Motor stator core laminating tool and use method
By designing a motor stator core stacking fixture, and utilizing the detachable connection between the centering column assembly and the first support assembly, as well as the insertion of the embedded block, the problem of tight fit between the stator core and the fixture, making disassembly difficult, is solved, thus achieving convenient disassembly and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-29
- Publication Date
- 2026-03-13
AI Technical Summary
After the stator core is stacked, the fit between the stator core and the tooling is tight, making it difficult to disassemble. Conventional disassembly methods suffer from wear and scratches and are costly.
The stator core stacking fixture includes a centering column assembly, a first support assembly, an insert block, and a stator core. Through the detachable connection between the centering column assembly and the first support assembly and the insertion of the insert block, a tensioned state is achieved before stacking and a relaxed state is achieved after stacking, which facilitates the disassembly of the stator core.
This effectively avoids lamination warping caused by forcibly pulling out the stator core during disassembly, reducing disassembly costs and improving disassembly efficiency.
Smart Images
Figure CN121663844A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of new energy vehicle motor manufacturing, and in particular to a motor stator core stacking tooling and its usage method. Background Technology
[0002] At present, new energy motor products are developing rapidly, and the overall performance level of motors is constantly improving. Flat wire motors have become the mainstream motor winding form because they have a higher slot fill factor, can provide larger current and a larger magnetic field.
[0003] Meanwhile, as the carrier of the winding coils, the quality of the stator core is one of the key factors affecting motor performance. Besides optimizing the manufacturing process, optimizing the assembly process and improving production tooling are also crucial factors in improving core quality. The motor stator core is formed by stacking multiple stator laminations, and this stacking process is a critical step in stator core manufacturing, with the quality of the stacking directly affecting the overall quality of the motor.
[0004] However, during the stator core lamination process, the stator core and the lamination fixture generally have a transitional fit. Furthermore, after the stator laminations are laminated, the resulting stator core has a tight fit with the fixture, making disassembly difficult. The stator core is often removed by heating, which incurs additional energy consumption and is costly. Removing the stator core directly without heating causes friction between the inner surface of the stator core and the outer surface of the lamination fixture, easily leading to scratches. Additionally, while using a tensioning die for stator core lamination allows for direct disassembly after lamination, the die requires extremely high manufacturing precision, resulting in high design costs and significant manufacturing difficulties. Summary of the Invention
[0005] The purpose of this invention is to provide a motor stator core stacking fixture and its usage method, so as to alleviate the technical problems existing in the prior art where the stator core and the fixture are tightly fitted and difficult to disassemble after the stator laminations are stacked, and conventional disassembly methods suffer from wear, scratches and high costs.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a motor stator core stacking fixture, comprising a centering column assembly, a first support assembly, an insert block and a stator core, wherein the centering column assembly is disposed within the stator core; The first end of the first support component is detachably connected to the centering column component, and the first support component is connected to the stator core; The embedded block is inserted between the second end of the first support assembly and the centering column assembly, so that the centering column assembly is fixed relative to the stator core.
[0007] Furthermore, the centering column assembly includes a centering column body and a second support block, wherein the centering column body and the second support block are detachably connected; The second support block is located between the centering column body and the stator core, and the second support block is in close contact with the stator core.
[0008] Furthermore, the centering column body is provided with a second connecting groove; The first support assembly includes a first support block and a connecting bolt, one end of which passes through the second threaded hole of the centering column body and is inserted into the second connecting groove; The first support block has a through hole, and the first support block is rotatably connected to the connecting bolt located in the second connecting groove through the through hole.
[0009] Furthermore, a V-groove is provided at one end of the first support block; The embedded block has a V-shaped protrusion, which is connected to the V-shaped groove to fix the embedded block relative to the first support block.
[0010] Furthermore, the embedded block is also provided with a plug plate, which is inserted into the gap formed between the first support block and the second connecting groove.
[0011] Furthermore, the first support block has a positioning pin on the side facing away from the centering column body, and the positioning pin is used to insert into the corresponding tooth root gap of the stator core.
[0012] Furthermore, the motor stator core stacking fixture also includes a lower pressure plate and an upper pressure plate. The lower pressure plate is supported at the bottom of the centering column assembly, the first support assembly and the stator core, and the lower pressure plate has a stepped groove. A support platform is provided at one end of the stepped groove away from the centering column assembly. The support platform is supported on the bottom of the first support block on the side opposite to the through hole; The upper pressure plate covers the top of the centering column assembly, the first support assembly, the embedded block, and the stator core.
