Flywheel fixing tool

Abstract

The utility model relates to the technical field of engine assembly, and discloses a flywheel fixing tool. The flywheel fixing tool comprises a fixing body, the fixing body is provided with a first side face and a second side face, the first side face is in a step shape and comprises a first matching face, a second matching face, a third matching face, a fourth matching face and a fifth matching face, the first matching face is matched with the rear end face of a flywheel shell, and the second matching face is matched with the inner wall face of the flywheel shell; the third matching face is matched with the end face of a flywheel gear ring, the fourth matching face is matched with the inner ring face of the flywheel gear ring, the fifth matching face is matched with the rear end face of a flywheel, and a first fixing hole and a second fixing hole are formed in the second side face. The first fastening piece penetrates through the first fixing hole and is detachably connected with a first fastening hole in the flywheel shell; the second fastening piece penetrates through the second fixing hole and is detachably connected with the second fastening hole in the flywheel. The flywheel fixing tool can solve the influence of different tooth positions on the flywheel bolt tightening process after the flywheel gear ring is subjected to interference press fitting, and the adaptability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of engine assembly, in particular to a flywheel fixing tool. Background Art

[0002] Engines play a vital role in the development of society and the advancement of industrial technology. The flywheel is an essential component of the engine, attached to the engine crankshaft via flywheel bolts. Tightening the flywheel bolts requires a high torque, so the bolts must be tightened while the flywheel is relatively stationary. Otherwise, the flywheel and its connected crankshaft, connecting rod, piston, and front-end gear train will rotate during the tightening process.

[0003] In the engine industry, considering the security of supply, parts including flywheels are often supplied simultaneously by multiple suppliers. The flywheel is equipped with a flywheel ring gear, which is press-fitted on the flywheel by interference fit. The engine flywheel is assembled to the engine crankshaft by tightening the flywheel bolts.

[0004] In related art, a flywheel anti-rotation device includes a rack and a connecting post. The rack is configured to mesh with teeth on the flywheel ring gear. A connecting post is provided at at least one of the rack's longitudinal ends, and the connecting post is configured to connect to an assembly hole in the engine block. To assemble the flywheel's fixing bolts, a worker simply connects the connecting post to the assembly hole in the engine block and then meshes the rack with the flywheel ring gear. This ensures that the flywheel and crankshaft remain stationary relative to the engine block while the flywheel fixing bolts are tightened.

[0005] During engine assembly on the production line, when the engine reaches the flywheel assembly station, the piston is at top dead center (TDC) on one cylinder, meaning the engine crankshaft is in a corresponding fixed position, meaning the flywheel bolt mounting holes on the crankshaft are fixed. Due to differences in conventional production equipment and positioning tooling between different suppliers, the circumferential position of the teeth on the flywheel ring gear varies from supplier to supplier, and the position of the teeth on the flywheel ring gear relative to the flywheel bolt mounting hole position reference may differ. At this point, if the flywheel is not rotated and the aforementioned flywheel anti-rotation device is fixed to the engine block, the rack may be misaligned with the teeth on the flywheel ring gear, preventing them from engaging and securing. At this point, if the flywheel is rotated to ensure the rack on the tooling engages and secures the flywheel ring gear, the flywheel mounting bolts will rotate synchronously. The equipment used to tighten the flywheel bolts is typically a multi-axis tightening machine, which is set to move back and forth along the engine block to directly align with the flywheel bolts for tightening. If the relative position of the flywheel bolts rotates circumferentially, the flywheel bolt tightening machine sleeve will not be able to align and tighten according to the established setup procedure.

[0006] Therefore, the above-mentioned flywheel anti-rotation device cannot be suitable for flywheels and flywheel ring gears provided by different suppliers, and has poor adaptability. Utility Model Content

[0007] In view of this, the utility model provides a flywheel fixing tool to solve the problem of poor adaptability caused by the flywheel anti-rotation device not being suitable for flywheels and flywheel ring gears provided by different suppliers.

