CN219673232U - Speed reducer and driving device - Google Patents

Abstract

The embodiment of the utility model provides a speed reducer and a driving device, wherein the speed reducer comprises: a transmission mechanism; an output portion located radially outward of the transmission mechanism and engaged with the transmission mechanism; a fixed portion, at least a portion of which is located radially inward of the output portion; a first bearing provided between the output portion and the fixed portion; and a cover plate covering the first bearing. According to the embodiment of the utility model, foreign matters can be prevented from invading the first bearing, and the performance of the speed reducer is prevented from being influenced.

Description

Speed reducer and driving device

Technical Field

The utility model relates to the technical field of electromechanics, in particular to a speed reducer and a driving device.

Background

Speed reducers have been widely used at present, which may include at least a transmission mechanism, an output portion, and a fixed portion (such as a planetary gear holder, a casing, etc.) that is held fixed with respect to the output portion, and typically, a bearing is provided between the output portion and the fixed portion.

The inventors have found that in the conventional speed reducer, a bearing provided between an output portion and a fixed portion is often exposed to an external environment, and foreign matter such as dust is liable to intrude into the bearing to deteriorate the bearing.

It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present utility model and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the utility model section.

Disclosure of Invention

In order to solve at least one of the above problems or other similar problems, an embodiment of the present utility model provides a speed reducer and a driving device capable of preventing foreign matters from entering a bearing between an output part and a fixed part, ensuring performance of the speed reducer.

According to an embodiment of the first aspect of the present utility model, there is provided a speed reducer including:

a transmission mechanism;

an output portion located radially outward of the transmission mechanism and engaged with the transmission mechanism;

a fixed portion, at least a portion of which is located radially inward of the output portion;

a first bearing provided between the output portion and the fixed portion; and

and a cover plate covering the first bearing.

In one or more of the embodiments described herein,

the cover plate is fixed to the output portion, a gap is formed between the end portion, close to the fixing portion, of the cover plate and the fixing portion, and a labyrinth structure is formed by the cover plate, the fixing portion and the space between the cover plate and the first bearing.

In one or more of the embodiments described herein,

the cover plate is fixed to an end portion of the output portion on one axial side by penetrating the cover plate with a bolt, and an end surface of the bolt on one axial side is not exposed to an end surface of the fixing portion on one axial side.

In one or more of the embodiments described herein,

the radial periphery of fixed part is provided with annular buckle, the buckle covers a part of first bearing, the apron covers the buckle, the terminal surface of axial one side of apron does not expose in the terminal surface of axial one side of fixed part.

In one or more of the embodiments described herein,

the cover plate is in a bent shape when viewed from the radial direction, and comprises a first part close to the output part, a second part which is close to the fixing part and is far away from the first bearing than the first part, and a connecting part for connecting the first part and the second part.

In one or more of the embodiments described herein,

the cover plate is fixed on the fixing part, and a gap is reserved between the end part, close to the output part, of the cover plate and the output part.

In one or more of the embodiments described herein,

the first bearing is a ball bearing.

In one or more of the embodiments described herein,

the transmission mechanism comprises:

a planetary gear meshed with the output portion;

a drive pin located radially inward of the planetary gear; and

and a plurality of needle rollers arranged between the planetary gear and the transmission pin.

In one or more of the embodiments described herein,

the speed reducer is a planetary speed reducer.

According to an embodiment of the second aspect of the present utility model, there is provided a driving device including:

the speed reducer according to the embodiment of the first aspect; and

a motor having an output shaft,

the transmission mechanism is positioned on one axial side of the output shaft, and the planetary gear of the transmission mechanism is meshed with the output shaft.

