CN113217266A - Hydraulic motor assembly and engineering machinery with same - Google Patents
Hydraulic motor assembly and engineering machinery with same Download PDFInfo
- Publication number
- CN113217266A CN113217266A CN202110476558.7A CN202110476558A CN113217266A CN 113217266 A CN113217266 A CN 113217266A CN 202110476558 A CN202110476558 A CN 202110476558A CN 113217266 A CN113217266 A CN 113217266A
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- China
- Prior art keywords
- hydraulic motor
- housing
- transmission shaft
- motor assembly
- shell
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Hydraulic Motors (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention provides a hydraulic motor assembly and an engineering machine with the same, wherein the hydraulic motor assembly comprises: the hydraulic motor comprises a hydraulic motor body, a first transmission shaft and a second transmission shaft, wherein the hydraulic motor body comprises a first shell and the first transmission shaft; the speed reducer comprises a second shell and a second transmission shaft, the first shell is connected with the second shell, the first transmission shaft is connected with the second transmission shaft, an oil passing gap is formed between the end part of the first transmission shaft facing the second shell and the first shell, and therefore the space in the first shell is communicated with the space in the second shell through the oil passing gap. The hydraulic motor assembly has the characteristics of compact structure and small occupied installation space.
Description
Technical Field
The invention relates to the technical field of engineering equipment, in particular to a hydraulic motor assembly and engineering machinery with the same.
Background
At present, in the domestic engineering machinery industry, the compactness of the structural design and the arrangement of a small-tonnage excavator is an unprecedented trend, which also brings limitation to the installation space of a hydraulic motor and puts higher requirements on the structural design of the motor. For a small-tonnage excavator, a common hydraulic motor on the market at present has a large axial size and occupies a large installation space, which is contrary to the design concept of compact structure and installation space saving. Therefore, how to reduce the axial size of the hydraulic motor is a problem which needs to be solved urgently in the industry.
Disclosure of Invention
Therefore, the invention aims to provide a hydraulic motor assembly with smaller axial dimension and a construction machine with the same.
In order to solve the above problems, the present invention provides a hydraulic motor assembly including: the hydraulic motor comprises a hydraulic motor body, a first transmission shaft and a second transmission shaft, wherein the hydraulic motor body comprises a first shell and the first transmission shaft; the speed reducer comprises a second shell and a second transmission shaft, the first shell is connected with the second shell, the first transmission shaft is connected with the second transmission shaft, an oil passing gap is formed between the end part of the first transmission shaft facing the second shell and the first shell, and therefore the space in the first shell is communicated with the space in the second shell through the oil passing gap.
Optionally, the hydraulic motor body further comprises an oil discharge channel, the oil discharge channel is arranged on the first shell, an oil inlet of the oil discharge channel is communicated with a space in the second shell, and an oil discharge port of the oil discharge channel is communicated with the outside.
Optionally, the oil inlet is provided on an end surface of the first housing facing the second housing, and the oil discharge port is provided at a side portion of the first housing.
Optionally, a bearing is arranged between the end of the first transmission shaft facing the second housing and the first housing, a bearing installation section is arranged on the first transmission shaft, and the width of the bearing installation section is matched with the thickness of the bearing.
Optionally, the first housing and the second housing are connected together by a fastener.
Optionally, the fastener is a screw.
Optionally, the hydraulic motor assembly further comprises a connection structure disposed between the first drive shaft and the second drive shaft, the connection structure being adapted to synchronize rotation of the first drive shaft and the second drive shaft.
Optionally, the hydraulic motor body further comprises: the cylinder body is arranged in the first shell, the first transmission shaft is connected with the cylinder body and synchronously rotates, and a plurality of piston cavities are formed in the cylinder body; the pistons are arranged in the piston cavities in a one-to-one correspondence manner; the end part of the piston, which is far away from the cylinder body, is connected to the return disc through a sliding shoe; the swash plate is fixedly arranged in the first shell, and the return plate is abutted against the swash plate.
