JPH11325223A - Hydraulic motor device with reduction gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly improve maintenance and inspection work for a lubricating oil in a reducing gear mounted on a motor by integrally forming the cylindrical portion of an oil gage with a housing for hydraulic motor and arranging it near a rotary portion of the motor to support the oil gage with the cover of the motor. SOLUTION: A hydraulic motor device with a reducing gear wherein a reducing gear 14 is joined to a hydraulic motor 12 to supply pressure oil to the hydraulic motor 12 for driving a reducing gear mechanism of the reduction gear 14 engaged with the driving shaft of the hydraulic motor 12 includes an open 34 formed in the side face of a housing 16 encircling a rotary port of the hydraulic motor 12, with one end of the open hole 34 opening to the upper face of the reduction gear mechanism through the reduction gear 14 and the other end opening to the upper face of the cover 24 of the hydraulic motor 12, and an oil gate 38 inserted and arranged in the open hole 34 to identify the level of a lubricating oil in the reduction gear 14 via the opening at the side of the cover 34, the oil gage 38 being mounted in the opening via an engaging means 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic motor device with a speed reducer for turning a hydraulic shovel and the like, and more particularly to an improvement of a hydraulic motor device with a speed reducer which has improved workability such as maintenance management. .

[0002]

2. Description of the Related Art As a conventional hydraulic motor device with a speed reducer of this type, a hydraulic motor device having the structure shown in FIG. 6 is known.

That is, in FIG. 6, a hydraulic motor device with a speed reducer 50 comprises a hydraulic motor portion 52 and a speed reducer portion 54, and the speed reducer portion 54 is integrally formed with a motor housing 55. The upper surface is covered by the cover part 56. In addition, the cover portion 56 includes
An oil gauge 58 is attached. The oil gauge 58 is installed substantially in parallel with the drive axis of the reduction gear unit 54 or the hydraulic motor unit 52, and is provided inside a cylindrical tubular portion 58a with one end 59a of the gauge 59 at the top and the other end 59d.
b into the cover 56 of the speed reducer 54, and
9 is attached to and supported by the tubular portion 58a so that it can be manually attached and detached.

[0004] The oil level in the reduction gear section 54 is
9 can be removed and confirmed by the degree of adhesion of oil to the tip portion 59b. Further, the cover 56 is provided with an oil supply port 60 at a location different from the oil gauge 58.

[0005]

However, in the prior art, when a hydraulic motor device with a speed reducer is used for turning a hydraulic excavator, a valve for operating the hydraulic excavator, a turning motor, Due to the layout of cylinders, center joints, etc., each device and device must be arranged in a very narrow space, and the hydraulic piping connecting each device and device intersects in a complicated manner. The problem that the pipe interferes with the oil gauge 58 provided at a distance,
0 is provided at the position of the cover portion 56 of the speed reducer portion 5 which is located relatively below the upper surface of the hydraulic motor portion 25, so that the pipe is provided above the oil supply port 60. There is a problem in that, for example, it becomes a major problem in the maintenance and inspection work of the reduction gear transmission.

[0006] In recent years, the external shape of the excavator has been reduced in order to ensure operational safety, and therefore the space in which the hydraulic equipment, the speed reducer, and the like are mounted is extremely limited. In the hydraulic motor device 50 with the reduction gear of the conventional hydraulic shovel, the oil detecting hole of the reduction gear 54 Since it is provided separately from the housing 55 of the motor section 52 and the oil supply port 60 is located considerably below the hydraulic motor section 52, there is a problem that piping work and oil supply become extremely difficult.

Further, the cylindrical portion 58 of the oil gauge 58
Depending on the method of supporting the gauge 59 with respect to a, when the cylinder portion 58a is provided with an air bleeding function in the speed reducer portion 54, there is a problem that water may enter from the upper end portion of the cylinder portion 58a. .

