Positioning fixture for machining

Abstract

The utility model provides a positioning fixture for machining, which relates to the technical field of positioning fixtures and comprises a bottom plate, a sliding groove is arranged on the top surface of the bottom plate, a guide block is mounted on the top surface of the bottom plate, a screw rod is rotatably connected in the bottom plate, a moving block is slidably connected in the guide block, and a positioning block is mounted in the moving block. A clamping plate is installed on the top face of the moving block, a dustproof assembly is arranged in the bottom plate, when the device is idle for a long time, the moving block is moved to the center of the bottom plate, then a nut is taken down, a dustproof plate can automatically shield a sliding groove, and dust is prevented from falling into the bottom plate from the sliding groove; dust is prevented from accumulating on the surface of the lead screw, the dustproof effect is improved, and storage and placement of the device are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to positioning fixture technical field especially relates to a positioning fixture for machining. BACKGROUND

[0002] A fixture is a device or tool used to secure, clamp, and support workpieces during manufacturing, machining, and assembly processes. It serves to fix the position of workpieces, provide accuracy in machining, and ensure stability. Fixtures are typically composed of a fixture base, clamping jaws, and fixture blocks, designed and manufactured according to the shape and size of the workpiece to ensure stability, accuracy, and safety during the machining process.

[0003] Chinese patent publication number CN220903035U discloses a mechanical machining positioning fixture, which includes a supporting bottom plate with a slide rail at the top end, a moving block connected to the surface of the slide rail, a first fixed plate connected to the top end of the moving block, a detachable fixed plate, a push plate, a second fixed plate with a threaded hole on the surface, a first threaded rod connected to one end of the detachable fixed plate, and a second threaded rod connected to both ends of the detachable fixed plate with a nut threaded onto the surface of the second threaded rod.

[0004] In this existing design, the first threaded rod can be rotated to move the detachable fixed plate and push plate forward and backward, allowing the workpiece or machine to be fixed at the appropriate position. By rotating the nut on the surface of the second threaded rod, the detachable fixed plate can be adjusted or replaced. After adjustment, the dust on the fixture can be cleaned, and the wear degree of the fixture can be checked to replace it in time, making the data of the machine more stable during use. However, when the device is idle for a long time, dust may fall into the supporting bottom plate, which may accumulate on the surface of the threaded rod and inside the supporting bottom plate, affecting the normal use of the device.

[0005] Therefore, a positioning fixture for machining is designed to solve the above problems. SUMMARY

[0006] To solve the problems mentioned in the background technology, the utility model provides a positioning fixture for machining, which has the characteristics of improving dust prevention effect, avoiding dust falling into the bottom plate, and reducing the impact on device use.

[0007] The utility model discloses a positioning fixture for machining has adopted following technical scheme: a positioning fixture for machining, including bottom plate, the top surface of bottom plate is opened with the sliding slot, the top surface of bottom plate is installed with the guide block, the inside rotation of bottom plate is connected with the lead screw, the inside sliding connection of guide block has the moving block, the top surface of moving block is installed with the clamping plate, the inside of bottom plate is provided with dustproof assembly, dustproof assembly includes fixed block and dustproof board, the inner wall of bottom plate is installed with fixed block, the inside of fixed block is installed with slide rod, the surface of slide rod is slidably connected with dustproof board, the surface of slide rod is equipped with the spring, the top surface of dustproof board is installed with sliding block, the inside of sliding block is inserted with the plug rod, and the both ends of plug rod are threadedly connected with the nut.

[0008] As a positioning fixture for machining of the utility model, the inside of the moving block is provided with a thread, and the thread is engaged with the lead screw.

[0009] As a positioning fixture for machining of the utility model, one end of the lead screw is rotatably connected with the inner wall of the bottom plate, and the other end of the lead screw is provided with a hand wheel.

[0010] As a positioning fixture for machining of the utility model, the moving block is slidably connected with the inside of the sliding slot.

[0011] As a positioning fixture for machining of the utility model, the number of dustproof boards is two groups, and the two groups of dustproof boards are symmetrically installed on the two sides of the sliding slot.

[0012] As a positioning fixture for machining of the utility model, the number of springs is two groups, and the two groups of springs are respectively sleeved on the two ends of the slide rod.