[0013] Secondly, the present invention provides a method for using a motor stator core stacking fixture, comprising: Place the lower pressure plate, and connect the centering column body to the first support block and the second support block respectively, and place it on top of the lower pressure plate; Insert the embedded block into the gap between the first support block and the centering column body, and put the motor stator core stacking fixture into a tensioned state; The locating pin of the first support block is inserted into the lamination of the stator core so that the locating pin is inserted into the tooth root gap, and then the lamination is stacked. Remove the embedded block and adjust the position of the first support block so that the positioning pin is separated from the tooth root gap, and then remove the stator core.
[0014] Furthermore, connecting the centering column body, the first support block, and the second support block includes: The first support block is connected to the second threaded hole of the centering column body by connecting bolts.
[0015] Further, inserting the embedding block into the gap between the first support block and the centering column body includes: The V-shaped protrusion of the embedded block is connected to the V-shaped groove of the first support block so that the insert plate of the embedded block is inserted into the gap between the first support block and the centering column body.
[0016] The present invention can achieve the following beneficial effects: In a first aspect, the present invention provides a motor stator core stacking fixture, comprising a centering column assembly, a first support assembly, an insert block, and a stator core, wherein the centering column assembly is disposed within the stator core; a first end of the first support assembly is detachably connected to the centering column assembly, and the first support assembly is connected to the stator core; the insert block is inserted between the second end of the first support assembly and the centering column assembly, so that the centering column assembly is fixed relative to the stator core.
[0017] In this invention, one end of the centering column assembly is connected to the first support assembly, and the other end of the first support assembly has a gap with the centering column assembly. An insert block is positioned at this gap to keep the stacking fixture in a taut state before stacking, facilitating the subsequent insertion and stacking of stator laminations. After stacking, the insert block can be removed, and the position of the first support assembly can be adjusted to separate it radially from the stator core, effectively preventing warping of the laminations due to forced removal during demolding. At this point, a large gap exists between the first support assembly and the inner surface of the stator core, allowing the fixture to change from a taut to a relaxed state, making it easier to remove the stator core.
[0018] The stator core stacking fixture provided by this invention maintains a taut state before stacking by inserting an embedding block between the first support assembly and the centering column assembly; after removing the embedding block, the fixture can be relaxed from a taut state, making it easier to remove the stator core. This satisfies the requirement for easy disassembly between the stator core and the fixture after the stator laminations are stacked.
[0019] In summary, the present invention at least alleviates the technical problems existing in the prior art, such as the tight fit between the stator core and the tooling after the stator lamination is completed, making disassembly difficult, and the wear and scratches and high costs of conventional disassembly methods. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is an exploded structural diagram of the motor stator core stacking fixture provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the motor stator core stacking fixture provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the motor stator core stacking fixture provided in an embodiment of the present invention under tension. Figure 4 This is a top view of the motor stator core stacking fixture provided in an embodiment of the present invention under tension. Figure 5 This is a cross-sectional view of the motor stator core stacking fixture provided in an embodiment of the present invention in its open state; Figure 6 This is a top view of the motor stator core stacking fixture in the open state provided in an embodiment of the present invention. Figure 7 for Figure 4 Enlarged schematic diagram of part A in the diagram; Figure 8 for Figure 6 Enlarged schematic diagram of Part B mechanism; Figure 9 This is a three-dimensional structural diagram of the embedded block of the motor stator core stacking fixture provided in an embodiment of the present invention.
[0022] Icons: 1-Centering column body; 11-First connecting groove; 111-First threaded hole; 12-Second connecting groove; 13-Second threaded hole; 2-First support assembly; 21-First support block; 211-V-groove; 212-Positioning pin; 213-Through hole; 22-Connecting bolt; 3-Embedded block; 31-V-shaped protrusion; 32-Insertion plate; 4-Stator core; 41-Tooth root gap; 5-Second support block; 6-Lower pressure plate; 61-Stepped groove; 611-Support platform; 7-Upper pressure plate. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0029] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0030] Example 1 This embodiment provides a motor stator core stacking fixture, referencing... Figure 1 and Figure 2 The first independent device includes a centering column assembly, a first support assembly 2, an insert block 3, and a stator core 4. The centering column assembly is disposed inside the stator core 4. The first end of the first support assembly 2 is detachably connected to the centering column assembly, and the first support assembly 2 is connected to the stator core 4. The insert block 3 is inserted between the second end of the first support assembly 2 and the centering column assembly to fix the centering column assembly relative to the stator core 4.
