High-precision positioning clamp

Abstract

The utility model provides a high-precision positioning clamp, which belongs to the technical field of clamps and comprises a shell and a base. The shell is buckled on the base to form a clamp main body; a through hole is formed in the center of the clamp body. A driving gear is rotationally arranged in the clamp body. A plurality of sliding grooves are formed in the base; clamping blocks are arranged in the sliding grooves in a sliding mode. A driving rod is arranged on the top surface of the clamping block; the driving rod extends into an arc-shaped open groove formed in the driving gear. The number of the arc-shaped grooves is the same as that of the sliding grooves, and the arc-shaped grooves are used for driving the clamping blocks to slide in the sliding grooves through the driving rods. A driving gear meshed with the driving gear is arranged in the clamp main body; and the driving gear is in transmission connection with a driving motor arranged on the shell. The control device controls the driving motor to drive the clamping block to move, and accurate control over rotation of the driving gear can be achieved by controlling the number of turns of rotation of the driving motor, so that the clamping feeding distance of the clamping block is accurately controlled, and high-precision clamping is achieved.

Description

A high-precision positioning fixture Technical Field

[0001] This utility model relates to the field of clamping technology, specifically to a high-precision positioning clamp. Background Technology

[0002] In manufacturing fields such as machining and electronic assembly, positioning fixtures are key devices for workpiece positioning and fixation, and their clamping accuracy directly affects product processing quality and production efficiency. Mechanical clamping fixtures often rely on manual adjustment of bolts, nuts, and other components. This is susceptible to variations in operator experience and force, making it difficult to achieve stable and precise clamping force control, leading to workpiece positional shifts during clamping. Existing fixtures generally lack adaptive clamping capabilities for workpieces of different sizes and shapes, requiring frequent replacement or adjustment of fixture components. This not only increases production preparation time but also makes it difficult to guarantee consistent accuracy after multiple clamping operations. As the manufacturing industry moves towards precision and intelligence, the shortcomings of existing positioning fixtures in clamping accuracy control have become a bottleneck restricting product quality improvement. Therefore, this utility model provides a high-precision positioning fixture. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision positioning fixture.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0005] A high-precision positioning fixture includes: a housing and a base; the housing is fastened to the base to form a fixture body; the fixture body has a through hole at its center, and a drive gear is rotatably disposed inside; the drive gear has an opening at its center corresponding to the through hole;

[0006] The base has several sliding grooves arranged radially along the through hole and evenly distributed circumferentially along the through hole; the sliding grooves are connected to the through hole, and a clamping block is slidably disposed within them; a driving rod is provided on the top surface of the clamping block; the driving rod extends into an arc-shaped slot formed on the driving gear; the number of arc-shaped slots is the same as the number of sliding grooves, and each of the arc-shaped slots is opposite to each other and distributed around the through hole, for driving the clamping block to slide within the sliding groove via the driving rod;

[0007] The fixture body has a drive gear inside that meshes with the drive gear; the drive gear is connected to a drive motor mounted on the housing.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme, the fixture body has a chamfer at the through hole port.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme, a limit cap is provided at the top of the drive rod; the limit cap is located above the drive gear and extends at least partially outside the arc-shaped slot.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme, the slide groove has an I-shaped cross section; the cross section of the clamping block is adapted to the slide groove.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme, the end of the clamping block that can extend into the through hole has a trapezoidal structure, and the top of the trapezoid faces the center of the through hole.

[0012] The beneficial effects of this utility model are as follows: This utility model controls the operation of the drive motor through a control device, which drives the active gear to rotate. The active gear drives the drive gear to rotate, and the drive gear drives the drive rod to move through the arc-shaped slot. The drive rod drives the clamping block to move within the slide groove. When the clamping block moves inward, it clamps the workpiece; when it moves outward, it releases the workpiece. This utility model uses a control device to control the drive motor to move the clamping block. By controlling the number of rotations of the drive motor, precise control of the drive gear's rotation can be achieved, thereby accurately controlling the clamping feed distance of the clamping block and achieving high-precision clamping. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the structure of this utility model.

[0014] Figure 2 is a schematic diagram of the structure of this utility model after the shell is hidden.

[0015] Figure 3 is a schematic diagram of the base structure of this utility model.

[0016] Figure 4 is a schematic diagram of the clamping block structure of this utility model.

[0017] In the diagram: 1. Housing; 2. Base; 3. Drive gear; 4. Slide groove; 5. Clamping block; 6. Drive rod; 7. Arc-shaped slot; 8. Drive gear; 9. Drive motor; 10. Limit cap. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] As shown in Figures 1 and 2, a high-precision positioning fixture includes a housing 1 and a base 2. The housing 1 is fastened to the base 2 to form the fixture body. The fixture body is circular with a through hole in the center. A drive gear 3 and a driving gear 8 are rotatably mounted inside. The drive gear 3 is concentrically mounted with the fixture body and has an opening in its center corresponding to the through hole. The fixture body has a chamfer at the through hole opening to enlarge the opening and facilitate material loading and unloading. The drive gear 3 is rotatably connected to the fixture body via a plane bearing.

