A clamping fixture with variable length of four sides

Abstract

The present invention provides a four-side variable length clamping fixture, comprising a base plate and a first support block, a second support block, and a cylinder support block sequentially arranged on the base plate; a middle and lower rotating support block connected to the base plate is provided between the first support block and the second support block, and a middle and upper rotating support block is connected to the middle and lower rotating support block; the middle and upper rotating support block and the middle and lower rotating support block are respectively connected to the first rotating support block and the second rotating support block via a second guide rod, and the first rotating support block and the second rotating support block are symmetrically arranged at both ends of the second guide rod. The present invention can use a set of clamps to clamp rectangles of different side lengths, and is self-centering clamping, positioning and clamping based on the center of the part, so that the shape error of the part can be evenly distributed to both sides, so that the welds on both sides can be well welded, achieving the effects of convenient part clamping, convenient side length adjustment, strong versatility, reduced product production cost, and high work efficiency.

Description

Technical Field

[0001] The invention relates to a clamping fixture with variable lengths of four sides, in particular to a clamping fixture with variable lengths of four sides for use in rectangles or squares. Background Art

[0002] The laser encapsulation of relay components requires a self-centering fixture. Currently, our factory uses a fixture that relies on two-sided positioning. This causes part shape errors to accumulate in the other two directions, resulting in the weld seams on the other two sides deviating too far during laser welding, making it impossible to achieve a perfect weld and substandard sealing. Using a four-jaw self-centering chuck would be impossible due to the varying dimensions of the parts, especially rectangular ones of varying sizes. Dedicating each part to a dedicated fixture would increase production costs and make fixture replacement a hassle. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a four-side variable length clamping fixture, which utilizes the change in the angle between the pushing direction of the cylinder push rod and the X-axis to change the relative position of the clamping block of the fixture, thereby achieving a self-centering clamping process for rectangles or squares with different side lengths.

[0004] The present invention is achieved through the following technical solutions.

[0005] The cam is connected to the second support bracket of the second support member and the second support bracket of the second support member respectively have a first end fixedly mounted on the support bracket of the second support member and a second end fixedly mounted on the support member.

[0006] The first support block, the second support block and the cylinder support block are all fixed to the base plate by screws and pins, and the second clamping seat is connected to the connecting rod by a pin shaft.

[0007] The middle and lower rotating support blocks are rotatably connected to the bottom plate via a rotating pin, and the middle and upper rotating support blocks are rotatably connected to the middle and lower rotating support blocks via a rotating pin.

[0008] The cylinder seat is connected to the cylinder rotating shaft through a shaft clamp, a shaft sleeve and an angular contact ball bearing.

[0009] The first rotation support block and the second rotation support block are respectively slidably connected to the second guide rod.

[0010] The fourth clamping seat and the second clamping seat can slide along the second guide rod along with the second rotating support block, and the first clamping seat and the third clamping seat can slide along the second guide rod along with the first rotating support block; the upper end surfaces of the first clamping seat, the second clamping seat, the third clamping seat and the fourth clamping seat are all provided with clamping blocks.

[0011] The fourth clamping seat is adjacent to the third clamping seat, and the first clamping seat is adjacent to the second clamping seat.

[0012] The two first guide rods form a group, and the first clamping seat, the second clamping seat, the third clamping seat and the fourth clamping seat are respectively connected through a group of first guide rods.

[0013] The second clamping seat is fixed with two first guide rods in the X direction and the Y direction respectively, the first clamping seat is connected to the second clamping seat through the two first guide rods in the X direction of the second clamping seat and slides along the first guide rods, and the third clamping seat is connected through the two first guide rods in the Y direction of the second clamping seat and slides along the first guide rods; the fourth clamping seat is fixed with two first guide rods in the X direction and the Y direction respectively, the first clamping seat is connected to the fourth clamping seat through the two first guide rods in the X direction of the fourth clamping seat and slides along the first guide rods, and the third clamping seat is connected through the two first guide rods in the Y direction of the fourth clamping seat and slides along the first guide rods.

[0014] The two first guide rods fixed on the second clamping seat in the Y direction pass through the two straight holes on the second support block and are slidably connected to a stop block. A limiting groove is provided on the second support block, and the stop block can only move in conjunction with the second support block; the two first guide rods on the second clamping seat in the X direction pass through the two straight holes on the first support block and are slidably connected to the stop block. A limiting groove is provided on the first support block, and the stop block can only move in conjunction with the second support block.

