Self-locking workpiece positioning adjusting device

Abstract

According to the technical scheme, the self-locking workpiece positioning adjusting device is characterized by comprising a main matching seat installed in a chuck or a spring clamp, a step part is arranged in the main matching seat, a connecting hole and a spring cavity are formed in the step part, threads are arranged in the connecting hole, and the connecting hole is in threaded connection with a limiting adjusting rod; the limiting adjusting rod is sleeved with a limiting piece fixed to the limiting adjusting rod in the circumferential direction, one end of the limiting piece abuts against the step part, the other end of the limiting piece abuts against a compressed spring sleeve clamped to the main matching base, a spring and a steel ball are arranged in the spring cavity, a notch is formed in the end, abutting against the step part, of the limiting piece, and the spring drives the steel ball to abut against the notch in a matched mode. According to the utility model, parts can be conveniently and axially positioned, meanwhile, the self-locking function is realized, automatic locking is realized after length adjustment is completed, and the operation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control lathe processing technical field, more specifically, it relates to a self locking workpiece positioning adjusting device. BACKGROUND

[0002] At present, many numerical control lathes on the market do not have axial positioning devices for three-jaw chucks or spring chucks, so that the turning of the parts with end face positioning to ensure the length cannot be processed. Based on this, the prior art discloses a kind of axial positioning device of numerical control lathe steam three-jaw chuck with patent application number CN201220394002.X, the device includes the steam three-jaw chuck of numerical control lathe, positioning seat is installed on the steam three-jaw chuck of numerical control lathe, threaded hole is arranged on the positioning seat, positioning screw that can be axially adjusted is installed in threaded hole, positioning platform for positioning parts is arranged at one end of positioning screw, locking nut capable of locking positioning screw is arranged at the other end of positioning screw. When using, the positioning screw can be adjusted, and the function of axial positioning is played.

[0003] The prior art also discloses a kind of spring chuck device with axial positioning function with patent application number CN200920044969.3, positioning sleeve is arranged in spring chuck, spring is arranged between positioning sleeve and spring chuck, and positioning sleeve and spring chuck are movably connected;The middle section of the outer surface of positioning sleeve is provided with external thread, and the inner surface of spring chuck is provided with matching internal thread, and locking screw is arranged at the threaded connection of the two, so it can adjust the length by thread, and lock by locking screw after adjustment.

[0004] But in actual use, it is found that the above two ways are troublesome when adjusting, and it is necessary to loosen locking nut / locking screw every time, then adjust the length, and then tighten locking nut / locking screw after adjustment, and if there is an error in length adjustment, the above steps need to be repeated to correct, which greatly reduces work efficiency. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of self locking workpiece positioning adjusting device, which can conveniently position the parts in axial direction, and has self locking function, automatically locks after length adjustment, and is more convenient to operate.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of self-locking workpiece positioning adjusting device, including main seat installed in chuck or spring clamp, the inside of main seat is provided with step part, connecting hole and spring cavity are equipped on the step part, the connecting hole has thread and is threadedly connected with limiting adjusting rod, limiting adjusting rod is equipped with limiting sheet with limiting adjusting rod circumferential fixed, one end of limiting sheet is arranged with step part, the other end is arranged with spring sleeve with the spring sleeve being clamped on main seat, spring and steel ball are arranged in spring cavity, the end of limiting sheet being abutted with step part is provided with notch, spring drive steel ball is matched with notch.

[0007] The utility model further sets up: limiting adjusting rod is set to hollow structure, and inside thread is cooperated with turning adjusting rod, one end of turning adjusting rod is flat end face, and the other end is extended and is provided with telescopic rod of diameter reduction.

[0008] The utility model further sets up: limiting adjusting rod is provided with top screw hole, and turning adjusting rod is fixed by screwing top screw in top screw hole.

[0009] The utility model further sets up: flat end face is provided with groove for driving turning adjusting rod rotation, and one end of turning adjusting rod is provided with plane for driving turning adjusting rod rotation.

