Hydraulic clamping device for piston rod machining

Abstract

The utility model provides a hydraulic clamping device for piston rod machining, and relates to the field of piston rod machining. Comprising a base, a fixing column is fixedly connected to the upper surface of the base, a fixing block is fixedly connected to the upper end of the fixing column, a rotating groove is formed in the inner side of the fixing block, a fixing plate is fixedly connected to the interior of the rotating groove, and a hydraulic oil cylinder is fixedly connected to the interior of the rotating groove. According to the hydraulic clamping device, the fixing block, the rotating groove, the fixing plate, the hydraulic oil cylinder, a telescopic rod, a worm, a worm gear, a rotating block, a first sliding groove, a limiting column and a clamping block are used in cooperation, the worm gear drives the rotating block to rotate, the first sliding groove in the rotating block pushes the limiting column, and the limiting column drives the clamping block to do radial linear motion along a second sliding groove in the fixing block; and the movement distance of the clamping block can be accurately adjusted by controlling the expansion and contraction amount of the hydraulic oil cylinder, so that the piston rod clamping device adapts to piston rod bodies with different diameters, the clamping force is kept stable, and the piston rods with different diameters are clamped.

Description

Technical Field

[0001] This utility model relates to a clamping device, specifically a hydraulic clamping device for piston rod processing, belonging to the field of piston rod processing technology. Background Technology

[0002] The piston rod is the connecting component that supports the piston in performing work. It is mostly used in the moving parts of hydraulic cylinders and pneumatic cylinders, and is a moving component with frequent movement and high technical requirements. Taking a hydraulic cylinder as an example, it consists of several parts: cylinder barrel, piston rod (cylinder rod), piston, and end cap. The quality of its machining directly affects the lifespan and reliability of the entire product.

[0003] A search revealed Chinese Patent CN211249770U, which discloses a hydraulic clamping device for piston rod processing. The device includes a movable structure, a protective shell, an oil leakage prevention structure, and a clamping structure. The movable structure extends through one side of the protective shell, and a mounting structure is fixedly connected to the other side of the movable structure. This invention clamps the piston rod using the protective shell. The movable structure converts hydraulic energy into mechanical energy by allowing oil to flow in and out through a first and second oil inlet / outlet. The oil leakage prevention groove on the movable rod provides an oil leakage prevention effect. Its advantages include a simple structure and low cost.

[0004] While the above solutions can clamp the piston rod, the hydraulic clamping device in the aforementioned patent has difficulty clamping piston rods of different diameters. Gaps exist between small-diameter piston rods and protective pads, making the workpiece prone to loosening and displacement during processing, leading to loss of processing accuracy. Therefore, we provide a hydraulic clamping device for piston rod processing to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic clamping device for piston rod processing in order to solve the above-mentioned problems, thereby addressing the issue of clamping piston rods of different diameters in the prior art.

[0006] This utility model is achieved through the following technical solution: a hydraulic clamping device for piston rod processing, including a base, a fixed column fixedly connected to the upper surface of the base, a fixed block fixedly connected to the upper end of the fixed column, a rotating groove opened on the inner side of the fixed block, a fixed plate fixedly connected to the inside of the rotating groove, a hydraulic cylinder fixedly connected to the inside of the rotating groove, a telescopic rod slidably connected to the inner wall of the hydraulic cylinder, and a worm gear slidably connected to the outer surface of the telescopic rod.

[0007] The outer surface of the worm gear is engaged with a worm wheel, and a rotating block is fixedly connected to the inner side of the worm wheel. A first sliding groove is provided on one side of the rotating block, and a limiting post is slidably connected inside the first sliding groove. A clamping block is fixedly connected to one end of the limiting post.

[0008] Preferably, a fixing plate is fixedly connected inside the rotating groove. The inner wall of the fixing plate is rotatably connected to the outer surface of the worm. The fixing plate can fix the worm and prevent it from tilting during rotation, thus playing a fixing role.

