A zero-position positioning tool clamp capable of realizing quick replacement of a clamp

Abstract

The utility model relates to zero point positioning frock clamp technical field, concretely relates to a kind of zero point positioning frock clamp capable of realizing fixture quick replacement, including locating seat, the top of locating seat movably is provided with fixture body, the bottom of fixture body is provided with locating piece, the inside of locating seat is rotatably provided with two-way screw rod, the outside of two-way screw rod both sides is all screw set with screw block, the top of two screw blocks is all provided with the clamping block for the clamping of locating piece, the inside of locating seat is further provided with the stabilizing assembly for preventing two-way screw rod vibration, the rotational freedom of two-way screw rod is limited by stabilizing assembly itself structure, avoid the vibration caused by machine tool processing to cause two-way screw rod autorotation, ensure the clamping force stability of clamping block to locating piece, prevent frock slackening influence processing accuracy, then through the clamping block of two screw blocks top synchronous movement with screw block, until and locating piece outer wall close adhesion.

Description

Technical Field

[0001] This utility model relates to the field of zero-point positioning tooling fixture technology, specifically to a zero-point positioning tooling fixture that enables quick fixture changes. Background Technology

[0002] During machine tool processing, fixtures are needed to fix and position workpieces to facilitate machining. When machining different workpieces, different fixtures need to be selected and changed according to the machining process of the parts. Currently, most fixtures are fixed to the machine tool by fasteners. When the fixture needs to be replaced, the fasteners need to be disassembled. The existing method of disassembling fixtures is relatively cumbersome. In addition, zero-point positioning is required when fixing the replaced fixture, which prolongs the production waiting time and reduces the operation efficiency.

[0003] Chinese Patent Publication No. CN218592363U discloses a zero-point positioning base for easy clamp replacement, including a fixed base and a clamp assembly. The fixed base has a horizontal mounting hole in its center and a mating hole in its upper surface. A quick-change mechanism is installed in the mounting hole. The clamp assembly is fixedly connected to the upper side of the fixed base via the quick-change mechanism. Both sides of the double-ended screw are threaded with sleeves, and each sleeve has a limit groove on one side. Limit bolts are threaded to both sides of the upper side of the fixed base opposite the mating hole. The bottom ends of the limit bolts abut against the limit grooves on both sides. The two sleeves clamp a connecting member, and the top end of the connecting member is fixedly connected to the lower surface of the clamp assembly. In this invention, the clamp assembly can be easily disassembled by simply rotating the double-ended screw, improving the efficiency of clamp replacement and saving waiting time.

[0004] The aforementioned device allows for quick disassembly and replacement of the fixture using a bidirectional screw. However, vibrations occur during workpiece machining, and the bidirectional screw is prone to rotation under these vibrations, thus failing to effectively clamp the fixture and affecting the machining accuracy of the workpiece. Utility Model Content

[0005] To address the aforementioned issues, a zero-point positioning fixture is provided that enables rapid fixture changes. By stabilizing the structure of the component itself, the rotational freedom of the bidirectional screw is restricted, preventing vibrations generated during machine tool processing from causing the bidirectional screw to rotate. This ensures stable clamping force of the clamping block on the positioning component and prevents the fixture from loosening and affecting machining accuracy.

[0006] To address the problems of existing technologies, this utility model provides a zero-point positioning fixture that enables quick fixture changes. The fixture includes a positioning base, a fixture body movably mounted on the top of the positioning base, a positioning element mounted on the bottom of the fixture body, a bidirectional screw rotatably mounted inside the positioning base, threaded blocks threaded onto both sides of the bidirectional screw, and clamping blocks for holding the positioning element mounted on the top of each of the two threaded blocks. The positioning base also includes a stabilizing component to prevent vibration of the bidirectional screw.

[0007] Preferably, a limit block is provided at the bottom of both threaded blocks, and a limit groove is provided inside the positioning seat for the limit block to move.

[0008] Preferably, the stabilization component includes a drive shaft connected to one end of a bidirectional screw, a gear is provided on the outside of the drive shaft, and two sets of symmetrical spring telescopic rods are provided inside the positioning seat, with toothed blocks for engaging the gears at the telescopic ends of the spring telescopic rods.

[0009] Preferably, a pull rod is movably disposed inside the drive shaft, a connecting block is disposed at one end of the pull rod, an annular block is disposed outside the connecting block, and a moving groove is provided inside the drive shaft for the connecting block to move.

