A self-rotating clamp

Abstract

The present invention provides a self-rotating clamp, which relates to the field of clamps, and includes a clamp seat, a clamp body, a rotating mechanism, a limiting mechanism and a power transmission mechanism; the clamp body is rotatably connected to the clamp seat through the rotating mechanism and the clamp body can rotate around its own axis, and a plurality of clamping components for clamping workpieces are arranged inside the clamp body; the limiting mechanisms are at least two and are distributed on the two end faces of the clamp seat, and each of the limiting mechanisms is connected to the clamp seat to prevent the clamp body from axial movement; the power transmission mechanism is connected to any end face of the clamp body, and the power transmission mechanism is used to directly transmit the power of the external power transmission cylinder to the clamp body. It solves the problem of the difficulty of clamp body processing in the prior art.

Description

Technical Field

[0001] The invention relates to the field of clamps, and in particular to a self-rotating clamp. Background Art

[0002] Industrial CT is a precision non-destructive testing equipment that can visually and clearly observe the internal structure and various defects of the workpiece. In order to obtain higher detection accuracy, the workpiece to be inspected needs to be able to perform precise rotational positioning movement; Chinese patent No. CN107283191A discloses a clamping system for large near-cylindrical workpieces, wherein the clamp body can be split into an upper clamp body and a lower clamp body, and the edges of the same side surfaces of the upper clamp body and the lower clamp body are both provided with transmission teeth, and driving teeth meshing with the transmission teeth are provided on the base, and grooves for clamping the clamp body on the base are provided on the outer surface of the clamp body, and the driving teeth drive the clamp body to rotate through the transmission teeth. However, since transmission teeth need to be provided on the edges of the same side surfaces of the upper clamp body and the lower clamp body, and after the upper clamp body and the lower clamp body are assembled, the transmission teeth need to ensure good meshing with the driving teeth on the base, and grooves need to be processed on the outer surfaces of the upper clamp body and the lower clamp body, the processing of the upper clamp body and the lower clamp body is relatively difficult. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a self-rotating clamp, which solves the problem that the clamp body of the horizontal industrial CT equipment in the prior art is difficult to process.

[0004] According to an embodiment of the present invention, a self-rotating clamp comprises a clamp seat, a clamp body, a rotating mechanism, a limiting mechanism and a power transmission mechanism; the clamp body is rotatably connected to the clamp seat through the rotating mechanism and the clamp body can rotate around its own axis, and a plurality of clamping components for clamping workpieces are arranged inside the clamp body; the limiting mechanisms are at least two and are distributed on the two end faces of the clamp seat, and each of the limiting mechanisms is connected to the clamp seat to prevent the clamp body from axial movement; the power transmission mechanism is connected to any end face of the clamp body, and the power transmission mechanism is used to directly transmit the power of the external power transmission cylinder to the clamp body.

[0005] Compared with the prior art, the present invention has the following beneficial effects: by distributing each limiting mechanism on the two end faces of the clamp seat and connecting each limiting mechanism to the clamp seat, each limiting mechanism axially limits the clamp body when it rotates, so that the clamp body will not axially move during the rotation process; by connecting the power transmission mechanism to any end face of the clamp body, the power transmission mechanism can directly transmit the power of the external power transmission cylinder to the clamp body to make the clamp body rotate; therefore, the above scheme is adopted, and each limiting mechanism is used to limit the axis of the clamp body, which replaces the method of machining a groove for clamping and limiting on the clamp body in the prior art, and changes the driving method of driving the clamp body to rotate by gear meshing in the prior art to directly transmitting the power of the external power transmission cylinder to the clamp body by using the power transmission mechanism, thereby avoiding the need to simultaneously machine the groove and the transmission tooth on the clamp body, thereby reducing the difficulty of machining the clamp body.

[0006] Furthermore, each of the limiting mechanisms includes a mounting seat and a third roller, each of the mounting seats is fixedly connected to the end face of the clamp seat, each of the third rollers is rotatably connected to each of the mounting seats and the wheel surface of each of the third rollers is tangent to the end face of the clamp body.