[0009] Preferably, the worm gear passes through the fixed plate, and the end of the worm gear away from the fixed plate is rotatably connected to the inner wall of the fixed block. The other end of the worm gear is installed inside the fixed block, so that the worm gear can rotate when the hydraulic cylinder extends or retracts the telescopic rod.

[0010] Preferably, the outer surface of the rotating block is rotatably connected to the inside of the rotating groove, and the inner wall of the rotating block is rotatably connected to the inside of the fixed block. Under the action of the worm gear, the rotating block can rotate inside the rotating groove, which facilitates the clamping block to clamp the piston rod.

[0011] Preferably, a second sliding groove is provided on one side of the fixing block, and the inner wall of the second sliding groove is slidably connected to one side of the clamping block. The second sliding groove provided on the fixing block allows the clamping block to slide inside the second sliding groove.

[0012] Preferably, a fixing frame is fixedly connected to the upper surface of the base, a placement block is fixedly connected to one side of the fixing frame, and a piston rod body is slidably connected to the upper surface of the placement block. The placement block is installed on the fixing frame, and the piston rod can be supported by the placement block to prevent loosening during processing.

[0013] Preferably, the hydraulic cylinder has an oil inlet on one side and an oil outlet on the other side. The oil inlet and outlet on the hydraulic cylinder allow hydraulic oil to enter the hydraulic cylinder and push the telescopic rod to extend and retract.

[0014] This utility model provides a hydraulic clamping device for piston rod machining, which has the following beneficial effects:

[0015] 1. This hydraulic clamping device utilizes a combination of a fixed block, a rotating groove, a fixed plate, a hydraulic cylinder, a telescopic rod, a worm gear, a worm wheel, a rotating block, a first sliding groove, a limiting post, and a clamping block. The worm wheel drives the rotating block to rotate, causing the first sliding groove on the rotating block to push the limiting post. The limiting post then drives the clamping block to move radially along the second sliding groove on the fixed block. By controlling the extension and retraction of the hydraulic cylinder, the movement distance of the clamping block can be precisely adjusted to accommodate piston rods of different diameters and maintain a stable clamping force, thus enabling the clamping of piston rods of different diameters.

[0016] 2. This hydraulic clamping device uses the piston rod body, placement block, and fixed frame in cooperation. The fixed frame is rigidly connected to the base to provide a stable support platform for the placement block, preventing equipment vibration from being transmitted to the workpiece during processing. The planar support of the placement block offsets the radial cutting force, preventing the workpiece from axial movement or circumferential rotation during processing. During operation, the support position of the piston rod can be adjusted along the direction of the fixed frame, thus accommodating the processing needs of piston rods of different lengths. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model;

[0019] Figure 3 This is an exploded three-dimensional structural diagram of the left-side clamping device of this utility model;

[0020] Figure 4 This is an exploded three-dimensional structural diagram of the right-side clamping device of this utility model;

[0021] Figure 5 This is a three-dimensional cross-sectional structural diagram of the worm gear of this utility model.

[0022] [Explanation of Key Component Symbols]

[0023] 1. Base; 2. Fixed column; 3. Fixed block; 4. Rotating groove; 5. Fixed plate; 6. Hydraulic cylinder; 7. Telescopic rod; 8. Worm gear; 9. Worm wheel; 10. Rotating block; 11. First slide groove; 12. Limiting column; 13. Clamping block; 14. Second slide groove; 15. Piston rod body; 16. Placement block; 17. Fixed frame; 18. Oil inlet; 19. Oil outlet. Detailed Implementation

[0024] This utility model provides a hydraulic clamping device for piston rod machining.

[0025] Please see Figure 1 and Figure 2 The system includes a base 1, a fixing frame 17 fixedly connected to the upper surface of the base 1, a placement block 16 fixedly connected to one side of the fixing frame 17, and a piston rod body 15 slidably connected to the upper surface of the placement block 16. The fixing frame 17 is installed on the base 1, and the placement block 16 can be fixed by the fixing frames 17 on both sides. The placement block 16 can support the piston rod body 15 and prevent the piston rod body 15 from shaking during processing, thus playing a supporting role. A fixing column 2 is fixedly connected to the upper surface of the base 1, and a fixing block 3 is fixedly connected to the upper end of the fixing column 2.

