JP2001198744A - Assembly method and assembly device for hydraulic motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembling performance by facilitating the butting work of a head casing on a casing body. SOLUTION: A hydraulic motor assembly device 21 comprises a conveyor 22 for transferring a casing body assembly and a head casing assembly, a holding mechanism 32 for holding the head casing assembly, a reciprocating mechanism 24 for laterally moving the holding mechanism 32, and a lifting/lowering mechanism 27 for moving the holding mechanism 32 vertically. While held by the holding mechanism 32, the head casing assembly is lifted by the lifting/ lowering mechanism 27. After positioned by the reciprocating mechanism 24 in relation to the casing body assembly, the head casing assembly is lowered by the lifting/lowering mechanism 27 so as to be butted against the casing body assembly, which are both placed into an assembled relation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for assembling a hydraulic motor suitable for assembling a hydraulic motor provided in, for example, a hydraulic shovel, a hydraulic crane, and the like.

[0002]

2. Description of the Related Art In general, a construction machine such as a hydraulic shovel or a hydraulic crane comprises a traveling body and a revolving body mounted on the traveling body via a revolving device so as to be pivotable. For example, a working device for excavating earth and sand is provided so as to be able to move up and down.

[0003] In the construction machine, a traveling hydraulic motor for orbiting the crawler belt is provided on the traveling body, and a turning hydraulic motor serving as a driving source of the turning device is provided on the revolving body.

Here, these hydraulic motors are composed of a casing composed of a bottomed cylindrical casing body and a head casing attached to the opening side of the casing body, a rotating shaft rotatably provided in the casing, Provided in the casing so as to rotate integrally with the rotating shaft,
A cylinder block in which a plurality of cylinders are formed is slidably inserted into each cylinder of the cylinder block, and pressurized oil is supplied to and discharged from each cylinder to reciprocate in each cylinder. It is roughly constituted by a plurality of pistons that rotationally drive a rotating shaft.

Next, a description will be given of an assembly operation of a hydraulic motor according to the prior art. First, when assembling the hydraulic motor, the rotating shaft, cylinder block,
Pistons and the like are sequentially assembled, and the casing main body to which these components are assembled is transported by the transport line with the opening facing upward. After assembling other components such as a counterbalance valve to the head casing, a lifting jig for a crane is mounted. When the assembly of the components is completed in this way, the head casing is lifted above the transport line by an overhead crane or the like via the lifting jig. And, for the casing body which is transported to the assembly work position by the transport line,
The head casing is lowered to the opening side of the casing main body by operating the overhead crane, and the casing main body and the head casing are abutted in a state where they are aligned, and fixed with bolts or the like.

[0006]

In the prior art described above, since the head casing is lifted by using an overhead crane, the operator is limited to those who are qualified to operate the crane, and the overhead crane is not used. Since the running section is located at a high place, the distance from the running section to the head casing is long, so that the subtle movement of the head casing is difficult, and the problem of requiring skill in the work of positioning the head casing with respect to the casing body. is there.

Further, when the head casing is lifted by the overhead crane, a lifting jig must be attached to the head casing, and there is a problem that workability is poor. In addition, since a plurality of types of hydraulic motors are assembled on one assembly line due to rationalization of assembly equipment, etc., each time the type of hydraulic motor (head casing) changes, the type of hydraulic motor at this time is changed. The lifting jig must be changed accordingly, and there is a problem that productivity is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to facilitate the work of abutment of a head casing with a casing main body and to improve the assembling workability. An object of the present invention is to provide a method of assembling a hydraulic motor and an assembling apparatus thereof.

It is another object of the present invention to provide a hydraulic motor assembling method and an assembling apparatus capable of easily coping with a change in the type of the hydraulic motor even when the type of the hydraulic motor is changed. It is in.

[0010]

According to a first aspect of the present invention, there is provided a hydraulic motor having a casing divided into a casing main body and a head casing. In the assembly direction of the hydraulic motor that abuts the head casing with the casing body in a state where the components of the motor are assembled to the casing body and the head casing, respectively, the casing body and the head casing in which the components are assembled in advance. Is transported using a transport line, and the head casing conveyed by the transport line is gripped and lifted upward, and the lifted head casing is lowered to a casing body that is transported next by the transport line. It is characterized in that both are assembled by abutting.

