JPH0596470U - Hydraulic motor with clutch mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to selectively engage and disengage the output shaft and the driven shaft of the hydraulic motor. In a hydraulic motor, a driven shaft (18) and a hollow rotary shaft (13) with a built-in output shaft (2) are spline-engaged at their ends, and the hollow rotary shaft (13) is inside a casing (7). It is slidable in the axial direction with a pressure oil introduction part provided in both end spaces of the hollow rotary shaft (13).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a hydraulic motor, and more particularly to an improvement of a hydraulic motor having a clutch mechanism for selectively engaging and disengaging an output shaft and a driven shaft of the hydraulic motor.

[0002]

[Prior Art]

 Recently, hydraulic motors are increasingly used as driving motors for industrial vehicles or driving motors for winches, etc.When using hydraulic motors for these purposes, the motor and the driven body must be separated from each other. A clutch mechanism that selectively engages and disengages is essential.

[0003]

[Problems to be solved by the device]

 Conventionally, an independent clutch is provided between the hydraulic motor and the wheels or drums, which lengthens the axial length, and solves the mounting space problem especially when used as a traveling motor. It was indispensable to do so, and it also inevitably suffered from problems such as increased weight.

[0004]

[Means for Solving Problems]

 The hydraulic motor with a clutch mechanism of the present invention is arranged at the inner end portion of the casing, the rotor having outer teeth is disposed in the ring having inner teeth, and the rotatable distribution valve is provided in the casing to Oil is supplied to and discharged from the space with the casing, and the output shaft, which has external teeth that mesh with the internal teeth of the rotor, extends in the hollow space of the hollow rotary shaft that is integral with the distribution valve, and its inner surface is spline meshed. Furthermore, in a hydraulic motor in which the driven shaft is connected on the same axis at the opposite end of the hollow rotary shaft, the driven shaft and the hollow rotary shaft spline-engage at the end and the hollow rotary shaft Is slidable in the casing in the axial direction, and a pressure oil introduction part is provided in the space on both ends of the hollow rotary shaft to selectively supply and discharge the pressure oil, so that the driven shaft and the hollow rotary shaft are separated. Engage the spline mesh between , Characterized in that it allowed to withdrawal.

[0005]

【Example】

 Hereinafter, description will be given according to the embodiments shown in the drawings. Reference numeral 1 denotes an end lid, and a pressure port 2 communicating with a pressure chamber formed on the output shaft side of a hollow rotary shaft, which will be described later, is provided at the center.

Reference numeral 3 denotes a hydraulic motor section, which includes a casing 4 and a rotor 5. A distribution valve 6 is integrally formed on the outer peripheral surface of a hollow rotary shaft described later. A casing 7 has an oil passage 8 communicating with the hydraulic motor unit 3 by casing, and a fluid inlet 9 and a fluid outlet 10 are provided in the casing 7, respectively, and the ports 9 and 10 are not shown. Connected to hydraulic power source.

Then, the pressure oil supplied from the inflow port 9 is supplied to the hydraulic chamber 11 formed between the oil pressure motor section 3 and the casing 4 via the distribution valve 6 and the oil passage 8. Further, the pressure oil in the oil pressure chamber 11 is discharged from the outflow port 10 via the oil passage 8 and the distribution valve 6 to rotate the rotor 5.

Reference numeral 12 is an output shaft, one end of which meshes with the rotor 5 of the hydraulic motor unit 3. Reference numeral 13 denotes a hollow rotary shaft that is oil-tightly fitted in the casing 7 described above. A hole 14 is provided on the output shaft 12 side, and an inner spline 15 or the like slides on the inner peripheral surface of the hole 14. An engaging portion is formed.

The sliding engagement portion is adapted to be slidably engaged with an outer spline or the like formed on the other end of the output shaft 12.

A sliding engagement portion such as the spline 17 or the inner spline shown in the drawing is formed at the end of the hollow rotary shaft 13 on the side opposite to the output shaft 12, and the sliding engagement is performed. The portion is adapted to be selectively engaged and disengaged by sliding of the hollow rotary shaft 13 and an engaging portion such as an inner spline 19 or an outer spline formed at the end of the driven shaft 18 shown in the drawing. It forms the clutch mechanism.

Reference numeral 20 denotes a pressure chamber formed on the output shaft 12 side of the hollow rotary shaft 13 and connected to a hydraulic pressure source 22 via the pressure port 2 and a direction switching valve 21. Reference numeral 23 denotes a pressure port provided in the casing 7, which communicates with a pressure chamber 24 formed on the opposite side of the output shaft 12 of the hollow rotary shaft 13 and is connected to a hydraulic pressure source 22 via the direction switching valve 21. There is.

Therefore, the pressure oil is selectively supplied to the pressure chamber 20 and the pressure chamber 24 by switching the direction switching valve 21, and by supplying the pressure oil to the pressure chamber 20 side, the hollow type The rotary shaft 13 is slid to the left in the drawing, the outer spline 17 and the inner spline 19 are engaged with each other, the rotation of the output shaft 12 is transmitted to the driven shaft 18, and pressure oil is supplied to the pressure chamber 24 side. Then, the hollow rotary shaft 13 is slid to the right in the drawing to disengage the outer spline 17 and the inner spline 19 from each other, thereby cutting off the connection between the output shaft 12 and the driven shaft 18.

Reference numeral 25 denotes a mounting flange provided at the end of the driven shaft 18 to which a wheel or drum (not shown) is mounted. A fixed hub 26 is rotatably mounted via a driven shaft and a bearing 27.

[0014]

[Effect of the device]

 According to the present invention, the so-called spline sliding part of a so-called gerotor type hydraulic motor can be used as it is, the hollow type rotating shaft can be slid in the axial direction, and only the spline and the hydraulic part need to be added. The clutch mechanism can be obtained with almost no increase, and the hydraulic motor with the clutch mechanism can be manufactured in a small size and a light weight.

[0015]

[Brief description of drawings]

FIG. 1 is a front sectional view showing an example of a hydraulic motor with a clutch mechanism of the present invention, showing an engaged state of a clutch portion in an upper half portion and a disengaged state of the clutch portion in a lower half portion.

FIG. 2 is a side sectional view taken along the line II of FIG.

[Explanation of symbols]

 3: Hydraulic motor 7: Casing 12: Output shaft 13: Hollow rotary shaft 14: Hole 15: Spline (sliding engagement portion) 16: Spline (engagement portion) 17: Outer spline (sliding engagement portion) 18 : Driven shaft 19: Inner spline (engagement part)

Claims (1)

[Scope of utility model registration request] A rotor with external teeth is arranged in a link with internal teeth arranged at the inner end of the casing, and a rotatable distribution valve is provided in the casing to supply and discharge oil to and from the space between the ring and the casing. The output shaft having outer teeth that mesh with the inner teeth of the rotor extends through the hollow portion of the hollow rotary shaft integral with the distribution valve and is spline-engaged with the inner surface of the hollow rotary shaft. In a hydraulic motor in which a driven shaft is connected on the same axis at an end opposite to a driving side, the driven shaft and the hollow rotary shaft are spline-engaged at an end, and the hollow rotary shaft is axially arranged in a casing. Slidably, and provided with a pressure oil introduction part in both end space parts of the hollow rotary shaft,
A hydraulic motor with a clutch mechanism, wherein a spline engagement between a driven shaft and a hollow rotary shaft is engaged and disengaged by selectively supplying and discharging pressure oil.