[0026] Please see Figure 3 A second sliding groove 14 is provided on one side of the fixing block 3. The inner wall of the second sliding groove 14 is slidably connected to one side of the clamping block 13. The fixing block 3 is provided with the second sliding groove 14. When the piston rod body 15 is clamped, the clamping block 13 can slide inside the second sliding groove 14. The second sliding groove 14 can guide the clamping block 13. A rotating groove 4 is provided on the inner side of the fixing block 3. A fixing plate 5 is fixedly connected inside the rotating groove 4. The inner wall of the fixing plate 5 is rotatably connected to the outer surface of the worm 8. The fixing plate 5 is installed inside the rotating groove 4. The fixing plate 5 can fix the worm 8 and prevent the worm 8 from shaking when rotating, thus playing a fixing role.

[0027] Please see Figure 5 A fixed plate 5 is fixedly connected inside the rotating groove 4, and a hydraulic cylinder 6 is fixedly connected inside the rotating groove 4. An oil inlet 18 is opened on one side of the hydraulic cylinder 6, and an oil outlet 19 is opened on the other side. Both the hydraulic cylinder 6 and the hydraulic cylinder 6 are provided with an oil inlet 18 and an oil outlet 19. When the piston rod body 15 is clamped, hydraulic oil is injected through the oil inlet 18. The hydraulic oil pushes the telescopic rod 7 inside the hydraulic cylinder 6 to extend and retract. When it is retracted, the hydraulic oil is discharged through the oil outlet 19, so that the telescopic rod 7 can be retracted into the hydraulic cylinder 6. The telescopic rod 7 is slidably connected to the inner wall of the hydraulic cylinder 6, and a worm 8 is slidably connected to the outer surface of the telescopic rod 7. The worm 8 passes through the fixed plate 5. The end of the worm 8 away from the fixed plate 5 is rotatably connected to the inner wall of the fixed block 3. The other end of the worm 8 is installed inside the fixed block 3. When the worm 8 rotates, it can prevent the worm 8 from tilting during rotation.

[0028] Please see Figure 4 The outer surface of the worm 8 is meshed with a worm wheel 9, and a rotating block 10 is fixedly connected to the inner side of the worm wheel 9. The outer surface of the rotating block 10 is rotatably connected to the inside of the rotating groove 4, and the inner wall of the rotating block 10 is rotatably connected to the inside of the fixed block 3. The rotating block 10 can be driven to rotate inside the rotating groove 4 by the hydraulic cylinder 6, thereby driving the clamping block 13 to clamp the piston rod body 15. A first sliding groove 11 is opened on one side of the rotating block 10, and a limit post 12 is slidably connected inside the first sliding groove 11. One end of the limit post 12 is... A clamping block 13 is fixedly connected. When clamping piston rods of different sizes, the hydraulic cylinder 6 can push the telescopic rod 7 to extend and retract. When the telescopic rod 7 extends and retracts, it can drive the worm gear 9 to rotate. The telescopic rod 7 is provided with a threaded block, which can rotate in the sliding groove provided inside the worm gear 9. Thus, the dynamic motion can be converted from hydraulic to mechanical, driving the worm gear 9 to rotate. This can drive the rotating block 10 and the clamping block 13 to clamp the piston rod, so that the clamping block 13 can clamp the piston rod according to the different sizes of piston rods.

[0029] The hydraulic cylinder 6 in this application is a common electrical device in the prior art, and its model or specific structure will not be described in detail in this application.