[0015] The beneficial effects of the present invention are that a set of clamps can be used to clamp rectangles with different side lengths, and the clamping is self-centering, positioning and clamping is performed based on the center of the part, so that the shape error of the part can be evenly distributed to both sides, so that the welds on both sides can be well welded, achieving the effects of convenient part clamping, convenient side length adjustment, strong versatility, reduced product production costs, and high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 is a top view of the present invention;

[0018] In the figure: 1-first guide rod, 2-stop block, 3-first support block, 4-first clamping seat, 5-clamping block, 6-second clamping seat, 7-second support block, 8-cylinder, 9-shaft clamp, 10-sleeve, 11-angular contact ball bearing, 12-cylinder seat, 13-cylinder rotating shaft, 14-base plate, 15-first rotating support block, 16-second rotating support block, 17-middle upper rotating support block, 18-middle lower rotating support block, 19-third clamping seat, 20-fourth clamping seat, 21-second guide rod, 22-connecting rod, 23-connecting rod fixing block, 24-cylinder support block. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0020] Example 1

[0021] like Figure 1 and Figure 2 The four-side variable length clamp shown in the figure includes a base plate 14 and a first support block 3, a second support block 7, and a cylinder support block 24 arranged on the base plate 14 in sequence; a middle and lower rotating support block 18 connected to the base plate 14 is provided between the first support block 3 and the second support block 7, and a middle and upper rotating support block 17 is connected to the middle and lower rotating support block 18; the middle and upper rotating support block 17 and the middle and lower rotating support block 18 are respectively connected to the first rotating support block 15 and the second rotating support block 16 through the second guide rod 21, and the first rotating support block 15 and the second rotating support block 16 are respectively connected to the first rotating support block 15 and the second rotating support block 16. Symmetrically arranged at both ends of the second guide rod 21; the second rotating support blocks 16 at both ends are respectively connected to the fourth clamping seat 20 and the second clamping seat 6, and the first rotating support blocks 15 at both ends are respectively connected to the third clamping seat 19 and the first clamping seat 4, and the first clamping seat 4, the second clamping seat 6, the third clamping seat 19, and the fourth clamping seat 20 are connected by multiple first guide rods 1; the cylinder support block 24 is connected to the cylinder 8 and the cylinder rotating shaft 13 through the cylinder seat 12, and the ejection shaft of the cylinder 8 is connected to the connecting rod 22 through the connecting rod fixing block 23, and the connecting rod 22 is connected to the second clamping seat 6.

[0022] The first support block 3, the second support block 7, and the cylinder support block 24 are all fixed to the base plate 14 by screws and pins, and the second clamping seat 6 is connected to the connecting rod 22 by a pin shaft.

[0023] The middle and lower rotation support block 18 is rotationally connected to the bottom plate 14 via a rotation pin, and the middle and upper rotation support block 17 is rotationally connected to the middle and lower rotation support block 18 via a rotation pin.

[0024] The cylinder seat 12 is connected to the cylinder rotating shaft 13 through a shaft clamp 9, a shaft sleeve 10 and an angular contact ball bearing 11.

[0025] The first rotation support block 15 and the second rotation support block 16 are respectively slidably connected to the second guide rod 21 .

[0026] The fourth clamping seat 20 and the second clamping seat 6 can slide along the second guide rod 21 along with the second rotation support block 16 , and the first clamping seat 4 and the third clamping seat 19 can slide along the second guide rod 21 along with the first rotation support block 15 .

[0027] The fourth clamping seat 20 is adjacent to the third clamping seat 19 , and the first clamping seat 4 is adjacent to the second clamping seat 6 .

[0028] Two first guide rods 1 form a group, and the first clamping seat 4, the second clamping seat 6, the third clamping seat 19, and the fourth clamping seat 20 are respectively connected by a group of first guide rods 1; the upper end surfaces of the first clamping seat 4, the second clamping seat 6, the third clamping seat 19, and the fourth clamping seat 20 are all provided with clamping blocks 5.

[0029] The second clamping seat 6 fixes two first guide rods 1 in the X direction and the Y direction respectively, the first clamping seat 4 is connected to the second clamping seat 6 through the two first guide rods 1 in the X direction of the second clamping seat 6 and slides along the first guide rod 1, and the third clamping seat 19 is connected through the two first guide rods 1 in the Y direction of the second clamping seat 6 and slides along the first guide rod 1; the fourth clamping seat 20 fixes two first guide rods 1 in the X direction and the Y direction respectively, the first clamping seat 4 is connected to the fourth clamping seat 20 through the two first guide rods 1 in the X direction of the fourth clamping seat 20 and slides along the first guide rod 1, and the third clamping seat 19 is connected through the two first guide rods 1 in the Y direction of the fourth clamping seat 20 and slides along the first guide rod 1.

