Spinning clamping tool

Abstract

The utility model discloses a spinning clamping tool, which belongs to the technical field of clamping fixtures, and comprises a fixture main body which is integrally of a columnar shaft body structure, one end of the fixture main body is a connecting part, and the other end of the fixture main body is a mounting part; the whole reducing sleeve is of a cylindrical structure, and the reducing sleeve is movably arranged in the mounting part; the spinning nut is arranged on the clamp main body, and the spinning nut is movably connected with the reducing sleeve; wherein the mounting part comprises a mounting head and a mounting hole formed in the mounting head; and the mounting hole is a straight hole and is positioned on the central axis of the mounting head. The variable-diameter sleeve is mounted in the clamp main body by arranging the spinning nut, and the inner cylinder in the variable-diameter sleeve is extruded under the cooperation of the outer cylinder in the variable-diameter sleeve and the mounting hole in the clamp main body, so that a workpiece is clamped. The technical problems that an existing chuck is complex in structure and not high in workpiece clamping force are solved, the adaptability of the device to the working environment is improved, and the technical effect of enhancing the clamping force is achieved.

Description

Technical Field

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

[0002] High-precision clamping technology is achieved through a hydraulic mounting head. Its working principle involves first tightening the pressure bolt, which compresses the hydraulic oil inside the mounting head. This generates high pressure, pushing the hydraulic oil evenly throughout the oil chamber. The thin-walled oil pipes within the chamber contract uniformly due to the increased oil pressure, thus clamping the workpiece inserted into the mounting head's inner hole to the ideal centerline, ultimately achieving accurate clamping and ensuring a circular runout accuracy of 0.003mm at 2.5d. However, due to the complex structure of the hydraulic mounting head and the limitations imposed by the hydraulic oil and the thin-walled oil chamber, its clamping force is not high. Furthermore, during operation, it is easily affected by working conditions, such as temperature changes and centrifugal force, which can cause significant interference with the workpiece. Utility Model Content

[0003] To solve the above problems, this utility model provides a spinning clamp holder, comprising:

[0004] The fixture body is a cylindrical shaft structure, with one end being a connecting part and the other end being a mounting part;

[0005] The variable diameter sleeve has an overall cylindrical structure and is movably disposed within the mounting portion.

[0006] A spun nut is disposed on the fixture body and is movably connected to the variable diameter sleeve;

[0007] The mounting part includes a mounting head and a mounting hole disposed within the mounting head;

[0008] The mounting hole is a straight hole, and the mounting hole is located on the central axis of the mounting head.

[0009] Optionally, the mounting part further includes a positioning groove and a straight positioning block;

[0010] The positioning groove is located inside the mounting hole at the opening away from the mounting hole;

[0011] The straight positioning block is an annular pad, and the straight positioning block is disposed on the mounting head.

[0012] Optionally, the variable diameter sleeve includes:

[0013] The outer cylinder has a tapered cylindrical structure and is also provided with a cylinder head that is adapted to the positioning groove.

[0014] An inner cylinder is disposed inside the outer cylinder, and the inner cylinder is also provided with a plurality of deformation grooves;

[0015] The outer cylinder, by engaging with the mounting hole, compresses the inner cylinder, thereby fixing the workpiece inside the inner cylinder.

[0016] Optionally, the reducing sleeve further includes a flange, which is disposed on the outer cylinder at one end away from the cylinder head, and the flange is fixedly connected to the outer cylinder.

[0017] Optionally, the mounting head is provided with an external thread, and the spinning nut is provided with an internal thread that matches the external thread. The spinning nut is installed on the fixture body by being threadedly connected to the mounting head.

[0018] The spun nut is also provided with a positioning hole that matches the straight positioning block;

[0019] The spun nut is also provided with a guide inner conical hole.

[0020] Optionally, the spun nut is further provided with a hollow groove, and the flange is movably connected to the hollow groove.

[0021] Optionally, the clamp body is further provided with a locking mechanism for fixing the screw-on nut;

[0022] The locking mechanism includes:

[0023] A rotating ring, which is movably sleeved on the mounting head;

[0024] A connecting block, which is fixedly disposed on the edge of the rotating ring;

[0025] Fastening bolts are provided on the connecting block and are threadedly connected to the connecting block;

[0026] A mating block is fixedly disposed on one side of the screw-on nut, and the mating block is provided with a screw hole that is compatible with the fastening bolt.

