Hydraulically actuated split clamp

Abstract

This utility model discloses a hydraulically driven parting clamp, belonging to the field of clamping equipment. It includes a frame (1), a hydraulic cylinder (2), a slider (7), a connecting rod (8), clamping arms (9), and a guide assembly. The cylinder body of the hydraulic cylinder (2) is fixed to one end of the frame (1), and the rod end is connected to one end of the slider (7). The slider (7) is slidably mounted on the frame (1). The clamping arms (9) are located on both sides of the slider (7) and are hinged to the slider (7) via the connecting rod (8). The guide assembly allows the two clamping arms (9) to move along the clamping direction. An arc-shaped opening is provided on the inner side of the clamping arm (9), and a parting block (11) with an opening slides within the opening. The clamping head of this structure consists of multiple slidingly combined parting blocks (11), which move linearly along the clamping direction when clamping the workpiece, resulting in stable clamping and enabling the clamping of various irregularly shaped workpieces. This solves the problems of high cost or poor stability in clamping irregular polygonal parts in existing equipment.

Description

Technical Field

[0001] This utility model discloses a hydraulically driven parting fixture, belonging to the field of fixture equipment. Background Technology

[0002] Fixtures are used to hold and hold workpieces for machining, assembly, inspection, or other industrial operations. The purpose of a fixture is to keep the workpiece in the correct position so that the operator or machine can process it precisely. While there are many types of fixtures available, the variety of parts is even greater, such as irregularly shaped polygonal parts with protrusions or grooves. Existing ordinary fixtures cannot effectively hold such parts, causing misalignment during machining. Furthermore, due to the irregular shape of the workpiece, it is easy for the workpiece to slip out of the chuck during the clamping process, making it impossible for the device to effectively hold the workpiece.

[0003] There are currently two methods for clamping irregularly shaped parts. One method is to use a dedicated fixture, which utilizes contouring to clamp irregularly shaped parts. For example, Chinese patent CN202420908174.7 discloses a positioning fixture for irregularly shaped workpieces. This type of fixture has a relatively limited range of applications. The other method is to use a more general-purpose fixture. For example, Chinese patent CN202420916415.2 discloses an auxiliary fixture for irregularly shaped workpieces. This fixture can clamp workpieces of a certain size range. However, its chuck moves in a planar motion when clamping the workpiece, which affects the stability of the clamping. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing equipment has high cost or poor stability when clamping irregular polygonal parts.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a hydraulically driven parting fixture, including a frame, a hydraulic cylinder, a slider, a connecting rod, a clamping arm and a guide assembly. The cylinder body end of the hydraulic cylinder is fixed to one end of the frame, and the rod body end is connected to one end of the slider. The slider is slidably mounted on the frame, and the clamping arms are mounted on both sides of the slider. The clamping arms are hinged to the slider through the connecting rod. The guide assembly enables the two clamping arms to move only along the clamping direction. An arc-shaped opening is provided on the inner side of the clamping arm away from the hinge end. A parting block that can slide along the arc-shaped sidewall is provided in the opening. An opening is provided on the side of the parting block away from the clamping arm.

[0006] In the above structure, the parting block is an arc-shaped structure, and a T-shaped slide rail is provided on the outer arc-shaped sidewall. A matching T-shaped slide groove is provided in the opening of the clamping arm. The slide rail is slidably disposed in the slide groove so that the parting block and the clamping arm are slidably connected.

[0007] Furthermore, in the above structure, the openings of the parting block away from the clamping arm are spaced at least two, and the openings are in an arc shape. Each opening contains an arc-shaped parting block A. A T-shaped slide rail is provided on the arc-shaped sidewall of parting block A. A matching T-shaped slide groove is provided in the opening of the parting block. The slide rail is slidably disposed in the slide groove so that parting block A is slidably connected to parting block A. The opening of parting block A away from parting block A is provided.

[0008] Furthermore, in the above structure, the openings of the parting block A away from the parting block side are spaced at least two, and the openings are in an arc shape. An arc-shaped parting block B is provided in the opening, and a T-shaped slide rail is provided on the arc-shaped sidewall of parting block B. A matching T-shaped slide groove is provided in the opening of parting block A. The slide rail is slidably disposed in the slide groove so that parting block B and parting block A are slidably connected, and the opening of parting block B away from parting block A is provided.

[0009] The above structure also includes a workpiece stage, which is set on the frame and located below the end of the clamping arm away from the slider 7. The upper end of the workpiece stage is provided with guide grooves at intervals along the clamping direction of the clamping arm, and the lower end of the clamping arm is provided with a matching guide block, which is correspondingly locked in the guide groove.