[0010] Preferably, the outer wall of the annular block is movably provided with a mounting plate, and the side wall of the mounting plate is rotatably provided with a pressing block, one end of which is rotatably connected to the side wall of the toothed block.

[0011] Preferably, a roller is provided on the other side wall of the mounting plate, and an annular groove for the roller to move is provided inside the annular block.

[0012] Preferably, the top of the positioning seat is provided with a calibration component, and the bottom of the fixture body is provided with a calibration hole that is compatible with the calibration component.

[0013] Preferably, one end of the pull rod extends to the outside of the positioning seat and is provided with a handle.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. By limiting the rotational freedom of the bidirectional screw through the stabilizing component's own structure, the vibration generated during machine tool processing is prevented from causing the bidirectional screw to rotate, ensuring the stability of the clamping force of the clamping block on the positioning part and preventing the fixture from loosening and affecting the machining accuracy.

[0016] 2. The clamping blocks at the top of the two threaded blocks move synchronously with the threaded blocks until they are tightly fitted with the outer wall of the positioning part. The positioning part is clamped by the clamping force, thereby realizing the installation of the fixture body on the positioning seat and completing the quick assembly of the fixture. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a zero-point positioning tooling fixture that enables quick fixture changes.

[0018] Figure 2 This is a structural diagram of some components in a zero-point positioning tooling fixture that enables quick fixture changes.

[0019] Figure 3 This is a schematic diagram of the internal structure of the positioning seat in a zero-point positioning tooling fixture that enables quick fixture changes.

[0020] Figure 4 yes Figure 3 A magnified structural diagram of point A in the middle.

[0021] Figure 5 This is a structural diagram of a stabilization component in a zero-point positioning tooling fixture that enables quick fixture changes.

[0022] Figure 6 This is a schematic diagram of the roller structure in a zero-point positioning tooling fixture that enables quick fixture changes.

[0023] The following are the labels in the diagram: 1. Positioning seat; 2. Fixture body; 3. Pull rod; 4. Drive shaft; 5. Double-acting screw; 6. Limiting block; 7. Threaded block; 8. Clamping block; 9. Calibration component; 10. Positioning component; 11. Ring block; 12. Spring telescopic rod; 13. Tooth block; 14. Connecting block; 15. Pressing block; 16. Gear; 17. Mounting plate; 18. Roller. Detailed Implementation

[0024] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 6 As shown, this utility model provides:

[0026] A zero-point positioning fixture capable of quick fixture change includes a positioning base 1, a fixture body 2 movably mounted on the top of the positioning base 1, a positioning element 10 mounted on the bottom of the fixture body 2, a bidirectional screw 5 rotatably mounted inside the positioning base 1, threaded blocks 7 threaded on both sides of the bidirectional screw 5, and clamping blocks 8 for clamping the positioning element 10 mounted on the top of each of the two threaded blocks 7. The positioning base 1 also includes a stabilizing component to prevent vibration of the bidirectional screw 5.

[0027] When the clamp body 2 is placed on top of the positioning seat 1, the positioning member 10 at the bottom of the clamp body 2 serves as a positioning reference, realizing the initial alignment of the clamp body 2 and the positioning seat 1, laying the foundation for subsequent clamping and fixing.

[0028] When the bidirectional screw 5 is rotated, since the threads on both sides of the bidirectional screw 5 rotate in opposite directions and the threaded block 7 is threadedly connected to the bidirectional screw 5, the rotation of the bidirectional screw 5 will be converted into the two threaded blocks 7 moving closer or further apart along the axial direction of the bidirectional screw 5.

[0029] The clamping blocks 8 at the top of the two threaded blocks 7 move synchronously with the threaded blocks 7 until they are in close contact with the outer wall of the positioning part 10. The positioning part 10 is clamped by the clamping force, thereby realizing the installation of the fixture body 2 on the positioning seat 1 and completing the quick assembly of the fixture.

[0030] The stabilization component starts working after the fixture is fixed. It restricts the rotational degree of freedom of the bidirectional screw 5 through its own structure, preventing the bidirectional screw 5 from rotating due to vibration generated during machine tool processing. This ensures that the clamping force of the clamping block 8 on the positioning component 10 is stable and prevents the fixture from loosening and affecting the processing accuracy.

[0031] like Figure 2 As shown, the bottom of both threaded blocks 7 is provided with limit blocks 6, and the interior of the positioning seat 1 is provided with a limit groove for the limit blocks 6 to move.

