CN115839300A - Non-circular planetary gear hydraulic motor - Google Patents

Abstract

The invention discloses a non-circular planetary gear hydraulic motor which comprises a shell, an output shaft and a non-circular planetary gear mechanism, wherein the shell is provided with a front channel and a rear channel, the output shaft is provided with a first groove, a front end cover, a front valve plate, a rear valve plate and a rear end cover are sequentially sleeved along the axial direction of the output shaft, the front end cover, the rear end cover and the inner wall of the shell form a working cavity, the front channel and the rear channel are communicated with the working cavity, the front valve plate and the rear valve plate are positioned in the working cavity, the front valve plate and the rear valve plate are provided with valve holes, the non-circular planetary gear mechanism comprises an inner gear ring, a planetary gear and a central wheel, the inner gear ring, the planetary gear and the central wheel are positioned between the front valve plate and the rear valve plate, the inner gear ring is in pin connection with the inner wall of the shell, a convex pin matched with the first groove is arranged on the inner side of the central wheel, and the planetary gear is meshed with the inner gear ring and the central wheel. The non-circular planetary gear hydraulic motor provided by the invention has the advantages of stable transmission of the output shaft, convenience in part processing and high assembly efficiency.

Description

Non-circular planetary gear hydraulic motor

Technical Field

The invention relates to the technical field of hydraulic motors, in particular to a non-circular planetary gear hydraulic motor.

Background

At present, a handheld rotary tool used in coal mines and explosion-proof safety occasions is required to complete operation work, and operation equipment is required to meet safety standards. The handheld emulsion rotary tool takes emulsion meeting the safety requirements of underground coal mines as a working medium, has the characteristics of low noise, large specific power of unit weight, high working efficiency and the like, gradually replaces the handheld pneumatic rotary tool with high noise, small specific power of unit weight and low energy utilization rate, and has better application prospect than the handheld pneumatic rotary tool, and the core of the handheld emulsion rotary tool is a small-displacement high-water-base emulsion motor. In the related technology, the inner gear ring of the non-circular planetary gear mechanism is connected with the front valve plate by the axial positioning pin, and the front valve plate is connected with the front end of the shell by the axial positioning pin, so that the problems of difficult positioning and inconvenient assembly exist; the shell has a complex structure and is difficult to machine to ensure the precision; the non-circular planetary gear mechanism and the valve plate are sealed by end faces, so that the abrasion is fast, and the service life is short; meanwhile, the key parts of the small-displacement high-water-base emulsion motor have small radial size of a central wheel, and an inner groove cannot be machined and connected and fixed with a main shaft, so that the structure cannot be designed into the small-displacement high-water-base emulsion motor. The related technology also provides a motor structure, wherein the middle front and rear spacer sleeves and the front and rear valve plates of the motor structure are not axially positioned, rotate in the work, cannot normally valve and cannot work; and the front and rear valve plates in the structure have no sealing structure, so that pressure cannot be built, and normal work cannot be realized.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a non-circular planetary gear hydraulic motor which has the advantages of stable output shaft transmission, convenience in part machining, easiness in ensuring of part machining precision and high assembling efficiency.

According to the non-circular planetary gear hydraulic motor provided by the embodiment of the invention, the non-circular planetary gear hydraulic motor comprises a shell, an output shaft and a non-circular planetary gear mechanism, wherein the shell is provided with a front channel and a rear channel, the output shaft is provided with a first groove, a front end cover, a front flow distribution plate, a rear flow distribution plate and a rear end cover are sequentially sleeved along the axial direction of the output shaft, the front end cover, the rear end cover and the inner wall of the shell form a working cavity, the front channel and the rear channel are communicated with the working cavity, the front flow distribution plate and the rear flow distribution plate are positioned in the working cavity, the front flow distribution plate and the rear flow distribution plate are provided with flow distribution holes, the non-circular planetary gear mechanism comprises an inner gear ring, a planetary gear and a central wheel, the inner gear ring, the planetary gear and the central wheel are positioned between the front flow distribution plate and the rear flow distribution plate, the inner gear ring is in pin joint with the inner wall of the shell, the inner side of the central wheel is provided with a convex pin joint with the first groove, the planetary gear is meshed with the central wheel, and the front channel, the front flow distribution plate, the non-circular planetary gear mechanism and the rear flow distribution plate are sequentially communicated with the rear flow distribution hole.