[0011] With this configuration, the casing main body and the head casing, in which the components are assembled in advance, are transported using the transport line, and the head casing transported by the transport line is gripped and held upward. By raising, the head casing stands by above the transport line. Next, the lifted head casing is lowered, and the head casing is brought into abutment with the casing body to be transported next by the transport line, whereby both can be assembled.

According to a second aspect of the present invention, in order to assemble a hydraulic motor having a casing divided into a casing main body and a head casing, each component of the hydraulic motor is assembled into the casing main body and the head casing, respectively. In a hydraulic motor assembling apparatus for abutting the head casing with a casing body in an assembled state, a transport line for transporting the casing body and the head casing to which the components are assembled, and a head transported by the transport line Gripping means for gripping the casing, lateral moving means for laterally moving the gripping means for aligning the head casing with respect to the casing body conveyed next by the transport line, and Up and down the gripping means to abut the body It is characterized in that a structure and a lifting means for lifting.

With this configuration, when the head casing on which the components are assembled is placed at the assembly operation position by the transfer line, the operator moves the gripping means in the lateral direction by the lateral moving means, and The means is located above the head casing. Next, the holding means is lowered to the position of the head casing by the elevating means, and the head casing is held by the holding means. After gripping the head casing by the gripping means in this way,
The head casing is lifted together with the gripping means by the lifting / lowering means, and waits at a position above the transport line.

Next, when the casing body to which the components are assembled is arranged at the assembly operation position by the transfer line, the operator moves the head casing gripped by the gripping means in the lateral direction by the lateral moving means, The head casing is aligned with the casing body. Then, by lowering the head casing toward the casing main body by the elevating means, the head casing is brought into contact with the casing main body, and the head casing is assembled to the casing main body in this state.

According to the third aspect of the present invention, the elevating means comprises an air cylinder provided with a gripping means on the distal end side of the rod, and the air cylinder is provided with a pressurized air source when lifting the head casing gripped by the gripping means. When the head casing gripped by the gripping means is lowered, the rod is extended by the weight of the gripping means by discharging the air to the outside when descending the head casing gripped by the gripping means.

With this configuration, when the head casing is lifted, the heavy head casing can be easily lifted by supplying air from a compressed air source to the air cylinder to reduce the rod. it can. On the other hand, when the head casing is lowered, the rod is extended by the weight of the head casing by discharging air to the outside, and the head casing can be easily lowered.

According to the fourth aspect of the present invention, the gripping means includes a supporting member which is raised and lowered by the lifting and lowering means, and a pair of protrusions provided on the head casing so as to be able to approach and separate from the supporting member. And a pair of gripping portions for gripping the head casing using the same.

[0018] With this configuration, each grip is disposed at a position sandwiching the head casing, and in this state, the grips are brought closer to each other to utilize the pair of protrusions formed on the head casing. Thus, the head casing can be gripped, and the head casing can be moved up and down together with the gripping means.

According to the fifth aspect of the present invention, the holding means includes a supporting member which is moved up and down by the elevating means, and a pair of movable plates which are provided to be able to approach and separate from the supporting member and have a plurality of mounting holes. And a gripping member that grips the head casing by using a pair of protrusions formed in the mounting hole of the movable plate so as to be changeable in position and formed in the head casing.

[0020] With this configuration, each gripping portion is arranged at a position sandwiching the head casing, and in this state, each movable plate approaches, whereby the gripping member has a pair of protrusions formed on the head casing. The head casing can be lifted and lowered together with the gripping means because the head casing is gripped by utilizing the above. In addition, when the type of the head casing changes, a plurality of types of head casings can be accommodated by changing the mounting position of the gripping member with respect to the plurality of mounting holes provided in each movable plate.

According to a sixth aspect of the present invention, the projecting portion of the head casing is a pair of plugs for closing a valve receiving hole for a counterbalance valve provided through the head casing from both sides.

With this configuration, the gripper can grip the head casing by using an existing plug provided on the head casing.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a hydraulic motor assembling apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10 by taking as an example a case of assembling a variable displacement swash plate type hydraulic motor for traveling. .

First, a hydraulic motor assembling apparatus 21 described later.
The variable displacement type swash plate hydraulic motor assembled by the above will be described with reference to FIGS. 1 and 2. FIG.

