CN220646471U - Inertia disc for transmission shaft, transmission shaft assembly and vehicle - Google Patents

Abstract

The utility model discloses an inertia disc for a transmission shaft, a transmission shaft assembly and a vehicle. The embodiment of the utility model is assembled on the upstream side of the middle support piece of the transmission shaft in a press-fit welding mode, so that not only can the effects of rapidly throwing away dirt such as sediment and the like to prevent the sediment from impacting or even piling up, but also the dynamic balance of the transmission system can be better matched, the vibration noise of the transmission system is reduced, and the NVH performance of the whole vehicle is improved.

Description

Inertia disc for transmission shaft, transmission shaft assembly and vehicle

Technical Field

The utility model relates to the technical field of vehicle accessories, in particular to an inertia disc for a transmission shaft, a transmission shaft assembly and a vehicle.

Background

The transmission shaft assembly is a mechanical component for transmitting power between two shafts with different shaft centers or between two shafts with continuously changing relative positions in operation. The driving force of the engine is transmitted from the transmission through the main reduction gear and finally transmitted to the road surface by the tire, and the function of the transmission shaft assembly is to transmit power in the middle process.

In general, a rear drive mode or a front drive mode of a rear drive vehicle can be used for a rear drive shaft, and the rear drive shaft is used for transmitting power to a rear axle and belongs to a main power transmission device of the rear drive vehicle type. For long wheelbase automobiles, in order to increase the critical rotation speed of the transmission shaft, avoid resonance and reduce noise, the rear transmission shaft is usually made in a sectional manner, i.e. composed of a front section, a rear section and a support member located in the middle. The support is usually mounted on the frame and is capable of compensating for mounting errors in the axial and angular directions of the drive shaft and displacements caused by engine play or frame deformation during driving of the vehicle.

Considering that the transmission shaft assembly is generally arranged at the bottommost end of a vehicle, the middle supporting piece protrudes outwards due to the fact that the rubber sleeve needs to achieve a damping effect, so that the middle bearing position is relatively sunken, when the vehicle encounters a bad road, particularly a road surface containing muddy water, much muddy water is flushed to the relatively sunken position of the middle bearing position and accumulated, the muddy water is accumulated more and more so as to cause dry solidification, heat on the inner side of the supporting piece cannot be discharged, the bearing is easy to burn and damage due to long-time high-speed running, the muddy water also enters the bearing along the sealing ring, the bearing is damaged and invalid, the transmission shaft is finally damaged, and the vehicle is lost.

In addition, power is transmitted through rotation of a gear or a transmission shaft in the running process of a vehicle, but due to the fact that a plurality of parts of a transmission system are improperly matched, gaps are too large and too small, or some modes are amplified, noise and vibration exceeding standards can occur in the running process of the vehicle, in order to solve the vibration problem of the transmission system, an inertia disc is added between the transmission shaft and a transmission, vibration energy of the transmission shaft is absorbed by large-mass rotation of the inertia disc, and the vibration energy of the transmission shaft is transferred to the inertia disc, so that vibration of the transmission system is reduced. However, the inertia discs are arranged between the transmission shaft and the speed changer through the fixing bolts, and due to the reasons of dimensional tolerance, moment difference, gap difference and the like, the inertia discs are arranged on some vehicles, so that the effect of reducing noise and vibration cannot be achieved, and on the contrary, the problem is more serious because the difference is increased, and the dynamic balance of the transmission system is damaged.

Disclosure of Invention

The utility model aims to at least solve the technical problems that dirt is collected and difficult to discharge due to the installation of a supporting structure on a transmission shaft in the prior art.

In order to solve the technical problems, the utility model provides an inertia disc for a transmission shaft, which comprises an inertia disc main body, wherein the inertia disc main body is of an expansion structure and is provided with a first opening and a second opening, the cross section size of the first opening is smaller than that of the second opening, and the first opening is connected with the transmission shaft.

In some embodiments, the inertia disc body is bowl-shaped, the inertia disc body includes a connection portion, a transition portion, and a mass portion, the connection portion is connected with the transmission shaft, the first opening is located on the connection portion, and the second opening is located on the mass portion.

In some embodiments, the outer surface of the inertia disc body is smoothly curved from the first opening to the second opening.

In some embodiments, at least one slot is provided on an outer surface of the inertia disc body, the slot extending from the first opening to the second opening.

In some embodiments, the plurality of grooves is provided in a plurality, and the plurality of grooves is uniformly arranged between the first opening and the second opening.

In some embodiments, an interference fit is provided between an inner wall of the first opening and a surface of the drive shaft.

In another aspect, the utility model provides a drive shaft assembly, including a drive shaft and an inertia disc as described in any of the above, wherein the inertia disc is sleeved on the drive shaft, and the drive shaft penetrates from the first opening and penetrates from the second opening.

