Torsion head device

Abstract

The utility model discloses a head twisting device which comprises a rack, a limiting device, a driving device, a plurality of rotating discs and a plurality of sleeve shafts. Wherein the rotating discs are sequentially arranged in a stacked mode from bottom to top, the rotating discs are rotationally arranged on the rotating discs below the rotating discs, the lowest rotating disc is rotationally arranged on the rack, the sleeve shafts correspond to the rotating discs one to one, and the lower ends of the sleeve shafts are connected to the inner circumferential portions of the corresponding rotating discs. The multiple sleeve shafts are sequentially arranged in a stacked and sleeved mode from inside to outside in the radial direction of the rotary disc, an annular gap is formed between every two adjacent sleeve shafts, and the limiting device comprises a plurality of limiting mechanisms which are connected to the rack and sequentially distributed in the circumferential direction of the rotary disc. Friction resistance borne by the sleeve shafts during rotation can be reduced, so that energy consumption can be reduced, contact abrasion of the adjacent sleeve shafts can be prevented, reduction of matching precision of the sleeve shafts can be avoided, and the service life of the sleeve shafts can be prolonged.

Description

Technical Field

[0001] The utility model relates to a head twisting device. Background Art

[0002] Currently, the twisting operation involves twisting and adjusting the ends of stator windings to achieve a specific shape and position. A twisting device is a device used to precisely and efficiently perform this stator winding twisting operation. The twisting device includes multiple sleeve shafts stacked one on top of the other, each independently rotatable. In existing twisting devices, adjacent sleeve shafts are typically assembled in a contact-fit manner. For example, Chinese Patent Publication No. CN217282605U discloses a multi-layer twisting device. The adapter sleeves in this multi-layer twisting device are equivalent to the sleeve shafts, and adjacent adapter sleeves in this multi-layer twisting device are in a contact-fit manner.

[0003] The contact-fit assembly method between adjacent sleeve shafts results in excessive friction between the sleeve shafts, which in turn hinders the sleeve shafts' rotation. Currently, some companies add lubricating oil between the sleeve shafts to provide a certain lubricating effect. However, during use, it has been found that the lubricating effect of lubricating oil is very limited. The friction between adjacent sleeve shafts is still large, which still hinders the sleeve shafts' rotation and leads to increased energy consumption. It also causes wear between the sleeve shafts, which in turn affects the sleeve shafts' fitting accuracy and service life. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and provide a twisting head device, which can reduce the friction resistance encountered by the sleeve shaft during rotation and thus reduce energy consumption, and can also prevent contact wear of adjacent sleeve shafts, thereby avoiding a reduction in the fitting accuracy of the sleeve shaft and extending the service life of the sleeve shaft.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a head twisting device, which includes:

[0006] frame;

[0007] A plurality of turntables, the turntables are stacked in sequence from bottom to top, the turntables are rotatably arranged on the turntables below them, and the bottom turntable is rotatably arranged on the frame;

[0008] A plurality of sleeve shafts, each corresponding to the turntable, wherein the lower end of each sleeve shaft is connected to the inner circumference of the corresponding turntable, and the plurality of sleeve shafts are stacked and arranged in sequence from the inside to the outside along the radial direction of the turntable, with an annular gap being provided between adjacent sleeve shafts;

[0009] A limiting device, the limiting device comprising a plurality of limiting mechanisms connected to the frame and distributed in sequence along the circumference of the turntable, the limiting mechanisms being provided with limiting rotating components corresponding to the turntables, the limiting rotating components abutting against the outer side walls of the corresponding turntables to centrally position the turntables;

[0010] A driving device is connected to the turntable and is used to drive the turntable to rotate independently.

[0011] Furthermore, the twisting device also includes a twisting wire drum corresponding to the sleeve shaft one by one, the twisting wire drum is connected to the upper end of the corresponding sleeve shaft, and a wire groove is provided in the twisting wire drum.

[0012] Furthermore, planar thrust bearings are provided between adjacent turntables so that the adjacent turntables can rotate independently.

[0013] A plane thrust bearing is also provided between the lowermost turntable and the frame so that the lowermost turntable can be rotated on the frame;

[0014] The lower end of the lowermost turntable is further provided with a downwardly protruding connecting ring, and the connecting ring is rotatably connected to the frame through a radial bearing.