Reference numeral 1 denotes a casing of the hydraulic motor. The casing 1 is divided into a casing main body 2 and a head casing 3. Here, the casing body 2
Is formed in a bottomed cylindrical shape by a stepped tubular portion 2A and a bottom portion 2B that closes one axial side of the tubular portion 2A. The other end surface of the cylindrical portion 2A is an abutment surface 2C where the head casing 3 abuts. Further, on the outer peripheral side of the cylindrical portion 2A, a mounting flange 2D to be mounted on a track frame (neither is shown) of the traveling body is formed.

An insertion hole 3A into which the other end of the rotating shaft 6 to be described later is inserted is provided substantially at the center of the shaft of the head casing 3, and an abutting surface 2C of the casing body 2 is provided on the outer peripheral side. Is provided with a flange portion 3B which abuts on the flange portion. As shown in FIG. 2, a counterbalance valve 4 and the like are built in the head casing 3, and the counterbalance valve 4 is movably inserted into a valve body receiving hole 4A that penetrates left and right. And a pair of plugs 4C, 4C for closing the openings on both sides of the valve body housing hole 4A.

Then, the casing 1 is mounted on the casing main body 2 in a state where components such as a rotating shaft 6, a cylinder block 7, and a piston 9, which will be described later, are assembled in the casing main body 2.
The head casing 3 is attached to the opening side of the head, and is fixed by a plurality of bolts 5, 5,.

Reference numeral 6 denotes a rotating shaft rotatably provided in the casing 1. One end of the rotating shaft 6 is rotatably attached to the center of the bottom 2B of the casing body 2, and the other end of the head casing 3 is inserted therein. It is rotatably attached to the fitting hole 3A.

Reference numeral 7 denotes a cylinder block which is located in the casing 1 and spline-coupled so as to rotate integrally with the rotary shaft 6. The cylinder block 7 has a plurality (usually an odd number) of cylinders 7A and 7A extending in the axial direction. 7A are provided around the rotation shaft 6. Also, the cylinder block 7
A pair of eyebrow-shaped supply / discharge ports (not shown)
Is formed slidably.

Are pistons slidably inserted into the respective cylinders 7A of the cylinder block 7, and the respective pistons 9 are supplied and discharged into the respective cylinders 7A from the switching valve plate 8 side. The cylinder reciprocates in each cylinder 7 </ b> A by the pressure oil, and generates a rotational force about the rotation shaft 6 in the cylinder block 7. .. Denote a plurality of shoes provided at the end of each piston 9 so as to be swingable.

Reference numeral 11 denotes a swash plate provided on the bottom 2B side of the casing body 2, and the swash plate 11 guides each shoe 10. The swash plate 11 is tilted by the tilt piston 12, thereby adjusting the stroke of the piston 9 and making the capacity variable.

Here, the hydraulic motor is connected to the casing body 2.
, A casing body assembly 13 in which a rotary shaft 6, a cylinder block 7, a switching valve plate 8, each piston 9, a shoe 10, a swash plate 11, a tilting piston 12, and the like are assembled, and a counterbalance valve 4 and the like in the head casing 3. Is assembled to the head casing assembly 14 to which the assembling device 21 described later is attached.
Are assembled together. The switching valve plate 8
May be attached to the head casing 3 in a fixed state so as not to fall off.

Next, reference numeral 21 denotes a hydraulic motor assembling apparatus according to the present embodiment (see FIG. 3). The assembling apparatus 21 includes a conveyor device 22, an advance / retreat mechanism 24, an elevating mechanism 27,
It is roughly constituted by the gripping mechanism 32 and the like. In the present embodiment, the transport direction of the conveyor device 22 is set to the front and rear directions, and the transport direction of the conveyor device 22 (front and rear directions).
Are described as left and right directions.

Reference numeral 22 denotes a conveyor device forming a transport line for transporting the casing body assembly 13 and the head casing assembly 14. The conveyor device 22 includes the casing body assembly 13 and the head casing assembly 14. A transfer table 22A for transferring the sheet from one side to the other side is provided. Then, in the conveyor device 22, first, FIG.
As shown in the figure, the head casing assembly 14 has the flange portion 3B facing down, and the plugs 4C of the counter balance valve 4 are directed forward and backward, and the pedestal 22 is mounted on the carrier 22A.
B, and then, as shown in FIG. 10, the casing body assembly 13 is placed on the carrier 22A via the pedestal 22C with the opening side facing upward.

