A centrifugal chuck

Abstract

The utility model provides a centrifugal chuck belongs to the field of machining clamping technology for solving traditional three -jaw chuck needs manual operation in the process of assembling and disassembling, and the technical problem of great labour intensity, low work efficiency. Including: the casing, the outer end center of casing is equipped with the clamping hole, the clamping block, at least two clamping blocks circumferential equidistance array in the outer end surface of casing, each clamping block all with the outer end surface of casing sliding fit, and the sliding direction is along the radial direction of casing, and the clamping lever, the cavity is equipped with in the sliding area of each clamping block in the casing, the clamping lever middle part articulates in the cavity, and one end of clamping lever stretches to the outer end of casing and can push the clamping block sliding, and the other end of clamping lever is equipped with the counterweight pendulum hammer. Have the technical effect that the automatic clamping when lathe starts, the automatic release when lathe stops, reduce the labour intensity, improve the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining clamping technology, specifically to a centrifugal chuck. Background Technology

[0002] In the field of machining, lathes are crucial processing equipment. Their working principle involves the workpiece being fixed in a chuck and rotating at high speed with the spindle, while the cutting tool performs radial cutting to shape the workpiece and its dimensions. In traditional lathe machining, the three-jaw chuck is a commonly used clamping tool, often requiring manual operation to clamp and release the workpiece. During batch processing, the limited speed of manual operation makes it difficult to quickly respond to the production rhythm, resulting in low overall work efficiency and failing to meet the demands of modern large-scale, high-efficiency production. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model proposes a centrifugal chuck to solve the technical problems of traditional three-jaw chucks requiring manual operation for loading and unloading, resulting in high labor intensity and low work efficiency.

[0004] The technical solution adopted in this utility model is: a centrifugal chuck, comprising: The housing has a clamping hole at the center of its outer end. At least two clamping blocks are circumferentially equidistantly arranged on the outer end face of the housing, and each clamping block is slidably engaged with the outer end face of the housing, with the sliding direction along the radial direction of the housing. The housing includes a clamping rod, and a cavity is provided in the housing corresponding to the sliding area of ​​each clamping block. The middle part of the clamping rod is hinged to the cavity. One end of the clamping rod extends to the outer end of the housing and can push the clamping block to slide. The other end of the clamping rod is provided with a counterweight pendulum.

[0005] Optionally, the clamping block includes a slide and a chuck. The slide is fixed to the housing radially along the housing, and the chuck is slidably disposed on the slide. The front end of the chuck is provided with a clamping structure, and the rear end abuts against the clamping rod.

[0006] Optionally, the clamping structure is detachably connected to the chuck; and / or, the clamping structure is a V-shaped block with its open end facing the central clamping hole of the housing.

[0007] Optionally, the slide includes two mirror-arranged guide blocks, with limiting guide grooves on opposite sides of the two guide blocks. The chuck slides in conjunction with the limiting guide grooves, and the tail end of the chuck and the end of the limiting guide groove are connected by an elastic element.

[0008] Optionally, the rear end of the clamping block is provided with a through groove, and one end of the clamping rod extends into the through groove.

[0009] Optionally, the two ends of the clamping rod are connected at an obtuse angle relative to the hinge point, with the obtuse angle opening facing the outer circumference of the housing.

[0010] Optionally, within the cavity of the housing, at least on the inner wall located on one side of the outer perimeter of the housing, a protruding buffer block is provided.

[0011] Optionally, the length from the hinge point of the clamping rod to the outer end of the housing is shorter than the length from the hinge point of the clamping rod to the pendulum.

[0012] Optionally, the counterweight pendulum is spherical; and / or, the clamping rod is integrally cast.

[0013] Optionally, three sets of clamping blocks and clamping rods are equidistant from each other around the circumference.

