CN218564352U - Planetary reducer, crane and vehicle - Google Patents

Abstract

The utility model relates to a planetary reducer, a crane and a vehicle, wherein the planetary reducer comprises a reduction planetary gear set, a shell and an oil pump; the shell comprises a first cavity, a second cavity and an oil pan, wherein the first cavity and the second cavity are coaxially arranged; the reduction planetary gear set comprises an input shaft, and the input shaft penetrates through the second cavity; the oil pump comprises an oil inlet, an oil outlet, an inner rotor and an outer rotor, the inner rotor is sleeved on the input shaft and is in transmission connection with the input shaft, and outer teeth of the inner rotor are meshed with inner teeth of the outer rotor; the inner rotor is connected with the input shaft through a key, and a transmission steel ball is arranged between the shaft sleeve and the inner rotor. The oil pump and the reduction planetary gear set are coaxially arranged, extra gear driving is not needed, the structural integration degree is high, fewer parts are adopted, the cost is lower, and the reliability is high.

Description

Planetary reducer, crane and vehicle

Technical Field

The application relates to the technical field of speed reducers, in particular to a battery monomer, a battery and an electric device.

Background

The speed reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission which are enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine. The function of matching the rotation speed and transmitting the torque between the prime mover and the working machine or the actuating mechanism is very extensive in modern machinery. The speed reducer plays a role in matching rotating speed and transmitting torque between the prime mover and the working machine or the actuating mechanism, and is a relatively precise machine. Its purpose is to reduce the speed and increase the torque. It has various types, different models and different purposes. The speed reducers are various in types and can be divided into gear speed reducers, worm speed reducers and planetary gear speed reducers according to the transmission types; the speed reducer can be divided into a single-stage speed reducer and a multi-stage speed reducer according to different transmission stages; according to the shape of the gear, the gear can be divided into a cylindrical gear reducer, a conical gear reducer and a conical-cylindrical gear reducer; according to the arrangement form of transmission, the speed reducer can be divided into an expansion speed reducer, a shunt speed reducer and a coaxial speed reducer.

Because of the structural characteristics of the planetary speed reducer, a needle bearing of the planetary gear bears a large radial load, and the installation position of the needle bearing is in a relatively closed position, so that lubricating oil is difficult to lubricate the needle bearing in the operation process. The existing products have two solving methods, one is to soak the needle roller bearing in the lubricating oil to ensure that the needle roller bearing works in the lubricating oil; another conventional planetary reducer with a forced lubrication pump as shown in fig. 1 is to add an external forced lubrication pump to the output end of the whole planetary reducer 1, that is, the output shaft 2 drives the oil pump 4 to operate, so as to pump the lubricating oil from the oil pan to the needle bearings to be lubricated, thereby realizing the lubrication of the needle bearings.

Although the first scheme does not increase extra structure and cost, the whole planet row is immersed in oil, so that the running resistance is large, on one hand, the transmission efficiency is greatly reduced, and the temperature of the speed reducer is easily overhigh.

The second scheme is that the whole planet row can not be immersed in oil liquid in a forced lubrication mode, so that the problems of low transmission efficiency and heating are avoided, but the installation position of the planet row is at the output end and is driven by an independent pair of gears, and the planet row is an offset installation mode.

SUMMERY OF THE UTILITY MODEL

In view of above-mentioned problem, the application provides a planetary reducer, hoist and vehicle, solves current planetary reducer that has force lubrication and sets up the oil pump at the output and need independent a pair of gear drive and cause the lower and higher problem of pump that becomes of integration level.

To achieve the above object, the inventors provide a planetary reducer including a reduction planetary gear set, a housing, and an oil pump;

the shell comprises a first cavity, a second cavity and an oil pan, wherein the first cavity and the second cavity are coaxially arranged, the first cavity is used for placing a reduction planetary gear set, the second cavity is used for placing an oil pump, and the oil pan is used for storing lubricating oil;

the speed reduction planetary gear set comprises an input shaft, the input shaft penetrates through the second cavity, and the input shaft is in transmission connection with the driving motor;

the oil pump comprises an oil inlet, an oil outlet, an inner rotor and an outer rotor, the inner rotor is sleeved on the input shaft and is in transmission connection with the input shaft, outer teeth of the inner rotor are meshed with inner teeth of the outer rotor, the oil inlet is connected to the oil pan through an oil conveying pipe, and the oil outlet is connected to a position needing lubrication in the first cavity;

the inner rotor is connected with the input shaft through a key, and a transmission steel ball is arranged between the shaft sleeve and the inner rotor.