Reference numeral 23 denotes a column standing upright in the vicinity of the conveyor device 22, and reference numeral 24 denotes an advancing / retracting mechanism as a lateral moving means provided on the column 23, and the advancing / retracting mechanism 24 is provided on the column 23. Rail guides 25, 2 mounted
5 and a rail 26 attached to each of the rail guides 25 and capable of moving back and forth in the left and right directions substantially orthogonal to the conveying direction of the conveyor device 22.
The reciprocating mechanism 24 reciprocates a gripping mechanism 32 described later in the left and right directions (lateral direction) above the conveyor device 22.

Numeral 27 denotes an elevating mechanism as elevating means attached to the rail 26 of the advancing / retreating mechanism 24.
Is a bracket 28 having an L-shaped cross section attached to the tip of the rail 26, and a horizontal plate 28A of the bracket 28.
The air cylinder 29 is roughly constituted by an air cylinder 29 which is attached upward and downward and a rod 29A extends downward through the horizontal plate 28A.

The lifting mechanism 27 includes an air cylinder 2.
An air supply unit 30 for supplying high-pressure air to the apparatus 9 and an air discharge unit 31 for discharging air to the outside are provided. Here, the air supply unit 30 is provided with an air supply hose 3 having a distal end connected to an air chamber (not shown) below the air cylinder 29.
0A, a compressor 30B as a compressed air source connected to the base end side of the air supply hose 30A, and a foot switch 30C connected to the compressor 30B and controlling the supply of air to the air cylinder 29. ing.

On the other hand, the air discharge section 31 is composed of an air discharge hose 31A connected to the air chamber and a manual exhaust operation tool 31B connected to the air discharge hose 31A. The exhaust operation tool 31B is provided near the operator who performs the assembling work, and is capable of discharging the air while giving a throttle action to the air with an opening corresponding to the operation amount of the lever portion. What has the structure almost similar to the air ejection tool called an air gun may be sufficient.

Thus, the lifting mechanism 27 operates the foot switch 30C of the air supply unit 30 to supply air from the compressor 30B to the air cylinder 29 via the air supply hose 30A, to reduce the rod 29A and to reduce the head. The casing assembly 14 is lifted together with a gripping mechanism 32 described below. On the other hand, the exhaust operation tool 31 of the air discharge section 31
B, the air in the air cylinder 29 is discharged through the air discharge hose 31A, and the rod 29A is moved by the weight of the head casing assembly 14 and the gripping mechanism 32.
To allow the gripping mechanism 32 to descend.

Numeral 32 denotes a gripping mechanism as gripping means attached to the tip of the rod 29A of the air cylinder 29 constituting the lifting mechanism 27. The gripping mechanism 32 is, as shown in FIGS. , Interlocking unit 34,
It is roughly constituted by a movable plate 35, a gripping cup 36 and the like.

Reference numeral 33 denotes an elevating plate which is attached to the tip of the rod 29A of the air cylinder 29 and constitutes a support together with the interlocking unit 34. The elevating plate 33 has two guide rods 33A, 33 so as to sandwich the rod 29A.
A is erected, and each of the guide rods 33A extends upward through the horizontal plate 28A of the bracket 28. Thus, the lift plate 33 is prevented from rotating by the guide rods 33A.

Reference numeral 34 denotes an interlocking unit attached to the lower surface of the lifting plate 33.
As shown in the figure, a gear case 34A formed in a flat box shape having a small size in the upper and lower directions, and the gear case 34A
And a rack bar 34C, 34C meshing with the pinion 34B, extending parallel to different directions (front and rear directions) and projecting from the gear case 34A. I have.
The interlocking unit 34 has one rack bar 34C.
Is extended or contracted, the other rack bar 34C is similarly operated via the pinion 34B.

Reference numerals 35, 35 denote a pair of movable plates disposed on the front and rear sides of the interlocking unit 34 and arranged in parallel so as to face each other. Each of the movable plates 35 is a rectangle extending leftward and rightward. It is formed of a plate-like material. On the upper part of each movable plate 35, two slide rods 35A, 35A are provided which are separated in the left and right directions and extend forward and backward, and an interlocking unit 3 is provided between the slide rods 35A.
The fourth rack bar 34C is fixed.

