Special fixture for machining

Abstract

The utility model relates to the technical field of machining fixtures, and discloses a special fixture for machining, which comprises a base and a supporting column, a motor is arranged on one side of the base, a first clamping block is arranged on one side of the supporting column, one end of the first clamping block is fixedly connected with a first movable plate, and the first movable plate is movably connected in the supporting column. A first rack is fixedly connected to the bottom of the first movable plate, a gear is connected to the bottom of the first rack in an engaged mode, a movable rod is fixedly connected to one side of the gear, a handle is fixedly connected to one end of the movable rod, and a second clamping block is arranged on one side of the first clamping block. The gear rotates to drive the first rack and the second rack to be away from each other in a staggered mode, the first rack drives the first movable plate and the first clamping block to move, the second rack drives the second movable plate and the second clamping block to move, the first clamping block and the second clamping block are made to be away from each other, and therefore sliding bearings of different sizes can be clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of machining fixtures, in particular to a special fixture for machining. Background Art

[0002] In modern mechanical manufacturing, machining is the most widely used processing method. All parts with high precision requirements or fine surface roughness requirements need to be machined on machine tools. At present, the fixtures used for processing on machine tools are mostly manually operated and have a relatively simple structure. For some irregularly shaped parts, clamping is a problem. It is difficult to keep the clamping force of manual clamping consistent each time, which makes it difficult to ensure product quality. Therefore, it is very important to provide a scientific and reasonable fixture.

[0003] A Chinese utility model patent with announcement number CN217071605U discloses a special fixture for machining the inner oil groove of a sliding bearing, which belongs to the technical field of machining fixtures. The structure of a bidirectional screw is used to control the movement of the clamping plates and the fixing block on both sides, and the movement distance of the clamping plates on both sides is the same. After the clamp fixes the sliding bearing, it is kept at the center above the base to facilitate machining of the inner oil groove. The sliding bearing is clamped and fixed by the elastic telescopic structure of the clamping plate, and the inner wall of the inner end of the clamping plate is set as a bevel to facilitate inserting the two sides of the sliding bearing into the clamping plate, thereby improving the clamping efficiency. The two ends of the sliding bearing are supported by the support rods on both sides to prevent it from shaking left and right, which causes deviations in the inner oil groove processing.

[0004] With respect to the existing related technologies, the inventors believe that the following defects exist: in the prior art, since the size of the clamp is fixed, when the size of the sliding bearing required is too large, the two sides of the sliding bearing will not be able to be inserted into the clamp and clamped, thereby making the applicability of the clamp low. Utility Model Content

[0005] In order to solve the technical problem that the size of the clamp is fixed, when the size of the sliding bearing is too large, the two sides of the sliding bearing cannot be inserted into the clamp and clamped, thereby making the applicability of the clamp low, the utility model provides a special clamp for machining.

[0006] The utility model is implemented by the following technical scheme: a special fixture for machining, comprising a base and a support column, a motor is arranged on one side of the base, one end of the motor is fixedly connected with a bidirectional threaded rod, the bidirectional threaded rod is rotatably connected to the inner groove of the base, the bottom of the support column is located in the inner groove of the base, the bottoms of the two support columns are threadedly connected to the two ends of the bidirectional threaded rod, a first clamping block is arranged on one side of the support column, one end of the first clamping block is fixedly connected with a first movable plate, the first movable plate is movably connected to the inside of the support column, the bottom of the first movable plate is fixedly connected with a first rack, the bottom of the first rack is meshingly connected with a gear, one side of the gear is fixedly connected with a movable rod, and one end of the movable rod is fixedly connected with a handle;

[0007] A second clamping block is arranged on one side of the first clamping block, one end of the second clamping block is fixedly connected to a second movable plate, the top of the second movable plate is fixedly connected to a second rack, and the top of the second rack is meshingly connected to the bottom of the gear.

[0008] Preferably, the first clamping block and the second clamping block are symmetrical semi-cylindrical in shape, and the outer ends of the first clamping block and the second clamping block are processed into bevel cuts.

[0009] Preferably, a first sliding block is processed on the top of the first movable plate and a first sliding groove is processed inside the support column, and the first sliding block is movably connected inside the first sliding groove.

[0010] Preferably, one side of each of the first movable plate and the second movable plate is fixedly connected with a second sliding block, a second sliding groove is processed inside the support column, and the second sliding block is movably connected inside the second sliding groove.

[0011] Preferably, one end of the movable rod is rotatably connected to the inside of the support column, and the other end of the movable rod is located outside the support column.

[0012] Preferably, one end of the handle is movably connected to a limiting column, one side of the support column is processed with a plurality of limiting holes, and one end of the limiting column is plug-connected inside the limiting hole.

[0013] Preferably, one end of the limiting column is fixedly connected to the limiting block, and a return spring is externally arranged at one end of the limiting column.

