CN211343941U

CN211343941U - Transmission assembly and output assembly

Info

Publication number: CN211343941U
Application number: CN201921734267.8U
Authority: CN
Inventors: 刘凡华; 乔广
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-08-25
Anticipated expiration: 2029-10-16

Abstract

The present application provides a transmission assembly and an output assembly. Wherein, the transmission component comprises an output gear and a supporting shaft; the output gear is provided with a through hole, and a plurality of buckles extend out from the inner wall of the through hole and protrude towards the axis of the through hole; the supporting shaft is provided with an engaging section which is matched with the shape of the inner surface of each buckle. The transmission assembly and the output assembly have the advantages of being simple in structure, easy to manufacture, convenient to install and the like, and installation performance of the transmission assembly can be improved, and manufacturing cost can be reduced.

Description

Transmission assembly and output assembly

Technical Field

The present application relates to the field of transmission system architectures. More particularly, the present application relates to a transmission assembly that aims to improve assembly efficiency and reduce manufacturing costs. The application also relates to an output assembly comprising the transmission assembly.

Background

It is known that output gear mechanisms are widely used to convert the high speed output of a motor to a relatively low speed rotational output. A typical output gear mechanism includes a worm and gear arrangement for speed reduction and torque multiplication. The support shaft of the output gear mechanism is attached to the central axis of the output gear by a snap ring and washer mounted around it. The supporting shaft is provided with a corresponding groove for installing the clamping ring. The snap ring and the shim together provide radial and axial restraint for the support shaft.

However, the above-described conventional structure requires the support shaft, the spacer, and the snap ring to be sequentially mounted, and also requires an additional inspection device to check whether the spacer and the snap ring have been correctly mounted. The above installation steps and tools reduce assembly efficiency and increase manufacturing costs.

Accordingly, there is a continuing need for a new transmission assembly and output assembly solution that is capable of providing improved assembly efficiency and reduced manufacturing costs for the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

It is an object of an aspect of the present application to provide a transmission assembly which aims to provide improved assemblability. It is an object of another aspect of the present application to provide an output assembly including the transmission assembly described above.

The purpose of the application is realized by the following technical scheme:

a drive assembly, comprising:

the output gear is provided with a through hole, and a plurality of buckles extend out from the inner wall of the through hole and protrude towards the axis (A-A) of the through hole; and

and the support shaft is provided with an engagement section matched with the shape of the inner surface of each buckle.

In the above transmission assembly, optionally, the engagement section of the support shaft is configured to form a truncated cone shape, and an inner surface of each of the catches is shaped to fit an outer surface of the engagement section.

In the above transmission assembly, optionally, the catch is attached to the inner wall of the through hole by a connection at the end.

In the above transmission assembly, optionally, the catch is configured to form a predetermined angle with an axis of the through hole.

In the above transmission assembly, optionally, the catch, the connecting portion, and the output gear are configured as one body.

In the above transmission assembly, optionally, the catch and the connecting portion are configured to be made of an elastic material.

In the above transmission assembly, optionally, a seal ring attached between the support shaft and an inner wall of the through hole is further included.

In the transmission assembly, one or more oil reservoirs disposed in the snap ring may be optionally further included.

In the above transmission assembly, optionally, a groove is formed at one end of the engagement section, and a tip of the catch is configured to catch at the groove.

An output assembly, comprising:

an electric drive;

a worm to which an output of the electric drive is attached; and

the drive assembly wherein the periphery of the output gear is configured with teeth adapted to engage the worm such that the output gear meshes with the worm to worm the gear arrangement.

The transmission assembly and the output assembly have the advantages of being simple in structure, easy to manufacture, convenient to use and the like, and installation performance of the transmission assembly can be improved, and manufacturing cost can be reduced.

Drawings

The present application will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a cross-sectional schematic view of one embodiment of the output assembly of the present application as installed in place.

FIG. 2 is a perspective view of the output gear of the embodiment shown in FIG. 1.

Fig. 3 is a partial top view of the output gear of the embodiment shown in fig. 2.

FIG. 4 is a partial cross-sectional perspective view of the output gear of the embodiment shown in FIG. 2.

Fig. 5 is a front view of the support shaft of the embodiment shown in fig. 1.

Fig. 6 is a perspective view of the support shaft of the embodiment shown in fig. 5.

Fig. 7 is a cross-sectional perspective view of the embodiment of fig. 1 during installation.

