KR20120028252A - Hydraulic motor - Google Patents

Abstract

PURPOSE: A hydraulic motor is provided to keep drain oil in a motor housing of an opposite member in a state of eliminating the motor housing. CONSTITUTION: A hydraulic motor comprises a motor housing(32), a hydraulic motor shaft(34), a rotating unit(36), and an oil seal(37). A passage(38) is installed in the motor housing and makes drain oil in the motor housing flow into an opposite member. When the motor housing is installed in the opposite member, the passages open. When the motor housing is eliminated from the opposite member, a passage switch device(39) for closing the passage is installed. The opposite member is installed in the lower part of the motor housing and connected with the hydraulic motor shaft. An electric motor includes an electric motor shaft(27) rotating with the hydraulic motor by supplying power.

Description

Hydraulic Motor {HYDRAULIC MOTOR}

TECHNICAL FIELD This invention relates to the hydraulic motor used suitably for the turning device of construction machines, such as a hydraulic excavator and a hydraulic crane, for example.

In general, a hydraulic excavator as a representative example of a construction machine includes a lower traveling body that can be frequently used, an upper swinging body that is pivotally mounted on the lower traveling body through a turning wheel, and a work device provided on the front side of the upper swinging body. It is roughly comprised by. Then, a swing device is provided between the lower travel body and the upper swing body, and the upper swing body swings on the lower travel body by operating the swing device.

Here, the swinging device is usually a speed reducer mounted on the upper swinging body to decelerate and output the input rotation, a swinging motor mounted above the speed reducer and inputting rotation of the motor shaft to the speed reducer, and rotation of the motor shaft reduced by the speed reducer. The output shaft which outputs to a turning wheel is comprised. The swing motor constituting the swing device includes a hydraulic motor for rotating the hydraulic motor shaft by supplying hydraulic oil, an electric motor for rotating the electric motor shaft by supplying electric power, and a hybrid type in which these hydraulic motors and the electric motor are combined. Slewing motors are known.

By the way, in the turning device which used a hydraulic motor as a turning motor, and installed this hydraulic motor on the upper side of a reducer, it is known that it was set as the structure which lubricates a reducer using the drain oil which is an excess of the hydraulic oil supplied to the hydraulic motor. (See, for example, Patent Document 1).

The swing device according to the prior art has a configuration in which a hydraulic motor housing is provided above the reduction gear housing, and the lower end side of the hydraulic motor shaft protruding from the hydraulic motor housing is connected to a planetary gear reduction mechanism housed in the reduction gear housing. In this case, a bearing for rotatably supporting the hydraulic motor shaft is provided between the hydraulic motor housing and the hydraulic motor shaft, and drain oil in the hydraulic motor housing is discharged through a gap between the inner and outer rings of the bearing. It is supplied in the reducer housing. For this reason, the planetary gear deceleration mechanism etc. can always be appropriately lubricated using the drain oil from a hydraulic motor.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-116408

However, in the above-described prior art, the drain oil in the hydraulic motor housing flows downward (decelerator side) through a gap formed between the inner and outer rings of the bearing. Thus, for example, when the hydraulic motor is removed from the reducer in order to maintain the hydraulic motor, and the hydraulic motor is transported to a repair shop or the like, drain oil in the hydraulic motor housing is formed between the inner and outer rings of the bearing. It leaks out through the gap. As a result, there is a problem that the periphery of the hydraulic motor is contaminated by the drain oil leaked from the hydraulic motor housing, and the workability of maintenance for the hydraulic motor is lowered.

This invention is made | formed in view of the above-mentioned problem of the prior art, In the state which installed the motor housing in the counterpart member, it can lubricate the counterpart member using drain oil, and removes the motor housing from the counterpart member. In the state, it is an object to provide a hydraulic motor which makes it possible to hold drain oil in a motor housing.

MEANS TO SOLVE THE PROBLEM In order to solve the above-mentioned subject, this invention provides the motor housing provided in the upper side of the counterpart member, the hydraulic motor shaft which the lower end side protrudes from the said motor housing, and is connected to the said counterpart member, and is located in the said motor housing, A hydraulic mechanism provided on a motor shaft and provided with a rotating mechanism for rotating the hydraulic motor shaft by supplying hydraulic oil, and an oil seal provided between the motor housing and the hydraulic motor shaft to seal the drain oil in the motor housing against the outside. Applies to the motor.

A characteristic feature of the configuration employed in the invention of claim 1 is that the motor housing has a flow passage for draining the drain oil in the motor housing toward the counterpart member, and the motor housing is provided with the counterpart member. When the flow path is opened and the motor housing is removed from the counterpart member, flow path opening and closing means for closing the flow path is provided.

The invention of claim 2, wherein the counterpart member is installed under the motor housing and is connected to the hydraulic motor shaft, and is provided by an electric motor having an electric motor shaft that rotates integrally with the hydraulic motor shaft by supplying electric power. And the flow path opening / closing means opens the flow path when the motor housing is provided above the electric motor so that drain oil in the motor housing is supplied to the connection portion between the motor shaft and the electric motor shaft through the flow path. It is in one thing.

The invention according to claim 3, wherein the counterpart member is constituted by a speed reducer provided at a lower side of the motor housing and connected to the hydraulic motor shaft to reduce the rotation of the hydraulic motor shaft. The flow path opening and closing means opens the flow path when the motor housing is installed in the gas housing, so that drain oil in the motor housing is supplied to the deceleration mechanism of the speed reducer through the flow path.

The invention according to claim 4, wherein the flow path opening and closing means is inserted into the flow path so as to move upward and downward and has a stopper provided with a stopper contacting the motor housing at the upper end side, and a weight member provided at the lower end side of the shaft body. And a communication path provided in the axial direction of the shaft body and communicating with the inside and the outside of the motor housing when the stopper is lifted upward from the motor housing, and when the motor housing is removed from the counterpart member. When the stopper is brought into contact with the motor housing by the weight member, and the motor housing is installed on the counterpart member, the weight member is fitted to the counterpart member to lift the stopper upward from the motor housing. have.

The invention according to claim 5, wherein the flow path opening and closing means is provided in the motor housing and moves between a valve opening position for opening the flow path and a valve closing position for closing the flow path, and the flow path among the other members. When the motor housing is removed from the counterpart member, the valve member moves to the valve closed position by its own weight, and the motor housing is installed on the counterpart member. In this case, the protrusion member lifts the valve member upward and moves the valve member from the valve closing position to the valve opening position.

The invention according to claim 6, wherein the flow path opening and closing means opens the flow path by removing the motor housing from the flow path when the motor housing is installed on the counterpart member, and fits the flow path when the motor housing is removed from the counterpart member. It is comprised by the sealing stopper which closes the said flow path.

According to the invention of claim 1, in the state where the motor housing is provided above the counterpart member, the channel opening / closing means opens the channel so that the drain oil in the motor housing can flow down to the counterpart member side through the channel. As a result, the partner member can always be appropriately lubricated using the drain oil from the motor housing.

