Ring type self-centering hydraulic clamp

Abstract

The utility model discloses a ring type self-centering hydraulic clamp, can one-time outer clamping type fixed workpiece of processing, and the center line of workpiece is positioned to the axle of clamp. Ring type self-centering hydraulic clamp, including clamp main part, product clamping seat and clamping seat fixed ring, product clamping seat is made of elastic material, clamp main part is provided with round hole, and the lateral wall of round hole is provided with annular mounting flange, product clamping seat, clamping seat fixed ring are respectively sealedly connected in the upper and lower surface of mounting flange, and the hydraulic oil cavity is formed between three, and product clamping seat is provided with the clamping hole for workpiece cooperation, clamp main part is provided with hydraulic channel, and a plurality of hydraulic oil inlet and outlet holes, bolt holes are communicated with hydraulic channel respectively, hydraulic channel is through to the ring wall of mounting flange to realize the intercommunication with hydraulic oil cavity, hydraulic oil inlet and outlet hole is used for connecting hydraulic oil supply equipment, and bolt hole is used for connecting adjusting bolt to realize the manual regulation of the hydraulic pressure in hydraulic oil cavity.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic clamping technology, and specifically refers to a ring-shaped self-centering hydraulic clamp. Background Technology

[0002] A hydraulic chuck is a clamping device used on machine tools (such as lathes, milling machines, and drilling machines). It utilizes a hydraulic system to clamp or release workpieces, providing a fast, efficient, and precise way to fix workpieces for machining. Hydraulic chucks are particularly suitable for applications requiring frequent workpiece changes because they can quickly clamp and release, reducing downtime and increasing production efficiency. The working principle of a hydraulic chuck is that a hydraulic pump generates pressure, which is transmitted to a piston inside the chuck. The piston pushes the jaws to move, thus clamping or releasing the workpiece. A chuck typically consists of multiple jaws that can rotate around a central point to accommodate workpieces of different sizes and shapes. Similar hydraulic clamps include hydraulic collets, which can respectively achieve external and internal clamping of workpieces.

[0003] Existing hydraulic clamps, especially hydraulic chucks for external workpiece clamping, lack self-centering capabilities. They rely solely on the machining accuracy of the jaws and linkages to ensure synchronized movement of each jaw under hydraulic pressure, aiming to position the clamped workpiece on the clamp's axis. However, such hydraulic clamps require multiple, repeated positioning and clamping operations during production, resulting in low production efficiency, high defect rates after mass production, and an inability to achieve high product qualification rates and output. They are particularly unsuitable for high-precision manufacturing applications. Utility Model Content

[0004] The main purpose of this utility model is to provide a ring-shaped self-centering hydraulic clamp to solve the problems existing in the prior art. It can fix the workpiece to be processed in a one-time external clamp and position the center line of the workpiece on the axis of the clamp. While ensuring high positioning accuracy, it can complete multi-face processing of the workpiece and improve production efficiency.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A ring-shaped self-centering hydraulic clamp includes a clamp body, a product clamping seat, and a clamping seat fixing ring. The product clamping seat is made of an elastic material. The clamp body has a circular hole, and the side wall of the circular hole has an annular mounting flange. The product clamping seat and the clamping seat fixing ring are respectively sealed to the upper and lower surfaces of the mounting flange, forming a hydraulic oil cavity. The product clamping seat has a clamping hole for workpiece mating. The clamp body has a hydraulic channel and a plurality of hydraulic oil inlet / outlet holes and bolt holes communicating with the hydraulic channel. The hydraulic channel extends through the annular wall of the mounting flange to communicate with the hydraulic oil cavity. The hydraulic oil inlet / outlet holes are used to connect a hydraulic oil supply device. The bolt holes are used to connect adjusting bolts to manually adjust the hydraulic pressure in the hydraulic oil cavity.

[0007] The inner diameter of the clamping seat fixing ring is smaller than the inner diameter of the mounting flange. The product clamping seat fits onto the upper surface of the clamping seat fixing ring, and the lower circumferential surface of the product clamping seat is threadedly connected to the clamping seat fixing ring. Sealing rings for end face sealing are provided between the product clamping seat and the mounting flange, between the product clamping seat and the clamping seat fixing ring, and between the clamping seat fixing ring and the mounting flange.

[0008] Preferably, the product clamping seat and the clamping seat fixing ring are both installed on the mounting flange by means of screws to achieve relative fixation.

[0009] The fixture body is provided with several connecting holes, which are used to fix the fixture body to the machine base with bolts.

[0010] Preferably, the connecting holes include four M6 and four M8 through holes.

[0011] The outer peripheral surface of the product clamping seat is recessed to form a groove, and the groove is covered by the mounting flange and the clamping seat fixing ring to form the hydraulic oil cavity.