The inventors of the present invention have conducted intensive studies and, as a result, have connected the reduction gear unit to the hydraulic motor unit, supplied the hydraulic oil to the hydraulic motor unit, and engaged the drive shaft of the hydraulic motor unit. In a hydraulic motor device with a speed reducer configured to drive a speed reduction mechanism of the speed reducer unit, a drive shaft of the hydraulic motor unit is integrally formed with a side surface of a housing surrounding a rotary portion of the hydraulic motor unit. A through hole consisting of a cylindrical hole substantially parallel to and adjacent to the rotary portion is provided, and one end or lower end of the through hole is opened on the upper surface of the speed reduction mechanism with respect to the speed reducer, and the other end or upper end is
An opening is formed on the upper surface of the cover of the hydraulic motor unit, an engaging means such as a screw portion is formed in the opening on the cover side, and an oil for checking the level of the lubricating oil of the reduction gear unit is formed in the through hole. The gauge is inserted and arranged, and the gauge is attached and fixed via the engaging means, so that the through hole is formed integrally with the housing of the hydraulic motor unit and on the drive shaft as an oil inspection hole for the lubricating oil of the reduction gear unit. By providing it in close proximity, the piping work is facilitated, and by providing the through-hole to the cover of the hydraulic motor unit, it can be used as a refueling port at a high position, such as for maintenance management. It has been found that the work is easy and the above problem can be solved.

Accordingly, an object of the present invention is to form the cylinder portion of the oil gauge integrally with the housing of the hydraulic motor portion, to dispose the oil gauge near the rotary portion of the motor portion, and to provide a cover for the motor portion. It is an object of the present invention to provide a hydraulic motor device with a speed reducer that can greatly improve maintenance and inspection work on lubricating oil of a speed reducer attached to a motor by adopting a configuration that supports an oil gauge.

[0010]

In order to achieve the above object, a hydraulic motor device with a speed reducer according to the present invention comprises connecting a speed reducer portion to a hydraulic motor portion and supplying hydraulic oil to the hydraulic motor portion. A hydraulic gear with a speed reducer configured to drive a drive gear of the speed reducer unit engaged with a drive shaft of a hydraulic motor unit, and to rotationally drive the drive shaft of the speed reducer unit via a speed reduction mechanism meshed with the drive gear. In the motor device, a through hole is provided on a side surface of a housing surrounding a rotary portion of the hydraulic motor unit, and one end of the through hole is opened on the upper surface of the speed reduction mechanism with respect to the speed reducer unit, and the other end is the hydraulic motor unit. An oil gauge for confirming the level of the lubricating oil of the speed reducer is inserted through the opening on the cover side into the through hole, and the oil gauge is inserted into the opening. Engagement means Through wherein the attaching.

In this case, a plurality of through holes are provided on a side surface of the housing surrounding the rotary portion of the hydraulic motor unit,
An oil gauge for confirming the level of lubricating oil in the speed reducer is inserted through one of the through holes through the opening on the cover side, and the oil gauge is inserted into the opening through an engaging means. In addition, a blind plug can be attached and closed to the opening of the other through hole on the cover side via an engaging means.

[0012] Further, an oil gauge having one end opened to the upper surface of the speed reduction mechanism with respect to the speed reducer portion and the other end opened to the upper surface of the cover of the hydraulic motor portion is inserted into the through hole. A part of the through hole that opens into the drain port of the hydraulic motor is connected to the drain port of the hydraulic motor through a connection hole, and a check valve is provided in the connection hole so as to prevent oil from flowing into the through hole. You can also.

Further, in all the through holes having one end opened to the reduction gear section on the upper surface of the speed reduction mechanism and the other end opened to the upper surface of the cover of the hydraulic motor section, the opening on the cover side is formed. Alternatively, the blind plug may be attached and closed via the engagement means without inserting the oil gauge.

On the other hand, a through hole provided in a side surface of the housing surrounding the rotary portion of the hydraulic motor portion is provided substantially in parallel with the drive shaft of the hydraulic motor portion and close to the rotary portion integrally with the housing. It can be constituted by a cylindrical hole.

Further, the engaging means provided at the openings on the cover side of the plurality of through holes may be constituted by screw coupling means of the same size.

Further, the hydraulic motor device with a speed reducer according to the present invention is most effectively applied as a swing drive device installed on a swing body of a hydraulic excavator and between two mounting walls of a boom base. Can be.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a hydraulic motor device with a speed reducer according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of a hydraulic motor device with a speed reducer according to the present invention. FIG. 1 is a schematic sectional view of the overall structure and the main parts thereof, and FIG. It is the schematic side view seen from.