[0008] The utility model provides a flywheel fixing tool, comprising: a fixing body, having a first side surface and a second side surface arranged opposite to each other, the first side surface is stepped and comprises a first mating surface, a second mating surface, a third mating surface, a fourth mating surface and a fifth mating surface, the first mating surface is used to cooperate with the rear end face of the flywheel housing, the second mating surface is used to cooperate with the inner wall surface of the flywheel housing, the third mating surface cooperates with the end face of the flywheel ring gear, the fourth mating surface cooperates with the inner ring surface of the flywheel ring gear, and the fifth mating surface is used to cooperate with the rear end face of the flywheel, and a first fixing hole penetrating to the first mating surface and a second fixing hole penetrating to the fifth mating surface are provided on the second side surface; a first fastener is detachably connected to the first fastening hole on the rear end face of the flywheel housing through the first fixing hole; and a second fastener is detachably connected to the second fastening hole on the rear end face of the flywheel through the second fixing hole.

[0009] Beneficial effect: Since the position of the first fastening hole on the rear end face of the flywheel is fixed relative to the position of the flywheel bolt hole, it is guaranteed by the design drawings and machining process. The flywheel is fixed to the flywheel housing through the flywheel fixing tool. The position of the flywheel housing relative to the flywheel housing is uniquely fixed, that is, the flywheel bolt and the flywheel bolt hole position on the flywheel are uniquely fixed. At this time, it can be ensured that the flywheel bolt tightening machine sleeve is aligned and tightened according to the established setting procedure. While realizing the flywheel fixed static function, it can solve the influence of different tooth positions of the flywheel gear ring after interference press fitting on the flywheel bolt tightening process. The flywheel fixing tool has a simple structure and better adaptability.

[0010] In an optional embodiment, the second side surface is stepped and includes a first mounting surface, a connecting surface, and a second mounting surface. The first fixing hole is provided on the first mounting surface, and the second fixing hole is provided on the second mounting surface.

[0011] Beneficial effect: The second side surface can also be set to a stepped shape, and a shorter second fastener can be used to fix the fixed body to the flywheel. The shorter fastener uses less material and has lower cost. It can also reduce the weight of the fixed body, saving time and effort when fixing the flywheel, thereby improving assembly efficiency.

[0012] In an optional embodiment, the first mounting surface is parallel to the first mating surface, and the second mounting surface is parallel to the third mating surface and the fifth mating surface.

[0013] Beneficial effect: When the first mating surface is fitted with the rear end face of the flywheel housing, the contact area between the first mounting surface and the head of the first fastener is large, thereby improving the stability of the connection. Similarly, when the fifth mating surface is fitted with the rear end face of the flywheel, the contact area between the second mounting surface and the head of the second fastener is large, thereby improving the reliability of the connection.

[0014] In an optional embodiment, the first mounting surface, the connecting surface and the second mounting surface are all arc-shaped.

[0015] Beneficial effects: The arc-shaped first mounting surface, the connecting surface and the second mounting surface make the structural strength of the fixing body high and the service life of the fixing body long.

[0016] In an optional embodiment, the number of the first fixing holes is plural and they form multiple groups, and the hole pitches and hole diameters of the multiple groups of first fixing holes are different.

[0017] Beneficial effect: A corresponding set of first fixing holes can be selected according to the positions of the first fastening holes on the rear end face of different flywheel housings. At this time, different bolt specifications can be selected for the first fasteners, so that the flywheel fixing tooling has good versatility and a wide range of applications, thereby improving the applicability of the tooling.

[0018] In an optional embodiment, the number of the second fixing holes is plural and they form multiple groups, and the hole pitches and hole diameters of the multiple groups of second fixing holes are different.

[0019] Beneficial effect: A corresponding set of second fixing holes can be selected according to the position of the second fastening holes on the rear end face of different flywheels. At this time, the second fasteners can use different bolt specifications, which makes the flywheel fixing tooling versatile, helps to adapt to different installation conditions or alignment requirements, has a wide range of applications, and improves the applicability of the tooling.

[0020] In an optional embodiment, the first mating surface, the second mating surface, the third mating surface, the fourth mating surface and the fifth mating surface are all arc-shaped.

[0021] Beneficial effects: The shapes of the first mating surface, the second mating surface, the third mating surface, the fourth mating surface and the fifth mating surface are easy to match with the circular flywheel housing, the flywheel ring gear and the flywheel, and the flywheel is fixed more stably and reliably to prevent the flywheel from moving.