[0010] Furthermore, the guide groove in the above structure is a dovetail groove or a T-shaped groove.

[0011] The guiding component in the above structure includes a guide rod, which is mounted on the frame and located on both sides of the slider. The clamping arm has a strip-shaped limiting hole at the end near the hydraulic cylinder. The length direction of the limiting hole is perpendicular to the axial direction of the hydraulic cylinder, and the upper end of the guide rod passes through the limiting hole.

[0012] In the above structure, the upper end of the frame is provided with a slide groove arranged along the axial direction of the hydraulic cylinder, and the lower end of the slider is slidably disposed in the slide groove.

[0013] Furthermore, the slider section in the above structure is a cross-shaped structure, and the connecting rod has U-shaped openings at both ends. One end of the connecting rod is inserted into the horizontal plate on the upper side of the slider and then hinged by a pin, while the other end is inserted into the clamping arm and then hinged by a pin.

[0014] In the above structure, the single-sided clamping arm is hinged to the slider through two parallel connecting rods.

[0015] The beneficial effects of this utility model are as follows: This structure uses hydraulic drive to operate multiple chucks, and each chuck is composed of multiple slidingly connected arc-shaped parting blocks. When clamping a workpiece, the chucks move linearly along the clamping direction, ensuring stable clamping. The slidingly arranged arc-shaped parting blocks can slide appropriately, enabling the clamping of various sizes of irregularly shaped workpieces. Furthermore, the use of hydraulic drive facilitates intelligent clamping. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a partial exploded view of the present invention.

[0018] Figure 3 This is a schematic diagram of the parting block structure of this utility model.

[0019] Figure 4 This is a top view of the structure of this utility model.

[0020] Figure 5 This utility model Figure 4 Schematic diagram of the cross-sectional structure of AA.

[0021] Figure 6 This utility model Figure 4 Schematic diagram of the cross-sectional structure of BB.

[0022] Figure 7 This utility model Figure 4 Schematic diagram of the CC cross-section structure.

[0023] The components in the diagram are labeled as follows: 1. Frame, 2. Hydraulic cylinder, 3. Bolt, 4. Workpiece table, 41. Guide groove, 5. Support column, 6. Connecting shaft, 7. Slider, 8. Linkage rod, 9. Clamping arm, 10. Pin, 11. Parting block, 12. Parting block A, 13. Parting block B. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1 to 7As shown, the hydraulically driven parting fixture of this utility model includes a frame 1, a hydraulic cylinder 2, a slider 7, a connecting rod 8, a clamping arm 9, and a guide assembly. The cylinder body of the hydraulic cylinder 2 is fixed to one end of the frame 1, and the rod body is connected to one end of the slider 7. The slider 7 is slidably mounted on the frame 1. The clamping arms 9 are mounted on both sides of the slider 7. The clamping arms 9 are hinged to the slider 7 through the connecting rod 8. The guide assembly allows the two clamping arms 9 to move only along the clamping direction. The inner side of the clamping arm 9 away from the hinge end is provided with an arc-shaped opening. A parting block 11 that can slide along the arc-shaped sidewall is provided in the opening. The parting block 11 is provided with an opening on the side away from the clamping arm 9. Those skilled in the art will understand that the cylinder body of the hydraulic cylinder 2 in this structure is fixed to one end of the frame 1, preferably connected to the frame 1 by four bolts 3, and the rod end is connected to one end of the slider 7. Preferably, threaded holes are provided on the extended end of the rod and the end face of the slider 7. The rod end is connected to the slider 7 by screwing the threaded connecting shaft 6 at both ends into the corresponding threaded holes. In this way, the extension and retraction movement of the rod of the hydraulic cylinder 2 drives the slider 7 to move back and forth on the slide groove of the frame 1. The clamping arms 9 are located on both sides of the slider 7 and are hinged to the slider 7 via connecting rods 8. The guide assembly ensures that the clamping arms 9 can only move along the clamping direction, i.e., the distance between the two clamping arms 9, or the clamping direction. Therefore, the back-and-forth movement of the slider 7 will cause the two clamping arms 9 to clamp or release via connecting rods 8. This structure has an arc-shaped opening on the inner side of the clamping arms 9 away from the hinge end. The arc shape is an arched structure shaped like a bow and arrow. A parting block 11 that can slide along the arc-shaped sidewall is set in the opening. The parting block 11 has an opening on the side away from the clamping arms 9. This allows the movement of the parting block 11 to follow the law of least resistance when clamping the workpiece. The parting block 11 reciprocates in planar sliding motion, achieving multi-point clamping and maximizing the clamping force. At the same time, the movements of the parting blocks 11 are coordinated with each other, thereby completing the clamping of irregularly shaped parts.