In FIG. 1, the hydraulic motor device 10 with a speed reducer of the present embodiment comprises a hydraulic motor unit 12 and a speed reducer unit 14. Hydraulic motor section 12
In the case of this embodiment, a cylinder 17 is rotatably incorporated in a housing 16 which is configured as a swash plate type hydraulic motor and is integrally formed with a cover 15 of the speed reducer section 14. A plurality of pistons 18 are slidably incorporated in the piston hole 17.

In the present embodiment, the first stage sun gear 22 of the two-stage planetary gear reduction mechanism constituting the reduction gear unit 14 meshes with the tip of the drive shaft 20.

Further, a cover 24 of the hydraulic motor section 12 is attached to the hydraulic motor section 12 on the side opposite to the reduction gear section (see FIG. 2). When pressure oil is supplied via a pressure oil supply / discharge port 25 provided on the cover 24, the pressure oil is supplied to the cylinder 17 via a valve plate 26,
It flows into the piston hole of the cylinder 17.

The pressure oil is supplied to a plurality of pistons 18
Is pushed out of the piston hole along the slope of the swash plate 28, and as a reaction of this, the cylinder 17 rotates, and this rotating force drives the drive shaft 20 and the sun gear 22, and finally the output pinion of the speed reducer unit 14. 30 is configured to be driven.

In the case of this embodiment, a mechanical brake 32 is incorporated between the outer peripheral portion of the cylinder 17 and the inner peripheral portion of the housing 16.

On the outer peripheral portion of the mechanical brake 32, a cylindrical passage formed integrally with the housing 16 substantially in parallel with the drive shaft 20 near the rotary portion of the hydraulic motor unit 12 such as the cylinder 17. A hole or cylindrical hole 34 is provided in the housing 16.

The cylindrical hole 34 has a lower end opening in a space 35 located above the speed reducer section 14, an upper end opening in the cover 24 of the hydraulic motor section 12, and an opening in the cover 24. In FIG. 4, various engaging means 36 such as a threaded portion as shown in FIG. 4 or press-fitting using an O-ring or a resilient tubular portion (not shown) are formed. An oil gauge 38 is attached to the housing and fixed.

The space 35 extends upward to the vicinity of the mechanical brake 32. The hydraulic motor device 10 having a turning speed reducer is used for a hydraulic shovel or the like, and the hydraulic shovel is located on an inclined ground. Even when the oil level of the lubricating oil in the reduction gear unit 14 is located above the space 35, the lubricating oil is configured not to block the cylindrical hole 34.

With the above-described configuration, the outer peripheral portion of the hydraulic motor portion 12 has no obstruction portion in the case of performing piping between hydraulic devices as in the related art. The opening (engaging means 36) of the cylindrical hole (gauge hole) 34 of the cover 24 located at the uppermost part of the hydraulic motor device 10 with a turning speed reducer is used as the oil supply port. By doing so, piping, maintenance management, and the like can be significantly improved as compared with the related art.

FIGS. 3 and 4 show a modification of the hydraulic motor device 10 with a speed reducer shown in FIG. That is, in the present embodiment, in the portion where the upper part of the cylindrical hole 34 shown in FIG.
The connection hole 42 for connecting to the passage of the drain port 40 provided in the cover 24 is provided in the cover 24, and the check valve 43 is provided in such a direction as to allow only the flow from the cylindrical hole 34 to the drain port 40 side. As a result, even if the temperature inside the speed reducer unit 14 rises and the pressure in the upper space of the speed reducer unit 14 rises, this can be discharged to the drain port 40 side of the hydraulic motor unit 12, so that the hydraulic motor The cylindrical hole (gauge hole) in the cover 24 of the portion 12
The shape of the opening of 34 eliminates the need for an air vent structure to the outside of the reduction gear unit 14. As a result, the structure of the mounting portion of the oil gauge 38 is simplified, and the seal can be surely sealed by the seal member 44. Therefore, during the use of the hydraulic motor device 10 with the speed reducer,
It is possible to eliminate the danger of water infiltration into the inside (Fig. 4
reference).

