Assembling jig for spliced stator

Abstract

The utility model relates to an assembling jig for a block-spliced stator. The assembling jig for the block-spliced stator comprises a base, a mandrel and a hoop, one axial end of the mandrel is connected with the base; one axial end of the hoop is connected with the base, and the hoop surrounds the periphery of the mandrel and is spaced from the mandrel; the base is provided with a supporting surface used for supporting the stator block, and the supporting surface is located between the hoop and the mandrel. According to the assembling jig of the spliced stator, the hoop is arranged on the periphery of the core shaft in a surrounding mode, and the hoop and the core shaft are arranged in a spaced mode, so that the annular space is defined between the hoop and the core shaft. As the supporting surface for supporting the stator blocks on the base is located between the hoop and the mandrel, the plurality of stator blocks can be sequentially arranged in the annular space along the circumferential direction, and the plurality of stator blocks are supported by the supporting surface on the base. Therefore, a plurality of stator blocks can be positioned through the annular space, so that the tolerance of the inner diameter and the outer diameter of the spliced circular stator meets the design requirements, and the assembling jig is simple in structure and convenient to operate.

Description

Technical Field

[0001] The present application relates to the technical field of motor assembly tools, and in particular to an assembly jig for a block stator. Background Art

[0002] The concentrated winding motor with a block stator has many advantages such as convenient and efficient winding, saving silicon steel sheets and copper wire, high slot fill rate, low stator wire wrap, low copper loss, high efficiency, low temperature rise, good phase-to-phase insulation, and small torque fluctuation. It is widely used in robot servo motors.

[0003] The production process of block stators mainly includes winding, assembling, welding, wiring, binding, shaping, and varnishing. Among them, assembling means splicing multiple stator blocks in sequence along the circumferential direction to form a circular stator. In order to ensure that the inner diameter and outer diameter tolerances of the stator after assembling meet the design requirements, multiple positioning blocks need to be positioned during the assembly.

[0004] Some technical solutions in the prior art use a cylinder to press multiple stator blocks when assembling the stator blocks into a circle, position the multiple stator blocks, and then weld the multiple stator blocks. Since the cylinder needs to be used to hold the stator blocks pressed, the cost is high and the use is inconvenient. In some other technical solutions, multiple stator blocks are positioned by designing a positioning fixture without the use of a power device such as a cylinder, but the positioning fixture used is relatively complex in structure and inconvenient to operate when used. Utility Model Content

[0005] Based on this, it is necessary to provide an assembly jig for a block stator to address the technical problem that in the prior art, a positioning jig is designed to position multiple stator blocks when the block stators are assembled into a circle, but the positioning jig used has a relatively complex structure and is inconvenient to operate during use.

[0006] An assembly jig for a block stator, the assembly jig for the block stator comprising: a base, a core shaft and a clamp; one axial end of the core shaft is connected to the base; one axial end of the clamp is connected to the base, the clamp is arranged around the periphery of the core shaft and is spaced from the core shaft; the base has a supporting surface for supporting the stator block, and the supporting surface is located between the clamp and the core shaft.

[0007] In one embodiment, one axial end of the core shaft is plug-fitted into the base.

[0008] In one embodiment, one axial end of the clamp is sleeved on the base.

[0009] In one embodiment, the base includes a bottom wall and a side wall connected to and perpendicular to the bottom wall, the side wall is arranged around the core shaft and spaced apart from the core shaft; one axial end of the core shaft is connected to the bottom wall, and one axial end of the clamp is sleeved outside the side wall; the inner side of the side wall has a first step surface facing away from the bottom wall, and the supporting surface is the first step surface.

[0010] In one embodiment, the assembly jig further includes a positioning portion; the clamp is sleeved on the base; the base has a second step surface, and the second step surface is opposite to the axial end surface of the clamp; one of the axial end surface of the clamp and the second step surface is provided with a positioning hole, and the positioning portion protrudes from the other one, and the positioning portion is plugged into and matched with the positioning hole.

[0011] In one embodiment, the assembly jig further includes a plurality of positioning keys; a plurality of positioning grooves arranged circumferentially at intervals are provided on the inner side of the clamp, and the positioning grooves extend from one end of the clamp away from the base to the other end of the clamp away from the base, so that the positioning keys can be inserted into the positioning grooves from the end of the clamp away from the base.

[0012] In one embodiment, the assembly jig further includes a flattening portion, one axial end of which is adapted to the inner hole of the clamp and is used to press the stator block toward the supporting surface.