[0007] Furthermore, the power transmission mechanism includes an insert and an annular transmission plate, one end face of the transmission plate is fixedly connected to any end face of the clamp body, the inner ring of the transmission plate is fixedly provided with a flange facing away from the clamp body, and the insert is fixedly provided at one end of the transmission plate facing away from the clamp body.

[0008] Furthermore, the clamp seat includes an upper clamp seat and a lower clamp seat, the upper clamp seat and the lower clamp seat are detachably connected and surround a first annular cavity matching the outer surface of the clamp body, and the clamp body is rotatably connected to the first annular cavity through the rotating mechanism.

[0009] Furthermore, each of the clamping assemblies includes an adjustment mechanism and a clamping block disposed inside the clamping body, each of the clamping blocks is connected to the clamping body via each of the adjustment mechanisms, and each of the adjustment mechanisms is used to adjust the distance between each of the clamping blocks and the workpiece.

[0010] Furthermore, a circular groove is provided in the clamp body, a circular groove is provided in the clamp body, and a circular groove is provided in the clamp body. One end of each clamping block is located in the circular groove and the other end extends toward the center of the clamp body, and a stop block is provided on both sides of each clamping block, one end of each stop block is fixedly connected to the circular groove and the other end is respectively in conflict with each clamping block.

[0011] Furthermore, each of the adjustment mechanisms includes a first screw and a rotating assembly, and a threaded hole is provided on the clamp body along the radial direction of the clamp body. Each of the first screws is threadedly connected in the threaded hole, and one end of the first screw toward the clamp block is rotatably connected to the clamp block through the rotating assembly.

[0012] Furthermore, the rotating assembly includes a second screw, each clamping block is provided with a through hole at one end located in the annular groove and each clamping block is provided with a mounting groove for installing the second screw, the rod of each second screw passes through each through hole and is fixedly connected to the rod of each first screw and the head of each second screw is located in the mounting groove.

[0013] Furthermore, the rotating mechanism includes a first roller and a second roller, each of the first rollers and each of the second rollers are rotatably connected in the clamp seat, the first roller is located at the top of the upper clamp seat and each of the second rollers is located at the bottom of the lower clamp seat, and the first roller and the two second rollers are used to provide three-point support for the clamp body.

[0014] Furthermore, it also includes an adjustment seat, the bottom of the lower clamp seat is connected to the adjustment seat along the axial sliding of the clamp body, and the adjustment seat is provided with a locking mechanism for locking the lower clamp seat along the axial sliding of the clamp body, and the adjustment seat is also provided with a first adjustment mechanism for adjusting the lateral position of the lower clamp seat and a second adjustment mechanism for adjusting the height of the adjustment seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of an embodiment of the present invention;

[0016] Figure 2 for Figure 1 A three-dimensional diagram of a fixture seat;

[0017] Figure 3 for Figure 2 A top view of

[0018] Figure 4 for Figure 3 AA direction cross-sectional view;

[0019] Figure 5 for Figure 1 The concrete three-dimensional Figure 1 ;

[0020] Figure 6 for Figure 1 The concrete three-dimensional Figure 2 ;

[0021] Figure 7 for Figure 6 A front view of a clamping concrete;

[0022] Figure 8 for Figure 5 Right view of;

[0023] Fig. 9 for Figure 6 A top view of

[0024] Fig.10 for Fig. 9 BB direction cross-sectional view;

[0025] Fig.11 for Fig. 9 CC direction cross-sectional view;

[0026] Fig.12 for Fig.11 A partial enlarged view of point A.

