CN213628557U

CN213628557U - Lightweight transmission shaft

Info

Publication number: CN213628557U
Application number: CN202022048357.0U
Authority: CN
Inventors: 颜永生
Original assignee: Chongqing Transmission Shaft Co ltd
Current assignee: Chongqing Transmission Shaft Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-07-06
Anticipated expiration: 2030-09-17

Abstract

The utility model relates to a transmission shaft field of making, concretely relates to lightweight transmission shaft. The shaft tube is characterized by comprising a shaft tube and a first shaft, wherein one end of the shaft tube is fixed with the first shaft and the shaft tube is coaxial with the first shaft; the external diameter more than or equal to 18cm, length more than or equal to 80cm of central siphon, the primary shaft includes slip fork and axle sleeve, axle sleeve pot head establish at the slip fork tip and with slip fork sliding connection, the axle sleeve is kept away from slip fork one end and is fixed with the central siphon. The utility model provides a lightweight transmission shaft does not need the intermediate strut assembly to support to guarantee that the transmission shaft can adapt to different motorcycle types.

Description

Lightweight transmission shaft

Technical Field

The utility model relates to a transmission shaft field of making, concretely relates to lightweight transmission shaft.

Background

The existing transmission shaft is usually of a multi-section structure and comprises a shaft tube, a first shaft and a second shaft, wherein the shaft tube is connected with the first shaft, the first shaft is connected with the second shaft through a universal joint, and one ends, far away from the first shaft, of the shaft tube and the second shaft are connected with a flange plate through the universal joint. When the transmission shaft is installed, due to the existence of the three universal joints, the first shaft, the second shaft and the shaft tube can swing downwards under the neutral action, so that the transmission shaft can not be normally used, the middle support assembly is usually arranged below the second shaft and is installed on other structures of an automobile to support the second shaft, the second shaft is prevented from swinging downwards, namely the second shaft is limited, and the first shaft and the shaft tube can be prevented from swinging under the condition that the second shaft cannot swing, so that the transmission shaft can normally work.

However, different vehicle types have different structures, and other structures for installing the middle support assembly are not arranged below the transmission shafts of some vehicle types, so that the second shaft cannot be supported, and the transmission shafts cannot work normally.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it does not need the intermediate strut assembly to carry out the lightweight transmission shaft that supports to it can adapt to different motorcycle types to guarantee the transmission shaft.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a lightweight transmission shaft comprises a shaft tube and a first shaft, wherein one end of the shaft tube is fixed with the first shaft, and the shaft tube is coaxial with the first shaft; the outer diameter of the shaft tube is more than or equal to 18cm, and the length of the shaft tube is more than or equal to 80 cm.

The beneficial effect in this scheme does:

1. the length of central siphon in this scheme is great, multisection structure in the fungible traditional transmission shaft, only be equipped with the primary shaft in this scheme promptly, primary shaft one end is fixed with the central siphon, and the other end passes through the universal joint and is connected with the ring flange, only sets up two universal joints during the transmission shaft installation in this scheme promptly, compares with traditional transmission shaft, owing to reduced the quantity of universal joint, need not to set up the support assembly and can avoid the central siphon downswing, is adapted to the car of the unable erection bracing assembly in transmission shaft below. And the diameter increase of central siphon in this scheme, intensity increase in step can satisfy the critical speed requirement of transmission shaft under the great condition of central siphon length, avoids the transmission shaft to take place to beat under critical speed, guarantees that the transmission shaft can normally work.

2. Because the number of universal joints is reduced and structures such as an intermediate support assembly and a second shaft are omitted, the total weight of the transmission shaft in the scheme can be reduced by more than 50%, the tonnage of equipment for forging the transmission shaft can be reduced while the usage amount of raw materials is reduced, the power consumption and the heating energy consumption during processing are saved, and meanwhile, the mold cost is saved, so that the production cost of the transmission shaft is lower.

3. The transmission shaft in this scheme only includes primary shaft and central siphon, and primary shaft and central siphon fixed connection, so during the installation, relative rotation can not appear between primary shaft and the central siphon for the installation degree of difficulty is lower.

Further, the shaft tube is tubular.

The beneficial effect in this scheme does: under the condition that the material quality, length and diameter are the same, the weight of tubular central siphon is lighter, can further reduce the raw materials quantity, reduces the tonnage of forging apparatus simultaneously, and the transmission shaft installation back, the car is lighter.

Further, the central siphon includes the strengthening section and lies in the throat section of strengthening section both sides, and the internal diameter that the strengthening section one end was kept away from to two throat sections is less than the internal diameter of the other end.

The beneficial effect in this scheme does: compare with the central siphon in this scheme, the diameter of the central siphon in the traditional transmission shaft is littleer, but the ring flange and the universal joint that traditional central siphon is connected are less, and the internal diameter of the necking down section in this scheme is less, can be connected with it under the condition that need not change traditional ring flange and universal joint, and adaptability is better.

Further, the necking section is formed by inward necking extrusion.

The beneficial effect in this scheme does: when the extrusion is carried out, the diameter and the thickness of the necking section are reduced, so that the strength of the necking section is increased, and the service life is prolonged.