In some embodiments, the first opening is disposed toward a head direction of the vehicle.

In some embodiments, the transmission shaft comprises a front section and a rear section, a support member is arranged at one end of the front section, which is close to the rear section, and the inertia disc is arranged at one side, close to the direction of the vehicle head, of the support member.

Another aspect of the utility model provides a vehicle comprising the propeller shaft assembly described above.

The embodiment of the utility model is assembled on the upstream side of the middle support piece of the transmission shaft in a press-fit welding mode, so that not only can the effects of rapidly throwing away dirt such as sediment and the like to prevent the sediment from impacting or even piling up, but also the dynamic balance of the transmission system can be better matched, the vibration noise of the transmission system is reduced, and the NVH performance of the whole vehicle is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an inertia disc assembly according to an embodiment of the present utility model;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is a schematic diagram of an inertia disc body according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a second embodiment of an inertia disc body;

fig. 5 is a cross-sectional view of the inertia disc body of fig. 4.

Reference numerals:

1. an inertia disc main body; 1a, a first end; 1b, a second end; 11. a first opening; 12. a second opening; 13. a groove; 14. a connection part; 15. a transition section; 16. a mass part; 2. a transmission shaft; 21. a front section; 211. a support; 22. and a rear section.

Detailed Description

Various aspects and features of the present utility model are described herein with reference to the accompanying drawings.

It should be understood that various modifications may be made to the embodiments of the application herein. Therefore, the above description should not be taken as limiting, but merely as exemplification of the embodiments. Other modifications within the scope and spirit of the utility model will occur to persons of ordinary skill in the art.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and, together with a general description of the utility model given above, and the detailed description of the embodiments given below, serve to explain the principles of the utility model.

These and other characteristics of the utility model will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.

It is also to be understood that, although the utility model has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the utility model, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present utility model will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present utility model will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the utility model, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the utility model in unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present utility model in virtually any appropriately detailed structure.

The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the utility model.

A first embodiment of the present utility model provides an inertia disc for a propeller shaft, which includes an inertia disc body 1, as shown in fig. 1 to 5, the inertia disc body 1 being disposed on the propeller shaft 2. The inertia disc body 1 of the present embodiment adopts an expansion structure, specifically, the first end 1a of the inertia disc body 1 expands toward the second end 1b one by one to form an expansion structure, that is, the diameter of the first end 1a of the inertia disc body 1 is smaller than the diameter of the second end 1b thereof.

In order to facilitate the arrangement of the inertia disc body 1 on the transmission shaft 2, a first opening 11 and a second opening 12 are formed in the inertia disc body 1, the first opening 11 is located at a first end 1a of the inertia disc body 1, the second opening 12 is located at a second end 1b of the inertia disc body 1, accordingly, the cross-sectional size of the first opening 11 is smaller than that of the second opening 12, the transmission shaft 2 penetrates from the first opening 11 and penetrates from the second opening 12 of the inertia disc body 1, and the cross-sectional size of the first opening 11 is determined based on the diameter of the transmission shaft 2.

Specifically, in order to facilitate the arrangement of the inertia disc body 1 on the drive shaft 2, the first opening 11 of the inertia disc body 1 is connected to the drive shaft 2, where the first opening 11 is installed facing the direction of the vehicle head. Preferably, the first opening 11 is fixedly connected with the transmission shaft 2 by welding, for example. Specifically, the inner wall of the first opening 11 is in interference fit with the outer surface of the transmission shaft 2, and press fitting is achieved, after press fitting is completed, the inner wall of the first opening 11 is welded with the outer surface of the transmission shaft 2, so that the inertia disc main body 1 is connected with the transmission shaft 2, and the inertia disc main body 1 is effectively prevented from loosening and axially sliding relative to the transmission shaft 2 when a vehicle runs. Of course, set up on the transmission shaft 2 after the inertia dish main part 1, still can be right the transmission shaft 2 carries out dynamic balance detection, right according to dynamic balance testing result inertia dish main part 1 debugs, through set up the inertia dish on the transmission shaft 2 can effectively reduce transmission system's noise, and then promotes transmission shaft 2's NVH performance, can avoid installing the inertia dish again after accomplishing dynamic balance, causes the drive train dynamic balance inaccurate, causes whole car vibrations abnormal sound problem.

Further, the inertia disc main body 1 is arranged on the transmission shaft 2 in a press-fitting and welding connection manner, so that noise and vibration caused by difference of dimensional tolerance, moment and gap can be avoided, and damage to dynamic balance of a vehicle transmission system due to unstable fixation between the inertia disc main body 1 and the transmission shaft 2 is prevented.