[0027] In the above drawings: 1, upper clamp seat; 2, lower clamp seat; 3, upper clamp body; 4, lower clamp body; 5, first screw; 6, first roller; 7, second roller; 8, clamping block; 9, stopper; 10, first screw; 11, screw sleeve; 12, second screw; 13, mounting seat; 14, third roller; 15, transmission plate; 16, insert; 17, adjustment seat; 18, sliding plate; 19, T-bolt; 20, T-groove; 21, third screw; 22, protrusion; 23, pad; 24, ear seat; 25, pin bolt; 26, bushing; 27, sleeve; 28, second screw; 29, lifting ear. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a self-rotating clamp, including a clamp seat, a clamp body, a rotating mechanism, a limiting mechanism and a power transmission mechanism; in order to facilitate the installation of the workpiece in the clamp body, the clamp body includes an upper clamp body 3 and a lower clamp body 4, both of which are semi-annular, and the upper clamp body 3 and the lower clamp body 4 are detachably connected and surround a second annular cavity for the workpiece to pass through, and the clamp body is rotatably connected to the clamp seat through a rotating mechanism and the clamp body can rotate around its own axis, such as Figure 7 and Figure 8 As shown, ear seats 24 for connection are fixedly provided on both end surfaces of the upper clamp body 3 and the lower clamp body 4. Figure 6 and Fig. 9As shown, in order to ensure the accuracy of the upper clamp body 3 and the lower clamp body 4 after being fastened, the upper clamp body 3 and the lower clamp body 4 are fastened at four points, two points on one diagonal are connected by ordinary bolts, and the two points on the other diagonal are connected by column bolts 25; during the docking and fastening process of the upper clamp body 3 and the lower clamp body 4, the accurate fastening of the two can be ensured by the guide pins installed on the lower clamp body 4 and the positioning holes on the upper clamp body 3. The specific setting method of the guide pins is a conventional technical means in the field and will not be repeated here; Fig. 9 and Fig.10 As shown, in order to reduce the need to directly machine high-precision mounting holes on the upper clamp body 3 and the lower clamp body 4 and to facilitate maintenance and replacement, a bushing 26 is embedded in the ear seat 24 connected by a pin bolt 25, and the pin bolt 25 is transitionally matched with the inner hole of the bushing 26; due to the transitional fit between the bushing 26 and the pin bolt 25, in order to facilitate the removal of the pin bolt 25 from the bushing 26, a pin puller is fixedly provided at the top of the ear seat 24 connected by the pin bolt 25 and located on the upper clamp body 3, each of the pin pullers includes a vertical sleeve 27 and a second screw rod 28, each of the sleeves 27 is vertically fixed on each of the ear seats 24, one end of each of the second screw rods 28 extends into each of the sleeves 27 and is fixedly connected to one end of each of the pin bolts 25, and the other end of each of the second screw rods 28 is connected with a nut, and each of the second screw rods 28 is connected to each of the The sleeve 27 is threadedly connected; when it is necessary to pull out the pin bolt 25, the nut on the pin bolt 25 is removed, and then the nut on the second screw rod 28 is screwed in. Since the nut on the second screw rod 28 cannot continue to be screwed in, the second screw rod 28 is then screwed out upward until the second screw rod 28 pulls the pin bolt 25 out of the bushing 26; a plurality of clamping assemblies for clamping the workpiece are provided in the clamp body; there are at least two limiting mechanisms and they are distributed on the two end faces of the clamp seat, and each of the limiting mechanisms is connected to the clamp seat to prevent the axial movement of the clamp body; the power transmission mechanism is connected to any end face of the clamp body, and the power transmission mechanism is used to directly transmit the power of the external power transmission cylinder to the clamp body. In order to facilitate the lifting of the clamp seat, a lifting ear 29 for lifting is fixed on the top of the clamp seat.

[0030] By distributing each limiting mechanism on the two end faces of the clamp seat and connecting each limiting mechanism to the clamp seat, each limiting mechanism axially limits the clamp body when it rotates, so that the clamp body will not axially move during the rotation process; by connecting the power transmission mechanism to any end face of the clamp body, the power transmission mechanism can directly transmit the power of the external power transmission cylinder to the clamp body to make the clamp body rotate; therefore, the above scheme is adopted, and each limiting mechanism is used to limit the axis of the clamp body, which replaces the method of machining a groove for clamping and limiting on the clamp body in the prior art, and changes the driving method of driving the clamp body to rotate by gear meshing in the prior art to directly transmitting the power of the external power transmission cylinder to the clamp body by using the power transmission mechanism, thereby avoiding the need to simultaneously machine the groove and the transmission tooth on the clamp body, thereby reducing the difficulty of machining the clamp body.

