CN217056264U

CN217056264U - Speed reducer

Info

Publication number: CN217056264U
Application number: CN202220233104.7U
Authority: CN
Inventors: 刘莹
Original assignee: Zhejiang Fennuo Transmission Technology Co ltd
Current assignee: Zhejiang Fennuo Transmission Technology Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-07-26
Anticipated expiration: 2032-01-27

Abstract

The utility model relates to a speed reducer, include: a box body; the transmission component is arranged in the box body and comprises a transmission part and an output shaft connected with the transmission part, and the transmission part can rotate relative to the box body under the driving force and drives the output shaft to rotate; the speed reducer further comprises an oil scraping assembly sleeved on the output shaft, at least part of the oil scraping assembly is in contact with the lubricant and rotates along with the output shaft, and the lubricant is conveyed to a target position under the action of centrifugal force generated by rotation of the oil scraping assembly. Due to the arrangement, when the oil scraping assembly rotates, the contaminated lubricant reaches the target position under the action of centrifugal force and gravity, so that the parts at the target position effectively improve the lubricating effect, and the service life of the speed reducer is prolonged.

Description

Speed reducer

Technical Field

The utility model relates to a speed reducer.

Background

A plurality of supporting bearings for rotation are arranged on a common output shaft in the structural design of the speed reducer adopted in the current market, and the rest supporting bearings are bearing or torque transmission type gears or gear shafts. The general internal oil-immersed lubrication is oil scraping and self-lubricating for the transmission assembly, the rotating transmission assembly is contacted with the lubricant, and a small amount of the contaminated lubricant is thrown out to the bearing under the action of the rotating centrifugal force of the transmission assembly. But because set up and have certain distance between bearing on the output shaft and the drive assembly, and the area of contact of drive assembly and emollient is limited to it is relatively poor to lead to the lubricated effect between drive assembly each other and between bearing and the output shaft, leads to lubrication abnormalities such as drive assembly and output shaft and bearing to make the speed reducer whole noise big, reduces its life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speed reducer, it can improve the lubricated effect of internals, improves its life, saves the maintenance cost.

In order to achieve the above purpose, the utility model provides a following technical scheme: a speed reducer, comprising:

a box body;

the transmission component is arranged in the box body and comprises a transmission piece and an output shaft connected with the transmission piece, and the transmission piece can rotate relative to the box body under the driving force and drives the output shaft to rotate;

the speed reducer further comprises an oil scraping assembly sleeved on the output shaft, at least part of the oil scraping assembly is in contact with the lubricant and rotates along with the output shaft, and the lubricant is conveyed to a target position under the action of centrifugal force generated by rotation of the oil scraping assembly.

Furthermore, the oil scraping assembly comprises an oil scraping piece, the oil scraping piece comprises a connecting portion sleeved on the output shaft and a protruding portion connected with the connecting portion, and at least part of the protruding portion is in contact with the lubricant.

Further, the protruding portion has a guide surface which is provided obliquely, and at least a part of the guide surface is in contact with the lubricant.

Further, the guide surface is provided obliquely in a direction opposite to a rotation direction of the oil scraping member from a side close to the target position to a side far from the target position.

Further, the guide surface includes a first end side close to the target position and a second end side far from the target position, and the lubricant is slid out to the target position along the guide surface from the first end side and/or the second end side.

Furthermore, a plurality of through holes are formed in the connecting portion, and the through holes are suitable for enabling the lubricant flowing out of the second end side to reach the target position.

Further, an oil reservoir is provided in the connecting portion, the oil reservoir being adapted to store the lubricant flowing out from the first end side;

the connecting part comprises a first end face close to the target position and a second end face connected with the first end face, and the oil storage tank is formed on the first end face.

Furthermore, the material of the oil scraping piece is oil-resistant engineering plastic.

Furthermore, the transmission part comprises a first transmission part meshed with the driving part and a second transmission part meshed with the first transmission part, and the second transmission part is sleeved on the outer side of the output shaft.