[0031] The embodiments of the present invention at least alleviate the technical problems existing in the prior art, such as the tight fit between the stator core 4 and the tooling after the stator lamination is stacked, making it difficult to disassemble, and the high cost and wear of conventional disassembly methods.
[0032] In this embodiment of the invention, the centering column assembly is connected to one end of the first support assembly 2, and a gap is provided between the other end of the first support assembly 2 and the centering column assembly. The insert block 3 is disposed at this gap to keep the stacking fixture in a taut state before stacking, so as to facilitate the subsequent insertion of stator laminations for stacking. After stacking is completed, the insert block 3 can be removed, and the position of the first support assembly 2 can be adjusted to separate it radially from the stator core 4, effectively avoiding warping of the laminations due to forced removal during demolding. At this time, there is a large gap between the inner surface of the first support assembly 2 and the stator core 4, allowing the fixture to change from a taut state to a relaxed state, making it easier to remove the stator core 4.
[0033] The stator core stacking fixture provided in this embodiment of the invention uses an insert block 3 inserted between the first support assembly 2 and the centering column assembly to maintain the stacking fixture in a taut state before stacking. After removing the insert block 3, the fixture can be relaxed from a taut state, making it easier to remove the stator core 4. This satisfies the requirement for easy disassembly between the stator core 4 and the fixture after the stator laminations are stacked.
[0034] In an optional implementation of this embodiment, refer to Figure 1 The centering column assembly includes a centering column body 1 and a second support block 5, which are detachably connected. The second support block 5 is located between the centering column body 1 and the stator core 4, and the second support block 5 is in close contact with the stator core 4.
[0035] Specifically: the second support block 5 has two holes spaced apart, and the corresponding centering column body 1 has a first connecting groove 11, and each first connecting groove 11 has a first threaded hole 111; in use, the second support block 5 is placed in the first connecting groove 11 so that the two holes of the second support block 5 correspond to the corresponding first threaded holes 111, and then the second support block 5 is fixed in the corresponding first connecting groove 11 by screws. The centering column body 1 may have two or more first connecting grooves 11 along its circumference to realize the fixed installation of at least two second support blocks 5 along its circumference.
[0036] Furthermore, referring to Figure 1 , Figure 3 and Figure 5 The centering column body 1 has a second connecting groove 12; the first support assembly 2 includes a first support block 21 and a connecting bolt 22. One end of the connecting bolt 22 passes through the second threaded hole 13 of the centering column body 1 and is inserted into the second connecting groove 12; the first support block 21 has a through hole 213, and the first support block 21 is rotatably connected to the connecting bolt 22 located in the second connecting groove 12 through the through hole 213.
[0037] Specifically, the bottom end of the first support block 21 has a through hole 213, and correspondingly, the centering column body 1 has a second connecting groove 12, and one side of the second connecting groove 12 has a second threaded hole 13 distributed laterally. In use, the first support block 21 is placed in the second connecting groove 12 so that the through hole 213 coincides with the second threaded hole 13; then, the connecting bolts 22 are used to connect the second threaded hole 13 and the through hole 213 in sequence, so as to fix the bottom end of the first support block 21 relative to the centering column body 1 by means of the connecting bolts 22.
[0038] Furthermore, referring to Figure 1 , Figure 3 and Figure 8 The first support block 21 has a V-shaped groove 211 at one end; the embedded block 3 has a V-shaped protrusion 31, which is connected to the V-shaped groove 211 so that the embedded block 3 is fixed relative to the first support block 21.
[0039] Specifically: The top of the first support block 21 is provided with a V-shaped groove 211, and correspondingly, the bottom surface of the embedded block 3 is provided with a V-shaped protrusion 31. When the embedded block 3 is placed in the gap between the first support block 21 and the centering column body 1, the V-shaped protrusion 31 of the embedded block 3 is inserted into the V-shaped groove 211, thereby positioning the embedded block 3 relative to the first support block 21.
[0040] Furthermore, referring to Figure 3 and Figure 9 The embedded block 3 is also provided with a plug plate 32, which is inserted into the gap formed between the first support block 21 and the second connecting groove 12.
[0041] Specifically: The bottom of the embedded block 3 is provided with an insert plate 32 in the vertical direction. The insert plate 32 is located on one side of the V-shaped protrusion 31, and the insert plate 32 is used to insert into the gap formed by the first support block 21 and the second connecting groove 12. At the same time as the insert plate 32 is inserted, the V-shaped protrusion 31 and the V-shaped groove 211 are connected to each other, so as to realize that the stacking tooling is in a tensioned state.