[0015] Furthermore, the frame is connected to at least one pressure wheel for pressing the upper end surface of the uppermost turntable.

[0016] Furthermore, the lower end portion of the sleeve shaft is provided with a supporting ring protruding radially outward and at least one limiting portion protruding axially downward;

[0017] A supporting portion for supporting the supporting ring on the corresponding sleeve shaft and a limiting groove for the limiting portion on the corresponding sleeve shaft to be clamped are provided on the inner circumference of the turntable.

[0018] In order to further center the upper end of the sleeve shaft, a centering sleeve is provided between the upper end portions of adjacent sleeve shafts and between the outermost sleeve shaft and the frame.

[0019] Further providing a specific structure of the limiting mechanism, the limiting mechanism includes an eccentric shaft, an adjustment assembly and the limiting rotating parts corresponding to the rotating disks one by one;

[0020] The eccentric shaft is eccentrically rotatably connected to the frame;

[0021] The limiting rotation components are sequentially connected to the eccentric shaft from top to bottom, and the limiting rotation components are aligned with the corresponding turntables;

[0022] The adjusting assembly is connected to the frame and to the eccentric shaft. The adjusting assembly is used to drive the eccentric shaft to rotate and then drive the limiting rotation component on the eccentric shaft to rotate until it abuts against the outer side wall of the corresponding turntable.

[0023] Further providing a specific structure of the frame, the frame includes a main frame and a positioning base, the positioning base is connected to the main frame;

[0024] The lowermost turntable is rotatably arranged on the positioning base, the eccentric shaft is eccentrically rotatably connected to the main frame, and the adjustment component is connected to the main frame and connected to the eccentric shaft;

[0025] The limiting mechanism also includes a reference rotating component connected to the eccentric shaft and aligned with the positioning base. When the adjusting assembly drives the eccentric shaft to rotate and then drives the reference rotating component to rotate until it abuts against the outer wall of the positioning base, all the limiting rotating components respectively abut against the outer wall of the corresponding turntable.

[0026] Further providing a specific structure of the adjustment assembly, the adjustment assembly includes an adjustment plate, a first adjustment head, a second adjustment head and an adjustment screw;

[0027] One end of the adjusting screw is provided with a first threaded portion threadedly connected to the first adjusting head, and the other end of the adjusting screw is provided with a second threaded portion threadedly connected to the second adjusting head, wherein the first threaded portion and the second threaded portion have opposite rotation directions;

[0028] The first adjusting head is rotatably connected to the main frame,

[0029] The second adjusting head is rotatably connected to the adjusting plate.

[0030] One end portion of the adjusting plate is connected to the eccentric shaft.

[0031] Further providing a specific structure of the main frame, the main frame includes a top plate, a bottom plate and a plurality of columns;

[0032] The lower end of the column is connected to the bottom plate, and the top plate is connected to the upper end of the column;

[0033] The positioning base is connected to the base plate;

[0034] The eccentric shaft includes an upper connecting shaft segment, a lower connecting shaft segment and an eccentric mounting portion located between the upper connecting shaft segment and the lower connecting shaft segment, the upper connecting shaft segment is rotatably connected to the top plate, the lower connecting shaft segment is rotatably connected to the bottom plate, and the limiting rotation component and the reference rotation component are both connected to the eccentric mounting portion;

[0035] Wherein, the position-limiting rotating component and the reference rotating component are both bearings.

[0036] After adopting the above technical solution, each of the turntables can rotate independently, thereby driving each of the sleeve shafts to rotate independently; wherein, setting an annular gap between adjacent sleeve shafts can prevent adjacent sleeve shafts from contacting each other, thereby reducing the friction resistance encountered by the sleeve shafts during rotation, thereby reducing the energy consumption required to drive the sleeve shafts to rotate, and also avoiding contact wear between adjacent sleeve shafts during rotation, thereby avoiding a reduction in the fitting accuracy of the sleeve shafts and extending the service life of the sleeve shafts. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional diagram of the head-twisting device of the present invention;

[0038] Figure 2 This is a top view of the head twisting device of the present invention;

[0039] Figure 3 for Figure 2 AA section view;

[0040] Figure 4 for Figure 2 BB cross-sectional view;

[0041] Figure 5 This is a schematic structural diagram of the turntable and sleeve shaft of the present utility model;