The beneficial effects of the utility model reside in that: the oil scraping assembly is arranged in the speed reducer in a sleeved mode and is arranged on the outer side of the output shaft, at least part of the oil scraping assembly is in contact with the lubricant, so that when the speed reducer is in an operating state, the transmission assembly rotates to drive the output shaft to rotate, the oil scraping assembly rotates and is in contact with the lubricant, the lubricant which is infected with the lubricant reaches a target position under the action of centrifugal force and gravity in the rotating process of the oil scraping assembly, the lubricating effect of parts of the target position is effectively improved, and the service life of the speed reducer is prolonged.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

FIG. 1 is a schematic cross-sectional view of a reducer in the prior art;

fig. 2 is a schematic sectional view of the speed reducer of the present invention;

fig. 3 is a schematic view of a part of the structure of the speed reducer of the present invention;

fig. 4 is a sectional view of a part of the structure of the speed reducer of the present invention.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this application, where the contrary is not intended, directional words such as "upper, lower, top and bottom" are generally used with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, vertical or gravitational direction; similarly, "inner and outer" refer to inner and outer relative to the profile of the components themselves for ease of understanding and description, but the above directional terms are not intended to limit the present application.

Referring to fig. 2 to 4, the reducer of the present invention is used to connect a prime mover and a working machine so that they match a rotational speed and a transmission torque. The speed reducer comprises a box body 1, a transmission assembly 2 arranged in the box body 1 and a bearing assembly arranged on one side of the transmission assembly 2. Wherein, the box body 1 is provided with a cavity 11, and the transmission component 2 is arranged in the cavity 11.

The transmission assembly 2 comprises a transmission member connected to the prime mover and an output shaft 23 connecting the transmission member to the working machine. The bearing assembly is adapted to support the output shaft 23 and reduce friction during rotation thereof, thereby improving the service life of the output shaft 23. The bearing assembly comprises two bearings 3 which are sleeved on two sides of the output shaft 23 in pairs. The two bearings 3 have the same structure, and thus, one of the bearings 3 will be described in detail in this application, and the other will not be described in detail. Taking the left bearing 3 in fig. 2 as an example, the bearing 3 includes an inner ring 31 fitted over the output shaft 23, an outer ring 32 fitted over the inner ring 31, and balls disposed between the outer ring 32 and the inner ring 31. When the speed reducer is in an operating state, the transmission piece drives the output shaft 23 to rotate, and then drives the inner ring 31 of the bearing 3 to rotate.

The transmission parts comprise a first transmission part 21 engaged with the driving part and a second transmission part 22 engaged with the first transmission part 21, and the second transmission part 22 is sleeved on the outer side of the output shaft 23. The first transmission member 21 drives the second transmission member 22 to rotate under the driving force of the prime mover, thereby driving the output shaft 23 to rotate relative to the case 1 and transmitting the rotating force to the working machine connected to the output shaft 23.

In order to reduce the friction force when the transmission assembly 2 and the bearing assembly work, the speed reducer further comprises an oil storage cavity 12 arranged in the cavity 11. The lubricant with a certain liquid level is arranged in the oil storage cavity 12. The oil reservoir chamber 12 is provided below the transmission assembly 2 in the height direction of the cavity 11, and at least a part of the transmission assembly 2 is in contact with the lubricant in the oil reservoir chamber 12. In this embodiment, at least a portion of second drive member 22 is in contact with the lubricant. When the speed reducer is in an operating state, the second transmission member 22 is in contact with the lubricant and rotates to bring the lubricant between the first transmission member 21 and the second transmission member 22, so that the friction force between the first transmission member 21 and the second transmission member 22 is reduced due to the effect of the lubricant.

Referring to fig. 1, in the prior art, since a certain distance exists between the bearing 3 and the second transmission 22 and the contact area between the second transmission 22 and the lubricant is limited, only a small amount of lubricant exists between the first transmission 21 and the second transmission 22 and between the bearing assembly and the output shaft 23, and further, the friction force generated when the transmission assembly 2, the output shaft 23, the bearing 3 and other parts operate is large, which not only causes large noise when the whole speed reducer operates, but also reduces the service life of the parts and the speed reducer. In addition, in order to improve the lubricating effect of the speed reducer, more lubricant is injected into the oil storage cavity 12, and if the contact area between the second transmission member 22 and the lubricant is increased by increasing the liquid level of the lubricant, the lubricant in the oil storage cavity 12 is excessively stirred by the second transmission member 22, so that the viscosity of the lubricant is increased, the load of the speed reducer is increased, and the energy consumption is increased.

In order to solve the above problems, in this embodiment, the speed reducer further includes an oil scraping assembly sleeved on the output shaft 23, and at least a portion of the oil scraping assembly contacts with the lubricant and rotates with the output shaft 23, so as to convey the lubricant to a target position under the action of a centrifugal force generated by rotation of the oil scraping assembly, improve the lubrication degree of parts in the speed reducer, reduce a friction agent between the parts, and further achieve the purpose of prolonging the service lives of the parts and the speed reducer. In this embodiment, the target position is between the bearing 3 on the side of the second transmission member 22 and the first transmission member 21 and the second transmission member 22.

