阅读说明：本技术 紧凑型高负载预供能器 (Compact high-load pre-power supplier ) 是由 M·V·费尔南德斯 J·R·费尔南德斯 G·G·比亚焦 于 2020-02-13 设计创作，主要内容包括：本发明公开了一种同步器组件(10),该同步器组件具有毂(12),该毂包括形成于毂上的外齿(14)。该毂具有形成于其中的至少一个凹陷部。包括形成于其上的内齿(18)的换挡套筒(16)围绕毂设置。预供能器组件(8)设置在该至少一个凹陷部中。该预供能器组件包括设置在凹陷部中的外壳(22)。该外壳具有形成于其中的两个分离的孔口(36)。弹簧(38)设置在两个分离的孔口中的每一个中。轴承构件(40)设置在两个分离的孔口中的每一个中,并且由两个弹簧偏置,从而向换挡套筒施加力。(A synchronizer assembly (10) is disclosed having a hub (12) including external teeth (14) formed thereon. The hub has at least one recess formed therein. A shift sleeve (16) including internal teeth (18) formed thereon is disposed about the hub. A pre-energizer assembly (8) is arranged in the at least one recess. The pre-energizer assembly comprises a housing (22) disposed in the recess. The housing has two separate apertures (36) formed therein. A spring (38) is disposed in each of the two separate apertures. A bearing member (40) is disposed in each of the two separate apertures and is biased by two springs to apply a force to the shift sleeve.)

1. A synchronizer assembly comprising:

a hub including external teeth formed thereon, the hub having at least one recess formed therein;

a shift sleeve including internal teeth formed thereon, the shift sleeve disposed about the hub;

a pre-energizer assembly disposed in the at least one recess, the pre-energizer assembly comprising: a housing disposed in the recess and having two separate apertures formed therein; a spring disposed in each of the two separate apertures; a bearing member disposed in each of the two separate apertures and biased by the two springs to apply a force to the shift sleeve.

2. The synchronizer assembly of claim 1 wherein each of the bearings applies the force parallel to the other bearing.

3. The synchronizer assembly of claim 1, wherein the hub includes a plurality of recesses formed therein, each of the recesses including the pre-energizer assembly disposed therein.

4. The synchronizer assembly according to claim 1, wherein the housing comprises a rectangular base extending to an upper portion having a top surface with a middle portion bounded by two angled portions.

5. The synchronizer assembly according to claim 4, wherein the two apertures are formed in the intermediate portion.

6. The synchronizer assembly according to claim 4, wherein the two apertures extend through the top surface to a bottom surface defining a spring seat.

7. The synchronizer assembly of claim 1 wherein the housing includes an axial length and a longitudinal length, the two separate apertures being positioned along the longitudinal length of the housing.

8. A synchronizer assembly comprising:

a hub including external teeth formed thereon, the hub having at least one recess formed therein, the recess having a predefined axial length and a predefined longitudinal length;

a shift sleeve including internal teeth formed thereon, the shift sleeve disposed about the hub;

a pre-energizer assembly disposed in the at least one recess, the pre-energizer assembly comprising: a housing disposed in the recess and having two separate apertures formed therein along a longitudinal length of the housing; a spring disposed in each of the two separate apertures; a bearing member disposed in each of the two separate apertures and biased by the two springs to apply a force to the shift sleeve.

9. The synchronizer assembly according to claim 8, wherein each of the bearings applies the force parallel to the other bearing.

10. The synchronizer assembly of claim 8, wherein the hub includes a plurality of recesses formed therein, each of the recesses including the pre-energizer assembly disposed therein.

11. The synchronizer assembly according to claim 8, wherein the housing comprises a rectangular base extending to an upper portion having a top surface with a middle portion bounded by two angled portions.

12. The synchronizer assembly according to claim 11, wherein the two apertures are formed in the intermediate portion.

13. The synchronizer assembly according to claim 11, wherein the two apertures extend through the top surface to a bottom surface defining a spring seat.

Technical Field

The present invention relates to a synchronizer structure of a motor vehicle, and more particularly to a pre-energizer structure of a synchronizer of a motor vehicle.

Background

Synchronizers may be used with the transmission to shift between various gears. The synchronizer may include a pre-energizing structure to increase the engagement force of the friction surfaces by providing additional axial force to the synchronizer sleeve.

The pre-energizing structure may comprise spring-loaded balls or rollers fixed in a cage. The structure may be disposed on a circumference of the synchronizer body and positioned between a groove in the synchronizer hub and an internal groove in the shift sleeve. The pre-energizing structure is rotatable with the synchronizer hub and axially movable with the shift sleeve. The pre-energizing structure generates a load on the synchronizer ring to perform the synchronization process. The pre-energizing structure may also keep the sliding sleeve centered on the hub between the two gears and below the limit of the axial force.

Generally, a high pre-charging load is necessary for faster shifts. However, increasing the number or size of the pre-energizing structures may require increasing the size of various components of the transmission, which is undesirable.