[0042] Figure 6 This is a schematic structural diagram of the limiting mechanism of the present utility model;

[0043] Figure 7 It is a structural schematic diagram of the eccentric shaft and the limiting rotation component of the utility model. DETAILED DESCRIPTION

[0044] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0045] like Figures 1 to 7 As shown, a head-twisting device comprises:

[0046] Rack 100;

[0047] Multiple turntables 1, the turntables 1 are stacked in sequence from bottom to top, the turntable 1 is rotatably arranged on the turntable 1 below it, and the bottom turntable 1 is rotatably arranged on the frame 100;

[0048] a plurality of sleeve shafts 2, each corresponding to the turntable 1 on a one-to-one basis, with the lower end of each sleeve shaft 2 connected to the inner circumference of the corresponding turntable 1; the plurality of sleeve shafts 2 are stacked and arranged in sequence from the inside to the outside along the radial direction of the turntable 1, with an annular gap 3 provided between adjacent sleeve shafts 2;

[0049] A limiting device, comprising a plurality of limiting mechanisms 200 connected to the frame 100 and distributed sequentially along the circumference of the turntable 1, wherein the limiting mechanisms 200 are provided with limiting rotating components 4 corresponding to the turntable 1, and the limiting rotating components 4 abut against the outer side walls of the corresponding turntable 1 to center the turntable 1, thereby preventing the turntable 1 from being eccentric during rotation;

[0050] A driving device is connected to the turntable 1 and is used to drive the turntable 1 to rotate independently.

[0051] Specifically, each of the turntables 1 can rotate independently, thereby driving each of the sleeve shafts 2 to rotate independently; wherein, the annular gap 3 provided between adjacent sleeve shafts 2 can prevent adjacent sleeve shafts 2 from contacting each other, thereby reducing the friction resistance encountered by the sleeve shafts 2 during rotation, thereby reducing the energy consumption required to drive the sleeve shafts 2 to rotate, and also avoiding contact wear between adjacent sleeve shafts 2 during rotation, thereby avoiding a reduction in the fitting accuracy of the sleeve shafts 2 and extending the service life of the sleeve shafts 2.

[0052] Specifically, the twisting device may further include a twisting reel (not shown in the figure) corresponding to the sleeve shaft 2, the twisting reel being connected to the upper end portion of the corresponding sleeve shaft 2, and a wire groove being provided in the twisting reel. Specifically, the driving device drives the turntable 1 to rotate, thereby driving the sleeve shaft 2 to rotate, thereby driving the twisting reel to rotate, thereby driving the end portion of the stator winding to torsional deformation. In this embodiment, the turntable 1 and the sleeve shaft 2 are separate, and the sleeve shaft 2 and the twisting reel are separate, thereby facilitating the replacement of the turntable 1, the sleeve shaft 2 and the twisting reel, and also enabling lower processing costs. Among them, the twisting reel is also called a twisting mold, and the specific structure of the twisting reel is a prior art well known to those skilled in the art, and will not be described in detail in this embodiment.

[0053] like Figure 3 、 4 As shown, a plane thrust bearing 5 is provided between adjacent turntables 1 so that the adjacent turntables 1 can rotate independently;

[0054] A planar thrust bearing 5 is also provided between the bottom turntable 1 and the frame 100 to enable the bottom turntable 1 to be rotatably arranged on the frame 100;

[0055] The lower end of the lowest turntable 1 is also provided with a downwardly protruding connecting ring 6, and the connecting ring 6 is rotatably connected to the frame 100 through a radial bearing 7; specifically, a retaining ring 8 is also provided on the outer side of the planar thrust bearing 5, and the retaining ring 8 is connected to the corresponding turntable 1 and is used to limit the planar thrust bearing 5.

[0056] like Figure 4 As shown, the frame 100 is connected to at least one pressing wheel 9 for pressing the upper end surface of the uppermost turntable 1; in this embodiment, there are four pressing wheels 9 evenly distributed along the circumference.

[0057] like Figures 3-5 As shown, the lower end portion of the sleeve shaft 2 is provided with a supporting ring 10 protruding radially outward and at least one limiting portion 11 protruding axially downward;

[0058] The inner circumference of the turntable 1 is provided with a supporting portion 12 for supporting the supporting ring 10 on the corresponding sleeve shaft 2 and a limiting groove 13 for the corresponding limiting portion 11 on the sleeve shaft 2 to be snapped into; specifically, the sleeve shaft 2 and the corresponding turntable 1 are also locked and connected by fasteners.