On the other hand, in order to carry out maintenance work, for example, in the state where the motor housing is removed from the counterpart member, the oil passage opening / closing means closes the oil passage so that the drain oil can be held in the motor housing. As a result, it is possible to reliably prevent the drain oil from leaking to the outside through the flow path during transportation of the hydraulic motor, and to avoid the contamination of the surroundings by the drain oil leaked from the motor housing, thereby improving the workability of maintenance work. Can be.

According to the invention of claim 2, when the motor housing is provided on the upper side of the electric motor, the flow path opening and closing means opens the flow path so that the drain oil in the motor housing flows down to the electric motor side through the flow path. For this reason, the drain oil from a motor housing can be supplied to the connection part of a motor shaft and an electric motor shaft through a flow path, and it can always lubricate the connection part suitably. On the other hand, in the state where the motor housing is removed from the electric motor, the oil passage opening / closing means closes the passage so that the drain oil can be held in the motor housing. Therefore, it is possible to prevent the drain oil from leaking to the outside through the flow path, thereby improving the workability of the maintenance work.

According to the invention of claim 3, when the motor housing is provided above the speed reducer, the flow path opening and closing means opens the flow path so that the drain oil in the motor housing flows down to the speed reducer side through the flow path. For this reason, drain oil from a motor housing can be supplied to a speed reduction mechanism through a flow path, and the said speed reduction mechanism can always be appropriately lubricated. On the other hand, when the motor housing is removed from the reducer, the flow path opening and closing means closes the flow path so that drain oil can be retained in the motor housing, thereby preventing drain oil from leaking to the outside through the flow path, thereby improving workability of maintenance work. Can be.

According to the invention of claim 4, when the motor housing is provided on the counterpart member, the weight member is fitted to the counterpart member and the shaft body moves upward, whereby the stopper is lifted upward from the motor housing to open the communication path. As a result, the flow path can be automatically opened through the communication path, and the drain oil in the motor housing can be supplied to the counterpart member. On the other hand, when the motor housing is removed from the counterpart member, the shaft body moves downward by the weight member, so that the stopper contacts the motor housing and the communication path is blocked. As a result, the flow path can be closed automatically, and drain oil can be maintained in the motor housing.

According to the invention of claim 5, when the motor housing is installed on the counterpart member, the valve member is lifted up by the protrusion member and moved to the valve open position, so that the flow path can be automatically opened to drain oil in the motor housing to the counterpart member. Can supply On the other hand, when the motor housing is removed from the counterpart member, the valve member moves to the valve closing position due to its own weight, so that the flow path can be automatically closed and the drain oil can be maintained in the motor housing.

According to the invention of claim 6, when the motor housing is installed on the counterpart member, the operator can open the flow path only by removing the sealing plug from the flow path, so that the counterpart member can be lubricated using the drain oil. On the other hand, when the motor housing is removed from the counterpart member, the operator can close the flow path simply by fitting a sealing stopper in the flow path, so that the drain oil can be held in the motor housing.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the hydraulic excavator provided with the turning device to which the hydraulic motor which concerns on 1st Embodiment of this invention was applied.
It is sectional drawing which shows the turning device to which the hydraulic motor which concerns on 1st Embodiment was applied.
FIG. 3 is a cross-sectional view showing main parts of the electric motor housing, the electric motor shaft, the hydraulic motor housing, the hydraulic motor shaft, the flow path opening and closing means and the like in FIG. 2.
4 is an enlarged cross-sectional view showing an enlarged flow path, a flow path opening and closing means, and the like in FIG. 3.
5 is a cross-sectional view of the flow path and the flow path opening and closing means as seen from the arrow VV direction in FIG. 4.
FIG. 6 is an enlarged cross-sectional view similar to FIG. 4 showing a state in which the flow path opening and closing means closes the flow path when the hydraulic motor is removed from the electric motor.
It is sectional drawing similar to FIG. 3 which shows the principal part of the hydraulic motor which concerns on 2nd Embodiment.
FIG. 8 is an enlarged cross-sectional view showing an enlarged flow path, a flow path opening and closing means and the like in FIG. 7.
9 is an enlarged cross-sectional view similar to FIG. 8 showing a state in which the flow path opening and closing means closes the flow path when the hydraulic motor is removed from the electric motor.
FIG. 10 is an enlarged cross-sectional view showing an enlarged flow path, a flow path opening and closing means, and the like of the hydraulic motor according to the third embodiment.
FIG. 11 is an enlarged cross-sectional view similar to FIG. 10 showing a state in which the flow path opening and closing means closes the flow path when the hydraulic motor is removed from the electric motor.
It is sectional drawing which shows the flow path, flow path opening / closing means, etc. of the hydraulic motor which concerns on 4th Embodiment in the state which closed the flow path.
It is sectional drawing which shows the modification which installed the hydraulic motor in the reducer.

EMBODIMENT OF THE INVENTION Hereinafter, the case where the embodiment of the hydraulic motor which concerns on this invention is applied to the turning device of a hydraulic excavator is described in detail, referring an accompanying drawing as an example.

1 to 6 show a first embodiment of the present invention. 1 shows a hydraulic excavator which is a representative example of a construction machine, and the hydraulic excavator 1 is rotatably mounted on the crawler type lower traveling body 2 and the lower traveling body 2 which are often possible. It is comprised substantially by the upper swinging structure 3, and the working apparatus 4 is provided in the front part side of the upper swinging structure 3 so that a buoyant movement is possible. Moreover, the turning wheel 5 mentioned later is provided between the lower traveling body 2 and the upper turning body 3, The upper turning body 3 is provided on the lower traveling body 2 via the turning wheel 5 It is supported so that it can turn around.

5 represents a turning wheel provided between the lower traveling body 2 and the upper swinging body 3, and the turning wheel 5 is placed on the circumference 2A of the lower traveling body 2 shown in FIG. 5 A of fixed inner rings, the outer ring 5B fixed to the lower surface side of the revolving frame 3A which becomes the base of the upper revolving body 3, and the many between the inner ring 5A and the outer ring 5B. It consists of steel balls 5C (only one is shown), and internal gear 5D is formed in the inner peripheral side of 5A of inner rings over the perimeter. Then, the turning device 11 described later operates to rotate the outer ring 5B fixed to the swing frame 3A around the inner ring 5A, so that the upper swing body 3 swings on the lower traveling body 2. It is a structure which performs an operation.

11 represents a turning device, and the turning device 11 pivots the upper swinging body 3 supported on the lower traveling body 2 via the turning wheel 5. Here, the turning device 11 is comprised by the reducer 12, the output shaft 18, the electric motor 23, the hydraulic motor 31, etc. which are mentioned later, and the electric motor 23 and the hydraulic motor 31 cooperate with each other. It is comprised as what is called a hybrid type swing device which drives the output shaft 18. FIG.

