Machine tool fixtures

Abstract

A machine tool machining fixture includes a fixed frame, a clamping assembly, a side-pressure assembly, and a limiting assembly. The clamping assembly includes a first clamping plate and a second clamping plate, which are arranged opposite to the first clamping plate. The first clamping plate can be adjusted horizontally. The side-pressure assembly includes a base, a turntable, a positioning nut passing through the turntable and mounted on the base, and a push rod mounted on the turntable. The turntable can rotate and adjust around the axis of the positioning nut on the base. The push rod assists in pushing the turntable to rotate. The turntable is eccentrically mounted on the base. When the turntable rotates, the outer circumferential surface of the turntable presses the second clamping plate closer to the first clamping plate or gradually releases the second clamping plate outward. The limiting assembly is located on the rotation path of the push rod and is used to limit the push rod, keeping the clamping assembly in a workpiece-clamped state. This utility model has simple overall operation and can realize the quick clamping and removal of workpieces on the fixture, making it highly practical.

Description

Technical Field

[0001] This utility model relates to a processing equipment, and more particularly to a machine tool processing fixture. Background Technology

[0002] Machine tool fixtures are devices used in machining to fix, position, and clamp workpieces, ensuring that the workpiece maintains the correct position and stability during machining. They act as a bridge between the workpiece and the machine tool, directly affecting machining accuracy, efficiency, and safety.

[0003] In machine tool processing, the locking methods of fixtures are divided into manual, pneumatic, hydraulic, and electric, and manufacturers choose according to actual needs. Although manual locking seems traditional, it has irreplaceable advantages in certain scenarios. During use, there is no need to purchase additional air pumps, hydraulic stations, or electric systems, and there is no need to use complex pipelines or electrical components. The failure rate is low, making it especially suitable for low-cost, small-scale machine tool processing.

[0004] The existing manually operated fixtures on machine tools still have drawbacks such as long clamping time and inconvenience in removing workpieces from the fixture, which cause trouble for manufacturers. Utility Model Content

[0005] Therefore, it is necessary to provide a machine tool processing fixture to address the shortcomings of existing technologies.

[0006] The technical solution of this utility model is as follows: a machine tool processing fixture, which includes a fixed frame, a clamping assembly, a side pressure assembly, and a limiting assembly. The clamping assembly includes a first clamping plate and a second clamping plate, which are arranged opposite to the first clamping plate. The first clamping plate can be adjusted in the horizontal direction. The side pressure assembly includes a base, a turntable, a positioning nut passing through the turntable and mounted on the base, and a push rod mounted on the turntable. The turntable can be rotated and adjusted around the axis of the positioning nut on the base. The push rod is used to assist in pushing the turntable to rotate. The turntable is eccentrically mounted on the base. When the turntable rotates, the outer circumferential surface of the turntable presses the second clamping plate closer to the first clamping plate or gradually releases the second clamping plate outward. The limiting assembly is set on the rotation path of the push rod and is used to limit the push rod so that the clamping assembly is kept in the state of clamping the workpiece.

[0007] In one embodiment, the fixing frame includes a base plate and a support plate, the support plate being vertically connected to the base plate, the clamping assembly being disposed between the side pressing assembly and the support plate, and the limiting assembly being disposed on one side of the side pressing assembly.

[0008] In one embodiment, the clamping assembly further includes a guide tube mounted on the first clamping plate and passing through the second clamping plate, a spring disposed between the first clamping plate and the second clamping plate and sleeved on the guide tube, and a gasket mounted on the first clamping plate and the second clamping plate.

[0009] In one embodiment, the gasket is made of a soft material, the first clamp is fixedly mounted on the support plate, one end of the guide tube is fixedly mounted on the first clamp in a horizontal direction, and the other end of the guide tube passes through the second clamp.

[0010] In one embodiment, a first positioning groove is provided on the side of the first clamping plate near the second clamping plate. The first positioning groove penetrates the first clamping plate vertically and gradually narrows in width from the direction away from the second clamping plate, thereby forming two first limiting surfaces distributed in a figure-eight shape on both sides of the groove wall. A second positioning groove is provided on the side of the second clamping plate near the first clamping plate. The second positioning groove penetrates the second clamping plate vertically and gradually narrows in width from the direction away from the first clamping plate, thereby forming two second limiting surfaces distributed in a figure-eight shape on both sides of the groove wall. The gasket is fixed to the second limiting surfaces and the first limiting surfaces.

[0011] In one embodiment, the turntable is generally arranged in a disc shape, and a through hole is provided on the turntable. The central axis of the through hole is located between the central axis of the turntable and the outer peripheral surface. The positioning nut passes through the through hole and is installed on the base. The through hole is eccentrically arranged on the turntable. During the rotation of the turntable, the mating position between the outer peripheral surface of the turntable and the second clamping plate changes.