[0014] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows: Traditional three-jaw chucks require manual operation for loading and unloading, which is labor-intensive and inefficient. This centrifugal chuck, however, rotates at high speed when the lathe is running. The counterweight pendulum, due to centrifugal force, drives the clamping rod, which in turn pushes the clamping blocks to automatically clamp the workpiece. When the lathe stops, the centrifugal force disappears, and the clamping blocks automatically release. The entire process requires no manual intervention, greatly reducing the labor intensity of operators, while enabling rapid loading and unloading, effectively improving production efficiency and meeting the needs of modern production. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall shape.

[0017] Figure 2 This is a frontal view illustration.

[0018] Figure 3 for Figure 2 Schematic diagram of section AA.

[0019] Figure 4 This is a schematic diagram of the clamping rod.

[0020] Figure 5 This is a schematic diagram of the clamping block.

[0021] Figure 6 This is a schematic diagram showing the engagement of the clamping block and the clamping rod.

[0022] Reference numerals: 1. Housing; 11. Buffer block; 2. Clamping block; 21. Slide; 22. Guide block; 221. Limiting guide groove; 23. Clamping head; 24. Elastic element; 25. Clamping structure; 26. Through groove; 3. Clamping rod; 31. Counterweight pendulum. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] A centrifugal chuck, please refer to the appendix. Figure 1 One possible implementation method is as follows: The housing 1 has a clamping hole at the center of its outer end. When clamping, one end of the workpiece is inserted into the clamping hole, and the other end is held in place by the ejector pin mechanism. Clamping blocks 2, at least two clamping blocks 2 are circumferentially equidistantly arranged on the outer end face of the housing 1, and each clamping block 2 is in sliding engagement with the outer end face of the housing 1, with the sliding direction along the radial direction of the housing 1. When clamping is required, the clamping blocks 2 move towards the center along the chuck radius; when loosening is required, they move in the opposite direction. In a preferred embodiment, see Appendix Figure 1 or Figure 2 Three sets of clamping blocks 2 and clamping rods 3 are equidistantly arranged around the circumference. The advantage of the three sets of chucks is that they have a self-centering effect. And clamping rod 3, the housing 1 has a cavity corresponding to the sliding area of ​​each clamping block 2, the middle part of the clamping rod 3 is hinged to the cavity, one end of the clamping rod 3 extends to the outer end of the housing 1 and can push the clamping block 2 to slide, the other end of the clamping rod 3 is provided with a counterweight pendulum 31, the counterweight pendulum 31 has a large mass.

[0026] In the above embodiments, the main working process of this solution is as follows: Initially, clamping rod 3 is in a free state and can rotate around the hinge point; When clamping, insert one end of the workpiece into the clamping hole, and hold the other end in place using the ejector mechanism (built into the lathe); Then start the lathe. Once the lathe reaches the required speed, refer to... Figure 3 and Figure 6 Under the action of centrifugal force, the counterweight pendulum 31 moves along the radial outer periphery of the shell 1, and the entire clamping rod 3 flips around the hinge point. The clamping rod 3 is located at one end outside the shell 1, and the end of the clamping rod 3 flips along the radial center of the shell 1, thereby pushing the clamping block 2 to move along the radial center of the shell 1, so that multiple clamping blocks 2 on the circumference work together to clamp the workpiece. After machining, the lathe speed gradually decreases to stop, the centrifugal force disappears, the clamping rod 3 returns to a free state, and the clamping block 2 can slide freely, losing the clamping force on the workpiece, so the workpiece can be removed and replaced.

[0027] In traditional machining scenarios, loading and unloading workpieces with conventional chucks relies on manual operation, which is labor-intensive and inefficient, making it difficult to meet the needs of large-scale production. This centrifugal chuck, however, offers significant advantages. Through a special structural design, once the lathe is started and the speed reaches the target range, the counterweight pendulum moves radially outward along the outer periphery of the housing under centrifugal force, causing the clamping rod to rotate around the hinge point and push the clamping block towards the center to clamp the workpiece. The entire process is completed automatically without manual intervention. After machining, the lathe stops, the centrifugal force disappears, the clamping rod returns to its free position, the clamping block releases, and the workpiece can be quickly removed and replaced with a new one. This design automatically clamps when the lathe starts and automatically releases when it stops, greatly reducing manual operation and lowering labor intensity. Simultaneously, the speed of loading and unloading workpieces is significantly increased, effectively shortening machining auxiliary time and significantly improving overall machining efficiency.