12 is a speed reducer provided on the swing frame 3A of the upper swing body 3 in a state extending in the up and down direction, and the speed reducer 12 is obtained from the electric motor 23 and the hydraulic motor 31 described later. The input rotation input is decelerated and output to the output shaft 18. Here, the reduction gear 12 is substantially comprised by the reduction gear housing 13 mentioned later, the planetary gear reduction mechanism 16 of a 1st stage, and the planetary gear reduction mechanism 17 of a 2nd stage.

13 is a speed reducer housing forming an outer angle of the reducer 12, and the speed reducer housing 13 includes a cylindrical lower housing 14 provided on the upper surface side of the swing frame 3A, and an upper end of the lower housing 14. It consists of the cylindrical upper housing 15 provided in the side, and extends upwards (upward and downward direction) from the upper surface of 3 A of turning frames.

Here, the lower flange part 14A of a large diameter is provided in the lower end part side of the lower housing 14, and the said lower flange part 14A is bolted to the revolving frame 3A. In addition, an annular intermediate flange portion 14B having a diameter smaller than that of the lower flange portion 14A is provided on the upper end side of the lower housing 14.

On the other hand, 15 A of annular intermediate flange parts are provided in the lower end part side of the upper housing 15, and the said intermediate flange part 15A is bolted to the intermediate flange part 14B of the lower housing 14. . Moreover, the upper flange part 15B is provided in the upper end part side of the upper housing 15, and the electric motor 23 mentioned later is provided in the said upper flange part 15B. In addition, two inner gears 15C and 15D are formed on the inner circumferential side of the upper housing 15 so as to be spaced apart in the up and down directions over the entire circumference, respectively.

16 is a first planetary gear reduction mechanism disposed in the upper housing 15 of the reduction gear housing 13, and the planetary gear reduction mechanism 16 is a sun gear splined to an electric motor shaft 27 to be described later ( 16A), a plurality of planetary gears 16B (only one shown) engaged with the sun gear 16A and the inner gear 15C of the upper housing 15 and rotating while rotating around the sun gear 16A; And 16 C of carriers which rotatably support each said planetary gear 16B.

17 is a 2nd stage (final stage) planetary gear reduction mechanism arrange | positioned under the planetary gear reduction mechanism 16, The said planetary gear reduction mechanism 17 is a carrier of the planetary gear reduction mechanism 16 of the 1st stage. A plurality of planetary gears that are in rotation while rotating around the sun gear 17A by meshing with the sun gear 17A splined to 16C and the sun gear 17A and the internal gear 15D of the upper housing 15. It consists of 17B and the carrier 17C which supports each said planetary gear 17B so that rotation is possible. The carrier 17C of the planetary gear reduction mechanism 17 is configured to be splined to the upper end side of the output shaft 18 described later.

18 is an output shaft rotatably installed in the reduction gear housing 13, and the output shaft 18 is rotatably supported in the lower housing 14 through the upper bearing 19 and the lower bearing 20, and the reduction gear housing ( 13) extends in the up and down direction. Here, a male spline portion 18A is formed on the upper end side of the output shaft 18, and the male spline portion 18A is splined to the carrier 17C of the planetary gear reduction mechanism 17 of the second stage. On the other hand, the pinion 18B is integrally provided in the lower end part side of the output shaft 18, and the pinion 18B protrudes downward from the lower end part of the lower housing 14, and to the inner ring 5A of the turning wheel 5 It meshes with the installed internal gear 5D.

Therefore, rotation of the electric motor shaft 27 mentioned later is transmitted to the output shaft 18 in the state decelerated by the planetary gear reduction mechanisms 16 and 17 by 2 steps, and the output shaft 18 has a large rotational force (torque). Rotate at low speed. For this reason, the pinion 18B of the output shaft 18 revolves along the inner ring 5A, meshing with the internal gear 5D of the turning wheel 5, and the air power of the pinion 18B is reduced in the reducer housing 13. The upper swinging structure 3 shown in FIG. 1 performs a swinging operation on the lower traveling body 2 by being transmitted to the swinging frame 3A through the bottom.

21 is a disk-shaped sleeve fitted to the lower end side of the output shaft 18, and the sleeve 21 is disposed between the pinion 18B and the lower bearing 20 to rotate integrally with the output shaft 18. Further, an annular oil seal 22 is provided between the inner circumferential surface on the lower end side of the lower housing 14 and the outer circumferential surface of the sleeve 21, and the oil seal 22 lubricates the reduction gear housing 13. Is maintained.

Next, 23 represents an electric motor, and a hydraulic motor 31 to be described later is provided on the upper side of the electric motor 23, and these electric motors 23 and the hydraulic motor 31 cooperate to cooperate with the output shaft 18. As shown in FIG. It is configured to rotate. That is, the electric motor 23 comprises the counterpart member of the hydraulic motor 31 which concerns on this embodiment.

Here, the electric motor 23 includes an electric motor housing 24 provided in the upper housing 15 of the reducer 12, a stator 25 fixedly installed in the electric motor housing 24, and the stator ( It is comprised by the rotor 26 rotatably provided in the inner peripheral side of 25, and the electric motor shaft 27 mentioned later.

In this case, the electric motor housing 24 includes a cylindrical portion 24A in which both end portions in the up and down directions are opened, a plate-shaped lid portion 24B covering the upper end side of the cylindrical portion 24A, and a cylinder. It is comprised by 24 C of lower flange parts provided annularly at the lower end part side of the part 24A. The lower flange portion 24C is bolted to the upper flange portion 15B of the reducer 12 (upper housing 15). Moreover, the lower flange part 32J of the hydraulic motor 31 mentioned later is provided in the outer peripheral side of the cover part 24B.

24D is a shaft insertion through-hole provided in the center part of the cover part 24B, The upper end side of the electric motor shaft 27 mentioned later penetrates through the said shaft insertion hole 24D. Here, the bearing installation step part 24E in which the bearing 28 mentioned later is provided, and the seal installation step part 24F in which the oil seal 29 mentioned later are provided in the inner peripheral side of the shaft insertion hole 24D are provided up and down. It is installed spaced apart.

27 represents an electric motor shaft which rotates integrally with the rotor 26, and the electric motor shaft 27 is rotatable to the electric motor housing 24 in a state in which an intermediate portion in the axial direction is fixed to the rotor 26. It is supported so as to extend in the up and down directions at the center of the electric motor housing 24. Here, the male spline part (shaft spline part) 27A is formed in the lower end part side of the electric motor shaft 27 over the whole circumference, and the said male spline part 27A is from the lower end part side of the electric motor housing 24. As shown in FIG. It protrudes into the reduction gear housing 13, and it is set as the structure which spline-couples to 16 A of 1st gears.

In addition, the upper end side of the electric motor shaft 27 penetrates through the shaft insertion hole 24D provided in the cover part 24B of the electric motor housing 24, and is mentioned later provided in the bearing installation step part 24E. It is rotatably supported by the bearing 28. And the female spline part (hole spline part) 27B which consists of a bottomed hole is formed in the upper end part of the electric motor shaft 27, and the said female spline part 27B is the hydraulic motor shaft 27 mentioned later. Is splined to the male spline portion 27A.

