Centering clamping mechanism

Abstract

The utility model relates to a centering clamping mechanism which comprises a base, the base is fixedly connected with a machining center, a driving block is arranged on the base in a sliding mode, a plurality of connecting rods are arranged on the driving block, one end of each connecting rod in the length direction is fixedly connected with the driving block, and the other end of each connecting rod in the length direction is fixedly connected with the machining center. A fixing block is arranged at the end, away from the driving block, of each connecting rod, one end of each fixing block is rotationally and slidably connected with the corresponding connecting rod, a connecting block is further fixed to the base, and the connecting block is rotationally connected with each fixing block; each connecting rod is in sliding fit with the corresponding fixing block in the direction close to the corresponding connecting block along the corresponding connecting rod, and a positioning block used for clamping a workpiece to be machined is fixed to the side, away from the corresponding connecting rod, of each fixing block. The positioning device has the effects of quickly positioning the to-be-machined workpiece and improving the working efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of machining center fixtures, and in particular to a centering clamping mechanism. Background Art

[0002] A fixture is a device used to fix the workpiece in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. It can be used to quickly, conveniently and safely install the workpiece in any process of the process. When machining a workpiece on a machining center, the surface of the workpiece must meet the technical requirements of size, geometry and relative position accuracy with other surfaces specified in the drawing.

[0003] When processing workpieces with square inner holes, a four-jaw chuck is generally used to position the workpiece. However, when processing parts in batches, the relative position between each workpiece and the four-jaw chuck is inconsistent, resulting in inconsistent processing reference surfaces for each workpiece. Workers are required to fine-tune or re-calibrate each workpiece, resulting in low processing efficiency and inconsistent workpiece accuracy. Summary of the invention

[0004] In order to enable workers to quickly position the workpiece to be processed and improve work efficiency, the present application provides a centering clamping mechanism.

[0005] The centering clamping mechanism provided in this application adopts the following technical solution:

[0006] The cam is an axially coupled machine which is adapted to move the drive members together so as to allow the drive members to move relative to each other, and a plurality of coupling members are coupled to the cam, wherein the coupling members are arranged on the cam and the cam faces a circle which is arranged adjacent to the coupling members.

[0007] By adopting the above technical solution, the staff puts the workpiece to be processed on the fixed block, and the driving block drives the multiple connecting rods to slide to the side away from the base, and the multiple connecting rods respectively drive the corresponding fixed blocks to rotate, and the multiple positioning blocks move in directions away from each other, and the side of each positioning block away from each other is pressed against the surface of the inner hole of the workpiece. Since the connecting block is fixed to the base, the relative rotation angle between the multiple fixed blocks and the base is the same, so the displacement of each positioning block is the same. When the centering clamping mechanism clamps the workpiece, the distance between each positioning block and the side wall of the inner hole of the corresponding workpiece is consistent. In this way, the mechanism can make the positioning reference surface position of the workpiece to be processed installed on the mechanism the same, and can accurately and quickly realize the synchronous reference centering and clamping positioning of the workpiece to be processed, thereby helping to improve production efficiency.

[0008] Preferably, each of the connecting rods is rotatably provided with a positioning pin, and each of the positioning pins and the fixed block are slidingly matched with the corresponding fixed block along the direction of the corresponding connecting rod approaching the connecting block, the axial direction of each positioning pin is perpendicular to the length direction of the connecting rod, and the axial direction of each positioning pin is perpendicular to the sliding direction of the connecting rod and the fixed block.

[0009] By adopting the above technical solution, when the driving block drives the connecting rod to slide in a direction close to the fixed block, the connecting rod is rotationally and slidingly connected with the fixed block through the positioning pin.

[0010] Preferably, each fixing block is provided with a waist-shaped groove, which penetrates the fixing block along the axis direction of the positioning pin, and the positioning pin is inserted into the waist-shaped groove, and the positioning pin slides in the waist-shaped groove along the length direction of the waist-shaped groove.

[0011] By adopting the above technical solution, the positioning pin slides in the waist-shaped groove along the length direction of the waist-shaped groove, and at the same time, the positioning pin is rotationally connected to the connecting rod, thereby realizing the rotational sliding connection between the fixed block and the connecting rod.