[0013] As a positioning fixture for machining of the utility model, one end of the two groups of springs is fixedly connected with the inner wall of the fixed block, and the other end of the two groups of springs is fixedly connected with the side surface of the dustproof board.

[0014] As a positioning fixture for machining of the utility model, the surface of the dustproof board is provided with a groove, and the shape and size of the groove and the moving block are matched.

[0015] As a positioning fixture for machining of the utility model, the side surface of the sliding block is provided with a special-shaped block.

[0016] Compared with the prior art, the dustproof assembly is arranged, when the device is idle for a long time, the moving block is moved to the center of the bottom plate, the nut is removed, the dustproof plate can automatically shield the sliding groove, dust falling into the inside of the bottom plate from the sliding groove is avoided, dust accumulated on the surface of the lead screw is avoided, the dustproof effect is improved, and the storage and placement device is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A schematic view of the positioning clamp for machining is provided for the utility model;

[0018] Figure 2 A partial sectional view of the positioning clamp for machining is provided for the utility model;

[0019] Figure 3 A top view of the positioning clamp for machining is provided for the utility model;

[0020] Figure 4 A schematic view of the dustproof assembly of the positioning clamp for machining is provided for the utility model;

[0021] Figure 5 A positioning clamp for machining is provided for the utility model Figure 4 An enlarged view of A in the middle.

[0022] LEGEND:

[0023] 1, bottom plate; 2, guide block; 3, lead screw; 4, moving block; 5, clamping plate;

[0024] 6, dustproof assembly; 601, fixed block; 602, dustproof plate; 603, sliding rod; 604, spring; 605, sliding block; 606, insertion rod; 607, nut; 608, groove; 609, special-shaped block;

[0025] 7, sliding groove; 8, hand wheel. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described below in combination with the drawings and embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific embodiments disclosed in the following specification.

[0028] Embodiment 1

[0029] In the prior art, the existing mechanical processing positioning clamp comprises a bottom plate 1, the top end of the bottom plate 1 is provided with a sliding rail, the surface of the sliding rail is slidably connected with a moving block, the top end of the moving block is fixedly connected with a first fixed plate, a detachable fixed plate, a push plate, a second fixed plate, the surface of the second fixed plate is provided with a threaded hole, one end of the detachable fixed plate is rotatably connected with a first threaded rod, both ends of the detachable fixed plate are fixedly connected with second threaded rods, and the surface of the second threaded rods is threadedly connected with nuts.

[0030] The present application combines the above-mentioned prior art, as shown in Figures 1 to 5 The utility model provides a positioning fixture for mechanical processing, the top surface of bottom plate 1 is provided with a sliding groove 7, the top surface of bottom plate 1 is installed with a guide block 2, the inside of bottom plate 1 is rotatably connected with a lead screw 3, the inside of guide block 2 is slidably connected with a moving block 4, the top surface of moving block 4 is installed with a clamping plate 5, the inside of bottom plate 1 is provided with a dustproof assembly 6, the dustproof assembly 6 includes a fixed block 601 and a dustproof plate 602, the fixed block 601 is installed on the inner wall of bottom plate 1, the inside of fixed block 601 is installed with a sliding rod 603, the dustproof plate 602 is slidably connected to the surface of sliding rod 603, the surface of sliding rod 603 is sleeved with a spring 604, the top surface of dustproof plate 602 is installed with a sliding block 605, the inside of sliding block 605 is inserted with a plug rod 606, and both ends of plug rod 606 are threadedly connected with nuts 607.

[0031] In the embodiment, when the device is placed for a long time, first rotate the lead screw 3, move the moving block 4 to the center of the bottom plate 1 by the lead screw 3, then remove the plug rod 606 from the sliding block 605 by rotating the nut 607, at this time, under the reaction force of the spring 604, the spring 604 drives the dustproof plate 602 to slide on the surface of the sliding rod 603, and the dustproof plate 602 gradually shields the sliding groove 7, until the spring 604 is completely reset, at this time, the dustproof plate 602 can prevent dust from falling into the bottom plate 1 through the sliding groove 7.

[0032] In combination with the above scheme,

[0033] Further,

[0034] As shown in Figure 2 ;

[0035] In order to facilitate clamping workpiece, in an optional embodiment, the interior of the moving block 4 is provided with a screw thread, and the screw thread is engaged with the lead screw 3.