[0027] By adopting the above technical solution, this utility model mainly has the following technical effects:

[0028] This application uses a spinning nut to install a reducing sleeve inside the fixture body. The outer cylinder of the reducing sleeve engages with the mounting hole in the fixture body, compressing the inner cylinder of the reducing sleeve to clamp the workpiece. This solves the technical problems of existing chucks having complex structures and insufficient workpiece clamping force, improving the device's adaptability to the working environment and enhancing the clamping force. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a spinning clamp holder according to the present invention;

[0030] Figure 2 This is a partial structural diagram of a spinning clamp holder according to the present invention. Figure 1 ;

[0031] Figure 3 This is a partial structural diagram of a spinning clamp holder according to the present invention. Figure 2 ;

[0032] Figure 4 This is a partial structural diagram of a spinning clamp holder according to the present invention. Figure 3 .

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 1. Fixture body; 11. Connecting part; 12. Mounting part; 121. Mounting head; 1211. External thread; 122. Mounting hole; 123. Positioning groove; 124. Straight positioning block;

[0035] 2. Reducing sleeve; 21. Outer cylinder; 211. Cylinder head; 22. Inner cylinder; 221. Deformation groove; 23. Flange;

[0036] 3. Spun nut; 31. Internal thread; 32. Locating hole; 33. Guide inner tapered hole; 34. Empty tool groove;

[0037] 4. Locking mechanism; 41. Rotating ring; 42. Connecting block; 43. Fastening bolt; 44. Mating block. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] Please see Figures 1 to 4As shown, this utility model provides a spinning clamp, which is used to achieve high-precision and strong clamping of workpieces in practical applications. It includes a clamp body 1, a variable diameter sleeve 2 movably disposed in the clamp body 1, and a spinning nut 3 movably connected to the variable diameter sleeve 2.

[0041] Specifically, the fixture body 1 has an overall cylindrical shaft structure, with one end being a tapered shaft, which serves as the connecting part 11, and the other end being a cylindrical shaft, which serves as the mounting part 12. The connecting part 11 is used to connect to a machine tool, thereby allowing the entire fixture body 1 to be mounted on the machine tool. The mounting part 12 is used to mount the reducing sleeve 2 and the twisted nut 3.

[0042] Please see Figure 2 As shown, more specifically, the mounting part 12 includes a mounting head 121 and a mounting hole 122 disposed within the mounting head 121. The mounting hole 122 is a straight hole located on the central axis of the mounting head 121. The end of the mounting hole 122 furthest from the connecting part 11 is an opening. By providing the mounting hole 122, the operator can insert the reducing sleeve 2 into the mounting hole 122 through the opening for installation.

[0043] In some preferred embodiments, the mounting part 12 further includes a positioning groove 123 and a straight positioning block 124 disposed on the mounting head 121. The positioning groove 123 is located inside the mounting hole 122 away from the opening of the mounting hole 122, and assists in positioning the mounting position of the variable diameter sleeve 2 when it is inserted into the mounting hole 122. The straight positioning block 124 is an annular pad, which is fixedly sleeved on the mounting head 121, and is used to position the clamping assembly when the screw nut 3 is connected to the clamp body 1.

[0044] Please see Figure 3As shown, in this embodiment, the variable diameter sleeve 2 has an overall cylindrical structure and is movably disposed within the mounting hole 122. The variable diameter sleeve 2 is adapted to the mounting hole 122, so that the workpiece is fixed within the variable diameter sleeve 2 by the cooperation between the variable diameter sleeve 2 and the mounting hole 122. That is, the workpiece is clamped by inserting the variable diameter sleeve 2 into the mounting hole 122 and by the cooperation between the variable diameter sleeve 2 and the mounting hole 122. The variable diameter sleeve 2 includes an outer cylinder 21 and an inner cylinder 22 disposed within the outer cylinder 21. The outer wall of the outer cylinder 21 gradually increases in thickness from the end into which it is inserted into the mounting hole 122 to the end into which it is inserted into the mounting hole 122, while the thickness of the inner wall of the outer cylinder 21 remains constant. That is, the outer cylinder 21 has a tapered cylinder structure. When the variable diameter sleeve 2 is inserted into the mounting hole 122, the outer wall of the outer cylinder 21 abuts against the wall of the mounting hole 122. Under the constraint of the mounting hole 122, the outer cylinder 21 contracts and deforms towards its axis under the action of the taper, thereby generating a uniform pressure towards the inner cylinder 22, squeezing the inner cylinder 22, thereby generating a clamping force on the workpiece through the inner cylinder 22, and thus clamping the workpiece through the inner cylinder 22.

