CN215890974U - Speed reducer - Google Patents
Speed reducer Download PDFInfo
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- CN215890974U CN215890974U CN202120660459.XU CN202120660459U CN215890974U CN 215890974 U CN215890974 U CN 215890974U CN 202120660459 U CN202120660459 U CN 202120660459U CN 215890974 U CN215890974 U CN 215890974U
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- ball bearing
- angular contact
- contact ball
- output
- axial direction
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 20
- 230000009467 reduction Effects 0.000 description 9
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004075 alteration Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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Abstract
An embodiment of the present invention provides a speed reducer, including: input shaft, with the planetary gear of input shaft meshing, with output member and the casing that the planetary gear is connected, the speed reducer still includes: an angular contact ball bearing that supports the output member; and an adjustable cover plate that applies an adjustable force to the angular contact ball bearing in an axial direction. By the embodiment of the utility model, the rotation of the output component can be stabilized, and higher output precision can be obtained.
Description
Technical Field
The utility model relates to the field of electromechanics, in particular to a speed reducer.
Background
Reduction gears are widely used, and generally include an input portion, a transmission mechanism, an output portion, and a housing, and a bearing member is generally used to support each component, such as the output portion. In some prior art structures, a deep groove ball bearing is used to support an output flange as an output portion, and the deep groove ball bearing is fixed by a cover plate.
However, in such a configuration, since the play of the deep groove ball bearing is large, the run-out when the output flange rotates is large, and it is not possible to satisfy the requirement for high-precision traveling, particularly, for operations such as a laser cutting machine that requires high-precision work.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the utility model.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above problems, the present invention provides a speed reducer capable of stabilizing rotation of an output member and obtaining high output accuracy.
According to an embodiment of a first aspect of the present invention, there is provided a speed reducer including an input shaft, a planetary gear meshing with the input shaft, an output member connected to the planetary gear, and a casing, the speed reducer further including:
an angular contact ball bearing that supports the output member; and
an adjustable cover plate that applies an adjustable force to the angular contact ball bearing in an axial direction.
In one or more embodiments, the angular contact ball bearings include a first angular contact ball bearing and a second angular contact ball bearing that are arranged in an axial direction.
In one or more embodiments, the adjustable cover plate includes a bolt portion having an external thread and an abutment portion extending from an outer periphery of the bolt portion toward a radially outer side,
the output member has an internal thread extending in the axial direction connected to the bolt portion,
the abutting portion abuts against the second angular contact ball bearing in the axial direction.
In one or more embodiments, the output member has a stop,
the first angular contact ball bearing is axially abutted against the stopper at a position axially distant from the second angular contact ball bearing.
In one or more embodiments, the first angular contact ball bearing and the second angular contact ball bearing are respectively located at both axial ends of the planetary gear in the axial direction.
In one or more embodiments, the output member includes a planetary carrier connected to the planetary gear and an output flange provided at one axial end of the planetary carrier, and the angular contact ball bearing is provided between the output flange and the casing.
In one or more embodiments, the output member includes a planetary carrier connected to the planetary gear and an output flange provided at one axial end of the planetary carrier, and the angular contact ball bearing is provided between the planetary carrier and the casing.
In one or more embodiments, the outer circumference of the case is provided with a fixing portion.
The utility model has the beneficial effects that: the angular contact ball bearing with small play is arranged between the machine shell and the output component, and the adjustable acting force is applied to the angular contact ball bearing in the axial direction through the adjustable cover plate, so that the rotation of the output component is stable, and high output precision is obtained.
Specific embodiments of the present invention are disclosed in detail 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 so limited in scope. The embodiments of the utility model include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Drawings
The accompanying drawings, which are included to provide a further understanding of the 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 obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a sectional view of a reduction gear unit according to an embodiment of the present invention.
Detailed Description
The foregoing and other features of the utility model will become apparent from the following description taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the utility model have been disclosed in detail as being indicative of some of the embodiments in which the principles of the utility model may be employed, it being understood that the utility model is not limited to the embodiments described, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.
In the embodiments of the present invention, the terms "first", "second", and the like are used for distinguishing different elements by name, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or", "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.
In embodiments of the utility model, the singular forms "a", "an", and the like may include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, 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 dictates otherwise.