[0022] In an optional embodiment, the fixing body is integrally formed.

[0023] Beneficial effects: One-piece molding can simplify the production process, reduce production time and cost, and ensure the structural strength of the fixed body.

[0024] In an optional embodiment, the fixing body further has a top surface and a bottom surface, the bottom surface is arranged between the first mating surface and the first mounting surface, and the top surface is arranged between the fifth mating surface and the second mounting surface, and the top surface and the bottom surface are arc-shaped.

[0025] Beneficial effects: The top and bottom surfaces are also curved, which can enhance the structural strength of the fixing body and extend the service life of the fixing body.

[0026] In an optional embodiment, the first fastener is a bolt, and the second fastener is a bolt.

[0027] Beneficial effects: The fixed body is connected to the flywheel housing and the flywheel by bolts. The bolt connection method is detachable. The flywheel fixing tool can be conveniently removed after the flywheel is fixed on the crankshaft. Appropriate tools such as wrenches and screwdrivers can be used to achieve quick installation and disassembly, and it is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A three-dimensional diagram of a flywheel fixing tool according to an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 The schematic diagram of the structure of the flywheel fixing fixture and the flywheel housing, flywheel, crankshaft and flywheel ring gear shown;

[0031] Figure 3 for Figure 2 A perspective view of the flywheel and flywheel ring gear is shown.

[0032] Description of reference numerals:

[0033] 1. Flywheel fixing fixture; 101. Fixing body; 1011. First mating surface; 1012. Second mating surface; 1013. Third mating surface; 1014. Fourth mating surface; 1015. Fifth mating surface; 1016. Top surface; 1017. Third side surface; 1021. First mounting surface; 1023. Connecting surface; 1022. Second mounting surface; 1031. First fixing hole; 1032. Second fixing hole; 102. First fastener; 103. Second fastener;

[0034] 2. Flywheel housing; 201. First fastening hole;

[0035] 3. Flywheel ring gear;

[0036] 4. Flywheel; 401. Second fastening hole; 402. Flywheel bolt hole;

[0037] 5. Crankshaft;

[0038] 6. Flywheel bolt. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0040] The following combination Figures 1 to 3 , describing the embodiments of the present utility model.

[0041] According to an embodiment of the present invention, a flywheel fixing fixture 1 is provided, comprising: a fixing body 101 , a first fastener 102 and a second fastener 103 .

[0042] Specifically, the fixed body 101 has a first side surface and a second side surface that are relatively arranged. The first side surface is stepped and includes a first mating surface 1011, a second mating surface 1012, a third mating surface 1013, a fourth mating surface 1014 and a fifth mating surface 1015. The first mating surface 1011 is used to cooperate with the rear end face of the flywheel housing 2, the second mating surface 1012 is used to cooperate with the inner wall surface of the flywheel housing 2, the third mating surface 1013 cooperates with the end face of the flywheel ring gear 3, the fourth mating surface 1014 cooperates with the inner ring surface of the flywheel ring gear 3, and the fifth mating surface 1015 is used to cooperate with the rear end face of the flywheel 4. The second side surface is provided with a first fixing hole 1031 that penetrates through the first mating surface 1011 and a second fixing hole 1032 that penetrates through the fifth mating surface 1015.

[0043] The first fastener 102 passes through the first fixing hole 1031 and is detachably connected to the first fastening hole 201 on the rear end face of the flywheel housing 2; the second fastener 103 passes through the second fixing hole 1032 and is detachably connected to the second fastening hole 401 on the rear end face of the flywheel 4.

[0044] When the flywheel fixing fixture 1 of the present embodiment is applied, since the position of the first fastening hole 201 on the rear end face of the flywheel 4 is fixed relative to the position of the flywheel bolt hole 402, it is guaranteed by the design drawings and machining process. The flywheel 4 is fixed to the flywheel housing 2 through the flywheel fixing fixture 1, and the position of the flywheel housing 2 relative to the flywheel housing 2 is uniquely fixed, that is, the position of the flywheel bolt 6 and the flywheel bolt hole 402 on the flywheel 4 is uniquely fixed. At this time, it can be ensured that the flywheel bolt 6 tightening machine sleeve is aligned and tightened according to the established setting procedure. While realizing the fixed and stationary function of the flywheel 4, it can solve the influence of the different tooth positions of the flywheel gear ring 3 after interference pressing on the tightening process of the flywheel bolt 6. The flywheel fixing fixture 1 has a simple structure and better adaptability.