[0045] In some preferred embodiments, the inner cylinder 22 is further provided with a plurality of gaps, and the plurality of gaps are evenly distributed on the inner cylinder 22. The plurality of gaps are deformation grooves 221. The deformation grooves 221 are used to increase the deformation of the inner cylinder 22 to increase the clamping force on the workpiece. That is, when the workpiece is clamped, the outer cylinder 21 shrinks and deforms, thereby driving the inner cylinder 22 to generate pressure, causing the inner cylinder 22 to deform. At this time, the gaps of the deformation grooves 221 decrease, increasing the contact area between the inner cylinder 22 and the workpiece, thereby providing a tighter clamping force.

[0046] In some preferred embodiments, one end of the outer cylinder 21 is further provided with a cylinder head 211, which is fixedly connected to the outer cylinder 21. The cylinder head 211 is adapted to the positioning groove 123. After the tapered sleeve is inserted into the mounting hole 122, the tapered sleeve is assisted in positioning by the cooperation between the cylinder head 211 and the positioning groove 123.

[0047] In this embodiment, the reducing sleeve 2 further includes a flange 23, which is disposed on the outer cylinder 21 at one end away from the cylinder head 211. The flange 23 is fixedly connected to the outer cylinder 21 and movably connected to the spinning nut 3, thereby allowing the reducing sleeve 2 to be movably connected to the spinning nut 3 through the flange 23.

[0048] Please see Figure 4As shown, in this embodiment, the screw-on nut 3 is an end cap structure, consisting of a cap body and a cap. The mounting head 121 is provided with an external thread 1211, and the cap body of the screw-on nut 3 is provided with an internal thread 31 that matches the external thread 1211. This allows the screw-on nut 3 to be threadedly connected to the mounting head 121 and installed on the clamping assembly body. The screw-on nut 3 and the mounting head 121 are detachably connected. For example, by rotating the screw-on nut 3, the external thread 1211 and the internal thread 31 cooperate to fix the screw-on nut 3 to the mounting head 121. By reversing the screw-on nut 3, the screw-on nut 3 can be quickly removed from the clamping body 1. The cap of the spun nut 3 is also provided with a positioning hole 32 that matches the straight positioning block 124. When the spun nut 3 is connected to the fixture body 1, the straight positioning block 124 and the positioning hole 32 cooperate to assist in positioning the spun nut 3 on the fixture body 1. The cap of the spun nut 3 is also provided with a guide inner conical hole 33, which is located at the center of the cap of the spun nut 3, so that the workpiece is inserted into the reducing sleeve 2 through the guide inner conical hole 33.

[0049] In this embodiment, the spinning nut 3 is also provided with a slot, which is located between the internal thread 31 and the cap. The slot is a cutter groove 34. The flange 23 is movably connected to the cutter groove 34, and the flange 23 is adapted to the internal thread 31. That is, the thickness of the flange 23 is adapted to the pitch of the internal thread 31, so that the flange 23 can be threadedly connected to the internal thread 31. That is, before the reducing sleeve 2 is inserted into the fixture body 1, the flange 23 is screwed into the cutter groove 34 through the internal thread 31 of the spinning nut 3, so that it is disengaged from the internal thread 31 of the spinning nut 3. This allows the flange 23 to rotate and move only within the cutter groove 34, thereby making the reducing sleeve 2 movably connected to the spinning nut 3. The flange 23 has a clamping surface at one end near the cap within the empty tool groove 34, and an abutting surface at the other end. When the screw-on nut 3 rotates on the fixture body 1, the clamping surface of the flange 23 abuts against the empty tool groove 34 of the screw-on nut 3. The cap of the screw-on nut 3 pushes the reducing sleeve 2 to move within the mounting hole 122, thereby clamping the workpiece with the reducing sleeve 2. When it is necessary to release the workpiece, the screw-on nut 3 is reversed, and the abutting surface of the flange 23 abuts against the empty tool groove 34. When the screw-on nut 3 is screwed out from the chuck, the reducing sleeve 2 is pulled out from the mounting hole 122. The reducing sleeve 2 returns to its original shape, allowing the workpiece to be released.

