Clamping jig with adjustable clamping position

Abstract

The utility model provides a clamping fixture with adjustable clamping position, which relates to the technical field of clamping fixtures, and comprises a fixture body and two clamping arms used for clamping workpieces, a sliding groove is arranged on the table top of the fixture body, a screw rod is fixedly connected in the sliding groove, a shell sleeved on the screw rod is slidably mounted in the sliding groove, and the clamping arms are arranged on the clamping arms. A two-way threaded rod parallel to the lead screw is rotationally connected into the shell, a clamping block connected with a clamping arm is arranged in the shell, and therefore the threaded sleeve in the shell rotates, and the threaded sleeve drives the shell to move at the same time by means of the characteristics that the threaded sleeve is in threaded connection with the lead screw and the lead screw cannot rotate; and then the shell drives the two clamping blocks and the two clamping arms to move at the same time, that is, direct and rapid movement of the workpiece is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping fixtures, in particular to a clamping fixture with adjustable clamping positions. Background Art

[0002] A clamping fixture refers to a device used in the mechanical manufacturing process to fix a processing object, make it occupy the correct position, and accept construction or inspection, also known as a fixture. However, the position of the workpiece clamped by the clamping fixture is fixed relative to the fixture. In order to further expand the functions of the clamping fixture.

[0003] A clamping fixture with adjustable clamping positions, with the publication number of CN104308598A, includes a base, a first clamping block and a second clamping block both arranged on the base and capable of horizontal movement and vertical movement relative to the base respectively. The first clamping block and the second clamping block are respectively provided with a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate are arranged opposite to each other and form a space for clamping the workpiece therebetween. When in use, first place the workpiece on the base, rotate the push rod so that the first clamping plate abuts against one surface of the workpiece, and then rotate the ejector rod so that the second clamping plate abuts against the other surface of the workpiece. By rotating the push rod and the ejector rod, the clamping position of the second clamping plate can be adjusted, so as to achieve the purpose of flexibly adjusting the clamping position of the fixture.

[0004] However, because the push rod and the ejector rod are two separate drives, when adjusting the positions of the first clamping plate and the second clamping plate, it is necessary to rotate the push rod and the ejector rod in sequence, that is, the first clamping plate and the second clamping plate move separately and then clamp the workpiece, which is rather troublesome. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems of the prior art, and a clamping fixture with adjustable clamping positions is proposed.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A clamping fixture with adjustable clamping positions includes a fixture body and two clamping arms for clamping the workpiece. A chute is provided on the table surface of the fixture body. A lead screw is fixedly connected in the chute, and a housing sleeved on the lead screw is slidably installed. A bidirectional threaded rod parallel to the lead screw is rotatably connected in the housing. Clamping blocks for respectively installing the two clamping arms are threadedly connected to both threaded portions on both sides of the bidirectional threaded rod and penetrate through the top edge of the housing. A threaded sleeve threadedly connected to the lead screw is rotatably connected in the housing, and an electric push rod parallel to the threaded sleeve is rotatably installed. One end of the outer wall of the threaded sleeve is fixedly connected with a toothed ring, and the telescopic end of the electric push rod is fixedly connected with a motor, and a spur gear meshed with the toothed ring is fixedly connected to the main shaft of the motor.

[0007] Preferably, a limiting frame is fixedly connected to one side of the tabletop of the jig body away from the sliding groove, and a roller perpendicular to the tabletop of the jig body is rotatably connected inside the limiting frame.

[0008] Preferably, a number of screw rods penetrating through the clamping block are fixedly connected to one side of the clamping arm, and a nut threadedly connected to the screw rod is rotatably connected to the clamping block.

[0009] Preferably, sliding frames are rotatably connected to one end of the spur gear and the cylinder part of the electric push rod. The two ends of the sliding frame at the spur gear extend and are inserted into the inner wall of the housing, and the two ends of the sliding frame at the cylinder part of the electric push rod extend and are fixed to the inner wall of the housing.

[0010] Preferably, a gear block is fixedly connected to the end of the cylinder of the electric push rod. A rack meshing with the gear block is inserted into one of the sliding frames, and an electric telescopic rod is connected between the rack and the sliding frame.

[0011] Preferably, a toothed ring is also fixedly connected to the middle position of the bidirectional threaded rod, and the two toothed rings are distributed in a staggered manner and are located on both sides of the spur gear.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0013] 1. In the present utility model, through the clamping block connected to the clamping arm, and the clamping block is arranged inside the housing. Therefore, by rotating the threaded sleeve inside the housing, and utilizing the threaded connection between the threaded sleeve and the lead screw and the characteristic that the lead screw cannot rotate, the threaded sleeve drives the housing to move simultaneously, thereby realizing that the housing drives the two clamping blocks and the two clamping arms to move simultaneously, that is, realizing the direct and rapid movement of the workpiece.