[0012] In one embodiment, the push rod is connected to the outer peripheral surface of the turntable, and the positioning nut and the push rod are located on both sides of the central axis of the turntable.

[0013] In one embodiment, the limiting component includes a fixed sleeve, a limiting block that passes through the fixed sleeve and extends out of the fixed sleeve, an elastic element disposed inside the fixed sleeve and elastically abutting against the limiting block and the fixed sleeve, an adjusting rod that is mounted on the limiting block and extends out from one side of the fixed sleeve, and a limiting rod disposed behind the fixed sleeve. The limiting rod and the fixed sleeve are both mounted on a base plate. The top of the limiting block is provided with an inclined guide surface, which is disposed on the rotation path of the push rod.

[0014] In one embodiment, the fixing sleeve is provided with an adjustment groove extending downward from the upper end, and the fixing sleeve is also provided with an adjustment hole penetrating the side of the fixing sleeve in a horizontal direction. The elastic element is disposed in the adjustment groove, the limiting block extends out from the adjustment groove, and the adjustment rod is connected to the limiting block and extends out from the adjustment hole.

[0015] The beneficial effects of this machine tool machining fixture are as follows: By setting a first clamping plate and a second clamping plate on the clamping assembly, and with the turntable eccentrically mounted on the base, when the turntable rotates, the outer circumferential surface of the turntable presses the second clamping plate closer to the first clamping plate or gradually releases the second clamping plate outward. After the second clamping plate and the first clamping plate clamp the workpiece, the limiting component is used to limit the push rod, keeping the clamping assembly in the state of clamping the workpiece. This utility model is simple to operate and can realize the quick clamping and removal of workpieces on the fixture, making it highly practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the machine tool machining fixture of this utility model;

[0017] Figure 2 , Figure 3 Top view of the side pressure assembly of the machine tool processing fixture of this utility model when adjusted to different states;

[0018] Figure 4 This is a schematic diagram of the limiting component of the machine tool processing fixture of this utility model, wherein the limiting rod is not shown;

[0019] Figure 5 This is an exploded view of the limiting component of the machine tool processing fixture of this utility model, wherein the limiting rod is not shown;

[0020] Figure 6 This is an exploded view of the side pressure assembly of the machine tool machining fixture of this utility model. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Please see Figures 1 to 6 This utility model provides a machine tool processing fixture for clamping a cylindrical workpiece 100. The machine tool processing fixture includes a fixed frame 10, a clamping assembly 20, a side pressure assembly 30, and a limiting assembly 40. The side pressure assembly 30 is used to push the clamping assembly 20 to clamp the circumferential surface of the workpiece 100, and the limiting assembly 40 is used to limit the clamping assembly 20 so that the clamping assembly 20 is kept in the state of clamping the workpiece 100.

[0028] The fixing frame 10 includes a base plate 11 and a support plate 12. The support plate 12 is vertically connected to the base plate 11. The clamping assembly 20 is disposed between the side pressing assembly 30 and the support plate 12. The limiting assembly 40 is disposed on one side of the side pressing assembly 30.

[0029] The clamping assembly 20 includes a first clamping plate 21, a second clamping plate 22, a guide tube 23 mounted on the first clamping plate 21 and passing through the second clamping plate 22, a spring 24 disposed between the first clamping plate 21 and the second clamping plate 22 and sleeved on the guide tube 23, and a gasket 25 mounted on the first clamping plate 21 and the second clamping plate 22. The gasket 25 is made of a soft material, such as silicone or rubber, and has a certain cushioning elasticity. The first clamping plate 21 is fixedly mounted on the support plate 12, and the second clamping plate 22 is arranged opposite to the first clamping plate 21. One end of the guide tube 23 is fixedly mounted horizontally on the first clamping plate 21, and the other end passes through the second clamping plate 22. A first positioning groove 211 is provided on the side of the first clamping plate 21 near the second clamping plate 22. The first positioning groove 211 passes through the first clamping plate 21 vertically, and its width gradually narrows from the direction away from the second clamping plate 22, thereby providing a first positioning groove. The two sides of the positioning groove 211 form two first limiting surfaces 212 distributed in a figure-eight shape; the second clamping plate 22 is provided with a second positioning groove 221 on the side near the first clamping plate 21. The second positioning groove 221 penetrates the second clamping plate 22 in a vertical direction. The groove width of the second positioning groove 221 gradually narrows from the direction away from the first clamping plate 21, thereby forming two second limiting surfaces 222 distributed in a figure-eight shape on the two sides of the positioning groove 221. The gasket 25 is fixed on the second limiting surface 222 and the first limiting surface 212.

