Pin hydraulic clamp

Abstract

The utility model provides a pin hydraulic clamp, and belongs to the technical field of hydraulic clamps. The hydraulic clamp solves the problem that a hydraulic clamp in the prior art cannot deal with workpieces in complex shapes. The clamp comprises a clamp body, a positioning pin, a piston body, a piston rod, a guide base and a driving shaft, the clamp body is integrally formed and comprises a flange plate and a hydraulic cylinder body, the flange plate is located on one side of the hydraulic cylinder body, a pin hole is formed in the center of the flange plate, and a hydraulic connector is formed in the end face of the upper side of the hydraulic cylinder body. Mounting holes are formed in the end faces of the two sides of the hydraulic cylinder body, the first base penetrates through the mounting holes and is fixedly connected with the clamp body, the two ends of the piston rod are connected with the first base and the second base respectively, a mounting groove is formed in one side of the hydraulic cylinder body, the second base is mounted in the mounting groove, and the positioning pin is connected with the first base and extends into the pin hole. The clamping device has the advantages of high-degree-of-freedom clamping, convenience in disassembly and stable structure.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic clamping technology and relates to a pin hydraulic clamp. Background Technology

[0002] A pin hydraulic clamp is a mechanical tooling device that uses a hydraulic system as a power source to achieve precise positioning, clamping, or loosening of pins through hydraulic transmission. Due to the high efficiency and stability of hydraulic transmission, it occupies an important position in high-precision and automated production.

[0003] Chinese patent publication number CN205733985U discloses a hydraulic clamp, including a clamp base plate, a first clamping bar, and a second clamping bar. A cylinder body is fixedly installed at the bottom of the clamp base plate, and a piston is installed inside the cylinder body. The piston is fixedly connected to a piston rod. The first clamping bar is fixedly installed on the upper part of the clamp base plate, and the second clamping bar is movably sleeved on the outside of the first clamping bar. A clamping hole for clamping the middle part of the workpiece is formed between the first clamping bar and the second clamping bar. The clamp base plate is provided with a clearance hole adapted to the second clamping bar. The bottom end of the second clamping bar passes through the clearance hole and is fixedly connected to the piston rod.

[0004] In the hydraulic clamp provided by this patent, the pressure bar only clamps the middle part, which cannot restrict the axial, radial or rotational degrees of freedom of the workpiece. It is only suitable for clamping the middle part of cylindrical workpieces and cannot provide sufficient positioning constraints for workpieces with complex shapes or workpieces that require multi-dimensional positioning. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a pin hydraulic clamp.

[0006] The objective of this utility model can be achieved through the following technical solution: A pin-driven hydraulic clamp includes a clamp body, a positioning pin, a piston body, a piston rod, a guide base, and a drive shaft. The clamp body is integrally formed and includes a flange and a hydraulic cylinder. The flange is located on one side of the hydraulic cylinder and has a pin hole in its center. The upper end face of the hydraulic cylinder has a hydraulic interface, and the two end faces of the hydraulic cylinder have mounting holes. The guide base includes a first base and a second base. The first base passes through the mounting hole and is fixedly connected to the clamp body. There are two piston rods, and both ends of the piston rods are connected to the first base and the second base, respectively. A piston hole is opened inside the hydraulic cylinder and the piston rod passes through the piston hole. An installation groove is formed on one side of the hydraulic cylinder and the second base is installed in the installation groove. The positioning pin is connected to the first base and extends into the pin hole.

[0007] In the aforementioned pin hydraulic clamp, the piston body is fixedly connected to the second base, and the piston body and the second base are respectively provided with a first sealing groove and a second sealing groove, and sealing rings are installed in the first sealing groove and the second sealing groove.

[0008] In the aforementioned pin hydraulic clamp, a connecting hole is provided at the center of the second base, the drive shaft passes through the connecting hole and is connected to the piston body, and the sealing ring is sleeved on the outside of the drive shaft.

[0009] In the aforementioned pin-driven hydraulic clamp, a mounting pin is fixedly connected to the upper end face of the piston body, and the mounting pin is fixedly connected to the hydraulic cylinder body.

[0010] In one of the aforementioned pin-driven hydraulic clamps, a locating ring is formed on one side of the flange.

[0011] Compared with the prior art, the pin hydraulic clamp provided by this utility model has the following advantages: 1. By cooperating with the positioning pin through the pin hole in the center of the flange, it can be directly inserted into the positioning hole of the workpiece to achieve hole positioning. Combined with the radial constraint of the positioning ring, it completes the positioning and has high freedom; 2. The clamp body adopts an integrated molding process, eliminating the assembly error and loosening risk of traditional assembly structure. The piston body is rigidly connected to the hydraulic cylinder body through the mounting pin. The two ends of the piston rod are fixed to the first base and the second base respectively, forming a closed force transmission path; 3. The positioning pin and the first base are detachably connected, and positioning pins of different specifications can be quickly replaced according to the workpiece type. The second base is fixed to the hydraulic cylinder body through the mounting groove, which facilitates the adjustment of the relative position of the drive shaft and the piston body to adapt to the positioning requirements of workpieces of different heights. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the main structure of the fixture.