Here, each slide rod 35A is slidably inserted into the gear case 34A of the interlocking unit 34. The movable plates 35 are connected to each other by an interlocking unit 34 so that they can approach and separate from each other.
Since the front and rear sides of A are approached and separated by the same distance, each movable plate 35 is always arranged at a symmetrical position. Further, on the worker side of each movable plate 35, a handle 3 to be gripped by the worker when the movable plates 35 are moved closer to or away from each other or when the entire gripping mechanism 32 is moved left and right.
5B are respectively fixed.

Further, as shown in FIG. 5, a plurality of mounting holes 35C, 35C,... Are formed in each movable plate 35. Each of the mounting holes 35C will be described later according to the type of the head casing 3. This is for changing the mounting position of the gripping cup 36.

Reference numerals 36, 36 denote gripping cups as a pair of gripping members mounted on the movable plate 35. Each of the gripping cups 36 is provided with a fitting hole 36A so as to oppose each other, and is opposite to the axial direction. Is formed with a bolt hole 36B. Each gripping cup 36 is attached to the movable plate 35 by inserting a bolt 37 into a mounting hole 35C of the movable plate 35 and screwing the bolt 37 into a bolt hole 36B. Further, the plug 4C of the counter balance valve 4 provided in the head casing 3 is fitted into the fitting hole 36A.

Reference numeral 38 designates a contact plate provided on the operator side of the gear case 34A constituting the interlocking unit 34. The contact plate 38 connects the gripping cup 36 attached to each movable plate 35 to the counterbalance valve 4. When the plug is fitted to the plug 4C, its lower end is brought into contact with the head casing 3 to prevent the head casing 3 from tilting and to keep the head casing 3 horizontal.

The hydraulic motor assembling apparatus 21 according to the present embodiment has the above-described configuration. Next, a method of assembling a hydraulic motor using the assembling apparatus 21 will be described.

First, a head casing assembly 14 in which the counterbalance valve 4 and the like are assembled to the head casing 3 is
With the flange portion 3B down and the plugs 4C of the counterbalance valve 4 facing forward and rearward, the conveyor device 2
It is placed on the second transfer table 22A via the base 22B. Next, the rotating shaft 6, the cylinder block 7, the switching valve plate 8, the respective pistons 9, the shoes 10, the swash plate 1,
1. The casing body assembly 13 to which the tilting piston 12 and the like are assembled is placed on the carrier 22A via the pedestal 22C with the abutment surface 2C of the casing body 2 facing upward.

In the gripping step, as shown in FIG. 7, when the head casing assembly 14 is conveyed to the assembly work position by the conveyor device 22, the handle 35B is gripped and the gripping mechanism 32 is moved left and right by the advance / retreat mechanism 24. By moving to the right, the gripping mechanism 32 is disposed above the head casing assembly 14. Next, the air discharge unit 3
The rod 29A is extended by manually operating the exhaust operation tool 31B to discharge the air from the air cylinder 29 that constitutes the elevating mechanism 27.
5 is disposed at a position sandwiching the head casing assembly 14 from the front and rear directions. In this state, as shown in FIG. 8, the movable plates 35 are brought close to each other, and the gripping cups 36 are fitted to the plugs 4C of the counter balance valve 4.

Next, in the lifting step, by operating the foot switch 30C of the air supply unit 30 to supply air to the air cylinder 29, as shown in FIG.
9A is reduced and the head casing assembly 14 gripped by the gripping mechanism 32 is lifted. In this lifting step, the air cylinder 29 is used to lift the head casing assembly 14, so that the heavy head casing assembly 14 can be easily lifted.

When the head casing assembly 14 is lifted, the contact plate 38 provided on the gripping mechanism 32 comes into contact with the head casing 3 and holds the head casing assembly 14 in a horizontal state. In the lifting process, the head casing assembly 14 is arranged at a position slightly higher than the height of the casing body assembly 13 in consideration of the positioning process to be performed next, and waits at this position.

Then, when the casing body assembly 13 is arranged at the assembly work position by the conveyor device 22, the process proceeds to a positioning step. In this alignment step, the head casing assembly 14 gripped by the gripping mechanism 32 by the advance / retreat mechanism 24 is finely adjusted left and right as shown by the arrow in FIG. Match.

