A thin-wall workpiece anti-warping and regularization adjustment device

Abstract

The present invention provides a thin-walled workpiece anti-warping and regularizing adjustment device, comprising a base plate, an adjustment plate mounted on the top surface of the base plate, a pair of angle adjustment mechanisms disposed between the adjustment plate and the base plate; a pair of T-shaped plates disposed on the front of the adjustment plate, each T-shaped plate disposed on the front of a trapezoidal plate, each trapezoidal plate disposed on the front of a semicircular rubber strip, a support adjustment mechanism disposed between the two T-shaped plates, a thin-walled glass substrate disposed on the support adjustment mechanism and used to support and adjust the thin-walled glass substrate; an anti-warping regularizing mechanism disposed on opposite sides of the two T-shaped plates, each anti-warping regularizing mechanism mounted on the adjustment plate, and the two anti-warping regularizing mechanisms used to regularize the warping edges of the thin-walled glass substrate. The present invention, through the coordinated arrangement of the various structures, not only facilitates regularizing the warping edges of the thin-walled glass substrate during processing, facilitating subsequent processing of the glass substrate, but also is simple to operate and facilitates popularization.

Description

Technical Field

[0001] The present invention relates to the technical field related to glass substrate processing, and in particular to a thin-wall workpiece anti-warping and regularization adjustment device. Background Art

[0002] When producing thin-walled workpieces, the products need to be cut according to the production process or customer requirements. However, due to factors such as their own deflection, thin-walled workpieces are prone to warping and deformation, resulting in inconvenience in cutting or processing losses. For example, in the processing and production of thin-walled glass substrates, the main process is often cutting and marking the glass. Since the thin-walled substrate glass itself is thin, it is prone to irregular warping and deformation. Therefore, during the cutting process, product losses are often caused by cutting too deep or too shallow.

[0003] Therefore, based on the above problems, the present invention provides a thin-walled workpiece anti-warping and regularization adjustment device. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a thin-wall workpiece anti-warping and regularization adjustment device, which solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A thin-walled workpiece anti-warping and regularization adjustment device comprises a base plate, an adjustment plate is mounted on the top surface of the base plate, and a pair of symmetrical angle adjustment mechanisms are provided between the adjustment plate and the base plate, the two angle adjustment mechanisms being used to adjust the angle of the adjustment plates;

[0007] A pair of symmetrical T-shaped plates are fixedly provided on the front of the adjustment plate, each of which is fixedly provided with a trapezoidal plate on the front, and each of which is fixedly provided with a semicircular rubber strip on the front. A support adjustment mechanism is provided between the two T-shaped plates, and the support adjustment mechanism is mounted on the adjustment plate. A thin-walled glass substrate is provided on the support adjustment mechanism and is used to support and adjust the thin-walled glass substrate, and the back of the thin-walled glass substrate is in contact with the two semicircular rubber strips.

[0008] The two T-shaped plates are each provided with an anti-warping regularization mechanism on the opposite side. Each anti-warping regularization mechanism is mounted on the adjustment plate and connected to the corresponding T-shaped plate. The two anti-warping regularization mechanisms are used to regularize the warping edges of thin-walled glass substrates.

[0009] Furthermore, a plurality of U-shaped grooves are evenly formed on the bottom surface of the adjustment plate, and a matching block is movably hinged in each of the U-shaped grooves, and the bottom end of each matching block is fixedly connected to the top surface of the bottom plate.

[0010] Furthermore, the angle adjustment mechanism includes an articulated cylinder, which is arranged between the adjustment plate and the base plate. The telescopic end of the articulated cylinder is movably hinged to the adjustment plate, and the bottom of the cylinder body of the articulated cylinder is movably hinged to the base plate.

[0011] Furthermore, a number of matching support blocks are evenly penetrated and fixed on both sides of each trapezoidal plate, each matching support block is fixed to the corresponding T-shaped plate, and a pair of symmetrical rubber blocks are fixed on the front of each matching support block, and each rubber block is located on the same horizontal plane as the corresponding semicircular rubber strip.

