Self-adaptive clamping device for high-speed numerical control machine tool

Abstract

The utility model relates to a self-adaptive clamping device for a high-speed numerical control machine tool, which comprises a mounting shell, a fixing plate arranged on the mounting shell, a plurality of sliding grooves distributed on the fixing plate in an array mode, connecting sleeves arranged in the sliding grooves in a sliding mode, a limiting assembly arranged between the connecting sleeves and the fixing plate, a rotating shaft arranged in the connecting sleeves in a rotating mode, and an eccentric wheel arranged on the rotating shaft at the upper end of the fixing plate. A driven gear is slidably arranged on the rotating shaft at the lower end, a spline block used for axially limiting the driven gear is arranged on the rotating shaft, a limiting sleeve used for longitudinally limiting the driven gear is further arranged on the rotating shaft, a main shaft driven by a motor is rotatably arranged on the lower end face of the fixing plate, a plurality of main gears are sequentially arranged on the main shaft from large to small, and the driven gears are meshed with the same main gear. According to the clamp, workpieces with larger or smaller diameters can be clamped under the condition that clamping components are not disassembled, the clamping size range is large, the applicability is high, and the clamp is convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool clamps, and particularly relates to an adaptive clamping device for high-speed numerically controlled machine tools. Background Art

[0002] A machine tool fixture is a device used to clamp workpieces and guide cutting tools on machine tools. When a workpiece is clamped with a fixture, the position accuracy of the workpiece relative to the cutting tool and the machine tool is guaranteed by the fixture and is not affected by the worker's technical level, making the machining accuracy of the same batch of workpieces tend to be consistent. The workpiece clamping is convenient and quick, which not only ensures the machining accuracy of the workpiece, but also reduces auxiliary working hours and improves labor productivity.

[0003] The utility model patent with authorization announcement number CN221110824U discloses a machine tool clamp. Although it is convenient to limit products of different shapes and improves applicability, the following problems still exist: since the two clamps are elliptical and fixed, the maximum diameter of the workpiece that can be limited is fixed, depending on the size of the clamp and the distance between the two clamps. If a large-diameter workpiece needs to be limited, the clamp needs to be removed and replaced or the distance between the clamps needs to be adjusted, which is inconvenient to use and affects the processing efficiency; at the same time, due to the elliptical clamp, for some regular workpieces, the clamping force of the workpiece can only be guaranteed when the two clamps clamp the center force point of the workpiece at the same time to avoid the workpiece from being skewed, and workers need to place the workpiece accurately, which is inconvenient to operate, resulting in its low applicability. Utility Model Content

[0004] In order to solve the problems of the prior art, the utility model proposes an adaptive clamping device for high-speed CNC machine tools, which solves the problems of inconvenient use and low applicability of the current clamps.

[0005] The purpose of the utility model and the technical problem to be solved are achieved by adopting the following technical solutions. According to the utility model, an adaptive clamping device for high-speed CNC machine tools includes a mounting shell, a fixed plate is provided on the mounting shell, a plurality of slide grooves are arranged in an array on the fixed plate, a connecting sleeve is provided in the slide groove for sliding, a limiting assembly is provided between the connecting sleeve and the fixed plate, a rotating shaft is provided in the connecting sleeve for rotation, an eccentric wheel is provided on the rotating shaft at the upper end of the fixed plate, a slave gear is provided on the rotating shaft at the lower end for sliding, a spline block for axial limiting of the slave gear is provided on the rotating shaft, and a limiting sleeve for longitudinal limiting of the slave gear is also provided, a main shaft driven by a motor is provided for rotation on the lower end surface of the fixed plate, a plurality of main gears are provided on the main shaft in order from large to small, and a plurality of slave gears are meshed with the same main gear.

[0006] The beneficial effects are as follows: A rotatable shaft is provided, and an eccentric wheel for clamping the workpiece is arranged on the shaft. The shaft can always be driven by the main shaft, thereby driving the eccentric wheel to clamp the workpiece. It can clamp workpieces with larger or smaller diameters without disassembling the clamping components, with a large clamping size range, strong applicability, and convenience in use. At the same time, multiple eccentric wheels are provided, with low requirements for the placement accuracy of the workpiece, easy to operate, and convenient for clamping regular workpieces.

[0007] Further, an anti-slip pad is arranged on the side wall of the eccentric wheel.

[0008] The beneficial effects are as follows: It can increase the friction with the workpiece, improve the clamping force on the workpiece, and at the same time reduce the damage to the surface of the workpiece, ensuring the surface quality of the workpiece.

[0009] Further, adjusting holes are arranged on both sides of the mounting shell, and a cover plate is hinged on the side wall of the mounting shell. The cover plate is used to close the adjusting holes.

[0010] The beneficial effects are as follows: The adjusting holes can facilitate workers to adjust the position of the slave gear, making it convenient to use.