The non-circular planetary gear hydraulic motor provided by the embodiment of the invention has the advantages of stable transmission of an output shaft, convenience in part machining, easiness in ensuring of part machining precision and high assembly efficiency.

In some embodiments, the working chamber is provided with a front bearing sleeve and a rear bearing sleeve respectively attached to the front end cover and the rear end cover, and the bearings are assembled between the front end cover and the front bearing sleeve and between the rear end cover and the rear bearing sleeve.

In some embodiments, the front bearing sleeve and the rear bearing sleeve are both connected to the housing, and the inner bore of the front bearing sleeve and the inner bore of the rear bearing sleeve are provided with rotary seal rings.

In some embodiments, the distribution hole is a stepped distribution hole, the stepped distribution hole includes a first hole section and a second hole section, the aperture of the first hole section is larger than that of the second hole section, the first hole section is located on one side of the front distribution plate or the rear distribution plate, which is far away from the working cavity, and the projection of the second hole section on the plane of one side of the front distribution plate or the rear distribution plate, which is far away from the working cavity, coincides with the projection of the first hole section.

In some embodiments, the front valve plate and the rear valve plate are connected with the inner gear ring through positioning pins, the front valve plate and the rear valve plate are provided with positioning holes, and one ends of the positioning holes are closed.

In some embodiments, the inner gear ring is provided with a through hole for the positioning pin to pass through.

In some embodiments, the first groove extends along an axial direction of the output shaft, and a plurality of first grooves are uniformly distributed on the surface of the output shaft.

In some embodiments, the output shaft has a stepped structure, a step of the output shaft is located between the front port plate and the rear port plate, and the length of the first groove is adapted to the distance between the front port plate and the rear port plate.

In some embodiments, a plurality of second grooves are uniformly distributed on the inner wall of the housing, a plurality of third grooves are uniformly distributed on the outer wall of the ring gear, the third grooves correspond to the second grooves of the housing one to one, and the second grooves and the third grooves are matched with a fixing pin to fix the ring gear.

In some embodiments, the tooth profiles of the ring gear and the center gear are double-circular-arc tooth profiles.

Drawings

FIG. 1 is a schematic cross-sectional view of a non-circular planetary gear hydraulic motor according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the output shaft of the non-circular planetary gear hydraulic motor according to the embodiment of the invention.

FIG. 3 is a schematic diagram of a front port plate of a non-circular planetary hydraulic motor according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a front port plate of a non-circular planetary hydraulic motor according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a rear port plate of a non-circular planetary hydraulic motor according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of a rear port plate of a non-circular planetary hydraulic motor according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of the center wheel of a non-circular planetary gear hydraulic motor according to an embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of the center wheel of a non-circular planetary gear hydraulic motor according to an embodiment of the present invention.

Fig. 9 is a schematic view of the ring gear of the non-circular planetary gear hydraulic motor according to the embodiment of the present invention.

Fig. 10 is a sectional view schematically showing the ring gear of the non-circular planetary gear hydraulic motor according to the embodiment of the present invention.

FIG. 11 is a schematic cross-sectional view of a housing of a non-circular planetary hydraulic motor in an embodiment in accordance with the invention.

Fig. 12 isbase:Sub>A schematic sectional view in thebase:Sub>A-base:Sub>A direction ofbase:Sub>A housing ofbase:Sub>A non-circular planetary gear hydraulic motor according to an embodiment of the present invention.

Reference numerals: 1. an output shaft; 2. a front end cover; 3. a front bearing housing; 4. a first bearing; 5. a housing; 6. a front port plate; 7. an inner gear ring; 8. a fixing pin; 9. a planetary gear; 10. a center wheel; 11. a rear port plate; 12. a rear bearing housing; 13. a second bearing; 14. a rear end cap; 15. locking the nut; 16. rotating the sealing ring; 17. positioning pins; 18. a dustproof sealing ring; 19. a distributing hole; 20. a first groove; 21. a second groove; 22. a third groove; 23. positioning holes; 24. and a through hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

