Flywheel housing and vehicle
By setting bosses and reinforcing ribs at the bolt through holes of the flywheel housing, the problem of insufficient strength in the connection area between the flywheel housing and the engine block was solved, achieving uniform stress distribution and improved connection stability.
Patent Information
- Application Number
- CN202520131243.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The existing flywheel housing has a small design space and is subjected to high stress in the connection area with the engine body, and the reinforcement effect is not obvious, so it cannot effectively improve the strength.
Multiple bosses are set at the bolt through-hole joints of the flywheel housing. The diameter of the bosses gradually increases and they are arranged along the axial direction of the bolt through-hole joints. They are combined with reinforcing ribs to form an integrated or split structure to distribute stress evenly.
The design of bosses and reinforcing ribs evenly distributes stress, improves the strength of the connection area between the flywheel housing and the engine block, reduces stress concentration, and enhances the stability of the connection.
Smart Images
Figure CN223579386U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power device technical field, especially relates to a flywheel housing and vehicle. BACKGROUND
[0002] Flywheel housing is a connecting structure for connecting engine and transmission, which needs to bear relatively complex load. Since flywheel housing also needs to reserve installation of transmission gear, hydraulic pump and other components, the designable space reserved inside flywheel housing is very small. Especially for the area of the clamping bolt connecting flywheel housing and engine body, there is a problem of small design space and large stress, at present, the strength is improved through the way of stiffening, however, the stiffening effect is not obvious, and the strength cannot be effectively improved. SUMMARY
[0003] The utility model provides a flywheel housing, can improve the strength of the connecting area between flywheel housing and engine body.
[0004] In the first aspect, the utility model provides a flywheel housing, including flywheel housing body, the flywheel housing body is equipped with installation structure, the flywheel housing body is connected with engine body through installation structure;
[0005] The installation structure includes bolt through hole bracket and at least two bosses, and the at least two bosses are connected between the bolt through hole bracket and the flywheel housing body;
[0006] The at least two bosses are arranged along the axial direction of the bolt through hole bracket, and the boss is provided with an installation hole communicated with the bolt hole of the bolt through hole bracket;
[0007] The diameter of the boss is greater than the outer diameter of the bolt through hole bracket, and the direction of the boss along the bolt through hole bracket points to the boss, and the diameter of each boss gradually increases.
[0008] The flywheel shell provided by the utility model is provided with at least two bosses at the bottom of the bolt through-hole lug, the diameter of the bosses is larger than the outer diameter of the bolt through-hole lug, and the farther the boss is from the bolt through-hole lug, the larger the diameter of the boss is. The flywheel shell body is connected with the engine body through the bolt penetrating the bolt through-hole lug. When the engine is subjected to vibration impact, the force is transmitted to the flywheel shell through the bolt. The closer the bolt through-hole lug is to the root, the greater the stress is, and the more obvious the stress concentration is. By arranging the bosses, the closer the mounting structure is to the root, the larger the outer diameter is, so that the structure is reinforced gradually, and the stress distribution of the bolt through-hole lug along the axial direction is more uniform. In addition, because the cross-sectional area of the boss at the bottom is larger than the cross-sectional area of the bolt through-hole lug, the stress distribution of the mounting structure along the circumferential direction at the root is more uniform. Thus, the flywheel shell provided by the utility model can improve the strength of the connecting area between the flywheel shell and the body and reduce stress concentration by arranging the bosses.
[0009] In some possible embodiments, the flywheel shell further comprises a reinforcing rib, one part of the reinforcing rib is connected to the flywheel shell body, and the other part of the reinforcing rib is connected to the mounting structure.
[0010] In some possible embodiments, the flywheel shell body is provided with a first mounting area for mounting a transmission gear and a second mounting area for mounting a hydraulic pump.
[0011] The reinforcing rib is arranged on the side of the mounting structure away from the second mounting area, and the part of the reinforcing rib connected to the flywheel shell body extends towards the first mounting area.
[0012] In some possible embodiments, the reinforcing rib is provided with an avoiding groove for avoiding the transmission gear.
[0013] In some possible embodiments, the reinforcing rib and the mounting structure are in an integral structure.
[0014] In some possible embodiments, the difference between the diameter of the boss adjacent to the bolt through-hole lug and the outer diameter of the bolt through-hole lug is greater than or equal to 4 mm.
[0015] In some possible embodiments, among the two adjacent bosses, the difference between the diameter of the boss far away from the bolt through-hole lug and the diameter of the boss close to the bolt through-hole lug is greater than or equal to 4 mm.
[0016] In some possible embodiments, the diameter of the boss at the bottom is less than or equal to 40 mm.
[0017] In some possible embodiments, the bolt through-hole lug and each boss are in an integral structure.
[0018] In a second aspect, the utility model provides a kind of vehicle, including engine, transmission and the flywheel shell as described in any possible implementation in the first aspect, wherein the engine is connected with the transmission by the flywheel shell. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a structure schematic view of flywheel shell in the utility model embodiment;
[0020] Figure 2 It is a structure schematic view of installation structure in the utility model embodiment;
[0021] Figure 3 It is a top view structure schematic view of installation structure in the utility model embodiment;
[0022] Figure 4 It is Figure 3 section structure schematic view of A-A in;
[0023] Figure 5 It is Figure 3 section structure schematic view of B-B in.