The invention also provides engineering machinery comprising the hydraulic motor assembly.
Optionally, the work machine is an excavator.
The invention has the following advantages:
by utilizing the technical scheme of the invention, an oil seal structure is not arranged between the first transmission shaft and the first shell, and an oil passing gap is formed between the first transmission shaft and the first shell. On the one hand, hydraulic oil in the hydraulic motor body can enter the second shell of the speed reducer from the oil passing gap, and then the hydraulic oil replaces gear oil to lubricate the speed reducer. On the other hand, after the first transmission shaft is not provided with the oil seal structure any more, the axial length of the first transmission shaft can be shorter, and then the axial size of the hydraulic motor body is smaller, so that the installation space is saved. Therefore, the hydraulic motor assembly has the characteristics of compact structure and small occupied installation space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 shows a cross-sectional schematic view of a hydraulic motor assembly of the present invention;
FIG. 2 shows an enlarged schematic view at A in FIG. 1;
FIG. 3 shows an enlarged schematic view at B in FIG. 1;
FIG. 4 is a schematic structural view of an end portion of a first drive shaft of the hydraulic motor assembly of FIG. 1; and
fig. 5 shows a schematic connection diagram of the hydraulic motor body and the reducer of the hydraulic motor assembly of fig. 1.
Description of reference numerals:
10. a hydraulic motor body; 11. a first housing; 12. a first drive shaft; 121. a bearing mounting section; 13. an oil discharge passage; 131. an oil inlet; 132. an oil discharge port; 14. a cylinder body; 141. a piston cavity; 15. a piston; 16. a return disk; 17. a slipper; 18. a swash plate; 20. a speed reducer; 21. a second housing; 22. a second drive shaft; 30. an oil passing gap; 40. a bearing; 50. a fastener; 60. and (5) a connecting structure.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and 2, the hydraulic motor assembly of the present embodiment includes: a hydraulic motor body 10 and a reducer 20. The hydraulic motor body 10 includes a first housing 11 and a first transmission shaft 12. The speed reducer 20 includes a second housing 21 and a second transmission shaft 22, the first housing 11 and the second housing 21 are connected, and the first transmission shaft 12 and the second transmission shaft 22 are connected. Further, an oil passing gap 30 is provided between the end of the first transmission shaft 12 facing the second housing 21 and the first housing 11, so that the space in the first housing 11 and the space in the second housing 21 communicate with each other through the oil passing gap 30.
With the technical solution of the present embodiment, an oil seal structure is not provided between the first transmission shaft 12 and the first housing 11, and an oil passing gap 30 is formed between the first transmission shaft 12 and the first housing 11. On the one hand, the hydraulic oil in the hydraulic motor body can enter the second housing 21 of the speed reducer 20 from the oil passing gap 30, so that the hydraulic oil can replace gear oil to lubricate the speed reducer 20. On the other hand, after the first transmission shaft 12 is not provided with the oil seal structure, the axial length of the first transmission shaft 12 can be shorter, and then the axial size of the hydraulic motor body is smaller, so that the installation space is saved. Therefore, the hydraulic motor assembly of the embodiment has the characteristics of compact structure and small occupied installation space.
It should be noted that, in the hydraulic motor in the prior art, an oil seal structure (an annular seal ring) is arranged between the transmission shaft and the end cover, so that the axial dimension of the transmission shaft is long, and the cavities between the hydraulic motor and the speed reducer are not communicated with each other. And the speed reducer in the prior art independently adopts gear oil for lubrication. In the present embodiment, the oil seal structure on the first transmission shaft 12 is eliminated, so that the hydraulic oil in the first housing 11 can enter the second housing 21 along the oil gap 30, that is, the reduction gear 20 is lubricated by the hydraulic oil. On one hand, gear oil does not need to be adopted for lubrication in the speed reducer, so that the cost is reduced, and on the other hand, a step surface for installing an oil seal structure does not need to be arranged on the first transmission shaft 12, so that the axial length of the first transmission shaft 12 is shortened, and the axial size of the hydraulic motor body 10 is shortened.