[0032] When the bidirectional screw 5 rotates, causing the threaded block 7 to move, the limiting block 6 at the bottom of the threaded block 7 will embed into the limiting groove inside the positioning seat 1 and slide synchronously along the extension direction of the limiting groove. The limiting groove indirectly constrains the movement direction of the threaded block 7 by limiting the movement trajectory of the limiting block 6, preventing the threaded block 7 from rotating circumferentially with the rotation of the bidirectional screw 5, ensuring that the threaded block 7 only makes stable relative approaching or moving away along the axis of the bidirectional screw 5, and ensuring the accuracy of the clamping action of the clamping block 8 on the positioning part 10.

[0033] like Figure 4 and Figure 5 As shown, the stabilization assembly includes a drive shaft 4 connected to one end of the bidirectional screw 5. A gear 16 is provided on the outside of the drive shaft 4. Two sets of symmetrical spring telescopic rods 12 are provided inside the positioning seat 1. The telescopic ends of the spring telescopic rods 12 are provided with tooth blocks 13 for engaging the gear 16.

[0034] One end of the bidirectional screw 5 is connected to the drive shaft 4, and the gear 16 is fixed to the outside of the drive shaft 4. When the bidirectional screw 5 rotates, it will drive the drive shaft 4 and the gear 16 to rotate synchronously; when the bidirectional screw 5 stops rotating, the clamp has clamped, and the gear 16 also remains stationary.

[0035] When the two sets of spring telescopic rods 12 inside the positioning seat 1 are in a naturally extended state, the toothed blocks 13 at their telescopic ends move toward the gear 16 under the action of the spring force until the toothed blocks 13 and the tooth grooves of the gear 16 mesh with each other.

[0036] After the tooth block 13 meshes with the gear 16, the circumferential rotation of the gear 16 is restricted. Since the gear 16 is connected to the drive shaft 4, the circumferential rotation of the bidirectional screw 5 is also locked, thereby preventing the bidirectional screw 5 from rotating due to processing vibration and ensuring the clamping stability of the fixture.

[0037] like Figure 5 As shown, a pull rod 3 is movably arranged inside the drive shaft 4, a connecting block 14 is provided at one end of the pull rod 3, an annular block 11 is provided outside the connecting block 14, and a moving groove is provided inside the drive shaft 4 for the connecting block 14 to move.

[0038] When it is necessary to rotate the bidirectional screw 5 to loosen the clamp, pull the lever 3 outward from the positioning seat 1. One end of the lever 3 extends to the positioning seat 1, and the lever 3 moves axially inside the drive shaft 4.

[0039] The connecting block 14 at one end of the pull rod 3 moves synchronously with the pull rod 3. Since the connecting block 14 is embedded in the moving groove inside the drive shaft 4, the moving groove provides a stable motion guide for the connecting block 14 and prevents the connecting block 14 from shifting. At the same time, the annular block 11 outside the connecting block 14 moves axially along the drive shaft 4 together with the connecting block 14, transmitting the linear motion of the pull rod 3 to the subsequent unlocking components.

[0040] like Figure 5 As shown, an installation disk 17 is movably provided on the outer wall of the annular block 11, and an extrusion block 15 is rotatably provided on the side wall of the installation disk 17. One end of the extrusion block 15 is rotatably connected to the side wall of the toothed block 13.

[0041] When the annular block 11 moves along the drive shaft 4, it will drive the mounting plate 17, which is movably connected to it, to move synchronously.

[0042] The pressing block 15, which is rotatably connected to the side wall of the mounting plate 17, moves with the mounting plate 17. Since the other end of the pressing block 15 is rotatably connected to the side wall of the tooth block 13, it generates a thrust on the tooth block 13 that is away from the direction of the gear 16.

[0043] The pushing force of the pressing block 15 overcomes the spring force of the spring telescopic rod 12, causing the tooth block 13 to move away from the gear 16 until the tooth block 13 is completely separated from the gear 16, releasing the lock on the gear 16. At this time, the bidirectional screw 5 can rotate freely to loosen the clamp for replacement. When the pull rod 3 is released, the spring force of the spring telescopic rod 12 pushes the tooth block 13 to reset and re-engage with the gear 16 for locking.

[0044] like Figure 6As shown, a roller 18 is provided on the other side wall of the mounting plate 17, and an annular groove for the roller 18 to move is provided inside the annular block 11.