[0011] Further, a top block for limiting the position of the limiting sleeve is arranged at the lower end of the shaft.

[0012] The beneficial effects are as follows: It can prevent the slave gear from falling off the shaft when moving, facilitating the operation of workers.

[0013] Further, the limiting component includes a pin hole arranged on the fixed plate, and a pin shaft penetrates through the connecting sleeve. The pin shaft passes through the connecting sleeve and is inserted into the pin hole.

[0014] The beneficial effects are as follows: It can quickly limit the position of the fixed plate and the connecting sleeve, improving work efficiency.

[0015] Further, an annular clamping plate is arranged on the lower end surface of the eccentric wheel.

[0016] The beneficial effects are as follows: It is convenient to limit the position of thinner workpieces, further expanding the application range of the device, improving applicability. At the same time, when clamping the workpiece, it can increase the contact area with the workpiece, improving the clamping force on the workpiece.

[0017] In summary, the present utility model arranges an eccentric wheel for clamping on the movable shaft, and at the same time arranges a plurality of main gears with different sizes to drive the shaft to rotate. It can adjust the position of the eccentric wheel according to the size of the workpiece, enabling it to clamp larger or smaller workpieces, with a large clamping size range. At the same time, it is also convenient to clamp regular workpieces, convenient to use, and has strong applicability.

[0018] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following preferred embodiments are specifically given and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0019] Figure 1 is the top view of the present utility model;

[0020] Figure 2 is Figure 1 the left side view of

[0021] Figure 3 is Figure 2 the cross-sectional view taken along line A-A in

[0022] Figure 4 the schematic diagram of the eccentric wheel and the clamping plate. Specific Embodiment

[0023] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0024] An embodiment of an adaptive clamping device for a high-speed numerical control machine tool:

[0025] As Figures 1 to 3 , an adaptive clamping device for a high-speed numerical control machine tool includes a mounting shell 1 connected to the machine tool. A fixing plate 2 is provided on the mounting shell 1. The fixing plate 2 is the working surface. Four sliding grooves 3 are provided on the fixing plate 2. The four sliding grooves 3 are arranged in a circumferential array (the included angle between two adjacent sliding grooves 3 is 90°, and the two opposite sliding grooves 3 are on the same straight line). A connecting sleeve 8 is slidably arranged in the sliding groove 3. A limiting component is provided between the connecting sleeve 8 and the fixing plate 2. The limiting component is used to fix the connecting sleeve 8 on the fixing plate 2, so as to realize the limitation of the rotating shaft 7. A rotating shaft 7 is rotatably arranged in the connecting sleeve 8. An eccentric wheel 6 for clamping the workpiece is provided on the rotating shaft 7 at the upper end of the fixing plate 2. As Figure 1As shown, the four eccentric wheels 6 are also distributed in a circumferential array (the central line angle between two adjacent eccentric wheels 6 is 90°, and the central lines of the two opposite eccentric wheels 6 are on the same straight line), which can ensure that each eccentric wheel 6 is in contact with the workpiece, improve the clamping force on the workpiece. A follower gear 10 is slidably arranged on the lower end rotating shaft 7. A spline block 17 for circumferential limit of the follower gear 10 is arranged axially on the rotating shaft 7. A limit sleeve 11 for axial limit of the follower gear 10 is connected to the lower end face of the follower gear 10. A limit bolt 12 extending radially is connected to the limit sleeve 11. By tightening and loosening the limit bolt 12, the axial position of the follower gear 10 on the rotating shaft 7 is adjusted. Both the limit sleeve 11 and the follower gear 10 are provided with sliding holes for cooperating with the spline block 17, thus realizing the movement of the follower gear 10. The lower end face of the fixed plate 2 is rotatably provided with a main shaft 14 driven by a motor 15. The motor 15 is a brake motor. When the motor 15 is not powered on, the output shaft of the motor 15 is locked, so that the main shaft 14 and the rotating shaft 7 are locked, and the eccentric wheels 6 driven by the rotating shaft 7 lock the workpiece. A number of main gears 13 are arranged on the main shaft 14 from large to small in sequence. And the four follower gears 10 are meshed with the same main gear 13. The larger the main gear 13 meshed by the follower gear 10 is, the larger the diameter of the workpiece that the eccentric wheel 6 can clamp is, and vice versa. And the diameter of the follower gear 10 should be larger than the diameter of the smallest main gear 13, to avoid the largest diameter main gear 13 rubbing against the rotating shaft 7 when the follower gear 10 meshes with the smallest main gear 13. At the same time, the diameter of the smallest main gear 13 should not be too small. When the follower gear 10 meshes with the smallest main gear 13, it is necessary to avoid the collision between two adjacent eccentric wheels 6, which affects the use of the device.