[0014] 2. In the present utility model, by using the expansion and contraction of the electric telescopic rod to realize the movement of the rack, the gear block connected in mesh can be driven to rotate a certain angle, that is, ensuring that the spur gear meshes with the toothed ring smoothly. And when the set rack does not move, the corresponding gear block and the electric push rod connected to the gear block will not rotate, thereby ensuring that the spur gear can rotate smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a three-dimensional structural diagram of a clamping jig with adjustable clamping position proposed by the present utility model;

[0016] Figure 2 FIG. is a clamping jig with adjustable clamping position proposed by the present utility model Figure 1 of a cross-sectional structural diagram;

[0017] Figure 3 FIG. is a structural diagram of the housing of a clamping jig with adjustable clamping position proposed by the present utility model;

[0018] Figure 4 is Figure 3 a schematic cross-sectional structure diagram of

[0019] Legend: 1. chute; 2. clamping arm; 3. jig body; 4. limit frame; 5. roller; 6. housing; 7. block; 8. screw; 9. motor; 10. bidirectional threaded rod; 11. lead screw; 12. threaded sleeve; 13. toothed ring; 14. spur gear; 15. electric push rod; 16. gear block; 17. rack; 18. electric telescopic rod; 19. sliding frame. Specific embodiments

[0020] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the limitations of the specific embodiments disclosed in the following specification.

[0022] Such as Figures 1-4As shown in the figure, a clamping fixture with adjustable clamping positions includes a fixture body 3 and two clamping arms 2 for clamping workpieces. A chute 1 is provided on the tabletop of the fixture body 3. A lead screw 11 is fixedly connected in the chute 1, and a housing 6 sleeved on the lead screw 11 is slidably installed. The housing 6 moves in the chute 1 along the length direction of the lead screw 11. A bidirectional threaded rod 10 parallel to the lead screw 11 is rotatably connected inside the housing 6. At both threaded parts on both sides of the bidirectional threaded rod 10, there are clamping blocks 7 that penetrate through the top edge of the housing 6 and are used to install the two clamping arms 2 respectively. By using the bidirectional threaded rod 10 inside the housing 6, the relative positions of the two clamping blocks 7 are adjusted. Furthermore, by adjusting the positions of the clamping blocks 7, the positions of the clamping arms 2 are adjusted to clamp or release the workpiece. And the two clamping arms 2 move as a whole under the movement of the bidirectional threaded rod 10 in the housing 6, thereby driving the workpiece to move when it is clamped by the two clamping arms 2. A threaded sleeve 12 threadedly connected to the lead screw 11 is rotatably connected inside the housing 6, and an electric push rod 15 parallel to the threaded sleeve 12 is rotatably installed. One end of the outer wall of the threaded sleeve 12 is fixedly connected with a toothed ring 13, and the telescopic end of the electric push rod 15 is fixedly connected with a motor 9, and the main shaft of the motor 9 is fixedly connected with a spur gear 14 meshed with the toothed ring 13. By using the electric push rod 15 to extend and retract until the spur gear 14 meshes with the toothed ring 13 outside the threaded sleeve 12, the motor 9 can be driven to rotate the spur gear 14, and then the meshed toothed ring 13 can drive the corresponding threaded sleeve 12 to rotate. Under the condition that the lead screw 11 cannot rotate, the threaded sleeve 12 drives the housing 6 to slide on the surface of the lead screw 11.

[0023] In addition: A limiting frame 4 is fixedly connected to the side of the tabletop of the fixture body 3 away from the chute 1. A roller 5 perpendicular to the tabletop of the fixture body 3 is rotatably connected inside the limiting frame 4. The limiting frame 4 and the two clamping arms 2 are used to clamp the workpiece on four sides to prevent the workpiece from detaching from the two clamping arms 2. The additionally provided roller 5 can rotate when the workpiece moves, that is, it can prevent the side of the workpiece from contacting and scratching the side of the limiting frame 4. In the use of this solution, the roller 5 can also be selected to be installed on the tabletop of the fixture body 3. The workpiece moves on the surface of the roller 5 to reduce the frictional resistance during the movement. A number of screws 8 penetrating through the clamping block 7 are fixedly connected to one side of the clamping arm 2, and a nut threadedly connected to the screw 8 is rotatably connected to the clamping block 7. By rotating the nut, the screw 8 can drive the clamping arm 2 to move relative to the clamping block 7, and thus the size of the workpiece that can be placed between the clamping arm 2 and the limiting frame 4 can be adjusted.