[0026] Preferably, the parting block 11 in the above structure is an arc-shaped structure, and a T-shaped slide rail 15 is provided on the outer arc-shaped sidewall. A matching T-shaped groove 16 is provided in the opening of the clamping arm 9, and the slide rail 15 is slidably disposed in the groove 16, so that the parting block 11 and the clamping arm 9 are slidably connected. Those skilled in the art will understand that, in a further preferred embodiment, the parting block 11 and the clamping arm 9 are slidably connected in the following specific structure: the parting block 11 is an arc-shaped structure, and a T-shaped slide rail 15 is provided on the outer arc-shaped sidewall. A matching T-shaped groove 16 is provided in the opening of the clamping arm 9, and the groove is arranged along the arc surface inside the opening of the clamping arm 9, with the slide rail 15 slidably disposed in the groove 16, so that the parting block 11 and the clamping arm 9 are slidably connected. This structure allows the parting block 11 to act directly on the workpiece, and the opening on the parting block 11 to act directly on the outer wall of the workpiece. The parting block 11 will slide according to the clamping force, increasing the clamping points of the workpiece and improving the stability of the clamping.

[0027] Preferably, in the above structure, the parting block 11 has at least two openings on the side away from the clamping arm 9, and the openings are arc-shaped. Each opening contains an arc-shaped parting block A12. A T-shaped slide rail 15 is provided on the arc-shaped sidewall of the parting block A12. A matching T-shaped slide groove 16 is provided in the opening of the parting block 11. The slide rail 15 is slidably disposed in the slide groove 16 so that the parting block A12 and the parting block 11 are slidably connected. The parting block A12 has an opening on the side away from the parting block 11. Those skilled in the art will understand that, in order to increase the clamping points, this structure is further preferably provided with at least two openings on the side of the parting block 11 away from the clamping arm 9, and the openings are of an arc shape. Similarly, the arc shape here is also an arc-shaped structure in the shape of an arrow. Further preferably, an arc-shaped parting block A12 is provided in each opening, and a T-shaped slide rail 15 is provided on the arc-shaped sidewall of the parting block A12. A matching T-shaped slide groove 16 is provided in the opening of the parting block 11. The slide rail 15 is slidably disposed in the slide groove 16 so that the parting block A12 and the parting block 11 are slidably connected. The parting block A12 is provided with an opening on the side away from the parting block 11. With this structure, both the parting block A12 and the parting block 11 will slide during clamping, further increasing the clamping points and meeting the clamping needs of irregularly shaped workpieces.

[0028] Preferably, in the above structure, the parting block A12 has at least two openings on the side away from the parting block 11, and the openings are arc-shaped. An arc-shaped parting block B13 is provided in the opening, and a T-shaped slide rail 15 is provided on the arc-shaped sidewall of the parting block B13. A matching T-shaped slide groove 16 is provided in the opening of the parting block A12. The slide rail 15 is slidably disposed in the slide groove 16 so that the parting block B13 and the parting block A12 are slidably connected, and the parting block B13 has an opening on the side away from the parting block A12. Those skilled in the art will understand that this structure further specifies that a parting block B13 is also slidably disposed within the opening of parting block A12. Preferably, at least two openings are spaced apart on the side of parting block A12 away from parting block 11, and the openings are of an arc shape. An arc-shaped parting block B13 is disposed within the opening, and a T-shaped slide rail 15 is disposed on the arc-shaped sidewall of parting block B13. A matching T-shaped groove 16 is disposed within the opening of parting block A12, and the slide rail 15 is slidably disposed within the groove 16 so that parting block B13 and parting block A12 are slidably connected. An opening is disposed on the side of parting block B13 away from parting block A12. With this structure, parting blocks B13, A12, and 11 will all slide during clamping, further increasing the clamping points and meeting the clamping needs of irregularly shaped workpieces.

