bottom is changed to major axis by minor axis, its variation will make slide A (8) and slide B (11) draw close to the center synchronously simultaneously, until workpiece is clamped; Otherwise when the B chamber of oil cylinder (5) injection pressure oil A chamber leads to fuel tank, the piston rod of oil cylinder (5) is pushed back and spurs tooth bar (3) and moves, the contact point of the projection of eccentric wheel and slide A and slide B bottom is changed to minor axis by major axis, slide A (8) and slide B (11) are outwards opened synchronously, until initial opening under the active force of back-moving spring (9) simultaneously.

Claims

1. Self-centering Eccentric Wheel-type Hydraulic Clamp, comprise the pincers seat, the gear camshaft, tooth bar, pressing plate, oil cylinder, the oil cylinder connecting plate, V-arrangement jaw A, slide A, back-moving spring, V-arrangement jaw B, slide B, baffle plate etc., it is characterized in that: pincers seat bottom surface is provided with the circular shaft end of a setting circle hole and gear camshaft and does rotation movingly, one end face and the oil cylinder connecting plate of both sides wallboard are connected, oil cylinder is fixed on the oil cylinder connecting plate, oil cylinder piston bar and tooth bar are connected, the gear of rack and pinion camshaft interlude is meshed, slide A is spill, there is a projection bottom of groove in the bottom surface, slide B is convex, there is a projection on the top of convex shoulder in the bottom surface, the projection of two slides forms a coffin after the groove fit of the convex shoulder of slide B and slide A in the bottom, the eccentric wheel of gear camshaft is the bidirectional eccentric wheel of symmetry, be placed in this coffin, V-arrangement jaw A is fixed on the slide A end face, V-arrangement jaw B is fixed on the slide B end face, can slide on the end face of pincers seat both sides wallboard in the bottom surface of slide A and slide B.

2. a kind of Self-centering Eccentric Wheel-type Hydraulic Clamp according to claim 1, it is characterized in that: the top of pincers seat both sides wallboard respectively is provided with an outside convex shoulder, outermost two side bottoms of slide A and slide B are provided with convex shoulder, the inner distance of two convex shoulders matches with the convex shoulder side dimension on pincers seat wallboard top, both sides, its height matches with the convex shoulder height on pincers seat wallboard top, both sides, and pressing plate is fixed on the bottom side of slide A and slide B outermost two side bottom convex shoulders.