Oil pressure double-sided spindle chuck seat

Abstract

This utility model discloses a hydraulic double-sided spindle clamp, relating to the technical field of spindle clamps. The utility model includes a base; a cylinder body fixedly mounted on the base, the cylinder body having two oil inlet holes, A and B; a main body coaxially disposed inside the cylinder body; a fixing ring fixedly sleeved on the outer circumference of the main body and relatively fixed to the cylinder body; and a left piston and a right piston axially slidably disposed in a cavity formed inside the main body. In this utility model, one oil path acts on the left cavity of the left piston, pushing it to the left to compress the rubber collet; another oil path acts on the left cavity of the right piston, pushing it to the left, causing the hard claw to retract via a guide block and a slider. Conversely, when pressurized oil enters from hole B, the oil path reverses, pushing the left and right pistons to the right to reset, thereby simultaneously releasing the rubber collets and hard claws on both sides, ensuring the synchronicity and reliability of the clamping and releasing actions.

Description

Technical Field

[0001] This utility model relates to the field of spindle clamp technology, specifically to a hydraulic double-sided spindle clamp. Background Technology

[0002] In the field of machining, especially in the application of double-sided lathes, the spindle chuck is a key functional component used for positioning and clamping workpieces. Its performance directly affects machining accuracy, efficiency, and the level of automation.

[0003] Many traditional spindles rely on manual or pneumatic clamping methods, making it difficult to achieve precise and controllable automatic clamping and releasing functions integrated with CNC systems. This fails to meet the demands of modern, efficient, and automated production lines, resulting in insufficient adaptability. Existing fixtures typically have a small radial shrinkage range. For irregularly shaped workpieces with a "large middle, small ends" structure, the larger central dimension cannot pass smoothly through the fixture's inner hole, preventing simultaneous machining of both ends and significantly limiting the machine tool's machining range. Some designs using a single hydraulic cylinder to simultaneously drive the clamping elements at both ends are prone to causing unnecessary axial movement or shifting of the workpiece during operation.

[0004] Therefore, a hydraulic double-sided spindle clamp is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic double-sided spindle clamp in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A hydraulic double-sided spindle clamp includes a base; a cylinder body fixedly mounted on the base, the cylinder body having two oil inlet holes A and B; a main body coaxially disposed inside the cylinder body; a retaining ring fixedly sleeved on the outer periphery of the main body and relatively fixed to the cylinder body; a left piston and a right piston axially slidably disposed in a cavity formed inside the main body; a rubber collet disposed at the left end of the main body and engaging with the left conical portion of the left piston; a right cylinder body connected to the right end of the main body; a right main body disposed inside the right cylinder body; a guide block, the left end of which is fixedly connected to the right end of the right piston; a slider engaging with the right end of the guide block via an inclined plane or T-block structure; and a hard claw mounted on the slider.

[0007] Furthermore, the body is internally machined with branched oil passages that direct oil from the fixed ring to the left side cavity of the left piston and the left side cavity of the right piston, respectively.

[0008] Furthermore, the guide block and the slider are connected by a T-shaped block, the head of the T-shaped block is slidably engaged with the guide block, and its tail is fixedly connected to the slider, thereby converting the axial movement of the guide block into the radial movement of the slider.

[0009] Furthermore, the right cylinder body is provided with a guide structure for restricting the axial movement of the slider and allowing it to move radially.

[0010] Furthermore, it also includes a left sealing cover and a right sealing cover, the left sealing cover being encapsulated at the left end of the body and the right sealing cover being encapsulated at the right end of the right cylinder body, for sealing the internal hydraulic oil.

[0011] Furthermore, a pulley is fitted onto the main body and a belt cover is fitted over it.

[0012] Furthermore, a sliding sleeve is fitted onto the right piston; a nut is threaded onto the end of the body.

