A machine tool clamping fixture

Abstract

This utility model discloses a machine tool clamping fixture, comprising: a multi-jaw chuck, including a chuck body, six sets of jaws sleeved inside the chuck body, an adjusting linkage two movably sleeved inside the jaws, a support block fixedly connected to the outer wall of the adjusting linkage two, a limiting slide post fitted to the outer wall of the support block, and a knob fixedly connected to the outer wall of the adjusting linkage two for quick loading and unloading of the jaws and the chuck body. It can flexibly switch between three-jaw and four-jaw modes through the chuck's internal settings, directly adapting to the processing of symmetrical and irregularly shaped parts. It eliminates the need to stop the machine to change the chuck, significantly saving disassembly and calibration time, reducing the loss of fitting accuracy caused by repeated chuck disassembly and assembly, reducing workpiece processing errors, and also reducing manual operation steps, effectively controlling labor costs.

Description

Technical Field

[0001] This utility model relates to the field of clamping fixture technology, and in particular to a machine tool clamping fixture. Background Technology

[0002] Machine tool clamping fixtures are auxiliary devices used in machine tool processing for positioning and clamping workpieces. Their core function is to ensure that the workpiece is fixed in position and has a precise posture during processing, while also bearing the cutting force. This reduces workpiece clamping time and ensures machining accuracy.

[0003] Currently, three-jaw and four-jaw chucks are commonly used as clamping fixtures in machine tools. However, their compatibility is limited. Three-jaw chucks can only efficiently clamp symmetrical workpieces. When encountering irregularly shaped workpieces, they need to be replaced. Although four-jaw chucks can clamp irregularly shaped workpieces, they are difficult to meet the batch processing of symmetrical workpieces. Frequent chuck replacements not only require machine downtime for disassembly, assembly, and calibration, which is time-consuming and inefficient, but also easily damages the fitting accuracy, increases workpiece processing errors, and drives up labor costs. Utility Model Content

[0004] This utility model provides a machine tool clamping fixture to solve the above-mentioned problems.

[0005] This utility model provides a machine tool clamping fixture, comprising:

[0006] A multi-jaw chuck includes a chuck body, six sets of jaws sleeved inside the chuck body, an adjusting link two movably sleeved inside the jaws, a support block fixedly connected to the outer wall of the adjusting link two, a limiting slide post fitted to the outer wall of the support block, and a knob fixedly connected to the outer wall of the adjusting link two for quick loading and unloading of the jaws and the chuck body.

[0007] The transmission device, located at the bottom of the jaws and sleeved with the chuck body, includes a turbine pattern, a rotating gear disk fixedly connected to the bottom of the turbine pattern, a gear meshing on the side of the rotating gear disk, and an adjusting linkage fixedly sleeved on the inner wall of the gear. It is used to drive multiple sets of jaws to move inside the chuck body to clamp the workpiece.

[0008] In a machine tool clamping fixture according to one embodiment of the present invention, the jaws are arranged in a circumferential array, wherein four sets of jaws divide the chuck body into four equal parts, and one set of jaws and the other two sets of jaws divide the chuck body into three equal parts.

[0009] In a machine tool clamping fixture according to one embodiment of the present invention, the outer wall of the adjusting connecting rod is movably sleeved with the chuck body, and the outer end of the adjusting connecting rod is in the form of an internal hexagonal thread.

[0010] In a machine tool clamping fixture according to an embodiment of the present invention, the top end of the adjusting connecting rod two is fixedly connected to a limiting block, and the inner wall of the limiting block is movably sleeved with two sets of limiting posts, and the outer wall of the limiting posts is fixedly connected to the inner wall of the jaws.

[0011] In a machine tool clamping fixture according to one embodiment of the present invention, a second spring is movably sleeved on the inner wall of the chuck, and the side of the second spring is in contact with the outer wall of the limiting block.

[0012] In a machine tool clamping fixture according to one embodiment of the present invention, a connecting push plate is attached to the outer wall of the limiting slide column, one end of a spring is fixedly connected to the back of the connecting push plate, and the other end of the spring is fixedly connected to the inside of the chuck.

