A self-locking jig

Abstract

This utility model provides a self-locking fixture, including a base with a mounting cavity matching the workpiece body. The base has a first transverse through-groove, within which a slide rod slides. One end of the slide rod is connected to a connecting plate, and the connecting plate has a transversely arranged positioning pin. The base also has a positioning hole matching the positioning pin and communicating with the mounting cavity. Above the base is a slide seat with a second transverse through-groove. A guide rod slides within the second groove, with one end connected to a push block and the other end connected to a pressure block via a connecting rod. An elastic element is provided between the push block and the slide seat. This self-locking fixture can lock and unlock the workpiece body and its retractable parts, ensuring processing accuracy. Furthermore, the pressure block is in a locked state under spring action in its natural state, ensuring stable self-locking of the retractable parts. This self-locking fixture is convenient, quick, and has excellent performance.

Description

Technical Field

[0001] This utility model relates to the field of jig technology, and in particular to a self-locking jig. Background Technology

[0002] Fixtures are widely used tools in machining, electrical control, automotive, and other fields, primarily serving as tools for fixing and positioning workpieces. Generally, existing fixtures directly press the workpiece against their designated surface to hold it in place.

[0003] However, for automotive parts with carbon brushes, there is an elastic element behind the carbon brush, making it retractable relative to the workpiece body. Current fixtures can only hold the workpiece body, while the carbon brush is in a pop-out state. During the machining of the carbon brush, it is easy for it to retract under force, resulting in errors and directly affecting the machining quality. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a self-locking fixture to solve the problem that the fixtures in the prior art cannot fix the retractable parts on the workpiece.

[0005] To achieve the above and other related objectives, this utility model provides a self-locking fixture, including a base, on which an installation cavity matching the workpiece body is provided, and a first transverse sliding groove is provided at one end of the base, in which a sliding rod is slidably disposed, one end of the sliding rod being connected to a connecting plate, and a horizontally arranged positioning pin being provided on the connecting plate, and a positioning hole matching the positioning pin and communicating with the installation cavity is also provided on the base;

[0006] A slide is provided above the base, and a second sliding groove is opened in the slide. A guide rod is slidably arranged in the second sliding groove. One end of the guide rod is connected to the push block, and the other end of the guide rod is connected to the pressure block through a connecting rod. An elastic element is provided between the push block and the slide.

[0007] In one embodiment of this utility model, the elastic element is a spring, which surrounds the guide rod, with one end of the spring in contact with the slide block and the other end of the spring in contact with the push block.

[0008] In one embodiment of the present invention, the slide block is provided with two parallel second slide grooves, and a guide rod is slidably disposed in each of the two second slide grooves.

[0009] In one embodiment of the present invention, the connecting rod is L-shaped, and the pressure block is connected to the top of the connecting rod.

[0010] In one embodiment of the present invention, a cylinder is provided on the outward side of the pushing block for pushing the pushing block to move toward the slide.

[0011] In one embodiment of this utility model, the workpiece body is provided with a plurality of holes, and the positioning pin can be inserted into the holes to position and lock the workpiece body.

[0012] In one embodiment of this utility model, the connecting plate is provided with at least two positioning pins.

[0013] In one embodiment of this utility model, the other end of the slide rod is connected to a cylinder, which can drive the slide rod to move laterally left and right, thereby causing the positioning pin to extend into or disengage from the hole in the workpiece body.

[0014] In one embodiment of the present invention, a limiting groove is provided below the first sliding groove, and a limiting block that cooperates with the limiting groove is connected below the sliding rod.

[0015] As described above, the self-locking fixture of this utility model has the following beneficial effects: The self-locking fixture of this utility model has a slidingly adjustable positioning pin and a pressure block, which can lock and unlock the workpiece body and its retractable parts respectively, ensuring that the retractable parts are in a locked state during processing and ensuring processing accuracy; in addition, the pressure block is in a locked state under the action of a spring in its natural state, ensuring the stable self-locking of the retractable parts. The self-locking of the pressure block is controlled by a cylinder alone, and can be unlocked or locked as needed during processing, which is convenient, quick, and has excellent performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the self-locking fixture in the locked workpiece state disclosed in the embodiments of this utility model.

[0017] Figure 2 This is a schematic diagram of the self-locking fixture in the unlocked workpiece state disclosed in the embodiments of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure in which the self-locking fixture and the workpiece are separated, as disclosed in the embodiments of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the self-locking fixture disclosed in the embodiments of this utility model. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the structure of the self-locking fixture disclosed in the embodiments of this utility model. Figure 2 .

[0021] Component designation explanation

[0022] 100. Base; 110. Mounting cavity; 120. First slide groove; 130. Limiting groove; 140. Positioning hole; 200. Slide rod; 210. Connecting plate; 220. Positioning pin; 230. Limiting block; 300. Slide seat; 310. Second slide groove; 400. Guide rod; 410. Pushing block; 420. Spring; 430. Connecting rod; 440. Pressure block; 500. Workpiece; 510. Workpiece body; 520. Telescopic part. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] Please see Figures 1-5 This utility model provides a self-locking fixture for locking a workpiece 500, which includes a workpiece body 510 and a retractable portion 520 above it. Therefore, this self-locking fixture is needed to lock the workpiece body 510 and the retractable portion 520.