[0013] In one embodiment, the flattening portion is provided with a limiting groove, and the limiting groove extends from one end of the flattening portion close to the base to another end of the flattening portion close to the base, so that the positioning key can be inserted into the limiting groove from one end of the flattening portion close to the base.

[0014] In one embodiment, the assembly jig further includes a locking piece, the clamp having a first end and a second end opposite to each other in the circumferential direction, the first end being provided with a first connecting ear protruding outward, and the second end being provided with a second connecting ear protruding outward; the locking piece is used to lock or release the first connecting ear and the second connecting ear.

[0015] In one embodiment, the assembly fixture further includes a push-up piece, the first connecting ear is provided with a through hole, the push-up piece is used to cooperate with the through hole thread and can abut against the second connecting ear.

[0016] In one embodiment, the assembly fixture further includes an adjustment gasket, and the adjustment gasket is used to be clamped between the first connecting ear and the second connecting ear.

[0017] The assembly jig of the block stator is such that one axial end of the mandrel is connected to the base, one axial end of the hoop is connected to the base, and the hoop is disposed around the periphery of the mandrel and is spaced from the mandrel, thereby defining an annular space between the hoop and the mandrel. Since the support surface on the base for supporting the stator block is located between the hoop and the mandrel, when the block stator is assembled into a circle, multiple stator blocks can be arranged in sequence along the circumferential direction and placed in the annular space, and the multiple stator blocks are supported by the support surface on the base. In this way, the assembly jig of the block stator can position multiple stator blocks through the annular space, so that the inner diameter and outer diameter tolerances of the circular stator assembled by the multiple stator blocks meet the design requirements, and the assembly jig of the block stator has a simple structure and is easy to operate when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the matching structure of an assembly fixture of a block stator and a plurality of stator blocks according to an embodiment.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure without the flattening part installed.

[0020] Figure 3 for Figure 2 sectional view of .

[0021] Figure 4 The figure is a schematic structural diagram of a clamp according to an embodiment.

[0022] Figure 5 The figure is a schematic diagram of the matching relationship between the top opening portion and the clamp according to an embodiment.

[0023] Description of Figure Numbers:

[0024] 10. stator block; 11. joint;

[0025] 100, base; 110, bottom wall; 120, side wall; 121, first step surface; 122, second step surface; 130, positioning portion; 101, matching hole;

[0026] 200, mandrel;

[0027] 300, hoop; 310, positioning hole; 320, welding groove; 330, positioning groove; 340, first end; 341, first connecting ear; 342, through hole; 350, second end; 351, second connecting ear; 360, locking member; 361, screw; 362, nut; 370, top opening member; 380, groove; 390, adjustment gasket;

[0028] 400, positioning key;

[0029] 500, flattening portion; 510, limiting groove. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] Please refer to Figures 1 to 3 An embodiment of the present application provides an assembly jig for a block stator (hereinafter referred to as the assembly jig), which includes: a base 100, a core shaft 200, and a clamp 300. One axial end of the core shaft 200 is connected to the base 100. One axial end of the clamp 300 is connected to the base 100, and the clamp 300 is arranged around the outer periphery of the core shaft 200 and is spaced from the core shaft 200. The base 100 has a support surface for supporting the stator block 10, and the support surface is located between the clamp 300 and the core shaft 200.

[0037] In the assembly jig of the block stator, since one axial end of the mandrel 200 is connected to the base 100, and one axial end of the hoop 300 is connected to the base 100, the hoop 300 is arranged around the periphery of the mandrel 200 and is spaced from the mandrel 200, so that an annular space is defined between the hoop 300 and the mandrel 200. Since the support surface on the base 100 for supporting the stator block 10 is located between the hoop 300 and the mandrel 200, when the block stator is assembled into a circle, multiple stator blocks 10 can be arranged in sequence along the circumferential direction and placed in the annular space, and the multiple stator blocks 10 are supported by the support surface on the base 100. In this way, the assembly jig of the block stator can position multiple stator blocks 10 through the annular space, so that the inner diameter and outer diameter tolerances of the circular stator assembled by the multiple stator blocks 10 meet the design requirements, and the assembly jig of the block stator has a simple structure and is easy to operate when used.

[0038] In one embodiment, one axial end of the core shaft 200 is plugged into the base 100. Thus, when the core shaft 200 and the base 100 are connected, they only need to be plugged into each other without the aid of tools, which facilitates assembly and facilitates operation when the stator blocks are assembled into a circle.