[0030] The side pressure assembly 30 includes a base 31, a turntable 32, a positioning nut 33 passing through the turntable 32 and mounted on the base 31, and a push rod 34 mounted on the turntable 32. The turntable 32 can be rotated and adjusted around the axis of the positioning nut 33 on the base 31, and the push rod 34 is used to assist in pushing the turntable 32 to rotate.

[0031] In this embodiment, the turntable 32 is generally arranged in a disc shape. A through hole 321 is provided on the turntable 32. The central axis of the through hole 321 is located between the central axis of the turntable 32 and the outer peripheral surface. The positioning nut 33 passes through the through hole 321 and is installed on the base 31. The through hole 321 is eccentrically arranged on the turntable 32. During the rotation of the turntable 32, the mating position between the outer peripheral surface of the turntable 32 and the second clamping plate 22 changes.

[0032] Specifically, the surface passing through both the central axis of the perforation 321 and the central axis of the turntable 32 is called the calibration surface 200. When the turntable 32 rotates, the position of the calibration surface 200 changes. When the calibration surface 200 is adjusted to be perpendicular to the second clamping plate 22, it is in the first position; when it is adjusted to be parallel to the second clamping plate 22, it is in the second position. When the calibration surface 200 is adjusted to the second position, the outer peripheral surface of the turntable 32 presses the second clamping plate 22 closer to the first clamping plate 21. Conversely, when the calibration surface 200 is adjusted to the first position, the outer peripheral surface of the turntable 32 gradually releases the second clamping plate 22 outward, and the spring 24 pushes the second clamping plate 22 away from the first clamping plate 21.

[0033] The push rod 34 is connected to the outer peripheral surface of the turntable 32, and the central axis of the push rod 34 is located on the calibration surface 200. The positioning nut 33 and the push rod 34 are located on both sides of the central axis of the turntable 32.

[0034] The limiting component 40 is disposed on the rotation path of the push rod 34. The limiting component 40 includes a fixed sleeve 41, a limiting block 42 that passes through and extends from the fixed sleeve 41, an elastic element 43 disposed inside the fixed sleeve 41 and elastically abutting against the limiting block 42 and the fixed sleeve 41, an adjusting rod 44 that is mounted on the limiting block 42 and extends from one side of the fixed sleeve 41, and a limiting rod 45 disposed behind the fixed sleeve 41. The limiting rod 45 and the fixed sleeve 41 are both mounted on the base plate 11. The fixed sleeve 41 is provided with an adjustment groove 411 extending downward from the upper end, and the fixed sleeve 41 is also provided with an adjustment hole 412 penetrating the side of the fixed sleeve 41 in a horizontal direction. The elastic element 43 is disposed in the adjustment groove 411. The limiting block 42 extends out from the adjustment groove 411. The adjustment rod 44 is connected to the limiting block 42 and extends out from the adjustment hole 412. The top position of the limiting block 42 is provided with an inclined guide surface 421, which is disposed on the rotation path of the push rod 34.

[0035] When the calibration surface 200 is adjusted to the second position, the push rod 34 slides over the inclined guide surface 421 of the limiting block 42 and presses the limiting block 42 downward. The elastic element 43 elastically contracts. After the push rod 34 slides over the limiting block 42, the elastic element 43 pushes the limiting block 42 back to its original position, so that the push rod 34 is stuck between the limiting block 42 and the limiting rod 45 in the horizontal direction.

[0036] When fixing workpiece 100, the turntable 32 is rotated by the push rod 34, causing the turntable 32 to release the second clamping plate 22, placing workpiece 100 between the first clamping plate 21 and the second clamping plate 22. The turntable 32 is then rotated again by the push rod 34, adjusting the calibration surface 200 to the second position. The outer circumferential surface of the turntable 32 presses the second clamping plate 22 closer to the first clamping plate 21, causing the spring 24 to elastically contract. Workpiece 100 is clamped between the shims 25 fixed to the first and second clamping plates 21 and 22. Because the shims 25 are made of soft material, on the one hand, direct hard contact between the clamping plates and workpiece 100 can be avoided, thus preventing damage to the outer surface of workpiece 100; on the other hand, even if there are slight deviations in the dimensions of workpiece 100, the first and second clamping plates 21 and 22 can still clamp workpiece 100 through the shims 25. The push rod 34 is horizontally engaged between the limiting block 42 and the limiting rod 45, keeping the clamping assembly 20 in the state of clamping workpiece 100.

[0037] When it is necessary to remove workpiece 100, press the limiting block 42 downward with the adjusting rod 44, and then rotate the push rod 34 in the opposite direction to adjust the calibration surface 200 to the first position. The outer peripheral surface of the turntable 32 gradually loosens the second clamping plate 22 outward. The spring 24 pushes the second clamping plate 22 to move away from the first clamping plate 21. The second clamping plate 22 and the second clamping plate 22 loosen the workpiece 100, and then the workpiece 100 is removed.