In the following description of the present invention, for the sake of convenience of description, a direction parallel to a direction extending along a shaft (for example, the central axis OO' of the input shaft) is referred to as an "axial direction", a radial direction centering on the shaft is referred to as a "radial direction", and a direction surrounding the shaft is referred to as a "circumferential direction". However, it should be noted that these are for convenience of description only, and do not limit the direction of the reducer when it is used and manufactured.
Embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 is a cross-sectional view of the reduction gear according to the embodiment of the present invention, and shows a structure in which the reduction gear 10 is cut along a central axis OO' of the reduction gear 10.
As shown in fig. 1, the reduction gear 10 includes an input shaft 11, a planetary gear 12 meshing with the input shaft 11, an output member 13 connected to the planetary gear 12, and a housing 14.
In the embodiment of the present invention, as shown in fig. 1, the speed reducer 10 further includes an angular contact ball bearing 15 and an adjustable cover plate 16, the angular contact ball bearing 15 supports the output member 13, and the adjustable cover plate 16 applies an adjustable acting force to the angular contact ball bearing 15 in the axial direction.
As can be seen from the above-described embodiments, in the present invention, the angular ball bearing 15 having a small play is provided between the housing 14 and the output member 13, and the adjustable biasing force is applied to the angular ball bearing 15 in the axial direction by the adjustable cover plate 16, so that the output member 13 rotates more stably and the output accuracy is higher than the structure using the deep groove ball bearing.
In the embodiment of the present invention, the contact angle a of the angular ball bearing 15 is determined according to actual requirements, for example, 15 degrees, 30 degrees, 45 degrees, 60 degrees, or 75 degrees, and the present invention is not limited thereto.
In the embodiment of the present invention, the contact angle a is an included angle between a connection line p1 (or p2) of the contact points between the steel balls of the angular ball bearing 15 and the inner and outer rings of the angular ball bearing 15 and the central axis OO'. Further, with regard to the specific structure of the angular ball bearing 15, reference may be made to the related art.
As shown in fig. 1, in one or more embodiments, the angular ball bearings 15 include a first angular ball bearing 15a and a second angular ball bearing 15b that are arranged in the axial direction. This enables more stable support of the output member. However, the present application is not limited to this, and for example, the number of the angular ball bearings 15 may be set according to actual needs, and for example, the number thereof is 1, 3, or more than 3. Further, the plurality of angular ball bearings 15 may be completely overlapped or partially overlapped or not overlapped in the axial direction as viewed in the axial direction.
As shown in fig. 1, in one or more embodiments, the adjustable cover plate 16 includes a bolt portion 161 having an external thread 1611 and an abutment portion 162 extending radially outward from an outer periphery of the bolt portion 161, the output member 13 has an internal thread 131 extending in the axial direction connected to the bolt portion 161, and the abutment portion 162 abuts against the second angular ball bearing 15b in the axial direction, for example, the abutment portion 162 may abut against an inner ring of the second angular ball bearing 15b in the axial direction. Accordingly, the axial position of the adjustable cover plate 16 with respect to the output member 13 can be adjusted by screwing the bolt portion 161 and the female screw 131, and the axial force of the angular ball bearing 15 can be adjusted.
In the embodiment of the present application, as shown in fig. 1, one or more adjusting portions 163 may be formed in the circumferential direction of the adjustable cover plate 16, and before the components of the speed reducer 10 are assembled, the adjusting portions 163 may adjust the relative positions of the bolt portion 161 and the internal thread 131 in the axial direction, so as to adjust the supporting force of the angular contact ball bearing 15 on the output component 13, so that the supporting force is adjusted to a predetermined preload, thereby realizing preload adjustment of the support of the bearing.
As shown in fig. 1, in one or more embodiments, the output member 13 has a stopper portion 132, and the first angular contact ball bearing 15a axially abuts against the stopper portion 132 at a position away from the second angular contact ball bearing 15 b. Thus, when the stopper portion 132 abuts against the first angular contact ball bearing 15a, and the axial position of the adjustable cover 16 relative to the output member 13 is adjusted by the adjustable cover 16, the output member 13 adjusts the axial pressing force of the stopper portion 132 relative to the first angular contact ball bearing 15a by the abutment of the stopper portion 132 and the first angular contact ball bearing 15a, thereby achieving accurate abutment and stable output of the output member 13.