[0039] Specifically, refer to Figure 3 , a matching hole 101 can be opened on the base 100, and one axial end of the mandrel 200 is inserted into the matching hole 101 to complete the matching of the mandrel 200 and the base 100. The mandrel 200 is adapted to the matching hole 101 to ensure that the relative position of the mandrel 200 and the base 100 is stable.

[0040] In other embodiments, a plug-in portion may be provided on the base, a matching hole may be provided at one axial end of the core shaft, and the plug-in portion is plug-fitted with the matching hole.

[0041] In one embodiment, one axial end of the clamp 300 is sleeved on the base 100. In this way, when the clamp 300 is connected to the base 100, it is only necessary to sleeve the clamp 300 on the base 100 without the aid of tools, which is convenient for assembly, and thus it is also convenient to operate when the stator blocks are assembled into a circle.

[0042] refer to Figure 3 In one embodiment, the base 100 includes a bottom wall 110 and a side wall 120 connected to and perpendicular to the bottom wall 110. One axial end of the mandrel 200 is connected to the bottom wall 110. The side wall 120 is arranged around the mandrel 200 and is spaced from the mandrel 200. One axial end of the hoop 300 is sleeved outside the side wall 120. The inner side of the side wall 120 has a first step surface 121 facing away from the bottom wall 110, and the support surface is the first step surface 121.

[0043] Since the side wall 120 surrounds the core shaft 200 and is spaced from the core shaft 200, the plurality of stator blocks 10 are located between the side wall 120 and the core shaft 200 when located in the annular space, so that the stator blocks 10 can be supported by the first step surface 121 on the inner side of the side wall 120. It can be understood that since the first step surface 121 is located on the side wall 120, it can support the outer edge of the bottom surface of the stator block 10 in the radial direction, avoiding interference with other structures at the bottom of the stator block 10.

[0044] In other embodiments, a special supporting structure may also be provided on the bottom wall of the base to support the stator block.

[0045] Specifically, the fitting hole 101 may be provided on the bottom wall 110 .

[0046] refer to Figure 3In one embodiment, the assembly jig further includes a positioning portion 130. The clamp 300 is sleeved on the base 100. The base 100 has a second step surface 122, and the second step surface 122 is opposite to the axial end surface of the clamp 300. One of the axial end surface of the clamp 300 and the second step surface 122 is provided with a positioning hole 310, and the positioning portion 130 is protrudingly arranged on the other, and the positioning portion 130 is plugged and matched with the positioning hole 310.

[0047] exist Figure 3 In the illustrated embodiment, a positioning hole 310 is provided on the axial end face of the clamp 300, and the positioning portion 130 is protruded from the second step surface 122. Through the cooperation between the positioning hole 310 and the positioning portion 130, the clamp 300 and the base 100 can be positioned in the circumferential direction to prevent the clamp 300 from rotating in the circumferential direction when the clamp 300 is put into a circle.

[0048] Specifically, the second step surface 122 may be around the outer side of the side wall 120 .

[0049] In other embodiments, a positioning portion may be provided on the axial end surface of the clamp, and a positioning hole may be provided on the second step surface, so as to achieve circumferential positioning of the clamp and the base.

[0050] refer to Figure 3 and Figure 4 In one embodiment, the assembly jig further includes a plurality of positioning keys 400. A plurality of positioning grooves 330 are arranged at intervals along the circumferential direction on the inner side of the clamp 300, and the positioning grooves 330 extend from one end of the clamp 300 away from the base 100 to the other end of the clamp 300 away from the base 100, so that the positioning keys 400 can be inserted into the positioning grooves 330 from the end of the clamp 300 away from the base 100.

[0051] Specifically, in the process of assembling the stator blocks into a circle, multiple stator blocks 10 are sequentially placed in the annular space. After placing some stator blocks 10, in order to prevent the positioning blocks 10 from moving in the circumferential direction, the positioning key 400 can be inserted into the positioning groove 330 from the end of the clamp 300 away from the base 100, so that the radial sides of the positioning key 400 are respectively in contact with the groove wall of the positioning groove 330 and the stator block 10, so that the stator block 10 and the core shaft 200 can be pressed together in the radial direction through the positioning key 400, thereby preventing the stator block 10 from moving in the circumferential direction. Then, other stator blocks 10 can be placed.