[0029] Preferably, the above structure further includes a workpiece table 4, which is mounted on the frame 1 and located below the end of the clamping arm 9 away from the slider 7. The upper end of the workpiece table 4 is provided with guide grooves 41 spaced apart along the clamping direction, and the lower end of the clamping arm 9 is provided with a matching guide block, which is correspondingly engaged within the guide grooves 41. Those skilled in the art will understand that, to further limit the movement of the clamping arm 9 along the clamping direction, this structure is further preferably mounted on the frame 1. In practice, the upper surface of the workpiece table 4 can be kept in contact with the lower surface of the clamping arm 9 by the support column 5. Further preferably, the upper end of the workpiece table 4 is provided with guide grooves 41, which are arranged along the clamping direction of the two clamping arms 9. Simultaneously, a matching guide block is provided at the lower end of the clamping arm 9, and the guide block is correspondingly engaged within the guide grooves 41. This structural arrangement allows the movement of the clamping arm 9 on the workpiece table 4 to be parallel to the guide grooves of the worktable, achieving stable workpiece clamping and automatic centering of the workpiece clamping.

[0030] Preferably, the guide groove 41 in the above structure is a dovetail groove or a T-shaped groove. Those skilled in the art will understand that, in order to further ensure that the clamping arm 9 can only move along the clamping direction, the guide groove 41 is preferably a dovetail groove or a T-shaped groove; therefore, the guide block provided at the lower end of the clamping arm 9 is a dovetail-shaped or T-shaped block.

[0031] Preferably, the guiding component in the above structure includes a guide rod 17, which is mounted on the frame 1 and located on both sides of the slider 7. The clamping arm 9 has a strip-shaped limiting hole at its end near the hydraulic cylinder 2, the length of which is perpendicular to the axis of the hydraulic cylinder 2. The upper end of the guide rod 17 passes through the limiting hole. Those skilled in the art will understand that the guiding component of this structure mainly controls the movement direction of the clamping arms 9, that is, it keeps the two clamping arms 9 moving in the clamping direction. Therefore, a strip-shaped limiting hole is actually provided at the end of the clamping arm 9 near the hydraulic cylinder 2, the length of which is perpendicular to the axis of the hydraulic cylinder 2. The upper end of the guide rod 17 passes through the limiting hole, and the guide rod 17 is mounted on the frame 1 and located on both sides of the slider 7. This restricts the axial movement of the clamping arms 9, ensuring that the clamping arms 9 can only move along the clamping direction, thereby ensuring stable clamping and centering of the workpiece.

[0032] Preferably, in the above structure, the upper end of the frame 1 is provided with a slide groove arranged along the axial direction of the hydraulic cylinder 2, and the lower end of the slider 7 is slidably disposed in the slide groove. Those skilled in the art will understand that, in order to ensure that the slider 7 moves along the axial direction of the hydraulic cylinder 2, this structure preferably provides a slide groove on the frame 1, and the length direction of the slide groove is arranged along the axial direction of the hydraulic cylinder 2, and the lower end of the slider 7 is slidably disposed in the slide groove, so that the rod of the hydraulic cylinder 2 can directly push the slider 7 to move along its axial direction.

[0033] Preferably, in the above structure, the slider 7 has a cross-shaped cross section, and the connecting rod 8 has U-shaped openings at both ends. One end of the connecting rod 8 is inserted into the upper side of the horizontal plate of the slider 7 and hinged by a pin 10, while the other end is inserted into the clamping arm 9 and hinged by a pin 10. Those skilled in the art will understand that, for ease of installation and fixation, this structure preferably has a cross-shaped cross section for the slider 7, and U-shaped openings at both ends of the connecting rod 8. One end of the connecting rod 8 is inserted into the upper side of the horizontal plate of the slider 7 and hinged by a pin 10, while the other end is inserted into the clamping arm 9 and hinged by a pin 10, so that both ends of the connecting rod 8 are hinged to the slider 7 and the clamping arm 9 respectively, ensuring structural stability.

[0034] Preferably, in the above structure, the single-sided clamping arm 9 is hinged to the slider 7 via two parallel connecting rods 8. Those skilled in the art will understand that this structure preferably uses a single-sided clamping arm 9 hinged to the slider 7 via two connecting rods 8. This structural arrangement allows the single-sided clamping arm 9, the two connecting rods 8, and the slider 7 to form a four-bar linkage, ensuring the stability of the connection structure.

[0035] Working principle: When clamping the workpiece, the hydraulic cylinder 2 drives the slider 7 to slide forward axially. The slider 7 drives the connecting rods 8 connected to its two sides to swing. Since the connecting rods 8 and the clamping arms 9 form parallelogram mechanisms on both sides of the slider 7, and the guide rod on the left side of the frame 1 passes through the limiting hole at the left end of the clamping arm 9, the rightward movement of the clamping arm 9 is restricted, so that the clamping arm 9 can only move in the clamping direction. Furthermore, since the parting block 11 and the clamping arm 9, the parting block A12 and the parting block 11, and the parting block B13 and the parting block A12 are all connected by T-shaped arc grooves and T-shaped arc rails, when the parting block B13 encounters the workpiece, the movement of each parting block 11, parting block B13, and parting block A12 follows the law of least resistance. The movements of each other are coordinated, completing the wrapping of the irregular workpiece in the clamping direction, and thus completing the clamping of the irregular workpiece.

