Flywheel connecting structure and engine

Abstract

The utility model relates to the technical field of engine flywheels, and discloses a flywheel connecting structure and an engine, the flywheel connecting structure comprises a crankshaft assembly, a flywheel, a bearing and a plurality of first bolts; the flywheel is provided with an inner hole and a plurality of first connecting holes formed around the inner hole, the first connecting holes correspond to the first bolts in a one-to-one mode, and in the radial direction of the flywheel, the area, opposite to the first connecting holes, of the side wall of the inner hole is provided with a recess; the first bolts penetrate through the corresponding first connecting holes to be connected with the end part of the crankshaft assembly, so that the flywheel is fixedly connected with the end part of the crankshaft assembly; the bearing is located in the inner hole, an outer ring of the bearing is in close fit with the side wall of the inner hole, and a gap is formed between the recess in the side wall of the inner hole and the outer ring of the bearing. According to the flywheel connecting structure, deformation of the inner hole of the flywheel cannot be compressed to the outer ring of the bearing, and clamping stagnation of the bearing is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine flywheel, especially flywheel connecting structure and engine. BACKGROUND

[0002] In actual engineering field, the flywheel and the crankshaft cooperate compactly, the flywheel transmission torque requirement is higher, the flywheel and the crankshaft are fixedly connected through the flywheel bolt, the flywheel bolt is arranged compactly and adopts the corner method and is tightened, the axial force produced by the flywheel bolt leads to the larger flywheel radial deformation, and the flywheel bearing is installed in the flywheel inner hole, the flywheel radial deformation is transmitted to the bearing outer ring inward, the pre-tightening force of the flywheel bolt can make the flywheel bearing outer ring deformation, resulting in the flywheel bearing jamming failure. SUMMARY

[0003] The utility model provides a flywheel connecting structure and engine, above -mentioned flywheel connecting structure can make the deformation of flywheel inner hole not compression to the outer ring of bearing, prevent the jamming of bearing.

[0004] In order to achieve the above object, the utility model provides the following technical scheme:

[0005] A flywheel connecting structure, comprising a crankshaft assembly, a flywheel, a bearing and a plurality of first bolts;

[0006] The flywheel has an inner hole and a plurality of first connecting holes arranged around the inner hole, the plurality of first connecting holes correspond one-to-one with the plurality of first bolts, and along the radial direction of the flywheel, the area opposite the first connecting hole of the side wall of the inner hole has a recess;

[0007] The first bolt is connected with the end of the crankshaft assembly through the corresponding first connecting hole, so that the flywheel is connected with the end of the crankshaft assembly;

[0008] The bearing is located in the inner hole, one side of the bearing abuts against the end of the crankshaft, the outer ring of the bearing is tightly matched with the side wall of the inner hole, and there is a gap between the recess on the side wall of the inner hole and the outer ring of the bearing.

[0009] Optionally, the recess is arc-shaped.

[0010] Optionally, the first connecting holes are uniformly distributed around the inner hole.

[0011] Optionally, the crankshaft assembly comprises a crankshaft, and the first bolt is connected with the end of the crankshaft;Or,

[0012] The crankshaft assembly comprises a crankshaft and a gear sleeved on the end of the crankshaft, the first bolt is connected with the end of the crankshaft through the gear, or the first bolt is connected with the gear.

[0013] Optionally, the bearing at the inner hole of the flywheel abuts against the end of the crankshaft assembly;

[0014] The flywheel connecting structure further comprises at least one positioning spring and at least one second bolt corresponding to the positioning spring;

[0015] The positioning spring comprises a connecting part and a limiting part;

[0016] The connecting part is located on the side of the flywheel away from the crankshaft assembly and extends along the radial direction of the flywheel, the first end of the connecting part is provided with a second connecting hole, and the connecting part is fixedly connected with the flywheel through the second bolt passing through the second connecting hole;

[0017] The limiting part is connected with the second end of the connecting part, the limiting part is bent towards the bearing at the edge of the inner hole, and the end of the limiting part abuts against the outer ring of the bearing.