[0050] In this embodiment, due to the possibility of unstable installation of the workpiece, the workpiece may rotate eccentrically under the high-speed rotation of the fixture body 1. This can cause the screw-on nut 3 to loosen under the influence of the workpiece, resulting in the workpiece falling off. To further lock the screw-on nut 3, a locking mechanism 4 is also provided on the fixture body 1. The locking mechanism 4 includes a rotating ring 41, a connecting block 42 connected to the rotating ring 41, and a fastening bolt 43 disposed on the connecting block 42. The rotating ring 41 is movably sleeved on the mounting head 121 of the mounting part 12, meaning that the rotating ring 41 can rotate on the mounting head 121. The connecting block 42 is fixedly disposed on the edge of the rotating ring 41. Rotating the rotating ring 41 moves the connecting block 42. The fastening bolt 43 is disposed on the connecting block 42 and threadedly connected to the connecting block 42, meaning that the fastening bolt 43 can rotate, allowing it to move along its central axis on the connecting block 42. The locking mechanism 4 also includes a mating block 44, which is fixedly disposed in the screw-on nut 3 on one side of the cover. The mating block 44 has a screw hole that matches the fastening bolt 43. That is, after the screw-on nut 3 is connected and fixed to the clamp body 1, the fastening bolt 43 is positioned by rotating the rotating ring 41 and engaging with the screw hole. After the fastening bolt 43 is threadedly connected to the screw hole, the screw-on nut 3 is further fixed to reduce the possibility of loosening.

[0051] Finally, it should be noted that the embodiments disclosed in this utility model are merely preferred embodiments of this utility model and are only used to illustrate the technical solutions of this utility model, 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A spinning clamp, characterized in that, include: The clamp body (1) is a columnar shaft structure with a connecting part (11) at one end and a mounting part (12) at the other end. The variable diameter sleeve (2) has an overall cylindrical structure and is movably disposed within the mounting part (12). A spun nut (3) is disposed on the fixture body (1) and is movably connected to the variable diameter sleeve (2); The mounting part (12) includes a mounting head (121) and a mounting hole (122) disposed in the mounting head (121). The mounting hole (122) is a straight hole, and the mounting hole (122) is located on the central axis of the mounting head (121).

2. The spinning clamp according to claim 1, characterized in that, The mounting part (12) also includes a positioning groove (123) and a straight positioning block (124); The positioning groove (123) is located inside the mounting hole (122) away from the opening of the mounting hole (122); The straight positioning block (124) is an annular pad, and the straight positioning block (124) is disposed on the mounting head (121).

3. A spinning clamp according to claim 2, characterized in that, The reducing sleeve (2) includes: The outer cylinder (21) has a tapered cylinder structure and is also provided with a cylinder head (211) that is adapted to the positioning groove (123). Inner cylinder (22), the inner cylinder (22) is disposed inside the outer cylinder (21), and the inner cylinder (22) is also provided with a plurality of deformation grooves (221). The outer cylinder (21) presses against the inner cylinder (22) by cooperating with the mounting hole (122) to fix the workpiece inside the inner cylinder (22).

4. A spinning clamp according to claim 3, characterized in that, The reducing sleeve (2) also includes a flange (23), which is disposed on the outer cylinder (21) at one end away from the cylinder head (211), and the flange (23) is fixedly connected to the outer cylinder (21).

5. A spinning clamp according to claim 3, characterized in that, The mounting head (121) is provided with an external thread (1211), and the spinning nut (3) is provided with an internal thread (31) that is compatible with the external thread (1211). The spinning nut (3) is installed on the fixture body (1) by being threadedly connected to the mounting head (121). The spinning nut (3) is also provided with a positioning hole (32) that is compatible with the straight positioning block (124). The spinning nut (3) is also provided with a guide inner cone hole (33).

6. A spinning clamp according to claim 4, characterized in that, The spinning nut (3) is also provided with a hollow knife groove (34), and the flange (23) is movably connected to the hollow knife groove (34).

7. A spinning clamp according to claim 1, characterized in that, The clamp body (1) is also provided with a locking mechanism (4) for fixing the screw nut (3); The locking mechanism (4) includes: A rotating ring (41) is movably sleeved on the mounting head (121); A connecting block (42) is fixedly disposed on the edge of the rotating ring (41); Fastening bolt (43), the fastening bolt (43) is disposed on the connecting block (42) and is threadedly connected to the connecting block (42); The mating block (44) is fixedly disposed on one side of the screw-on nut (3), and the mating block (44) is provided with a screw hole that is compatible with the fastening bolt (43).

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