[0010] The utility model further sets up: telescopic rod is equipped with stroke groove and prop open spring, stroke groove is used to control telescopic rod telescopic stroke, and prop open spring is used to push out telescopic rod outward.

[0011] The utility model further sets up: limiting adjusting rod is provided with clamping groove along axial direction, limiting sheet is provided with clamping pin in radial direction, and clamping pin cooperates with clamping groove to realize the circumferential fixation of limiting sheet on limiting adjusting rod.

[0012] The utility model further sets up: spring cavity is provided with three, three spring cavities are symmetrically arranged on the side of connecting hole, and six notches are correspondingly provided.

[0013] The utility model further sets up: still include nut, and nut is threadedly connected with limiting adjusting rod.

[0014] The utility model further sets up: second top screw hole is provided on the side wall of nut, and second top screw hole and top screw hole are matched.

[0015] Summarized above, the utility model has following beneficial effects:

[0016] Compared with the prior art, the step portion is arranged in the main adjusting seat, the spring cavity is arranged in the step portion, the circumferentially fixed limiting piece is further arranged on the limiting adjusting rod, the notch on the limiting piece is matched with the spring and the steel ball in the spring cavity, when the limiting adjusting rod is rotated by a certain angle, the limiting piece is synchronously rotated and is automatically fixed through the cooperation of the steel ball and the notch, the extending length of the limiting adjusting rod can be kept unchanged under the condition of not being subjected to the rotating external force.

[0017] Meanwhile, the limiting adjusting rod with the hollow structure is further arranged, the rotating adjusting rod is arranged in the limiting adjusting rod, under the normal condition, the flat end face of the rotating adjusting rod faces outward and positions the workpiece, when the particularly small workpiece is positioned, the smaller telescopic rod faces outward and positions the small workpiece, and it is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic view of the device cooperating with the spring clamp to position the workpiece.

[0019] Figure 2 It is the structural schematic view of the flat end face abutting against the workpiece.

[0020] Figure 3 It is the structural schematic view of the telescopic rod of the rotating adjusting rod abutting against the workpiece.

[0021] Figure 4 It is the structural schematic view of the nut abutting against the workpiece.

[0022] Figure 5 It is the internal structure cross section schematic view.

[0023] Figure 6 It is the whole explosion structural schematic view.

[0024] Figure 7 It is the structural schematic view of the other side of the limiting piece.

[0025] Reference numerals: 1. Main support; 1a. Stepped section; 101. Connecting hole; 102. Spring cavity; 1021. Spring; 1022. Steel ball; 2. Limit adjustment rod; 3. Limiting piece; 301. Groove; 4. Compression spring sleeve; 5. Adjustment rod; 5a. Groove type; 5b. Plane; 501. Flat end face; 502. Telescopic rod; 5021. Stroke groove; 5022. Spreading spring; 6. Slot; 7. Locking pin; 8. Nut; 9. Set screw hole; 10. Second set screw hole; 11. Spring clip; 12. Workpiece. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] This embodiment discloses a self-locking workpiece positioning and adjustment device, such as... Figure 1 As shown, it includes a main mounting base 1 installed in a chuck or spring clip. Figure 1 The diagram illustrates the installation of this device within the spring clip 11. The device can be fixed to the spring clip 11 using a threaded fastening method. The limiting adjustment rod 2 extends into the clip and abuts against the end of the workpiece 12, providing axial positioning for the workpiece 12. Further... Figures 2-7 As shown, the main support 1 of this embodiment has a stepped portion 1a inside. The stepped portion 1a has a connecting hole 101 and a spring cavity 102. The connecting hole 101 has a thread and a limit adjustment rod 2 is threadedly connected to it. A limit piece 3 is sleeved on the limit adjustment rod 2 and is circumferentially fixed to the limit adjustment rod 2. One end of the limit piece 3 abuts against the stepped portion 1a, and the other end abuts against a compression spring sleeve 4 that is snapped onto the main support 1. A spring 1021 and a steel ball 1022 are provided in the spring cavity 102. The end of the limit piece 3 that abuts against the stepped portion 1a has a groove 301. The spring 1021 drives the steel ball 1022 to abut against the groove 301. With the above structure, a limiting plate 3, circumferentially fixed on the limiting adjustment rod 2, is used in conjunction with a spring 1021 and a steel ball 1022 for fixation. When the length of the limiting adjustment rod 2 is adjusted by rotating it via the thread, the limiting plate 3 rotates synchronously, and the slot 301 on the limiting plate 3 abuts against the steel ball 1022, thus fixing the limiting adjustment rod 2. In use, the operator uses a wrench or pliers to forcefully rotate the limiting adjustment rod 2, overcoming the locking of the steel ball and the slot to adjust the distance. After adjustment, the steel ball is allowed to re-lock with the slot, forming a self-locking mechanism. Without external rotational force, the limiting adjustment rod 2 remains stable (when axially positioning the workpiece, it is basically only subjected to axial force, without external rotational force). Compared to the existing method of using a locking nut for fixation, this method is more convenient for adjustment and greatly improves work efficiency.