In addition, when the vehicle runs, since the driving shaft 2 continuously rotates, after muddy water and other dirt impact the inertia disc body 1 and are attached to the surface of the inertia disc body 1, the dirt can be continuously pushed by centrifugal force to gradually move along the surface of the inertia disc body 1 toward one end with a larger diameter of the inertia disc body 1, that is, the second end 1b of the inertia disc body 1 (arrow direction in fig. 2), and then the dirt is thrown out from the edge of the second end 1b of the inertia disc body 1, thereby realizing an efficient self-cleaning effect and avoiding accumulation of the dirt.

In order to further improve the self-cleaning effect, at least one groove 13 is formed on the outer surface of the inertia disc body 1, and the groove 13 extends from the first opening 11 to the second opening 12 of the inertia disc body 1. By providing the slot 13 a more direct trapway can be provided on the outer surface of the inertia disc body 1 for dirt to be thrown out fast along the slot 13 towards the outside under the effect of centrifugal force, in particular when the drive shaft 2 rotates at high speed, the dirt discharging efficiency of the inertia disc body 1 can be enhanced.

Considering that the grooves 13 extend from the first opening 11 up to the second opening 12, in some embodiments, the grooves 13 are plural, and the plural grooves 13 are uniformly arranged radially between the first opening 11 to the second opening 12, preferably, the grooves 13 are provided in 8.

According to the embodiment of the utility model, the inertia disc main body 1 with the expansion structure is arranged on the transmission shaft 2, so that dirt such as muddy water can be prevented from entering the connecting gap between the transmission shaft 2 and other parts (such as a supporting structure), and the dirt can be quickly thrown out through the groove 13 arranged on the inertia disc main body 1, so that the service life of the transmission shaft 2 is prolonged, and the overall performance of a vehicle is improved.

In some embodiments, as shown in fig. 1 to 5, the inertia disc body 1 in this embodiment may be in a bowl-shaped structure as a whole, and the inertia disc body 1 specifically includes a connection portion 14, a transition portion 15, and a mass portion 16, where the transition portion 15 is located between and integrally connects the connection portion 14 and the mass portion 16, and it is understood that the connection portion 14, the transition portion 15, and the mass portion 16 in this embodiment may be a part of the integral structure of the inertia disc body 1, and are named and described separately for convenience in describing the structure of the inertia disc body 1, and of course, the connection portion 14, the transition portion 15, and the mass portion 16 may also be separate members, which together form the inertia disc body 1 after being integrally connected. Preferably, the connecting portion 14, the transition portion 15 and the mass portion 16 are integrally formed, and the structure is simple and the manufacturing is convenient.

Further, the connection portion 14 is configured to be connected to the transmission shaft 2, and is disposed near an incoming flow direction of dirt such as muddy water, the first opening 11 is disposed in a middle portion of the connection portion 14, and the connection portion 14 is connected to the transmission shaft 2 through the first opening 11. The mass portion 16 is disposed away from the incoming flow direction of dirt such as muddy water, and is mainly used for improving the mass of the inertia disc main body 1 so as to improve the NVH performance of the transmission shaft 2, and the second opening 12 is disposed in the middle of the mass portion 16 and opposite to the first opening 11. The mass portion 16 of the inertia disc main body 1 has a relatively high mass, for example, may be made of a disc having a certain thickness, so that when the transmission shaft 2 continuously rotates, the mass portion 16 can absorb vibration energy from the transmission shaft 2, thereby effectively reducing vibration of the entire transmission system.

Further, the transition 15 is arranged between the connecting portion 14 and the mass portion 16, which is preferably in the shape of a landing. In this way, the cross-sectional diameter from the connecting portion 14 to the transition portion 15 to the mass portion 16 gradually increases to form the bowl-like structure. The transition 15 serves here as a main expansion structure, which enables dirt to be thrown out during high-speed rotation. When dirt impinges on the transition portion 15 in the axial direction of the drive shaft 2, for example, it moves along the groove 13 on the transition portion 15 under the influence of centrifugal force and reaches the outer surface of the mass portion 16 and is finally thrown out, which can improve the efficiency of the sewage discharge.

Further, the outer surface of the inertia disc body 1 from the first opening 11 to the second opening 12 in the present embodiment is a smooth curved surface, where the smooth curved surface adopts a streamline design, and the smooth curved surface extends from the first opening 11 to the second opening 12, where the first opening 11 corresponds to a bowl bottom of a bowl structure, and the second opening 12 corresponds to a bowl opening of the bowl structure.

Of course, the inertia disc main body 1 may also have an umbrella-shaped, horn-shaped, funnel-shaped or similar expansion structure.