[0036] In this embodiment, when the lead screw 3 rotates, the lead screw 3 drives the moving block 4 to move, and the moving block 4 drives the clamping plate 5 to move simultaneously, so as to conveniently adjust the spacing of the clamping plate 5, position and clamp workpieces of different sizes, and improve the use flexibility of the device.

[0037] In combination with the above scheme,

[0038] Further,

[0039] As shown in Figure 2 ;

[0040] In order to facilitate the rotation of the lead screw 3, in an optional embodiment, one end of the lead screw 3 is rotatably connected to the inner wall of the bottom plate 1, and the other end of the lead screw 3 is provided with a hand wheel 8, which is located outside the bottom plate 1.

[0041] In this embodiment, one end of the lead screw 3 is rotatably connected to the inner wall of the bottom plate 1, so as to limit the lead screw 3 and limit the rotation of the lead screw 3, avoid displacement of the lead screw 3, rotate the hand wheel 8 outside the bottom plate 1, drive the lead screw 3 to rotate, and drive the moving block 4 to move by rotating the lead screw 3 in place.

[0042] In combination with the above scheme,

[0043] Further,

[0044] As shown in Figures 1 to 3 ;

[0045] In order to limit the moving direction of the moving block 4, in an optional embodiment, the moving block 4 is slidably connected to the interior of the sliding groove 7.

[0046] In this embodiment, when the lead screw 3 rotates, the lead screw 3 drives the moving block 4 to move, and the moving block 4 slides in the sliding groove 7, so as to limit the moving direction of the moving block 4 and avoid the moving block 4 from being skewed during movement, which affects the positioning and clamping effect of the clamping plate 5 on the workpiece.

[0047] In combination with the above scheme,

[0048] Further,

[0049] As shown in Figures 4 to 5 ;

[0050] In order to completely shield the sliding groove 7, in an optional embodiment, the number of dustproof plates 602 is two groups, and the two groups of dustproof plates 602 are symmetrically installed on both sides of the sliding groove 7.

[0051] In the embodiment, two groups of dustproof plates 602 are arranged, and the size of each group of dustproof plates 602 is half of the size of the sliding groove 7, so that the two groups of dustproof plates 602 can completely cover the sliding groove 7, and dust falling from the sliding groove 7 into the bottom plate 1 is avoided. Meanwhile, the two groups of dustproof plates 602 are symmetrically arranged on the two sides of the sliding groove 7, so that the sliding of the moving block 4 is not affected.

[0052] In combination with the above scheme,

[0053] Furthermore,

[0054] As shown in Figures 4 to 5 ;

[0055] In order to connect the dustproof plate 602 and the fixed block 601, in an optional embodiment, the number of springs 604 is two groups, and the two groups of springs 604 are respectively sleeved on the two ends of the sliding rod 603.

[0056] In the embodiment, the dustproof plate 602 is connected with the fixed block 601 through the spring 604, and the sliding rod 603 can improve the stability of the dustproof plate 602 during movement, so that the dustproof plate 602 can be automatically reset after the spring 604 is released from the limiting position, thereby covering the sliding groove 7.

[0057] In combination with the above scheme,

[0058] Furthermore,

[0059] As shown in Figures 4 to 5 ;

[0060] In order to make the dustproof plate 602 automatically reset, in an optional embodiment, one end of the two groups of springs 604 is fixedly connected with the inner wall of the fixed block 601, and the other end of the two groups of springs 604 is fixedly connected with the side surface of the dustproof plate 602.

[0061] In the embodiment, when the plug rod 606 is separated from the surface of the sliding block 605, the sliding block 605 is released from the fixed limiting position, and under the action of the spring force of the spring 604, the dustproof plate 602 can be driven to slide on the surface of the sliding rod 603 synchronously, so that the dustproof plate 602 can automatically cover the sliding groove 7.

[0062] In combination with the above scheme,

[0063] Furthermore,

[0064] As shown in Figures 2 to 4 ;

[0065] In order to avoid affecting the moving block 4, in an optional embodiment, a groove 608 is arranged on the surface of the dustproof plate 602, and the size of the groove 608 is matched with the size of the moving block 4.