[0038] The beneficial effects of this machine tool processing fixture are as follows: By setting a first clamping plate 21 and a second clamping plate 22 on the clamping assembly 20, the first clamping plate 21 can be adjusted in the horizontal direction. The turntable 32 is eccentrically mounted on the base 31. When the turntable 32 is rotated, the outer circumferential surface of the turntable 32 presses the second clamping plate 22 closer to the first clamping plate 21 or gradually releases the second clamping plate 22 outward. After the second clamping plate 22 and the first clamping plate 21 clamp the workpiece 100, the limiting assembly 40 is used to limit the push rod 34, so that the clamping assembly 20 remains in the state of clamping the workpiece 100. This utility model is simple to operate and can realize the quick clamping and removal of the workpiece 100 on the fixture, making it highly practical.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A machine tool machining fixture, characterized in that, The device includes a fixing frame, a clamping assembly, a side-pressure assembly, and a limiting assembly. The clamping assembly includes a first clamping plate and a second clamping plate, which are arranged opposite to each other. The first clamping plate can be adjusted in the horizontal direction. The side-pressure assembly includes a base, a turntable, a positioning nut passing through the turntable and mounted on the base, and a push rod mounted on the turntable. The turntable can rotate and adjust around the axis of the positioning nut on the base. The push rod is used to assist in pushing the turntable to rotate. The turntable is eccentrically mounted on the base. When the turntable rotates, the outer circumferential surface of the turntable presses the second clamping plate closer to the first clamping plate or gradually releases the second clamping plate outward. The limiting assembly is set on the rotation path of the push rod and is used to limit the push rod, so that the clamping assembly is kept in the state of clamping the workpiece.

2. The machine tool machining fixture according to claim 1, characterized in that, The fixing frame includes a base plate and a support plate. The support plate is vertically connected to the base plate. The clamping assembly is located between the side pressure assembly and the support plate. The limiting assembly is located on one side of the side pressure assembly.

3. The machine tool machining fixture according to claim 2, characterized in that, The clamping assembly also includes a guide tube installed on the first clamping plate and passing through the second clamping plate, a spring disposed between the first clamping plate and the second clamping plate and sleeved on the guide tube, and a gasket installed on the first clamping plate and the second clamping plate.

4. The machine tool machining fixture according to claim 3, characterized in that, The gasket is made of a soft material. The first clamp is fixedly installed on the support plate. One end of the guide tube is fixedly installed on the first clamp in the horizontal direction, and the other end of the guide tube passes through the second clamp.

5. The machine tool machining fixture according to claim 3, characterized in that, A first positioning groove is provided on the side of the first clamping plate near the second clamping plate. The first positioning groove penetrates the first clamping plate vertically and gradually narrows in width from the direction away from the second clamping plate, thereby forming two first limiting surfaces distributed in a figure-eight shape on both sides of the groove wall. A second positioning groove is provided on the side of the second clamping plate near the first clamping plate. The second positioning groove penetrates the second clamping plate vertically and gradually narrows in width from the direction away from the first clamping plate, thereby forming two second limiting surfaces distributed in a figure-eight shape on both sides of the groove wall. The gasket is fixed on the second limiting surface and the first limiting surface.

6. The machine tool machining fixture according to claim 2, characterized in that, The turntable is generally arranged in a disc shape. A through hole is provided on the turntable. The central axis of the through hole is located between the central axis of the turntable and the outer peripheral surface. The positioning nut passes through the through hole and is installed on the base. The through hole is eccentrically arranged on the turntable. During the rotation of the turntable, the mating position between the outer peripheral surface of the turntable and the second clamping plate changes.

7. The machine tool machining fixture according to claim 6, characterized in that, The push rod is connected to the outer circumferential surface of the turntable, and the positioning nut and the push rod are located on both sides of the central axis of the turntable.

8. The machine tool machining fixture according to claim 2, characterized in that, The limiting assembly includes a fixed sleeve, a limiting block that passes through the fixed sleeve and extends out of the fixed sleeve, an elastic element that is disposed inside the fixed sleeve and elastically abuts against the limiting block and the fixed sleeve, an adjusting rod that is installed on the limiting block and extends out from one side of the fixed sleeve, and a limiting rod disposed behind the fixed sleeve. The limiting rod and the fixed sleeve are both mounted on the base plate. The top position of the limiting block is provided with an inclined guide surface, which is disposed on the rotation path of the push rod.

9. The machine tool machining fixture according to claim 8, characterized in that, The fixed sleeve is provided with an adjustment groove extending downward from the upper end, and the fixed sleeve is also provided with an adjustment hole penetrating the side of the fixed sleeve in a horizontal direction. The elastic element is disposed in the adjustment groove, the limiting block extends out from the adjustment groove, and the adjustment rod is connected to the limiting block and extends out from the adjustment hole.

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