JPH05180145A - Hydraulic motor - Google Patents

Abstract

PURPOSE:To provide a hydraulic motor which has a small number of parts and is small-sized and needs only a small provision space. CONSTITUTION:An output means 5 which has a casing 16 and is assembled concentrically and rotatably to an input means 1 having an input shaft 4 provided with an inlet port 2 and an outlet port 3, is equipped. An internal tooth member 6 and a rotary valve member 7 are provided at this output means 5, and in the internal tooth member 6, an external tooth member 8 meshing with the member 6 is provided, and a stationary valve member 9 connected to the input shaft 4 in order to switch the circulation of a fluid in cooperation with the rotary valve member 7 is provided at the input shaft 4. In addition, a connection shaft 12 connected to the input shaft 4 is provided so that the external tooth member 8 may revolve, but may not rotate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic motor having a displacement mechanism having internal and external tooth members.

[0002]

2. Description of the Related Art As a typical example of this type of conventional device, the one shown in FIGS. 7 and 8 is well known, and will be schematically described with reference to the drawings.
This hydraulic motor C includes a shaft support casing 102 and a displacement mechanism 1.
03, the stationary valve member 104, the output shaft 111 and the rotary valve member 123. Then, the displacement mechanism 103 has a
An external tooth member 108 having a small number of teeth is eccentrically arranged, and a volume change chamber 109 that expands and contracts due to relative movement and rotational movement between the internal tooth member 107 and the external tooth member 108.
To form.

The shaft support casing 102 has an inlet port 105 and an outlet port 106, and further has an output shaft 111 rotatably supported therein, and the output shaft 111 has an internal spline 112. An external tooth spline 114 formed at one end of the transmission shaft 113 meshes with the internal tooth spline 112. Another external tooth spline 116 is provided at the other end of the transmission shaft 113, and the internal tooth spline 1 formed in the inner hole of the external tooth member 108.
It meshes with 17. When the number of inner teeth of the inner tooth member 107 is 7, the number of outer teeth of the outer tooth member 108 is decreased by 1 to 6.

The stationary valve member 104 is formed on the inner peripheral surface of the shaft support casing 102 and has a plurality of flow paths 110, each of which is formed in the flow path 120 and the output shaft 111 of the shaft support casing 102. Flow path 121 provided on the valve surface of the valve member 123
It is designed to communicate with.

The operation of this type of fluid motor is generally known to those skilled in the art, and the high pressure oil fed from the inlet port 105 passes through the rotary valve member 123 and the stationary valve member 104, and then the volume change chamber of the displacement mechanism 103. It is sequentially introduced into 109, and the pressure causes the external tooth member 108 to rotate while revolving in the internal tooth member 107, and at this time, the rotary valve member 123 also rotates to switch the valve with the stationary valve member 104. The volume change chamber 109 on the low pressure side of the displacement mechanism 103
The returned oil inside is discharged from the outlet port 106 via the stationary valve member 104 and the rotary valve member 123. FIG. 9 shows the positional relationship between the displacement mechanism 103 (upper part) and the valve members 104 and 123 (lower part) when the operation of the hydraulic motor is started, that is, when the external tooth member 108 is at the zero position. In the flow paths of the members 104 and 123, the hatched area indicates the inlet port 10
5 is the high pressure side that communicates with the rest of the
The low-pressure side communicating with each is shown. FIG. 10 shows the case where the external tooth member 108 makes a 1/14 rotation next to the above, and FIG. 11 shows the case where the external tooth member 108 makes a 1/7 rotation next to the same.

In this way, the external tooth member 108 becomes the internal tooth member 107.
When it revolves 6 times inside, it rotates once, and as a result, the transmission shaft
One complete rotation movement of 113 and output shaft 111 is obtained. During this time, since the output shaft 111 and the rotary valve member 123 are integrated,
The rotary valve member 123 rotates with respect to the stationary valve member 104 in the same manner as the conventional one, and the valves are switched in this manner. This is the case where the port 105 is used as the outlet port, and conversely, when the port 106 is used as the inlet port, the flow is opposite to the above.

[0007]

FIG. 12 shows the one in which the hydraulic motor C as described above is used to drive the winch drum 122. The power of the output shaft projects from the shaft support casing 102. Since it is supplied by 111, the hydraulic motor 101 and the winch drum 122 are arranged in parallel, and the overall axial length is increased. On the other hand, recently, there has been an increasing demand for miniaturizing such devices. However, the use of the hydraulic motor 101 as described above has a problem in that it is not possible to satisfy such requirements because the axial length is long, and miniaturization cannot be achieved.