[0066] In the embodiment, when the dustproof plate 602 shields the sliding groove 7, the moving block 4 is just clamped into the groove 608, which can facilitate the placement of the dustproof plate 602 and also limit the moving block 4, so as to avoid the displacement of the moving block 4 caused by the accidental touch of the hand wheel 8, and affect the dustproof effect.

[0067] In combination with the above scheme,

[0068] Further,

[0069] As Figures 4 to 5 shown;

[0070] In order to facilitate the removal of the nut 607, in an optional embodiment, the side surface of the sliding block 605 is provided with a special-shaped block 609.

[0071] In the embodiment, when the sliding block 605 needs to be limited, the special-shaped block 609 is pressed to facilitate the removal of the nut 607 from both ends of the insertion rod 606, thereby improving the convenience.

[0072] Working principle: when the device is idle, first rotate the hand wheel 8, the hand wheel 8 drives the screw rod 3 to rotate, because the moving block 4 is internally provided with a thread engaged with the screw rod 3, so the screw rod 3 drives the moving block 4 to move, at the same time, the moving block 4 drives the clamping plate 5 to move, until the moving block 4 moves to the center of the bottom plate 1, at this time, the special-shaped block 609 is pinched, the special-shaped block 609 drives the sliding block 605 to extrude the spring 604 again, at this time, the nut 607 is conveniently rotated, the nut 607 is rotated and the insertion rod 606 is removed from the inside of the sliding block 605, at this time, the hand pinching the special-shaped block 609 is released, the spring 604 loses extrusion of external force, because of its own elastic force, so it drives the dustproof plate 602 to move, the dustproof plate 602 slides on the surface of the sliding rod 603, until the spring 604 restores, at this time, the dustproof plate 602 can shield the sliding groove 7, to avoid dust falling into the inside of the bottom plate 1 through the sliding groove 7 when the device is idle.

[0073] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still falls within the protection scope of the present application.

Claims

1. A positioning fixture for machining, comprising a base plate (1), characterized in that: The top surface of the base plate (1) is provided with a sliding groove (7), and a guide block (2) is installed on the top surface of the base plate (1). A lead screw (3) is rotatably connected inside the base plate (1). A moving block (4) is slidably connected inside the guide block (2). A clamping plate (5) is installed on the top surface of the moving block (4). A dustproof component (6) is provided inside the base plate (1). The dustproof component (6) includes a fixing block (601) and a dustproof plate (602). The fixing block (601) The fixed block (601) is installed on the inner wall of the base plate (1). A slide rod (603) is installed inside the fixed block (601). The dustproof plate (602) is slidably connected to the surface of the slide rod (603). A spring (604) is sleeved on the surface of the slide rod (603). A slider (605) is installed on the top surface of the dustproof plate (602). A plug rod (606) is inserted inside the slider (605). Nuts (607) are threaded to both ends of the plug rod (606).

2. The positioning fixture for machining according to claim 1, characterized in that: The moving block (4) has a thread inside, and the thread meshes with the lead screw (3).

3. The positioning fixture for machining according to claim 2, characterized in that: One end of the lead screw (3) is rotatably connected to the inner wall of the base plate (1), and the other end of the lead screw (3) is equipped with a handwheel (8), which is located outside the base plate (1).

4. The positioning fixture for machining according to claim 3, characterized in that: The movable block (4) is slidably connected to the inside of the groove (7).

5. The positioning fixture for machining according to claim 4, characterized in that: There are two sets of dustproof plates (602), and the two sets of dustproof plates (602) are symmetrically installed on both sides of the slide groove (7).

6. The positioning fixture for machining according to claim 5, characterized in that: There are two sets of springs (604), and the two sets of springs (604) are respectively sleeved on both ends of the slide rod (603).

7. The positioning fixture for machining according to claim 6, characterized in that: One end of each of the two sets of springs (604) is fixedly connected to the inner wall of the fixing block (601), and the other end of each of the two sets of springs (604) is fixedly connected to the side of the dustproof plate (602).

8. The positioning fixture for machining according to claim 7, characterized in that: The surface of the dustproof plate (602) is provided with a groove (608), and the shape and size of the groove (608) and the moving block (4) are matched.

9. The positioning fixture for machining according to claim 8, characterized in that: A shaped block (609) is mounted on the side of the slider (605).

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