[0059] like Figure 3 、 4 As shown, centering sleeves 14 are respectively provided between the upper ends of adjacent sleeve shafts 2 and between the outermost sleeve shaft 2 and the frame 100; specifically, the centering sleeve 14 is used to keep the upper end of the sleeve shaft 2 centered, and the centering sleeve 14 can be a copper sleeve.

[0060] like Figure 1 、 4 As shown in Figures 6 and 7, the limiting mechanism 200 may include an eccentric shaft 15, an adjustment assembly 16, and the limiting rotating components 4 corresponding to the turntable 1 one by one;

[0061] The eccentric shaft 15 is eccentrically rotatably connected to the frame 100;

[0062] The limiting rotation components 4 are sequentially connected to the eccentric shaft 15 from top to bottom, and the limiting rotation components 4 are aligned with the corresponding turntable 1;

[0063] The adjustment assembly 16 is connected to the frame 100 and to the eccentric shaft 15. The adjustment assembly 16 is used to drive the eccentric shaft 15 to rotate, thereby driving the limiting rotation component 4 on the eccentric shaft 15 to rotate until it abuts against the outer wall of the corresponding turntable 1. Specifically, the outer wall of each turntable 1 abuts against multiple limiting rotation components 4, thereby being able to center the turntable 1 and prevent the turntable 1 from becoming eccentric during rotation; wherein, the adjustment assembly 16 is also used to drive the eccentric shaft 15 to rotate in the opposite direction, thereby driving the limiting rotation component 4 on the eccentric shaft 15 to rotate until it is separated from the outer wall of the corresponding turntable 1. In this embodiment, there are four limiting mechanisms 200 evenly distributed along the circumference.

[0064] like Figures 1 to 7 As shown, the frame 100 may include a main frame and a positioning base 17, and the positioning base 17 is connected to the main frame;

[0065] The lowermost turntable 1 is rotatably mounted on the positioning base 17, the eccentric shaft 15 is eccentrically connected to the main frame, and the adjustment assembly 16 is connected to the main frame and connected to the eccentric shaft 15;

[0066] The limiting mechanism 200 also includes a reference rotating component 18 connected to the eccentric shaft 15 and aligned with the positioning base 17. When the adjusting assembly 16 drives the eccentric shaft 15 to rotate and thereby drives the reference rotating component 18 to rotate until it abuts against the outer wall of the positioning base 17, all the limiting rotating components 4 respectively abut against the outer wall of the corresponding turntable 1.

[0067] Specifically, during the disassembly and assembly process, the adjustment assembly 16 drives the eccentric shaft 15 to rotate in the reverse direction, thereby driving the reference rotating component 18 to rotate and separate from the positioning base 17, and driving the limiting rotating component 4 to rotate and separate from the corresponding turntable 1, and then the turntable 1 is disassembled or installed. After the turntable 1 is installed, the adjustment assembly 16 drives the eccentric shaft 15 to rotate in the forward direction, thereby driving the reference rotating component 18 to rotate and abut against the outer wall of the positioning base 17. At this time, the eccentric shaft 15 will no longer be able to rotate in the forward direction, and all the limiting rotating components 4 will now abut against the outer wall of the corresponding turntable 1.

[0068] In this embodiment, a planar thrust bearing 5 is provided between the lowermost turntable 1 and the positioning base 17 , and the connecting ring 6 is rotatably connected to the positioning base 17 via a radial bearing 7 .

[0069] like Figure 1 、 6As shown, the adjustment assembly 16 may include an adjustment plate 19, a first adjustment head 20, a second adjustment head 21 and an adjustment screw 22;

[0070] One end of the adjusting screw 22 is provided with a first threaded portion threadedly connected to the first adjusting head 20, and the other end of the adjusting screw 22 is provided with a second threaded portion threadedly connected to the second adjusting head 21, and the first threaded portion and the second threaded portion have opposite rotation directions;

[0071] The first adjustment head 20 is rotatably connected to the main frame.

[0072] The second adjustment head 21 is rotatably connected to the adjustment plate 19.

