JPH082523Y2 - Transmission oil pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an oil pump device for feeding lubricating oil to a gear transmission.

(Prior Art) Conventionally, a power train has been used in which the output of the engine is shifted and output by a gear transmission via a clutch device. In the above transmission, each part of the gear transmission mechanism is used. It is necessary to feed the oil by an oil pump to ensure lubricity.
As seen in Japanese Patent Publication No. 57-51865, a structure in which this oil pump is arranged inside a transmission is known.

It has also been considered to dispose an oil pump for the above-mentioned transmission at the joint between the clutch housing and the transmission casing.

(Problems to be solved by the invention) However, when the oil pump is arranged facing the inside of the clutch housing as described above, the oil leaked from the cover portion of the oil pump enters the clutch device, There is a possibility that the normal operation of this clutch device may be hindered.

That is, in the oil pump, the oil is sucked and pressurized by the number of revolutions and discharged to the main shaft portion, etc., but the oil seal on the mating surface of the oil pump is in a good state for a long time. It is difficult to ensure that the oil leaks, and it is inevitable that oil leakage will occur, and the oil that leaks adheres to the frictional portion of the clutch device, which causes slippage, and must be avoided.

In view of the above circumstances, the present invention has an object to provide an oil pump device for a transmission that prevents oil from entering the clutch device and allows an oil pump to be installed between the oil pump and the transmission casing. is there.

(Means for Solving the Problem) In order to achieve the above object, an oil pump device of the present invention is provided with a clutch housing for housing a clutch device on an extension line of a counter shaft supported by a transmission casing for housing a transmission. An integrally formed fastening wall with the transmission casing is formed to swell inwardly, and a power transmission shaft such as a counter shaft is provided in a space formed between the swollen fastening wall and the end surface of the transmission casing. It is configured by disposing a driven oil pump.

(Operation) In the oil pump device as described above, the oil pump is arranged in the space surrounded by the transmission casing and the clutch housing, and even if the oil leaks from the oil pump, the oil invades into the inside of the clutch housing. Is to be prevented by the clutch housing, and the oil pump is arranged by effectively utilizing the space without hindering the operation of the clutch device.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First
FIG. 1 shows a sectional structure of a main part of a power transmission mechanism to which an oil pump device according to an embodiment of the present invention is applied, FIG. 2 shows a detailed sectional structure of an oil pump portion, and FIG. 3 shows a front structure thereof. .

A clutch housing 4 that houses a clutch device 3 is fastened to one end of a transmission casing 2 that houses a manual gear transmission 1.

The clutch device 3 includes a flywheel 6 to which an engine output is input, and a clutch shaft 7 is arranged concentrically with the flywheel 6 so that power transmission between the flywheel 6 and the clutch disk 8 is transmitted to the flywheel 6. This is performed by switching the pressure contact state of the pressure plate 9. The pressure contact is performed by using, for example, a diaphragm spring 10 to bring the power to a power transmission state, and the release mechanism (not shown) releases the pressure contact in response to the operation of the clutch pedal to obtain a clutch function to bring the power to a power cut state. is there. The clutch device 3 is housed in a clutch housing 4 which is open on the engine side.
Penetrates and is supported by the transmission casing 2 via a bearing 11 and is extended inside.

A main shaft 15 is concentrically arranged at the rear end of the clutch shaft 7, and a counter shaft 16 is supported by the transmission casing 2 via a bearing 17 in parallel with the main shaft 15. Drive gear 18 and counter driven gear 19 at the end of the clutch shaft 7
The count shaft 16 is driven by meshing with the counter shaft, and the gears 22a and 22b rotatably mounted on the main shaft 15 that constantly meshes with the counter gears 21a and 21b of the gears of the count shaft 16 always rotate. Has been done. A known mechanism is provided in which the gears 22a and 22b are selectively fastened to the main shaft 15 by the synchronizing mechanism 23 to obtain a predetermined gear ratio. An oil passage 24 is formed inside the main shaft 15 and serves as a synchronizing mechanism.
23 is configured to supply lubricating oil to the gear mesh portion.

The oil pump 27 that supplies oil to the oil passage 24 of the main shaft 15 is provided with the counter shaft 16
It is arranged in a space surrounded by the transmission casing 2 and the clutch housing 4 at the tip of the drive shaft, and is driven by the counter shaft 16.