[0031] like Figure 2 and Figure 3 As shown, according to another embodiment of the present invention, each of the limiting mechanisms includes a mounting seat 13 and a third roller 14, each of the mounting seats 13 is fixedly connected to the end face of the clamp seat, each of the third rollers 14 is rotatably connected to each of the mounting seats 13, and the wheel surface of each of the third rollers 14 is tangent to the end face of the clamp body respectively; by adopting the above scheme, each of the third rollers 14 in contact with the two end faces of the clamp body realizes axial limiting of the clamp body, and during the rotation of the clamp body, its end face rolls with each of the third rollers 14, and the friction resistance is small; in order to improve the axial limiting effect of the clamp body, the number of the limiting mechanisms is four and they are symmetrically distributed on the two end faces of the clamp seat in groups of two.

[0032] like Figure 1 and Figure 5 As shown, according to another embodiment of the present invention, the number of the power transmission mechanisms is two and they are respectively arranged on the upper clamping body 3 and the lower clamping body 4, the power transmission mechanism includes an insert 16 and an annular transmission disc 15, one end face of the transmission disc 15 is fixedly connected to any end face of the clamping body, the inner ring of the transmission disc 15 is fixedly provided with a flange away from the clamping body and the inner ring diameter of the transmission disc 15 is equal to the inner ring diameter of the clamping body, the insert 16 is fixedly arranged at the end of the transmission disc 15 away from the clamping body; when in use, the power transmission mechanism is plugged into the joint end of the external power transmission cylinder, the flange is used to prevent flexural deformation during the rotation of the external power transmission cylinder, the insert 16 is used to clamp with the power transmission cylinder and then directly transmit power to the clamping body (similar to a locating pin), the external power transmission cylinder is a conventional device, and its specific structure is not repeated here.

[0033] like Figure 1 and Figure 2As shown, according to another embodiment of the present invention, the clamp seat includes an upper clamp seat 1 and a lower clamp seat 2, the upper clamp seat 1 and the lower clamp seat 2 are detachably connected and surround a first annular cavity matching the outer surface of the clamp body, the clamp body is rotatably connected in the first annular cavity through the rotating mechanism; the clamp body is completely rotatably connected in the clamp seat, the clamp seat limits the clamp body, the radial runout of the clamp body during the rotation process is reduced, and the rotation of the clamp body is more stable; the detachably connected upper clamp seat 1 and the lower clamp seat 2 make the disassembly and assembly of the clamp body and the clamp seat more convenient.

[0034] like Figure 1 and Figure 5 As shown, according to another embodiment of the present invention, the clamping assembly includes an adjusting mechanism and a clamping block 8 arranged inside the clamping body, the clamping block 8 is connected to the clamping body through the adjusting mechanism, and the adjusting mechanism is used to adjust the distance between the clamping block 8 and the clamped object. Preferably, the number of the clamping mechanisms is four and they are evenly distributed in the clamping body; by adopting the above scheme, the distance between the clamping block 8 and the workpiece can be adjusted by the adjusting mechanism, thereby realizing the adjustment of the clamping force of the workpiece and being able to adapt to workpieces of different diameters.

[0035] like Figure 5 and Figure 6 As shown, according to another embodiment of the present invention, an annular groove is provided in the clamping body, one end of the clamping block 8 is located in the annular groove and the other end extends toward the center of the clamping body, and stop blocks 9 are respectively provided on both sides of the clamping block 8, one end of each stop block 9 is fixedly connected to the annular groove and the other end is respectively in contact with the clamping block 8; by adopting the above scheme, the stop blocks 9 located at both ends of the clamping block 8 clamp and limit the clamping block 8, and the annular groove limits the clamping block 8, so that the clamping block 8 is more stable when clamping the workpiece and is not easy to shake.