[0073] One end of the adjustment plate 19 is connected to the eccentric shaft 15 so as to rotate the adjustment screw 22 to drive the first adjustment head 20 and the second adjustment head 21 to move toward or away from each other, thereby driving the adjustment plate 19 and the eccentric shaft 15 to rotate.

[0074] like Figures 1 to 7 As shown, the main frame may include a top plate 23, a bottom plate 24 and a plurality of columns 25;

[0075] The lower end of the column 25 is connected to the bottom plate 24, and the top plate 23 is connected to the upper end of the column 25;

[0076] The positioning base 17 is connected to the base plate 24;

[0077] The eccentric shaft 15 includes an upper connecting shaft segment 26, a lower connecting shaft segment 27, and an eccentric mounting portion 28 located between the upper connecting shaft segment 26 and the lower connecting shaft segment 27. The upper connecting shaft segment 26 is rotatably connected to the top plate 23, and the lower connecting shaft segment 27 is rotatably connected to the bottom plate 24. The limiting rotating component 4 and the reference rotating component 18 are both connected to the eccentric mounting portion 28.

[0078] The limiting rotating component 4 and the reference rotating component 18 are both bearings. In this embodiment, the first adjusting head 20 is rotatably connected to the bottom plate 24, the pressure wheel 9 is connected to the top plate 23, and a centering sleeve 14 is provided between the outermost sleeve shaft 2 and the top plate 23.

[0079] Specifically, the driving device includes driving components corresponding one to one to the turntable 1 .

[0080] In this embodiment, the drive assembly includes a drive rod and an electric cylinder. One end of the drive rod is fixedly connected to the corresponding turntable 1, the other end of the drive rod is hinged to one end of the electric cylinder, and the other end of the electric cylinder is hinged to the frame 100. When the electric cylinder is extended or retracted, it can drive the corresponding turntable 1 to rotate through the drive rod. Of course, in some embodiments, the drive assembly may further include a motor, a gear, and an arc-shaped rack. The arc-shaped rack is connected to the corresponding turntable 1, the motor is connected to the frame 100, the gear is connected to the motor and meshes with the arc-shaped rack, and the motor drives the gear to rotate, thereby driving the arc-shaped rack and the corresponding turntable 1 to rotate.

[0081] To sum up, each of the turntables 1 can rotate independently, and thus can drive each of the sleeve shafts 2 to rotate independently; wherein, setting an annular gap 3 between adjacent sleeve shafts 2 can prevent adjacent sleeve shafts 2 from contacting each other, and thus can reduce the friction resistance encountered by the sleeve shaft 2 during rotation, thereby reducing the energy consumption required to drive the sleeve shaft 2 to rotate, and can also avoid contact wear between adjacent sleeve shafts 2 during rotation, thereby avoiding a reduction in the fitting accuracy of the sleeve shaft 2 and extending the service life of the sleeve shaft 2.

[0082] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A head-twisting device, characterized in that: It includes: Rack(100); A plurality of turntables (1), wherein the turntables (1) are stacked in sequence from bottom to top, the turntables (1) are rotatably mounted on the turntables (1) below them, and the bottom turntable (1) is rotatably mounted on the frame (100); A plurality of sleeve shafts (2), each of the sleeve shafts (2) corresponding to the turntable (1) one by one, the lower end of each sleeve shaft (2) being connected to the inner circumference of the corresponding turntable (1), the plurality of sleeve shafts (2) being stacked and arranged in sequence from the inside to the outside along the radial direction of the turntable (1), and an annular gap (3) being provided between adjacent sleeve shafts (2); A limiting device, comprising a plurality of limiting mechanisms (200) connected to the frame (100) and sequentially distributed along the circumference of the turntable (1), wherein the limiting mechanisms (200) are provided with limiting rotating components (4) corresponding to the turntable (1), and the limiting rotating components (4) abut against the outer side walls of the corresponding turntable (1) to perform center positioning on the turntable (1); A driving device is connected to the turntable (1) and is used to drive the turntable (1) to rotate independently.

2. The head-twisting device according to claim 1, characterized in that: It also includes a twisting wire drum corresponding to the sleeve shaft (2) one by one, the twisting wire drum is connected to the upper end of the corresponding sleeve shaft (2), and a wire groove is provided in the twisting wire drum.