[0045] It should be noted that the first fastening hole 201 is reserved on the flywheel housing 2 and is used for the subsequent installation of the vehicle's clutch housing. The second fastening hole 401 is reserved on the flywheel 4 and is used for the subsequent installation of the clutch pressure plate.

[0046] It is worth noting that the front and back of the direction are Figure 2 The arrow in the middle indicates the “front” and “back” directions.

[0047] In one embodiment, Figure 1 As shown, the second side surface is stepped and includes a first mounting surface 1021, a connecting surface 1023, and a second mounting surface 1022. The first fixing hole 1031 is provided on the first mounting surface 1021, and the second fixing hole 1032 is provided on the second mounting surface 1022. By also providing the second side surface in a stepped shape, a shorter second fastener 103 can be used to secure the fixed body 101 to the flywheel 4. A shorter fastener uses less material, is less expensive, and can also reduce the weight of the fixed body 101, saving time and effort when securing the flywheel 4, thereby improving assembly efficiency.

[0048] It is understandable that the second side surface may not be stepped, in which case the second fastener 103 is longer.

[0049] In one embodiment, Figure 1 As shown, the first mounting surface 1021 is parallel to the first mating surface 1011, and the second mounting surface 1022 is parallel to the third mating surface 1013 and the fifth mating surface 1015. When the first mating surface 1011 is in contact with the rear end surface of the flywheel housing 2, the contact area between the first mounting surface 1021 and the head of the first fastener 102 is large, thereby improving the stability of the connection. Similarly, when the fifth mating surface 1015 is in contact with the rear end surface of the flywheel 4, the contact area between the second mounting surface 1022 and the head of the second fastener 103 is large, thereby improving the reliability of the connection.

[0050] In one embodiment, Figure 1As shown, the first mounting surface 1021, the connecting surface 1023, and the second mounting surface 1022 are all arc-shaped. The arc-shaped first mounting surface 1021, the connecting surface 1023, and the second mounting surface 1022 enhance the structural strength of the fixed body 101 and prolong the service life of the fixed body 101. Furthermore, the first mounting surface 1021 and the second mounting surface 1022 are arranged in parallel.

[0051] It is understandable that the first mounting surface 1021 , the connecting surface 1023 and the second mounting surface 1022 may be planes.

[0052] In one embodiment, the number of first fixing holes 1031 is multiple, forming multiple groups. The multiple groups of first fixing holes 1031 have different hole pitches and diameters. A corresponding group of first fixing holes 1031 can be selected based on the position of the first fastening holes 201 on the rear end surface of the flywheel housing 2. In this case, the first fasteners 102 can use bolts of different specifications, thereby improving the versatility and applicability of the flywheel fixing fixture 1.

[0053] Furthermore, the number of the first fixing holes 1031 in each group of first fixing holes 1031 is two or more than three.

[0054] In one embodiment, the number of second fixing holes 1032 is multiple, forming multiple groups. The multiple groups of second fixing holes 1032 have different hole spacings and diameters. A corresponding group of second fixing holes 1032 can be selected based on the position of the second fastening holes 401 on the rear end surface of different flywheels 4. In this case, the second fasteners 103 can use bolts of different specifications. This makes the flywheel fixing fixture 1 highly versatile, helps adapt to different installation conditions or alignment requirements, has a wide range of applications, and improves the applicability of the fixture.

[0055] Furthermore, the number of the second fixing holes 1032 in each group of second fixing holes 1032 is two or more than three.

[0056] In one embodiment, Figure 1 As shown, the first mating surface 1011, the second mating surface 1012, the third mating surface 1013, the fourth mating surface 1014, and the fifth mating surface 1015 are all arc-shaped. The shapes of the first mating surface 1011, the second mating surface 1012, the third mating surface 1013, the fourth mating surface 1014, and the fifth mating surface 1015 facilitate matching with the circular flywheel housing 2, the flywheel ring gear 3, and the flywheel 4, providing a more stable and reliable fixation of the flywheel 4 and preventing the flywheel 4 from moving.