One of the beneficial effects of the embodiment of the utility model is that: the cover plate covers the bearing arranged between the output part and the fixed part, thereby preventing foreign matters from invading the first bearing and avoiding affecting the performance of the speed reducer.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. The embodiments of the utility model include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the utility model may be combined with elements and features shown in one or more other drawings or implementations. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts as used in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:

FIG. 1 is a schematic diagram of a speed reducer according to an embodiment of the first aspect of the present utility model;

FIG. 2 is another schematic diagram of a speed reducer according to an embodiment of the first aspect of the utility model;

FIG. 3 is yet another schematic illustration of a speed reducer according to an embodiment of the first aspect of the utility model;

fig. 4 is a schematic view of a driving apparatus according to an embodiment of the second aspect of the present utility model.

Detailed Description

The foregoing and other features of embodiments of the utility model will be apparent from the following description, taken in conjunction with the accompanying drawings. In the following description and drawings, particular implementations of embodiments of the utility model are disclosed in detail, which demonstrate some of the implementations in which the principles of embodiments of the utility model may be employed, it being understood that the embodiments of the utility model are not limited to the described implementations, but, on the contrary, the embodiments of the utility model include all modifications, variations, and equivalents falling within the scope of the appended claims.

In embodiments of the present utility model, the term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises," "comprising," "including," "having," and the like, are intended to reference the presence of stated features, elements, components, or groups of components, but do not preclude the presence or addition of one or more other features, elements, components, or groups of components.

In embodiments of the utility model, the singular forms "a," an, "and" the "may include plural forms and should be construed broadly as" one "or" one type "and not as limited to the meaning of" one; furthermore, the term "comprising" is to be interpreted as including both the singular and the plural, unless the context clearly dictates otherwise. Furthermore, the term "according to" should be understood as "at least partially according to … …", and the term "based on" should be understood as "based at least partially on … …", unless the context clearly indicates otherwise.

In the embodiment of the present utility model, the central axis OO' of the motor or the direction parallel thereto is referred to as the "axial direction", the radial direction centered on the axis is referred to as the "radial direction", and the direction around the axis is referred to as the "circumferential direction" for convenience of description, but this is merely for convenience of description and does not limit the orientations of the speed reducer and the driving device at the time of use and manufacture.

Various implementations of embodiments of the present utility model are described below with reference to the accompanying drawings. These implementations are merely illustrative and not limiting of the embodiments of the present utility model.

Example of the first aspect

An embodiment of a first aspect of the present utility model provides a speed reducer.

Fig. 1 is a schematic view of a speed reducer according to an embodiment of the first aspect of the present utility model, showing a case where the speed reducer is cut off in the axial direction OO'.

As shown in fig. 1, the speed reducer 100 includes a transmission mechanism 101, an output portion 102, a fixing portion 103, a first bearing 104, and a cover plate 105.

In the embodiment of the present utility model, as shown in fig. 1, the output portion 102 is located radially outside the transmission mechanism 101 and is engaged with the transmission mechanism 101, at least a part of the fixing portion 103 is located radially inside the output portion 102, the first bearing 104 is disposed between the output portion 102 and the fixing portion 103, and the cover 105 covers the first bearing 104.

As is apparent from the above embodiments, by providing the cover plate to cover the bearing provided between the output portion and the fixed portion, it is possible to prevent foreign matter from entering the first bearing and to avoid affecting the performance of the speed reducer.

In one or more embodiments, the speed reducer 100 may be a planetary speed reducer, but the present utility model is not limited thereto, and the speed reducer may be of other types, and the present utility model is not limited thereto. The bearing exposed to the external environment is arranged between the output part and the fixed part of the speed reducer, and the bearing is within the scope of the description of the utility model.

In the embodiment of the present utility model, the transmission mechanism is used to transmit the power of an external driving source (such as a motor, etc.) to the output portion of the speed reducer, and in addition, the transmission mechanism may be a multi-stage transmission mechanism, which is not limited in this aspect of the present utility model.

In the embodiment of the present utility model, at least a portion of the fixing portion 103 is located radially inward of the output portion 102, it should be understood that the fixing portion 103 has a portion located radially inward of the output portion 102, and the first bearing 104 may be disposed between the portion of the fixing portion 103 located radially inward of the output portion 102 and the output portion 102. In addition, the fixing portion 103 may further include a portion other than the radially inner side of the output portion 102, such as a fixing flange portion 1024 of the fixing portion 103, to which the present utility model is not limited.