The oil scraping assembly comprises oil scraping pieces 4 which are arranged on one sides of two bearings 3 in pairs, and the two oil scraping pieces 4 are identical in structural principle. Therefore, only one of the scraper members 4 will be described in the present application. Taking the oil scraping element 4 in fig. 2 as an example, the oil scraping element 4 comprises a connecting portion 41 sleeved on the output shaft 23 and a protruding portion 42 connected with the connecting portion 41, and at least part of the protruding portion 42 is in contact with the lubricant. Specifically, the protrusion 42 has a guide surface 421 obliquely arranged, and at least a part of the guide surface 421 is in contact with the lubricant. When the speed reducer is operated, the protrusion 42 of the oil scraping member 4 comes into contact with the lubricant to deliver the lubricant to the target position. More specifically, the guide surface 421 is provided obliquely in a direction opposite to the rotation direction of the oil scraping member 4 from the side close to the target position to the side away from the target position. In this embodiment, the rotation direction of one of the oil scraping members 4 is the direction b in fig. 3.

The guide surface 421 includes a first end side 4211 proximate to the target location and a second end side 4212 distal from the target location. The lubricant slides out along the guide surface 421 from the first end side 4211 and/or the second end side 4212 to the target position. Specifically, the connecting portion 41 is provided with a plurality of through holes 413 and an oil storage tank 411. Wherein the through bore 413 is adapted for reaching a target position for lubricant flowing out of the second end side 4212. The oil reservoir 411 is used to store lubricant flowing out from the first end side 4211.

The connecting portion 41 includes a first end surface 412 near the target position and a second end surface connected to the first end surface 412, and the oil reservoir 411 is formed on the first end surface 412. When the protrusion 42 with the lubricant moves to a in fig. 3, a part of the lubricant on the protrusion 42 flows to the second end surface along the second end side 4212 of the guide surface 421 by gravity, and flows to the first end surface 412 through the plurality of through holes 413, and the lubricant flowing to the first end surface 412 is thrown to the bearing 3 disposed on one side of the oil scraping member 4 by the centrifugal force generated by the rotation of the oil scraping member 4, so as to improve the degree of lubrication between the bearing 3 and the output shaft 23. And the other part of the lubricant on the protruding part 42 enters the oil storage groove 411 along the first end 4211 of the guide surface 421 under the action of the centrifugal force and gravity generated by the rotation of the protruding part or is directly thrown to the bearing 3 arranged on one side of the oil scraping piece 4, so that the degree of lubrication between the bearing 3 and the output shaft 23 is further improved, the service lives of the bearing 3 and the transmission piece are prolonged, and the maintenance cost is saved. In the embodiment, the oil scraping member 4 is made of oil-resistant engineering plastic, so that the oil scraping member is light in weight, can be directly mounted on the output shaft 23, and does not increase the load energy consumption of the output end of the output shaft 23.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A speed reducer, characterized by comprising:

a box body;

2. The reducer according to claim 1, wherein the oil scraping member comprises an oil scraping member, the oil scraping member comprises a connecting portion fitted over the output shaft and a protrusion connected to the connecting portion, and at least a portion of the protrusion is in contact with the lubricant.

3. The reducer according to claim 2, wherein the protrusion has a guide surface that is disposed obliquely and at least a part of which is in contact with the lubricant.

4. The reduction gear according to claim 3, wherein the guide surface is provided obliquely in a direction opposite to a rotation direction of the oil scraping member from a side close to the target position to a side far from the target position.

5. The reducer of claim 4, wherein the guide surface includes a first end side that is proximate to the target position and a second end side that is distal from the target position, the lubricant sliding along the guide surface from the first end side and/or the second end side to the target position.

6. The reduction gear according to claim 5, wherein the connecting portion has a plurality of through holes formed therein, the through holes being adapted to allow the lubricant flowing out from the second end side to reach the target position.

7. The speed reducer according to claim 5, wherein an oil reservoir is provided in the connecting portion, the oil reservoir being adapted to store the lubricant that flows out from the first end side;

8. The reducer according to claim 2, wherein the material of the oil scraping member is oil-resistant engineering plastic.

9. The reducer according to claim 2, wherein the transmission member includes a first transmission member engaged with the prime mover and a second transmission member engaged with the first transmission member, the second transmission member being fitted around the output shaft.