[0012] Preferably, each of the fixed blocks is provided with a rotating shaft, each of the rotating shaft is located on the side of the corresponding fixed block away from the corresponding connecting rod, each of the rotating shaft is rotatably connected to the corresponding connecting block, the axial direction of each of the rotating shaft is perpendicular to the length direction of the corresponding connecting rod, and the axial direction of each of the rotating shaft is perpendicular to the sliding direction of the corresponding connecting rod and the corresponding fixed block.

[0013] By adopting the above technical solution, each rotating shaft is rotatably connected to the corresponding fixed block and the connecting block respectively, so that the corresponding fixed block and the connecting block can rotate relative to each other.

[0014] Preferably, the connecting block includes a mounting block and a rotating block, the mounting block is fixedly connected to the base, the rotating block is located on the side of the mounting block away from the base, a plurality of rotating blocks are arranged on the mounting block corresponding to each fixed block, each rotating block is rotatably connected to the corresponding fixed block, and each of the fixed blocks is located on the side of the mounting block away from the base.

[0015] By adopting the above technical solution, when each rotating rod drives the corresponding fixed block to rotate around the rotating axis, the side of the fixed block close to the mounting block approaches the mounting block. By controlling the size structure of the mounting block, it helps to limit the rotation stroke of each fixed block. In this way, it helps to reduce the rotation stroke of each fixed block, making it convenient for workers to quickly disassemble and install workpieces.

[0016] Preferably, a limiting block is fixed on the connecting block, and the limiting block is located between all the fixed blocks.

[0017] By adopting the above technical solution, when each rotating rod drives the corresponding fixed block to rotate around the rotating axis, the side of the fixed block close to the limit block approaches the limit block. By controlling the size structure of the limit block, it helps to reduce the rotation stroke of each fixed block, making it convenient for workers to quickly disassemble and assemble workpieces. At the same time, this method helps to reduce the possibility of collision between adjacent fixed blocks, thereby helping to extend the service life of the fixed blocks.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. The staff puts the workpiece to be processed on the fixed block, and drives the driving block to move, so that the side of the positioning block on each fixed block that is away from each other is pressed against the inner hole surface of the workpiece, so as to realize the rapid centering and clamping of the workpiece to be processed;

[0020] 2. By changing the size and structure of the mounting block, it helps to reduce the rotation stroke of each fixed block, making it easier for workers to quickly disassemble and assemble workpieces;

[0021] 3. By changing the size structure of the limit block, it helps to reduce the possibility of collision between adjacent fixed blocks, thereby helping to extend the service life of the centering clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an axonometric schematic diagram of a centering clamping mechanism disclosed in an embodiment of the present application;

[0023] Figure 2 is a cross-sectional view of a centering clamping mechanism disclosed in an embodiment of the present application;

[0024] Figure 3 It is an exploded schematic diagram of a centering clamping mechanism disclosed in an embodiment of the present application.

[0025] Figure numerals: 1. base; 2. driving block; 3. connecting rod; 4. fixing block; 41. positioning block; 42. waist-shaped groove; 43. sliding groove; 44. rotating groove; 5. connecting block; 51. mounting block; 52. rotating block; 53. limiting block; 6. positioning pin; 7. rotating shaft. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-3 This application is described in further detail.

[0027] The embodiment of the present application discloses a centering clamping mechanism.

[0028] See also Figure 1-3 The centering clamping mechanism includes a base 1, on which a driving block 2 is arranged, and the driving block 2 is slidably matched with the base 1 in the vertical direction. Two connecting rods 3 are respectively arranged on both sides of the length direction of the driving block 2. One end of any connecting rod 3 in the length direction is fixed to the driving block 2 by bolts.