Further preferably, the oil pump further comprises an oil pump cover and an oil cavity cover, and the oil pump cover and the oil cavity cover are arranged on two sides of the second cavity;

the oil pump cover and the oil cavity cover are provided with through holes for the input shaft to pass through, the oil pump cover and the oil cavity cover are sleeved on the shaft sleeve, and the inner rotor and the outer rotor are arranged between the oil pump cover and the oil cavity cover;

the oil outlet is arranged on the oil pump cover;

the oil inlet is arranged on the oil cavity cover.

Further optimize, be equipped with the filter core in the oil pan, the oil inlet of oil pump is passed through defeated oil pipe and is connected in the filter core.

Further preferably, the oil pump is a gerotor gear pump.

Further preferably, the reduction planetary gear set comprises a sun gear, a planet carrier, a planet gear and a gear ring;

the sun gear, the planet carrier and the gear ring are coaxially arranged;

the sun wheel is meshed with the planet wheel, and the axis of the sun wheel is connected with the input shaft;

the planet gear is meshed with the gear ring, and the axis of the planet gear is connected with the planet carrier;

the axis of the planet carrier is connected with the output shaft;

the gear ring is fixedly arranged in the first cavity of the shell.

Further preferably, an oil outlet of the oil pump is connected with a needle bearing on the input shaft.

Still provide another technical scheme: the speed reducer of the crane is the planetary speed reducer.

Still provide another technical scheme: a speed reducer of the vehicle is the planetary speed reducer.

Different from the prior art, in the technical scheme, the shell of the speed reducer is provided with the first cavity, the second cavity and the oil pan, and lubricating oil is stored in the oil pan; the oil pump is characterized in that a speed reduction planetary gear set is arranged in a first cavity, an oil pump is arranged in a second cavity, an oil inlet of the oil pump is connected to an oil sump through an oil conveying pipe, an oil outlet of the oil pump is connected to a position needing lubrication in the first cavity, an input shaft of the speed reduction planetary gear set penetrates through the second cavity to be connected to a driving motor in a transmission mode, the input shaft of the speed reduction planetary gear set is connected to an inner rotor of the oil pump in a transmission mode, when the driving motor drives the input shaft to rotate, the input shaft is subjected to speed reduction through the speed reduction planetary gear set and then outputs through an output shaft of the speed reduction planetary gear set, the input shaft drives an inner rotor of the oil pump to rotate, the inner rotor of the oil pump is meshed with the outer rotor, the outer rotor is driven to rotate by rotation of the inner rotor, the oil pump extracts lubricating oil from the oil sump through the oil conveying pipe and enters the oil pump through the oil inlet, the lubricating oil pump is sent to the position needing lubrication in the first cavity, forced lubrication of a speed reducer is achieved, the oil pump and the oil pump is coaxially arranged with the speed reduction planetary gear set, additional gear, the oil pump is not needed to be driven, the structure is high in an integrated degree, few in structure, low cost and high in reliability.

The above description of the present invention is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clearly understood by those skilled in the art, further, the present invention can be implemented according to the contents described in the text and the drawings of the present application, and in order to make the above objects, other objects, features, and advantages of the present application more easily understood, the following description will be made in conjunction with the detailed description of the present application and the drawings.

Drawings

The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of particular embodiments of the present application, as well as others related thereto, and are not to be construed as limiting the application.

In the drawings of the specification:

FIG. 1 is a schematic diagram of a planetary reducer according to the prior art;

FIG. 2 is a schematic diagram of a planetary reducer according to an embodiment;

FIG. 3 is a schematic view of a planetary reducer according to an embodiment;

FIG. 4 is a schematic diagram of an oil pump according to an embodiment;

fig. 5 is a schematic structural diagram of a reduction planetary gear set according to an embodiment.

The reference numerals referred to in the above figures are explained below:

1. a planetary speed reducer is arranged on the front end of the main shaft,

11. the oil pan comprises a shell body 111, a first cavity body 112, a second cavity body 113 and an oil pan;

12. a reduction planetary gear set 121, a sun gear 122, a planet carrier 123, a planet gear 124 and a ring gear;

2. an input shaft;

3. an output shaft;

4. the oil pump 41, the inner rotor 42, the outer rotor 43, the oil inlet 44, the oil outlet 45, the oil delivery pipe 46, the oil pump cover 47 and the oil cavity cover;

5. a shaft sleeve;

6. steel balls;

7. and (3) a filter element.