[0024] In addition, sliding brackets 19 are rotatably connected to one end of the spur gear 14 and the cylinder part of the electric push rod 15. The two ends of the sliding bracket 19 at the spur gear 14 extend and are inserted into the inner wall of the housing 6. The two ends of the sliding bracket 19 at the cylinder of the electric push rod 15 extend and are fixed to the inner wall of the housing 6. The provided sliding bracket 19 ensures the stable position of the cylinder of the electric push rod 15, and when the electric push rod 15 expands and contracts, the motor 9 and the spur gear 14 installed at its telescopic end slide along a constant direction. A gear block 16 is fixedly connected to the end of the cylinder of the electric push rod 15. A rack 17 meshing with the gear block 16 is inserted on one of the sliding brackets 19, and an electric telescopic rod 18 is connected between the rack 17 and the sliding bracket 19. By the expansion and contraction of the electric telescopic rod 18, the rack 17 moves, and then the meshing gear block 16 can drive the electric push rod 15 to rotate by a certain angle, which ensures that the spur gear 14 meshes with the toothed ring 13 smoothly. A toothed ring 13 is also fixedly connected to the middle position of the bidirectional threaded rod 10. The two toothed rings 13 are staggeredly distributed and located on both sides of the spur gear 14. By adjusting the position of the spur gear 14 to mesh with the toothed ring 13 on the bidirectional threaded rod 10, the motor 9 can drive the bidirectional threaded rod 10 to rotate, and then the two clamping blocks 7 can drive the corresponding clamping arms 2 to move.

[0025] Working principle: During use, rotate the nut on the clamping block 7 according to the width of the workpiece, and then adjust the distance between the clamping arm 2 and the limiting frame 4. Then place the workpiece between the two clamping arms 2 and the limiting frame 4. The electric push rod 15 extends to make the spur gear 14 mesh with the toothed ring 13 on the bidirectional threaded rod 10. The motor 9 drives the spur gear 14 to rotate, and the meshing toothed ring 13 drives the bidirectional threaded rod 10 to rotate, that is, the two clamping blocks 7 drive the corresponding clamping arms 2 to approach each other to clamp the workpiece. Then the electric push rod 15 contracts to make the spur gear 14 mesh with the toothed ring 13 on the threaded sleeve 12, and the motor 9 can drive the threaded sleeve 12 to rotate, that is, the threaded sleeve 12 drives the housing 6, the clamping block 7, the clamping arm 2 and the clamped workpiece to move simultaneously.

[0026] The wiring diagrams of the motor 9, the electric push rod 15 and the electric telescopic rod 18 in the present utility model belong to the common knowledge in the art. Their working principles are already well-known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the motor 9, the electric push rod 15 and the electric telescopic rod 18 will not be explained in detail.

[0027] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A clamping fixture with adjustable clamping positions, comprising a fixture body (3) and two clamping arms (2) for clamping workpieces, characterized in that: The tabletop of the jig body (3) is provided with a chute (1). A lead screw (11) is fixedly connected in the chute (1), and a housing (6) sleeved on the lead screw (11) is slidably installed. A bidirectional lead screw (10) parallel to the lead screw (11) is rotatably connected in the housing (6). Clamping blocks (7) for respectively installing two clamping arms (2) are threadedly connected to both threaded portions on both sides of the bidirectional lead screw (10) and penetrate through the top edge of the housing (6). A threaded sleeve (12) threadedly connected to the lead screw (11) is rotatably connected in the housing (6), and an electric push rod (15) parallel to the threaded sleeve (12) is rotatably installed. One end of the outer wall of the threaded sleeve (12) is fixedly connected with a toothed ring (13). A motor (9) is fixedly connected to the telescopic end of the electric push rod (15), and a spur gear (14) meshed with the toothed ring (13) is fixedly connected to the main shaft of the motor (9).

2. The clamping fixture with adjustable clamping position according to claim 1, wherein: A limiting frame (4) is fixedly connected to one side of the tabletop of the jig body (3) away from the chute (1). A roller (5) perpendicular to the tabletop of the jig body (3) is rotatably connected in the limiting frame (4).

3. The clamping fixture with adjustable clamping position according to claim 1, wherein: A plurality of screws (8) penetrating through the clamping blocks (7) are fixedly connected to one side of the clamping arm (2), and nuts threadedly connected to the screws (8) are rotatably connected to the clamping blocks (7).

4. The clamping fixture with adjustable clamping position according to claim 1, wherein: Sliding frames (19) are rotatably connected to one end of the spur gear (14) and the cylinder part of the electric push rod (15). The two ends of the sliding frame (19) at the spur gear (14) extend and are inserted into the inner wall of the housing (6). The two ends of the sliding frame (19) at the cylinder of the electric push rod (15) extend and are fixed to the inner wall of the housing (6).

5. The clamping fixture with adjustable clamping position according to claim 4, wherein: A gear block (16) is fixedly connected to the end of the cylinder of the electric push rod (15). A rack (17) meshed with the gear block (16) is inserted into one of the sliding frames (19), and an electric telescopic rod (18) is connected between the rack (17) and the sliding frame (19).

6. The clamping fixture with adjustable clamping position according to claim 1, characterized in that: A toothed ring (13) is also fixedly connected to the middle position of the bidirectional lead screw (10). The two toothed rings (13) are staggeredly distributed and are located on both sides of the spur gear (14).

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