[0020] As shown in Figure 3, the base 2 has several grooves 4 arranged radially along the through hole and evenly distributed circumferentially along the through hole. One end of the groove 4 extends to connect with the through hole, the cross-section is I-shaped, and the top extends upward through the top surface of the base 2.

[0021] A clamping block 5 is slidably disposed within the slide groove 4. As shown in Figure 4, the cross-section of the clamping block 5 is I-shaped, corresponding to the slide groove 4, to ensure its sliding stability and to prevent longitudinal relative movement between the clamping block 5 and the slide groove 4. In addition, the end of the clamping block 5 that can extend into the through hole has a trapezoidal structure, and the top of the trapezoid faces the center of the through hole.

[0022] The top surface of the clamping block 5 is provided with an upward drive rod 6. The drive rod 6 extends into the arc-shaped slot 7 opened on the drive gear 3 and is adapted to the arc-shaped slot 7.

[0023] The number of arc-shaped slots 7 is the same as that of the sliding grooves 4, and each arc-shaped slot 7 is opposite to the others, evenly distributed around the through hole, used to drive the clamping block 5 to slide within the sliding groove 4 via the drive rod 6. Specifically, in this embodiment, there are five sliding grooves 4 and five arc-shaped slots 7, corresponding one-to-one with the sliding grooves 4. The arc-shaped slots 7 are arc-shaped, radially inclined relative to the drive gear 3, with the first end close to the opening and the second end close to the edge of the drive gear 3. When the drive gear 3 rotates, the arc-shaped slots 7 will drive the drive rod 6 to move radially along the drive gear 3, and the drive rod 6 will drive the clamping block 5 to slide within the sliding groove 4.

[0024] A limit cap 10 is provided at the top of the drive rod 6. The limit cap 10 is located above the drive gear 3 and extends at least partially outside the arc-shaped slot 7 to prevent the drive gear 3 from disengaging from the drive rod 6 and to improve the stability of the structure.

[0025] The fixture body contains a drive gear 8 that meshes with the drive gear 3. The drive gear 8 is connected to a drive motor 9 mounted on the housing 1. The drive motor 9 is connected to a control device, which controls the number of rotations of the drive motor 9, thereby controlling the number of rotations of the drive gear 8, and thus controlling the angle of rotation of the drive gear 3, achieving precise control of the feed amount of the clamping block 5. The control accuracy varies with the number of teeth on the drive gear 3; the more teeth, the more precise the control.

[0026] After receiving the command, the drive motor 9 starts, driving the drive gear 8 to rotate. The drive gear 8, through the transmission mechanism, moves the clamping block 5 towards the workpiece until it is clamped. After processing, the drive motor 9 reverses, and the clamping block releases the workpiece. A pressure sensor is installed at the contact point between the clamping block and the workpiece. When the clamping block clamps the workpiece, the pressure sensor monitors the clamping force in real time and converts the pressure signal into an electrical signal, which is then transmitted to the control system. The control system has a preset appropriate clamping force range. When the detected clamping force exceeds or falls below this range, the control system automatically adjusts the current or speed of the drive motor, thereby changing the rotation angle of the gear and the clamping force of the clamping block, so that the clamping force is always kept within a suitable range.

[0027] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A high-precision positioning fixture, characterized in that, include: A housing (1) and a base (2); the housing (1) is fastened to the base (2) to form a clamp body; the clamp body has a through hole in the center, and a drive gear (3) is rotatably arranged inside; the drive gear (3) has an opening in the center corresponding to the through hole; the base (2) has several sliding grooves (4) arranged radially along the through hole and evenly distributed around the circumference of the through hole; the sliding grooves (4) are connected to the through hole, and a clamping block (5) is slidably arranged inside them; a drive rod (6) is provided on the top surface of the clamping block (5); The drive rod (6) extends into the arc-shaped slot (7) opened on the drive gear (3); the number of arc-shaped slots (7) is the same as the number of sliding grooves (4), and each arc-shaped slot (7) is opposite to each other and distributed around the through hole, for driving the clamping block (5) to slide in the sliding groove (4) through the drive rod (6); the main body of the clamp is provided with a drive gear (8) that meshes with the drive gear (3); the drive gear (8) is connected to the drive motor (9) provided on the housing (1).

2. The high-precision positioning fixture according to claim 1, characterized in that, The fixture body has a chamfer at the through-hole port.

3. A high-precision positioning fixture according to claim 1, characterized in that, A limit cap (10) is provided at the top of the drive rod (6); the limit cap (10) is located above the drive gear (3) and extends at least partially outside the arc-shaped slot (7).

4. A high-precision positioning fixture according to claim 1, characterized in that, The slide (4) has an I-shaped cross section; the cross section of the clamping block (5) is adapted to the slide (4).

5. A high-precision positioning fixture according to claim 1, characterized in that, The end of the clamping block (5) that can extend into the through hole has a trapezoidal structure, and the top of the trapezoid faces the center of the through hole.

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