3. The head-twisting device according to claim 1, characterized in that: Plane thrust bearings (5) are provided between adjacent turntables (1) so that the adjacent turntables (1) can rotate independently; A plane thrust bearing (5) is also provided between the bottom turntable (1) and the frame (100) so that the bottom turntable (1) can be rotatably arranged on the frame (100); The lower end of the lowermost turntable (1) is further provided with a downwardly protruding connecting ring (6), and the connecting ring (6) is rotatably connected to the frame (100) via a radial bearing (7).

4. The head-twisting device according to claim 3, characterized in that: At least one pressing wheel (9) for pressing the upper end surface of the uppermost turntable (1) is connected to the frame (100).

5. The head-twisting device according to claim 1, characterized in that: The lower end portion of the sleeve shaft (2) is provided with a supporting ring (10) protruding radially outward and at least one limiting portion (11) protruding axially downward; The inner circumference of the turntable (1) is provided with a supporting portion (12) for supporting the supporting ring (10) on the corresponding sleeve shaft (2) and a limiting slot (13) for the limiting portion (11) on the corresponding sleeve shaft (2) to be clamped.

6. The head-twisting device according to claim 1, characterized in that: Centering sleeves (14) are respectively provided between the upper ends of adjacent sleeve shafts (2) and between the outermost sleeve shaft (2) and the frame (100).

7. The head-twisting device according to claim 1, characterized in that: The limiting mechanism (200) comprises an eccentric shaft (15), an adjustment assembly (16), and the limiting rotating components (4) corresponding one-to-one to the rotating disk (1); The eccentric shaft (15) is eccentrically rotatably connected to the frame (100); The position-limiting rotation components (4) are sequentially connected to the eccentric shaft (15) from top to bottom, and the position-limiting rotation components (4) are aligned with the corresponding turntable (1); The adjusting assembly (16) is connected to the frame (100) and is connected to the eccentric shaft (15). The adjusting assembly (16) is used to drive the eccentric shaft (15) to rotate and thereby drive the limiting rotation component (4) on the eccentric shaft (15) to rotate until it abuts against the outer side wall of the corresponding turntable (1).

8. The head-twisting device according to claim 7, characterized in that: The frame (100) comprises a main frame and a positioning base (17), wherein the positioning base (17) is connected to the main frame; The lowermost turntable (1) is rotatably arranged on the positioning base (17), the eccentric shaft (15) is eccentrically rotatably connected to the main frame, and the adjustment component (16) is connected to the main frame and connected to the eccentric shaft (15); The limiting mechanism (200) further includes a reference rotating component (18) connected to the eccentric shaft (15) and aligned with the positioning base (17). When the adjusting assembly (16) drives the eccentric shaft (15) to rotate and thereby drives the reference rotating component (18) to rotate until it abuts against the outer wall of the positioning base (17), all the limiting rotating components (4) respectively abut against the outer wall of the corresponding turntable (1).

9. The head-twisting device according to claim 8, characterized in that: The adjustment assembly (16) includes an adjustment plate (19), a first adjustment head (20), a second adjustment head (21) and an adjustment screw (22); One end of the adjusting screw (22) is provided with a first threaded portion threadedly connected to the first adjusting head (20), and the other end of the adjusting screw (22) is provided with a second threaded portion threadedly connected to the second adjusting head (21), wherein the first threaded portion and the second threaded portion have opposite rotation directions; The first regulating head (20) is rotatably connected to the main frame. The second adjusting head (21) is rotatably connected to the adjusting plate (19). One end of the adjustment plate (19) is connected to the eccentric shaft (15).

10. The head-twisting device according to claim 8, characterized in that: The main frame includes a top plate (23), a bottom plate (24) and a plurality of columns (25); The lower end of the column (25) is connected to the bottom plate (24), and the top plate (23) is connected to the upper end of the column (25); The positioning base (17) is connected to the base plate (24); The eccentric shaft (15) comprises an upper connecting shaft section (26), a lower connecting shaft section (27) and an eccentric mounting portion (28) located between the upper connecting shaft section (26) and the lower connecting shaft section (27); the upper connecting shaft section (26) is rotatably connected to the top plate (23); the lower connecting shaft section (27) is rotatably connected to the bottom plate (24); the limiting rotating component (4) and the reference rotating component (18) are both connected to the eccentric mounting portion (28); Wherein, the position-limiting rotating component (4) and the reference rotating component (18) are both bearings.

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