It is desirable to have a pre-energizing structure that increases the load without increasing the size of the pre-energizing structure.

Disclosure of Invention

In one aspect, the present disclosure discloses a synchronizer assembly having a hub including external teeth formed thereon. The hub has at least one recess formed therein. A shift sleeve including internal teeth formed thereon is disposed about the hub. A pre-energizer assembly is disposed in the at least one recess. The pre-energizer assembly comprises a housing disposed in the recess. The housing has two separate apertures formed therein. A spring is disposed in each of the two separate apertures. A bearing member is disposed in each of the two separate apertures and is biased by two springs to apply a force to the shift sleeve.

In another aspect, a synchronizer assembly is disclosed having a hub including external teeth formed thereon. The hub has at least one recess formed therein. The recess includes a predefined axial length and a predefined longitudinal length. A shift sleeve including internal teeth formed thereon is disposed about the hub. A pre-energizer assembly is disposed in the at least one recess. The pre-energizer assembly comprises a housing disposed in the recess. The housing has two separate apertures formed therein along a longitudinal length of the housing. A spring is disposed in each of the two separate apertures. A bearing member is disposed in each of the two separate apertures and is biased by two springs, applying a force to the shift sleeve while maintaining a predefined length of the recess.

Drawings

FIG. 1 is a partial perspective cutaway view of a hub, shift sleeve and pre-energizer assembly;

FIG. 2 is a perspective view of a pre-energizer assembly;

FIG. 3 is a partial perspective view of the hub and pre-energizer assembly;

FIG. 4A is a partial, comparative perspective view of a hub and pre-energizer assembly;

FIG. 4B is a partially contrasting perspective view of a prior art hub and pre-energizer assembly.

Detailed Description

Embodiments of the present disclosure relate to a pre-energizer assembly 8 for a synchronizer assembly 10. Referring to fig. 1-3, the synchronizer assembly 10 includes a hub 12 that is securable to a shaft. The hub 12 includes external teeth 14 formed on the outer circumference of the hub 12. A shift sleeve 16 is disposed about the hub 12 and includes internal teeth 18 formed thereon that mesh with the external teeth 14 of the hub 12.

The hub 12 may include various numbers of recesses 20 formed therein about the diameter of the hub 12. In one aspect, at least one recess 20 is formed in the hub 12. The hub 12 may include two recesses 20 formed therein, or may include a plurality of recesses 20 formed therein. Each recess 20 includes an axial length 21 and a longitudinal length 23 that define the opening dimensions of the recess 20, as best shown in fig. 3.

The pre-energizer assembly 8 is disposed in the recess 20 and acts on the shift sleeve 16 to apply a force to the shift sleeve 16. The pre-energizer assembly 8 comprises a housing 22 held in the recess 20. The housing 22 includes a body 24 having a generally rectangular base 26 extending to an upper portion 28. The upper portion 28 includes a top surface 30 having a middle portion 32 bounded by two angled portions 34. The housing 22 includes two separate apertures 36 formed therein. An aperture 36 may be formed in the intermediate portion 32. The housing 22 includes an axial length 25 and a longitudinal length 27 corresponding to the dimensions of the recess 20 as described above. In one aspect, the separate apertures 36 are located along the longitudinal length 27 of the housing 22.

Each of the apertures 36 extends from the top surface 30 to the bottom surface 31 and is less than the overall thickness of the housing 22. Each of the apertures 36 receives a spring 38 disposed therein. The bottom surface 31 serves as a seat for the spring 38. The spring 38 biases the bearing member 40 toward the shift sleeve 16. The bearings 40 exert forces parallel to each other and provide twice the load as compared to a single bearing 40 such as shown in comparing fig. 4A and 4B.

One advantage of having a pre-energizer assembly 8 with two bearings 40 and a spring 38 is that the pre-energizer assembly 8 can apply twice the pre-energizing load without increasing the axial length 21 of the recess 20 or the axial length 25 of the housing 22. An increase in axial length 21, 25 would require an increase in variator length to maintain the same gear strength and is undesirable.

Another advantage is that the pre-energizer assembly 8 may be used to convert a manual transmission into an automatic transmission. For example, automatic transmissions typically shift faster and require higher pre-power loads than manual transmissions. This problem can be solved by using a pre-energizer assembly 8 having the same axial length but applying twice the load to achieve faster gear shifting.

The pre-energizer assembly 8 allows simple retrofitting of a manual transmission without increasing the axial length of the hub 12. In one aspect, the prior art pre-energizer would require an increase in ball diameter and spring diameter, such that the synchronizer ring would have to be moved away to accommodate the larger pre-energizer configuration, and this movement would have an effect on all adjacent components, resulting in a longer drive.

In one aspect, the maximum spring load of the prior art pre-energizer shown in fig. 4B may be about 29N. The pre-energizer assembly 8 shown in fig. 1-4A with two springs 38 and a bearing member 40 may exert twice the maximum load of about 58N while maintaining the same radial length.