Further, after passing through the oil passage gap 30, the hydraulic oil flows into the second casing 21 through the gap between the second casing 21 and the second transmission shaft 22, and lubricates the reduction gear 20.
As shown in fig. 1, in the solution of the present embodiment, the hydraulic motor body 10 further includes an oil discharge channel 13, the oil discharge channel 13 is disposed on the first housing 11, an oil inlet 131 of the oil discharge channel 13 communicates with a space inside the second housing 21, and an oil discharge port 132 of the oil discharge channel 13 communicates with the outside. Specifically, the lubricating oil in the speed reducer 20 can enter the oil discharge channel 13 through the oil inlet 131 and then be discharged at the oil discharge port through the oil discharge channel 13. Further, an oil port communicating with the oil inlet 131 is provided on the second housing 21.
As shown in fig. 1, in the solution of the present embodiment, an oil inlet 131 is provided on an end surface of the first housing 11 facing the second housing 21, and an oil discharge port 132 is provided on a side portion of the first housing 11. Specifically, the oil inlet 131 is located on an end surface where the first housing 11 and the second housing 21 contact each other, so that the hydraulic oil in the second housing 21 can enter into the oil discharge passage 13 through the oil inlet 131. The oil drain port 132 is provided at a side portion of the first housing 11 in the circumferential direction.
As shown in fig. 2 and 4, in the solution of the present embodiment, a bearing 40 is disposed between the end of the first transmission shaft 12 facing the second housing 21 and the first housing 11, a bearing installation section 121 is disposed on the first transmission shaft 12, and the width of the bearing installation section 121 is adapted to the thickness of the bearing 40. As can be seen from fig. 4, since the oil seal structure is not provided on the hydraulic motor body 10, the width of the bearing mounting section 121 is adapted to the thickness of the bearing 40, and it is not necessary to assemble the oil seal at an increased thickness. The first transmission shaft 12 is therefore characterized by a small axial dimension.
As shown in fig. 5, in the solution of the present embodiment, the first housing 11 and the second housing 21 are connected together by a fastener 50. Further, the connection mode between the first housing 11 and the second housing 21 is a two-hole embedded connection structure. And preferably, the above-mentioned fastener 50 is a screw.
As shown in fig. 4, in the solution of the present embodiment, the hydraulic motor assembly further includes a connecting structure 60 disposed between the first transmission shaft 12 and the second transmission shaft 22, and the connecting structure 60 is adapted to enable the first transmission shaft 12 and the second transmission shaft 22 to rotate synchronously. Specifically, the connection structure 60 allows the second transmission shaft 22 to rotate in synchronization with the first transmission shaft 12 when the first transmission shaft 12 rotates, thereby enabling the output power of the hydraulic motor body 10 to be reduced in speed by the speed reducer 20. Further, the connecting structure 60 includes a tooth-shaped structure disposed between the first transmission shaft 12 and the second transmission shaft 22, an outer gear structure is disposed on an outer surface of an end portion of the first transmission shaft 12, and an inner gear structure is recessed and disposed on an end portion of the second transmission shaft 22. The external gear structure and the internal gear structure are engaged with each other, thereby causing the first transmission shaft 12 and the second transmission shaft 22 to rotate synchronously.
As shown in fig. 3, in the present embodiment, the hydraulic motor body 10 further includes a cylinder block 14, a plurality of pistons 15, a return disc 16, and a swash plate 18. Wherein, the cylinder 14 is arranged in the first housing 11, the first transmission shaft 12 is connected with the cylinder 14 and rotates synchronously, and the cylinder 14 is provided with a plurality of piston cavities 141. The plurality of pistons 15 are disposed in the piston chamber 141 in a one-to-one correspondence. The end of the piston 15 facing away from the cylinder 14 is connected to a return plate 16 via a slide shoe 17. The swash plate 18 is fixedly provided in the first housing 11, and the return plate 16 abuts against the swash plate 18. Specifically, when the hydraulic motor body 10 is operated, the hydraulic drive piston 15 extends and contracts reciprocally in the piston chamber 141, and when the piston 15 extends, a lateral component force is generated in the swash plate 18 to push the cylinder block 14 to rotate, thereby driving the first transmission shaft 12 to rotate.