Furthermore, the necking section and the reinforcing section are in smooth transition.

The beneficial effect in this scheme does: and no convex side edge is arranged between the necking section and the reinforcing section, so that adverse influence on installation caused by the side edge is avoided.

Further, the throat section adjacent the first shaft is in interference fit with the first shaft.

The beneficial effect in this scheme does: the necking section and the first shaft in the scheme can be fixed without additional fasteners, and the installation method is simple.

Further, the necking section is welded and fixed with the first shaft.

The beneficial effect in this scheme does: the welding is carried out again when adopting interference fit's mode to fix, can improve the fixed effect of throat section and primary shaft, further avoids the fixed damage that appears between throat section and the primary shaft.

Further, the throat section is kept away from enhancement section one end and is fixed with the extension section, and the one end that the primary shaft is close to the throat section is equipped with the opening towards the fixed slot of throat section, extension section and fixed slot interference fit, and the external diameter and the internal diameter of extension section equal with the external diameter and the internal diameter that the throat section is close to extension section one end respectively.

The beneficial effect in this scheme does: when the first shaft is fixed with the necking section, the outer wall of the extension section is attached to the side wall of the fixing groove, so that the contact area between the extension section and the fixing groove can be increased, and the fixing effect is improved.

Further, the length of the extension section is more than or equal to 10 mm.

The beneficial effect in this scheme does: the length of extension section is longer, and the area of contact of extension section and fixed slot is bigger, and fixed effect is better.

Furthermore, the first shaft comprises a sliding fork and a shaft sleeve, one end of the shaft sleeve is sleeved at the end part of the sliding fork and is in sliding connection with the sliding fork, and one end, far away from the sliding fork, of the shaft sleeve is fixed with the shaft tube.

The beneficial effect of this scheme does: the transmission shaft in this scheme is in the use, and axle sleeve slip fork relatively slides to make the transmission shaft can stretch out and draw back.

Drawings

Fig. 1 is a front partial sectional view of embodiment 1 of the present invention;

fig. 2 is a front partial sectional view of embodiment 2 of the present invention;

FIG. 3 is a front partial sectional view of a bottom bracket tube according to embodiment 3 of the present invention;

fig. 4 is a front partial sectional view of embodiment 4 of the present invention;

FIG. 5 is a front vertical cross-sectional view of a bottom bracket tube in embodiment 5 of the present invention;

fig. 6 is a front vertical cross-sectional view of a bottom bracket tube in embodiment 6 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the shaft tube 1, the reinforcing section 11, the necking section 12, the extending section 13, the groove 14, the first shaft 2, the sliding fork 21, the shaft sleeve 22 and the sliding groove 23.

Example 1

A lightweight transmission shaft comprises a shaft tube 1 and a first shaft 2, wherein one end of the shaft tube 1 is coaxial with the first shaft 2, the shaft tube 1 in the embodiment is tubular, the outer diameter of the shaft tube 1 is greater than or equal to 18cm, the length of the shaft tube 1 is greater than or equal to 80cm, and specifically, the outer diameter of the shaft tube 1 in the embodiment is 18cm, and the length of the shaft tube is 89 cm.

Specifically, the shaft tube 1 in this embodiment includes a reinforcing section 11 and a necking section 12 located at the left and right ends of the reinforcing section 11, the necking section 12 and the reinforcing section 11 in this embodiment are integrally formed, and the necking section 12 and the reinforcing section 11 are in smooth transition. The external diameter of the right end of the necking section 12 on the right side is the same as the external diameter of the right end of the central axis tube 1 of the traditional transmission shaft, so that the necking section 12 in the embodiment can be connected with the traditional universal joint. During processing, the pipe-shaped structure with the same outer diameter and thickness as the reinforcing section 11 is adopted for inward necking extrusion forming, so the thickness of the necking section 12 is larger than that of the reinforcing section 11.

The first shaft 2 is located at the left side of the shaft tube 1, the diameter of the first shaft 2 in this embodiment is smaller than the outer diameter of the necking section 12, and the right end of the first shaft 2 is in interference fit with the necking section 12.

When the transmission shaft in this embodiment is used, the left end of the first shaft 2 and the right end of the shaft tube 1 are both connected with the universal joint yoke of the universal joint, and the specific connection mode is the same as that of the conventional transmission shaft and the universal joint in the prior art, and is not repeated in this embodiment. Because the transmission shaft in the embodiment only comprises the shaft tube 1 and the first shaft 2, namely the transmission shaft is of a two-section structure, after the transmission shaft is connected with the universal joint, the situation that the middle part of the transmission shaft is inclined downwards is avoided, the first shaft 2 and the shaft tube 1 do not need to be supported, a middle support assembly can be omitted, the structure is simplified, the weight is reduced, and meanwhile the transmission shaft is suitable for a vehicle without the middle support assembly arranged below the transmission shaft.

