Special fixture for drilling and milling hole in oil cylinder

Abstract

The utility model provides a special fixture for drilling and milling a hole with a built-in oil cylinder, and belongs to the technical field of oil cylinder fixtures. The problem that in the prior art, the special-shaped positioning capacity of shaft type outer circle drilling is insufficient is solved. The clamp comprises a clamp body, a conical block, an oil cylinder cavity and a sealing plate, the clamp body is of a T-shaped cylindrical structure, a conical cavity and an installation cavity are formed in the clamp body and communicated with each other, the conical block is installed in the conical cavity, a matching ring body is formed at one end of the conical block, and a piston push rod is formed on one side of the oil cylinder cavity. The piston push rod extends into the matching ring body to enable the oil cylinder cavity to be connected with the conical block, an oil cavity is formed in one end of the oil cylinder cavity, a sealing ring is formed on the outer side of the oil cavity, a connecting shaft is formed in the center of one side of the sealing plate, a sealing groove is formed in the connecting shaft, the connecting shaft extends into the oil cavity, and the sealing ring is connected with the sealing groove in an attached mode. The buffer device has the advantages of being high in adaptability, good in buffer performance and convenient to disassemble.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic cylinder clamping technology, and relates to a special clamping fixture for drilling and milling holes built into a hydraulic cylinder. Background Technology

[0002] The built-in hydraulic cylinder fixture, through the precise drive of the built-in hydraulic cylinder and the high-precision adaptation of the special positioning structure, combined with multi-station and automated design, solves the problems of precision control, efficiency improvement and batch processing when drilling and milling shaft parts. It is a key tooling in the field of precision machining, and is especially suitable for the production of shaft parts with high requirements for hole position accuracy and surface quality.

[0003] Chinese patent publication number CN203304604U discloses a special clamp for hydraulic cylinders, including an expansion sleeve, a retaining ring, a top ring, a thrust ball bearing, a conical body, a tool holder, a locking screw, and a round nut. The tool holder and the conical body are welded together. The conical body is located inside the expansion sleeve. The retaining ring is located on the outer side of one end of the expansion sleeve. The retaining ring and the top ring are fitted together at the connection between the conical body and the tool holder. The thrust ball bearing is located between the end of the expansion sleeve and the top ring. The retaining ring and the top ring are fixedly connected by the locking screw. Under the pressure of the retaining ring, the expansion sleeve and the top ring cooperate to press against the thrust ball bearing. The round nut is located on the outer side of the top ring and is welded to the top ring for fixation.

[0004] The hydraulic cylinder fixture provided by this patent lacks the ability to position irregularly shaped shafts, such as the stepped surface and keyway of the output shaft. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in the prior art by providing a special fixture for drilling and milling holes with a built-in hydraulic cylinder.

[0006] The objective of this utility model can be achieved through the following technical solution: A special fixture for drilling and milling holes with an internal hydraulic cylinder, comprising a fixture body, a conical block, a hydraulic cylinder cavity, and a sealing plate. The fixture body has a T-shaped cylindrical structure. The fixture body has a conical cavity and an installation cavity inside, and the conical cavity and the installation cavity are interconnected. The conical block is installed in the conical cavity. A mating ring is formed at one end of the conical block. A piston push rod is formed on one side of the hydraulic cylinder cavity. The piston push rod extends into the mating ring to connect the hydraulic cylinder cavity with the conical block. An oil cavity is formed at one end of the hydraulic cylinder cavity, and a sealing ring is formed on the outer side of the oil cavity. A connecting shaft is formed at the center of one side of the sealing plate. A sealing groove is formed in the connecting shaft. The connecting shaft extends into the oil cavity, and the sealing ring and the sealing groove are fitted together.

[0007] In the aforementioned special fixture for drilling and milling holes with a built-in hydraulic cylinder, a first buffer groove and a second buffer groove are provided on the outside of the hydraulic cylinder cavity.

[0008] In the aforementioned hydraulic cylinder-integrated drilling and milling fixture, a connecting flange is fixedly installed on the front side of the fixture body.

[0009] In the aforementioned special fixture for drilling and milling holes built into a hydraulic cylinder, a third buffer groove is provided between the sealing plate and the connecting shaft.

[0010] In the aforementioned special fixture for drilling and milling holes built into a hydraulic cylinder, a bolt groove is provided on the outer end face of the fixture body, and a connecting groove corresponding to the bolt groove is provided in the sealing plate.