[0028] Furthermore, the limit adjustment rod 2 is a hollow structure with an internal threaded adjustment rod 5. One end of the adjustment rod 5 is a flat end face 501, and the other end extends to form a telescopic rod 502 with a reduced diameter. Based on the above structure, referring to... Figures 1-2 The adjustment rod 5 is designed to adapt to workpieces with particularly small diameters. When dealing with workpieces with small diameters, the telescopic rod 502 is used to abut against the workpiece. Firstly, the diameter of the telescopic rod 502 is also small, making it easier to align. Secondly, the telescopic rod 502 has telescopic elasticity. Small workpieces are generally subjected to fine processing and have high length requirements. The telescopic adjustment can adjust the length more flexibly, resulting in more accurate positioning and a more secure clamping by the three-jaw chuck.

[0029] Furthermore, the limit adjustment rod 2 is provided with a set screw hole 9, and the adjustment rod 5 is fixed by screwing a set screw into the set screw hole 9. The set screw is not shown in the figure, and the set screw hole 9 ensures the stability of the adjustment rod 5.

[0030] Furthermore, the flat end face 501 is provided with a groove 5a for driving the rotation of the adjustment lever 5, and one extended end of the adjustment lever 5 is provided with a flat surface 5b for driving the rotation of the adjustment lever. Both the groove 5a and the flat surface 5b are designed to facilitate the operator to rotate the adjustment lever 5. Figure 1 In the middle, slot 5a is flat-headed; a flat-head screwdriver can be used to rotate the adjusting lever 5. Figure 2 In the middle, plane 5b has two symmetrical surfaces, so the adjustment rod 5 can be rotated by clamping the two planes 5b with a wrench. The above structure makes it easier for operators to assemble and disassemble the adjustment rod 5.

[0031] Furthermore, refer to Figure 2 and Figure 4 The telescopic rod 502 is provided with a stroke groove 5021 and a spreading spring 5022. A pin is fitted in the stroke groove 5021 to control the extension stroke of the telescopic rod 502. The spreading spring 5022 is used to push the telescopic rod 502 outward.

[0032] Furthermore, refer to Figures 4-5 In order to achieve circumferential fixation of the limiting adjustment rod 2 and the limiting piece 3, the limiting adjustment rod 2 is provided with a groove 6 in the axial direction, and the limiting piece 3 is provided with a pin 7 in the radial direction. The pin 7 cooperates with the groove 6 to achieve circumferential fixation of the limiting piece 3 on the limiting adjustment rod 2.