FIG. 5 shows a modification of the embodiment shown in FIG. That is, in this embodiment, the oil gauge 38 inserted through the cylindrical hole 34 in FIG. 3 is removed, and the blind plug 45 is attached to the engaging means 36 formed at the opening of the cylindrical hole (gauge hole) 34. Thus, the opening is closed, and the lubricating oil in the reduction gear unit 14 is periodically replaced. In this case, the use of the blind plug 45 as an oil supply port and the use of the oil drain hole 46 provided in a part of the speed reducer section 14 allow smooth replacement of the lubricating oil.

Further, in the present invention, it is possible to adopt a configuration in which the aforementioned cylindrical hole 34 is provided at a plurality of positions instead of one. That is, although illustration is omitted, FIG.
Can be provided at a plurality of positions. In this case, any one of the cylindrical holes 34 can be selected and the oil gauge 38 can be attached. A blind plug 45 is attached to the other cylindrical hole 34 at the opening on the cover 24 side of the hydraulic motor unit 12 via the engaging means 36 in the same manner as described above, and the opening is closed. You can do it.

By providing a plurality of cylindrical holes 34, the cover 2 without the oil gauge 38 is provided.
The opening on the fourth side functions as an air vent hole different from the oil supply port when oil is supplied to the speed reducer section 14, so that the oiling operation can be smoothly performed. When the hydraulic motor device 10 configured as described above is applied as a turning drive device of a hydraulic excavator, depending on the positional relationship with other hydraulic devices, for example, valves, cylinders, and the like, in order to prevent interference with piping. The mounting position of the oil gauge 38 can be freely selected from a plurality of cylindrical holes 34 and used at an appropriate position.

When a plurality of cylindrical holes 34 are provided, the engaging means 36 provided at the opening on the cover 24 side of the hydraulic motor unit 12 for mounting the oil gauge 38 and the blind plug 45 is, for example, of the same size. The function of expanding the degree of freedom of the selection described above can be more effectively exerted by using the screw coupling means for common use.

As is apparent from the above-described embodiment, according to the hydraulic motor device with a speed reducer according to the present invention, the cylindrical hole is integrated with the housing of the hydraulic motor portion as an oil detection hole for the lubricating oil of the speed reducer portion. By providing the cylinder hole in the cover of the hydraulic motor part, it is possible to use it as a refueling port at a high position by providing the cylinder hole easily and in close proximity to the drive shaft. It is possible to obtain an advantage that work such as maintenance management becomes easy.

Therefore, for example, on a revolving structure of a hydraulic excavator, an engine, a pump, a valve, a center joint, a boom cylinder and the like are arranged in a very narrow space, and the pipes connecting these are also diversified. A large number of pipes also intersect around the turning drive device installed between them. Therefore, when the hydraulic motor device with a speed reducer of the present invention having the above configuration is used as a turning drive device of the hydraulic shovel, all the above-described effects can be effectively exerted.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and many design changes can be made without departing from the spirit of the present invention.

[0036]

As described above, in the hydraulic motor device with a speed reducer according to the present invention, the speed reducer is connected to the hydraulic motor and the hydraulic oil is supplied to the hydraulic motor so that the drive shaft of the hydraulic motor is driven. In the hydraulic motor device with a speed reducer configured to drive the speed reduction mechanism of the speed reducer portion engaged with the through hole, a through hole is provided on a side surface of a housing surrounding a rotary portion of the hydraulic motor portion, and one end of the through hole is provided. The lubricating oil of the speed reducer unit is opened through the upper surface of the cover of the hydraulic motor unit at the other end while opening at the upper surface of the speed reducer unit with respect to the speed reducer unit and through the opening on the cover side in the through hole. An oil gauge for confirming the level of the cylinder is inserted and arranged, and the oil gauge is attached to the opening via an engaging means, so that the cylinder serves as an oil inspection hole for lubricating oil in a reduction gear unit. Hydraulic holes The pipe work is facilitated by being provided integrally with the housing of the motor part and close to the drive shaft, and the cylindrical hole is provided so as to be opened in the cover of the hydraulic motor part, so that it can be installed at a high position. Many excellent advantages can be obtained, such as being able to be used as a fuel filler and facilitating operations such as maintenance management.

