CN204321698U - A kind of jaw type self-centering clamping structure - Google Patents

Abstract

The utility model discloses a kind of jaw type self-centering clamping structure, comprise the chuck body coordinated with one end supporting and location of product workpiece and the clamping cylinder be vertically mounted on below this chuck body, penetratingly in chuck body be shaped with guiding slide opening, slide in this guiding slide opening to be provided with and control by clamping cylinder the compression resetting block that moves up and down, and the symmetrical movable locking being provided with two sides jaw types clamping product workpiece from product workpiece in chuck body, the center compressing resetting block is processed with the tapered wedges that slidingtype synchronously extrudes the movable locking opposite direction rotating clamping promoting both sides.The utility model structure is simple, and clamping stroke is short, saving space also can position product while clamping, effectively can solve the problem such as shake cutter, distortion that specialities cause because one end is unsettled.

Description

A Jaw Type Automatic Centering Clamping Structure

technical field

The utility model relates to the design technology of tooling fixtures in the mechanical processing industry, in particular to a centering clamping structure of tooling fixtures, in particular to a jaw type automatic centering clamping structure.

Background technique

Fixtures are one of the indispensable and important process equipment in the modern machinery industry. In recent years, with the rapid development of industries such as automobiles, motorcycles, and electric tools in my country, mechanical processing enterprises have sprung up like mushrooms. At the same time, the complete machine factories have higher and higher requirements for the quality of the required components, and the prices are getting lower and lower; the competition among machining enterprises is becoming more and more fierce. Competition leads to the inevitable requirement of enterprises to improve fixtures in order to improve the manufacturing accuracy, stability and flexibility of fixtures.

At present, some products to be processed can only be provided with support pins at one end, and a main positioning pin is used for positioning and pressing, and the other end needs to be suspended due to the need for processing and other special size requirements. Therefore, the processing end of this type of product cannot be clamped from the front, and support pins cannot be added at the bottom of the product, so the degree of freedom of the product is not completely restricted, resulting in the phenomenon of tool vibration and deformation when the other end of the product is processed, resulting in product failure. Quality issues.

Contents of the invention

The technical problem to be solved by the utility model is to provide a jaw type automatic centering clamp with simple structure, short clamping stroke, space saving and the ability to position the product while clamping. tight structure.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a jaw type automatic centering clamping structure, including a clamp body that is matched with one end of the product workpiece and a clamping cylinder vertically installed under the clamp body , the fixture body is transparently formed with a guide slide hole, and a compression reset block that is controlled by the clamping cylinder to move up and down is slid in the guide slide hole, and the left and right sides of the fixture body are symmetrically provided with jaws from both sides of the product workpiece. The active locking block for clamping the product workpiece, the center of the pressing and reset block is processed with a sliding wedge block that is synchronously extruded to push the active locking blocks on both sides to rotate and clamp in opposite directions.

In order to optimize the above technical solutions, the measures taken also include:

The above-mentioned fixture body is provided with a fixed baffle, and the fixed baffle is installed with a fixed pin that rotates through the movable locking block.

The fixture body is provided with four fixed baffles, and each movable locking block is movably positioned between the two fixed baffles.

The two sides of the above pressing and reset block are processed with auxiliary pressing blocks that cooperate with the back of the movable locking block to limit the rotation range of the movable locking block, and there is a guiding slide between the auxiliary pressing block and the wedge block to prevent the movable locking block from moving in series. cavity.

Both sides of the above-mentioned wedge block are formed with inclined surfaces that slide and fit with the corresponding movable locking block, and the longitudinal section view of the wedge block has a trapezoidal structure.

The upper end of the above-mentioned auxiliary pressing block is formed with a circular-arc hook, and the circular-arc hook plays an auxiliary role and cooperates with the back side of the movable locking block.

The center of the above-mentioned movable locking block is formed with a shaft hole through which the fixed pin penetrates, and the movable locking block can rotate limitedly with the fixed pin as the rotation axis.

The front end of the above-mentioned clamping cylinder is fixedly equipped with a cylinder connecting rod, and the bottom surface of the compression reset block is formed with a connecting groove fixedly connected with the front end of the cylinder connecting rod.

Compared with the prior art, the fixture body of the utility model is transparently formed with a guide slide hole, and a compression reset block that is controlled by the clamping cylinder to move up and down is slidably arranged in the guide slide hole, and the left and right symmetrical sides of the fixture body There is an active locking block that clamps the product workpiece from both sides of the product workpiece in the jaw type, and the center of the pressing and reset block is processed with a sliding wedge block that pushes the movable locking blocks on both sides to rotate and clamp in the opposite direction. .