Next, in the abutting step, the air from the air cylinder 29 is discharged by operating the exhaust operation tool 31B of the air discharge section 31, and the gripping mechanism 32 and the head casing assembly 14 are lowered by their own weights. Head casing 3
Is brought into contact with the abutting surface 2C of the casing body 2. Then, by fixing the head casing 3 to the casing main body 2 with the bolts 5 in this state, a hydraulic motor as shown in FIG. 1 can be assembled.

As described above, according to the present embodiment, the hydraulic motor assembling apparatus 21 includes the head casing assembly 1
4 and a gripping mechanism 32 for holding the
An advancing / retracting mechanism 24 for moving in the right direction;
Is constructed by the lifting mechanism 27 that moves up and down, so that there is no need to use an overhead crane as in the assembly work according to the related art, and anyone can operate the crane regardless of the qualification for crane operation. Can be. Further, since it is not hung from a high position unlike an overhead crane, no skill is required and even an inexperienced worker can perform assembling work. By these things, qualification,
Even inexperienced workers can easily and accurately assemble the hydraulic motor, improving the assembly workability,
Productivity can be increased.

In addition, since the assembling device 21 is integrally provided with the gripping mechanism 32 for gripping the head casing assembly 14, the operation of attaching the lifting jig to the head casing as in the prior art is omitted. In this respect, workability can be improved.

In recent years, a plurality of types of hydraulic motors are assembled on one assembly line due to rationalization of assembling equipment. In this embodiment, each movable plate constituting the gripping mechanism 32 is assembled. A plurality of mounting holes 35C are provided in 35, and the gripping cup 36 is selectively mounted in each of the mounting holes 35C. Thereby, when the type of the head casing 3 (hydraulic motor) changes, it is possible to respond quickly and easily by replacing the gripping cup 36 with another mounting hole 35C.
Productivity can be improved.

The lifting mechanism 27 includes an air cylinder 29.
The gripping mechanism 32 and the head casing assembly 14, which are heavy objects, can be easily lifted by the air cylinder 29. On the other hand, when lowering the gripping mechanism 32 and the head casing assembly 14, the air is discharged to the outside by operating the exhaust operation tool 31 </ b> B of the air discharging unit 31, so that the weight of the gripping mechanism 32 and the head casing assembly 14 is reduced. These can be lowered. Therefore, the configuration of the elevating mechanism 27 can be simplified, and it can be manufactured at low cost.

On the other hand, each gripping cup 36 of the gripping mechanism 32
Is fitted to each plug 4C of the counterbalance valve 4 provided in the head casing 3, so that the existing projection provided in the head casing 3 can be provided without separately providing a protrusion to which the gripping cup 36 fits. The gripping cup 36 can be fitted using the plug 4C.

Since the gripping mechanism 32 is provided with an interlocking unit 34 for causing each movable plate 35 to perform the same operation, when the head casing assembly 14 is gripped by the gripping mechanism 32, The head casing assembly 14 can be arranged at the center position in the left and right directions, and the head casing assembly 14 can be lifted in a well-balanced manner.

Further, the holding mechanism 32 is provided with a backing plate 38, and when the head casing assembly 14 is lifted, the backing plate 38 is brought into contact with the head casing 3 so that the head casing assembly 14 is in a horizontal state. Since the head casing 3 can be held, the head casing 3 can be properly abutted against the casing main body 2, and the assembling workability can be improved.

In the embodiment, each gripping cup 36 of the gripping mechanism 32 is described as being fitted to each plug 4C of the counterbalance valve 4 provided in the head casing 3, but the present invention is not limited to this. The gripping cup 36 is fitted to a part other than the plug 4C as long as the part is arranged at a substantially symmetrical position of the head casing 3 and has a protruding dimension to which each gripping cup 36 can fit. It may be configured.

In the embodiment, the variable displacement type swash plate type hydraulic motor has been described as an example of the hydraulic motor.
The present invention is not limited to this, and may be applied when assembling another hydraulic motor such as a fixed displacement swash plate hydraulic motor or a variable displacement or fixed displacement swash-axis hydraulic motor.

Furthermore, in the embodiment, the case where the traveling hydraulic motor mounted on the track frame of the traveling body is assembled by the assembling apparatus 21 has been described as an example. However, the present invention is not limited to this, and the present invention is not limited to this. May be used to assemble a turning hydraulic motor provided in a turning device for turning the turning body.