Detailed Description

In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are merely for more clearly illustrating the technical solutions of the present application, and therefore, the embodiments are only used as examples, and the scope of the present application is not limited thereby.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.

In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, meaning that three relationships may exist, for example a and/or B, meaning: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".

In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.

As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. Furthermore, the description of embodiments herein of the present application of the term "plurality" means more than two (including two), and the analogous meaning of "plurality" is also to be understood, e.g., "plurality", etc., unless explicitly specified otherwise.

In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are for convenience of description of the specific embodiments of the present application or for ease of understanding by the reader only, and do not indicate or imply that a device or component referred to must have a specific position, a specific orientation, or be configured or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application are to be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains in accordance with specific situations.

Referring to fig. 2-4, the present embodiment provides a planetary reducer 1, which includes a reduction planetary gear set 12, a housing 11 and an oil pump 4;

the housing 11 includes a first cavity 111, a second cavity 112 and an oil pan 113, the first cavity 111 and the second cavity 112 are coaxially disposed, the first cavity 111 is used for placing the reduction planetary gear set 12, the second cavity 112 is used for placing the oil pump 4, and the oil pan 113 is used for storing lubricating oil;

the speed reduction planetary gear set 12 comprises an input shaft 2, the input shaft 2 penetrates through the second cavity 112, and the input shaft 2 is used for being in transmission connection with a driving motor;

the oil pump 4 comprises an oil inlet 43, an oil outlet 44, an inner rotor 41 and an outer rotor 42, the inner rotor 41 is sleeved on the input shaft 2, the inner rotor 41 is in transmission connection with the input shaft 2, outer teeth of the inner rotor 41 are meshed with inner teeth of the outer rotor 42, the oil inlet 43 is connected to an oil pan 113 through an oil conveying pipe 45, and the oil outlet 44 is connected to a position needing to be lubricated in the first cavity 111;

a shaft sleeve 5 is arranged between the inner rotor 41 and the input shaft 2, the shaft sleeve 5 is in transmission connection with the input shaft 2 through key connection, and a transmission steel ball 6 is arranged between the shaft sleeve 5 and the inner rotor 41. Through set up axle sleeve 5 between inner rotor 41 and input shaft 2, axle sleeve 5 realizes the transmission through linking with 2 keys of input shaft and is connected, sets up steel ball 6 between axle sleeve 5 and inner rotor 41, when input shaft 2 drives axle sleeve 5 pivoted, axle sleeve 5 drives inner rotor 41 through steel ball 6 and rotates, can slow down axle sleeve 5 through steel ball 6, avoids inner rotor 41's rotational speed too fast.

The shell 11 of the speed reducer is provided with a first cavity 111, a second cavity 112 and an oil pan 113, so that lubricating oil is stored in the oil pan 113; the speed reduction planetary gear set 12 is arranged in the first cavity 111, the oil pump 4 is arranged in the second cavity 112, an oil inlet 43 of the oil pump 4 is connected to an oil pan 113 through an oil conveying pipe 45, an oil outlet 44 of the oil pump 4 is connected to a position needing to be lubricated in the first cavity 111, an input shaft 2 of the speed reduction planetary gear set 12 penetrates through the second cavity 112 to be connected to a driving motor in a transmission mode, the input shaft 2 of the speed reduction planetary gear set 12 is connected with an inner rotor 41 of the oil pump 4 in a transmission mode, in the process that the driving motor drives the input shaft 2 to rotate, the input shaft 2 is decelerated through the speed reduction planetary gear set 12 and then outputs through an output shaft 3 of the speed reduction planetary gear set 12, the input shaft 2 drives the inner rotor 41 of the oil pump 4 to rotate, the inner rotor 41 of the oil pump 4 is meshed with the outer rotor 42, the rotation of the outer rotor 41 drives the outer rotor 42 to rotate, the oil pump 4 extracts lubricating oil from the oil pan 113 through the oil conveying pipe 45, the lubricating oil enters the oil pump 4 through the oil inlet 43, the lubricating oil is sent into the position needing to be lubricated in the first cavity 111 through the oil outlet 44 of the oil pump 4, forced lubrication of the speed reduction planetary gear set 4 is realized, the speed reduction gear set 4 and the oil pump 12 are coaxially arranged, the structure is high in the structure, the structure has low cost and the low reliability and the low cost.

