Clamping and self-locking device of main shaft of detection instrument for parts

Abstract

The invention discloses a part clamping and self-locking device of a main shaft of a detection instrument, which comprises a main shaft support frame, a plurality of hyperbolic clamping jaws and a spiral chuck, and is characterized in that the main shaft support frame is provided with a central hole for placing a part to be detected and is uniformly provided with a plurality of hyperbolic clamping jaw chutes in the circumferential direction; the extending axes of the hyperbolic clamping jaw sliding grooves are converged to the position of the center hole. The multiple hyperbolic clamping jaws are arranged in the hyperbolic clamping jaw sliding grooves in a sliding mode. The volute chuck is installed on the main shaft supporting frame and drives all the hyperbolic clamping jaws to synchronously move to the position of the center hole in the same direction, and the hyperbolic clamping jaws jointly clamp a part to be detected. The method has the beneficial effects that 1, the operation is simple and quick; 2, the detection efficiency is high; and 3, popularization in factories is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of parts clamping equipment used in testing instruments, and in particular to a self-locking device for clamping parts of a main shaft of a testing instrument. Background Art

[0002] At present, factory precision measuring equipment such as roundness testers, contour testers, three-coordinate measuring machines, and universal display machines require appropriate clamping force when testing parts, and require that they cannot loosen after clamping. Because the clamping force required for testing is relatively small, if a wrench is used for clamping, the torque cannot be controlled. If the torque is relatively small, the product will loosen, and if the torque is relatively large, the product will deform, resulting in testing errors and even damage to the spindle. When other clamping methods are used, the operation is inconvenient and it is easy to loosen. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a self-locking device for clamping the spindle of a detection instrument to parts, which reduces labor intensity, improves work efficiency, ensures accurate detection and enables the spindle to self-lock. A self-locking device for clamping a detection instrument.

[0004] In order to achieve the above-mentioned purpose of the invention, a self-locking device for clamping a spindle of a testing instrument to a part of the present invention comprises:

[0005] A spindle support frame; a center hole for placing the part to be inspected is provided on the spindle support frame and a plurality of hyperbolic claw slide grooves are evenly distributed circumferentially, and the extended axes of the plurality of hyperbolic claw slide grooves converge to the center hole position;

[0006] A hyperbolic claw slidably disposed in each hyperbolic claw slot;

[0007] A worm chuck is installed on the spindle support frame, and the worm chuck drives all the hyperbolic jaws to move synchronously and in the same direction to the center hole position to jointly clamp the part to be inspected.

[0008] In a preferred embodiment of the present invention, after the hyperbolic claw clamps the part to be inspected, the top of the claw tip will be slightly deformed, and the reverse force generated at both ends of the hyperbolic claw curve and the force generated by the micro-deformation of the hyperbolic claw are superimposed to form a self-locking force, thereby maintaining the clamping force on the part to be inspected.

[0009] In a preferred embodiment of the present invention, the hyperbolic claw is made of brass or aluminum alloy.

[0010] The invention adopts a specially made hyperbolic claw and a circular spiral chuck, and the top of the hyperbolic claw tip keeps in line contact, so that the micro-deformation force is always conducive to self-locking.

[0011] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. Simple and fast operation; 2. High detection efficiency; 3. High factory penetration rate BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a front view of a clamping self-locking device for a detection instrument.

[0013] Figure 2 This is an auxiliary view of a clamping self-locking device for a detection instrument of the present invention.

[0014] Figure 3 The present invention is a cross-sectional view of a clamping self-locking device for a detection instrument.

[0015] Figure 4 The exploded view of the clamping self-locking device for a detection instrument of the present invention.

[0016] Figure 5 The present invention is a contact line force diagram of a hyperbolic claw of a clamping self-locking device for a detection instrument and a circular spiral chuck when in use. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below, but the present invention is not limited to the scope of the embodiments.

[0018] See also Figure 1 The figure shows a self-locking device for clamping a spindle of a testing instrument on a part, comprising: a spindle support frame 1, a spiral chuck 2, and a hyperbolic claw 3. The spindle support frame 1 is provided with a center hole 1a for placing the part to be tested and six hyperbolic claw grooves 1b are evenly distributed circumferentially, and the extended axes of the six hyperbolic claw grooves 1b converge to the position of the center hole 1a.

[0019] There are six hyperbolic claws 3 made of brass or alloy aluminum. The six hyperbolic claws 3 are slidably arranged in each hyperbolic claw slot 1b. The worm chuck 2 is mounted on the spindle support frame 1.

[0020] The worm chuck 2 is rotated clockwise, and the worm chuck 2 drives all the hyperbolic claws 3 to move synchronously and in the same direction to the center hole 1a, and jointly clamps the part 4 to be tested placed in the center hole 1a of the spindle support frame 1. After the test, the worm chuck 2 is rotated counterclockwise to drive all the hyperbolic claws 3 to move synchronously and in the same direction away from the center hole 1a, so that the hyperbolic claws 3 are separated from the part 4 to be tested, and the part 4 to be tested can be taken out.

[0021] After the hyperbolic claw 3 clamps the part to be inspected 4, the top of the claw tip of the hyperbolic claw 3 will be slightly deformed. The reverse force generated at both ends of the curve of the hyperbolic claw 3 and the force generated by the micro-deformation of the hyperbolic claw 3 are superimposed to form a self-locking force, thereby maintaining the clamping force on the part to be inspected 4.

[0022] The working principle of the present invention is as follows:

[0023] By rotating the worm chuck 2, the six hyperbolic claws 2 are driven to move synchronously toward the center, and the six hyperbolic claws 2 clamp the part 4 to be tested at the same time. The reverse force generated at both ends of the curve 2a of the hyperbolic claw 2 and the force generated by the micro-deformation of the hyperbolic claw 2 are superimposed to form a self-locking force, thereby maintaining the clamping force on the part 4 to be tested. Since the self-locking force formed by the micro-deformation force of the claw of the hyperbolic claw 2 and the reverse force generated at both ends of the curve is about 10N.m, when operating, the worm chuck 2 is twisted in the opposite direction by hand, and the device can be quickly released after the hyperbolic end point of the hyperbolic claw 2 leaves the worm contact line, thereby achieving the purpose of both clamping and self-locking, and quick release.

Claims

1. A self-locking device for clamping a spindle of a testing instrument to a part, characterized in that: include: A spindle support frame; a center hole for placing the part to be inspected is provided on the spindle support frame and a plurality of hyperbolic claw slide grooves are evenly distributed circumferentially, and the extended axes of the plurality of hyperbolic claw slide grooves converge to the center hole position; A hyperbolic claw slidably disposed in each hyperbolic claw slot; A worm chuck is installed on the spindle support frame, and the worm chuck drives all the hyperbolic jaws to move synchronously and in the same direction to the center hole position to jointly clamp the part to be inspected.

2. The self-locking device for clamping a spindle of a testing instrument to a part according to claim 1, characterized in that: After the hyperbolic claw clamps the part to be inspected, the top of the claw tip will be slightly deformed. The reverse force generated at both ends of the hyperbolic claw curve and the force generated by the micro-deformation of the hyperbolic claw are superimposed to form a self-locking force, thereby maintaining the clamping force on the part to be inspected.

3. A self-locking device for clamping a spindle of a testing instrument to a part according to claim 1 or 2, characterized in that: The hyperbolic claw is made of brass or alloy aluminum.

Images