[0014] Preferably, one end of the return spring is fixedly connected to the outside of the handle, and the other end of the return spring is fixedly connected to the inner side of the limit block.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] When the utility model is in use, by rotating the handle, the handle will drive the movable rod to rotate, the rotation of the movable rod will drive the gear to rotate, the rotation of the gear will respectively drive the first rack and the second rack to move away from each other, the first rack will drive the first movable plate and the first clamping block to move, the second rack will drive the second movable plate and the second clamping block to move, so that the first clamping block and the second clamping block are separated from each other, so that sliding bearings of different sizes can be clamped, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a connection structure diagram of the second sliding block and the second sliding groove of the utility model;

[0019] Figure 3 This is a cross-sectional view of the inner layer of the support column of the utility model;

[0020] Figure 4 For the utility model Figure 1 Enlarged schematic diagram of part A in the middle.

[0021] In the figure: 1. base; 2. support column; 3. first clamping block; 4. second clamping block; 5. first movable plate; 6. second movable plate; 7. bidirectional threaded rod; 8. motor; 9. handle; 10. movable rod; 11. gear; 12. first rack; 13. second rack; 14. first slider; 15. first slide groove; 16. second slider; 17. second slide groove; 18. limit hole; 19. limit column; 20. reset spring; 21. limit block. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0023] Example 1: Please refer to Figure 1 - Figure 4A special fixture for machining in this embodiment includes a base 1 and a support column 2, a motor 8 is arranged on one side of the base 1, one end of the motor 8 is fixedly connected to a bidirectional threaded rod 7, the bidirectional threaded rod 7 is rotatably connected to the internal groove of the base 1, the bottom of the support column 2 is located in the internal groove of the base 1, the bottoms of the two support columns 2 are threadedly connected to the two ends of the bidirectional threaded rod 7, a first clamping block 3 is arranged on one side of the support column 2, one end of the first clamping block 3 is fixedly connected to a first movable plate 5, the first movable plate 5 is movably connected to the inside of the support column 2, the bottom of the first movable plate 5 is fixedly connected to a first rack 12, the bottom of the first rack 12 is meshingly connected to a gear 11, one side of the gear 11 is fixedly connected to a movable rod 10, one end of the movable rod 10 is fixedly connected to a handle 9, a second clamping block 4 is arranged on one side of the first clamping block 3, one end of the second clamping block 4 is fixedly connected to a second movable plate 6, the top of the second movable plate 6 is fixedly connected to a second rack 13, and the top of the second rack 13 is meshingly connected to the bottom of the gear 11;

[0024] When the sliding bearing needs to be clamped, the motor 8 is started, the motor 8 will drive the bidirectional threaded rod 7 to rotate, the bidirectional threaded rod 7 will drive the two support columns 2 to approach each other, and the two support columns 2 will respectively drive the two first clamping blocks 3 and the second clamping blocks 4 to approach each other to clamp the sliding bearing;

[0025] Secondly, when it is necessary to clamp a larger sliding bearing, the handle 9 is turned, the handle 9 will drive the movable rod 10 to rotate, the movable rod 10 will drive the gear 11 to rotate, the gear 11 will drive the first rack 12 and the second rack 13 to move respectively, so that the first rack 12 and the second rack 13 are displaced away from each other, the first rack 12 will drive the first movable plate 5 to move, so that the first movable plate 5 drives the first clamping block 3 to move, the second rack 13 will drive the second movable plate 6 to move, so that the second movable plate 6 drives the second clamping block 4 to move, and then the first clamping block 3 and the second clamping block 4 are moved away from each other;

[0026] Furthermore, the first clamp block 3 and the second clamp block 4 are symmetrical semi-cylindrical, and the outer ends of the first clamp block 3 and the second clamp block 4 are processed into bevel cuts, and the sliding bearing is fixed by transversely clamping the sliding bearing between the first clamp block 3 and the second clamp block 4, and the two ends of the sliding bearing extend into the interior of the first clamp block 3 and the second clamp block 4 and contact the bevel cuts;

[0027] Furthermore, the top of the first movable plate 5 and the bottom of the second movable plate 6 are both processed with a first slider 14, the interior of the support column 2 is processed with a first slide groove 15, the first slider 14 is movably connected to the interior of the first slide groove 15, and by providing the first slider 14, when the first movable plate 5 and the second movable plate 6 move, the first movable plate 5 and the second movable plate 6 both drive the first slider 14 to move inside the first slide groove 15, thereby limiting the moving position of the first movable plate 5 and the second movable plate 6, and preventing the first movable plate 5 and the second movable plate 6 from being separated from the interior of the support column 2;

[0028] Further, one side of the first movable plate 5 and the second movable plate 6 are both fixedly connected with a second slider 16, the interior of the support column 2 is processed with a second slide groove 17, and the second slider 16 is movably connected to the interior of the second slide groove 17. By providing the second slider 16, when the first movable plate 5 and the second movable plate 6 move, the first movable plate 5 and the second movable plate 6 both drive the second slider 16 to move inside the second slide groove 17, thereby limiting the movement of the first movable plate 5 and the second movable plate 6, and thus keeping the first movable plate 5 and the second movable plate 6 in a stable state when moving;