[0013] The beneficial effects of this utility model are as follows: When pressurized oil enters through port A, the oil flows through the branched oil passages inside the fixed ring and the body, and is simultaneously delivered to two points of action. One path acts on the left chamber of the left piston, pushing it to the left to compress the rubber collet; the other path acts on the left chamber of the right piston, pushing it to the left, causing the hard claw to retract through the guide block and slider. Conversely, when pressurized oil enters through port B, the oil passages reverse, pushing the left and right pistons to the right to reset, thereby causing the rubber collets and hard claws on both sides to release simultaneously, ensuring the synchronicity and reliability of the clamping and releasing actions. Attached Figure Description

[0014] Figure 1 This is a sectional view of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a bottom view of the present invention; Reference numerals in the attached diagram: 1. Base; 2. Cylinder; 3. Body; 4. Retaining ring; 5. Pulley; 6. Left piston; 7. Right piston; 8. Sliding sleeve; 9. Nut; 10. Left sealing cover; 11. Right sealing cover; 12. Right body; 13. Right cylinder; 14. Guide block; 15. Slider; 16. T-block; 17. Hard claw; 18. Belt cover; 19. Rubber collet. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figures 1 to 3 As shown, a hydraulic double-sided spindle clamp includes a base 1; a cylinder 2, fixedly mounted on the base 1, with two oil inlet holes A and B on the cylinder 2; a body 3, coaxially disposed inside the cylinder 2; a fixing ring 4, fixedly sleeved on the outer periphery of the body 3 and relatively fixed to the cylinder 2; a left piston 6 and a right piston 7, axially slidably disposed in a cavity formed inside the body 3; a rubber collet 19, disposed at the left end of the body 3, engaging with the left conical part of the left piston 6; a right cylinder 13, connected to the right end of the body 3; a right body 12, disposed inside the right cylinder 13; a guide block 14, the left end of which is fixedly connected to the right end of the right piston 7; a slider 15, engaging with the right end of the guide block 14 via a ramp or T-block 16 structure; and a hard claw 17, mounted on the slider 15.

[0020] The body 3 has internally machined branched oil passages that direct oil from the fixed ring 4 to the left side cavity of the left piston 6 and the left side cavity of the right piston 7, respectively.

[0021] More specifically, the body 3 has precisely machined branched oil circuits inside. The oil circuit system diverts the single-path hydraulic oil from the fixed ring 4 to the left drive chamber of the left piston 6 and the left drive chamber of the right piston 7 without interference. The oil circuits integrated inside the body 3 constitute the core channel of the entire hydraulic servo system, ensuring that the pressure oil can reach the two drive positions simultaneously and equivalently.

[0022] The guide block 14 and the slider 15 are connected by a T-block 16. The head of the T-block 16 is slidably engaged with the guide block 14, and its tail is fixedly connected to the slider 15, converting the axial movement of the guide block 14 into the radial movement of the slider 15.

[0023] More specifically, when the right piston 7 produces axial linear motion, the guide block 14 fixed to it moves accordingly. The T-block 16, as a key component for motion conversion, has its head slidingly engaged with the guide block 14 and its tail fixed to the slider 15. Therefore, the axial motion of the guide block 14 is forcibly converted into the radial motion of the tail of the T-block 16, thereby driving the slider 15 and the hard claw 17 mounted on it to precisely contract or open radially, realizing large-stroke clamping and release.

[0024] The right cylinder 13 has a guide structure inside to restrict the axial movement of the slider 15 and allow it to move radially.

[0025] More specifically, to ensure that the slider 15 can only move radially and avoid axial movement, a guide structure is set inside the right cylinder 13 to constrain the motion degree of freedom of the slider 15, thus restricting its axial movement. When the guide block 14 drives the T-block 16 to move axially, the axial force of the T-block 16 is effectively decomposed because the axial degree of freedom of the slider 15 is restricted by the right cylinder 13, pushing the slider 15 to slide radially stably along the guide structure, thus ensuring the accuracy and reliability of the clamping action of the hard claw 17.

[0026] It also includes a left sealing cover 10 and a right sealing cover 11. The left sealing cover 10 is encapsulated at the left end of the body 3, and the right sealing cover 11 is encapsulated at the right end of the right cylinder 13, for sealing the internal hydraulic oil.

[0027] More specifically, the left sealing cover 10 and the right sealing cover 11 are respectively encapsulated at the left end of the main body 3 and the right end of the right cylinder 13, which can provide dynamic and static seals to prevent high-pressure hydraulic oil from leaking from the gap between the moving parts and the stationary parts.