Referring to fig. 3, in some embodiments, the oil pump 4 further includes an oil pump cover 46 and an oil chamber cover 47, and the oil pump cover 46 and the oil chamber cover 47 are disposed on two sides of the second cavity 112; the oil pump cover 46 and the oil cavity cover 47 are provided with through holes for the input shaft 2 to pass through, the oil pump cover 46 and the oil cavity cover 47 are sleeved on the shaft sleeve 5, and the inner rotor 41 and the outer rotor 42 are arranged between the oil pump cover 46 and the oil cavity cover 47; the oil outlet 44 is arranged on the oil pump cover 46; the oil inlet 43 is provided on an oil chamber cover 47. The oil pump 4 is provided with the oil pump cover 46 and the oil chamber cover 47, so that the sealing performance of lubricating oil in the oil pump 4 is ensured, and the lubricating oil is prevented from overflowing.

Referring to fig. 2, in some embodiments, a filter element 7 is disposed in the oil pan 113, and the oil inlet 43 of the oil pump 4 is connected to the filter element 7 through an oil delivery pipe 45. Through set up filter core 7 in oil pan 113, oil inlet 43 of oil pump 4 is connected in filter core 7 through defeated oil pipe 45, and when oil pump 4 extracted lubricating oil from oil pan 113 through defeated oil pipe 45, lubricating oil was filtered through filter core 7 earlier and is sent into oil pump 4 again, reduces the impurity in the lubricating oil, avoids the influence of impurity in the lubricating oil to the lubricated position.

In certain embodiments, the oil pump 4 is a gerotor gear pump. The cycloid gear pump also utilizes the change of the sealing volume between the teeth to realize oil absorption and pressure oil absorption. It is composed of oil distributing disc (front and back covers), external rotor 42 (driven wheel) and internal rotor 41 (driving wheel) eccentrically arranged in the pump body. The cycloid gear pump has many advantages, such as compact structure, small volume, few parts, high rotating speed of 10000r/mim, stable motion, low noise, high volumetric efficiency, etc.

Referring to fig. 5, in some embodiments, the reduction planetary gear set 12 includes a sun gear 121, a planet carrier 122, planet gears 123, and a ring gear 124;

the sun gear 121, the planet carrier 122 and the ring gear 124 are coaxially arranged;

the sun gear 121 is meshed with the planet gear 123, and the axis of the sun gear 121 is connected to the input shaft 2;

the planet gear 123 is meshed with the ring gear 124, and the axis of the planet gear 123 is connected with the planet carrier 122;

the axis of the planetary carrier 122 is connected to the output shaft 3;

the ring gear 124 is fixedly disposed in the first cavity 111 of the housing 11.

Connect in the axle center of sun gear 121 through input shaft 2, input shaft 2 drives sun gear 121 and rotates, and sun gear 121 pivoted in-process drives planet wheel 123 at ring gear 124 internal rotation, and wherein ring gear 124 is fixed to be set up in first cavity 111, and planet wheel 123 pivoted in-process drives planet carrier 122 and rotates, and then drives output shaft 3 and rotates, drives planet wheel 123 through sun gear 121 and rotates and then realize slowing down.

In some embodiments, the oil outlet 44 of the oil pump 4 is connected to a needle bearing on the input shaft 2 in the first cavity 111. Through connecting the oil outlet 44 of the oil pump 4 to the needle bearing on the input shaft 2 in the first cavity 111, only the needle bearing is lubricated, the speed reduction planetary gear set 12 does not need to be lubricated, the running resistance of the speed reduction planetary gear set 12 is reduced, the transmission effect is increased, and the over-high temperature of the speed reducer is avoided. In other embodiments, the oil outlet 44 of the oil pump 4 may be connected to the first cavity 111 to enable lubricating oil to invade the entire reduction planetary gear set 12, so as to ensure that the needle bearings are in the lubricating oil.

In some embodiments, a temperature sensor may be disposed on the speed reducer to detect the temperature of the speed reducer, and preferably, the temperature sensor is disposed in the second cavity 112 to detect the temperature of the lubricating oil in the second cavity 112.