As shown in fig. 1, in one or more embodiments, the transmission mechanism 101 includes a planetary gear 1011, a transmission pin 1012, and a plurality of needle rollers 1013, the planetary gear 1011 is engaged with the output portion 102, the transmission pin 1012 is located radially inward of the planetary gear 1011, and the plurality of needle rollers 1013 are disposed between the planetary gear 1011 and the transmission pin 1012.

Accordingly, only the loose needle rollers 1013 can be provided between the planetary gear 1011 and the drive pin 1012 to realize bearing support, and compared with the conventional structure in which the needle roller holder and the needle rollers are required to be provided between the planetary gear 1011 and the drive pin 1012 as bearings, the strength can be improved and the cost can be reduced by eliminating the needle roller holder in the embodiment of the utility model. In addition, a needle bearing with a needle retainer may be provided between the planetary gear 1011 and the drive pin 1012 to achieve bearing support, which is not limited in the present utility model.

In one or more embodiments, as shown in fig. 1, the first bearing 104 is a ball bearing, and for the ball bearing, description thereof may be omitted herein with reference to the related art. However, the present utility model is not limited thereto, and the first bearing may be other bearings, which the present utility model is not limited to. The first bearing will be exemplified as a ball bearing.

As shown in fig. 1, in one or more embodiments, the cover plate 105 is fixed to the output portion 102, an end 105a of the cover plate 105 near the fixing portion 103 has a gap g with the fixing portion 103, and a space between the cover plate 105 and the fixing portion 103, the first bearing 104 forms a labyrinth configuration.

Thus, by having the gap g, the cover plate 105 does not interfere with the fixing portion 103 when rotating together with the output portion 102, and by forming a labyrinth structure, foreign matter is more difficult to enter the first bearing 104, and the performance of the speed reducer is prevented from being affected.

In the embodiment of the present utility model, the specific shape of the labyrinth structure is not limited, and for example, as shown in fig. 1, the labyrinth structure may include an axially extending gap g between the end 105a of the cover plate 105 and the fixing portion 103 and a radially extending gap between the cover plate 105 and the first bearing 104. However, the present utility model is not limited thereto, and for example, the end 105a of the cover plate 105 may include a portion that axially covers the fixing portion 103, and thus, the labyrinth structure may further include a gap that extends in the radial direction between the end 105a of the cover plate 105 and the axial-side (O-side) end face of the fixing portion 103, whereby foreign matter can be further prevented from entering the first bearing 104.

In the embodiment of the present utility model, fig. 1 shows the cover plate 105 fixed to the output part 102, but the present utility model is not limited thereto, and the cover plate may be fixed to the fixed part, in which case there is a gap between the end of the cover plate near the output part and the output part.

However, the present utility model is not limited thereto and may be set according to actual needs. The following description of the present utility model will take the case where the cover plate 105 is fixed to the output unit 102 as an example.

As shown in fig. 1, in one or more embodiments, the cover 105 is fixed to an end portion on one axial side (O side) of the output portion 102 by a bolt 106 penetrating the cover 105, and an end surface 106S on one axial side (O side) of the bolt 106 is not exposed to an end surface 103S on one axial side (O side) of the fixing portion 103, in other words, the end surface 106S is located closer to the axial O' side than the end surface 103S.

Thus, even if the cover plate 105 is fixed by the bolts 106, the axial dimension of the speed reducer is not increased, which is advantageous for downsizing the speed reducer.

However, the present utility model is not limited thereto, and the cover plate may be fixed to the output portion by other fixing means, for example, by snap-fastening or adhesive fastening.