[0052] refer to Figure 1 and Figure 2 In one embodiment, the assembly jig further includes a locking member 360. The clamp 300 has a first end 340 and a second end 350 that are opposite to each other in the circumferential direction. The first end 340 is provided with a first connecting ear 341 that protrudes outward, and the second end 350 is provided with a second connecting ear 351 that protrudes outward. The locking member 360 is used to lock or release the first connecting ear 341 and the second connecting ear 351.

[0053] When the first connecting ear 341 and the second connecting ear 351 are locked, the clamp 300 can reliably lock the multiple stator blocks 10 in the annular space, which is convenient for subsequent welding of the multiple stator blocks 10. After welding is completed, the clamp 300 can be disassembled by loosening the locking member 360.

[0054] refer to Figure 1 and Figure 2 In one embodiment, the side wall 120 of the clamp 300 is provided with a plurality of welding grooves 320 arranged at intervals along the circumferential direction, and the welding grooves 320 are used to expose the joints 11 between adjacent stator blocks 10. Specifically, the welding grooves 320 are arranged in a one-to-one correspondence with the joints 11, so that the joints 11 can be exposed through the welding grooves 320, so that the joints 11 of two adjacent stator blocks 10 can be welded, thereby realizing the connection of multiple stator blocks 10.

[0055] refer to Figure 5 In one embodiment, the assembly fixture further includes a push-up piece 370 , and a through hole 342 is provided on the first connecting ear 341 . The push-up piece 370 is used to threadably cooperate with the through hole 342 , and when the two threads are threadably cooperated, one end of the push-up piece 370 passing through the first connecting ear 341 can abut against the second connecting ear 351 .

[0056] Specifically, in the process of sequentially placing a plurality of stator blocks 10 into the above-mentioned annular space, after placing most of the stator blocks 10, when only one stator block 10 is left, the remaining space is relatively small and difficult to place. At this time, the locking member 360 is in a state of releasing the first connecting ear 341 and the second connecting ear 351. Therefore, the push-up member 370 can be threadedly matched with the through hole 342, and the push-up member 370 can be rotated. Through the thread transmission, the push-up member 370 will move toward the second connecting ear 351, thereby pushing the second connecting ear 351 away from the first connecting ear 351, so that the distance between the first connecting ear 351 and the second connecting ear 351 is increased, thereby facilitating the last stator block 10 to be placed in the above-mentioned remaining space. After all the stator blocks 10 are placed in the annular space, the first connecting ear 341 and the second connecting ear 351 can be locked by the locking member 360.

[0057] refer to Figure 1 In one embodiment, the assembly jig further includes an adjustment gasket 390, which is used to be clamped between the first connecting ear 341 and the second connecting ear 351. By adjusting the gasket 390, the distance between the first connecting ear 341 and the second connecting ear 351 can be adjusted, so that the size of the enclosed space of the clamp 300 can be adjusted, thereby facilitating the adjustment of the enclosed space of the clamp 300 to match the designed outer diameter of the block stator.

[0058] refer to Figure 1In one embodiment, the locking member 360 includes a screw 361 and a nut 362. The nut 362 is used to pass through the first connecting ear 341 and the second connecting ear 351. The nut 362 is used to threadably cooperate with the screw 361, so that the first connecting ear 341 and the second connecting ear 351 can be locked by the screw 361 and the nut 362.

[0059] refer to Figure 1 , Figure 2 In one embodiment, a groove 380 cooperating with the nut 362 is provided on the first connecting ear 341 , and the groove 380 is used to accommodate the nut 362 and limit the rotation of the nut 362 .

[0060] Specifically, when the first connecting ear 341 and the second connecting ear 351 are locked by the screw 361 and the nut 362, the nut 362 is placed in the groove 380, and the rotation of the nut 362 is limited by the groove 380. The screw 361 is passed through the second connecting ear 351 and the first connecting ear 341 in sequence, and is tightened with the nut 361, so that the first connecting ear 341 and the second connecting ear 351 can be locked by the screw 361 and the nut 362.

[0061] In this embodiment, the groove 380 is a square groove and the nut 362 is a hexagonal nut. Since the shapes of the two do not match, the groove 380 can limit the rotation of the nut 362, thereby facilitating the rotation of the screw 361 and the nut 362. The groove 380 can also be designed in other shapes, such as a pentagon, a triangle, etc., as long as it can prevent the nut 362 from rotating.