[0033] Furthermore, refer to Figures 5-6Three spring cavities 102 are provided, symmetrically arranged around the periphery of the connecting hole 101, and six slots 301 are correspondingly provided. The three spring cavities 102 ensure that the force exerted by the spring and steel ball on the limiting plate 3 is relatively balanced, preventing tilting, while providing appropriate resistance. This ensures both self-locking and that the limiting adjustment rod 2 can be rotated by the operator when force is applied. The six slots 301 allow the limiting plate 3 to be fixed after each small rotation.

[0034] Furthermore, it also includes a nut 8, which is threadedly connected to the limit adjusting rod 2. The nut can be as follows: Figures 1-2 It is screwed onto the rear end of the limit adjusting rod 2 to prevent the limit adjusting rod 2 from coming off. Alternatively, it can be... Figure 3 A second set screw hole 10 is provided on the side wall of the nut 8. The second set screw hole 10 is compatible with the set screw hole 9. The nut is set at the front end. When dealing with workpieces with larger diameters, the nut is used for abutment, which improves the versatility of the positioning device for workpieces of various sizes.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking workpiece positioning and adjusting device, comprising a main support (1) installed in a chuck or spring clamp, characterized in that: The main support (1) has a stepped part (1a) inside. The stepped part (1a) has a connecting hole (101) and a spring cavity (102). The connecting hole (101) has a thread and a limit adjustment rod (2) is threadedly connected. A limit piece (3) is sleeved on the limit adjustment rod (2) and is circumferentially fixed to the limit adjustment rod (2). One end of the limit piece (3) abuts against the stepped part (1a) and the other end abuts against a compression spring sleeve (4) that is snapped onto the main support (1). The spring cavity (102) has a spring (1021) and a steel ball (1022). The end of the limit piece (3) that abuts against the stepped part (1a) has a groove (301). The spring (1021) drives the steel ball (1022) to abut against the groove (301).

2. The self-locking workpiece positioning and adjusting device according to claim 1, characterized in that: The limiting adjustment rod (2) is set as a hollow structure and has an internal threaded adjustment rod (5). One end of the adjustment rod (5) is a flat end face (501), and the other end extends to be provided with a telescopic rod (502) with a reduced diameter.

3. The self-locking workpiece positioning and adjusting device according to claim 2, characterized in that: The limit adjustment rod (2) is provided with a set screw hole (9), and the adjustment rod (5) is fixed by screwing a set screw into the set screw hole (9).

4. The self-locking workpiece positioning and adjusting device according to claim 2, characterized in that: The flat end face (501) is provided with a groove (5a) for driving the swivel rod (5) to rotate, and the extended end of the swivel rod (5) is provided with a plane (5b) for driving the swivel rod to rotate.

5. The self-locking workpiece positioning and adjusting device according to claim 2, characterized in that: The telescopic rod (502) is provided with a travel groove (5021) and a spreading spring (5022). The travel groove (5021) is used to control the extension and retraction travel of the telescopic rod (502), and the spreading spring (5022) is used to push the telescopic rod (502) outward.

6. The self-locking workpiece positioning and adjusting device according to claim 1, characterized in that: The limiting adjustment rod (2) is provided with a groove (6) in the axial direction, and the limiting piece (3) is provided with a pin (7) in the radial direction. The pin (7) cooperates with the groove (6) to achieve circumferential fixation of the limiting piece (3) on the limiting adjustment rod (2).

7. The self-locking workpiece positioning and adjusting device according to claim 1, characterized in that: The spring cavity (102) is provided in three ways, and the three spring cavities (102) are centrally symmetrically arranged on the periphery of the connecting hole (101). The slot (301) is provided in six ways.

8. The self-locking workpiece positioning and adjusting device according to claim 1, characterized in that: It also includes a nut (8), which is threadedly connected to the limit adjustment rod (2).

9. A self-locking workpiece positioning and adjusting device according to claim 8, characterized in that: The nut (8) has a second set screw hole (10) on its side wall, and the second set screw hole (10) and the set screw hole (9) are compatible.

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