JP3051239B2 - Hydraulic motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIGS. 7 and 8 show well-known typical examples of this type, and these will be briefly described with reference to the drawings.
The hydraulic motor C includes an input means 101, a shaft support casing 1
02, a displacement mechanism 103, a stationary valve member 104, an output shaft 111, and a rotary valve member 123. Then, the displacement mechanism 103 includes the internal tooth member 10
7, an external tooth member 108 having one less number of teeth is eccentrically disposed, and a volume that expands and contracts due to the relative movement and the rotational movement between the internal tooth member 107 and the external tooth member 108 A change chamber 109 is formed.

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

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 a flow path 120 and an output shaft 111 of the shaft support casing 102. A flow path 121 provided on the valve surface of the valve member 123
It has come to communicate with.

The operation of this type of fluid motor is generally known to those skilled in the art. The high-pressure oil supplied from the inlet port 105 passes through the rotary valve member 123 and the stationary valve member 104, and passes through the volume change chamber of the displacement mechanism 103. The external tooth member 108 rotates while revolving within the internal tooth member 107 under the pressure, and at this time, the rotary valve member 123 also rotates to switch the valve between the stationary valve member 104 and the rotary valve member 123. , The volume change chamber 109 on the low pressure side of the displacement mechanism 103
The return 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) and the valve members 104 and 123 (lower) 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 portions indicate the inlet port 10.
5 is on the high pressure side, and the rest is
Are shown on the low pressure side respectively. FIG. 10 shows the case where the external tooth member 108 makes 1/14 rotation, and FIG. 11 shows the case where the external tooth member 108 makes 1/7 rotation.

[0006] In this way, the external tooth member 108 is connected to the internal tooth member 107.
Once it has revolved six times inside, it rotates once, and as a result, the conduction axis
One complete rotation 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 switching of the valve is performed in this manner. This is a case where the port 105 is used as an outlet port, and conversely, when the port 106 is used as an inlet port, the flow is reversed.

[0007]

FIG. 12 shows an example in which the hydraulic motor C as described above is used for driving the winch drum 122. The power of the output shaft is projected from the shaft support casing 102. Since the hydraulic motor C and the winch drum 122 are supplied in parallel with each other, the overall axial length is increased. On the other hand, recently, there has been an increasing demand for reducing such a device. However, the use of the hydraulic motor C as described above has a problem that such a requirement cannot be satisfied and the size cannot be reduced because the axial length is long. Such a problem is caused by the fact that the output shaft 111 (the reference numeral is a conventional example described with reference to FIGS. 7 to 11) and the displacement mechanism 103 are provided in the shaft support casing 102 in series in the axial direction. Is projected from the shaft support casing 102.

Therefore, the present invention solves the above-mentioned problems of the conventional hydraulic motor, shortens the axial length, further reduces the number of parts, and downsizes equipment using the same. The purpose is to provide a hydraulic motor that can meet such demands.For that purpose, the ingenuity has been repeated, the conventional common sense has been changed, and the casing provided with the displacement mechanism has been stationary. Instead of doing so, it was possible to achieve such an object by making it rotatable and using this as output means.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an input means having an input shaft provided with an inlet port and an outlet port, and is rotatable concentrically with the input means. Output means having a casing mounted on the input means, wherein the output means is provided with an internal tooth member and a rotary valve member, and inside the internal tooth member, an external tooth member meshing therewith is provided, and an input shaft is provided on the input shaft. Is provided with a stationary valve member constituting a valve mechanism for switching the flow of fluid in cooperation with the rotary valve member, and further provided with a connecting shaft connecting the input shaft so that the external tooth member revolves but does not rotate. The output means is rotated via the internal tooth member by the revolution of the external tooth member.

[0010]

In the hydraulic motor of the present invention as described above,
High-pressure oil flowing from the input port of the input shaft of the input means
After flowing 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, it revolves the external tooth member and rotates the internal tooth member, and outputs high torque from the output means provided with this. This rotation causes the rotary valve member to rotate integrally with the internal gear member, thereby switching the valve between the stationary valve member and the stationary valve member. And while doing so, 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]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention shown in FIGS. 1, 2, 3, and 4, description of the same parts as those of the conventional hydraulic motor will be omitted, and different points will be mainly described. Reference numeral 1 denotes an input means having an input shaft 4 provided with an inlet port 2 and an outlet port 3. An output means 5 is mounted concentrically and rotatably on the input means 1, and the output means 5 It has a casing 16, an internal tooth member 6 and a rotary valve member 7. 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 constituting the valve mechanism 11 is formed, and further, a connecting shaft 12 is provided for connecting the external tooth member 8 to the input shaft 4 so as to revolve but not rotate. ing.