A second embodiment of the present utility model provides a propeller shaft assembly including the above-described inertia disc, and any of the alternatives described above in relation to the embodiments of the inertia disc are also applicable to the embodiments of the propeller shaft assembly, and are not repeated herein. In this embodiment, the inertia disc is sleeved on the transmission shaft 2, and the transmission shaft 2 penetrates from the first opening 11 of the inertia disc main body 1 and penetrates from the second opening 12.

In some embodiments, as shown in fig. 1 to 5, when the inertia disc body 1 is disposed on the drive shaft 2, the first opening 11 is disposed toward the incoming flow direction of the dirt, that is, the head direction of the vehicle, so that the dirt sputtered from the front of the vehicle during running can impact the outer surface of the inertia disc body 1 through the first end 1a of the inertia disc body 1, and is thrown out through the groove 13 formed on the outer surface, thereby avoiding accumulation of the dirt in the member behind the inertia disc.

Specifically, as shown in fig. 1 to 5, the inertia disc according to the present embodiment is disposed on the drive shaft 2, where the drive shaft 2 may have a sectional structure, and includes a front section 21 and a rear section 22, where the front section 21 and the rear section 22 are connected by a connection device such as a universal joint, a support 211 is disposed at an end of the front section 21 near the rear section 22, the support 211 is rotatably connected to an end of the front section 21 by a bearing, and a rubber ring, for example, is disposed between the end of the front section 21 and the support 211. In order to achieve the connection between the front section 21 and the support 211, the diameter of the end of the front section 21 may be reduced, which may result in a recess formed between the end of the front section 21 and the support 211 and the bearing, and when the vehicle runs on a road surface with dirt, the dirt may form a collection in the recess, so that heat cannot be rapidly discharged, resulting in damage and failure of the bearing, and eventually damage to the drive shaft 2, resulting in loss of the vehicle.

In this embodiment, the inertia disc is disposed on the upstream side of the supporting member 211, that is, on the side of the supporting member 211 near the direction of the vehicle head, so that dirt splashed in the advancing direction of the vehicle can be prevented from entering the supporting member 211 by the inertia disc, in particular, dirt is prevented from entering the recess where the bearing is located, and the service life of the supporting member 211 and thus the transmission shaft 2 is effectively prolonged.

A third embodiment of the present utility model provides a vehicle including the above-described propeller shaft assembly, and any of the alternatives described above in relation to the propeller shaft assembly are also applicable to the vehicle embodiments, and are not repeated herein.

The embodiment of the utility model is assembled on the upstream side of the middle support piece of the transmission shaft in a press-fit welding mode, so that not only can the effects of rapidly throwing away dirt such as sediment and the like to prevent the sediment from impacting or even piling up, but also the dynamic balance of the transmission system can be better matched, the vibration noise of the transmission system is reduced, and the NVH performance of the whole vehicle is improved.

The above description is only illustrative of the preferred embodiments of the present utility model and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in the present utility model is not limited to the specific combinations of technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the spirit of the disclosure. Such as the above-mentioned features and the technical features disclosed in the present utility model (but not limited to) having similar functions are replaced with each other.

Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the utility model. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

Claims (10)

1. The inertia disc for the transmission shaft is characterized by comprising an inertia disc main body, wherein the inertia disc main body is of an expansion structure and is provided with a first opening and a second opening, the cross-sectional size of the first opening is smaller than that of the second opening, and the first opening is connected with the transmission shaft.

2. An inertia disc as claimed in claim 1, wherein the inertia disc body is bowl-shaped, the inertia disc body comprising a connecting portion, a transition portion and a mass portion, the connecting portion being connected to the drive shaft, the first opening being located on the connecting portion, the second opening being located on the mass portion.

3. The inertia disc of claim 1, wherein an outer surface of the inertia disc body is smoothly curved from the first opening to the second opening.

4. An inertia disc as claimed in claim 1, wherein at least one slot is provided in an outer surface of the inertia disc body, the slot extending from the first opening to the second opening.

5. An inertia disc as claimed in claim 4 wherein the plurality of slots are provided in a plurality, the plurality of slots being evenly disposed between the first opening and the second opening.

6. An inertia disc as claimed in claim 1 wherein the inner wall of the first opening is an interference fit with the surface of the drive shaft.

7. A drive shaft assembly comprising a drive shaft and an inertia disc according to any one of claims 1 to 6, the inertia disc being sleeved on the drive shaft, the drive shaft passing through the first opening and out the second opening.

8. The propeller shaft assembly of claim 7, wherein the first opening is disposed toward a head of the vehicle.

9. The propeller shaft assembly of claim 7, wherein the propeller shaft comprises a front section and a rear section, a support is provided at an end of the front section adjacent to the rear section, and the inertia disc is provided at a side of the support adjacent to the direction of the vehicle head.

10. A vehicle comprising the propeller shaft assembly of any one of claims 7-9.