[0012] Furthermore, the support and adjustment mechanism includes two fixed plates, each of which is fixedly connected to the front of the adjustment plate, each of which is slidably provided with a mating rack plate, each of which is fixedly provided with an L-shaped support plate on the front, each of which is used to support a thin-walled glass substrate, and a synchronous adjustment component is provided between the two mating rack plates and the adjustment plate.

[0013] Furthermore, the synchronous adjustment assembly includes a drive motor and two fixed blocks. The drive motor is fixedly mounted on the adjustment plate. A worm is fixedly mounted on the power output end of the drive motor. The two fixed blocks are fixedly connected to the front surface of the adjustment plate. A rotating shaft is rotatably arranged between the two fixed blocks. A worm gear is fixedly mounted on the rotating shaft. The worm gear is meshed with the worm.

[0014] Both ends of the two rotating shafts extend through and to the outsides of the two fixed blocks and are fixed with meshing gears, and each of the meshing gears is meshed and connected with a corresponding matching rack plate.

[0015] Furthermore, the anti-warping and regularizing mechanism includes an L-shaped fixing plate, which is arranged on one side of the T-shaped plate and fixedly connected to the adjustment plate;

[0016] An L-shaped matching groove is provided in the middle of the L-shaped fixing plate, and a number of U-shaped matching grooves are provided at equal intervals on both sides of the L-shaped matching groove. Each of the U-shaped matching grooves is provided on the L-shaped fixing plate, and a rotating shaft is provided for rotation in the L-shaped matching groove. Both ends of the rotating shaft pass through the L-shaped fixing plate and pass through the corresponding U-shaped matching grooves in sequence. An L-shaped adjustment plate is provided in each of the U-shaped matching grooves and at both ends of the rotating shaft. Each of the L-shaped adjustment plates is fixedly connected to the rotating shaft, and an arc-shaped pressure plate is fixedly provided on the end of each L-shaped adjustment plate away from the rotating shaft, and a matching adjustment component is provided between the rotating shaft and the T-shaped plate.

[0017] Furthermore, the mating adjustment assembly includes a telescopic cylinder, which is fixed on the T-shaped plate. The telescopic end of the telescopic cylinder is fixed with an L-shaped rack plate, which is arranged in the L-shaped mating groove. The L-shaped rack plate is meshed and connected with a gear ring, and the gear ring is fixedly sleeved on the rotating shaft.

[0018] The present invention provides a device for adjusting thin-walled workpieces to prevent warping and regularize them. Compared with the prior art, it has the following advantages:

[0019] 1. The present invention facilitates the coordinated arrangement of structures such as the anti-warping and regularizing mechanism, the matching adjustment component, the semicircular rubber strip, the plurality of rubber blocks, and the supporting adjustment mechanism to drive the plurality of arc-shaped pressure plates located on the same side to cooperate with the semicircular rubber strip and the plurality of rubber blocks to perform anti-warping and regularizing on the thin-walled glass substrate, so that the workpiece reaches a machinable state and reduces processing losses caused by workpiece warping and deformation. At the same time, the present invention is simple to operate, is easy to promote, and is convenient for increasing the processing efficiency of thin-walled workpieces in the later stages.

[0020] 2. The present invention facilitates adjustment of the support adjustment mechanism according to the anti-warping and regularization requirements of different thin-walled glass substrate specifications through the coordinated arrangement of the support adjustment mechanism and the synchronous adjustment assembly, thereby facilitating better anti-warping and regularization operations on the thin-walled glass substrates in the later stage, and facilitating their production and processing in the later stage;

[0021] 3. The present invention provides an angle adjustment mechanism, which drives the adjustment plate to adjust the angle under the power output of the articulated cylinder and the articulated operation. This facilitates flexible angle adjustment according to the needs of thin-walled glass substrate processing and cutting in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional connection between the overall structure of the present invention and a thin-walled glass substrate is shown;