The embodiment also provides the engineering machinery, and the engineering machinery comprises the hydraulic motor assembly. Preferably, the working machine is an excavator, but of course, the working machine may also be of other constructions, such as a pump truck, a crane, etc.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A hydraulic motor assembly, comprising:
a hydraulic motor body (10), the hydraulic motor body (10) comprising a first housing (11) and a first transmission shaft (12);
a speed reducer (20), the speed reducer (20) comprising a second housing (21) and a second transmission shaft (22), a first housing (11) connected to the second housing (21), the first transmission shaft (12) connected to the second transmission shaft (22),
wherein an oil passing gap (30) is formed between the end part of the first transmission shaft (12) facing the second shell (21) and the first shell (11), so that the space in the first shell (11) is communicated with the space in the second shell (21) through the oil passing gap (30).
2. The hydraulic motor assembly according to claim 1, wherein the hydraulic motor body (10) further comprises an oil discharge passage (13), the oil discharge passage (13) being provided on the first housing (11), an oil inlet (131) of the oil discharge passage (13) communicating with a space inside the second housing (21), and an oil discharge port (132) of the oil discharge passage (13) communicating with the outside.
3. The hydraulic motor assembly according to claim 2, characterized in that the oil inlet (131) is provided on an end face of the first housing (11) facing the second housing (21), and the oil discharge port (132) is provided at a side of the first housing (11).
4. The hydraulic motor assembly according to claim 1, characterized in that a bearing (40) is arranged between the end of the first transmission shaft (12) facing the second housing (21) and the first housing (11), and a bearing mounting section (121) is arranged on the first transmission shaft (12), and the width of the bearing mounting section (121) is adapted to the thickness of the bearing (40).
5. The hydraulic motor assembly of claim 1, wherein the first housing (11) and the second housing (21) are connected together by a fastener (50).
6. The hydraulic motor assembly of claim 5, wherein the fastener is a screw.
7. The hydraulic motor assembly according to claim 5, further comprising a connection structure (60) disposed between the first and second drive shafts (12, 22), the connection structure (60) being adapted to synchronize rotation of the first and second drive shafts (12, 22).
8. The hydraulic motor assembly of claim 1, wherein the hydraulic motor body (10) further comprises:
the cylinder body (14) is arranged in the first shell (11), the first transmission shaft (12) is connected with the cylinder body (14) and synchronously rotates, and a plurality of piston cavities (141) are formed in the cylinder body (14);
a plurality of pistons (15), the plurality of pistons (15) being disposed in the piston cavity (141) in a one-to-one correspondence;
a return disc (16), the end of the piston (15) facing away from the cylinder (14) being connected to the return disc (16) by a slipper (17);
and a swash plate (18) fixedly arranged in the first housing (11), wherein the return disc (16) is abutted against the swash plate (18).
9. A working machine, characterized by comprising a hydraulic motor assembly according to any one of claims 1-8.
10. The work machine of claim 9, wherein the work machine is an excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110476558.7A CN113217266A (en) | 2021-04-29 | 2021-04-29 | Hydraulic motor assembly and engineering machinery with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110476558.7A CN113217266A (en) | 2021-04-29 | 2021-04-29 | Hydraulic motor assembly and engineering machinery with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113217266A true CN113217266A (en) | 2021-08-06 |
Family
ID=77090060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110476558.7A Pending CN113217266A (en) | 2021-04-29 | 2021-04-29 | Hydraulic motor assembly and engineering machinery with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113217266A (en) |
-
2021
- 2021-04-29 CN CN202110476558.7A patent/CN113217266A/en active Pending
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