[0029] A fixed block 4 is provided at one end of the connecting rod 3 away from the driving block 2. The two fixed blocks 4 on the two connecting rods 3 are symmetrically arranged. A sliding groove 43 is provided on one side of the length direction of any fixed block 4, and the side of the sliding groove 43 close to the connecting rod 3 is called an open setting, and the connecting rod 3 is inserted into the sliding groove 43. A waist-shaped groove 42 is also provided on the fixed block 4, and the waist-shaped groove 42 penetrates the fixed block 4 along the width direction of the fixed block 4. The length direction of the waist-shaped groove 42 is set at a certain angle with the length direction of the fixed block 4, and the waist-shaped grooves 42 on the two fixed blocks 4 are symmetrically arranged. A positioning pin 6 is provided in any waist-shaped groove 42, and the axial direction of any positioning pin 6 is parallel to the width direction of the corresponding fixed block 4, and any positioning pin 6 penetrates the corresponding connecting rod 3 along its axial direction. The two ends of any positioning pin 6 slide with the corresponding waist-shaped groove 42 along the length direction of the waist-shaped groove 42. When the driving block 2 drives the connecting rod 3 to move, the connecting rod 3 drives one end of the fixing block 4 to move along the length direction of the connecting rod 3 through the positioning pin 6, and the fixing block 4 rotates around the axis direction of the positioning pin 6. The waist-shaped groove 42 arranged at a certain angle helps to reduce the phenomenon of self-locking when the connecting rod 3 and the fixing block 4 form a 90-degree angle with the connecting rod 3 when the connecting rod 3 and the fixing block 4 rotate relative to each other.

[0030] See also Figure 2-Figure 3, a rotating groove 44 is also provided on the fixed block 4, and the rotating groove 44 is located on the side where the two fixed blocks 4 are close to each other, and the side of the rotating groove 44 close to the base 1 is open. A connecting block 5 is provided between the fixed block 4 and the base 1, and the connecting block 5 includes a mounting block 51, and the mounting block 51 is fixedly connected to the base 1 by bolts. A rotating block 52 is also formed on the side of the mounting block 51 away from the base 1, and two rotating blocks 52 are arranged on the mounting block 51 at intervals along the length direction of the fixed block 4. The two rotating blocks 52 correspond to the two fixed blocks 4 respectively. When the two fixed blocks 4 rotate a certain angle, the lower sides of the two fixed blocks 4 will respectively abut against the mounting block 51. By adjusting the size and shape of the mounting block 51, the staff can help control the stroke of the fixed block 4 and improve the efficiency of the staff in disassembling and assembling the workpiece.

[0031] Any rotating block 52 is inserted into the rotating groove 44 of the corresponding fixed block 4. A limit block 53 is also arranged between the two rotating blocks 52, and the limit block 53 is formed on the mounting block 51. A rotating shaft 7 is arranged on any fixed block 4, and the axial direction of any rotating shaft 7 is parallel to the width direction of the fixed block 4, and any rotating shaft 7 passes through the corresponding fixed block 4 and the rotating block 52 along its axial direction. The fixed block 4 and the rotating block 52 are connected by the rotating shaft 7. When the staff disassembles the workpiece installed on the centering clamping mechanism, the staff pushes the driving block 2 to move upward, and the driving block 2 drives the two connecting rods 3 to move upward. The two connecting rods 3 push the ends of the fixed block 4 away from the connecting block 5 to move upward respectively, and the sides of the two fixed blocks 4 close to the connecting block 5 respectively rotate downward around the axial direction of the corresponding rotating shaft 7. When the two fixed blocks 4 rotate a certain angle, the sides of the two fixed blocks 4 close to each other will abut against the limit block 53. This method helps to reduce the possibility of collision between the two fixed blocks 4 and helps to extend the service life of the fixed block 4.

[0032] A positioning block 41 is also provided on the side of any fixed block 4 facing away from the base 1, and the two positioning blocks 41 are respectively located on the sides of the two fixed blocks 4 that are close to each other. The staff puts the workpiece to be processed on the fixed block 4, and drives the fixed block 4 to rotate by adjusting the position of the driving block 2, so that the sides of the two positioning blocks 41 that are facing away from each other are respectively pressed against the side walls of the inner hole of the workpiece to be processed. In this way, the workpiece to be processed can be quickly centered and clamped.