Therefore, an object of the present invention is to solve the problems of the conventional hydraulic motor described above, shorten the axial length, and further reduce the number of parts to downsize the equipment using the same. An object of the present invention is to provide a hydraulic motor that can meet the above demands.

[0009]

In order to achieve the above-mentioned object, the present invention has an input means having an input shaft provided with an inlet port and an outlet port, and a rotation concentric with the input means. And an output means having a casing that is operably assembled, the output means is provided with an internal tooth member and a rotary valve member, and an external tooth member meshing with the internal tooth member is provided in the internal tooth member, and an input shaft is provided. Is provided with a stationary valve member that constitutes a valve mechanism in cooperation with the rotary valve member to switch the flow of fluid, and a connecting shaft that connects the external tooth member to the input shaft so as to revolve but not rotate. It is characterized by being provided.

[0010]

In the hydraulic motor of the present invention as described above,
The high pressure oil that has flowed in from the inlet port of the input shaft of the input means
It flows through the casing, the stationary valve member, and the rotary valve member into the volume displacement chamber on the high pressure side of the displacement mechanism, revolves the outer tooth member and rotates the inner tooth member, and outputs a high torque from the output means provided therewith. The output is performed, and the rotation causes the rotary valve member to rotate integrally with the internal tooth member, and the valve is switched between the stationary valve member and the stationary valve member. And while doing in this way, the return oil in the volume change chamber on the low pressure side of the displacement mechanism is
It is discharged from the outlet port of the input shaft through the stationary valve member and the casing.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiments of the present invention shown in FIGS. 1, 2, 3 and 4, the description of the same parts as those of the conventional hydraulic motor will be omitted, and the different points will be mainly described. Reference numeral 1 is an input means having an input shaft 4 provided with an inlet port 2 and an outlet port 3. An output means 5 is concentrically and rotatably attached to the input means 1, and the output means 5 is A casing 16, an internal tooth member 6 and a rotary valve member 7 are provided, and an external tooth member 8 meshing with the internal tooth member 6 is provided in the internal tooth member 6, and the surface of the input shaft 4 cooperates with the rotary valve member 7. In order to switch the flow of the fluid, a stationary valve member 9 that constitutes the valve mechanism 11 is formed, and a connecting shaft 12 that connects the external tooth member 8 to the input shaft 4 so as to revolve but not rotate is provided. ing.

The output means 5 is first from the left side in FIG.
The end cap 14, the casing 16, the internal tooth member 6, and the second end cap 17 are arranged in this order, and the first end cap 14
The casing 16 and the casing 16 are connected by a first bolt 23, and the casing 16, the internal tooth member 6 and the second end cap 17 are connected by a second bolt 24, respectively. Both tooth members 6, 8
The displacement mechanism 10 is constituted by the above, and the outer tooth member 8 having a smaller number of teeth than that is eccentrically arranged in the inner tooth member 6 and the volume change chamber 13 is formed between the both tooth members 6 and 8. .. An inner tooth spline 18 is provided on the inner circumference of the outer tooth member 8, an outer tooth spline 19 formed at one end of the connecting shaft 12 meshes with the outer tooth spline 20, and an outer tooth spline 20 formed at the other end rotates. It meshes with the internal spline 21 formed in the internal hole of the valve member 7. The stationary valve member 9 is formed on the outer peripheral surface of the input shaft 4 and has a plurality of flow paths 26 and 27, each of which is provided on the surface of the rotary valve member 7 formed on the inner peripheral surface of the casing 16. Flow path 28
And the flow path 28 of the rotary valve member 7 is connected to the flow path of the casing 16.
It is designed to communicate with 29.