[0024] Figure 2 A three-dimensional schematic diagram of the overall structure of the present invention is shown;

[0025] Figure 3 A three-dimensional rear view schematic diagram of the overall structure of the present invention is shown;

[0026] Figure 4A three-dimensional schematic diagram of the thin-walled glass substrate, bottom plate, adjustment plate and other structures of the present invention is shown;

[0027] Figure 5 A three-dimensional connection diagram of the anti-warping regularization mechanism of the present invention is shown;

[0028] Figure 6 A three-dimensional connection diagram of the support and adjustment mechanism of the present invention is shown;

[0029] Figure 7 The present invention is shown Figure 4 A schematic diagram of the enlarged structure at point A;

[0030] As shown in the figure: 1. Base plate; 2. Matching block; 3. Adjustment plate; 4. Anti-warping regularization mechanism; 41. Arc pressure plate; 42. L-shaped adjustment plate; 43. L-shaped fixing plate; 44. Telescopic cylinder; 45. Gear ring; 46. L-shaped rack plate; 5. T-shaped plate; 6. Thin-walled glass substrate; 7. Articulated cylinder; 8. Support adjustment mechanism; 81. Drive motor; 82. Worm gear; 83. Worm; 84. Meshing gear; 85. Fixing plate; 86. Matching rack plate; 87. Fixing block; 88. Rotating shaft; 89. L-shaped support plate; 9. Trapezoidal plate; 10. Matching support block; 11. Semicircular rubber strip; 12. Rubber block. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] In order to solve the technical problems in the background technology, a thin-walled workpiece anti-warping and regularization adjustment device is provided as follows:

[0034] Combine Figure 1-7 As shown, the present invention provides a thin-walled workpiece anti-warping and regularization adjustment device, comprising a base plate 1, with an adjustment plate 3 mounted on the top surface of the base plate 1. The bottom surface of the adjustment plate 3 is uniformly provided with a plurality of U-shaped grooves, each of which is movably hinged with a mating block 2, and the bottom end of each mating block 2 is fixedly connected to the top surface of the base plate 1. A pair of symmetrical angle adjustment mechanisms are provided between the adjustment plate 3 and the base plate 1, and the two angle adjustment mechanisms are used to adjust the angle of the adjustment plate 3.

[0035] A pair of symmetrical T-shaped plates 5 are fixed to the front of the adjustment plate 3. A trapezoidal plate 9 is fixed to the front of each T-shaped plate 5. A semicircular rubber strip 11 is fixed to the front of each trapezoidal plate 9. A support adjustment mechanism 8 is provided between the two T-shaped plates 5. The support adjustment mechanism 8 is mounted on the adjustment plate 3. A thin-walled glass substrate 6 is provided on the support adjustment mechanism 8 and is used to support and adjust the thin-walled glass substrate 6. The back of the thin-walled glass substrate 6 is in contact with the two semicircular rubber strips 11.

[0036] Anti-warping and straightening mechanisms 4 are provided on the opposite sides of the two T-shaped plates 5. Each anti-warping and straightening mechanism 4 is installed on the adjustment plate 3 and connected to the corresponding T-shaped plate 5. The two anti-warping and straightening mechanisms 4 are used to straighten the warping edges of the thin-walled glass substrate 6.

[0037] A number of mating support blocks 10 are evenly and fixedly provided on both sides of each trapezoidal plate 9. Each mating support block 10 is fixedly connected to the corresponding T-shaped plate 5. A pair of symmetrical rubber blocks 12 are fixedly provided on the front side of each mating support block 10. Each rubber block 12 is located on the same horizontal plane as the corresponding semicircular rubber strip 11.