[0033] The implementation principle of a centering clamping mechanism in an embodiment of the present application is as follows: when it is necessary to fix the workpiece to be processed, the staff fixes the base 1 on the workbench of the machining center and places the workpiece to be processed on the fixed block 4. The staff pulls the drive block 2 to move downward, and the drive block 2 drives the two connecting rods 3 to move downward, and the two positioning pins 6 slide in directions away from each other, and the two positioning pins 6 drive the two fixed blocks 4 to rotate downward around the axis of the rotating shaft 7. The two positioning blocks 41 rotate around the axis of the rotating shaft 7 to the side away from each other, and the sides of the two positioning blocks 41 away from each other are respectively abutted against the two opposite sides of the inner hole of the workpiece to be processed. In this way, the staff can quickly center and clamp the workpiece to be processed, which helps to improve the work efficiency of the staff and ensure the consistency of the precision of batch processed workpieces.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A centering clamping mechanism, characterized in that: The invention comprises a base (1), a driving block (2) being slidably arranged on the base (1), a plurality of connecting rods (3) being arranged on the driving block (2), one end of each connecting rod (3) being fixedly connected to the driving block (2) in the length direction, a fixing block (4) being arranged at the end of each connecting rod (3) facing away from the driving block (2), one end of each fixing block (4) being rotatably and slidably connected to the corresponding connecting rod (3), the linear direction of the rotation axis (7) of each fixing block (4) and the corresponding connecting rod (3) being perpendicular to the length direction of the connecting rod (3), and a connecting block (5) being fixed on the base (1). The connecting block (5) is rotatably connected to each fixed block (4); each connecting rod (3) is slidably matched with the corresponding fixed block (4) along the direction of the corresponding connecting rod (3) approaching the connecting block (5); the rotation axis (7) line between each connecting rod (3) and the corresponding fixed block (4) is perpendicular to the sliding direction; the rotation axis (7) line between the connecting block (5) and each fixed block (4) is parallel to the rotation axis (7) line between the fixed block (4) and the corresponding connecting rod (3); and a positioning block (41) for clamping a workpiece to be processed is fixed on a side of the fixed block (4) away from the connecting rod (3).

2. A centering clamping mechanism according to claim 1, characterized in that: A positioning pin (6) is rotatably provided on each of the connecting rods (3); each of the positioning pins (6) and the fixing block (4) are slidably matched with the corresponding fixing block (4) along the direction of the corresponding connecting rod (3) approaching the connecting block (5); the axial direction of each of the positioning pins (6) is perpendicular to the length direction of the connecting rod (3); and the axial direction of each of the positioning pins (6) is perpendicular to the sliding direction of the connecting rod (3) and the fixing block (4).

3. A centering clamping mechanism according to claim 2, characterized in that: Each fixing block (4) is provided with a waist-shaped groove (42), the waist-shaped groove (42) penetrates the fixing block (4) along the axis direction of the positioning pin (6), the positioning pin (6) is inserted into the waist-shaped groove (42), and the positioning pin (6) slides in the waist-shaped groove (42) along the length direction of the waist-shaped groove (42).

4. A centering clamping mechanism according to claim 3, characterized in that: Each of the fixed blocks (4) is provided with a rotating shaft (7), each of the rotating shafts (7) is located on a side of the corresponding fixed block (4) away from the corresponding connecting rod (3), each of the rotating shafts (7) is rotatably connected to the corresponding connecting block (5), the axial direction of each of the rotating shafts (7) is perpendicular to the length direction of the corresponding connecting rod (3), and the axial direction of each of the rotating shafts (7) is perpendicular to the sliding direction of the corresponding connecting rod (3) and the corresponding fixed block (4).

5. A centering clamping mechanism according to claim 1, characterized in that: The connecting block (5) comprises a mounting block (51) and a rotating block (52); the mounting block (51) is fixedly connected to the base (1); the rotating block (52) is located on a side of the mounting block (51) away from the base (1); a plurality of rotating blocks (52) are provided on the mounting block (51) corresponding to each fixed block (4); each rotating block (52) is rotatably connected to a corresponding fixed block (4); and each fixed block (4) is located on a side of the mounting block (51) away from the base (1).

6. A centering clamping mechanism according to claim 1, characterized in that: A limiting block (53) is fixed on the connecting block (5), and the limiting block (53) is located between all the fixed blocks (4).

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