In the hydraulic motor as described above, the displacement mechanism 10, the valve mechanism 11 and the like are basically the same as the conventional ones, and the high pressure oil flowing from the inlet port 2 of the input shaft 4 of the input means 1 is It flows through the casing 16, the stationary valve member 9 and the rotary valve member 7 into the volume displacement chamber 13 on the high pressure side of the displacement mechanism 10, and the internal tooth member 8 which is non-rotatably attached to the input shaft 4 by its pressure When it is revolved in the tooth member 6 and the number of times is 6, the inner tooth member 6 rotates once, and high torque is output from the output means 5 provided therein. This rotation causes the rotary valve member 7 to rotate integrally with the internal tooth member 6,
The valve is switched between the stationary valve member 9 and the displacement mechanism 10
The return oil in the low-pressure side volume change chamber 13 is discharged from the outlet port 3 of the input shaft 4 via the rotary valve member 7, the stationary valve member 9 and the casing 16. FIG. 2 shows the positional relationship between the displacement mechanism 10 (upper part) and the valve mechanism 11 (lower part) when the operation of the hydraulic motor is started, that is, when the internal tooth member 6 is at the zero position in the above-mentioned case. In the flow paths of the members 7 and 9, the hatched portion indicates the high-pressure side communicating with the inlet port 2, and the other portions indicate the low-pressure side communicating with the outlet port 3. FIG. 3 shows the same as the above.
Fig. 14 shows the same as Fig. 14 when the internal tooth member 6
Shows the case where each has rotated 1/7. In this way, the inner tooth member 6 rotates once when the outer tooth member 8 revolves inside the inner tooth member 6 six times, and as a result, the output means 5 rotates once in the direction of the arrow.

FIGS. 5 and 6 show the hydraulic motor A used to drive the winch drum 122. The hydraulic motor A is as described above, and the casing is the output means 5. Therefore, the output means 5 can be built in the winch drum 122, and as a result, the axial length can be shortened and the overall size can be reduced. 5 shows an example in which the winch drum 122 is fitted on the output means 5 of the hydraulic motor A, and FIG. 6 shows an example in which the output means 5 of the hydraulic motor A itself is the winch drum 122.

[0015]

The present invention is as described above, and the output means has the casing concentrically and rotatably assembled to the input means having the input shaft provided with the inlet port and the outlet port. The output means is provided with an internal tooth member and a rotary valve member, the internal tooth member is provided with an external tooth member meshing with the internal tooth member, and the input shaft is provided with a fluid in cooperation with the rotary valve member. Is provided with a stationary valve member connected to the input shaft for switching the flow of, and further provided with a connecting shaft that connects the external tooth member to the input shaft so as to revolve but not rotate, the casing, the internal tooth member, and Since the rotary valve member serves as the output means as it is, the conventional hydraulic motor has the above-mentioned members and the output means separately, so that the axial length becomes long and the whole size of the equipment using the same increases. Solve the problem of growing And, yet also reduce the number of parts,
There is an effect that the device can be downsized, and therefore the device in which it is installed can be downsized.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a positional relationship between the displacement mechanism and the valve mechanism at the start of the operation of the above.

FIG. 3 is an explanatory diagram of a positional relationship between the displacement mechanism and the valve mechanism after the start of the above operation.

FIG. 4 is an explanatory diagram of a positional relationship between a displacement mechanism and a valve mechanism that are further after the above.

FIG. 5 is an explanatory diagram showing a usage example of the above.

FIG. 6 is an explanatory diagram showing another usage example of the same.

7 is a vertical front view of a conventional hydraulic motor taken along line 7-7 in FIG.

FIG. 8 is a right side view of the above.

FIG. 9 is an explanatory diagram of a positional relationship between the displacement mechanism and the valve mechanism at the start of the operation of the above.

FIG. 10 is an explanatory diagram of a positional relationship between the displacement mechanism and the valve mechanism after the start of the operation of the above.

FIG. 11 is an explanatory diagram of a positional relationship between the displacement mechanism and the valve mechanism after the above.

FIG. 12 is an explanatory diagram showing a usage example of the above.

[Explanation of symbols]

 1 input means 2 inlet port 3 outlet port 4 input shaft 5 output means 6 internal tooth member 7 rotary valve member 8 external tooth member 9 stationary valve member 10 displacement mechanism 11 valve mechanism 12 connecting shaft 13 volume change chamber 14 first end cap 16 Casing 17 2nd end cap

Claims (1)

[Claims] 1. An output means comprising: an input means having an input shaft provided with an inlet port and an outlet port; and an output means having a casing concentrically and rotatably assembled to the input means. Is provided with an internal tooth member and a rotary valve member, and an external tooth member meshing with the internal tooth member is provided in the internal tooth member, and a valve for switching the flow of fluid in cooperation with the rotary valve member is provided on the input shaft. A hydraulic motor comprising: a stationary valve member which constitutes a mechanism; and a connecting shaft which connects an external tooth member to an input shaft so as to revolve but not rotate.