The utility model uses the clamping cylinder to push and compress the reset block, and squeezes the movable locking block through the inclined surface of the compressed reset block, thereby realizing the position limitation and clamping of the product workpiece, and the compression reset block and the movable locking block are wedge-shaped Cooperating with the upward thrust of the clamping cylinder, it is converted into a supporting force on both sides of the product workpiece and a downward clamping force to ensure the precise positioning of the product workpiece. The utility model solves the problems of tool vibration and deformation caused by one end of the product hanging in the air, and can automatically position the product while clamping the product workpiece, saving space and reducing the difficulty of fixture manufacturing. This structure adopts the wedge clamping structure , Only a small cylinder can clamp the product, saving cost.

Description of drawings

Fig. 1 is the sectional structural representation of the utility model;

Fig. 2 is a top view when the utility model and the product workpiece are clamped;

Fig. 3 is the E-E direction sectional view of Fig. 2;

Fig. 4 is the top view of the utility model;

Fig. 5 is a schematic structural view of the compression reset block in Fig. 1;

Fig. 6 is a structural schematic view of the product workpiece viewed from the pressing end.

Detailed ways

Embodiments of the utility model are described in further detail below in conjunction with the accompanying drawings.

Fig. 1 to Fig. 5 are the structural representations of the utility model.

The reference signs are: product workpiece A, slope B, arc hook C, fixture body 1, clamping cylinder 2, compression reset block 3, guide sliding cavity 3a, connecting groove 3b, wedge block 31, auxiliary pressure Block 32, movable locking block 4, fixed baffle plate 5, fixed pin 6, cylinder connecting rod 7.

Figures 1 to 5 are schematic structural views of the utility model. As shown in the figures, a jaw type automatic centering clamping structure of the utility model includes a clamp body 1 that is matched with one end of the product workpiece A for supporting positioning and a vertical The clamping cylinder 2 installed under the clamp body 1 is provided with a guide slide hole through the clamp body 1, and a compression reset block 3 controlled by the clamp cylinder 2 to move up and down is slidably arranged in the guide slide hole, and the clamp The body 1 is left and right symmetrically provided with movable locking blocks 4 that clamp the product workpiece A from both sides of the product workpiece A in the jaw type, and the center of the pressing and reset block 3 is processed with sliding type synchronous extrusion to push the movable locks on both sides. The wedge block 31 that the tight block 4 rotates and clamps oppositely. In the prior art, due to the special structure of some products, workpieces can only be processed by means of one end being suspended in the air and the other end being clamped and fixed. Since the processing end of this type of product cannot be clamped from the front, and support pins cannot be added to the bottom of the product, the degree of freedom of the product is not completely restricted, resulting in problems such as tool vibration and deformation when the other end of the product is processed. The utility model utilizes the pressing reset block 3 and the movable locking block 4 to form a wedge-type clamping structure, and converts the upward thrust of the clamping cylinder 2 into a jaw-type clamping force on both sides of the product workpiece A and a downward force. The clamping force, the design of the wedge structure not only has a short stroke, but also saves space, which effectively reduces the difficulty of making the fixture, and also enables the product workpiece A to have an appropriate clamping effect due to the difference in force on both sides during the clamping process. The ability to swipe left and right for automatic centering. The jaw type automatic centering clamping structure of the utility model can clamp the product when the product needs to be processed in a special area and it is inconvenient to support, center and compress the product, and solves the problem of knife vibration caused by one end of the product hanging in the air. Deformation problem, and the wedge clamping structure, only needs a small cylinder to clamp the product, saving cost.

In the embodiment, the fixture body 1 is provided with a fixed baffle 5 , and the fixed baffle 5 is installed with a fixed pin 6 rotatably penetrating with the movable locking block 4 .

In the embodiment, four fixed baffles 6 are arranged on the fixture body 1 , and each movable locking block 4 is movably positioned between two fixed baffles 5 .

The center of the movable locking block 4 is formed with a shaft hole through which the fixed pin 6 passes, and the movable locking block 4 can rotate in a limited manner with the fixed pin 6 as the rotation axis.

In the embodiment, the two sides of the pressing and reset block 3 are processed with auxiliary pressing blocks 32 that cooperate with the back of the movable locking block 4 to limit the rotation range of the movable locking block 4, and an auxiliary pressing block 32 is formed between the auxiliary pressing block 32 and the wedge block 31 to prevent The movable locking block 4 moves in series and guides the slide chamber 3a.