[0011] Compared with the prior art, the special jig for drilling and milling holes built into the hydraulic cylinder provided by this utility model has the following beneficial effects: 1. By nesting and positioning the conical block and the piston push rod, it achieves full freedom constraints in the axial, radial, and circumferential directions, solving the complex positioning problem of drilling the outer circle of shafts, and is particularly suitable for machining radial holes and stepped holes of shaft parts such as output shafts and eccentric shafts; 2. Through the design of several buffer grooves, it buffers the pressure fluctuation of the hydraulic system, maintains the stability of the clamping force, effectively resists the axial movement of deep hole drilling, and ensures the straightness of the hole; 3. The conical block, sealing plate, and connecting flange adopt a quick-release structure with bolt grooves and connecting grooves, realizing quick disassembly and replacement, and adapting to different shaft specifications. 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 cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0015] In the diagram: 1. Fixture body; 11. Conical cavity; 12. Mounting cavity; 13. Bolt groove; 2. Conical block; 21. Mating ring; 3. Cylinder cavity; 31. Piston push rod; 32. Oil cavity; 33. Sealing ring; 34. First buffer groove; 35. Second buffer groove; 4. Sealing plate; 41. Connecting shaft; 42. Sealing groove; 43. Third buffer groove; 44. Connecting groove; 5. Connecting flange. 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 3As shown, this embodiment includes a fixture body 1, which has a T-shaped cylindrical structure. The fixture body 1 has a conical cavity 11 and a mounting cavity 12 that are interconnected inside. The conical cavity 11 is used to install the conical block 2, and the mounting cavity 12 provides assembly space for the cylinder cavity 3. A connecting flange 5 is fixedly installed on the front side of the fixture body 1 by bolts. The connecting flange 5 is used to connect with the machine tool table or other equipment to ensure the stability of the fixture during the processing.

[0018] like Figures 1 to 3 As shown, the conical block 2 is installed in the conical cavity 11. A mating ring 21 is formed at the rear end of the conical block 2. A piston push rod 31 extends from the front side of the cylinder cavity 3. The piston push rod 31 extends into the mating ring 21 and is rigidly connected to the conical block 2 to ensure that the linear motion of the cylinder cavity 3 can be accurately transmitted to the conical block 2. An oil cavity 32 is opened at one end of the cylinder cavity 3. A sealing ring 33 is formed on the outside of the oil cavity 32. The sealing plate 4 is rectangular in shape and a connecting shaft 41 is formed at the center of the front side of the sealing plate 4. A sealing groove 42 is opened in the connecting shaft 41. When the connecting shaft 41 extends into the oil cavity 32, the sealing ring 33 and the sealing groove 42 fit tightly together to form a sealing structure and prevent hydraulic oil leakage.

[0019] To elaborate further, such as Figures 1 to 3 As shown, the cylinder cavity 3 has a first buffer groove 34 and a second buffer groove 35 on the outside along the circumferential direction. These buffer grooves can store a small amount of hydraulic oil, which plays a buffering role when the cylinder moves quickly, reducing impact and vibration, and extending the service life of the clamp. A third buffer groove 43 is provided between the sealing plate 4 and the connecting shaft 41, which is also used to absorb the pressure fluctuations generated when the hydraulic system is working, and improve the stability of the system.

[0020] To elaborate further, such as Figures 1 to 3 As shown, a bolt groove 13 is provided in the outer end face of the fixture body 1, and a connecting groove 44 corresponding to the bolt groove 13 is provided in the sealing plate 4. By passing the bolt through the connecting groove 44 and screwing it into the bolt groove 13, the sealing plate 4 and the fixture body 1 can be fastened together, while ensuring the tight fit between the sealing ring 33 and the sealing groove 42. This design enables the fixture to maintain good sealing performance under high pressure working conditions, and it is easy to disassemble and assemble, and convenient to maintain and replace internal components.

[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 special jig for drilling and milling holes built into a hydraulic cylinder, comprising a jig body (1), a conical block (2), a hydraulic cylinder cavity (3), and a sealing plate (4), characterized in that: The clamp body (1) has a T-shaped cylindrical structure. The clamp body (1) has a conical cavity (11) and a mounting cavity (12) inside, and the conical cavity (11) and mounting cavity (12) are interconnected. The conical block (2) is installed in the conical cavity (11). One end of the conical block (2) forms a mating ring (21). A piston push rod (31) is formed on one side of the cylinder cavity (3), and the piston push rod (31) extends into the mating ring (21). 21) The cylinder cavity (3) is connected to the conical block (2) inside. One end of the cylinder cavity (3) is provided with an oil cavity (32) and a sealing ring (33) is formed on the outside of the oil cavity (32). A connecting shaft (41) is formed at the center of one side of the sealing plate (4). A sealing groove (42) is provided in the connecting shaft (41). The connecting shaft (41) extends into the oil cavity (32). The sealing ring (33) and the sealing groove (42) are fitted together.

2. The special fixture for drilling and milling holes built into a hydraulic cylinder according to claim 1, characterized in that: The cylinder cavity (3) is provided with a first buffer groove (34) and a second buffer groove (35) on the outside.

3. The special fixture for drilling and milling holes built into a hydraulic cylinder according to claim 1, characterized in that: A connecting flange (5) is fixedly installed on the front side of the fixture body (1).

4. A special fixture for drilling and milling holes built into a hydraulic cylinder according to claim 1, characterized in that: A third buffer groove (43) is provided between the sealing plate (4) and the connecting shaft (41).

5. A special fixture for drilling and milling holes built into a hydraulic cylinder according to claim 1, characterized in that: The clamp body (1) has a bolt groove (13) on its outer end face, and the sealing plate (4) has a connecting groove (44) corresponding to the bolt groove (13).

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