28 is a bearing provided between the shaft insertion hole 24D of the electric motor housing 24 and the upper end side of the electric motor shaft 27, and the said bearing 28 is an electric motor provided with the female spline part 27B. By arrange | positioning at the upper end side of the shaft 27, it is rotatably supporting the connection part of the electric motor shaft 27 and the hydraulic motor shaft 34 mentioned later.

29 denotes an oil seal provided between the shaft insertion hole 24D of the electric motor housing 24 and the electric motor shaft 27, wherein the oil seal 29 is located above the bearing 28 and is disposed on the shaft. It is provided over the perimeter between the seal | sticker installation step part 24F of the insertion hole 24D, and the outer peripheral surface of the electric motor shaft 27. As shown in FIG. And the oil seal 29 resists the pressure of the drain oil which flows down from the hydraulic motor 31 mentioned later, and connects between the shaft insertion through-hole 24D of the electric motor housing 24, and the electric motor shaft 27. FIG. The liquid is sealed to prevent leakage.

Next, 31 shows the hydraulic motor by this embodiment. The said hydraulic motor 31 is arrange | positioned above the electric motor 23 as a counterpart member, and rotates and drives the output shaft 18 in cooperation with the said electric motor 23. As shown in FIG. Here, the hydraulic motor 31 consists of an inclination plate type hydraulic motor, for example, the hydraulic motor housing 32 mentioned later, the hydraulic motor shaft 34, the rotating mechanism 36, and the oil seal 37 And the flow path 38 and the flow path opening and closing means 39 are substantially constituted.

32 is a hydraulic motor housing forming an outer angle of the hydraulic motor 31, wherein the hydraulic motor housing 32 extends in the up and down directions to open the upper end side, and has a bottomed cylindrical shape having the lower end side at the bottom. It is comprised by the housing main body 32A and the cover 32B which covers the upper end side of the said housing main body 32A, The inner peripheral side of the housing main body 32A accommodates the rotating mechanism 36 which accommodates the rotating mechanism 36 mentioned later. It is set to 32C.

Here, in the bottom part 32D formed in the lower end part side of the housing main body 32A, the bearing installation which the shaft insertion through-hole 32E through which the hydraulic motor shaft 34 mentioned later penetrates and the bearing 35 mentioned later are provided is provided. The stepped part 32F, the seal installation step part 32G in which the oil seal 37 mentioned later is provided, and the inclined plate support part 32H which support the inclined plate 36D mentioned later are formed. Moreover, the lower flange part 32J which bulged in a trumpet shape toward the electric motor 23 is integrally formed in the outer peripheral side of the lower end part of 32 A of housing main bodies. Then, the lower flange portion 32J is bolted to the lid portion 24B of the electric motor housing 24, so that the hydraulic motor 31 is provided above the electric motor 23.

On the other hand, between the lower flange part 32J and the cover part 24B of the electric motor housing 24, the annular seal 33 is concentric with the shaft insertion hole 24D of the electric motor housing 24. The drain oil chamber 32K is provided between the lower flange part 32J and the cover part 24B of the electric motor housing 24. And between the rotating mechanism accommodation chamber 32C of the hydraulic motor housing 32 and the drain oil chamber 32K, it is the structure which communicates through the flow path 38 mentioned later. Further, a drain oil outlet (not shown) is provided at the lower end side of the hydraulic motor housing 32 to open the drain oil chamber 32K, and the drain oil in the drain oil chamber 32K passes from the drain oil outlet to the drain pipe. Via reflux to a working oil tank (all not shown).

34 is a hydraulic motor shaft rotatably supported in the hydraulic motor housing 32, The lower end side of the hydraulic motor shaft 34 protrudes downward through the shaft insertion through hole 32E of the hydraulic motor housing 32. The electric motor 23 is connected to the electric motor shaft 27. Here, the lower end side of the hydraulic motor shaft 34 is rotatably supported by the bearing 35 provided in the bearing installation step part 32F of the hydraulic motor housing 32, and the upper end side of the hydraulic motor shaft 34 is The cover 32B of the hydraulic motor housing 32 is rotatably supported through a bearing or the like (not shown).

The hydraulic motor shaft 34 is splined to the cylinder block 36A of the rotating mechanism 36 whose intermediate portion in the axial direction is described later, and rotates integrally with the cylinder block 36A. Moreover, 34 A of male splines (shaft spline part) are formed in the lower end part of the hydraulic motor shaft 34 which protruded from the hydraulic motor housing 32, and the said male spline part 34A is an electric motor shaft 27. As shown in FIG. Is splined to the female spline portion 27B formed at the upper end of the " In this manner, the electric motor shaft 27 of the electric motor 23 and the hydraulic motor shaft 34 of the hydraulic motor 31 are coaxially formed by spline coupling between the female spline portion 27B and the male spline portion 34A. Connected to, will always rotate integrally.

36 represents a rotating mechanism provided in the rotating mechanism accommodating chamber 32C of the hydraulic motor housing 32, and the rotating mechanism 36 rotates the hydraulic motor shaft 34 by supplying hydraulic oil. Here, the rotating mechanism 36 includes a cylinder block 36A having an inner circumferential side splined to the hydraulic motor shaft 34 and having a plurality of cylinders spaced apart in the circumferential direction and extending in the axial direction, and the cylinder block 36A. A plurality of pistons (36B) inserted reciprocally in each cylinder of the cylinder), a shoe (36C) provided to be swingable at a distal end of each of the pistons (36B), and an inclined plate support portion (32H) of the hydraulic motor housing (32). It is supported and is comprised by the inclination board 36D which has the smooth surface which each shoe 36C slides. Moreover, between the cover part 32B of the hydraulic motor housing 32 and the cylinder block 36A, the valve board which has a pair of supply-discharge port which intermittently communicates with each cylinder of the cylinder block 36A (all are not shown) Not installed).

And the rotating mechanism 36 is supplied with the hydraulic oil (working oil) in each cylinder of the cylinder block 36A through the supply / discharge port (not shown) of the valve board, and the piston 36B inserted in each cylinder is inclined board ( The piston 36B extends to the 36D side, and the shoe 36C provided on each piston 36B slides in the circumferential direction along the smooth surface while pressing the smooth surface of the inclined plate 36D, so that each piston 36B is a cylinder block. Rotate with 36A. For this reason, the hydraulic motor shaft 34 splined to the cylinder block 36A rotates integrally with the cylinder block 36A.

37 represents an oil seal provided in the seal installation step 32G of the hydraulic motor housing 32, and the oil seal 37 is located under the bearing 35, and the hydraulic motor housing 32 and the hydraulic motor shaft ( It is installed between 34). The oil seal 37 seals the drain oil remaining in the hydraulic motor housing 32 (the rotary mechanism accommodation chamber 32C) at the time of the operation of the hydraulic motor 31 to the outside.