The fixed pin 6 passes through the movable locking block 4 to fix it between the two fixed plates 5, and controls the height of the movable locking block 4 so that its part is placed in the guide slide cavity 3a of the compression reset block 3, so as to avoid The movable locking block 4 slides freely along the fixed pin 6 .

In the embodiment, both sides of the wedge block 31 are formed with slopes B that slide with the corresponding movable locking block 4 , and the longitudinal cross-sectional view of the wedge block 31 has a trapezoidal structure.

In the embodiment, the upper end of the auxiliary pressing block 32 is formed with a circular-arc hook C, and the circular-arc hook C plays an auxiliary role and cooperates with the back of the movable locking block 4 .

In the embodiment, the front end of the clamping cylinder 2 is fixedly equipped with a cylinder connecting rod 7 , and the bottom surface of the compression reset block 3 is formed with a connecting groove 3b fixedly connected with the front end of the cylinder connecting rod 7 .

The working process of the present utility model is as follows.

Figure 2 and Figure 3 are schematic structural views of the utility model in working state, and Figure 6 is a structural schematic view of the product workpiece viewed from the pressing end. As shown in the figure, after the processing of the product workpiece A is completed, the clamping cylinder 2 retreats, and the cylinder connecting rod 7 pulls the compression reset block 3 to loosen the movable locking block 4, and the compression reset block 3 pulls down. In the process of compressing the arc pull hook C on both sides of the reset block 3, the auxiliary movable locking block 4 is relaxed to the reset state, and at this time, the product workpiece A can be taken out.

In the same way, the workpiece A to be processed is placed on the fixture body 1, and the clamping cylinder 2 pushes the connecting rod 7 of the cylinder. Press the movable locking block 4 to make it rotate around the fixed pin 6 to clamp the product workpiece A.

Although the utility model has been illustrated and described with reference to preferred examples, it will be understood by those skilled in the art that various changes in form and details may be made within the scope of the claims.

Claims (8)

1. a jaw type self-centering clamping structure, comprise the chuck body (1) coordinated with one end supporting and location of product workpiece (A) and the clamping cylinder (2) being vertically mounted on this chuck body (1) below, it is characterized in that: described chuck body (1) is above penetrating is shaped with guiding slide opening, slide in this guiding slide opening to be provided with and control by clamping cylinder (2) the compression resetting block (3) that moves up and down, and described chuck body (1) is above symmetrical is provided with the movable locking (4) clamping product workpiece (A) from the two sides jaw type of product workpiece (A), the center of described compression resetting block (3) is processed with the tapered wedges (31) that slidingtype synchronously extrudes movable locking (4) the opposite direction rotating clamping promoting both sides.

2. a kind of jaw type self-centering clamping structure according to claim 1, it is characterized in that: described chuck body (1) is provided with fixed dam (5), this fixed dam (5) is provided with the steady pin (6) rotating with movable locking (4) and wear.

3. a kind of jaw type self-centering clamping structure according to claim 2, it is characterized in that: described chuck body (1) is provided with four pieces of fixed dams (5), the equal activity orientation of the movable locking (4) described in each is between two pieces of fixed dams (5).

4. a kind of jaw type self-centering clamping structure according to claim 3, it is characterized in that: the both sides of described compression resetting block (3) are processed with the auxiliary briquetting (32) coordinating with movable locking (4) back side and limit movable locking (4) slewing area, and auxiliary being formed between briquetting (32) and tapered wedges (31) prevents movable locking (4) vibration to lead cunning chamber (3a).

5. a kind of jaw type self-centering clamping structure according to claim 4, it is characterized in that: the both sides of described tapered wedges (31) are shaped with the inclined-plane (B) be slidably matched with respective activity latch segment (4), and the longitudinal sectional view of this tapered wedges (31) is trapezium structure.

6. a kind of jaw type self-centering clamping structure according to claim 5, it is characterized in that: the upper end of described auxiliary briquetting (32) is shaped with circular arc drag hook (C), this circular arc drag hook (C) helps out matching with the back side of movable locking (4) of formula.

7. a kind of jaw type self-centering clamping structure according to claim 6, it is characterized in that: the center of described movable locking (4) is shaped with the shaft hole that steady pin (6) wears, and this movable locking (4) can with steady pin (6) for axis of rotation restricted rotational movement.

8. a kind of jaw type self-centering clamping structure according to claim 6, it is characterized in that: the front end of described clamping cylinder (2) is installed with cylinder connecting rod (7), the bottom surface of described compression resetting block (3) is shaped with the link slot (3b) be fixedly linked with cylinder connecting rod (7) front end.