[0013] In a machine tool clamping fixture according to an embodiment of the present invention, the chuck body has limit slots on both sides near the jaws. The limit slots are in the shape of barbs, and the width of the limit slots is greater than the diameter of the limit slide column.

[0014] The technical solutions provided in this application can include the following beneficial effects: This application designs a machine tool clamping fixture that can flexibly switch between three-jaw and four-jaw modes by setting the chuck inside. It can be directly adapted to the processing of symmetrical and irregular parts without stopping the machine to replace the chuck, which greatly saves disassembly and calibration time, reduces the loss of fitting accuracy caused by repeated disassembly and assembly of the chuck, reduces workpiece processing errors, and can also reduce manual operation steps and effectively control labor costs.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a machine tool clamping fixture provided in one embodiment of this application;

[0018] Figure 2 yes Figure 1 Internal structure diagram;

[0019] Figure 3 yes Figure 1 A partial split diagram;

[0020] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure;

[0021] Figure 5 yes Figure 3 Internal structure diagram;

[0022] Figure 6 yes Figure 1 A schematic diagram of the cross-sectional structure.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Chuck body; 2. Chuck claw; 3. Rotating gear; 4. Turbine pattern; 5. Gear; 6. Adjusting linkage one; 7. Connecting push plate; 8. Spring one; 9. Knob; 10. Spring two; 11. Limiting block; 12. Limiting post; 13. Adjusting linkage two; 14. Limiting slide post; 15. Supporting block; 16. Limiting slot. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] like Figures 1 to 6As shown, this application provides a machine tool clamping fixture, including: a multi-jaw chuck, including a chuck body 1, six sets of jaws 2 sleeved inside the chuck body 1, an adjusting linkage 13 movably sleeved inside the jaws 2, a support block 15 fixedly connected to the outer wall of the adjusting linkage 13, a limiting slide post 14 fitted to the outer wall of the support block 15, and a knob 9 fixedly connected to the outer wall of the adjusting linkage 13 for quick loading and unloading of the jaws 2 and the chuck body 1; the jaws 2 are arranged in a circumferential array, wherein four sets of jaws 2 divide the chuck body 1 into four equal parts, and one set of jaws 2 and the other two sets of jaws 2 divide the chuck body 1 into three equal parts.

[0029] After adopting the above technical solution, the chuck body 1 is innovatively fitted with six independent jaws 2. This design breaks through the functional limitations of traditional three-jaw and four-jaw chucks. When clamping symmetrical workpieces such as shafts and discs, the operator can directly activate the three jaws 2 that are evenly distributed in three equal parts. With the help of the chuck's automatic centering mechanism, the workpiece can be quickly centered and aligned. At the same time, the three jaws apply clamping force synchronously, ensuring that the workpiece remains in a stable clamping state during the processing, effectively avoiding processing errors caused by clamping offset. When encountering irregularly shaped parts such as squares and ovals, it is not necessary to replace the entire chuck body 1. Only the jaws 2 in the corresponding positions of the six jaws need to be flexibly adjusted according to the contour of the irregularly shaped part and the clamping requirements. By adjusting the extension length and clamping angle of the target jaw individually, different shaped parts can be adapted. This greatly reduces the frequency of frequently changing the chuck body in traditional processing, which not only shortens the overall workpiece setup and adjustment time, but also avoids the adverse effects on clamping accuracy caused by repeated disassembly and assembly of the chuck.