[0030] The two first guide rods 1 fixed in the Y direction of the second clamping seat 6 pass through the two straight holes on the second support block 7 and are slidably connected to the stop block 2. A limiting groove is provided on the second support block 7, and the stop block 2 can only move in conjunction with the second support block 7; the two first guide rods 1 in the X direction of the second clamping seat 6 pass through the two straight holes on the first support block 3 and are slidably connected to the stop block 2. A limiting groove is provided on the first support block 3, and the stop block 2 can only move in conjunction with the second support block 7.

[0031] Example 2

[0032] Adopt the scheme of embodiment 1, and:

[0033] The following components are connected by screws, pins and guide rails, and the cylinder 8 provides power to clamp the parts.

[0034] The four-side variable length clamping fixture of the present invention is constructed and assembled based on the base plate 14 .

[0035] Specifically, the first support block 3, the second support block 7 and the cylinder support block 24 are fixed to the base plate 8 by screws and pins, and the middle and lower rotary support 18 is connected to the base plate 14 by a rotary pin and can rotate; the middle and upper rotary support block 17 is also connected to the middle and lower rotary support block 18 by a rotary pin and rotates.

[0036] Specifically, the first rotation support block 15 and the second rotation support block 16 are connected to the upper middle rotation support block 17 and the lower middle rotation support block 18 respectively through the second guide rod 21 , and can slide on the second guide rod 21 .

[0037] Specifically, the fourth clamping seat 20 and the second clamping seat 6 are connected to the second rotating support block 6 (the second rotating support block 16 has two pieces, respectively located at both ends of the second guide rod 21) through a pin shaft and can slide along the second guide rod 21 with the second rotating support block 16; the first clamping seat 4 and the third clamping seat 19 are also connected to the first rotating support block 15 through a pin shaft, and can slide along the second guide rod 21 with the first rotating support block 15 (the second guide rod 21 has two pieces, the middle upper rotating support block 17 and the middle lower rotating support block 18 are each connected to one piece).

[0038] Preferably, the connection between the 4 clamping seats:

[0039] The four clamping seats are connected through the first guide rods 1. There are 8 first guide rods 1 in total, with two in each group.

[0040] The second clamping seat 6 is fixed with two rods in the X direction and two rods in the Y direction. The first clamping seat 4 is connected to the second clamping seat 6 through two guide rods in the X direction of the second clamping seat 6 and slides along the first guide rod 1. The third clamping seat 19 is connected to the second clamping seat 6 through two guide rods in the Y direction of the second clamping seat 6 and slides along the first guide rod 1.

[0041] The fourth clamping seat 20 also fixes two guide rods in the X direction and the Y direction respectively. The first clamping seat 4 and the third clamping seat 19 are connected to the fourth clamping seat 20 in the same manner and slide.

[0042] Furthermore, the second clamping seat 6 is connected to the second support block 7. The two first guide rods 1 fixed to the second clamping seat 6 in the Y direction pass through the two straight holes of the second support block 7 and are connected to the stop block 2. The first guide rods 1 can slide along the straight holes, and the stop block 2 can slide along the first guide rods 1. Under the restriction of the second support block 7's limit groove, it can only move in contact with the second support block 7, effectively preventing the entire mechanism from rotating rapidly around the middle and lower rotation. The two first guide rods 1 of the second clamping seat 6 in the X direction are connected to the first support block 3 and the stop block 2 in the same manner.

[0043] Preferably, the cylinder seat 12 is connected to the cylinder support block 24, and the cylinder seat 12 is connected to the cylinder rotating shaft 13. The cylinder seat 12 can rotate around the cylinder rotating shaft 13 and adjust the angle. After adjustment, it can be fastened to the cylinder support block 24 with screws to achieve the purpose of fixing the angle unchanged.

[0044] Preferably, the cylinder 8 is fixed on the cylinder base 12 and moves with the cylinder base 12. One end of the connecting rod 22 is fixed to the ejection shaft of the cylinder 8 through the connecting rod fixing block 23, and the other end is connected to the second clamping seat 6 through a pin.

[0045] The specific working process of the present invention is:

[0046] 1. Adjust the angle between the ejection axis of the cylinder 8 and the X-axis according to the side length of the workpiece, so that the clamping block 5 fits tightly against the four sides of the workpiece. At this time, fix the cylinder seat 12 with screws.

[0047] 2. The ejection shaft of the cylinder 8 pushes the second clamping seat 6 via the connecting rod 22. The second clamping seat 6 drives the first clamping seat 4 and the third clamping seat 19 via the first guide rod 1. The third clamping seat 19 and the first clamping seat 4 jointly act on the fourth clamping seat 20 via the first guide rod 1, causing the fourth clamping seat 20 to also move along the first guide rod 1. Constrained by the second guide rod 21, the middle upper rotation support block 17, the middle lower rotation support block 18, the stop block 2, and the first support block 3, the four clamping seats are clamped toward the center with the rotation axis of the middle lower rotation support block 18 as the center, thus achieving self-centering clamping.