[0018] Optionally, at least two positioning springs are included;

[0019] The at least two positioning springs are uniformly distributed around the inner hole.

[0020] Optionally, the connecting part of the positioning spring is located between the two first bolts.

[0021] Optionally, the connecting part of the positioning spring is located on the side of the first bolt away from the crankshaft assembly.

[0022] Optionally, the flywheel is provided with a third connecting hole opposite to the second connecting hole, and the second bolt is connected with the third connecting hole through the second connecting hole, so that the positioning spring is connected with the flywheel.

[0023] Optionally, the material of the positioning spring is a metal material.

[0024] The utility model further provides an engine comprising the flywheel connecting structure provided in any of the above technical solutions.

[0025] The flywheel connecting structure and the engine provided by the utility model embodiment, in the flywheel connecting structure, the flywheel has an inner hole and a plurality of first connecting holes arranged around the inner hole, the bearing is located in the inner hole, the flywheel is installed on the crankshaft assembly through the first bolt passing through the first connecting hole, the first bolt is tightened by using the angle method, a larger axial force is generated and acts on the flywheel, the deformation of the inner hole of the flywheel is large, and since the area of the side wall of the inner hole opposite to the first connecting hole is recessed, a gap is formed between the recess and the outer ring of the bearing, the deformation of the inner hole of the flywheel can not compress the outer ring of the bearing in the process of tightening the flywheel, and the sticking of the bearing is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structure diagram of a flywheel connecting structure is provided for the embodiment of the utility model;

[0027] Figure 2 A section view of a flywheel connecting structure is provided for the embodiment of the utility model;

[0028] Figure 3 A plane structure diagram of a flywheel is provided for the embodiment of the utility model;

[0029] Figure 4 A three-dimensional structure diagram of a flywheel is provided for the embodiment of the utility model;

[0030] Figure 5 A structure diagram of a positioning elastic sheet is provided for the embodiment of the utility model.

[0031] Icon:

[0032] 1-flywheel; 11-inner hole; 111-recess; 12-first connecting hole; 13-third connecting hole; 2-crankshaft assembly; 21-crankshaft; 22-gear; 3-bearing; 4-first bolt; 5-positioning elastic sheet; 51-connecting part; 511-second connecting hole; 52-limiting part; 6-second bolt. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] Please refer to Figures 1 to 4 The utility model provides a flywheel connecting structure, including crankshaft assembly 2, flywheel 1, bearing 3 and a plurality of first bolt 4;

[0035] Flywheel 1 has inner hole 11 and a plurality of first connecting hole 12 which are arranged around inner hole 11, a plurality of first connecting hole 12 correspond with a plurality of first bolt 4 one by one, along the radial direction of flywheel 1, the area with recess 111 of the side wall of inner hole 11 opposite to first connecting hole 12;

[0036] First bolt 4 passes through corresponding first connecting hole 12 and is connected with the end of crankshaft assembly 2, so that flywheel 1 is connected with the end of crankshaft assembly 2;

[0037] The bearing 3 is located in the inner hole 11, and the outer ring of the bearing 3 is tightly matched with the side wall of the inner hole 11, and the recess 111 on the side wall of the inner hole 11 has a gap with the outer ring of the bearing 3.

[0038] The flywheel 1 has the inner hole 11 and a plurality of first connecting holes 12 arranged around the inner hole 11, the bearing 3 is located in the inner hole 11, the flywheel 1 is installed on the crankshaft assembly 2 by the first bolt 4 passing through the first connecting hole 12, the first bolt 4 is tightened by the angle method, a larger axial force is generated on the flywheel 1, the inner hole 11 of the flywheel 1 is deformed greatly, and since the recess 111 is arranged on the side wall of the inner hole 11 and opposite to the first connecting hole 12, the gap between the recess 111 and the outer ring of the bearing 3 can prevent the deformation of the inner hole 11 of the flywheel 1 from compressing the outer ring of the bearing 3 during the tightening of the flywheel 1, and the jamming of the bearing 3 is prevented.