[0036] like Fig. 9 , Fig.11 and Fig.12 As shown, according to another embodiment of the present invention, in order to achieve an adjustable distance between the clamping block 8 and the workpiece, each of the adjusting mechanisms includes a first screw 10 and a rotating assembly, and a threaded hole is provided on the clamping body along the radial direction of the clamping body, and each of the first screws 10 is threadedly connected in the threaded hole, and one end of the first screw 10 facing the clamping block 8 is rotatably connected to the clamping block 8 through the rotating assembly.

[0037] like Fig. 9 , Fig.11 and Fig.12As shown, according to another embodiment of the present invention, the rotating assembly includes a second screw 12, the rod of the first screw 10 is connected with a screw sleeve 11, the outer surfaces of the first screw 10 and the screw sleeve 11 are fully threaded and the first screw 10 and the screw sleeve 11 are threadedly connected to the threaded hole, the end of the rod of the first screw 10 away from the head is provided with a hexagonal head, the screw sleeve 11 is provided with a hexagonal groove at one end facing the first screw 10, the hexagonal head of the first screw 10 is embedded in the hexagonal groove of the screw sleeve 11 and the first screw 10 and the screw sleeve 11 are fixedly connected. To facilitate the installation of the second screw 12, the end of the clamping block 8 located in the annular groove is provided with a through hole and the clamping block 8 is provided with an installation groove along the axial direction of the clamping concrete, the rod of the second screw 12 passes through the through hole and is fixedly connected to the end of the screw sleeve 11 away from the first screw 10, the head of the second screw 12 is located in the installation groove, and to facilitate the push of the screw sleeve 11 The clamping block 8 is more stable during the process of entering the clamping block 8. The end of the screw sleeve 11 away from the first screw 10 is set to an arc-shaped dome, and the end of the clamping block 8 located in the annular groove is provided with a groove matching the dome. The dome is located in the groove of the clamping block 8 to enable the operator to screw in the first screw 10. During the process of the first screw 10 driving the screw sleeve 11 to screw in, the dome of the screw sleeve 11 rotates in the groove in the clamping block 8 and lifts the clamping block 8 toward the center of the clamping concrete, thereby adjusting the distance between the clamping block 8 and the workpiece. Similarly, the first screw 10 is unscrewed in the opposite direction, and the first screw 10 drives the screw sleeve 11 to be unscrewed, and the screw sleeve 11 pulls the clamping block 8 through the second screw 12 to keep the clamping block 8 away from the workpiece; preferably, it should be understood that the second screw 12 and the screw sleeve 11 can be integrated, that is, the rod of each of the second screws 12 passes through each of the through holes and is fixedly connected to the rod of each of the first screws 10 and the head of each of the second screws 12 is located in the mounting groove.

[0038] like Figure 1 , Figure 2 and Figure 4As shown, according to another embodiment of the present invention, the rotating mechanism includes a first roller 6 and two second rollers 7, the first roller 6 is located at the top of the clamp seat and is rotatably connected to the clamp seat. In order to achieve an adjustable distance between the first roller 6 and the workpiece, the top of the upper clamp seat 1 is vertically threaded with a first screw 5, one end of the first screw 5 penetrates into the interior of the upper clamp seat 1 and is rotatably connected to the first roller 6. In order to reduce the friction between the first roller 6 and the workpiece, the first roller 6 is preferably a universal ball wheel. In order to improve the clamping effect of the first roller 6 on the workpiece, the number of the first screw 5 and the first roller 6 is preferably two. The specific method for realizing the rotational connection between the first roller 6 and the first screw 5 is a conventional technical means in the field and will not be described here. To be repeated; a cavity for installing each second roller 7 is provided at the bottom of the lower clamp seat 2, and each second roller 7 is rotatably connected in the cavity. The specific implementation method of each second roller 7 and the lower clamp seat 2 to achieve rotational connection is a conventional technical means in the field and will not be repeated here; to ensure that the first roller 6 and the two second rollers 7 are used to support the clamp body at three points, a part of each second roller 7 should extend out of the cavity, and the rotation axis of the first roller 6 and each second roller 7 is parallel to the axis of the clamp body. It should be understood that the number of rollers of the rotating mechanism should be understood as achieving at least three-point support for the clamp body and should not be restrictively understood as only three-point support; by adopting the above technical scheme, the rotating mechanism has a simple structure, is easy to implement and has stable clamping.