[0048] As mentioned above, this can effectively distribute the workpiece shape error to both sides, thereby reducing error accumulation, and the fixture can adapt to quadrilateral workpieces with different side lengths, with strong versatility. After adjustment, the cylinder can be clamped quickly, thereby improving work efficiency.

Claims

1. A four-side variable length clamping fixture, comprising a base plate (14) and a first support block (3), a second support block (7), and a cylinder support block (24) sequentially arranged on the base plate (14), characterized in that: A middle lower rotating support block (18) connected to the bottom plate (14) is provided between the first supporting block (3) and the second supporting block (7), and a middle upper rotating support block (17) is connected to the middle lower rotating support block (18); the middle upper rotating support block (17) and the middle lower rotating support block (18) are respectively connected to the first rotating support block (15) and the second rotating support block (16) through the second guide rod (21); the first rotating support block (15) and the second rotating support block (16) are respectively symmetrically arranged at the two ends of the second guide rod (21); the second rotating support blocks (16) at the two ends are respectively connected to The fourth clamping seat (20) and the second clamping seat (6), the first rotating support blocks (15) at both ends are respectively connected to the third clamping seat (19) and the first clamping seat (4), the first clamping seat (4), the second clamping seat (6), the third clamping seat (19), and the fourth clamping seat (20) are connected through a plurality of first guide rods (1); the cylinder support block (24) is connected to the cylinder (8) and the cylinder rotating shaft (13) through the cylinder seat (12), the ejection shaft of the cylinder (8) is connected to the connecting rod (22) through the connecting rod fixing block (23), and the connecting rod (22) is connected to the second clamping seat (6); The first support block (3), the second support block (7), and the cylinder support block (24) are all fixed to the base plate (14) by screws and pins, and the second clamping seat (6) is connected to the connecting rod (22) by a pin shaft; The middle and lower rotating support block (18) is rotatably connected to the bottom plate (14) via a rotating pin, and the middle and upper rotating support block (17) is rotatably connected to the middle and lower rotating support block (18) via a rotating pin; The first rotating support block (15) and the second rotating support block (16) are respectively slidably connected to the second guide rod (21); The second clamping seat (6) fixes two first guide rods (1) in the X direction and the Y direction respectively; the first clamping seat (4) is connected to the second clamping seat (6) through the two first guide rods (1) in the X direction of the second clamping seat (6) and slides along the first guide rods (1); the third clamping seat (19) is connected to the second clamping seat (6) through the two first guide rods (1) in the Y direction and slides along the first guide rods (1); the fourth clamping seat (20) fixes two first guide rods (1) in the X direction and the Y direction respectively; the first clamping seat (4) is connected to the fourth clamping seat (20) through the two first guide rods (1) in the X direction of the fourth clamping seat (20) and slides along the first guide rods (1); the third clamping seat (19) is connected to the second clamping seat (20) through the two first guide rods (1) in the Y direction and slides along the first guide rods (1).

2. The four-side variable length clamp according to claim 1, characterized in that: The cylinder seat (12) is connected to the cylinder rotating shaft (13) through a shaft clamp (9), a shaft sleeve (10) and an angular contact ball bearing (11).

3. The four-side variable length clamp according to claim 1, characterized in that: The fourth clamping seat (20) and the second clamping seat (6) can slide along the second guide rod (21) along with the second rotating support block (16), and the first clamping seat (4) and the third clamping seat (19) can slide along the second guide rod (21) along with the first rotating support block (15); the upper end surfaces of the first clamping seat (4), the second clamping seat (6), the third clamping seat (19) and the fourth clamping seat (20) are all provided with clamping blocks (5).

4. The four-side variable length clamp according to claim 1, characterized in that: The fourth clamping seat (20) is adjacent to the third clamping seat (19), and the first clamping seat (4) is adjacent to the second clamping seat (6).

5. The four-side variable length clamp according to claim 1, characterized in that: Two first guide rods (1) form a group, and the first clamping seat (4), the second clamping seat (6), the third clamping seat (19), and the fourth clamping seat (20) are respectively connected through a group of first guide rods (1).

6. The four-side variable length clamp according to claim 1, characterized in that The two first guide rods (1) fixed on the second clamping seat (6) in the Y direction pass through the two straight holes on the second support block (7) and are slidably connected to the stop block (2), and a limiting groove is provided on the second support block (7), and the stop block (2) can only move in conjunction with the second support block (7); the two first guide rods (1) fixed on the second clamping seat (6) in the X direction pass through the two straight holes on the first support block (3) and are slidably connected to the stop block (2), and a limiting groove is provided on the first support block (3), and the stop block (2) can only move in conjunction with the second support block (7).

Images