[0038] The anti-warping and regularizing mechanism 4 includes an L-shaped fixing plate 43, which is arranged on one side of the T-shaped plate 5 and fixed to the adjustment plate 3;

[0039] An L-shaped matching groove is provided in the middle of the L-shaped fixing plate 43, and a number of U-shaped matching grooves are provided at equal intervals on both sides of the L-shaped matching groove. Each U-shaped matching groove is provided on the L-shaped fixing plate 43. A rotating shaft is provided in the L-shaped matching groove for rotation. Both ends of the rotating shaft pass through the L-shaped fixing plate 43 and pass through the corresponding U-shaped matching groove in turn. An L-shaped adjustment plate 42 is provided in each U-shaped matching groove and at both ends of the rotating shaft. Each L-shaped adjustment plate 42 is fixedly connected to the rotating shaft. An arc-shaped pressure plate 41 is fixedly provided at the end of each L-shaped adjustment plate 42 away from the rotating shaft, and a matching adjustment component is provided between the rotating shaft and the T-shaped plate 5.

[0040] The matching adjustment component includes a telescopic cylinder 44, which is fixed on the T-shaped plate 5. The model of the telescopic cylinder 44 is HR6000. An L-shaped rack plate 46 is fixed to the telescopic end of the telescopic cylinder 44. The L-shaped rack plate 46 is arranged in the L-shaped matching groove. A gear ring 45 is meshed and connected to the L-shaped rack plate 46, and the gear ring 45 is fixedly sleeved on the rotating shaft.

[0041] In specific use, in order to effectively prevent the thin-walled glass substrate 6 from warping during production and processing, the following operations are performed:

[0042] When the thin-walled glass substrate 6 needs to be trimmed or cut, in order to prevent the thin-walled glass substrate 6 from being warped during processing, see Figure 1 、 Figure 2By supporting the thin-walled glass substrate 6 to be cut through the support and adjustment mechanism 8 and making the thin-walled glass substrate 6 contact the semicircular rubber strip 11 and the rubber block 12, both sides of the thin-walled glass substrate 6 to be cut are anti-warping and regularized. By starting the telescopic cylinder 44, the power output of the telescopic cylinder 44 drives the L-shaped rack plate 46 to move. At the same time, under the meshing operation, the gear ring 45 is driven to rotate, and then the rotating shaft is driven to rotate along the L-shaped adjustment plate 42, thereby driving the multiple L-shaped adjustment plates 42 to rotate synchronously. In this way, it is easy to drive the multiple arc-shaped pressure plates 41 (the arc-shaped pressure plates 41 are made of rubber material) located on the same side to cooperate with the semicircular rubber strip 11 and the multiple rubber blocks 12 to perform anti-warping and regularization on them, so that the workpiece reaches a machinable state and reduces the processing loss caused by the warping and deformation of the workpiece.

[0043] Example 2

[0044] like Figure 1-7 As shown, based on the above embodiment, this embodiment further provides the following content:

[0045] The support and adjustment mechanism 8 includes two fixed plates 85, each of which is fixedly connected to the front surface of the adjustment plate 3. A mating rack plate 86 is slidably provided on each fixed plate 85, and an L-shaped support plate 89 is fixed to the front surface of each mating rack plate 86. Each L-shaped support plate 89 is used to support the thin-walled glass substrate 6. A synchronous adjustment component is provided between the two mating rack plates 86 and the adjustment plate 3.

[0046] The synchronous adjustment assembly includes a drive motor 81 and two fixed blocks 87. The drive motor 81 is fixedly mounted on the adjustment plate 3. The model of the drive motor 81 is VYF-02. A worm 83 is fixedly mounted on the power output end of the drive motor 81. The two fixed blocks 87 are both fixedly connected to the front surface of the adjustment plate 3. A rotating shaft 88 is rotatably mounted between the two fixed blocks 87. A worm gear 82 is fixedly mounted on the rotating shaft 88. The worm gear 82 is meshed with the worm gear 83.

[0047] Both ends of the two rotating shafts 88 extend through the outside of the two fixing blocks 87 and are fixed with meshing gears 84 . Each meshing gear 84 is meshed and connected with a corresponding matching rack plate 86 .