Claims

1. A hydraulically driven parting fixture, characterized in that: The device includes a frame (1), a hydraulic cylinder (2), a slider (7), a connecting rod (8), a clamping arm (9), and a guide assembly. The cylinder body of the hydraulic cylinder (2) is fixed to one end of the frame (1), and the rod body is connected to one end of the slider (7). The slider (7) is slidably mounted on the frame (1). The clamping arm (9) is mounted on both sides of the slider (7). The clamping arm (9) is hinged to the slider (7) through the connecting rod (8). The guide assembly allows the two clamping arms (9) to move only along the clamping direction. The inner side of the clamping arm (9) away from the hinge end is provided with an arc-shaped opening. A parting block (11) that can slide along the arc-shaped sidewall is provided in the opening. The parting block (11) is provided with an opening on the side away from the clamping arm (9).

2. The hydraulically driven parting fixture as described in claim 1, characterized in that: The parting block (11) has an arc-shaped structure and a T-shaped slide rail (15) is provided on the outer arc-shaped sidewall. A matching T-shaped slide groove (16) is provided in the opening of the clamping arm (9). The slide rail (15) is slidably disposed in the slide groove (16) so that the parting block (11) and the clamping arm (9) are slidably connected.

3. The hydraulically driven parting fixture as described in claim 2, characterized in that: The parting block (11) has at least two openings on the side away from the clamping arm (9), and the openings are in an arc shape. Each opening contains an arc-shaped parting block A (12). A T-shaped slide rail (15) is provided on the arc-shaped sidewall of the parting block A (12). A matching T-shaped groove (16) is provided in the opening of the parting block (11). The slide rail (15) is slidably disposed in the groove (16) so that the parting block A (12) and the parting block (11) are slidably connected. The parting block A (12) has an opening on the side away from the parting block (11).

4. The hydraulically driven parting fixture as described in claim 3, characterized in that: The parting block A (12) has at least two openings on the side away from the parting block (11), and the openings are in an arc shape. An arc-shaped parting block B (13) is provided in the opening. A T-shaped slide rail (15) is provided on the arc-shaped sidewall of the parting block B (13). A matching T-shaped groove (16) is provided in the opening of the parting block A (12). The slide rail (15) is slidably disposed in the groove (16) so that the parting block B (13) and the parting block A (12) are slidably connected. The parting block B (13) has an opening on the side away from the parting block A (12).

5. The hydraulically driven parting fixture as described in claim 1, characterized in that: It also includes a workpiece table (4), which is set on the frame (1) and located below the end of the clamping arm (9) away from the slider (7). The upper end of the workpiece table (4) is provided with guide grooves (41) at intervals along the clamping direction, and the lower end of the clamping arm (9) is provided with a matching guide block, and the guide block is correspondingly locked in the guide groove (41).

6. The hydraulically driven parting fixture as described in claim 5, characterized in that: The guide groove (41) is a dovetail groove or a T-shaped groove.

7. The hydraulically driven parting fixture as described in claim 1, characterized in that: The guide assembly includes a guide rod (17), which is mounted on the frame (1) and located on both sides of the slider (7). The clamping arm (9) has a strip-shaped limiting hole at the end near the hydraulic cylinder (2). The length direction of the limiting hole is perpendicular to the axis of the hydraulic cylinder (2), and the upper end of the guide rod (17) passes through the limiting hole.

8. The hydraulically driven parting fixture as described in claim 1, characterized in that: The upper end of the frame (1) is provided with a slide groove arranged along the axial direction of the hydraulic cylinder (2), and the lower end of the slider (7) is slidably disposed in the slide groove.

9. The hydraulically driven parting fixture as described in claim 8, characterized in that: The slider (7) has a cross-shaped cross section. The connecting rod (8) has U-shaped openings at both ends. One end of the connecting rod (8) is inserted into the horizontal plate on the upper side of the slider (7) and then hinged by a pin (10). The other end is inserted into the clamping arm (9) and then hinged by a pin (10).

10. The hydraulically driven parting fixture as described in claim 1, characterized in that: The single-sided clamping arm (9) is hinged to the slider (7) through two parallel connecting rods (8).

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