[0012] Preferably, the bottom wall of the groove protrudes to form a step, and the upper and lower sides of the step are inclined surfaces.

[0013] The lower end of the annular wall of the clamping hole is provided with a protruding annular support flange for supporting the workpiece.

[0014] After adopting the above technical solution, the present invention has the following technical effects:

[0015] (1) The present invention uses elastic material to make the product clamping seat. After the clamping body, the product clamping seat and the clamping seat fixing ring are assembled, the three form a closed hydraulic oil chamber and have two usage modes: In the automatic state, the hydraulic oil supply equipment is used to input or draw out the high pressure hydraulic oil into the hydraulic oil chamber, so that the product clamping seat generates tension deformation to complete the clamping or loosening action of the workpiece; In the manual state, under the premise that the bolts in the other bolt holes are fixed or other parts are used to block them, the clamping and loosening action of the product clamping seat 2 can be manually switched by turning one of the adjusting bolts.

[0016] (2) This utility model mainly utilizes the tension deformation of the product clamping seat to clamp the workpiece. Since the hydraulic oil chamber formed at the circular hole is also circular, when the hydraulic pressure changes, it can be synchronously distributed to all parts of the circumference of the clamping hole of the product clamping seat to achieve synchronous deformation. In addition, it can automatically position the workpiece to the axis of the fixture without manual adjustment, which can meet the needs of high-precision processing. Attached Figure Description

[0017] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0018] Figure 2 This is an exploded view of a specific embodiment of the present utility model.

[0019] Figure 3 This is a cross-sectional view of a specific embodiment of the present utility model.

[0020] Explanation of icon numbers:

[0021] 1- Fixture body; 11- Round hole; 12- Mounting flange; 13- Hydraulic channel; 14- Hydraulic oil inlet / outlet; 15- Bolt hole; 16- Connection hole;

[0022] 2-Product clamping base; 21-Clamping hole; 22-Groove; 23-Step; 24-Bevel; 25-Support flange;

[0023] 3-Clamping seat retaining ring;

[0024] 4-Adjusting bolt;

[0025] 5-Sealing ring;

[0026] 10-Hydraulic oil chamber. Detailed Implementation

[0027] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0028] refer to Figure 1-3As shown, this utility model discloses a ring-shaped self-centering hydraulic clamp, including a clamp body 1, a product clamping seat 2 and a clamping seat fixing ring 3, wherein the product clamping seat 2 is made of elastic material;

[0029] The fixture body 1 is provided with a circular hole 11, and the side wall of the circular hole 11 is provided with an annular mounting flange 12; the product clamping seat 2 and the clamping seat fixing ring 3 are respectively sealed and connected to the upper and lower surfaces of the mounting flange 12, and the three together form a hydraulic oil cavity 10, and the product clamping seat 2 is provided with a clamping hole 21 for workpiece mating;

[0030] The fixture body 1 is provided with a hydraulic channel 13, and a number of hydraulic oil inlet and outlet holes 14 and bolt holes 15 respectively connected to the hydraulic channel 13; the hydraulic channel 13 extends through the annular wall of the mounting flange 12 to achieve communication with the hydraulic oil chamber 10; the hydraulic oil inlet and outlet holes 14 are used to connect hydraulic oil supply equipment, such as a standard hydraulic station; the bolt holes 15 are used to connect adjusting bolts 4 to achieve manual adjustment of the hydraulic pressure in the hydraulic oil chamber 10.

[0031] Through the above scheme, this utility model uses an elastic material to make the product clamping seat 2. After the fixture body 1, the product clamping seat 2, and the clamping seat fixing ring 3 are assembled, the three form a closed hydraulic oil chamber 10, which has two modes of use: In automatic mode, a hydraulic oil supply device is used to input or extract high-pressure hydraulic oil into or out of the hydraulic oil chamber 10, causing the product clamping seat 2 to undergo tension deformation to complete the clamping or releasing action of the workpiece; In manual mode, provided that the bolts in the other bolt holes 15 are fixed or blocked by other parts, the clamping and releasing actions of the product clamping seat 2 can be switched manually by turning one of the adjusting bolts 4. This utility model mainly uses the tension deformation of the product clamping seat 2 to clamp the workpiece. Since the hydraulic oil chamber 10 formed at the circular hole 11 is also circular, when the hydraulic pressure changes, it can be synchronously distributed to all parts of the circumference of the clamping hole 21 of the product clamping seat 2 to achieve synchronous deformation. In addition, it can automatically position the workpiece to the axis of the fixture without the need for multiple manual adjustments, which can meet the needs of high-precision processing.

[0032] The following are specific embodiments of the present invention.