[0039] like Figure 1As shown, according to another embodiment of the present invention, during use, in order to facilitate the adjustment of the axis of the clamp body to be coaxial with the external power transmission cylinder, an adjustment seat 17 is further provided, and a sliding plate 18 is fixedly provided at the bottom of the lower clamp seat 2, and the sliding plate 18 is slidably connected to the adjustment seat 17 along the axial direction of the clamp body, and the adjustment seat 17 is provided with a locking mechanism for locking the sliding of the sliding plate 18, and the adjustment seat 17 is also provided with a first adjustment mechanism for adjusting the lateral position of the sliding plate 18 and a second adjustment mechanism for adjusting the height of the adjustment seat 17. The sliding plate 18 includes a lower horizontal section and bent sections at both ends of the lower horizontal section that are bent upward, and one end of each bent section that is away from the horizontal section is bent outward to form an upper horizontal section. The top of the adjustment seat 17 is fixed with two protrusions 22 parallel to the axial direction of the clamp body. The bottom end of each upper horizontal section abuts against the top of each protrusion 22 and is slidably connected to each protrusion 22. A gap is left between each bent section and each protrusion 22 for adjusting the lateral position of the sliding plate 18. The first adjustment mechanism includes a plurality of third screws 21, a plurality of third screws 21 are transversely threadedly connected to both sides of the adjustment seat 17, and the ends of the rods of the third screws 21 facing away from the heads are respectively in conflict with the bending sections, the lower horizontal section and the side of the adjustment seat 17 facing the lower horizontal section are respectively provided with openings and T-shaped grooves 20, the lower horizontal section and the adjustment seat 17 are connected by T-bolts 19, that is, the heads of the T-bolts 19 are located in the T-shaped grooves 20 and the rods pass through the openings and are locked by bolts, and the bottom of the adjustment seat 17 is connected by bolts with a The pad 23 at the height of the adjustment seat 17; when the clamp seat needs to be adjusted axially along the clamp body, loosen the T-bolt 19, adjust it to the appropriate position and then tighten the T-bolt 19. When the position of the clamp seat relative to the adjustment seat 17 needs to be fine-tuned laterally, the operator screws in or out the third screws 21 on both sides of the adjustment seat 17. The multiple third screws 21 on both sides of the adjustment seat 17 cooperate with each other to achieve fine-tuning of the lateral position of the clamp seat (loosen the third screw 21 on the same side of the adjustment seat 17 and tighten the third screw 21 on the other side of the adjustment seat 17).