According to the non-circular planetary gear hydraulic motor of the embodiment of the invention, as shown in fig. 1 to 12, the non-circular planetary gear hydraulic motor comprises a shell 5, an output shaft 1 and a non-circular planetary gear mechanism, wherein the shell 5 is provided with a front channel and a rear channel, the output shaft 1 is provided with a first groove 20, the first groove 20 can extend along the axial direction of the output shaft 1, the output shaft 1 is sequentially sleeved with a front end cover 2, a front port plate 6, a rear port plate 11 and a rear end cover 14 along the axial direction, the front end cover 2, the rear end cover 14 and the inner wall of the shell 5 form a working cavity, the front channel and the rear channel are communicated with the working cavity, the front port plate 6 and the rear port plate 11 are positioned in the working cavity, the front valve plate 6 and the rear valve plate 11 are both provided with a flow distribution hole 19, the front channel is communicated with the flow distribution hole 19 of the front valve plate 6, the rear channel is communicated with the flow distribution hole 19 of the rear valve plate 11, the non-circular planetary gear mechanism comprises an inner gear ring 7, a planetary gear 9 and a central wheel 10, the inner gear ring 7, the planetary gear 9 and the central wheel 10 are positioned between the front valve plate 6 and the rear valve plate 11, the inner gear ring 7 is in pin joint with the inner wall of the shell 5, a convex pin matched with a first groove 20 is arranged on the inner side of the central wheel 10, the planetary gear 9 is meshed with the inner gear ring 7 and the central wheel 10, the front channel is communicated with the flow distribution hole 19 of the front valve plate 6, and the flow distribution hole 19 of the rear valve plate 11 is communicated with the rear channel. The front end cover 2 and the rear end cover 14 are fixedly connected with the shell 5, and the front end cover 2 and the rear end cover 14 can be fixed with the shell 5 through screws. The output shaft 1 is matched with the convex pin of the central wheel 10 through the first groove 20 to fix the central wheel 10, the fixation of the non-circular planetary gear mechanism and the stable transmission of energy transmission in the working process are realized, the shell structure is simple, the processing is convenient, the part processing precision is easy to guarantee, the assembly efficiency is improved due to the fact that the assembly and disassembly are convenient. The central wheel 10 and a plurality of planet gears 9 are constantly changed in the closed space formed by the internal gear ring 7 and the valve plates on the two sides, and the central wheel 10 is driven to drive the output shaft 1 to rotate so as to output power.

The non-circular planetary gear hydraulic motor provided by the embodiment of the invention has the advantages of stable output shaft transmission, convenience in part machining, easiness in ensuring of part machining precision and high assembly efficiency.

In some embodiments, as shown in fig. 1, the working chamber is provided with a front bearing housing 3 and a rear bearing housing 12 respectively attached to the front end cover 2 and the rear end cover 14, and the bearings are assembled between the front end cover 2 and the front bearing housing 3 and between the rear end cover 14 and the rear bearing housing 12.

Specifically, the bearing includes first bearing 4 and second bearing 13, and front end housing 2 and rear end housing 14 set up preceding bearing housing 3 respectively and rear bearing housing 12 assembles first bearing 4 and second bearing 13 respectively, and front and rear bearing housing 12 can pass through screw fixed connection with casing 5, makes things convenient for the dismouting to change the bearing. And a second bearing 13 is arranged at one end of the rear bearing sleeve 12 far away from the working cavity, and the second bearing 13 is positioned by adopting a locking nut 15.

In some embodiments, as shown in fig. 1, the front bearing sleeve 3 and the rear bearing sleeve 12 are both connected to the housing 5, and the inner bore of the front bearing sleeve 3 and the inner bore of the rear bearing sleeve 12 are provided with rotary seal rings 16.

Specifically, placing the rotary seal ring 16 can prevent the fluid from permeating into the bearing to damage the bearing, the rotary seal ring 16 further improves the sealing performance, avoids influencing the working performance, and prolongs the service life of the non-circular planetary gear hydraulic motor.

In some embodiments, as shown in fig. 1 and 3 to 6, the orifice 19 is a stepped orifice 19, the stepped orifice 19 includes a first orifice section and a second orifice section, the first orifice section has a larger aperture than the second orifice section, the first orifice section is located on a side of the front or rear orifice plate 6 or 11 facing away from the working chamber, and a projection of a plane of the second orifice section on a side of the front or rear orifice plate 6 or 11 facing away from the working chamber coincides with a projection of the first orifice section.

Specifically, the stepped distributing hole 19 increases the flow area and improves the volumetric efficiency of the non-circular planetary gear hydraulic motor, the aperture of the first hole section is larger than the aperture of the second hole section, so that the cross-sectional area of the first hole section is larger than that of the second hole section, the second hole section points to the working cavity, the first hole section points to the front channel or the rear channel, and the second hole section points to the non-circular planetary gear mechanism 10.