[0030] When the chuck 2 is worn, deformed, or damaged, or when different specifications of chuck need to be replaced due to processing requirements, a single set of chucks can be disassembled independently. Even during processing, if the position or state of a certain set of chucks 2 affects the normal clamping of the workpiece, it can also be disassembled and adjusted at any time. First, locate the preset knob 9 on the outside of each set of chucks 2, and push the knob 9 smoothly towards the chuck 2. After moving it to the preset unlocking position, turn the knob 9 clockwise or counterclockwise by a quarter turn. This rotation will simultaneously drive the internal mechanism of the chuck. Rotating the second adjusting rod 13 causes the limiting block 11 fixed on the back of the second adjusting rod 13 to disengage from the limiting post 12 inside the chuck body. Simultaneously, the support block 15 connected to the second adjusting rod 13 slowly rotates from its original horizontal support state to a vertical state. At this point, the lateral thrust of the support block 15 on the two limiting slide posts 14 disappears, and the limiting slide posts 14 retract into the cavity of the jaw 2 under the action of the internal structure. Thus, the fixed constraint of the jaw 2 is completely released, allowing the operator to easily remove and replace it. Furthermore, by adjusting the clamping orientation of the jaw 2 inside the chuck body 1, the stepped teeth pre-set on the outer wall of the jaw 2 can be used to achieve precise clamping of workpieces of different diameters and contours, further expanding the chuck's applicability.

[0031] In an optional embodiment, the transmission device, located at the bottom end of the jaw 2 and sleeved with the chuck body 1, includes a turbine pattern 4, a rotating gear 3 fixedly connected to the bottom end of the turbine pattern 4, a gear 5 meshing with the side of the rotating gear 3, and an adjusting connecting rod 6 fixedly sleeved on the inner wall of the gear 5, for driving multiple sets of jaws 2 to move inside the chuck body 1 to clamp the workpiece. After the chuck body 1 completes the selection and installation of the jaws, it enters the workpiece clamping stage. The operator drives the adjusting linkage 6 to rotate smoothly in the internal cavity of the chuck body 1 through the external drive structure. The rotation of the adjusting linkage 6 will directly drive the gear 5 fixed to it to rotate synchronously. Since the gear 5 is engaged with the rotating gear 3 below, the rotation of the gear 5 will drive the rotating gear 3 to rotate along a preset trajectory inside the chuck body 1. The top of the rotating gear 3 is machined with continuous turbine patterns 4. As the rotating gear 3 rotates, the turbine patterns 4 also rotate synchronously. The turbine patterns 4 are engaged with the tooth groove at the bottom of the jaw 2 at the top. Therefore, the rotation of the turbine patterns 4 will be converted into linear motion of the jaw 2, driving all the activated jaws 2 to move synchronously radially inside the chuck body 1, and finally achieving stable clamping of the external workpiece.

[0032] In an optional embodiment, a limiting block 11 is fixedly connected to the top of the adjusting link 2 13. Two sets of limiting posts 12 are movably sleeved on the inner wall of the limiting block 11, and the outer wall of the limiting post 12 is fixedly connected to the inner wall of the jaw 2. To ensure the stability of the chuck during the machining process, by setting the cooperation structure between the limiting block 11 and the limiting post 12, when the jaw 2 does not need to be adjusted or is in a clamped state, the limiting block 11 will be firmly sleeved on the limiting post 12, rigidly fixing the rotation angle of the supporting block 15. This effectively avoids the supporting block 15 from accidentally flipping due to vibration, cutting force impact, etc. during the machine tool machining process, thereby preventing the limiting slide 14 from losing its constraint, the jaw 2 from loosening, and ultimately the risk of workpiece loosening.

[0033] In an optional embodiment, a second spring 10 is movably sleeved on the inner wall of the claw 2, and the side of the second spring 10 fits against the outer wall of the limiting block 11. A second spring 10 is added at the connection between the adjusting link 2 13 and the claw 2. In its natural state, the second spring 10 is slightly compressed, and the elastic potential energy it generates continuously applies a pushing force towards the limiting post 12 to the limiting block 11, further enhancing the sleeve stability of the limiting block 11 and the limiting post 12, ensuring that the two always maintain a reliable connection and avoiding gaps in the structural connection.