[0028] The pulley 5 is fitted onto the main body 3 and the belt cover 18 is installed on the outside of it.

[0029] More specifically, the pulley 5 serves as a power input interface and is connected to an external motor via a belt. The power of the motor is transmitted to the pulley 5 via the belt, thereby driving the entire spindle system to rotate at high speed. The belt cover 18 is installed on the outside of the pulley 5 and the transmission belt, effectively preventing accidental contact between the operator and the transmission components during high-speed rotation.

[0030] The sliding sleeve 8 is fitted onto the right piston 7; the nut 9 is threaded onto the end of the body 3.

[0031] More specifically, the sliding sleeve 8 is fitted onto the right piston 7, forming a precise sliding fit with the piston to ensure the straightness and stability of the piston's axial movement under high-speed and high-pressure conditions, and to reduce uneven wear. The nut 9 is threaded onto the end of the body 3 to press the sliding sleeve 8, preventing it from loosening due to vibration during operation.

[0032] In summary: When pressurized oil enters from port A, after flowing through the branched oil passages inside the fixed ring 4 and the body 3, the oil is simultaneously delivered to two points of action. One path acts on the left chamber of the left piston 6, pushing it to the left to compress the rubber collet 19, while the other path acts on the left chamber of the right piston 7, pushing it to the left. Through the guide block 14 and the slider 15 mechanism, the hard claw 17 retracts inward. Conversely, when pressurized oil enters from port B, the oil passages reverse, pushing the left piston 6 and the right piston 7 to the right to reset, thereby causing the rubber collets 19 and the hard claw 17 on both sides to release simultaneously, ensuring the synchronicity and reliability of the clamping and releasing actions.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic double-sided spindle clamp, characterized in that, Including the base (1); The cylinder body (2) is fixedly installed on the base (1), and the cylinder body (2) is provided with two oil inlet holes, A and B; The main body (3) is coaxially disposed inside the cylinder (2); A fixing ring (4) is fixedly sleeved on the outer periphery of the body (3) and fixed relative to the cylinder (2); The left piston (6) and the right piston (7) are axially slidably disposed in the cavity formed inside the body (3); A rubber collet (19) is disposed at the left end of the body (3) and engages with the left cone portion of the left piston (6); The right cylinder (13) is connected to the right end of the main body (3); The right body (12) is disposed inside the right cylinder (13); The guide block (14) is fixedly connected at its left end to the right end of the right piston (7); The slider (15) is in transmission cooperation with the right end of the guide block (14) through a inclined plane or T-block (16) structure; Hard claw (17) is mounted on the slider (15).

2. The hydraulic double-sided spindle clamp according to claim 1, characterized in that, The body (3) is internally machined with branched oil passages that direct oil from the fixed ring (4) to the left side cavity of the left piston (6) and the left side cavity of the right piston (7).

3. The hydraulic double-sided spindle clamp according to claim 1, characterized in that, The guide block (14) and the slider (15) are connected by a T-block (16). The head of the T-block (16) is slidably engaged with the guide block (14), and its tail is fixedly connected to the slider (15), thereby converting the axial movement of the guide block (14) into the radial movement of the slider (15).

4. A hydraulic double-sided spindle clamp according to claim 1, characterized in that, The right cylinder (13) is provided with a guide structure inside to restrict the axial movement of the slider (15) and allow it to move radially.

5. A hydraulic double-sided spindle clamp according to claim 1, characterized in that, It also includes a left sealing cap (10) and a right sealing cap (11), the left sealing cap (10) being encapsulated at the left end of the body (3) and the right sealing cap (11) being encapsulated at the right end of the right cylinder (13) for sealing the internal hydraulic oil.

6. A hydraulic double-sided spindle clamp according to claim 1, characterized in that, A pulley (5) fitted on the main body (3) and a belt cover (18) covering it.

7. A hydraulic double-sided spindle clamp according to claim 1, characterized in that, The sliding sleeve (8) is fitted onto the right piston (7); the nut (9) is threaded onto the end of the body (3).

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