Next, 38 represents a flow path provided in the hydraulic motor 31 according to the present embodiment. The flow path 38 penetrates the bottom portion 32D of the hydraulic motor housing 32 in the up and down direction, and the rotary mechanism accommodation chamber 32C and the drain oil chamber 32K of the hydraulic motor housing 32 are provided. It is to communicate between.

For this reason, the drain oil which stayed in the rotating mechanism accommodation chamber 32C of the hydraulic motor housing 32 flows into the drain oil chamber 32K via the flow path 38. As shown in FIG. In this case, the drain oil chamber 32K is provided with an annular seal 33 provided between the lid portion 24B of the electric motor housing 24 and the lower flange portion 32J of the hydraulic motor housing 32. It is sealed by the oil seal 29 provided between the cover part 24B of the motor 23 and the electric motor shaft 27. As shown in FIG.

For this reason, the drain oil from the hydraulic motor 31 which flowed down into the drain oil chamber 32K via the flow path 38 does not flow into the electric motor housing 24, but the electric motor shaft 27 and the hydraulic motor shaft The spline coupling portion of the male spline portion 27B formed at the upper end portion of the electric motor shaft 27 and the male spline portion 34A formed at the lower end portion of the hydraulic motor shaft 34, Always lubricate the spline joint. In addition, the excess drain oil in the drain oil chamber 32K is refluxed from the drain oil discharge port opened to the drain oil chamber 32K to a working oil tank (not shown) through the drain pipe path.

Next, 39 denotes a flow path opening and closing means for opening and closing the flow path 38. As shown in FIG. 4, the flow path opening and closing means 39 opens the flow path 38 in a state where the hydraulic motor 31 is provided above the electric motor 23, and as shown in FIG. 6. The oil passage 38 is closed in the state where the hydraulic motor 31 is removed from the electric motor 23. Here, the channel opening-closing means 39 is comprised by the shaft body 40 mentioned later, the stopper 41, the weight member 42, and the communication path 43. As shown in FIG.

40 denotes a shaft body inserted into the flow passage 38 so as to be movable in the up and down direction, and the shaft body 40 is, for example, a hollow pipe member having an outer diameter dimension slightly smaller than the inner diameter dimension of the flow passage 38. Is formed using the inner circumferential side of the axial passage 43A described later. The shaft 40 extends upward and downward in the flow path 38, and a stopper 41 described later is provided at the upper end thereof, and a weight member 42 described later is provided at the lower end thereof.

41 is a stopper provided in the upper end part of the shaft body 40, The said stopper 41 is formed in disk shape which has an outer diameter dimension larger than the inner diameter dimension of the flow path 38, and covers the upper end part of the shaft body 40. As shown in FIG. And the stopper 41 contacts the bottom part 32D of the hydraulic motor housing 32, as shown in FIG. 6, sets the lower limit position of the shaft body 40, and closes the flow path 38 at this time. .

42 is a weight member provided at the lower end of the shaft body 40, and the weight member 42 is formed in the thick disk shape (cylindrical shape) which has an outer diameter dimension larger than the inner diameter dimension of the flow path 38, and the shaft body 40 Covering the lower end of the. And as shown in FIG. 6, in the state which removed the hydraulic motor housing 32 from the electric motor housing 24, as shown in FIG. 6, the weight member 42 lowers the shaft body 40 by the own weight (electric motor housing ( 24) side, and makes the stopper 41 contact the bottom part 32D of the hydraulic motor housing 32. As shown in FIG.

On the other hand, as shown in FIG. 4, the weight member 42 fits the lid portion 24B of the electric motor housing 24 in a state where the hydraulic motor housing 32 is installed in the electric motor housing 24. This moves the shaft 40 upward (hydraulic motor housing 32 side), and raises the stopper 41 upward from the bottom part 32D of the hydraulic motor housing 32. As shown in FIG.

43 denotes a communication path provided in the axial direction of the shaft 40, and the communication path 43 is a hydraulic motor when the stopper 41 is lifted upward from the bottom 32D of the hydraulic motor housing 32. This is to communicate between the rotary mechanism accommodation chamber 32C of the housing 32 and the drain oil chamber 32K (see FIG. 4). Here, the communication path 43 is constituted by the inner circumferential side of the shaft body 40 made of a pipe material, and has an axial passage 43A extending in the axial direction between the stopper 41 and the weight member 42. And a plurality of upper radial passages 43B disposed in the vicinity of the stopper 41 and extending in the radial direction from the outer circumferential surface of the shaft body 40 and open to the upper end side of the axial passage 43A, and the weight member 42. It is comprised by the some lower radial path 43C arrange | positioned in the vicinity of and extending in the radial direction from the outer peripheral surface of the shaft 40, and opening to the lower end side of 43 A of axial paths.

Therefore, as shown in FIG. 4, in the state where the hydraulic motor housing 32 is provided above the electric motor housing 24, the weight member 42 is attached to the cover portion 24B of the electric motor housing 24. By being fused, the shaft 40 moves upwards and the stopper 41 is lifted upwards from the bottom part 32D of the hydraulic motor housing 32. For this reason, the upper radial path 43B of the communication path 43 moves into 32 C of rotation mechanism accommodation chambers of the hydraulic motor housing 32, and the said upper radial path 43B and 43 A of axial paths The lower radial passage 43C communicates between the rotary mechanism accommodation chamber 32C and the drain oil chamber 32K. Thus, the flow path 38 opens through the communication path 43, and the drain oil in the rotating mechanism accommodation chamber 32C can flow down into the drain oil chamber 32K.

On the other hand, as shown in FIG. 6, in the state where the hydraulic motor housing 32 is removed from the electric motor housing 24, the shaft 40 is pulled downward by the weight of the weight member 42, whereby the stopper ( 41 contacts the bottom 32D of the hydraulic motor housing 32. For this reason, the flow path 38 is blocked by the stopper 41, and it is set as the structure which can hold | maintain drain oil in 32 C of rotary mechanism accommodation chambers.

The hydraulic motor 31 which concerns on this embodiment has the structure as mentioned above, and below, operation | movement of the hybrid-type swinging apparatus 11 provided with the said hydraulic motor 31 is demonstrated.

First, electric power is supplied to the electric motor 23 and hydraulic oil is supplied to the hydraulic motor 31, so that the electric motor shaft 27 and the hydraulic motor shaft 34 are distributed by the controller (not shown). Rotate simultaneously on the basis of In this case, since the electric motor shaft 27 and the hydraulic motor shaft 34 are coaxially connected to each other, the rotational force of the electric motor shaft 27 by the electric motor 23 and the hydraulic pressure by the hydraulic motor 31 are connected. It is transmitted from the electric motor shaft 27 to the reducer 12 in the state which the rotational force of the motor shaft 34 summed.