[0025] This self-locking fixture includes a base 100, on which a mounting cavity 110 matching the workpiece body 510 is formed. One end of the base 100 has a first transverse sliding groove 120, in which a sliding rod 200 is slidably disposed. One end of the sliding rod 200 is connected to a connecting plate 210. The connecting plate 210 has two transversely arranged positioning pins 220. The base 100 also has positioning holes 140 that match the positioning pins 220 and connect to the mounting cavity 110. The workpiece body 510 has multiple holes, and the two positioning pins 220 can be inserted into the holes of the workpiece body 510 to position and self-lock the workpiece body 510. Meanwhile, a slide block 300 is provided above the base 100. Two transversely penetrating second slide grooves 310 are formed in the slide block 300. Guide rods 400 are slidably arranged in the second slide grooves 310 respectively. One end of the guide rod 400 is connected to the push block 410, and the other end of the guide rod 400 is connected to the pressure block 440 through the connecting rod 430. An elastic element is provided between the push block 410 and the slide block 300. The sliding of the guide rod 400 along the second slide groove 310 can drive the pressure block 440 to move laterally, so that the pressure block 440 can self-lock and press the retractable part 520 above the workpiece body 510, preventing the retractable part 520 from popping out and affecting subsequent processing.

[0026] Furthermore, a cylinder is provided on the outward side of the push block 410 to push the push block 410 to move toward the slide block 300, thereby causing the pressure block 440 at the other end of the guide rod 400 to release the workpiece 500 outward.

[0027] Furthermore, the other end of the slide rod 200 is also connected to a cylinder, which can drive the slide to move left and right, thereby causing the positioning pin 220 to extend into or disengage from the hole of the workpiece body 510, so as to realize the self-locking or unlocking of the workpiece body 510.

[0028] Furthermore, refer to Figure 5 A limiting groove 130 is provided below the first sliding groove 120, and a limiting block 230 that cooperates with the limiting groove 130 is connected below the sliding rod 200. The cooperation of the limiting groove 130 and the limiting block 230 can restrict the sliding path of the sliding rod 200, so that the positioning pin 220 can switch between locked and unlocked states.

[0029] Furthermore, the elastic element is a spring 420, which surrounds the guide rod 400. One end of the spring 420 contacts the slide block 300, and the other end contacts the push block 410. When the cylinder extends and acts on the push block 410, it moves the push block 410 toward the slide block 300, causing the pressure block 440 to move outward and release the retractable portion 520. When the cylinder retracts, the push block 410 returns to its original position under the action of the spring 420, causing the pressure block 440 to return to its initial position and press the retractable portion 520 of the workpiece 500.

[0030] Furthermore, the connecting rod 430 is L-shaped, and the pressure block 440 is connected to the top of the connecting rod 430.

[0031] Operating Instructions: In use, first, the cylinder extends and simultaneously presses inward the pushing block 410 and the slide rod 200, so that the pressure block 440 and the positioning pin 220 are in the unlocked state. At this time, the workpiece 500 is placed into the mounting cavity 110 of the base 100. Then, the cylinder retracts, causing the slide rod 200 to move laterally back to its original position, so that the positioning pin 220 on the connecting plate 210 is inserted into the hole of the workpiece body 510, thereby achieving positioning and locking of the workpiece body 510. At the same time, after the pushing block 410 is no longer pressed by the cylinder, it moves laterally outward under the action of the spring 420 to return to its original position, so that the pressure block 440 presses the retractable part 520 on the workpiece body 510 downward to prevent it from popping upward.

[0032] In summary, the self-locking fixture of this invention features a slidingly adjustable positioning pin and a pressure block, which can lock and unlock the workpiece body and its retractable parts respectively, ensuring that the retractable parts are locked during processing and guaranteeing processing accuracy. Furthermore, the pressure block is in a locked state in its natural state, ensuring stable self-locking of the retractable components. The self-locking of the pressure block is controlled independently by a cylinder, allowing for unlocking or locking as needed during processing, which is convenient, quick, and provides excellent results. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0033] The terms used in this specification, such as "upper", "lower", "left", "right", "front", "back", "middle" and "one", are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0034] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A self-locking jig, characterized by, The device includes a base, on which an installation cavity matching the workpiece body is provided. A first horizontal through groove is provided at one end of the base. A slide rod is slidably provided in the first groove. One end of the slide rod is connected to a connecting plate. A positioning pin is provided on the connecting plate. A positioning hole matching the positioning pin and communicating with the installation cavity is also provided on the base. A slide is provided above the base, and a second sliding groove is opened in the slide. A guide rod is slidably arranged in the second sliding groove. One end of the guide rod is connected to the push block, and the other end of the guide rod is connected to the pressure block through a connecting rod. An elastic element is provided between the push block and the slide.

2. The self-locking fixture according to claim 1, characterized in that, The elastic element is a spring, which surrounds the guide rod. One end of the spring contacts the slide block, and the other end of the spring contacts the push block.

3. The self-locking fixture of claim 1, wherein, The slide block is provided with two parallel second slide grooves, and a guide rod is slidably installed in each of the two second slide grooves.

4. The self-locking fixture of claim 1, wherein, The connecting rod is L-shaped, and the pressure block is connected to the top of the connecting rod.

5. The self-locking fixture of claim 1, wherein, A cylinder is provided on the outward-facing side of the push block, which is used to push the push block to move in the direction of the slide block.

6. The self-locking fixture according to any one of claims 1 to 5, wherein The workpiece body has several holes, and the positioning pin can be inserted into the holes to position and lock the workpiece body.

7. The self-locking fixture of claim 6, wherein, The connecting plate is provided with at least two positioning pins.

8. The self-locking fixture of claim 6, wherein, The other end of the slide rod is connected to a cylinder, which can drive the slide rod to move laterally left and right, thereby causing the positioning pin to extend into or detach from the hole in the workpiece body.

9. The self-locking fixture according to claim 1, characterized in that, A limiting groove is provided below the first slide groove, and a limiting block that cooperates with the limiting groove is connected below the slide rod.

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