In some embodiments, as shown in fig. 1, 4 and 6, the front port plate 6 and the rear port plate 11 are connected with the ring gear 7 through the positioning pin 17, the front port plate 6 and the rear port plate 11 are provided with positioning holes 23, and one end of each positioning hole 23 is closed.

Specifically, the positioning pins 17 connect the front port plate 6, the rear port plate 11 and the inner gear ring 7 into a whole, the number of the positioning pins 17 can be three or more, the positioning holes 23 are uniformly distributed on the front port plate 6 and the rear port plate 11, and one positioning pin 17 penetrates into each positioning hole 23 to fix the front port plate 6 or the rear port plate 11 and the inner gear ring 7.

In some embodiments, as shown in fig. 1 and 9, the ring gear 7 is provided with a through hole 24 through which the positioning pin 17 passes.

Specifically, the inner gear ring 7 is provided with a through hole 24 for the positioning pin 17 to pass through, and two ends of the positioning pin 17 respectively enter the positioning holes 23 of the front port plate 6 and the rear port plate 11, so that the fixed connection of the front port plate 6, the rear port plate 11 and the inner gear ring 7 is ensured, and the axial movement of the positioning pin 17 is reduced.

In some embodiments, as shown in fig. 1 and 2, the first groove 20 extends along the axial direction of the output shaft 1, and the plurality of first grooves 20 are uniformly distributed on the surface of the output shaft 1.

Specifically, the first grooves 20 are distributed on the surface of the output shaft 1 at equal intervals along the circumferential direction, the first grooves 20 are matched with the convex pins of the central wheel 10, and the transmission of the output shaft 1 can be more stable due to the equal intervals of the first grooves 20.

In some embodiments, as shown in fig. 1 and 2, the output shaft 1 has a stepped structure, a step of the output shaft 1 is located between the front port plate 6 and the rear port plate 11, and the length of the first groove 20 is adapted to the distance between the front port plate 6 and the rear port plate 11.

Specifically, the output shaft 1 is an output shaft with a step structure, the first groove 20 on the output shaft 1 extends to the next step, the diameter of the output shaft 1 decreases gradually along with the distance from the rear end cover 14 in a segmented manner, the output shaft 1 is divided into multiple segments, the diameter of each segment of the output shaft 1 is different, and the diameter of the output shaft 1 is reduced to facilitate the installation of the central wheel 10 and the front valve plate 6.

In some embodiments, as shown in fig. 1, 9, 11, and 12, a plurality of second grooves 21 are uniformly distributed on the inner wall of the housing 5, a plurality of third grooves 22 are uniformly distributed on the outer wall of the ring gear 7, the third grooves 22 correspond to the second grooves 21 of the housing 5 one to one, and the second grooves 21 and the third grooves 22 are matched with the fixing pins 8 to fix the ring gear 7.

Specifically, the second groove 21 and the third groove 22 are correspondingly spliced to form a hole for accommodating the fixing pin 8, so that the ring gear 7 and the shell 5 are fixed, and the ring gear 7 is prevented from rotating relative to the shell 5.

In some embodiments, as shown in fig. 1, the non-circular planetary hydraulic motor further includes a dust seal 18, and the dust seal 18 is disposed between the front end cover 2 and the output shaft 1.

In particular, the dust seal 18 can prevent external dust from entering the cavity from the front end cover 2. Further, the tail end of the output shaft 1 is provided with a sealing ring to prevent leakage from damaging the shell 5.

In some embodiments, the tooth profile of the ring gear and the central wheel is a double circular arc tooth profile.

Specifically, the inner gear ring 7 can be a six-step double-circular-arc inner gear, the central gear 10 can be a four-step double-circular-arc gear, the planetary gear 9 can be a straight cylindrical gear, and two end faces of the inner gear ring 7 are respectively provided with six uniformly distributed positioning pin 17 holes which are respectively connected with the valve plates on two sides in a positioning manner through the positioning pins 17.