[0062] In other embodiments, the second connecting ear may be provided with a groove matching with the nut, the nut is placed in the groove, the screw is passed through the first connecting ear and the second connecting ear in sequence, and is tightened with the nut.

[0063] refer to Figure 1 In one embodiment, the assembly jig further includes a flattening portion 500, one axial end of the flattening portion 500 is adapted to the inner hole of the clamp 300, and is used to press the stator block 10 toward the support surface. By inserting one axial end of the flattening portion 500 into the clamp 300, the multiple stator blocks 10 are pressed toward the support surface, so that the axial end faces of the multiple stator blocks 10 can be flush, ensuring that the axial positions of the multiple stator blocks 10 are the same, and thus making it easier for the assembled stator blocks to meet the design requirements.

[0064] In one embodiment, the flattening portion 500 is provided with a limiting groove 510, which extends from one end of the flattening portion 500 close to the base 100 to the other end of the flattening portion 500 close to the base 100, so that the positioning key 400 can be inserted into the limiting groove 510 from the end of the flattening portion 500 close to the base 100.

[0065] Specifically, when the axial end of the flattening portion 500 is inserted into the hoop 300, the position of the limiting groove 510 corresponds to the position of the positioning groove 330, so that when the flattening portion 500 is inserted into the hoop 300, the positioning key 400 is passively inserted into the limiting groove 510 from the end of the flattening portion 500 close to the base 100. In this way, the position of the flattening portion 500 along the circumferential direction can be limited by the cooperation of the positioning key 400 and the limiting groove 510, so as to prevent the flattening portion 500 from rotating relative to the hoop 300.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An assembly jig for a block stator, characterized in that: The assembly jig of the block stator comprises: a base, a core shaft and a clamp; One axial end of the mandrel is connected to the base; One axial end of the hoop is connected to the base, and the hoop is arranged around the periphery of the mandrel and spaced from the mandrel; The base has a supporting surface for supporting the stator block, and the supporting surface is located between the clamp and the core shaft.

2. The assembly jig according to claim 1, characterized in that: One axial end of the core shaft is plug-fitted with the base; and / or one axial end of the clamp is sleeved on the base.

3. The assembly jig according to claim 1, characterized in that: The base includes a bottom wall and a side wall connected to and perpendicular to the bottom wall, wherein the side wall is arranged around the core shaft and spaced apart from the core shaft; an axial end of the core shaft is connected to the bottom wall, and an axial end of the clamp is sleeved outside the side wall; the inner side of the side wall has a first step surface facing away from the bottom wall, and the supporting surface is the first step surface.

4. The assembly jig according to claim 1, characterized in that: It also includes a positioning portion; the clamp is sleeved on the base; the base has a second step surface, and the second step surface is opposite to the axial end surface of the clamp; one of the axial end surface of the clamp and the second step surface is provided with a positioning hole, and the positioning portion is protrudingly arranged on the other one, and the positioning portion is plugged into and matched with the positioning hole.

5. The assembly jig according to claim 1, characterized in that: It also includes a plurality of positioning keys; a plurality of positioning grooves are arranged circumferentially at intervals on the inner side of the clamp, and the positioning grooves extend from one end of the clamp away from the base to the other end of the clamp away from the base, so that the positioning keys can be inserted into the positioning grooves from the end of the clamp away from the base.

6. The assembly jig according to claim 5, characterized in that: It also includes a flattening portion, one axial end of which is adapted to the inner hole of the clamp and is used to press the stator block toward the supporting surface.

7. The assembly jig according to claim 6, characterized in that: The flattening portion is provided with a limiting groove, and the limiting groove extends from one end of the flattening portion close to the base to one end of the flattening portion close to the base, so that the positioning key can be inserted into the limiting groove from one end of the flattening portion close to the base.

8. The assembly jig according to claim 1, characterized in that: It also includes a locking piece, the clamp has a first end and a second end opposite to each other in the circumferential direction, the first end is provided with a first connecting ear protruding outward, and the second end is provided with a second connecting ear protruding outward; the locking piece is used to lock or release the first connecting ear and the second connecting ear.

9. The assembly jig according to claim 8, characterized in that: It also includes a push-up piece. The first connecting ear is provided with a through hole. The push-up piece is used to cooperate with the through hole thread and can abut against the second connecting ear.

10. The assembly jig according to claim 8, characterized in that: It also includes an adjustment gasket, which is used to be clamped between the first connecting ear and the second connecting ear.

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