The output means 5 is the first from the left 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.
The casing 16, the internal tooth member 6, and the second end cap 17 are connected to each other by a first bolt 23. Both teeth members 6, 8
, An external tooth member 8 having one less tooth is eccentrically disposed in the internal tooth member 6, and a volume change chamber 13 is formed between both tooth members 6, 8. . An internal spline 18 is provided on the inner periphery of the external tooth member 8, and an external spline 19 formed at one end of the connection shaft 12 meshes with the internal spline 18, and an external 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 flow paths 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. Channel 28
And the flow path 28 of the rotary valve member 7
It is designed to communicate with 29.

In the above-mentioned hydraulic motor, the displacement mechanism 10 and the valve mechanism 11 are basically the same as those of the conventional one, and the high-pressure oil flowing from the inlet port 2 of the input shaft 4 of the input means 1 is After flowing into the displacement chamber 13 on the high pressure side of the displacement mechanism 10 via the casing 16, the stationary valve member 9, and the rotary valve member 7, the external tooth member 8 which is non-rotatably mounted on the input shaft 4 by the pressure is moved inside. The orbit is made to revolve in the tooth member 6, and when the number of revolutions becomes six, the internal tooth member 6 rotates once, and a high torque is output from the output means 5 provided with this. By this rotation, the rotary valve member 7 rotates integrally with the internal gear member 6, and
The valve is switched between the stationary valve member 9 and the displacement mechanism 10.
Is returned from the outlet port 3 of the input shaft 4 through 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) and the valve mechanism 11 (lower) when the operation of the hydraulic motor is started, that is, when the internal gear member 6 is at the zero position, in the above case. In the flow paths of the members 7 and 9, the hatched portions indicate 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 internal tooth member 6
FIG. 14 shows the case where the internal tooth member 6
Respectively show the case where it has rotated 1/7. Thus, the internal tooth member 6 rotates once when the external tooth member 8 revolves six times in the internal tooth member 6, and as a result, the output means 5 rotates once in the direction of the arrow.

FIGS. 5 and 6 show the above-mentioned hydraulic motor A used for driving the winch drum 122. The hydraulic motor A is as described above, and the casing is connected to the output means 5. As a result, the output means 5 can be built in the winch drum 122. As a result, the length in the axial direction can be reduced, and the overall size can be reduced. FIG. 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 winch drum 122 is used as the output means 5 of the hydraulic motor A itself.

[0015]

The present invention is as described above, wherein an input means having an input shaft provided with an inlet port and an outlet port is provided with output means having a casing concentrically and rotatably mounted. By changing the common sense so far, an internal gear member and a rotary valve member are provided in the output means, an external gear member meshing with the internal gear member is provided in the internal gear member, and a rotary valve member is provided in the input shaft. A stationary valve member connected to an input shaft for switching the flow of fluid in cooperation with the apparatus, and a connecting shaft connected to the input shaft so as to revolve the external teeth member but not rotate, and further provide a casing; Since the internal tooth member and the rotary valve member are used as output means as they are, the conventional hydraulic motor has been separated from the above members and the output means. That the size of Eliminate the problem, yet also reducing the number of parts can be reduced in size, thus there is an effect that the equipment is installed it can be miniaturized.

[Brief description of the 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 a displacement mechanism and a valve mechanism at the start of the operation of the above.

FIG. 3 is an explanatory diagram of a positional relationship between a displacement mechanism and a 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, which are further behind 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 above.

FIG. 7 is a vertical sectional front view of the conventional hydraulic motor taken along line 7-7 in FIG. 8;

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

FIG. 9 is an explanatory diagram of a positional relationship between a displacement mechanism and a 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 a displacement mechanism and a valve mechanism, which is further behind 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 Second end cap

Claims (1)

(57) [Claims] 1. An input means having an input shaft provided with an inlet port and an outlet port; and output means having a casing concentrically and rotatably mounted on the input means, wherein the output means includes: An internal gear member and a rotary valve member are provided. An external gear member meshing with the internal gear member is provided in the internal gear member. A valve mechanism is provided on the input shaft for cooperating with the rotary valve member to switch fluid flow. A stationary valve member is provided,
A hydraulic motor, further comprising a connecting shaft connected to an input shaft for revolving the external tooth member but not rotating, and rotating the output means via the internal tooth member by the revolution of the external tooth member. .