Referring to fig. 2-4, in another embodiment, a vehicle includes, but is not limited to, a fuel-powered vehicle, a hybrid vehicle, an electric vehicle, a fuel-powered passenger vehicle, a hybrid passenger vehicle, an electric passenger vehicle, a fuel-powered special vehicle, a hybrid special vehicle, an electric special vehicle, etc.; the speed reducer of the vehicle is the planetary speed reducer 1 in the above embodiment, and includes a speed reduction planetary gear set 12, a housing 11, and an oil pump 4;

the housing 11 includes a first cavity 111, a second cavity 112 and an oil pan 113, the first cavity 111 and the second cavity 112 are coaxially disposed, the first cavity 111 is used for placing the reduction planetary gear set 12, the second cavity 112 is used for placing the oil pump 4, and the oil pan 113 is used for storing lubricating oil;

the speed reduction planetary gear set 12 comprises an input shaft 2, the input shaft 2 penetrates through the second cavity 112, and the input shaft 2 is used for being in transmission connection with a driving motor;

the oil pump 4 comprises an oil inlet 43, an oil outlet 44, an inner rotor 41 and an outer rotor 42, the inner rotor 41 is sleeved on the input shaft 2, the inner rotor 41 is in transmission connection with the input shaft 2, outer teeth of the inner rotor 41 are meshed with inner teeth of the outer rotor 42, the oil inlet 43 is connected to the oil pan 113 through an oil conveying pipe 45, and the oil outlet 44 is connected to a position needing lubrication in the first cavity 111.

The shell 11 of the speed reducer is provided with a first cavity 111, a second cavity 112 and an oil pan 113, so that lubricating oil is stored in the oil pan 113; the speed reduction planetary gear set 12 is arranged in the first cavity 111, the oil pump 4 is arranged in the second cavity 112, an oil inlet 43 of the oil pump 4 is connected to an oil pan 113 through an oil conveying pipe 45, an oil outlet 44 of the oil pump 4 is connected to a position needing to be lubricated in the first cavity 111, an input shaft 2 of the speed reduction planetary gear set 12 penetrates through the second cavity 112 to be connected to a driving motor in a transmission mode, the input shaft 2 of the speed reduction planetary gear set 12 is connected with an inner rotor 41 of the oil pump 4 in a transmission mode, in the process that the driving motor drives the input shaft 2 to rotate, the input shaft 2 is decelerated through the speed reduction planetary gear set 12 and then outputs through an output shaft 3 of the speed reduction planetary gear set 12, the input shaft 2 drives the inner rotor 41 of the oil pump 4 to rotate, the inner rotor 41 of the oil pump 4 is meshed with the outer rotor 42, the rotation of the outer rotor 41 drives the outer rotor 42 to rotate, the oil pump 4 extracts lubricating oil from the oil pan 113 through the oil conveying pipe 45, the lubricating oil enters the oil pump 4 through the oil inlet 43, the lubricating oil is sent into the position needing to be lubricated in the first cavity 111 through the oil outlet 44 of the oil pump 4, forced lubrication of the speed reduction planetary gear set 4 is realized, the speed reduction gear set 4 and the oil pump 12 are coaxially arranged, the structure is high in the structure, the structure has low cost and the low reliability and the low cost.

Referring to fig. 2-4, in another embodiment, a crane is a multi-action crane that can lift and move heavy objects vertically and horizontally within a certain range. The reducer of the crane is the planetary reducer 1 in the embodiment, and comprises a reduction planetary gear set 12, a shell 11 and an oil pump 4;

the housing 11 includes a first cavity 111, a second cavity 112 and an oil pan 113, the first cavity 111 and the second cavity 112 are coaxially disposed, the first cavity 111 is used for placing the reduction planetary gear set 12, the second cavity 112 is used for placing the oil pump 4, and the oil pan 113 is used for storing lubricating oil;

the speed reduction planetary gear set 12 comprises an input shaft 2, the input shaft 2 penetrates through the second cavity 112, and the input shaft 2 is used for being in transmission connection with a driving motor;

the oil pump 4 comprises an oil inlet 43, an oil outlet 44, an inner rotor 41 and an outer rotor 42, the inner rotor 41 is sleeved on the input shaft 2, the inner rotor 41 is in transmission connection with the input shaft 2, outer teeth of the inner rotor 41 are meshed with inner teeth of the outer rotor 42, the oil inlet 43 is connected to the oil pan 113 through an oil conveying pipe 45, and the oil outlet 44 is connected to a position needing lubrication in the first cavity 111.