FIG. 8 is a cross-sectional perspective view of the embodiment of FIG. 1 after installation in place.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the terms top, bottom, upward, downward and the like are defined relative to the directions in the drawings, and they are relative terms, and thus can be changed according to the different positions and different practical states in which they are located. These and other directional terms should not be construed as limiting terms.

Furthermore, it should be further noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application not directly mentioned herein.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

In accordance with the drawings and the following detailed description, embodiments of the present application provide a novel connection structure for between an output gear and a support shaft, and also provide a transmission assembly and an output assembly including the above connection structure.

FIG. 1 is a cross-sectional schematic view of one embodiment of the output assembly of the present application as installed in place. The transmission assembly 100 according to the present application includes an output gear 110 and a support shaft 120. The output gear 110 is configured as a worm wheel, and is mounted in the housing 140 together with the worm 130. The worm 130 is driven by a motor not shown. The drive assembly 100 and the worm 130 together form an output assembly. The output assembly may be used in known electric drives or motors.

The output gear 110 is provided with a through hole 111, and the through hole 111 is configured to extend along an axis a-a of the output gear 110. Thus, the axis A-A also constitutes the axis of the through-hole 111. A plurality of catches 112 extend from an inner wall of the through-hole 111 and project toward the axis A-A. The structure of the catch 112 is described in detail below. Correspondingly, the support shaft 120 is provided with an engagement section matching the shape of the inner surface of each of the catches 112. The structure of the engagement section will be described in detail below with reference to the accompanying drawings. In the embodiment shown in fig. 1, the support shaft 120 has been mounted in place and the inner surface of the catch 112 fits over the engagement section of the support shaft 120 and snaps into place at the slot at one end of the engagement section.

Although not shown, one or more sealing rings may also be mounted on the support shaft 120. The sealing ring is intended to be arranged between the outer surface of the support shaft 120 and the inner surface of the through hole 111. For example, a sealing ring may be provided below the section of fig. 1 where the support shaft 120 engages the catch 112 to provide the desired sealing function.

An output assembly according to one embodiment of the present application may be used to transmit the output of a window motor on a vehicle. However, the transmission assembly and output assembly according to the present application may be used in other suitable applications as desired.

Fig. 2 is a perspective view of the output gear of the embodiment shown in fig. 1, fig. 3 is a partial top view of the output gear of the embodiment shown in fig. 2, and fig. 4 is a partial cross-sectional perspective view of the output gear of the embodiment shown in fig. 2. In the illustrated embodiment, four catches 112 are provided in the through-hole 111 of the output gear 110. The respective snaps 112 are attached to the inner wall of the through-hole 111 by a connection portion 113 at one end thereof, respectively. Each of the catches 112 is configured to form a symmetrical structure about the axis a-a, and an inner surface of each of the catches 112 is formed substantially in a shape adapted to engage with a side surface of a truncated cone shape of the truncated cone-shaped engagement section 121 of the support shaft 120. The individual catches 112 are separated by gaps 114. The inner surface of the catch 112 may be formed as part of a truncated cone shape, a cylindrical shape, or a conical shape, as desired.

The catch 112 is configured to form a predetermined angle with the axis a-a to provide the angled shape as shown. More or fewer snaps than the illustrated embodiment may be provided, as desired.

Although not shown, one or more oil reservoirs may be provided in the catch 112 to provide a lubricant storage function.

The output gear 110, the catch 112, and the connection portion 113 may be configured as one body, and at least the catch 112 and the connection portion 113 may be made of an elastic material. For example, the above-described respective components may be integrally formed by a molding process. In one embodiment, the output gear 110, the catch 112 and the connecting portion 113 are made of an elastic material and are an integrally molded structure. The resilient material includes, but is not limited to, plastic and the like. By making the above components of an elastic material, the catch 112 and the connecting portion 113 can be deformed to some extent, thereby providing corresponding convenience in assembly.

Further, as shown in fig. 2, a plurality of teeth portions 115 are provided on an outer circumference of the output gear 110 so as to mesh and transmit with a not-shown worm 130.

Fig. 5 is a front view of the support shaft of the embodiment shown in fig. 1, and fig. 6 is a perspective view of the support shaft of the embodiment shown in fig. 5. The support shaft 120 is configured in a substantially cylindrical structure, and an engagement section 121 matching the shape of the inner surface of each of the catches 112 is formed at the middle of the support shaft 120. The engaging section 121 may be configured to have an inclined shape so as to form an outer surface having a truncated cone shape. In the engaging section 121, a groove 122 is formed at one end of the support shaft 120 having a smaller diameter. The slot 122 is used to engage the end of the catch 112 when the output gear 110 is engaged with the support shaft 120 to secure the catch 112 in place. Therefore, the diameter of the support shaft 120 at the engaging section 121 is smaller than that at the other sections, and the diameter of the support shaft 120 at the groove 122 is the smallest.