A use method of a non-circular planetary gear hydraulic motor comprises the steps that openings are formed in two opposite ends of a shell 5, a front end cover 2 and a rear end cover 14 are installed, an output shaft 1 penetrates through the front end cover 2 to enter the shell 5 and extend to one side of the rear end cover 14, a front bearing sleeve 3, a front valve plate 6, a non-circular planetary gear mechanism, a rear valve plate 11 and a rear bearing sleeve 12 are sleeved on the output shaft 1, the front bearing sleeve 3 and the rear bearing sleeve 12 are used for assembling bearings to reduce abrasion of the output shaft 1, a front channel and a rear channel of the shell 5 are used for conveying and discharging high-pressure liquid to a working cavity, the front valve plate 11 and the rear valve plate 11 are used for distributing the high-pressure liquid to enter the non-circular planetary gear mechanism, the high-pressure liquid drives a planetary gear 9 to rotate in a gap between an inner gear ring 7 and a central gear 10 after entering the non-circular planetary gear mechanism, the central gear 10 is driven to rotate so as to drive the output shaft 1 to rotate, and the rear valve plate 11 guides the high-pressure liquid in the planetary gear 9 mechanism to discharge so that the non-circular planetary gear mechanism can work stably.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are illustrative and not to be construed as limiting the present invention and that many changes, modifications, substitutions and alterations can be made in the above embodiments by one of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A non-circular planetary gear hydraulic motor, comprising:

a housing having a front channel and a rear channel;

the output shaft is provided with a first groove, a front end cover, a front valve plate, a rear valve plate and a rear end cover are sequentially sleeved along the axial direction of the output shaft, a working cavity is formed by the front end cover, the rear end cover and the inner wall of the shell, the front channel and the rear channel are communicated with the working cavity, the front valve plate and the rear valve plate are positioned in the working cavity, and the front valve plate and the rear valve plate are provided with valve holes; and

the non-circular planetary gear mechanism comprises an inner gear ring, a planetary gear and a central wheel, the inner gear ring, the planetary gear and the central wheel are positioned between the front valve plate and the rear valve plate, the inner gear ring is in pin joint with the inner wall of the shell, a convex pin matched with the first groove is arranged on the inner side of the central wheel, and the planetary gear is meshed with the inner gear ring and the central wheel;

the front channel, the distributing hole of the front distributing plate, the non-circular planetary gear mechanism, the distributing hole of the rear distributing plate and the rear channel are communicated in sequence.

2. The non-circular planetary gear hydraulic motor according to claim 1, wherein the working chamber is provided with a front bearing housing and a rear bearing housing respectively attached to the front end cover and the rear end cover, and bearings are assembled between the front end cover and the front bearing housing and between the rear end cover and the rear bearing housing.

3. The non-circular planetary gear hydraulic motor according to claim 2, wherein the front bearing housing and the rear bearing housing are both connected to the housing, and the inner bore of the front bearing housing and the inner bore of the rear bearing housing are provided with rotary seal rings.

4. The non-circular planetary gear hydraulic motor according to claim 1, wherein the port is a stepped port including a first port section and a second port section, the first port section has a larger diameter than the second port section, the first port section is located on a side of the front port plate or the rear port plate facing away from the working chamber, and a projection of the second port section on a plane of the side of the front port plate or the rear port plate facing away from the working chamber coincides with a projection of the first port section.

5. The non-circular planetary gear hydraulic motor according to claim 1, wherein the front port plate and the rear port plate are connected to the ring gear by a positioning pin, and both the front port plate and the rear port plate are provided with positioning holes, one end of each positioning hole being closed.

6. The non-circular planetary gear hydraulic motor according to claim 5, wherein the ring gear is provided with a through hole through which the positioning pin passes.

7. The non-circular planetary gear hydraulic motor according to claim 1, wherein the first grooves extend in an axial direction of the output shaft, and a plurality of first grooves are evenly distributed on a surface of the output shaft.

8. The non-circular planetary gear hydraulic motor according to claim 7, wherein the output shaft has a stepped structure, a step of the output shaft is located between the front port plate and the rear port plate, and the length of the first recess is adapted to the distance between the front port plate and the rear port plate.

9. The non-circular planetary gear hydraulic motor according to claim 1, wherein a plurality of second grooves are uniformly distributed on the inner wall of the housing, a plurality of third grooves are uniformly distributed on the outer wall of the ring gear, the third grooves correspond to the second grooves of the housing one to one, and the second grooves and the third grooves are matched with a fixing pin to fix the ring gear.

10. The non-circular planetary gear hydraulic motor according to claim 1, wherein the tooth profiles of the ring gear and the sun gear are a double circular arc tooth profile.

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