Then, the rotation of the electric motor shaft 27 in which the rotational force of the hydraulic motor shaft 34 is added is reduced by two stages by the planetary gear reduction mechanisms 16 and 17 of the reducer 12 and transmitted to the output shaft 18. , Pinion 18B rotates with a large torque (torque). Then, the pinion 18B revolves along the inner ring 5A while being engaged with the internal gear 5D provided on the inner ring 5A of the turning wheel 5, and the air power of the pinion 18B is reduced in the reducer housing 13. The upper swing structure 3 swings on the lower traveling body 2 by being transmitted to the swing frame 3A through the cross-section.

Here, when the hydraulic motor 31 is provided above the electric motor 23 which comprises the hybrid-type turning device 11, as shown in FIG. 4, the weight member 42 of the flow path opening-closing means 39 is shown. ) Is joined to the lid portion 24B of the electric motor housing 24, the shaft 40 moves upward, and the stopper 41 is lifted upward from the bottom portion 32D of the hydraulic motor housing 32.

For this reason, the drain oil which stayed in the rotation mechanism accommodation chamber 32C of the hydraulic motor 31 (hydraulic motor housing 32) at the time of the operation | movement of the turning device 11 is the communication path 43 of the shaft body 40. The female type flows down into the drain oil chamber 32K through the flow path 38 opened through), and is formed at the upper end of the connection portion of the electric motor shaft 27 and the hydraulic motor shaft 34, that is, the upper end of the electric motor shaft 27. The spline coupling portion 27B and the spline coupling portion of the male spline portion 34A formed at the lower end of the hydraulic motor shaft 34 are supplied to lubricate the spline coupling portion. In addition, surplus drain oil in the drain oil chamber 32K is refluxed from the drain oil discharge port opened to the drain oil chamber 32K to the hydraulic oil tank (all not shown) through the drain conduit.

As described above, according to the present embodiment, by providing the oil passage 38 in the hydraulic motor housing 32, the female spline portion 27B of the electric motor shaft 27 is made using drain oil from the hydraulic motor 31. And the spline coupling part of the male spline part 34A of the hydraulic motor shaft 34 can be appropriately lubricated at all times, and the reliability of the turning device 11 can be improved.

On the other hand, when the hydraulic motor 31 is removed from the electric motor 23 in order to perform maintenance of the hydraulic motor 31, for example, as shown in FIG. 6, the weight of the weight member 42 As the shaft body 40 is pulled downward by this, the stopper 41 contacts the bottom part 32D of the hydraulic motor housing 32. For this reason, the flow path 38 is closed by the stopper 41, and drain oil can be hold | maintained in 32 C of rotary mechanism accommodation chambers.

As a result, when the removed hydraulic motor 31 is transported to the repair shop, the drain oil remaining in the rotary mechanism accommodating chamber 32C of the hydraulic motor housing 32 leaks to the outside via the flow path 38. Can be reliably prevented and contamination of the circumference of the hydraulic motor 31 can be avoided, thereby improving the workability of the maintenance work.

As described above, according to the present embodiment, by providing the oil passage 38 in the hydraulic motor casing 32 of the hydraulic motor 31, the hydraulic pressure is directed toward the electric motor 23 serving as the counterpart member on which the hydraulic motor 31 is installed. The drain oil which stayed in the rotation mechanism accommodation chamber 32C of the motor housing 32 can flow down into the drain oil chamber 32K via the flow path 38. As a result, the drain oil from the hydraulic motor 31 is always used to properly lubricate the connecting portion between the female spline portion 27B of the electric motor shaft 27 and the male spline portion 34A of the hydraulic motor shaft 34. The reliability of the turning device 11 using the electric motor 23 and the hydraulic motor 31 can be improved.

Moreover, when the hydraulic motor housing 32 is provided above the electric motor housing 24 by providing the flow path opening / closing means 39 which opens and closes the flow path 38 in the hydraulic motor housing 32, it opens and closes a flow path. The means 39 can automatically open the flow passage 38. As a result, the drain oil which stayed in the rotating mechanism accommodation chamber 32C of the hydraulic motor housing 32 can be reliably flowed into the drain oil chamber 32K via the flow path 38, and the electric motor shaft 27 The connection between the female spline portion 27B and the male spline portion 34A of the hydraulic motor shaft 34 can be lubricated.

On the other hand, when the hydraulic motor housing 32 is removed from the electric motor housing 24 in order to perform maintenance or the like, the oil passage 38 can be automatically closed by the oil passage opening / closing means 39. For this reason, drain oil can be hold | maintained in the rotating mechanism accommodation chamber 32C of the hydraulic motor housing 32, and it can prevent that the said drain oil leaks to the exterior of the hydraulic motor 31. FIG. As a result, when the removed hydraulic motor 31 is transported to a repair shop or the like, for example, the surroundings of the hydraulic motor 31 can be prevented from being contaminated with drain oil, thereby improving workability of maintenance work. have.

Next, Figs. 7 to 9 show a second embodiment of the present invention. The characteristic of this embodiment is what comprised the flow path opening and closing means by the valve member and the protrusion member. In addition, in this embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

In the figure, 51 represents a hydraulic motor according to the second embodiment, and the hydraulic motor 51 is almost the same as the hydraulic motor 31 according to the first embodiment, the hydraulic motor housing 32 and the hydraulic motor shaft ( 34), the rotating mechanism 36, the oil seal 37, etc. are comprised. However, the hydraulic motor 51 differs from the hydraulic motor 31 according to the first embodiment in terms of the configuration of the flow path 52 and the flow path opening and closing means 53 described later.

52 represents a flow path used in the second embodiment, and the flow path 52 is similar to the flow path 38 according to the first embodiment, the rotary mechanism accommodation chamber 32C and the drain oil of the hydraulic motor housing 32. It is provided through the chamber 32K. However, the flow path 52 does not have the same inner diameter dimension as the flow path 38, but is comprised by the lower flow path 52A, the intermediate flow path 52B, and the upper flow path 52C, respectively, which have different inner diameter dimensions.

Here, the lower side flow path 52A which comprises the lower end part of the flow path 52 has an inner diameter dimension smaller than the outer diameter dimension of the spherical valve body 54 mentioned later, and extends up and down. The intermediate flow path 52B which comprises the intermediate part of the flow path 52 has an inner diameter dimension larger than the outer diameter dimension of the spherical valve body 54, and is arrange | positioned concentrically with the lower flow path 52A. The upper flow path 52C constituting the upper end of the flow path 52 has an inner diameter dimension larger than that of the intermediate flow path 52B, and is disposed concentric with the intermediate flow path 52B. The stepped portion between the lower flow passage 52A and the intermediate flow passage 52B is an annular valve seat 52D in which the spherical valve body 54 described later is attached and detached. Moreover, the lid member 56 mentioned later is provided in 52 C of upper flow paths.