In the illustrated embodiment, the edges of both ends of the support shaft 120 are provided with rounded corners, and one or more grooves may be optionally further provided on the support shaft 120 in order to accommodate other components not shown. For example, the groove may be used for mounting a not shown sealing ring or the like.

The support shaft 120 may be made of a metallic material, and the grooves and engagement sections on the support shaft 120 may be formed by casting and/or machining.

FIG. 7 is a cross-sectional perspective view of the embodiment of FIG. 1 during installation, and FIG. 8 is a cross-sectional perspective view of the embodiment of FIG. 1 after installation in place. During assembly, the support shaft 120 may be fixed, and after the axis a-a of the output gear 110 is aligned with the axis of the support shaft, the output gear 110 is moved from top to bottom so that the support shaft 120 enters the through hole 111 from bottom to top. The catch 112 first comes into contact with the upper portion of the support shaft 120. Since the upper portion of the support shaft 120 has a relatively large diameter, each of the catches 112 is deformed in conformity with the outer shape of the support shaft 120, so that the output gear 110 can continue to move downward. When the tip of the catch 112 is moved to the position of the slot 122, the catch 112 will tend to deflect in the direction of the axis a-a under the influence of the spring force and thus enter into engagement with the slot 122. In this case, as shown in fig. 8, the inner surface of the catch 112 will abut on the outer surface of the engagement section 121 of the support shaft 120, and the tip of the catch 112 abuts at the groove 122. After assembly is complete, the mating structure of the engagement section 121 and the catch 112 will provide restraint in various directions, for example, at least in an axial direction.

Similarly, in another embodiment, the output gear 110 may be fixed and the support shaft 120 may be moved from bottom to top, which also achieves a similar assembly effect.

Compared with the prior art, the transmission assembly and the output assembly do not need to be provided with the snap ring and the gasket, so that the manufacturing cost of parts is reduced, and the weight of the whole structure is also reduced. Further, the transmission assembly and the output assembly of the present application can be assembled in place with only a single operation, thereby improving manufacturing efficiency and assemblability.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the claims and encompasses other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of protection defined by the claims of this application, provided that they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims

1. A transmission assembly (100), comprising:

an output gear (110), wherein the output gear (110) is provided with a through hole (111), and a plurality of buckles (112) extend out from the inner wall of the through hole (111) and protrude towards the axis (A-A) of the through hole (111); and

a support shaft (120), wherein an engagement section (121) matched with the shape of the inner surface of each buckle (112) is formed on the support shaft (120).

2. The transmission assembly according to claim 1, characterized in that the engagement section (121) of the support shaft (120) is configured to form a truncated-cone shape, and an inner surface of each of the catches (112) is shaped to conform to an outer surface of the engagement section (121).

3. Transmission assembly according to claim 1, characterized in that the snap (112) is attached to the inner wall of the through hole (111) by a connection (113) at the end.

4. Transmission assembly according to claim 3, characterized in that said catch (112) is configured to form a predetermined angle with the axis (A-A) of said through hole (111).

5. Transmission assembly according to claim 3, characterized in that said catch (112), said connection (113) and said output gear (110) are configured as one piece.

6. Transmission assembly according to claim 5, characterized in that said catch (112) and said connection (113) are configured to be made of an elastic material.

7. Transmission assembly according to any one of claims 1 to 6, further comprising a sealing ring attached between the support shaft (120) and the inner wall of the through hole (A-A).

8. The drive assembly according to any one of claims 1-6, further comprising one or more oil reservoirs disposed in the catch (112).

9. Transmission assembly according to any of the claims 1-6, wherein the engagement section (121) at one end forms a groove (122), and the end of the catch (112) is configured to snap in at the groove (122).

10. An output assembly, comprising:

an electric drive;

a worm (130), an output of the electric drive being attached to the worm (130); and

the transmission assembly (100) according to any one of claims 1 to 9, wherein the periphery of the output gear (110) is configured with a toothed portion (115) adapted to engage with the worm (130) such that the output gear (110) meshes with the worm (130) to form a worm gear arrangement.