[0042] In an optional implementation of this embodiment, refer to Figure 1 , Figure 7 and Figure 8 The first support block 21 has a positioning pin 212 on the side opposite to the centering column body 1. The positioning pin 212 is used to be inserted into the corresponding tooth root gap 41 of the stator core 4.
[0043] Specifically: the first support block 21 is provided with a positioning pin 212 along its extension direction, and the positioning pin 212 is used to insert into the corresponding tooth root gap portion 41 of the stator core 4; there are multiple tooth root gap portions 41, and the multiple tooth root gap portions 41 are distributed circumferentially at intervals along the inner wall of the stator core 4. After the positioning pin 212 is inserted into a tooth root gap portion 41, the first support block 21 is fixed to the stator core 4.
[0044] In an optional implementation of this embodiment, refer to Figure 1 , Figure 3 , Figure 4 and Figure 6 The motor stator core stacking fixture also includes a lower pressure plate 6 and an upper pressure plate 7. The lower pressure plate 6 is supported at the bottom of the centering column assembly, the first support assembly 2 and the stator core 4, and the lower pressure plate 6 has a stepped groove 61. The end of the stepped groove 61 facing away from the centering column assembly is provided with a support platform 611. The support platform 611 is supported at the bottom of the first support block 21 on the side facing away from the through hole 213. The upper pressure plate 7 covers the top of the centering column assembly, the first support assembly 2, the embedded block 3 and the stator core 4.
[0045] Specifically: Both the upper pressure plate 7 and the lower pressure plate 6 are provided with steps matching the size of the laminations to prevent the stator core 4 from opening. The lower pressure plate 6 is provided with a stepped groove 61, which is preferably a rectangular groove, and a support platform 611 is provided on the side of the groove facing away from the centering column body 1. The support platform 611 is used to support the bottom of the first support block 21, and the edge of the support platform 611 is chamfered. After the stacking is completed, the embedded block 3 is removed. At this time, the first support block 21 can rotate with its bottom contact position with the support platform 611 of the lower pressure plate 6 as the center, that is, it can rotate along the chamfered structure. At this time, the positioning pin 212 can separate from the tooth root gap 41 of the stator core 4 along its radial direction.
[0046] This embodiment provides a method for using a motor stator core stacking fixture, referring to... Figure 1 ,include: Place the lower pressure plate 6, and connect the centering column body 1 to the first support block 21 and the second support block 5 respectively, and place it on top of the lower pressure plate 6. Insert the embedded block 3 into the gap between the first support block 21 and the centering column body 1, and put the motor stator core stacking fixture into a tensioned state. The positioning pin 212 of the first support block 21 is inserted into the lamination of the stator core 4 so that the positioning pin 212 is inserted into the tooth root gap 41, and then the lamination is stacked. Remove the embedded block 3 and adjust the position of the first support block 21 so that the positioning pin 212 separates from the tooth root gap 41, and then remove the stator core 4.
[0047] Specifically: In use, the insert block 3 is first inserted between the centering column body 1 and the first support block 21. Under the dual limiting of the insert block 3 and the connecting bolt 22, the stacking fixture is kept in a taut state before stacking. At this time, the outer circle formed by the first support block 21 and the centering column assembly in the taut state and the inner circle of the stator core 4 are in a transitional fit. Then, according to the positioning pin 212 on the first support block 21, stator laminations are successively inserted and stacked. After stacking is completed, the insert block 3 can be removed, and the position of the first support block 21 can be manually adjusted to separate it radially from the stator core 4. This method can effectively avoid the problem of lamination warping caused by forced removal during demolding. At this time, a large gap is formed between the support block and the inner surface of the stator core 4, so that the fixture changes from a taut state to a relaxed state, and the stator core 4 can be removed more easily.
[0048] Furthermore, connecting the centering column body 1, the first support block 21, and the second support block 5 includes: The first support block 21 is connected to the second threaded hole 13 of the centering column body 1 by connecting bolt 22.
[0049] Specifically: the through hole 213 of the first support block 21 coincides with the second threaded hole 13 and is connected by a connecting bolt 22, and the diameter of the through hole 213 is larger than the outer diameter of the connecting bolt 22.