[0048] In specific use, based on the first embodiment, in order to further increase the practicality of the device and facilitate better anti-warping and regularization of the thin-walled glass substrate 6, the support adjustment mechanism 8 can be adjusted according to the anti-warping and regularization requirements of different thin-walled glass substrates 6 specifications. The operation is as follows:

[0049] By starting the drive motor 81, the power output of the drive motor 81 drives the worm 83 to rotate, and at the same time, in the meshing operation, drives the worm wheel 82 to rotate, and then drives the rotating shaft 88 to rotate along the two fixed blocks 87, thereby driving the two meshing gears 84 to rotate synchronously. When the meshing gears 84 rotate, each mating rack plate 86 is meshed and lifted along the corresponding meshing gear 84, thereby causing the two L-shaped support plates 89 to rise and fall synchronously. In this way, the support adjustment mechanism 8 can be adjusted according to the anti-warping and regularization requirements of different thin-walled glass substrates 6 specifications, thereby facilitating better anti-warping and regularization operations on the thin-walled glass substrates 6 in the later stage, which is beneficial to the later production and processing of the thin-walled glass substrates.

[0050] Example 3

[0051] like Figure 1-7 As shown, based on the above embodiment, this embodiment further provides the following content:

[0052] The angle adjustment mechanism includes an articulated cylinder 7, which is arranged between the adjustment plate 3 and the base plate 1. The model of the articulated cylinder 7 is LSH-064. The telescopic end of the articulated cylinder 7 is movably hinged to the adjustment plate 3, and the bottom of the cylinder body of the articulated cylinder 7 is movably hinged to the base plate 1.

[0053] In specific use, based on the second embodiment, in order to further increase the practicality of the device, the operation is as follows:

[0054] When the adjustment plate 3 needs to be adjusted according to the processing and cutting needs, the articulated cylinder 7 is started. Under the power output of the articulated cylinder 7, the telescopic end of the articulated cylinder 7 is driven to extend and retract. At the same time, under the articulated operation, the adjustment plate 3 is driven to adjust the angle. In this way, it is convenient to flexibly adjust the angle of the thin-walled glass substrate 6 according to the processing and cutting needs in the later stage.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A thin-walled workpiece anti-warping and regularization adjustment device, comprising a base plate (1), characterized in that: An adjustment plate (3) is installed on the top surface of the bottom plate (1), and a pair of symmetrical angle adjustment mechanisms are provided between the adjustment plate (3) and the bottom plate (1), and the two angle adjustment mechanisms are used to adjust the angle of the adjustment plate (3); A pair of symmetrical T-shaped plates (5) are fixedly provided on the front of the adjustment plate (3), a trapezoidal plate (9) is fixedly provided on the front of each T-shaped plate (5), a semicircular rubber strip (11) is fixedly provided on the front of each trapezoidal plate (9), a support adjustment mechanism (8) is provided between the two T-shaped plates (5), the support adjustment mechanism (8) is mounted on the adjustment plate (3), a thin-walled glass substrate (6) is provided on the support adjustment mechanism (8) and is used to support and adjust the thin-walled glass substrate (6), and the back of the thin-walled glass substrate (6) is in contact with the two semicircular rubber strips (11); An anti-warping and regularizing mechanism (4) is provided on opposite sides of the two T-shaped plates (5); each anti-warping and regularizing mechanism (4) is mounted on the adjustment plate (3) and connected to the corresponding T-shaped plate (5); the two anti-warping and regularizing mechanisms (4) are used to regularize the warping edges of the thin-walled glass substrate (6).

2. The thin-walled workpiece anti-warping and regularization adjustment device according to claim 1, characterized in that: The bottom surface of the adjustment plate (3) is evenly provided with a plurality of U-shaped grooves, each of which is movably hinged with a matching block (2), and the bottom end of each matching block (2) is fixedly connected to the top surface of the bottom plate (1).