As shown in fig. 1, in one or more embodiments, the radial outer periphery of the fixing portion 103 is provided with an annular snap ring 107, the snap ring 107 covers a part of the first bearing 104 (in the axial direction), the cover plate 105 covers the snap ring 107 (in the axial direction), and the end face 105S of one axial side of the cover plate 105 is not exposed to the end face 103S of one axial side of the fixing portion 103, in other words, the end face 105S is located closer to the axial O' side than the end face 103S.

Thus, as shown in fig. 1, the labyrinth configuration may include an axially extending gap g between the end 105a of the cover plate 105 and the fixed portion 103, a radially extending gap between the end 105a of the cover plate 105 and the retaining ring 107, and a radially extending gap between the cover plate 105 and the first bearing 104. Thereby, the complexity of the labyrinth structure can be increased, and foreign matter can be further prevented from entering the first bearing 104.

As shown in fig. 1 to 3, in one or more embodiments, the cover 105 may be in a ring shape, the cover 105 is fixed to the output portion 102, a gap is provided between the cover 105 and the fixing portion 103, the cover 105 is in a bent shape when viewed in a radial direction, and the cover 105 includes a first portion 1051 adjacent to the output portion 102, a second portion 1052 adjacent to the fixing portion 103 and further from the first bearing 104 than the first portion 1051, and a connection portion 1053 connecting the first portion 1051 and the second portion 1052. In this way, when the cover plate 105 effectively covers the first bearing 104, the end surface 106S on one axial side (O side) of the bolt 106 is not exposed to the end surface 105S on one axial side (O side) of the cover plate 105, in other words, the end surface 106S is located closer to the axial O' side than the end surface 105S.

Thus, even if the cover plate 105 is fixed by the bolts 106, the axial dimension of the speed reducer is not increased, which is advantageous for downsizing the speed reducer.

However, the present utility model is not limited thereto, and the cover plate 105 may have other shapes, such as a straight plate shape or a corrugated shape, for example, when viewed in the radial direction shown in fig. 1, and the present utility model is not limited thereto.

Fig. 2 is another schematic view of the speed reducer of the embodiment of the first aspect of the utility model, showing the speed reducer 100 as viewed from the O-side in the axial direction; fig. 3 is a further schematic view of the speed reducer of the embodiment of the first aspect of the utility model, showing a schematic perspective view of the speed reducer 100 from the side.

It should be noted that fig. 1 to 3 above only schematically illustrate the speed reducer according to the embodiment of the present utility model, but the present utility model is not limited thereto, and the specific contents of each structure or component may refer to the related art, for example, the output portion 102 may include a ring gear 1021 directly engaged with the transmission mechanism 101 and a portion 1022 disposed opposite to the fixing portion 103 in the radial direction, and the portion 1022 and the ring gear 1021 may be fixed by bolts 1023; it is also possible to add structures or components not shown in fig. 1 to 3 or to reduce one or more structures or components in fig. 1 to 3. Reference may be made to the related art for parts or elements not specifically indicated in fig. 1 to 3, and the present utility model is not limited thereto.

As is apparent from the above embodiments, by providing the cover plate to cover the bearing provided between the output portion and the fixed portion, it is possible to prevent foreign matter from entering the first bearing and to avoid affecting the performance of the speed reducer.

Embodiments of the second aspect

Embodiments of the second aspect of the present utility model provide a driving apparatus.

Fig. 4 is a schematic diagram of a driving device 200 according to an embodiment of the second aspect of the present utility model.

As shown in fig. 4, the driving apparatus 200 includes the speed reducer 100 and the motor 201 as described in the embodiment of the first aspect, and as to the speed reducer 100, reference is made to the description in the embodiment of the first aspect, and the contents thereof are not repeated here.

As shown in fig. 4, the motor 201 has an output shaft 2011, the transmission mechanism 101 is located on one axial side (O side) of the output shaft 2011, and the planetary gears 1011 of the transmission mechanism 101 are meshed with the output shaft 2011. Thus, the output of the motor 201 can be reduced as necessary by the reduction gear 100. The speed reducer may include an input shaft having a sun gear, and the output shaft of the motor may be fixed to the input shaft of the speed reducer, and the sun gear of the input shaft may be engaged with the planetary gear of the transmission mechanism, whereby the output of the motor may be reduced as needed by the speed reducer.