[0034] In an optional embodiment, a connecting push plate 7 is attached to the outer wall of the limiting slide post 14. One end of a spring-8 is fixedly connected to the back of the connecting push plate 7, and the other end of the spring-8 is fixedly connected to the inside of the claw 2. The connecting push plate 7 is fitted onto the outside of the limiting slide post 14, and the spring-8 is provided between the connecting push plate 7 and the cavity wall of the claw 2. When the supporting block 15 rotates to the vertical position, its blocking effect on the connecting push plate 7 disappears. At this time, the spring-8 releases its elastic potential energy, pushing the connecting push plate 7 to move quickly toward the center side of the claw 2. The movement of the connecting push plate 7 will directly drive the limiting slide post 14 to retract synchronously into the cavity of the claw 2. No additional manual force is required, which greatly simplifies the disassembly process of the claw and realizes the rapid replacement of the claw.

[0035] In an optional embodiment, the chuck body 1 has limit slots 16 on both sides near the jaws 2. The limit slots 16 are hook-shaped, and their width is greater than the diameter of the limit sliding pins 14. The inner wall of the chuck body 1 is also machined with limit slots 16 that are adapted to the limit sliding pins 14. These slots are divided into straight and curved sections. When a set of jaws 2 is not needed for clamping operations, the operator can gently pull the set of jaws 2 upwards, causing the limit sliding pins 14 on both sides of the jaws to slide upwards along the straight section of the limit slot 16. When they slide to the curved section, the limit sliding pins 14 will naturally embed into the curved section and achieve a fixed engagement. At this time, the tooth grooves at the bottom of the jaws 2 are completely disengaged from the turbine pattern 4. Even if the turbine pattern 4 rotates with the rotating gear 3, the position of the set of jaws 2 will not change, thus achieving effective storage and fixation of the idle jaws and preventing them from interfering with the normal clamping jaw operation.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A machine tool clamping fixture, characterized in that, include: A multi-jaw chuck includes a chuck body (1), six sets of jaws (2) sleeved inside the chuck body (1), an adjusting link two (13) movably sleeved inside the jaws (2), a support block (15) fixedly connected to the outer wall of the adjusting link two (13), a limiting slide post (14) fitted to the outer wall of the support block (15), and a knob (9) fixedly connected to the outer wall of the adjusting link two (13) for quickly loading and unloading the jaws (2) from the chuck body (1). The transmission device, located at the bottom end of the jaws (2) and sleeved with the chuck body (1), includes a turbine pattern (4), a rotating gear disk (3) fixedly connected to the bottom end of the turbine pattern (4), a gear (5) meshing with the side of the rotating gear disk (3), and an adjusting connecting rod (6) fixedly sleeved on the inner wall of the gear (5), which is used to drive multiple sets of jaws (2) to move inside the chuck body (1) to clamp the workpiece.

2. A machine tool clamp jig according to claim 1, wherein The jaws (2) are arranged in a circular array, with four sets of jaws (2) dividing the chuck body (1) into four equal parts, and one set of jaws (2) and the other two sets of jaws (2) dividing the chuck body (1) into three equal parts.

3. The machine tool clamp jig according to claim 1, wherein The outer wall of the adjusting link (6) is movably connected to the chuck body (1), and the outer end of the adjusting link (6) is in the shape of an internal hexagonal thread.

4. The machine tool clamp jig according to claim 1, wherein The top end of the second adjusting link (13) is fixedly connected to a limiting block (11), and the inner wall of the limiting block (11) is movably sleeved with two sets of limiting posts (12), and the outer wall of the limiting post (12) is fixedly connected to the inner wall of the claw (2).

5. The machine tool clamp jig according to claim 1, wherein The inner wall of the claw (2) is movably sleeved with a spring (10), and the side of the spring (10) is in contact with the outer wall of the limiting block (11).

6. The machine tool clamp jig according to claim 1, wherein The outer wall of the limiting slide (14) is fitted with a connecting push plate (7), and one end of a spring (8) is fixedly connected to the back of the connecting push plate (7). The other end of the spring (8) is fixedly connected to the inside of the claw (2).

7. The machine tool clamp jig according to claim 1, wherein The chuck body (1) has limit slots (16) on both sides near the jaws (2). The limit slots (16) are in the shape of barbs, and the width of the limit slots (16) is greater than the diameter of the limit slide (14).

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