3. The thin-walled workpiece anti-warping and regularization adjustment device according to claim 1, characterized in that: The angle adjustment mechanism comprises an articulated cylinder (7), which is arranged between the adjustment plate (3) and the base plate (1), the telescopic end of the articulated cylinder (7) being movably hinged to the adjustment plate (3), and the bottom of the cylinder body of the articulated cylinder (7) being movably hinged to the base plate (1).

4. The thin-walled workpiece anti-warping and regularization adjustment device according to claim 1, characterized in that: A plurality of matching support blocks (10) are evenly and fixedly provided on both sides of each trapezoidal plate (9), each matching support block (10) is fixedly connected to the corresponding T-shaped plate (5), and a pair of symmetrical rubber blocks (12) are fixedly provided on the front side of each matching support block (10), and each rubber block (12) is located on the same horizontal plane as the corresponding semicircular rubber strip (11).

5. The device for adjusting thin-walled workpieces to prevent warping and straighten them according to claim 1, characterized in that: The support adjustment mechanism (8) comprises two fixed plates (85), each of the fixed plates (85) is fixedly connected to the front face of the adjustment plate (3), a matching rack plate (86) is slidably provided on each of the fixed plates (85), an L-shaped support plate (89) is fixedly provided on the front face of each matching rack plate (86), and each L-shaped support plate (89) is used to support the thin-walled glass substrate (6), and a synchronous adjustment component is provided between the two matching rack plates (86) and the adjustment plate (3).

6. The thin-walled workpiece anti-warping and regularization adjustment device according to claim 5, characterized in that: The synchronous adjustment component includes a driving motor (81) and two fixed blocks (87). The driving motor (81) is fixedly mounted on the adjustment plate (3). A worm (83) is fixedly mounted on the power output end of the driving motor (81). The two fixed blocks (87) are both fixedly connected to the front surface of the adjustment plate (3). A rotating shaft (88) is rotatably mounted between the two fixed blocks (87). A worm gear (82) is fixedly mounted on the rotating shaft (88). The worm gear (82) is meshedly connected to the worm gear (83). The two ends of the two rotating shafts (88) extend through the outside of the two fixed blocks (87) and are fixed with meshing gears (84). Each meshing gear (84) is meshed and connected with a corresponding matching rack plate (86).

7. The thin-walled workpiece anti-warping and regularization adjustment device according to claim 1, characterized in that: The anti-warping and regularizing mechanism (4) comprises an L-shaped fixing plate (43), wherein the L-shaped fixing plate (43) is arranged on one side of the T-shaped plate (5) and is fixedly connected to the adjustment plate (3); An L-shaped matching groove is provided in the middle of the L-shaped fixing plate (43), and a plurality of U-shaped matching grooves are provided at equal intervals on both sides of the L-shaped matching groove. Each of the U-shaped matching grooves is provided on the L-shaped fixing plate (43). A rotating shaft is provided in the L-shaped matching groove for rotation. Both ends of the rotating shaft pass through the L-shaped fixing plate (43) and pass through the corresponding U-shaped matching grooves in sequence. An L-shaped adjustment plate (42) is provided in each of the U-shaped matching grooves and at both ends of the rotating shaft. Each of the L-shaped adjustment plates (42) is fixedly connected to the rotating shaft. An arc-shaped pressing plate (41) is fixedly provided at one end of each L-shaped adjustment plate (42) away from the rotating shaft. A matching adjustment component is provided between the rotating shaft and the T-shaped plate (5).

8. The thin-walled workpiece anti-warping and regularization adjustment device according to claim 7, characterized in that: The matching adjustment assembly includes a telescopic cylinder (44), the telescopic cylinder (44) is fixedly arranged on the T-shaped plate (5), the telescopic end of the telescopic cylinder (44) is fixedly provided with an L-shaped rack plate (46), the L-shaped rack plate (46) is arranged in the L-shaped matching groove, the L-shaped rack plate (46) is meshedly connected with a gear ring (45), and the gear ring (45) is fixedly sleeved on the rotating shaft.

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