[0033] The inner diameter of the aforementioned clamping seat fixing ring 3 is smaller than the inner diameter of the mounting flange 12. The product clamping seat 2 fits on the upper surface of the clamping seat fixing ring 3, and the lower circumferential surface of the product clamping seat 2 is threadedly connected to the clamping seat fixing ring 3. Sealing rings 5 ​​for end face sealing are provided between the product clamping seat 2 and the mounting flange 12, between the product clamping seat 2 and the clamping seat fixing ring 3, and between the clamping seat fixing ring 3 and the mounting flange 12. In this embodiment, the aforementioned product clamping seat 2 and clamping seat fixing ring 3 can be installed on the mounting flange 12 by screw locking to achieve relative fixation, and the sealing ring 5 is used to achieve the sealing of the hydraulic oil chamber 10. Thus, this utility model utilizes Pascal's law, abandons the welding sealing method of the prior art, and innovatively adopts mechanical connection of each component and cooperation with the sealing ring 5 to achieve sealing. By adjusting the hydraulic pressure through the hydraulic oil supply equipment or adjusting bolt 4, the force can be output to achieve clamping or releasing action of the workpiece.

[0034] The elastic material of the clamping seat 2 of the above-mentioned product can be rubber or the like, which can produce a certain deformation when subjected to hydraulic pressure.

[0035] The fixture body 1 is provided with several connecting holes 16, which are used to fix the fixture body 1 on the machine base with bolts.

[0036] Furthermore, the aforementioned connection hole 16 includes four M6 and four M8 through holes, providing greater installation flexibility.

[0037] The outer peripheral surface of the product clamping seat 2 is recessed to form a groove 22. After the groove 22 is covered by the mounting flange 12 and the clamping seat fixing ring 3, it forms the hydraulic oil cavity 10.

[0038] Furthermore, the bottom wall of the aforementioned groove 22 protrudes to form a step 23, and the upper and lower sides of the step 23 are inclined surfaces 24. Thus, when the hydraulic pressure in the hydraulic oil chamber 10 changes, the pressure acts on the step 23 from the upper and lower sides, causing the annular wall of the clamping hole 21 corresponding to the step 23 to be subjected to a greater force and to contract radially, providing a greater clamping force.

[0039] The lower end of the annular wall of the clamping hole 21 is provided with a protruding annular support flange 25 for supporting the workpiece.

[0040] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A ring-shaped self-centering hydraulic clamp, characterized in that: It includes a clamp body, a product clamping seat, and a clamping seat fixing ring, wherein the product clamping seat is made of an elastic material; The fixture body is provided with a circular hole, and the side wall of the circular hole is provided with an annular mounting flange; the product clamping seat and the clamping seat fixing ring are respectively sealed to the upper and lower surfaces of the mounting flange, and the three together form a hydraulic oil cavity, and the product clamping seat is provided with a clamping hole for the workpiece to cooperate with. The fixture body is provided with a hydraulic channel, and a plurality of hydraulic oil inlet and outlet holes and bolt holes respectively communicating with the hydraulic channel; the hydraulic channel extends through the annular wall of the mounting flange to achieve communication with the hydraulic oil chamber; the hydraulic oil inlet and outlet holes are used to connect to a hydraulic oil supply device; the bolt holes are used to connect adjusting bolts to achieve manual adjustment of the hydraulic pressure in the hydraulic oil chamber.

2. The ring-shaped self-centering hydraulic clamp as described in claim 1, characterized in that: The inner diameter of the clamping seat fixing ring is smaller than the inner diameter of the mounting flange. The product clamping seat fits onto the upper surface of the clamping seat fixing ring, and the lower circumferential surface of the product clamping seat is threadedly connected to the clamping seat fixing ring. Sealing rings for end face sealing are provided between the product clamping seat and the mounting flange, between the product clamping seat and the clamping seat fixing ring, and between the clamping seat fixing ring and the mounting flange.

3. The ring-shaped self-centering hydraulic clamp as described in claim 2, characterized in that: The product clamping seat and clamping seat fixing ring are both installed on the mounting flange by screw locking to achieve relative fixation.

4. The ring-shaped self-centering hydraulic clamp as described in claim 1, characterized in that: The fixture body is provided with several connecting holes, which are used to fix the fixture body to the machine base with bolts.

5. The ring-shaped self-centering hydraulic clamp as described in claim 4, characterized in that: The connection holes include four M6 and four M8 through holes.

6. The ring-shaped self-centering hydraulic clamp as described in claim 1, characterized in that: The outer peripheral surface of the product clamping seat is recessed to form a groove, and the groove is covered by the mounting flange and the clamping seat fixing ring to form the hydraulic oil cavity.

7. The ring-shaped self-centering hydraulic clamp as described in claim 6, characterized in that: The bottom wall of the groove protrudes to form a step, and the upper and lower sides of the step are inclined surfaces.

8. The ring-shaped self-centering hydraulic clamp as described in claim 1, characterized in that: The lower end of the annular wall of the clamping hole is provided with a protruding annular support flange for supporting the workpiece.

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