[0015] In the diagram: 1. Fixture body; 11. Flange; 12. Hydraulic cylinder body; 13. Pin hole; 14. Hydraulic interface; 15. Mounting hole; 16. Piston hole; 17. Mounting groove; 18. Positioning ring; 2. Positioning pin; 3. Piston body; 31. First sealing groove; 32. Mounting pin; 4. Piston rod; 5. Guide base; 51. First base; 52. Second base; 521. Second sealing groove; 522. Connecting hole; 6. Drive shaft; 7. Sealing ring. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 3 As shown, this embodiment includes a clamp body 1, which is integrally formed by a flange 11 and a hydraulic cylinder 12 and forms a complete hydraulic drive cavity inside. The flange 11 is located on one side of the hydraulic cylinder 12 and has a pin hole 13 in its center for the extension and retraction of the positioning pin 2. The upper end face of the hydraulic cylinder 12 has a hydraulic interface 14 for connecting to an external hydraulic pipeline, and the two end faces have mounting holes 15 for fixed connection with the guide base 5.

[0018] like Figures 1 to 3 As shown, the guide base 5 includes a first base 51 and a second base 52. The first base 51 passes through the mounting hole 15 and is fastened to the fixture body 1 by bolts. There are two piston rods 4, and their two ends are rigidly connected to the first base 51 and the second base 52 respectively to form a stable support frame. The hydraulic cylinder body 12 has a piston hole 16 inside, and the piston rod 4 passes through the piston hole 16 to ensure the straightness of the movement. A mounting groove 17 is formed on one side of the hydraulic cylinder body 12. The second base 52 is fixed in the mounting groove 17 by bolts to ensure assembly accuracy. The positioning pin 2 is connected to the first base 51 through a quick-change structure and extends into the pin hole 13 to achieve precise positioning of the workpiece.

[0019] To elaborate further, such as Figures 1 to 3 As shown, the piston body 3 and the second base 52 are fixedly connected by bolts. The piston body 3 and the second base 52 are respectively provided with a first sealing groove 31 and a second sealing groove 521. The sealing ring 7 is installed in the first sealing groove 31 and the second sealing groove 521 to form a double sealing structure to prevent hydraulic oil leakage. The second base 52 is provided with a connecting hole 522 in the center. The drive shaft 6 passes through the connecting hole 522 and is connected to the piston body 3. The sealing ring 7 is sleeved on the outside of the drive shaft 6 to ensure dynamic sealing performance.

[0020] To elaborate further, such as Figure 2 As shown, a mounting pin 32 is fixedly connected to the upper end face of the piston body 3. The mounting pin 32 cooperates with the positioning hole on the inner wall of the hydraulic cylinder body 12 to achieve radial positioning of the piston body 3 and prevent displacement during operation. A positioning ring 18 is formed on one side of the flange 11. The outer diameter of the positioning ring 18 is precisely matched with the inner diameter of the workpiece positioning hole to provide auxiliary positioning function and improve the overall positioning accuracy.

[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A pin-driven hydraulic clamp, comprising a clamp body (1), a positioning pin (2), a piston body (3), a piston rod (4), a guide base (5), and a drive shaft (6), characterized in that: The clamp body (1) is integrally formed and includes a flange (11) and a hydraulic cylinder (12). The flange (11) is located on one side of the hydraulic cylinder (12) and a pin hole (13) is provided in the center of the flange (11). A hydraulic interface (14) is provided on the upper end face of the hydraulic cylinder (12). Mounting holes (15) are provided on both end faces of the hydraulic cylinder (12). The guide base (5) includes a first base (51) and a second base (52). The first base (51) passes through the mounting hole. (15) and fixedly connected to the fixture body (1), the number of piston rods (4) is two and the two ends of the piston rods (4) are respectively connected to the first base (51) and the second base (52), the hydraulic cylinder body (12) has a piston hole (16) inside and the piston rod (4) passes through the piston hole (16), the hydraulic cylinder body (12) has an installation groove (17) on one side and the second base (52) is installed in the installation groove (17), the positioning pin (2) is connected to the first base (51) and extends into the pin hole (13).

2. The pin hydraulic clamp according to claim 1, characterized in that: The piston body (3) is fixedly connected to the second base (52). The piston body (3) and the second base (52) are respectively provided with a first sealing groove (31) and a second sealing groove (521). A sealing ring (7) is installed in the first sealing groove (31) and the second sealing groove (521).

3. A pin hydraulic clamp according to claim 2, characterized in that: The second base (52) has a connecting hole (522) at its center. The drive shaft (6) passes through the connecting hole (522) and is connected to the piston body (3). The sealing ring (7) is sleeved on the outside of the drive shaft (6).

4. A pin hydraulic clamp according to claim 1, characterized in that: The piston body (3) is fixedly connected to the upper end face with a mounting pin (32), and the mounting pin (32) is fixedly connected to the hydraulic cylinder body (12).

5. A pin hydraulic clamp according to claim 1, characterized in that: A positioning ring (18) is formed on one side of the flange (11).

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