[0028] In finishing applications, the adaptability of the centrifugal chuck solution becomes even more apparent. During finishing, to achieve higher dimensional accuracy and surface quality, the workpiece typically needs to rotate at a higher speed. Simultaneously, the cutting depth is precisely controlled within a smaller range, significantly reducing the force exerted by the tool on the workpiece. Given these machining characteristics, the required clamping force is also correspondingly reduced. This centrifugal chuck, with its unique design, precisely meets this requirement. It uses centrifugal force to drive the clamping rod, which in turn drives the clamping blocks to clamp the workpiece. Under the lower clamping force requirements of finishing, it ensures stable and reliable clamping while preventing damage to the workpiece due to over-clamping. Furthermore, the automated clamping and releasing mechanism eliminates the need for frequent manual operation, greatly improving the efficiency of workpiece loading and unloading, reducing errors and time losses caused by manual operation, and further optimizing the finishing process.

[0029] In one possible implementation, see Appendix Figure 2The clamping block 2 includes a slide 21 and a chuck 23. The slide 21 is radially fixed to the housing 1, and the chuck 23 is slidably disposed on the slide 21. A clamping structure 25 is provided at the front end of the chuck 23, and the rear end abuts against the clamping rod 3. The rotation of the clamping rod 3 around its hinge point can be converted into a pushing action on the clamping block 2. In a preferred embodiment, the clamping structure 25 is detachably connected to the chuck 23; and / or, the clamping structure 25 is a V-shaped block with its open end facing the central clamping hole of the housing 1. In this embodiment, different clamping structures can be replaced as needed. For example, for workpieces with larger diameters, a clamping structure with a larger V-shaped opening can be replaced; for workpieces with smaller diameters, a longer clamping structure can be replaced; and for workpieces with special shapes, a clamping structure with a specific shape can be replaced, greatly improving the applicability of the chuck.

[0030] In one possible implementation, see [reference] Figure 2 The slide block 21 includes two mirror-arranged guide blocks 22. The two guide blocks 22 are provided with limiting guide grooves 221 on opposite sides. The chuck 23 slides in cooperation with the limiting guide grooves 221. The tail end of the chuck 23 and the end of the limiting guide groove 221 are connected by an elastic element 24 to provide a restoring force for automatic release. When in a non-clamped state, the chuck 23 automatically moves outward and will not block the central clamping hole.

[0031] In one possible implementation, see Appendix Figure 6 The rear end of the clamping block 2 is provided with a through groove 26, and one end of the clamping rod 3 extends into the through groove 26. The clamping rod 3 can drive the clamping block 2 to move in both directions.

[0032] In one possible implementation, see Appendix Figure 6 The clamping rod 3 is connected at both ends at an obtuse angle relative to the hinge point, with the opening of the obtuse angle facing the outer circumference of the housing 1. When rotated, the centrifugal force can create a better outward pulling effect. See appendix. Figure 3 Within the cavity of the housing 1, at least on the inner wall located on one side of the outer perimeter of the housing 1, a protruding buffer block 11, which may be made of rubber, is provided. This is used to limit the maximum outward tilt angle of the clamping rod 3 and prevent rigid impact. Preferably, the length from the hinge point of the clamping rod 3 to the outer end of the housing 1 is shorter than the length from the hinge point of the clamping rod 3 to the pendulum. This creates a lever effect, amplifying the clamping force generated by centrifugal force. The counterweight pendulum 31 is spherical; and / or, the clamping rod 3 is integrally cast.