Next, reference numeral 53 denotes a flow path opening and closing means according to the second embodiment, and the flow path opening and closing means 53 is a flow path 52 in accordance with the installation and removal of the hydraulic motor housing 32 with respect to the electric motor housing 23. To open and close them. Here, the flow path opening / closing means 53 is comprised by the spherical valve body 54 and the protrusion member 55 mentioned later.

54 is a spherical valve element as a valve member constituting the flow path opening and closing means 53, and the spherical valve body 54 is larger than the inner diameter of the lower flow path 52A constituting the flow path 52, and is an intermediate flow path. It is comprised by the steel ball which has an outer diameter dimension smaller than the inner diameter dimension of 52B. And the spherical valve body 54 is spaced apart from the valve seat 52D of the flow path 52, and the valve opening position which opens the said flow path 52, as shown in FIG. As described above, the valve seat 52D of the flow path 52 is seated and moves between the valve closing positions for closing the flow path 52.

55 is a projection member provided in the electric motor housing 24 of the electric motor 23 used as a counterpart member, and the said projection member 55 moves the spherical valve body 54 to a valve closing position and a valve opening position. will be. The projection member 55 includes a small diameter shaft portion 55A having an outer diameter dimension smaller than the inner diameter dimension of the lower flow passage 52A constituting the flow passage 52, and a large diameter shaft portion having an outer diameter dimension larger than the small diameter shaft portion 55A. 55B is formed in the columnar shape with a level | step difference. The protruding member 55 fixes the lower end of the large diameter shaft portion 55B to a portion of the cover portion 24B of the electric motor housing 24 that faces the flow path 52 in the up and down directions, thereby covering the cover portion ( It protrudes toward the flow path 52 of the hydraulic motor housing 32 from 24B.

Therefore, as shown in FIG. 8, when the hydraulic motor housing 32 is provided above the electric motor housing 24, 55 A of small diameter shaft parts of the projection member 55 will be the lower flow path of the flow path 52. As shown in FIG. It penetrates into the intermediate flow path 52B from 52A. For this reason, the spherical valve body 54 is lifted upward by the projection member 55, moves to the valve open position, and the flow path 52 is opened. On the other hand, as shown in FIG. 9, when the hydraulic motor housing 32 is removed from the electric motor housing 24, 55 A of small diameter shaft parts of the projection member 55 are 52 A of lower flow paths of the flow path 52. As shown in FIG. ) Is released downward. For this reason, the spherical valve body 54 moves to the valve closing position by its own weight, and the flow path 52 is closed.

56 is a cover member provided in the upper flow path 52C of the flow path 52, The said cover member 56 consists of an annular body through which the through-hole 56A smaller than the outer diameter dimension of the spherical valve body 54 was drilled. And the cover member 56 is provided in the upper flow path 52C in the state which arrange | positioned the spherical valve body 54 in the intermediate flow path 52B of the flow path 52, and makes the spherical valve body 54 intermediate. It keeps movable in the flow path 52B.

The hydraulic motor 51 which concerns on 2nd Embodiment has the flow path 52 and the flow path opening / closing means 53 as mentioned above, When the hydraulic motor housing 32 is provided above the electric motor housing 24, As shown in FIG. 8, 55 A of small diameter shaft parts of the projection member 55 penetrate into the intermediate flow path 52B from the lower flow path 52A of the flow path 52. For this reason, the spherical valve body 54 is lifted upward by the projection member 55, the spherical valve body 54 moves to the valve opening position, and the flow path 52 is automatically opened. As a result, the drain oil from the hydraulic motor 51 is always used to properly lubricate the connecting portion between the female spline portion 27B of the electric motor shaft 27 and the male spline portion 34A of the hydraulic motor shaft 34. can do.

On the other hand, when the hydraulic motor housing 32 is removed from the electric motor housing 24, as shown in FIG. 9, the small diameter shaft portion 55A of the protruding member 55 is the lower flow path 52A of the flow path 52. ) Is released downward. For this reason, the spherical valve body 54 moves to the valve closing position by its own weight, and the flow path 52 is automatically closed. As a result, the drain oil can be held in the rotary mechanism accommodating chamber 32C of the hydraulic motor housing 32, so that the drain oil can be prevented from leaking to the outside.

Next, FIG. 10 and FIG. 11 show 3rd embodiment of this invention, The characteristic of this embodiment is what comprised the channel opening-closing means by the plate-shaped valve body and the protrusion member. In addition, in this embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

In the figure, 61 represents a hydraulic motor according to the third embodiment, and the hydraulic motor 61 is substantially the same as the hydraulic motor 31 according to the first embodiment, the hydraulic motor housing 32 and the hydraulic motor shaft ( 34, the rotary mechanism 36, the oil seal 37, the flow path 38, etc., but differs from the hydraulic motor 31 according to the first embodiment in terms of the configuration of the flow path opening and closing means 62 described later.

62 shows a flow path opening and closing means according to the third embodiment, wherein the flow path opening and closing means 62 opens the flow path 38 in accordance with the installation and removal of the hydraulic motor housing 32 with respect to the electric motor housing 23. To close. Here, the channel opening-closing means 62 is comprised by the plate-shaped valve body 63 and the protrusion member 64 mentioned later.

63 is a plate-shaped valve element as a valve member, and the plate-shaped valve element 63 is disposed near the valve seat 32L formed around the flow path 38 among the bottom portions 32D of the hydraulic motor housing 32. The valve 38 is spaced apart from the valve seat 32L with the hinge 63A as the center, and the valve 38 is seated in the valve opening position (the position in FIG. 10) to open the passage 38 and the valve seat 32L. It is to move between the closing valve closing position (position of FIG. 11).

64 is a projection member provided in the electric motor housing 24 of the electric motor 23 used as a counterpart member, The said projection member 64 is 64 A of small diameter shaft parts which have an outer diameter dimension smaller than the inner diameter dimension of the flow path 38. As shown in FIG. And a large diameter shaft portion 64B having an outer diameter dimension larger than that of the small diameter shaft portion 64A, and is formed in a stepped cylindrical shape. The projection member 64 fixes the large diameter shaft portion 64B to a portion of the cover portion 24B of the electric motor housing 24 that faces the flow path 38 in the up and down directions, thereby covering the cover portion 24B. Protrudes toward the flow path 38 of the hydraulic motor housing 32.

The hydraulic motor 61 which concerns on 3rd Embodiment has the flow path opening and closing means 62 as mentioned above, and when the hydraulic motor housing 32 is provided above the electric motor housing 24, it is shown in FIG. As described above, the small diameter shaft portion 64A of the protruding member 64 is inserted into the flow passage 38. For this reason, the plate-shaped valve body 63 is lifted upward by the projection member 64, and the flow path 38 is opened automatically by moving to the valve opening position centering on the hinge part 63A. As a result, the connection between the female spline portion 27B of the electric motor shaft 27 and the male spline portion 34A of the hydraulic motor shaft 34 is always properly lubricated using the drain oil from the hydraulic motor 61. Can be.