[0045] The roller 18 on the other side wall of the mounting plate 17 is embedded in the annular groove inside the annular block 11. When the annular block 11 moves axially along the drive shaft 4, the roller 18 can roll in the annular groove, reducing the frictional resistance between the mounting plate 17 and the annular block 11, making the movement of the mounting plate 17 smoother. At the same time, the circumferential limiting effect of the annular groove on the roller 18 can prevent the mounting plate 17 from rotating or shifting circumferentially relative to the annular block 11, ensuring the stability of the thrust direction of the extrusion block 15 on the toothed block 13, and ensuring the accuracy of the meshing or disengaging action of the toothed block 13 and the gear 16.

[0046] like Figure 3 As shown, the top of the positioning seat 1 is provided with a calibration component 9, and the bottom of the fixture body 2 is provided with a calibration hole that is compatible with the calibration component 9.

[0047] When the fixture body 2 is placed on top of the positioning seat 1, the calibration piece 9 on the top of the positioning seat 1 must be precisely aligned with and inserted into the calibration hole on the bottom of the fixture body 2. The matching structure between the calibration piece 9 and the calibration hole can further limit the lateral displacement of the fixture body 2 before the positioning piece 10 is clamped, ensuring that the installation position of the fixture body 2 is completely consistent with the "zero point" reference of the machine tool, avoiding machining errors caused by fixture installation offset, and reducing the time for subsequent zero-point recalibration of the fixture, thus improving work efficiency.

[0048] like Figure 4 As shown, one end of the pull rod 3 extends to the outside of the positioning seat 1 and is provided with a handle.

[0049] When it is necessary to pull lever 3 to release the locking of the stabilizing component, the operator can apply force by holding the handle. The handle increases the contact area between the hand and lever 3, reducing the difficulty of applying force and making the pulling action of lever 3 easier.

[0050] The above embodiments merely illustrate one or several implementation methods of the zero-point positioning tooling fixture capable of rapid fixture change according to this utility model. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

[0051] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A zero-point positioning tooling fixture capable of rapid fixture change, characterized in that, The device includes a positioning seat (1), a clamp body (2) is movably disposed on the top of the positioning seat (1), a positioning element (10) is disposed on the bottom of the clamp body (2), a bidirectional screw (5) is rotatably disposed inside the positioning seat (1), threaded blocks (7) are threaded on both sides of the bidirectional screw (5), and clamping blocks (8) for clamping the positioning element (10) are disposed on the top of the two threaded blocks (7). A stabilizing component to prevent the bidirectional screw (5) from vibrating is also disposed inside the positioning seat (1).

2. The zero-point positioning fixture capable of quick fixture change according to claim 1, characterized in that, Both of the threaded blocks (7) are provided with limit blocks (6) at their bottoms, and the positioning seat (1) has a limit groove inside for the limit blocks (6) to move.

3. A zero-point positioning fixture capable of rapid fixture change according to claim 1, characterized in that, The stabilization component includes a drive shaft (4) connected to one end of a bidirectional screw (5). A gear (16) is provided on the outside of the drive shaft (4). Two sets of symmetrical spring telescopic rods (12) are provided inside the positioning seat (1). The telescopic end of the spring telescopic rod (12) is provided with a tooth block (13) for engaging the gear (16).

4. A zero-point positioning fixture capable of rapid fixture change according to claim 3, characterized in that, A pull rod (3) is movably arranged inside the drive shaft (4). A connecting block (14) is provided at one end of the pull rod (3). An annular block (11) is provided outside the connecting block (14). A moving groove for the connecting block (14) to move is opened inside the drive shaft (4).

5. A zero-point positioning fixture capable of rapid fixture change according to claim 4, characterized in that, The outer wall of the annular block (11) is movably provided with a mounting plate (17), and the side wall of the mounting plate (17) is rotatably provided with a pressing block (15), one end of the pressing block (15) being rotatably connected to the side wall of the toothed block (13).

6. A zero-point positioning fixture capable of rapid fixture change according to claim 5, characterized in that, The other side wall of the mounting plate (17) is provided with a roller (18), and the interior of the annular block (11) is provided with an annular groove for the roller (18) to move.

7. A zero-point positioning fixture capable of rapid fixture change according to claim 1, characterized in that, The top of the positioning seat (1) is provided with a calibration component (9), and the bottom of the fixture body (2) is provided with a calibration hole that is compatible with the calibration component (9).

8. A zero-point positioning fixture capable of rapid fixture change according to claim 4, characterized in that, One end of the pull rod (3) extends to the outside of the positioning seat (1) and is provided with a rotating handle.

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