[Brief description of the drawings]

FIG. 1 is an overall configuration showing an embodiment of a hydraulic motor device with a reduction gear according to the present invention and a schematic cross-sectional view of main parts thereof.

FIG. 2 is a schematic side view of the hydraulic motor device with a speed reducer shown in FIG. 1 as viewed from a Z direction.

3 is an overall configuration and a schematic cross-sectional view of a main part of a modified example of the hydraulic motor device with a speed reducer shown in FIG.

FIG. 4 is an enlarged sectional view of a main part of an oil gauge mounting portion in the hydraulic motor device with a speed reducer shown in FIG.

5 is an overall configuration and a schematic cross-sectional view of a main part showing a modified example of the hydraulic motor device with a speed reducer shown in FIG. 3;

FIG. 6 is an overall configuration of a conventional hydraulic motor device with a speed reducer and a schematic cross-sectional view of main parts thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hydraulic motor apparatus with reduction gear 12 Hydraulic motor part 14 Reduction gear part 15 Cover (of reduction gear part) 16 Housing 17 Cylinder 18 Piston 20 Drive shaft 22 Sun gear 24 Cover (of hydraulic motor part) 25 Supply / discharge port 26 Valve plate 28 Swash plate 30 Output pinion 32 Mechanical brake 34 Cylindrical hole (through hole) 35 Space 36 Engagement means 38 Oil gauge 40 Drain port 42 Connection hole 43 Check valve 44 Seal member 45 Blind tap 46 Oil drain hole

Claims (7)

[Claims] 1. A reduction gear unit is coupled to a hydraulic motor unit, and pressure oil is supplied to the hydraulic motor unit to drive a reduction mechanism of the reduction gear unit engaged with a drive shaft of the hydraulic motor unit. In a hydraulic motor device with a speed reducer, a through hole is provided in a side surface of a housing surrounding a rotary portion of the hydraulic motor portion, and one end of the through hole is opened to the upper surface of the speed reduction mechanism with respect to the speed reducer portion, and the other end is opened. Is opened on the upper surface of the cover of the hydraulic motor unit, and an oil gauge for confirming the level of the lubricating oil of the reduction gear unit is inserted through the opening of the cover through the opening on the cover side. Is attached to the opening via an engagement means. 2. A plurality of through holes are provided in a side surface of a housing surrounding a rotary portion of a hydraulic motor unit, and one of the through holes is provided.
An oil gauge for confirming the level of the lubricating oil in the speed reducer through the opening on the cover side, and attaching the oil gauge to the opening via an engaging means, 2. The hydraulic motor device with a speed reducer according to claim 1, wherein a blind plug is attached and closed to the opening of the other through hole on the cover side via an engaging means. 3. A through hole in which an oil gauge having one end opened to the upper surface of the speed reduction mechanism relative to the speed reducer portion and the other end opened to the upper surface of the cover of the hydraulic motor portion is inserted through the cover side. A part of the through hole opening to the hydraulic motor is connected to a drain port of the hydraulic motor through a connection hole, and a check valve is provided in the connection hole so as to prevent oil from flowing into the through hole. 3. The hydraulic motor device with a reduction gear according to 1 or 2. 4. An opening on the cover side in all through-holes having one end opening on the upper surface of the speed reduction mechanism with respect to the reduction gear unit and the other end opening on the upper surface of the cover of the hydraulic motor unit. The hydraulic motor device with a speed reducer according to claim 1 or 2, wherein the blind plug is attached and closed via the engagement means without inserting the oil gauge. 5. A through hole provided in a side surface of a housing surrounding a rotary portion of the hydraulic motor portion is provided integrally with the housing substantially parallel to a drive shaft of the hydraulic motor portion and close to the rotary portion. 2. A cylinder comprising a cylindrical hole.
5. The hydraulic motor device with a speed reducer according to any one of items 4 to 4. 6. The hydraulic motor device with a speed reducer according to claim 2, wherein the engagement means provided at each of the openings on the cover side of the plurality of through holes is formed by screw coupling means of the same size. 7. The hydraulic motor device with a speed reducer is a swivel drive device installed on a swing body of a hydraulic excavator and between two mounting walls of a boom base.
The hydraulic motor device with a speed reducer according to any one of the above.