[0057] In one embodiment, the fixing body 101 is integrally formed, which can simplify the production process, reduce production time and cost, and ensure the structural strength of the fixing body 101 .

[0058] In one embodiment, Figure 1 As shown, the fixing body 101 further has a top surface 1016 and a bottom surface. The bottom surface is disposed between the first mating surface 1011 and the first mounting surface 1021, and the top surface 1016 is disposed between the fifth mating surface 1015 and the second mounting surface 1022. The top surface 1016 and the bottom surface are also curved, which can enhance the structural strength of the fixing body 101 and extend the service life of the fixing body 101.

[0059] Furthermore, the fixing body 101 further has a third side surface 1017 and a fourth side surface that are arranged opposite to each other, and the third side surface 1017 and the fourth side surface are arranged between the first side surface and the second side surface.

[0060] In one embodiment, Figure 1 As shown, the first fastener 102 is a bolt, and the second fastener 103 is a bolt. In this case, the holes in the first fastener 102 and the second fastener 103 are both threaded holes. The fixing body 101 is connected to the flywheel housing 2 and the flywheel 4 by bolts. The bolt connection is removable, and the flywheel fixing fixture 1 can be easily removed after the flywheel 4 is fixed to the crankshaft 5. Appropriate tools such as wrenches and screwdrivers can be used for quick and easy installation and removal.

[0061] It is understandable that, in another embodiment, the first fastener 102 and the second fastener 103 may be screws.

[0062] In the related art, the flywheel anti-rotation device includes a rack and a connecting post. The rack is used to mesh with the teeth on the flywheel ring gear, and at least one of the two ends of the rack in the longitudinal direction is provided with a connecting post, which is used to connect to the assembly hole of the engine cylinder block. If there is a difference in the position of the ring gear, if the flywheel is not rotated at this time and the device is fixed to the engine cylinder block, the rack may be misaligned with the teeth on the engine flywheel ring gear, and it will not be able to mesh and fix. At this time, if the flywheel is rotated to ensure that the rack on the tooling is meshed and fixed with the flywheel ring gear, the position of the flywheel mounting bolt will rotate synchronously in the circumferential direction. The flywheel bolt tightening machine is set to move back and forth along the direction of the engine cylinder block, directly aligning with the flywheel bolt for tightening. If the relative position of the flywheel bolt rotates in the circumferential direction, the flywheel bolt tightening machine sleeve will not be able to align and tighten according to the established setting procedure.

[0063] In this embodiment, the fixing body 101 of the flywheel fixing fixture 1 is designed as a stepped structure, one end of the fixing body 101 is fixed to the rear end face of the flywheel housing 2 by bolts, and the other end is fixed to the rear end face of the flywheel 4 by bolts. Since the position of the threaded hole on the rear end face of the flywheel 4 is fixed relative to the position of the flywheel bolt hole 402, it is guaranteed by the design drawings and machining process. When the flywheel 4 and the flywheel housing 2 are fixed using this flywheel fixing fixture 1, the position of the flywheel 4 relative to the flywheel housing 2 is uniquely fixed, that is, the position of the flywheel bolt 6 and the flywheel bolt hole 402 on the flywheel 4 is uniquely fixed. When the position of the flywheel bolt 6 and the flywheel bolt hole 402 is uniquely fixed, the flywheel 4 is then fixed to the crankshaft 5 through the flywheel bolt 6 through the flywheel bolt hole 402, which can ensure that the flywheel bolt 6 tightening machine sleeve is aligned and tightened according to the established setting procedure. While achieving the fixation of the flywheel 4, the adaptability of the fixing fixture in production is better improved, and the influence of the different tooth positions after the interference fit of the flywheel ring gear 3 on the tightening process of the flywheel bolt 6 can be solved. The flywheel fixing fixture 1 has a simple structure and better adaptability.