[0024] In the figure:
[0025] 10-flywheel shell body;20-installation structure;21-bolt through hole bracket;22-tub;30-stiffener;31-avoiding slot;S1-first installation area;S2-second installation area;S3-third installation area. DETAILED DESCRIPTION
[0026] The technical scheme in the utility model embodiment will be described clearly and completely in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment is only part of the utility model embodiment, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of the utility model protection.
[0027] Reference Figure 1 And Figure 2 The flywheel shell in the utility model embodiment can include flywheel shell body 10, the first installation area S1 for installing transmission gear and the second installation area S2 for installing hydraulic pump are provided, the third installation area S3 for setting installation structure 20 is provided in the end of flywheel shell body 10 close to second installation area S2, and flywheel shell body 10 can be connected with engine body by installation structure 20.
[0028] Reference Figure 2The mounting structure 20 in the embodiment can include a bolt through-hole bracket 21 and at least two bosses 22 connected between the bolt through-hole bracket 21 and the flywheel shell body 10. The at least two bosses 22 can be arranged along the axial direction of the bolt through-hole bracket 21, and the bosses 22 and the bolt through-hole bracket 21 can be coaxially arranged, for example. Each boss 22 is also provided with a mounting hole in communication with the bolt hole of the bolt through-hole bracket 21, so that when the flywheel shell is connected with the engine body, the bolt can pass through the bolt through-hole bracket 21 and the mounting hole to be fixed with the engine body.
[0029] In the embodiment, the cross-sectional shape of the boss 22 can be circular, and the diameter of the boss 22 is greater than the outer diameter of the bolt through-hole bracket 21. In the direction of the bolt through-hole bracket 21 pointing to the boss 22, the diameter of each boss 22 gradually increases. That is, in any two adjacent bosses 22, the diameter of the lower boss 22 is greater than that of the upper boss 22.
[0030] When the engine is subjected to a shock impact, the force can be transmitted to the flywheel shell through the bolt. At this time, the force acting on the bolt through-hole bracket 21 can be regarded as a cantilever beam structure, that is, the closer to the root of the bolt through-hole bracket 21, the greater the force and the more obvious the stress concentration. When the structure of the boss 22 as in the embodiment is provided, the boss 22 is located at the root of the bolt through-hole bracket 21, and because the diameter of the boss 22 is greater than the outer diameter of the bolt through-hole bracket 21 and the diameters of the bosses 22 are different, the outer diameter of the mounting structure 20 is greater closer to the root, thereby achieving step-by-step structural reinforcement and making the stress distribution of the mounting structure 20 along the axial direction more uniform.
[0031] In addition, the lowermost boss 22 can greatly increase the cross-sectional area of the root of the mounting structure 20 and also make the stress distribution of the mounting structure 20 along the circumferential direction of the root more uniform. In this way, by providing at least two bosses 22 distributed along the axial direction in the embodiment, the strength of the bolt through-hole bracket 21 can be improved in both the axial and circumferential directions, thereby effectively reducing stress concentration.
[0032] Continuing to refer to Figure 2 The flywheel shell in the embodiment also includes a reinforcing rib 30, one part of which is connected to the flywheel shell body 10 and the other part of which is connected to the mounting structure 20. The overall structure of the reinforcing rib 30 can be a triangular structure, for example, one side of the reinforcing rib 30 is connected to the mounting structure 20 and the other side is connected to the flywheel shell body 10. When the bolt transmits force to the flywheel shell, the reinforcing rib 30 can also share the stress of the mounting structure 20, thereby further reducing stress concentration.
[0033] As Figure 1As shown, the third mounting area S3 has a smaller space, and when the reinforcing rib 30 is arranged, the reinforcing rib 30 can be located on the side of the mounting structure 20 away from the second mounting area S2 to avoid interference between the hydraulic pump and the reinforcing rib 30. In addition, the part of the reinforcing rib 30 connected to the flywheel shell body 10 can extend towards the first mounting area S1, so as to increase the size of the reinforcing rib 30, so as to improve the stress sharing capacity of the reinforcing rib 30.
[0034] Based on this, referring again to Figure 2 The reinforcing rib 30 can also be provided with a avoiding slot 31, which can be used to avoid the transmission gear, so as to avoid the interference between the reinforcing rib 30 and the transmission gear.
[0035] In specific implementation, the number of bosses 22 can be two, three, four, etc., and the number of bosses 22 can be adaptively designed according to actual use requirements. Taking two bosses 22 as an example, referring to Figures 3 to 5 Since the diameter of the upper boss 22 is smaller than that of the lower boss 22, the cross section of the flywheel shell body 10 and the two bosses 22 can be regarded as a continuous stepped structure.
[0036] In some embodiments, each boss 22 and the bolt through-hole bracket 21 can be an integral structure, which can enhance the overall strength of the mounting structure 20. In addition, the reinforcing rib 30 and the mounting structure 20 can also be an integral structure, so as to ensure the structural strength therebetween.