Example 2

On the basis of embodiment 1, as shown in fig. 2, the throat section 12 and the first shaft 2 in this embodiment are fixed by welding on the basis of interference fit, and during specific installation, the right end of the first shaft 2 and the throat section 12 on the left side are in interference fit first, and then the joint is fixed by welding, so that the fixing effect of the first shaft 2 and the throat section 12 is enhanced. Otherwise, the other installation manners in this embodiment are the same as those in embodiment 1, and are not described again in this embodiment.

Example 3

Based on the embodiment 2, as shown in fig. 3, a tubular extension section 13 is integrally formed at one end of the necking section 12 away from the reinforcing section 11 in the embodiment, the inner diameter and the outer diameter of the extension section 13 are equal to the inner diameter and the outer diameter of the end of the necking section 12 away from the reinforcing section 11, respectively, the length of the extension section 13 in the embodiment is greater than or equal to 10mm, specifically, the length of the extension section 13 in the embodiment is 10 mm. The 2 right-hand members of primary shaft are equipped with the opening fixed slot towards the right side, fixed slot and the 13 interference fit of left extension segment, the increase with the area of contact of fixed slot to further improve the fixed effect of central siphon 1 and primary shaft 2. Otherwise, the other installation manners in this embodiment are the same as those in embodiment 1, and are not described again in this embodiment.

Example 4

In embodiment 2 or embodiment 3, as shown in fig. 4, the first shaft 2 in this embodiment includes a sliding fork 21 and a shaft sleeve 22, the left end of the shaft sleeve 22 is provided with a sliding groove 23 with an opening facing left, the shaft sleeve 22 is sleeved on the right end of the sliding fork 21, and the right end of the sliding fork 21 is located in the sliding groove 23. The shaft sleeve 22 is provided with an internal spline, and the shaft sleeve 22 is slidably connected with the right end of the sliding fork 21 through the spline. In this embodiment, the fixing groove is located at the right end of the boss 22. During the transmission shaft installation in this embodiment, fixed through the welding behind the right-hand member of axle sleeve 22 and the left necking down section 12 interference fit, the left end of slip fork 21 and necking down section 12 on right side pass through the universal joint and the ring flange is fixed, and the transmission shaft is when using, and the both ends of transmission shaft can receive the effort, but relative slip between slip fork 21 and the axle sleeve 22 in this embodiment under the effort to avoid the transmission shaft to take place to warp. Otherwise, the other installation manners in this embodiment are the same as those in embodiment 1, and are not described again in this embodiment.

Example 5

On the basis of embodiment 4, as shown in fig. 5, a plurality of grooves 14 are provided on both the end of the necking segment 12 away from the reinforcing segment 11 and the extension segment 13 in this embodiment, and the plurality of grooves 14 are distributed along the circumferential direction of the extension segment 13. When the shaft sleeve 22 in the embodiment is in interference fit with the necking section 12, the existence of the groove 14 provides a space for deformation of the extension section 13 and the necking section 12, and inward deformation of the necking section 12 caused by overlarge deformation is avoided.

Example 6

On the basis of embodiment 5, as shown in fig. 6, the grooves 14 of the necking section 12 and the extension section 13 in this embodiment are aligned and communicated. When welding, the solder can enter the groove 14 on the extension section 13 through the groove 14 on the necking section 12, so that the solder can weld the shaft sleeve 22 and the extension section 13, and the welding effect is further improved.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A lightweight drive shaft characterized by: the device comprises an axle tube and a first shaft, wherein one end of the axle tube is fixed with the first shaft and is coaxial with the first shaft; the outer diameter of the shaft tube is more than or equal to 18cm, and the length of the shaft tube is more than or equal to 80 cm; the first shaft comprises a sliding fork and a shaft sleeve, one end of the shaft sleeve is sleeved at the end part of the sliding fork and is in sliding connection with the sliding fork, and one end, far away from the sliding fork, of the shaft sleeve is fixed with the shaft tube.

2. A lightweight drive shaft according to claim 1, wherein: the shaft tube is tubular.

3. A lightweight drive shaft according to claim 2, wherein: the central siphon includes the enhancement section and lies in the throat section of enhancement section both sides, and the internal diameter that the enhancement section one end was kept away from to two throat sections is less than the internal diameter of the other end.

4. A lightweight drive shaft according to claim 3, wherein: the necking section is formed by inward necking and extrusion.

5. The lightweight propeller shaft according to claim 4, wherein: the necking section and the reinforcing section are in smooth transition.

6. A lightweight drive shaft according to claim 3, wherein: the necking section close to the first shaft is in interference fit with the first shaft.

7. A lightweight drive shaft according to claim 6, wherein: the necking section is welded and fixed with the first shaft.

8. A lightweight drive shaft according to claim 3, wherein: an extension section is fixed at one end, far away from the reinforcing section, of the necking section, a fixing groove with an opening facing the necking section is formed in one end, close to the necking section, of the first shaft, the extension section is in interference fit with the fixing groove, and the outer diameter and the inner diameter of the extension section are equal to those of one end, close to the extension section, of the necking section.

9. A lightweight drive shaft according to claim 8, wherein: the length of the extension section is more than or equal to 10 mm.