[0033] In the above embodiments, when the clamping rod 3 flips outward under the action of centrifugal force, the buffer block 11 first contacts the clamping rod 3. Through the elastic deformation of the rubber material, it absorbs part of the impact energy, reduces the noise and vibration generated by rigid impact, and extends the service life of the chuck. At the same time, the obtuse angle design of the clamping rod 3 allows the centrifugal force to act more effectively on the clamping rod 3 during rotation, generating a greater external pulling force, thereby enhancing the clamping effect of the clamping block 2 on the workpiece. The lever effect design, where the length from the hinge point of the clamping rod 3 to the outer end of the housing 1 is shorter than the length from the hinge point of the clamping rod 3 to the pendulum, further amplifies the clamping force generated by the centrifugal force, enabling the chuck to clamp the workpiece more stably during high-speed rotation. The counterweight pendulum 31 adopts a spherical design, which can maintain a stable center of gravity during rotation and reduce vibration caused by center of gravity shift. In addition, the clamping rod 3 is integrally cast, which improves the overall strength and rigidity of the structure, reduces stress concentration and cracks that may be caused by welding and other processing methods, and improves the reliability and safety of the chuck.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A centrifugal chuck, characterized in that, include: The housing (1) has a clamping hole at the center of its outer end; Clamping blocks (2), at least two clamping blocks (2) are circumferentially equidistantly arranged on the outer end face of the housing (1), and each clamping block (2) is slidably engaged with the outer end face of the housing (1), with the sliding direction along the radial direction of the housing (1); And a clamping rod (3), the housing (1) has a cavity corresponding to the sliding area of ​​each clamping block (2), the middle part of the clamping rod (3) is hinged to the cavity, one end of the clamping rod (3) extends to the outer end of the housing (1) and can push the clamping block (2) to slide, and the other end of the clamping rod (3) is provided with a counterweight pendulum (31).

2. A centrifugal chuck as described in claim 1, characterized in that: The clamping block (2) includes a slide (21) and a clamp (23). The slide (21) is fixed radially to the housing (1) along the housing (1). The clamp (23) is slidably disposed on the slide (21). The front end of the clamp (23) is provided with a clamping structure (25), and the rear end abuts against the clamping rod (3).

3. A centrifugal chuck as described in claim 2, characterized in that: The clamping structure (25) is detachably connected to the chuck (23); and / or, the clamping structure (25) is provided with a V-shaped opening with the opening end facing the central clamping hole of the housing (1).

4. A centrifugal chuck as described in claim 2, characterized in that: The slide (21) includes two mirror-arranged guide blocks (22), and the two guide blocks (22) are provided with limiting guide grooves (221) on opposite sides. The chuck (23) slides in cooperation with the limiting guide groove (221), and the tail end of the chuck (23) and the end of the limiting guide groove (221) are connected by an elastic element (24).

5. A centrifugal chuck as described in claim 1, characterized in that: The clamping block (2) has a through groove (26) at its rear end, and one end of the clamping rod (3) extends into the through groove (26).

6. A centrifugal chuck as described in claim 1, characterized in that: The two ends of the clamping rod (3) are connected at an obtuse angle relative to the hinge point, and the obtuse angle opening is directed toward the outer circumference of the housing (1).

7. A centrifugal chuck as described in claim 1, characterized in that: Inside the cavity of the housing (1), at least on the inner wall located on the outer side of the housing (1), there is a protruding buffer block (11).

8. A centrifugal chuck as described in claim 1, characterized in that: The length from the hinge point of the clamping rod (3) to the outer end of the housing (1) is shorter than the length from the hinge point of the clamping rod (3) to the pendulum.

9. A centrifugal chuck as described in claim 1, characterized in that: The counterweight pendulum (31) is spherical; and / or the clamping rod (3) is integrally cast.

10. A centrifugal chuck as described in claim 1, characterized in that: The clamping blocks (2) and clamping rods (3) are arranged in three sets at equal intervals around their circumference.

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