[0029] Furthermore, a limiting column 19 is movably connected to one end of the handle 9, and a plurality of limiting holes 18 are processed on one side of the support column 2. One end of the limiting column 19 is plug-connected to the inside of the limiting hole 18. When the position adjustment of the first clamping block 3 and the second clamping block 4 is completed, the limiting column 19 is plugged into the inside of the limiting hole 18, so that the rotation of the handle 9 can be limited, and the position of the first clamping block 3 and the second clamping block 4 can be fixed;

[0030] Furthermore, one end of the limit column 19 is fixedly connected to the limit block 21, and a return spring 20 is arranged on the outside of one end of the limit column 19, one end of the return spring 20 is fixedly connected to the outside of the handle 9, and the other end of the return spring 20 is fixedly connected to the inside of the limit block 21. When the handle 9 needs to be turned, the limit block 21 is pulled, and the limit block 21 will drive the limit column 19 to move outward, so that the limit column 19 is separated from the inside of the limit hole 18, and the return spring 20 will extend at the same time. When the handle 9 needs to be fixed, the limit block 21 is released, the return spring 20 will reset and contract, and the return spring 20 will pull the limit block 21 to move, so that the limit block 21 drives the limit column 19 to be inserted into the inside of the limit hole 18.

[0031] Working principle: when it is necessary to clamp the sliding bearing, start the motor 8, the motor 8 will drive the bidirectional threaded rod 7 to rotate, the bidirectional threaded rod 7 will drive the two support columns 2 to approach each other, and the two support columns 2 will approach the sliding bearing through the two first clamping blocks 3 and the second clamping blocks 4. When it is necessary to clamp a sliding bearing of a larger size, first pull the limit block 21, the limit block 21 will drive the limit column 19 to move outward, so that the limit column 19 is disengaged from the inside of the limit hole 18, and then turn the handle 9, the handle 9 will drive the movable rod 10 to rotate, the rotation of the movable rod 10 will drive the gear 11 to rotate, the rotation of the gear 11 will respectively drive the first rack 12 and the second rack 13 to move away from each other, the first rack 12 will drive the first movable plate 5 and the first clamping block 3 to move, the second rack 13 will drive the second movable plate 6 and the second clamping block 4 to move, and then the first clamping block 3 and the second clamping block 4 will move away from each other.

[0032] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A special fixture for machining, comprising a base (1) and a support column (2), characterized in that: A motor (8) is provided on one side of the base (1), one end of the motor (8) is fixedly connected to a bidirectional threaded rod (7), the bidirectional threaded rod (7) is rotatably connected to an inner groove of the base (1), the bottom of the support column (2) is located in the inner groove of the base (1), the bottoms of the two support columns (2) are threadedly connected to the two ends of the bidirectional threaded rod (7), a first clamping block (3) is provided on one side of the support column (2), one end of the first clamping block (3) is fixedly connected to a first movable plate (5), the first movable plate (5) is movably connected inside the support column (2), the bottom of the first movable plate (5) is fixedly connected to a first rack (12), the bottom of the first rack (12) is meshingly connected to a gear (11), one side of the gear (11) is fixedly connected to a movable rod (10), one end of the movable rod (10) is fixedly connected to a handle (9); A second clamping block (4) is provided on one side of the first clamping block (3); one end of the second clamping block (4) is fixedly connected to a second movable plate (6); the top of the second movable plate (6) is fixedly connected to a second rack (13); the top of the second rack (13) is meshingly connected to the bottom of the gear (11).

2. A special fixture for machining according to claim 1, characterized in that: The first clamping block (3) and the second clamping block (4) are symmetrical semi-cylindrical in shape, and the outer ends of the first clamping block (3) and the second clamping block (4) are processed into bevel cuts.

3. A special fixture for machining according to claim 1, characterized in that: The top of the first movable plate (5) and the bottom of the second movable plate (6) are both processed with a first sliding block (14), the interior of the support column (2) is processed with a first sliding groove (15), and the first sliding block (14) is movably connected inside the first sliding groove (15).

4. A special fixture for machining according to claim 1, characterized in that: A second sliding block (16) is fixedly connected to one side of each of the first movable plate (5) and the second movable plate (6); a second sliding groove (17) is machined inside the support column (2); and the second sliding block (16) is movably connected inside the second sliding groove (17).

5. The special fixture for machining according to claim 1, characterized in that: One end of the movable rod (10) is rotatably connected to the inside of the support column (2), and the other end of the movable rod (10) is located outside the support column (2).

6. A special fixture for machining according to claim 1, characterized in that: One end of the handle (9) is movably connected to a limiting column (19), one side of the support column (2) is processed with a plurality of limiting holes (18), and one end of the limiting column (19) is plug-connected inside the limiting hole (18).

7. A special fixture for machining according to claim 6, characterized in that: One end of the limiting column (19) is fixedly connected to the limiting block (21), and a return spring (20) is provided outside one end of the limiting column (19).

8. A special fixture for machining according to claim 7, characterized in that: One end of the return spring (20) is fixedly connected to the outside of the handle (9), and the other end of the return spring (20) is fixedly connected to the inside of the limit block (21).

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