[0030] Working principle: When the piston rod needs to be clamped, hydraulic oil enters the hydraulic cylinder 6 from the oil inlet 18, pushing the telescopic rod 7 to extend outward. When it needs to be released, hydraulic oil is discharged from the oil outlet 19, and the telescopic rod 7 retracts inward. When the telescopic rod 7 extends, its linear motion drives the worm gear 8 to rotate clockwise through its sliding connection with the worm gear 8. When the telescopic rod 7 retracts, it drives the worm gear 8 to rotate counterclockwise. The rotation of the worm gear 8 drives the worm wheel 9 to rotate. When the worm wheel 9 rotates counterclockwise, it drives the rotating block 10 to rotate counterclockwise synchronously. This causes the first sliding groove 11 on the rotating block 10 to push the limiting post 12 to move radially outward, thereby allowing the clamping block 13 to move. Expanding outward along the second slide groove 14, it can be adjusted according to the diameter of the piston rod. When the worm gear 9 rotates clockwise, it can drive the rotating block 10 to rotate clockwise, thereby driving the first slide groove 11 on the rotating block 10 to pull the limiting post 12 to move radially inward. This allows the clamping block 13 to retract inward along the second slide groove 14, thereby clamping the piston rod. The piston rod body 15 is placed on the slidingly connected placement block 16, and its position can be adjusted along the fixed frame 17. When the clamping block 13 clamps radially, a three-point positioning is formed. The two clamping blocks 13 provide radial clamping force, and the placement block 16 provides axial support, thus realizing the clamping of piston rods of different diameters.

[0031] This design perfectly solves the clamping problem of piston rods with different diameters in the background technology, while ensuring machining stability through mechanical self-locking.

[0032] 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 illustrative of the 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic clamping device for piston rod machining, comprising a base (1), characterized in that: A fixed column (2) is fixedly connected to the upper surface of the base (1), and a fixed block (3) is fixedly connected to the upper end of the fixed column (2). A rotating groove (4) is opened on the inner side of the fixed block (3). A fixed plate (5) is fixedly connected inside the rotating groove (4). A hydraulic cylinder (6) is fixedly connected inside the rotating groove (4). A telescopic rod (7) is slidably connected to the inner wall of the hydraulic cylinder (6), and a worm gear (8) is slidably connected to the outer surface of the telescopic rod (7). The outer surface of the worm (8) is engaged with a worm wheel (9), and a rotating block (10) is fixedly connected to the inner side of the worm wheel (9). A first sliding groove (11) is provided on one side of the rotating block (10), and a limiting post (12) is slidably connected inside the first sliding groove (11). A clamping block (13) is fixedly connected to one end of the limiting post (12).

2. The hydraulic clamping device for piston rod machining according to claim 1, characterized in that: A fixing plate (5) is fixedly connected inside the rotating groove (4), and the inner wall of the fixing plate (5) is rotatably connected to the outer surface of the worm (8).

3. The hydraulic clamping device for piston rod machining according to claim 2, characterized in that: The worm (8) passes through the fixed plate (5), and the end of the worm (8) away from the fixed plate (5) is rotatably connected to the inner wall of the fixed block (3).

4. The hydraulic clamping device for piston rod machining according to claim 1, characterized in that: The outer surface of the rotating block (10) is rotatably connected to the inside of the rotating groove (4), and the inner wall of the rotating block (10) is rotatably connected to the inside of the fixed block (3).

5. The hydraulic clamping device for piston rod machining according to claim 4, characterized in that: A second groove (14) is provided on one side of the fixing block (3), and the inner wall of the second groove (14) is slidably connected to one side of the clamping block (13).

6. The hydraulic clamping device for piston rod machining according to claim 1, characterized in that: A fixing frame (17) is fixedly connected to the upper surface of the base (1), and a placement block (16) is fixedly connected to one side of the fixing frame (17). A piston rod body (15) is slidably connected to the upper surface of the placement block (16).

7. The hydraulic clamping device for piston rod machining according to claim 1, characterized in that: The hydraulic cylinder (6) has an oil inlet (18) on one side and an oil outlet (19) on one side.

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