[0037] When the bolt through-hole bracket 21 is connected with the boss 22, a chamfer can be arranged between the bolt through-hole bracket 21 and the boss 22, which can facilitate improving the structural strength therebetween. When two adjacent bosses 22 are connected, a chamfer can also be arranged between the two adjacent bosses 22, so as to improve the structural strength therebetween. When the boss 22 is connected with the flywheel shell body 10, a chamfer can also be arranged between the boss 22 and the flywheel shell body 10, so as to improve the structural strength therebetween.
[0038] In some embodiments, since the diameter of the boss 22 is greater than the outer diameter of the bolt through-hole bracket 21, when the size of the boss 22 is designed, the difference between the diameter of the boss 22 adjacent to the bolt through-hole bracket 21 and the outer diameter of the bolt through-hole bracket 21 can be greater than or equal to 4 mm. Through the above size design, not only can the chamfer design between the bolt through-hole bracket 21 and the boss 22 be facilitated, but also the size of the boss 22 can be ensured to be greater than that of the bolt through-hole bracket 21.
[0039] Similarly, between two adjacent bosses 22, the diameter of the boss 22 away from the bolt through hole 21 can be greater than or equal to 4mm. In this way, while achieving the chamfer design between two bosses 22, it is also possible to ensure that the size of the lower boss 22 is greater than the size of the upper boss 22.
[0040] Further, the diameter of the bottommost boss 22 is less than or equal to 40mm, that is, the diameter of the bottommost boss 22 can be designed to be up to 40mm. As shown in the figure, the space of the third mounting area is limited, and on this basis, the diameter of the bottommost boss 22 is designed to be larger, which is beneficial to increase the cross-sectional area of the root of the mounting structure 20, so that the stress distribution of the mounting structure 20 is more uniform along the circumference at the root. Figure 1
[0041] It can be understood that, in the embodiment, by increasing the structure of the boss 22, the stress distribution of the bolt through hole 21 along the axial direction and the circumferential direction is more uniform, and the structural strength is improved in the limited design space.
[0042] Based on the same design concept, the utility model embodiment can also provide a vehicle, which can include an engine, a transmission and a flywheel housing as described in the foregoing embodiments, wherein the engine is connected with the transmission through the flywheel housing. When the engine is connected to the flywheel housing, the engine housing and the flywheel housing can be connected through the bolts fixed in the bolt through hole, so as to realize the stable connection between the two.
[0043] Since the flywheel housing described above can improve the structural strength of the connection between the engine and the flywheel housing, it can maintain the stability of the connection with the engine during the operation of the engine, so as to improve the stability of the vehicle during driving, thereby improving the performance of the vehicle.
[0044] Obviously, those skilled in the art can make various modifications and changes to the utility model embodiments without departing from the spirit and scope of the utility model. Thus, if these modifications and changes of the utility model belong to the scope of the utility model claims and their equivalent technologies, the utility model also intends to include these modifications and changes.
Claims
1. A flywheel housing, characterized in that, The flywheel shell body is provided with a mounting structure, and the flywheel shell body is connected with an engine body through the mounting structure. The mounting structure comprises a bolt through hole bracket and at least two bosses, and the at least two bosses are connected between the bolt through hole bracket and the flywheel shell body. The at least two bosses are arranged along the axial direction of the bolt through hole bracket, and the bosses are provided with mounting holes communicated with the bolt holes of the bolt through hole bracket. The diameter of the bosses is greater than the outer diameter of the bolt through hole bracket, and gradually increases in the direction of the bosses pointing to the bolt through hole bracket.
2. The flywheel housing of claim 1, wherein, The flywheel shell body is provided with a first mounting area for mounting a transmission gear and a second mounting area for mounting a hydraulic pump.
3. The flywheel housing of claim 2, wherein, The reinforcing rib is arranged on the side of the mounting structure away from the second mounting area, and the part of the reinforcing rib connected with the flywheel shell body extends towards the first mounting area. The reinforcing rib is provided with an avoiding groove for avoiding the transmission gear.
4. The flywheel housing of claim 3, wherein, The reinforcing rib and the mounting structure are integrated.
5. The flywheel housing of claim 2, wherein, The difference between the diameter of the boss adjacent to the bolt through hole bracket and the outer diameter of the bolt through hole bracket is greater than or equal to 4 mm.
6. The flywheel housing of claim 1, wherein, In the two adjacent bosses, the difference between the diameter of the boss away from the bolt through hole bracket and the diameter of the boss close to the bolt through hole bracket is greater than or equal to 4 mm.
7. The flywheel housing of claim 1, wherein, The diameter of the boss at the bottom is less than or equal to 40 mm.
8. The flywheel housing of claim 1, wherein, The bolt through hole bracket and the bosses are integrated.
9. The flywheel housing of claim 1, wherein, The flywheel shell comprises an engine, a transmission and the flywheel shell according to any one of claims 1-9, and the engine is connected with the transmission through the flywheel shell.
10. A vehicle characterized by comprising: