CN211975823U

CN211975823U - Driving device and electric product

Info

Publication number: CN211975823U
Application number: CN202020144724.4U
Authority: CN
Inventors: 张铁城; 韩振旻; 张学超
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-11-20
Anticipated expiration: 2030-01-22

Abstract

An embodiment of the utility model provides a drive arrangement and electric product, drive arrangement has: a gear set having a plurality of gears; a motor driving rotation of the gear set; the motor has a shaft with teeth at one end capable of driving the gears of the gear set to rotate; and a housing having a main body portion and a wall portion extending in an axial direction from an edge of the main body portion, the housing accommodating the gear set and an end portion of the shaft, wherein the housing further has a partition wall surrounding the end portion of the shaft and the gear set, the partition wall extending in the axial direction from the main body portion and being located between the wall portion and the gear set.

Description

Driving device and electric product

Technical Field

The utility model relates to an electromechanical field.

Background

In the design of an internal gear of an existing gear box, the gear is generally placed on a shaft inside a machine shell to be fixed, and the gear is isolated from the outside only by the machine shell. In addition, when the driving force is provided by the rotation of the motor-driven gear, it is generally necessary to coat the gear with lubricating oil, to reduce the wear between the teeth of the gear, to thereby extend the life of the gear, and to reduce the noise generated by the meshing of the gears.

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 is set forth for facilitating understanding of those skilled in the art. These 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 present invention.

SUMMERY OF THE UTILITY MODEL

The inventor finds that the gear of the gear box is only protected by a shell at the periphery, so that meshing sound of the gear is easily transmitted to the external environment, and the noise is relatively large. When the gear rotates at a high speed, lubricating oil on the gear is thrown away from the gear due to centrifugal force, the thrown lubricating oil is attached to the inner wall of a shell of a gear box for accommodating the gear, and the lubricating oil attached to the inner wall of the shell is difficult to recover to the gear due to the large distance between the shell and the gear, so that the lubricating oil on the gear is less and less, the gear is easy to wear, the service life of the gear is shortened, and noise is increased due to the wear of the gear.

In order to solve at least one of the above problems or other similar problems, embodiments of the present invention provide a driving device and an electric product.

According to a first aspect of embodiments of the present invention, there is provided a driving device, the driving device having: a gear set having a plurality of gears; a motor driving rotation of the gear set; the motor has a shaft with teeth at one end capable of driving the gears of the gear set to rotate; and a housing having a main body portion and a wall portion extending in an axial direction from an edge of the main body portion, the housing accommodating the gear set and an end portion of the shaft, wherein the housing further has a partition wall surrounding the end portion of the shaft and the gear set, the partition wall extending in the axial direction from the main body portion and being located between the wall portion and the gear set.

In at least one embodiment, the distance between the inside surface of the dividing wall and the radially outer end face of the plurality of gear teeth is uniform.

In at least one embodiment, the distance between the inside surface of the partition wall and the radially outer end surfaces of the teeth of the plurality of gears is a predetermined value or is maintained within a predetermined range, the predetermined value or predetermined range being predetermined based at least on the rated rotational speed and/or the amount of lubricating oil of the gear set.

In at least one embodiment, the partition wall is formed by connecting a plurality of circular arc-shaped curved surfaces, wherein the circular arc-shaped curved surfaces correspond to the gears one by one, and the center of each circular arc-shaped curved surface coincides with the center of the corresponding gear.

In at least one embodiment, the axial dimension of the dividing wall is less than or equal to the maximum axial dimension of the gear set received by the wall portion.

In at least one embodiment, the housing comprises a first housing and a second housing which are separated, and the separation wall is positioned on the first housing which is provided with the gear set or the second housing which is not provided with the gear set.

In at least one embodiment, first fixing portions are formed at edges of wall portions of the first and second cases, respectively, and the first and second cases are fixed by engaging the first fixing portions of the first and second cases.

In at least one embodiment, second fixing portions are formed outside wall portions of the first case and the second case, respectively, and the first case and the second case are fixed by attaching the second fixing portion of the first case and the second fixing portion of the second case.

In at least one embodiment, the first casing and the second casing further have positioning portions, respectively, and the positioning portions on the first casing or the second casing on which the partition wall is formed are disposed outside the partition wall.

According to a second aspect of the embodiments of the present invention, there is provided an electric product having the driving device according to any one of the embodiments.

The embodiment of the utility model provides an one of the beneficial effect lies in: set up the division wall in the position nearer apart from the gear, be favorable to the lubricating oil on the gear to get back to the gear again on, the life of extension gear to, the double separation through division wall and casing can effectively the noise reduction.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the scope of the terms 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.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

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

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, 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 drive device according to an embodiment of the present invention.

Fig. 2 is a schematic view of a first housing side of a drive device according to an embodiment of the present invention.

Fig. 3 is a schematic view of a second housing according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the determination of the predetermined value or the predetermined range according to the amount W of the lubricating oil according to the embodiment of the present invention.

Detailed Description

The foregoing and other features of the invention will become apparent from the following description taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the embodiments in which the principles of the invention may be employed, it being understood that the invention 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. Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not intended to limit the present invention.

In the embodiments of the present invention, the terms "first", "second", "upper", "lower", and the like are used for distinguishing between different elements by reference, but do not denote any order, such as spatial arrangement, temporal order, or the like, of the elements, and the elements should not be limited by these terms. The term "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 the embodiments of the present invention, the singular forms "a", "an", and the like include the plural forms and should be interpreted 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 embodiments of the present invention, for the sake of convenience of description, a radial direction around the central axis of the rotating shaft of the motor or the axis of the rotating shaft of the gear is referred to as a "radial direction", a direction around the central axis is referred to as a "circumferential direction", a direction along the central axis or a direction parallel thereto is referred to as an "axial direction", a side away from the central axis in the radial direction is referred to as a "radially outer side", and a side closer to the central axis in the radial direction is referred to as a "radially inner side".

Embodiments of the first aspect

The embodiment of the first aspect of the present invention provides a driving device, fig. 1 is a cross-sectional view of a driving device of the embodiment of the present invention, and fig. 2 is an internal schematic diagram of a casing of a driving device of the embodiment of the present invention.

In the embodiment of the present invention, as shown in fig. 1, the driving device 1 may include a gear set 100, a motor 200, and a housing 300. Where gear set 100 may include multiple gears, for example, as shown in fig. 2, gear set 100 may include

gears

1001, 1002, and 1003.

The motor 200 drives the gear set 100 to rotate, the motor 200 includes a shaft 210, one end 210a of the shaft 210 has teeth (not shown in the drawings) capable of driving the gears of the gear set 100 to rotate, and the housing 300 accommodates the gear set 100 and the end 210a of the shaft 210. In addition, the motor 200 may further include a stator, a rotor, and the like, and the specific structure of the motor 200 may refer to the related art, and the embodiment of the present invention is not limited to the specific structure of the motor 200.

As shown in fig. 2, the housing 300 includes a main body portion 310 and a wall portion 320, the wall portion 320 extending from an edge of the main body portion 310 in the axial direction S. The housing 300 further includes a partition wall 330, the partition wall 330 extending in the axial direction S from the main body portion 310, and the partition wall 330 being located between the wall portion 320 and the gear unit 100, surrounding the end portion 210a of the shaft 210 and the gear unit 100.

Therefore, the partition wall 330 is closer to the gear train 100 than the wall portion 320 of the housing 300, and the partition wall is provided at a position closer to the gear, which is advantageous for returning the lubricating oil on the gear to the gear again, and can prolong the service life of the gear train. Moreover, the double-barrier of the partition wall 330 and the wall 320 of the housing 300 can effectively reduce the noise generated by the gear rotation from escaping to the external environment of the housing 300, thereby effectively reducing the noise.

In at least one embodiment, the distance between the inside surface of the dividing wall 330 and the radially outer end faces of the plurality of gear teeth is uniform. For example, as shown in fig. 2, the distance between the partition wall 330 and the radially outward end surface of the tooth of the gear 1001 is d1, the distance between the partition wall 330 and the radially outward end surface of the tooth of the gear 1002 is d2, the distance between the partition wall 330 and the radially outward end surface of the tooth of the gear 1003 is d3, and d1 ≈ d2 ≈ d 3.

In at least one embodiment, the distance D between the inside surface of the partition wall 330 and the radially outer end faces of the teeth of the plurality of gears is a predetermined value or remains within a predetermined range. For example, the distance D is set to 2mm, or the distance D is set to a range of 1mm to 3 mm. This can further facilitate the return of the lubricating oil from the partition wall 330 to the gear.

Alternatively, the predetermined value or the predetermined range may be predetermined in accordance with the rated rotation speed V of the gear set 100, for example, or the predetermined value or the predetermined range may be predetermined in accordance with the amount W of lubricating oil, for example.

Fig. 4 is a schematic diagram in which the predetermined value or the predetermined range is determined in accordance with the amount W of lubricating oil.

For example, the following relationship is set:

W＝(A-B)×H×ρ

as shown in fig. 4, a represents a cross-sectional area of a space between an outer edge of the gear set and the partition wall in the horizontal direction in the stationary state of the gear (or represents a cross-sectional area of a space between the outer edge of the gear set and the partition wall in the stationary state of the gear on a plane perpendicular to the axial direction), B represents an increase in cross-sectional area relative to the stationary state of the gear due to the backlash of the gear and the profile tolerance of the gear when the gear rotates, H represents the total axial height of the gear set, and ρ represents the density of the lubricating oil.

Thus, for example, B can be determined from the nominal speed V, H and ρ can be predetermined from the design of the gear set and the lubricating oil, and given an optimum amount of applied lubricating oil, an appropriate cross-sectional area a can be determined from the operating conditions of the gear set 100, and thus a preferred distance D can be determined, which further facilitates the return of the lubricating oil to the gears. Thus, the life of the gear train can be extended.

In at least one embodiment, the partition wall 330 is formed by connecting a plurality of circular arc-shaped curved surfaces. For example, as shown in fig. 2, the partition wall 330 may be formed of circular arc-shaped

curved surfaces

3301, 3302, and 3303; the arc-shaped

curved surfaces

3301, 3302, 3303 correspond to the

gears

1001, 1002, 1003 one by one, respectively, and the center of the arc-shaped curved surface 3301 coincides with the center of the gear 1001, the center of the arc-shaped curved surface 3302 coincides with the center of the gear 1002, and the center of the arc-shaped curved surface 3303 coincides with the center of the gear 1003.

Therefore, the partition wall 330 uniformly surrounds the gear set 100, which can effectively inhibit the noise generated by the gear set 100 from escaping to the external environment of the housing 300, thereby effectively reducing the noise, further facilitating the return of the lubricating oil to the gears, and further enabling the distribution of the lubricating oil to be more uniform.

In addition, the gear set 100 shown in fig. 2 includes 3 gears, but the embodiment of the present invention is not limited thereto, and the gear set 100 may also include other numbers of gears, and the embodiment of the present invention does not limit the number of gears included in the gear set. In addition, the partition wall 330 shown in fig. 2 is formed by the arc-shaped

curved surfaces

3301, 3302, and 3303, but the embodiment of the present invention is not limited thereto, and for example, in the case where the gear train 100 includes another number of gears, the number of the arc-shaped curved surfaces forming the partition wall 330 may or may not correspond to the number of the gears.

In at least one embodiment, as shown in fig. 1, the axial dimension H1 of the dividing wall 330 is less than or equal to the maximum axial dimension H2 of the gear set 100 that is received by the wall portion 320. For example, the axial dimension H1 is set as close to the maximum axial dimension H2 as possible. Thus, the partition wall 330 can surround the gear train 100 as much as possible without interfering with other components, thereby further facilitating return of the lubricating oil to the gears.

In at least one embodiment, as shown in fig. 1, the housing 300 may include a first housing 3001 and a second housing 3002 that are separate bodies. As shown in fig. 2, the first housing 3001 is provided with a gear unit 100; as shown in fig. 3, the gear unit 100 is not disposed on the second housing 3002.

As shown in fig. 2, the partition wall 330 is located on the first housing 3001, but the embodiment of the present invention is not limited thereto, and the partition wall 330 may also be located on the second housing 3002. The embodiment of the present invention does not limit which housing the partition wall is located, and after the housing 300 is closed, the partition wall 330 can surround the gear train 100.

Furthermore, the embodiment of the present invention may also provide a partition wall on the first housing 3001 and the second housing 3002, and after the first housing 3001 and the second housing 3002 are closed, the partition wall on the two housings may be configured to surround the gear set 100.

In at least one embodiment, as shown in fig. 2, an edge of a wall portion of the first housing 3001 is formed with a first fixing portion 3001a, and as shown in fig. 3, an edge of a wall portion of the second housing 3002 is formed with a first fixing portion 3002a fitted with the first fixing portion 3001 a.

As shown in fig. 1, the first fixing portion 3001a of the first housing 3001 and the first fixing portion 3002a of the second housing 3002 are engaged with each other, thereby fixing the first housing 3001 and the second housing 3002. The

first fixing portions

3001a and 3002a are, for example, snap structures, or mutually fitting step structures, for example. The first housing 3001 and the second housing 3002 are fixed by a snap structure or a step structure, whereby the housings can be fixed by a simple structure, reducing the production cost.

In at least one embodiment, as shown in fig. 2, a second fixing portion 3001b may be further formed outside the wall portion of the first housing 3001, and as shown in fig. 3, a second fixing portion 3002b may be further formed outside the wall portion of the second housing 3002. The first housing 3001 and the second housing 3002 are fixed by attaching the second fixing portion 3001b of the first housing 3001 and the second fixing portion 3002b of the second housing 3002.

The

second fixing portions

3001b and 3002b are, for example, through holes, and the first housing 3001 and the second housing 3002 are fixed by attaching the

second fixing portions

3001b and 3002b with screws, for example, tapping screws. Therefore, the shell can be further reliably fixed, the gear set can also be reliably fixed through the shell, and noise caused by looseness of the gear set is avoided.

In at least one embodiment, as shown in fig. 2, the first housing 3001 may further be formed with a positioning portion 3001c, the positioning portion 3001c being disposed outside the partition wall 330; as shown in fig. 3, the second housing 3002 may be further formed with positioning portions 3002c that cooperate with the positioning portions 3001c of the first housing 3001. Positioning and fixing of the first housing 3001 and the second housing 3002 can be facilitated by fitting of the positioning portions 3001c and the positioning portions 3002 c.

For example, as shown in fig. 2, positioning portion 3001c is formed in a hole shape, and as shown in fig. 3, positioning portion 3002c is formed in a rod shape, and positioning of first housing 3001 and second housing 3002 is realized by inserting rod-shaped positioning portion 3002c into hole-shaped positioning portion 3001 c. However, the embodiment of the present invention is not limited to this, and the

positioning portions

3001c and 3002c may also be other matching structures, and the specific structure may refer to the related art, and the embodiment of the present invention is not limited to the specific structure thereof. When the partition wall 330 is positioned on the second housing 3002, the positioning portion 3002c of the second housing 3002 may be disposed outside the partition wall 330.

In addition, the housing 300 shown in fig. 1 includes 2 split housing parts (the first housing 3001 and the second housing 3002), but the embodiment of the present invention does not limit the number of the split housing parts, and the housing 300 may also be formed by other number of split housing parts, for example, the first housing 3001 and the second housing 3002 are respectively split into more sub-housings, which is not limited by the embodiment of the present invention.

According to the utility model discloses the embodiment of the first aspect sets up the division wall in the position nearer apart from the gear, is favorable to lubricating oil on the gear to get back to the gear once more, prolongs the life of gear train to, can effectively noise reduction through the dual separation of division wall and casing.

Embodiments of the second aspect

An embodiment of the second aspect of the present invention provides an electrical product. The electric product of the embodiment of the utility model comprises the driving device of the embodiment of the first aspect. Since the structure of the driving device has been described in detail in the embodiment of the first aspect, the contents thereof are incorporated herein, and the description thereof is omitted here.

In the embodiment of the second aspect of the present invention, the application field of the electrical product is not limited, and the electrical product can be applied to products such as an air conditioner, a water dispenser, a washing machine, a sweeper, a compressor, a blower, a stirrer, and the like, and can also be applied to electrical equipment in other fields.

According to the utility model discloses the embodiment of second aspect sets up the division wall in the position nearer apart from the gear, is favorable to lubricating oil on the gear to get back to the gear once more, prolongs the life of gear train to, can effectively noise reduction through the dual separation of division wall and casing.

The present invention has been described in connection with specific embodiments, but it should be clear to a person skilled in the art that these descriptions are intended to be illustrative and not limiting to the scope of the invention. Various modifications and adaptations of the present invention may occur to those skilled in the art, which are within the spirit and scope of the present invention.

Claims

1. A drive device, the drive device having:

a gear set having a plurality of gears;

a motor driving rotation of the gear set; the motor has a shaft with teeth at one end capable of driving the gears of the gear set to rotate; and

a housing having a main body portion and a wall portion extending in an axial direction from an edge of the main body portion, the housing accommodating the gear set and an end portion of the shaft,

the drive means is characterized in that the drive means is,

the housing also has a dividing wall surrounding the end of the shaft and the gear set, the dividing wall extending axially from the body portion and being located between the wall portion and the gear set.

2. The drive device according to claim 1,

the distance between the inside surface of the partition wall and the radially outside end surface of the teeth of the plurality of gears is uniform.

3. The drive device according to claim 1,

the distance between the inside surface of the partition wall and the radially outer end surface of the teeth of the plurality of gears is a predetermined value or is maintained within a predetermined range, which is predetermined at least in accordance with the rated rotational speed and/or the amount of lubricating oil of the gear set.

4. The drive device according to claim 1,

the partition wall is formed by connecting a plurality of circular arc curved surfaces,

the plurality of circular arc-shaped curved surfaces correspond to the plurality of gears one by one, and the center of each circular arc-shaped curved surface is superposed with the center of the corresponding gear.

5. The drive device according to claim 1,

the axial dimension of the dividing wall is less than or equal to the maximum axial dimension of the gear set received by the wall.

6. The drive device according to any one of claims 1 to 5,

the housing comprises a first housing and a second housing which are separated, and the separation wall is positioned on the first housing which is provided with the gear set or the second housing which is not provided with the gear set.

7. The drive device according to claim 6,

first fixing portions are formed at edges of wall portions of the first and second cases, respectively, and the first and second cases are fixed by engaging the first fixing portions of the first and second cases.

8. The drive device according to claim 6,

second fixing portions are formed on outer sides of wall portions of the first case and the second case, respectively, and the first case and the second case are fixed by attaching the second fixing portion of the first case and the second fixing portion of the second case.

9. The drive device according to claim 6,

the first casing and the second casing are respectively provided with a positioning part, and the positioning parts on the first casing or the second casing which is provided with the partition wall are arranged on the outer side of the partition wall.

10. An electrical product, characterized in that it has a drive device according to any one of claims 1 to 9.