A needle bearing with a needle retainer may also be provided between the planetary gear 1011 and the drive pin 1012 for bearing support, as the utility model is not limited in this regard.

As is apparent from the above embodiments, in the drive apparatus 200 including the speed reducer 100, by providing the cover plate to cover the bearing provided between the output portion and the fixed portion, it is possible to prevent foreign matter from entering the first bearing, and to avoid affecting the performance of the speed reducer and the drive apparatus.

In the embodiment of the present utility model, the driving apparatus 200 may be applied to various fields, and the present utility model is not limited thereto.

It should be noted that fig. 4 above only schematically illustrates the driving device according to the embodiment of the present utility model, but the present utility model is not limited thereto, and the specific details of each structure or component may refer to the related art, for example, the bearing 202 may be disposed between the motor 201 and the speed reducer 100; it is also possible to add structures or components not shown in fig. 4 or to reduce one or more structures or components in fig. 4. Reference may be made to the related art for components or elements not specifically indicated in fig. 4, and the present utility model is not limited thereto.

While the embodiments of the present utility model have been described in connection with specific embodiments, it should be understood by those skilled in the art that the descriptions are illustrative and are not intended to limit the scope of the embodiments of the present utility model. Various modifications and alterations of this embodiment will occur to those skilled in the art in light of the spirit and principles of this embodiment, and are to be seen as within the scope of this embodiment.

The preferred implementation of the embodiments of the present utility model has been described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the implementation of the embodiments of the utility model to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.

Claims (10)

1. A speed reducer, characterized in that the speed reducer comprises:

a transmission mechanism;

an output portion located radially outward of the transmission mechanism and engaged with the transmission mechanism;

a fixed portion, at least a portion of which is located radially inward of the output portion;

a first bearing provided between the output portion and the fixed portion; and

and a cover plate covering the first bearing.

2. The speed reducer according to claim 1, wherein,

the cover plate is fixed to the output portion, a gap is formed between the end portion, close to the fixing portion, of the cover plate and the fixing portion, and a labyrinth structure is formed by the cover plate, the fixing portion and the space between the cover plate and the first bearing.

3. The speed reducer according to claim 2, wherein,

the cover plate is fixed to an end portion of the output portion on one axial side by penetrating the cover plate with a bolt, and an end surface of the bolt on one axial side is not exposed to an end surface of the fixing portion on one axial side.

4. The speed reducer according to claim 3, wherein,

the radial periphery of fixed part is provided with annular buckle, the buckle covers a part of first bearing, the apron covers the buckle, the terminal surface of axial one side of apron does not expose in the terminal surface of axial one side of fixed part.

5. The speed reducer according to claim 4, wherein,

the cover plate is in a bent shape when viewed from the radial direction, and comprises a first part close to the output part, a second part which is close to the fixing part and is far away from the first bearing than the first part, and a connecting part for connecting the first part and the second part.

6. The speed reducer according to claim 1, wherein,

the cover plate is fixed on the fixing part, and a gap is reserved between the end part, close to the output part, of the cover plate and the output part.

7. The speed reducer according to claim 1, wherein,

the first bearing is a ball bearing.

8. The speed reducer according to claim 1, wherein,

the transmission mechanism comprises:

a planetary gear meshed with the output portion;

a drive pin located radially inward of the planetary gear; and

and a plurality of needle rollers arranged between the planetary gear and the transmission pin.

9. The speed reducer according to any one of claims 1 to 8,

the speed reducer is a planetary speed reducer.

10. A driving device, characterized in that the driving device comprises:

the speed reducer according to any one of claims 1 to 9; and

a motor having an output shaft,

the transmission mechanism is positioned on one axial side of the output shaft, and the planetary gear of the transmission mechanism is meshed with the output shaft.