[0064] Furthermore, the fixed body 101 has a first mating surface 1011, a second mating surface 1012, a third mating surface 1013, a fourth mating surface 1014, a fifth mating surface 1015, and a first mounting surface 1021 and a second mounting surface 1022. The first mating surface 1011, the second mating surface 1012, the third mating surface 1013, the fourth mating surface 1014, and the fifth mating surface 1015 are formed in a stepped shape, and the first mounting surface 1021 and the second mounting surface 1022 are arranged in parallel. The fixed body 101 has no toothed design, resulting in a simple structure and easy processing. The first mounting surface 1021 of the fixed body 101 is fixed to the threaded hole of the flywheel housing 2 by bolts, and the second mounting surface 1022 of the fixed body 101 is fixed to the threaded hole of the flywheel 4 by bolts.

[0065] Furthermore, in order to improve the applicability of the tooling, there can be multiple groups of fixing holes on the first mounting surface 1021 and the second mounting surface 1022. The spacing and sizes of the multiple groups of fixing holes can be different. In this case, bolts of different specifications are also selected, which has good versatility.

[0066] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A flywheel fixing tool, characterized in that: include: A fixed body (101) having a first side surface and a second side surface arranged opposite to each other, wherein the first side surface is stepped and includes a first mating surface (1011), a second mating surface (1012), a third mating surface (1013), a fourth mating surface (1014) and a fifth mating surface (1015), wherein the first mating surface (1011) is used to mate with the rear end surface of the flywheel housing (2), the second mating surface (1012) is used to mate with the inner wall surface of the flywheel housing (2), the third mating surface (1013) is used to mate with the end surface of the flywheel ring gear (3), the fourth mating surface (1014) is used to mate with the inner ring surface of the flywheel ring gear (3), and the fifth mating surface (1015) is used to mate with the rear end surface of the flywheel (4); and the second side surface is provided with a first fixing hole (1031) extending through the first mating surface (1011) and a second fixing hole (1032) extending through the fifth mating surface (1015); a first fastener (102) passing through the first fixing hole (1031) and detachably connected to the first fastening hole (201) on the rear end surface of the flywheel housing (2); A second fastener (103) passes through the second fixing hole (1032) and is detachably connected to the second fastening hole (401) on the rear end surface of the flywheel (4).

2. The flywheel fixing fixture according to claim 1, characterized in that: The second side surface is stepped and comprises a first mounting surface (1021), a connecting surface (1023) and a second mounting surface (1022); the first fixing hole (1031) is arranged on the first mounting surface (1021), and the second fixing hole (1032) is arranged on the second mounting surface (1022).

3. The flywheel fixing fixture according to claim 2, characterized in that: The first mounting surface (1021) is parallel to the first mating surface (1011), and the second mounting surface (1022) is parallel to the third mating surface (1013) and the fifth mating surface (1015).

4. The flywheel fixing fixture according to claim 2, characterized in that: The first mounting surface (1021), the connecting surface (1023) and the second mounting surface (1022) are all arc-shaped.

5. The flywheel fixing fixture according to any one of claims 1 to 4, characterized in that: The number of the first fixing holes (1031) is several and they form multiple groups, and the hole pitches and hole diameters of the multiple groups of the first fixing holes (1031) are different.

6. The flywheel fixing fixture according to any one of claims 1 to 4, characterized in that: The number of the second fixing holes (1032) is several and they form multiple groups, and the hole pitches and hole diameters of the multiple groups of the second fixing holes (1032) are different.

7. The flywheel fixing fixture according to any one of claims 1 to 4, characterized in that: The first mating surface (1011), the second mating surface (1012), the third mating surface (1013), the fourth mating surface (1014) and the fifth mating surface (1015) are all arc-shaped.

8. The flywheel fixing fixture according to any one of claims 1 to 4, characterized in that: The fixing body (101) is integrally formed.

9. The flywheel fixing fixture according to claim 2, characterized in that: The fixed body (101) further comprises a top surface (1016) and a bottom surface, wherein the bottom surface is arranged between the first mating surface (1011) and the first mounting surface (1021), and the top surface (1016) is arranged between the fifth mating surface (1015) and the second mounting surface (1022), and the top surface (1016) and the bottom surface are arc-shaped.

10. The flywheel fixing fixture according to any one of claims 1 to 4, characterized in that: The first fastener (102) is a bolt, and the second fastener (103) is a bolt.

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