[0039] Specifically, the tightly matched outer ring of the bearing 3 and the side wall of the inner hole 11 can be an interference fit between the outer ring of the bearing 3 and the side wall of the inner hole 11.

[0040] In the embodiment of the utility model, the recess 111 can be arc-shaped, or other shapes, which is not limited here and is determined according to the actual situation.

[0041] In the embodiment of the utility model, the first connecting hole 12 can be evenly distributed around the inner hole 11, which can ensure the reliability of the flywheel 1 and the crankshaft 2.

[0042] In the embodiment of the utility model, the crankshaft assembly 2 can include a crankshaft 21, the first bolt 4 is connected with the end of the crankshaft 21, and the connection between the flywheel 1 and the end of the crankshaft assembly 2 is realized.

[0043] Alternatively, the crankshaft assembly 2 can also include a crankshaft 21 and a gear 22 sleeved on the end of the crankshaft 21, the first bolt 4 can pass through the gear 22 and be connected with the end of the crankshaft 21, or the first bolt 4 is connected with the gear 22, realizing the connection between the flywheel 1 and the end of the crankshaft assembly 2.

[0044] In the embodiment of the utility model, as shown in Figure 1 , Figure 2 and Figure 5 , the bearing 3 at the inner hole 11 of the flywheel 1 abuts against the end of the crankshaft assembly 2; the flywheel connecting structure can also include at least one positioning spring 5 and at least one second bolt 6 corresponding to the positioning spring 5 one by one;

[0045] The positioning spring 5 can include a connecting portion 51 and a limiting portion 52; the connecting portion 51 is located on the side of the flywheel 1 away from the crankshaft assembly 2 and extends along the radial direction of the flywheel 1, the first end of the connecting portion 51 is provided with a second connecting hole 511, and the connecting portion 51 is fixedly connected with the flywheel 1 by penetrating the second connecting hole 511 by the second bolt 6; the limiting portion 52 is connected with the second end of the connecting portion 51, and the limiting portion 52 is bent towards the bearing 3 at the edge of the inner hole 11; and the end of the limiting portion 52 can abut against the outer ring of the bearing 3.

[0046] Since the thickness of the flywheel 1 is thin, the groove of the circlip cannot be designed to axially position the bearing 3 of the flywheel 1. When the flywheel 1 or the flywheel bolt is used for axial positioning, the flywheel 1 needs to be disassembled for subsequent bearing 3 replacement, the process is complex, the maintenance cost is high, and the flywheel bolt cannot guarantee the torque tightening process on the market, and the reliability is at risk.

[0047] In the flywheel connecting structure, one end of the positioning spring 5 is installed on the flywheel 1 by the second bolt 6, and the other end of the positioning spring 5 can axially position the bearing 3 by the elasticity of the positioning spring 5. When the bearing 3 needs to be replaced due to failure, the flywheel 1 does not need to be disassembled, the bearing 3 can be taken out, time and labor are saved, the torque process of the first bolt 4 is guaranteed, the problem that the pre-tightening force of the first bolt 4 cannot meet the requirements when the flywheel 1 is reinstalled is avoided, and the reliability of the flywheel connecting structure is improved.

[0048] In the flywheel connecting structure, at least two positioning springs 5 can be included; the at least two positioning springs 5 can be uniformly distributed around the inner hole 11, and the positioning of the bearing 3 by the positioning spring 5 can be ensured.

[0049] For example, as shown in the figure, Figure 1 The flywheel connecting structure has three positioning springs 5 uniformly distributed around the inner hole.

[0050] Specifically, the uniform distribution of the at least two positioning springs 5 around the inner hole 11 means that the included angle between the extension directions of any two adjacent positioning springs 5 is equal.

[0051] In the flywheel connecting structure, the connecting portion 51 of the positioning spring 5 is located between the two first bolts 4, the positioning spring 5 is convenient to set, the structure is simple, and the flywheel connecting structure is easy to assemble.