[0026] Working process of this embodiment: When in use, start the motor 15 to drive the main gear 13 on the main shaft 14 to rotate, thereby driving the follower gear 10 to rotate. At the same time, the four rotating shafts 7 drive the corresponding eccentric wheels 6 to rotate in the same direction. The side walls of the four eccentric wheels 6 are in contact with the workpiece, and finally clamp the workpiece. Then the motor 15 is powered off and locked to realize the clamping of the workpiece.

[0027] When it is necessary to increase the clamping diameter of the eccentric wheel, first release the limit of the limit component, and then move the connecting sleeve 8 to the outside of the fixed plate 2, thereby driving the rotating shaft 7 to move. When it moves to be able to mesh with a larger size main gear 13, stop moving. Then release the limit of the limit sleeve 11 on the follower gear 10, move the follower gear 10 upward until it meshes with the main gear 13. Then use the limit sleeve 11 to limit the longitudinal position of the follower gear 10, and at the same time use the limit component to limit the connecting sleeve 8. The adjustment is completed. If it is necessary to reduce the clamping diameter of the eccentric wheel, the reverse operation is performed.

[0028] In this embodiment, an anti-slip pad 5 is provided on the side wall of the eccentric wheel 6, which can improve the friction force with the workpiece, improve the clamping force on the workpiece, and at the same time reduce the damage to the surface of the workpiece and ensure the surface quality of the workpiece.

[0029] In this embodiment, adjustment holes are provided on both sides of the mounting shell 1, and a cover plate 16 is hingedly provided on the side wall of the mounting shell 1. The cover plate 16 is used to close the adjustment holes, and the adjustment holes can facilitate workers to adjust the position of the driven gear 10, which is convenient for use.

[0030] In this embodiment, a top block 18 for limiting the position of the limiting sleeve 11 is provided at the lower end of the rotating shaft 7, which can prevent the driven gear 10 from falling off the rotating shaft 7 when moving, facilitating the operation of workers.

[0031] In this embodiment, the limiting assembly includes a pin hole 4 provided on the fixed plate 2. A pin shaft 9 is penetrated through the connecting sleeve 8, and the pin shaft 9 is inserted into the pin hole 4 through the connecting sleeve 8, which can realize the quick limitation of the fixed plate 2 and the connecting sleeve 8 and improve the working efficiency.

[0032] In this embodiment, an annular clamping plate 19 is provided on the lower end surface of the eccentric wheel 6, which is convenient for limiting thinner workpieces, further expanding the applicable range of the device, improving the applicability, and at the same time increasing the contact area with the workpiece when clamping the workpiece, improving the clamping force on the workpiece.

[0033] The above are only the preferred embodiments of the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An adaptive clamping device for a high-speed numerical control machine tool, comprising a mounting shell (1), characterized in that: The mounting shell (1) is provided with a fixing plate (2). A number of sliding grooves (3) are arranged in an array on the fixing plate (2). A connecting sleeve (8) is slidably arranged in the sliding groove (3). A limiting component is arranged between the connecting sleeve (8) and the fixing plate (2). A rotating shaft (7) is rotatably arranged in the connecting sleeve (8). An eccentric wheel (6) is arranged on the rotating shaft (7) at the upper end of the fixing plate (2). A driven gear (10) is slidably arranged on the rotating shaft (7) at the lower end. A spline block (17) for axially limiting the driven gear (10) is arranged on the rotating shaft (7). A limiting sleeve (11) for longitudinally limiting the driven gear (10) is also arranged. A main shaft (14) driven by a motor (15) is rotatably arranged on the lower end surface of the fixing plate (2). A number of main gears (13) are arranged on the main shaft (14) from large to small in sequence. And a number of driven gears (10) are meshed with the same main gear (13).

2. The adaptive clamping device for a high-speed numerical control machine tool according to claim 1, wherein: An anti-slip pad (5) is arranged on the side wall of the eccentric wheel (6).

3. An adaptive clamping device for a high-speed numerical control machine tool according to claim 1, characterized in that: Adjusting holes are arranged on both sides of the mounting shell (1). And a cover plate (16) is hinged on the side wall of the mounting shell (1). The cover plate (16) is used to close the adjusting holes.

4. An adaptive clamping device for a high-speed numerical control machine tool according to claim 1, characterized in that: A top block (18) for limiting the limiting sleeve (11) is arranged at the lower end of the rotating shaft (7).

5. The self - adaptive clamping device for a high - speed numerical control machine tool according to claim 1, characterized in that: The limiting component includes a pin hole (4) arranged on the fixing plate (2). A pin shaft (9) is arranged through the connecting sleeve (8). The pin shaft (9) passes through the connecting sleeve (8) and is inserted into the pin hole (4).

6. The self - adaptive clamping device for a high - speed numerical control machine tool according to claim 1, wherein: An annular clamping plate (19) is arranged on the lower end surface of the eccentric wheel (6).

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