The shell 11 of the speed reducer is provided with a first cavity 111, a second cavity 112 and an oil pan 113, so that lubricating oil is stored in the oil pan 113; the speed reduction planetary gear set 12 is arranged in the first cavity 111, the oil pump 4 is arranged in the second cavity 112, an oil inlet 43 of the oil pump 4 is connected to an oil pan 113 through an oil conveying pipe 45, an oil outlet 44 of the oil pump 4 is connected to a position needing to be lubricated in the first cavity 111, an input shaft 2 of the speed reduction planetary gear set 12 penetrates through the second cavity 112 to be connected to a driving motor in a transmission mode, the input shaft 2 of the speed reduction planetary gear set 12 is connected with an inner rotor 41 of the oil pump 4 in a transmission mode, in the process that the driving motor drives the input shaft 2 to rotate, the input shaft 2 is decelerated through the speed reduction planetary gear set 12 and then outputs through an output shaft 3 of the speed reduction planetary gear set 12, the input shaft 2 drives the inner rotor 41 of the oil pump 4 to rotate, the inner rotor 41 of the oil pump 4 is meshed with the outer rotor 42, the rotation of the outer rotor 41 drives the outer rotor 42 to rotate, the oil pump 4 extracts lubricating oil from the oil pan 113 through the oil conveying pipe 45, the lubricating oil enters the oil pump 4 through the oil inlet 43, the lubricating oil is sent into the position needing to be lubricated in the first cavity 111 through the oil outlet 44 of the oil pump 4, forced lubrication of the speed reduction planetary gear set 4 is realized, the speed reduction gear set 4 and the oil pump 12 are coaxially arranged, the structure is high in the structure, the structure has low cost and the low reliability and the low cost.

Finally, it should be noted that, although the above embodiments have been described in the text and drawings of the present application, the scope of the patent protection of the present application is not limited thereby. All technical solutions which are generated by replacing or modifying the equivalent structure or the equivalent flow according to the contents described in the text and the drawings of the present application, and which are directly or indirectly implemented in other related technical fields, are included in the scope of protection of the present application.

Claims (8)

1. A planetary reducer is characterized by comprising a reduction planetary gear set, a shell and an oil pump;

the shell comprises a first cavity, a second cavity and an oil pan, wherein the first cavity and the second cavity are coaxially arranged, the first cavity is used for placing a reduction planetary gear set, the second cavity is used for placing an oil pump, and the oil pan is used for storing lubricating oil;

the speed reduction planetary gear set comprises an input shaft, the input shaft penetrates through the second cavity, and the input shaft is in transmission connection with the driving motor;

the oil pump comprises an oil inlet, an oil outlet, an inner rotor and an outer rotor, the inner rotor is sleeved on the input shaft and is in transmission connection with the input shaft, outer teeth of the inner rotor are meshed with inner teeth of the outer rotor, the oil inlet is connected to the oil pan through an oil conveying pipe, and the oil outlet is connected to a position needing lubrication in the first cavity;

the inner rotor is connected with the input shaft through a key, and a transmission steel ball is arranged between the shaft sleeve and the inner rotor.

2. The planetary reducer according to claim 1, wherein the oil pump further includes an oil pump cover and an oil chamber cover, the oil pump cover and the oil chamber cover being provided on both sides of the second chamber;

the oil pump cover and the oil cavity cover are provided with through holes for the input shaft to pass through, the oil pump cover and the oil cavity cover are sleeved on the shaft sleeve, and the inner rotor and the outer rotor are arranged between the oil pump cover and the oil cavity cover;

the oil outlet is arranged on the oil pump cover;

the oil inlet is arranged on the oil cavity cover.

3. The planetary reducer according to claim 1, wherein a filter element is arranged in the oil pan, and an oil inlet of the oil pump is connected to the filter element through an oil delivery pipe.

4. The planetary reducer of claim 1, wherein the oil pump is a gerotor gear pump.

5. The planetary reducer of claim 1, wherein the reduction planetary gearset comprises a sun gear, a planet carrier, a planet gear, and a ring gear;

the sun gear, the planet carrier and the gear ring are coaxially arranged;

the sun wheel is meshed with the planet wheel, and the axis of the sun wheel is connected with the input shaft;

the planet gear is meshed with the gear ring, and the axis of the planet gear is connected with the planet carrier;

the axis of the planet carrier is connected with the output shaft;

the gear ring is fixedly arranged in the first cavity of the shell.

6. The planetary reducer of claim 1, wherein an oil outlet of the oil pump is connected to a needle bearing on the input shaft.

7. A crane, characterized in that the reducer of the crane is a planetary reducer according to any one of claims 1-6.

8. A vehicle, characterized in that the retarder of the vehicle is a planetary retarder according to any of the preceding claims 1-6.

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