[0040] The working process of the present invention is: first, the lower clamp body 4 is installed in the lower clamp seat 2, and then the workpiece is installed in the lower clamp body 4, and then the upper clamp body 3 is installed on the lower clamp body 4. The four clamping blocks 8 in the upper clamp body 3 and the lower clamp body 4 realize four-point clamping of the workpiece, and the upper clamp seat 1 is hoisted on the lower clamp seat 2 through the lifting ear 29. The upper clamp seat 1 presses the clamp body into the lower clamp seat 2, and the first roller 6 and the second roller 7 in the clamp seat realize three-point support for the clamp body. The clamp body can then rotate around its own axis in the clamp seat. Finally, the transmission disk 15 fixed on the clamp body is connected to the power transmission cylinder, and the rotational power of the power transmission cylinder is directly transmitted to the clamp body through the transmission disk 15 and the embedded block 16, thereby driving the clamp body to rotate around its own axis.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A self-rotating clamp, characterized in that: The invention comprises a clamp seat, a clamp body, a rotation mechanism, a limit mechanism and a power transmission mechanism; the clamp body is rotatably connected to the clamp seat through the rotation mechanism and the clamp body can rotate around its own axis, and a plurality of clamping assemblies for clamping workpieces are arranged in the clamp body; there are at least two limit mechanisms and they are distributed on the two end faces of the clamp seat, and each of the limit mechanisms is connected to the clamp seat to prevent the clamp body from axial movement; the power transmission mechanism is connected to any end face of the clamp body, and the power transmission mechanism is used to directly transmit the power of the external power transmission cylinder to the clamp body; Each of the limiting mechanisms comprises a mounting seat (13) and a third roller (14); each of the mounting seats (13) is fixedly connected to an end surface of the clamp seat, each of the third rollers (14) is rotatably connected to each of the mounting seats (13), and a wheel surface of each of the third rollers (14) is tangent to an end surface of the clamp body; The power transmission mechanism comprises an insert (16) and an annular transmission disc (15), one end face of the transmission disc (15) being fixedly connected to any end face of the clamp body, the inner ring of the transmission disc (15) being fixedly provided with a flange facing away from the clamp body, and the insert (16) being fixedly provided at one end of the transmission disc (15) facing away from the clamp body; The clamp seat comprises an upper clamp seat (1) and a lower clamp seat (2), wherein the upper clamp seat (1) and the lower clamp seat (2) are detachably connected and enclose a first annular cavity matching the outer surface of the clamp body, and the clamp body is rotatably connected to the first annular cavity via the rotating mechanism; The rotating mechanism comprises a first roller (6) and two second rollers (7); the first roller (6) and each of the second rollers (7) are rotatably connected in the clamp seat; the first roller (6) is located at the top of the upper clamp seat (1) and each of the second rollers (7) is located at the bottom of the lower clamp seat (2); the first roller (6) and the two second rollers (7) are used to provide three-point support for the clamp body.

2. A self-rotating clamp as claimed in claim 1, characterized in that: Each of the clamping assemblies comprises an adjustment mechanism and a clamping block (8) arranged inside the clamping body; each of the clamping blocks (8) is connected to the clamping body via the adjustment mechanism; and each of the adjustment mechanisms is used to adjust the distance between each of the clamping blocks (8) and the workpiece.

3. A self-rotating clamp as claimed in claim 2, characterized in that: A circular groove is provided in the clamp body, one end of each clamping block (8) is located in the circular groove and the other end extends toward the center of the clamp body, and a stopper (9) is provided on both sides of each clamping block (8), one end of each stopper (9) is fixedly connected to the circular groove and the other end is in contact with each clamping block (8).

4. A self-rotating clamp as claimed in claim 3, characterized in that: Each of the adjustment mechanisms comprises a first screw (10) and a rotating assembly, a threaded hole is provided on the clamp body along the radial direction of the clamp body, each of the first screws (10) is threadedly connected in the threaded hole, and one end of the first screw (10) facing the clamp block (8) is rotatably connected to the clamp block (8) through the rotating assembly.

5. A self-rotating clamp as claimed in claim 4, characterized in that: The rotating assembly comprises a second screw (12), one end of each clamping block (8) located in the annular groove is provided with a through hole and each clamping block (8) is provided with a mounting groove for mounting the second screw (12), the rod portion of each second screw (12) passes through each through hole and is fixedly connected to the rod portion of each first screw (10), and the head portion of each second screw (12) is located in the mounting groove.

6. A self-rotating clamp as claimed in claim 1, characterized in that: The utility model further comprises an adjusting seat (17), wherein the bottom of the lower clamp seat (2) is connected to the adjusting seat (17) in an axially sliding manner along the clamp body, and the adjusting seat (17) is provided with a locking mechanism for locking the lower clamp seat (2) from sliding along the axial direction of the clamp body, and the adjusting seat (17) is also provided with a first adjusting mechanism for adjusting the lateral position of the lower clamp seat (2) and a second adjusting mechanism for adjusting the height of the adjusting seat (17).

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