As shown in fig. 1, in one or more embodiments, the first angular ball bearing 15a and the second angular ball bearing 15b are respectively located at both axial ends of the planetary gear 12 in the axial direction. This enables more stable support of the output member.
As shown in fig. 1, in one or more embodiments, the output member 13 includes a planetary carrier 133 connected to the planetary gears 12 and an output flange 134 provided at one axial end (O end) of the planetary carrier 133, and the angular ball bearing 15 (first angular ball bearing 15a) is provided between the output flange 134 and the casing 14. Thus, the output flange 134 is supported by the angular ball bearing 15, and the rotation of the output flange 134 is stabilized, thereby improving the output accuracy. However, the present application is not limited thereto, and the angular ball bearing 15 may be provided in other positions to support the output member 13, for example, the angular ball bearing 15 (second angular ball bearing 15b) may be provided between the planetary carrier 133 and the casing 14.
As shown in fig. 1, in one or more embodiments, the outer circumference of the housing 14 is provided with a fixing portion 141. Thus, the fixing portion 141 enables the reduction gear 10 to be attached and fixed to other components, which may be various components to which the reduction gear 10 is attached and fixed.
According to the above embodiment of the present invention, the angular ball bearing 15 with a small play is provided between the housing 14 and the output member 13, and the adjustable force is applied to the angular ball bearing 15 in the axial direction by the adjustable cover plate 16, so that the output member 13 rotates more stably and the output precision is higher compared to the structure using the deep groove ball bearing.
The speed reducer according to the embodiment of the present invention is described above in terms of different embodiments, and the above embodiments may be arbitrarily combined, and the description thereof is omitted here. In addition, the present invention has been described above only by way of example, but the present invention is not limited to this, and may be modified as appropriate based on the above embodiments, and the reduction gear may include other configurations, and the related art may be referred to, and the description of which is omitted here.
While the utility model has been described with reference to specific embodiments, it will be apparent to those skilled in the art that these descriptions are illustrative and not intended to limit the scope of the utility model. Various modifications and alterations of this invention will become apparent to those skilled in the art based upon the spirit and principles of this invention, and such modifications and alterations are also within the scope of this invention.
The preferred embodiments of the present invention have 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 that 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 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 (8)
1. A speed reducer comprising an input shaft, a planetary gear that meshes with the input shaft, an output member that is connected to the planetary gear, and a casing, characterized by further comprising:
an angular contact ball bearing that supports the output member; and
an adjustable cover plate that applies an adjustable force to the angular contact ball bearing in an axial direction.
2. The reducer according to claim 1,
the angular contact ball bearings include a first angular contact ball bearing and a second angular contact ball bearing that are arranged in an axial direction.
3. The reducer according to claim 2,
the adjustable cover plate includes a bolt portion having an external thread and an abutting portion extending from an outer periphery of the bolt portion toward a radially outer side,
the output member has an internal thread extending in the axial direction connected to the bolt portion,
the abutting portion abuts against the second angular contact ball bearing in the axial direction.
4. The reducer according to claim 3,
the output member is provided with a stopping part,
the first angular contact ball bearing is axially abutted against the stopper at a position axially distant from the second angular contact ball bearing.
5. The reducer according to claim 2,
the first angular contact ball bearing and the second angular contact ball bearing are respectively positioned at two axial ends of the planetary gear in the axial direction.
6. The reducer according to claim 1,
the output component comprises a planetary retainer connected with the planetary gear and an output flange arranged at one axial end of the planetary retainer, and the angular contact ball bearing is arranged between the output flange and the machine shell.
7. The reducer according to claim 1,
the output component comprises a planetary retainer connected with the planetary gear and an output flange arranged at one axial end of the planetary retainer, and the angular contact ball bearing is arranged between the planetary retainer and the machine shell.
8. The reducer according to claim 1,
the periphery of the shell is provided with a fixing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120660459.XU CN215890974U (en) | 2021-03-31 | 2021-03-31 | Speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120660459.XU CN215890974U (en) | 2021-03-31 | 2021-03-31 | Speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890974U true CN215890974U (en) | 2022-02-22 |
Family
ID=80340109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120660459.XU Active CN215890974U (en) | 2021-03-31 | 2021-03-31 | Speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890974U (en) |
-
2021
- 2021-03-31 CN CN202120660459.XU patent/CN215890974U/en active Active
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