[0065]

As described in detail above, according to the first aspect of the present invention, the casing main body and the head casing to which the components are assembled in advance are transported by using the transport line, and are transported by the transport line. By gripping and lifting the head casing upward, the head casing can be made to stand by above the transport line. Next, the lifted head casing is lowered, and the head casing is brought into abutment with the casing body to be transported next by the transport line, whereby both can be assembled. As described above, since the head casing can be moved up and down while holding the head casing, the workability of assembling the hydraulic motor can be improved.

According to the second aspect of the present invention, the transport line for transporting the casing body and the head casing to which the components are assembled, the gripping means for gripping the head casing transported by the transport line, Lateral moving means for laterally moving the gripping means to align the head casing with the casing body next conveyed by the line, and the gripping means for abutting the head casing with the casing body. When the head casing to which the components are assembled is placed at the assembly operation position by the transport line, the worker can use the gripping means by the lateral moving means. The gripping means can be arranged above the head casing by moving the . Next, the holding means can be lowered to the position of the head casing by the elevating means, and the head casing can be held by the holding means. After the head casing is gripped by the gripping means in this way, the head casing can be held at a position above the transport line by lifting the head casing together with the gripping means by the elevating means.

Next, when the casing main body is placed at the assembling work position by the transfer line, the operator moves the head casing gripped by the gripping means in the lateral direction by the lateral moving means, thereby moving the head casing to the casing. It can be aligned with the body. Then, by lowering the head casing toward the casing main body by the elevating means, the head casing is brought into contact with the casing main body, and in this state, the head casing can be assembled to the casing main body.

As a result, there is no need to use an overhead crane as in the assembly work according to the prior art, and anyone can operate the crane regardless of whether or not he / she is qualified to operate the crane. Further, since it is not hung from a high position unlike an overhead crane, no skill is required and even an inexperienced worker can perform assembling work.

According to the third aspect of the present invention, the elevating means comprises an air cylinder provided with a gripping means on the distal end side of the rod, and the air cylinder is pressurized when ascending the head casing gripped by the gripping means. The rod is contracted by the air from the source, and when the head casing gripped by the gripping means is lowered, the rod is extended by its own weight by discharging the air to the outside. By supplying air from the source to the air cylinder to reduce the rod, the heavy head casing can be easily raised. On the other hand, when the head casing is lowered, the rod is extended by the weight of the head casing by discharging air to the outside, so that the head casing can be easily lowered, and the configuration can be simplified.

According to the fourth aspect of the present invention, the holding means includes a supporting member which is raised and lowered by the lifting and lowering means, and a pair of protrusions provided on the head casing so as to be able to approach and separate from the supporting member. And a pair of gripping portions that grip the head casing using the portion,
By disposing each gripping portion at a position sandwiching the head casing, and in this state, bringing the gripping portions close to each other, the head casing can be gripped by using a pair of protrusions formed on the head casing. , The configuration can be simplified.

According to the fifth aspect of the present invention, the holding means includes a supporting member which is moved up and down by the elevating means, and a pair of movable plates which are provided so as to be able to approach and separate from the supporting member and have a plurality of mounting holes. And a gripping member that grips the head casing by using a pair of protrusions formed on the head casing that are attached to the mounting holes of the movable plates so as to be changeable. By arranging the head casing at a position sandwiching the head casing and approaching each movable plate in this state, the gripping member can grip the head casing using a pair of protrusions formed on the head casing, Can be simplified.
Moreover, when the type of head casing changes,
By changing the mounting position of the gripping member with respect to the plurality of mounting holes provided in each movable plate, it is possible to quickly and easily cope with a plurality of types of head casings, and to improve assembling workability.

According to the sixth aspect of the present invention, since the projecting portion of the head casing is a pair of plugs for closing the valve housing holes for the counterbalance valve provided through the head casing from both sides, the projecting portions are formed. The grip portion can be fitted using an existing plug provided on the head casing without separately providing a portion.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a swash plate type hydraulic motor assembled by a hydraulic motor assembling apparatus according to an embodiment of the present invention.

FIG. 2 is a left side view showing the swash plate type hydraulic motor in FIG. 1 in a state where it is divided into two members, a casing body assembly and a head casing assembly.