[0050] In an optional implementation of this embodiment, refer to Figure 1 and Figure 3 Inserting the embedded block 3 into the gap between the first support block 21 and the centering column body 1 includes: The V-shaped protrusion 31 of the embedded block 3 is connected to the V-shaped groove 211 of the first support block 21 so that the insert plate 32 of the embedded block 3 is inserted into the gap between the first support block 21 and the centering column body 1.
[0051] Specifically: The top of the first support block 21 is provided with a V-shaped groove 211, which connects with the V-shaped protrusion 31 of the embedded block 3 during the insertion of the embedded block 3, so that the embedded block 3 can be inserted more smoothly when the insert plate 32 is inserted into the gap between the first support block 21 and the centering column body 1.
[0052] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments in this specification are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A tooling for stacking motor stator cores, characterized in that, It includes a centering column assembly, a first support assembly (2), an embedded block (3) and a stator core (4), wherein the centering column assembly is disposed within the stator core (4); The first end of the first support component (2) is detachably connected to the centering column component, and the first support component (2) is connected to the stator core (4); The embedded block (3) is inserted between the second end of the first support component (2) and the centering column component, so that the centering column component is fixed relative to the stator core (4).
2. The motor stator core stacking fixture according to claim 1, characterized in that, The centering column assembly includes a centering column body (1) and a second support block (5), and the centering column body (1) and the second support block (5) are detachably connected. The second support block (5) is located between the centering column body (1) and the stator core (4), and the second support block (5) is in close contact with the stator core (4).
3. The motor stator core stacking fixture according to claim 2, characterized in that, The centering column body (1) is provided with a second connecting groove (12); The first support assembly (2) includes a first support block (21) and a connecting bolt (22). One end of the connecting bolt (22) passes through the second threaded hole (13) of the centering column body (1) and is inserted into the second connecting groove (12). The first support block (21) has a through hole (213), and the first support block (21) is rotatably connected to the connecting bolt (22) located in the second connecting groove (12) through the through hole (213).
4. The motor stator core stacking fixture according to claim 3, characterized in that, A V-groove (211) is provided at one end of the first support block (21); The embedding block (3) is provided with a V-shaped protrusion (31), which is connected to the V-shaped groove (211) so that the embedding block (3) is fixed relative to the first support block (21).
5. The motor stator core stacking fixture according to claim 4, characterized in that, The embedded block (3) is also provided with a plug plate (32), which is inserted into the gap formed between the first support block (21) and the second connecting groove (12).
6. The motor stator core stacking fixture according to claim 4, characterized in that, The first support block (21) has a positioning pin (212) on the side opposite to the centering column body (1), and the positioning pin (212) is used to be inserted into the corresponding tooth root gap (41) of the stator core (4).
7. The motor stator core stacking fixture according to claim 4, characterized in that, The motor stator core stacking fixture also includes a lower pressure plate (6) and an upper pressure plate (7). The lower pressure plate (6) is supported at the bottom of the centering column assembly, the first support assembly (2) and the stator core (4). The lower pressure plate (6) has a stepped groove (61). The stepped groove (61) has a support platform (611) at one end away from the centering column assembly. The support platform (611) is supported on the bottom of the first support block (21) on the side opposite to the through hole (213); The upper pressure plate (7) covers the top of the centering column assembly, the first support assembly (2), the embedded block (3) and the stator core (4).
8. The method of using the motor stator core stacking fixture according to claim 1, characterized in that, include: Place the lower pressure plate (6), and connect the centering column body (1) to the first support block (21) and the second support block (5) respectively, and place it on top of the lower pressure plate (6); Insert the embedded block (3) into the gap between the first support block (21) and the centering column body (1), and put the motor stator core stacking fixture into a tensioned state; According to the positioning pin (212) of the first support block (21), the lamination of the stator core (4) is inserted so that the positioning pin (212) is inserted into the tooth root gap (41), and then the lamination is stacked. Remove the embedded block (3) and adjust the position of the first support block (21) so that the positioning pin (212) is separated from the tooth root gap (41), and then remove the stator core (4).
9. The method of use according to claim 8, characterized in that, Connecting the centering column body (1), the first support block (21), and the second support block (5) includes: The first support block (21) is connected to the second threaded hole (13) of the centering column body (1) by connecting bolts (22).
10. The method of use according to claim 8, characterized in that, Inserting the embedding block (3) into the gap between the first support block (21) and the centering column body (1) includes: The V-shaped protrusion (31) of the embedded block (3) is connected to the V-shaped groove (211) of the first support block (21) so that the insert plate (32) of the embedded block (3) is inserted into the gap between the first support block (21) and the centering column body (1).