[0052] Optionally, the connecting portion 51 of the positioning spring 5 can be located on the side away from the crankshaft assembly 2 of the first bolt 4, that is, the positioning spring 5 can pass over the first bolt 4, and when there is no space between the first bolts 4, the positioning spring 5 is convenient to set.

[0053] In the embodiment of the utility model, the flywheel 1 can have a third connecting hole 13 opposite to the second connecting hole 511, and the second bolt 6 passes through the second connecting hole 511 and is connected with the third connecting hole 13, so that the positioning elastic sheet 5 is connected with the flywheel 1, and the structure is simple and easy to assemble.

[0054] Specifically, when the connecting part 51 of the positioning elastic sheet 5 is located on the side away from the crankshaft assembly 2 of the first bolt 4, the second bolt 6 can also be assembled on the first bolt 4, and the positioning elastic sheet 5 is fixedly connected with the flywheel 1 through the connection of the second bolt 6 and the first bolt 4.

[0055] Specifically, the material of the positioning elastic sheet 5 can be metal material.

[0056] The utility model also provides an engine comprising the flywheel connecting structure provided in any of the above technical solutions.

[0057] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model belong to the scope of the claims of the utility model and its equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. A flywheel connection structure characterized by comprising: The crankshaft assembly, the flywheel, the bearing and a plurality of first bolts are included. The flywheel has an inner hole and a plurality of first connecting holes arranged around the inner hole, the plurality of first connecting holes correspond to the plurality of first bolts one by one, and the side wall of the inner hole has a recess opposite the first connecting hole in the radial direction of the flywheel. The first bolt is connected to the end of the crankshaft assembly through the corresponding first connecting hole to connect the flywheel and the end of the crankshaft assembly. The bearing is located in the inner hole, the outer ring of the bearing is tightly fitted with the side wall of the inner hole, and the recess on the side wall of the inner hole has a gap with the outer ring of the bearing.

2. The flywheel connection structure according to claim 1, characterized by The recess is arc-shaped.

3. The flywheel connection structure according to claim 1, characterized by The first connecting holes are uniformly distributed around the inner hole.

4. The flywheel connection structure according to claim 1, characterized by The crankshaft assembly includes a crankshaft, and the first bolt is connected to the end of the crankshaft; or The crankshaft assembly includes a crankshaft and a gear sleeve on the end of the crankshaft, the first bolt is connected to the end of the crankshaft through the gear, or the first bolt is connected to the gear.

5. The flywheel connection structure according to any one of claims 1 to 4, characterized in that, The bearing at the inner hole of the flywheel abuts against the end of the crankshaft assembly; The flywheel connecting structure further includes at least one positioning spring and at least one second bolt corresponding to the positioning spring; The positioning spring includes a connecting part and a limiting part; The connecting part is located on the side of the flywheel away from the crankshaft and extends in the radial direction of the flywheel, the first end of the connecting part has a second connecting hole, and the connecting part is fixedly connected to the flywheel through the second bolt passing through the second connecting hole; The limiting part is connected to the second end of the connecting part, the limiting part is bent towards the bearing at the edge of the inner hole, and the end of the limiting part abuts against the outer ring of the bearing.

6. The flywheel connection structure according to claim 5, characterized by The at least two positioning springs are uniformly distributed around the inner hole. The connecting part of the positioning spring is located between the two first bolts.

7. The flywheel connection structure according to claim 5, characterized in that: The connecting part of the positioning spring is located on the side of the first bolt away from the crankshaft assembly.

8. The flywheel connection structure according to claim 5, characterized by The flywheel has a third connecting hole opposite the second connecting hole, and the second bolt is connected to the second connecting hole and the third connecting hole to connect the positioning spring and the flywheel.

9. The flywheel connection structure according to claim 5, characterized by The flywheel connecting structure includes the flywheel connecting structure according to any one of claims 1-9.

10. An engine characterized by, The flywheel connecting structure includes the flywheel connecting structure according to any one of claims 1-9.

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