FIG. 3 is a front view showing the hydraulic motor assembling apparatus according to the embodiment of the present invention.

FIG. 4 is an enlarged left side view showing a main part of the lifting mechanism and the gripping mechanism in FIG. 3;

FIG. 5 is a front view showing a gripping mechanism used in the embodiment of the present invention.

FIG. 6 shows an interlocking unit of the gripping mechanism as indicated by arrows VI-VI in FIG.
It is sectional drawing seen from the direction.

FIG. 7 is an operation explanatory view showing a state where the gripping mechanism is lowered to a position of a head casing assembly.

FIG. 8 is an operation explanatory view showing a state in which a gripping cup of a gripping mechanism is fitted to a plug of a counterbalance valve.

FIG. 9 is an operation explanatory view showing a state where the head casing assembly is lifted together with the gripping mechanism.

FIG. 10 is an operation explanatory view showing a state in which the casing main body assembly is disposed below the lifted head casing assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Casing main body 3 Head casing 4 Counter balance valve 4C Plug (projection part) 21 Hydraulic motor assembling device 22 Conveyor device (transport line) 24 Advance / retreat mechanism (lateral movement means) 27 Elevation mechanism (elevation means) 29 Air cylinder 29A rod 30 air supply unit 30B compressor (pressure air source) 31 air discharge unit 31B exhaust operation tool 32 gripping mechanism (gripping means) 33 lifting plate (support) 34 interlocking unit (support) 35 movable plate 35C mounting hole 36 gripping cup (Grip member)

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Masayoshi Kim 650 Kandate-cho, Tsuchiura-shi, Ibaraki Pref.Hitachi Construction Machinery Co., Ltd. F-term in Tsuchiura Plant (reference) 3C030 BC04 BC17 BC21 DA23 DA25 DA33 3H084 AA06 AA08 AA45 BB24 BB30 CC58 CC70

Claims (6)

[Claims] In order to assemble a hydraulic motor having a casing divided into a casing main body and a head casing, the components of the hydraulic motor are assembled to the casing main body and the head casing, respectively. A method for assembling a hydraulic motor in which a head casing is abutted with a casing main body, wherein the casing main body and the head casing to which components have been previously assembled are transported using a transport line, and the head casing transported by the transport line The hydraulic motor is characterized in that the two are assembled by gripping and lifting upward, lowering the lifted head casing and abutting the casing body which is transported next by the transport line. Assembly method. 2. In order to assemble a hydraulic motor having a casing divided into a casing main body and a head casing, the components of the hydraulic motor are assembled to the casing main body and the head casing, respectively. In a hydraulic motor assembling apparatus in which a head casing is abutted with a casing main body, the casing main body to which components are assembled and a transport line that transports the head casing, and a head casing that is transported by the transport line are gripped. Gripping means, lateral moving means for moving the gripping means in a lateral direction to align the head casing with the casing body conveyed next by the conveying line, and contacting the head casing with the casing body. Lifting and lowering the gripping means in order to fit together Assembly device for a hydraulic motor, characterized in that a structure and means. 3. The lifting means comprises an air cylinder provided with the gripping means at the tip end of a rod, and the air cylinder is driven by air from a pressure source when lifting the head casing gripped by the gripping means. 3. The hydraulic motor assembling apparatus according to claim 2, wherein the rod is contracted, and when the head casing held by the holding means is lowered, the rod is extended by its own weight by discharging air to the outside. 4. The gripping means includes a supporting member which is raised and lowered by the lifting and lowering means, and a pair of protrusions provided on the head casing so as to be able to approach and separate from each other with respect to the supporting member. 4. A head casing comprising a pair of grippers for gripping the head casing.
A hydraulic motor assembling apparatus according to Claim 1. 5. The holding means comprises: a support which is raised and lowered by the lifting means; a pair of movable plates which are provided so as to be able to approach and separate from the support and have a plurality of mounting holes; The hydraulic motor according to claim 2, further comprising a gripping member that is mounted to the mounting hole of the plate so as to be changeable in position and that grips the head casing using a pair of protrusions formed in the head casing. Assembly equipment. 6. The hydraulic pressure according to claim 4, wherein the projecting portion of the head casing is a pair of plugs for closing a valve receiving hole for a counterbalance valve provided through the head casing from both sides. Motor assembly equipment.