On the other hand, when the hydraulic motor housing 32 is removed from the electric motor housing 24, as shown in FIG. 11, the small diameter shaft portion 64A of the protruding member 64 is separated from the flow path 38 downward. As a result, the plate-shaped valve body 63 moves to the valve closing position by its own weight and the flow path 38 is automatically closed, so that the drain oil is held in the rotary mechanism accommodation chamber 32C of the hydraulic motor housing 32. It is possible to prevent the drain oil from leaking to the outside.

Next, FIG. 12 shows 4th embodiment of this invention, The characteristic of this embodiment is what used the sealing stopper as a flow path opening and closing means. In addition, in this embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

In the figure, 71 denotes a hydraulic motor according to the fourth embodiment, and the hydraulic motor 71 is almost the same as the hydraulic motor 31 according to the first embodiment, and the hydraulic motor housing 32 and the hydraulic motor shaft ( 34, the rotary mechanism 36, the oil seal 37, the flow path 38 and the like, but the hydraulic motor 31 according to the first embodiment in that the flow opening and closing means is constituted by the sealing plug 72 to be described later. ) Is different.

72 has shown the sealing stopper as a channel opening-closing means which opens and closes the flow path 38. As shown in FIG. The sealing stopper 72 is formed by using an elastic material such as rubber, for example, has an outer diameter dimension slightly larger than the inner diameter dimension of the flow path 38, and is fitted with a fastener in the flow path 38. 72 A of stoppers 72B which make the shaft part 72A and the disk shape larger diameter than the said shaft part 72A, and becomes a handle at the time of extracting the shaft part 72A from the flow path 38 by contacting the lower surface of the hydraulic motor housing 32. FIG. It is comprised by.

The hydraulic motor 71 which concerns on 4th Embodiment has the sealing stopper 72 as mentioned above. When the hydraulic motor 71 is installed above the electric motor 23, an operator advances the flow path 38 beforehand. The hydraulic motor housing 32 is provided on the cover part 24B of the electric motor housing 24 in the state which the said flow path 38 opened by removing the sealing stopper 72 from this.

On the other hand, when removing the hydraulic motor 31 from the electric motor 23, an operator fits the shaft part 72A of the sealing stopper 72 to the flow path 38 at the lower surface side of the hydraulic motor housing 32. As shown in FIG. For this reason, drain oil can be hold | maintained in the rotating mechanism accommodation chamber 32C of the hydraulic motor housing 32, and it can prevent that the said drain oil leaks to the exterior.

In addition, in 1st Embodiment mentioned above, the electric motor 23 is illustrated as a counterpart member which installs the hydraulic motor 31. As shown in FIG. However, this invention is not limited to this, For example, as shown in the modification shown in FIG. 13, the reducer 12 is used as a counterpart member, and the hydraulic motor 31 is provided above the reducer 12. FIG. It is good also as a structure to make. In this case, the hydraulic motor is provided on the upper end side of the upper housing 15 of the reducer 12 by protruding the filler plate 73 protruding downward from the inner circumferential surface of the oil pressure housing 38 of the hydraulic motor housing 32. In a state where the housing 32 is provided above the upper housing 15, the weight member 42 of the flow path opening and closing means 39 is fitted to the filler plate 73 to open the flow path 38.

As the counterpart member on which the hydraulic motor is installed, in addition to the electric motor 23 and the reducer 12 described above, for example, a test apparatus for a hydraulic motor can also be applied.

12: Reducer (Relative Member)
16, 17: planetary gear reduction mechanism (deceleration mechanism)
23: electric motor (relative member) 27: electric motor shaft
31, 51, 61, 71: hydraulic motor
32: hydraulic motor housing (motor housing)
34: hydraulic motor shaft 36: rotary mechanism
37: oil seal 38, 52: euro
39, 53, 62: flow opening and closing means 40: shaft
41: stopper 42: weight member
43: communication path
54: spherical valve member (valve member) 55, 64: protrusion member
63: plate-shaped valve body (valve member)
72: sealing stopper (euro opening and closing means)

Claims (6)

A motor housing provided above the counterpart member, a hydraulic motor shaft having a lower end protruding from the motor housing and connected to the counterpart member; A hydraulic motor comprising a rotating mechanism for rotating a shaft and an oil seal provided between the motor housing and the hydraulic motor shaft to seal drain oil in the motor housing against the outside.
The motor housing is provided with a flow passage through which the drain oil in the motor housing flows out toward the counterpart member,
A hydraulic motor, characterized in that a flow path opening and closing means for closing the flow path is provided when the flow path is opened when the motor housing is provided in the counterpart member, and the motor housing is removed from the counterpart member. The electric motor of claim 1, wherein the counterpart member is provided under the motor housing and is connected to the hydraulic motor shaft and is provided with an electric motor shaft which is integrally rotated with the hydraulic motor shaft by supplying electric power. And the flow path opening / closing means opens the flow path when the motor housing is provided above the electric motor so that drain oil in the motor housing is supplied to the connection portion between the motor shaft and the electric motor shaft through the flow path. A hydraulic motor, characterized in that consisting of. The said counterpart member is comprised by the speed reducer provided in the lower side of the said motor housing, and connected with the said hydraulic motor shaft, and equipped with the deceleration mechanism which slows rotation of the said hydraulic motor shaft, The upper side of the said speed reducer And a flow path opening / closing means opens the flow path when the motor housing is installed in the motor housing so that the drain oil in the motor housing is supplied to the deceleration mechanism of the speed reducer via the flow path. The said flow path opening-and-closing means is a shaft body in any one of Claims 1-3 provided with the stopper which penetrates in the said flow path so that it can move to an up-down direction, and the stopper which contacts the said motor housing in the upper end part, And a weight member provided on the lower end side of the shaft, and a communication path provided in the axial direction of the shaft to communicate the inside and the outside of the motor housing when the stopper is lifted upward from the motor housing. When the housing is removed from the counterpart member, the stopper is brought into contact with the motor housing by the weight member, and when the motor housing is installed in the counterpart member, the weight member is fitted to the counterpart member, and the stopper is removed from the motor housing. Characterized by consisting of the lifting upward configuration Hydraulic motor. The valve member according to any one of claims 1 to 3, wherein the flow passage opening and closing means is provided in the motor housing and moves between a valve opening position for opening the flow passage and a valve closing position for closing the flow passage. And a projection member protruding toward the motor housing in a portion of the other member corresponding to the flow path, and when the motor housing is removed from the other member, the valve member moves to the valve closing position by its own weight. When the said motor housing is provided in the other member, the said projection member is comprised so that the said valve member may lift up and move it from a valve closing position to a valve opening position, The hydraulic motor characterized by the above-mentioned. The said flow path opening-and-closing means opens the said flow path by removing it from the said flow path, when installing the said motor housing to the said counterpart member, and removes the said motor housing from the said counterpart member in any one of Claims 1-3. The hydraulic motor comprising a sealing plug which closes the flow path by fitting it to the flow path.

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