That is, the oil pump 27 is arranged below the clutch shaft 7 on the extension line of the front end of the counter shaft 16, and the inter housing 28 is installed in the front surface portion of the transmission casing 2. An oil pump 27 is formed on the. This inter housing 28 is the clutch shaft 7
It extends downward from the periphery of the bearing 11 that supports the shaft and extends around the bearing 17 that supports the counter shaft 16. The pump shaft 31 of the oil pump 27 is fitted in the inter housing 28. The base end portion 31a of the pump shaft 31 is linked to the tip end portion 16a of the counter shaft 16 by the engagement of the groove and the projection, and the rotational force of the counter shaft 16 is transmitted and driven.

An inner rotor 32 of an oil pump 27 is fixed to the pump shaft 31, an outer rotor 33 is arranged on the outer periphery of the inner rotor 32, and both rotors 32, 33 are covered by a pump cover 3
Covered by 4. Corresponding to the pump action obtained between the inner rotor 32 and the outer rotor 33 with respect to the rotation of the pump shaft 31, the inter-housing 28 has a suction port 35 on the negative pressure side and a discharge port on the pressurization side.
36 are formed.

The oil from the oil strainer 37 installed in the lower portion of the transmission casing 2 is introduced into the intake port 35 through the intake pipe 38 and from the intake port 39 (see FIG. 3) formed in the inter-housing 28 to the intake port. 35
Connected to. Incidentally, the transmission casing 2
The oil level on the center line of the counter shaft 16
The amount of oil to be OL is injected.

On the other hand, the discharge passage 41 connected to the discharge port 36 of the oil pump 27 extends to the outer peripheral portion of the upper clutch shaft 7 and communicates with the oil supply passage 42 of the clutch shaft 7 via the annular groove 43 and the through hole 44. The clutch shaft 7
The oil is supplied from the nozzle 45 connected to the rear end of the oil supply passage 42 to the oil passage 24 in the main shaft 15. Further, a relief passage 47 is branched in the middle of the discharge passage 41 extending from the discharge port 36, and a relief valve 48 is interposed in the relief passage 47 to regulate the upper limit of the discharge pressure with respect to the rotation increase of the counter shaft 16. Is configured. Although not shown, the relief oil in the relief passage 47 has a passage formed therein so as to be collected in the transmission casing 2.

In contrast to the above-described installation of the oil pump 27, the fastening portion of the clutch housing 4 to the transmission casing 2 swells inward so as to cover the inter-housing 28 and the pump cover 34 of the oil pump 27, and the shielding wall 4a is formed. The oil pump is formed integrally with the clutch housing 4 in the outer peripheral portion, and is provided in a space formed between the shielding wall 4a and the end surface of the transmission casing 2.
27 is provided. In addition, at the center of the shielding wall 4a, along the outer peripheral portion of the clutch shaft 7,
50 is connected via an oil seal 51.

According to the configuration of the above embodiment, the oil pump 27 is arranged in the space between the end surface of the transmission casing 2 and the shielding wall 4a of the clutch housing 4, and the oil pump 27
For example, even if oil leaks from the contact portion between the pump cover 34 and the inter-housing 2, the shielding wall 4a prevents the oil from entering the clutch device 3, particularly the clutch disc 8. Further, the pump shaft 31 of the oil pump 27 is directly driven by the end portion of the counter shaft 16 so that the driving mechanism is simple and the oil pump 27 can be arranged by effectively utilizing the space of the clutch housing 4. Is.

Although the oil pump 27 is directly driven by the counter shaft 16 in the above embodiment, it may be driven by another power transmission shaft such as the clutch shaft 7 and the main shaft 15. .

(Effects of the Invention) According to the present invention as described above, the oil pump is provided in the space formed between the end wall of the transmission casing and the engagement wall formed inwardly of the clutch housing on the extension line of the counter shaft. By arranging the motor and driving it by the power transmission shaft, even if the oil leaks from the oil pump, it is possible to prevent the oil from entering the inside of the clutch housing, which hinders the operation of the clutch device. The oil pump can be installed without using the space effectively.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a power transmission mechanism to which an oil pump device according to an embodiment of the present invention is applied, FIG. 2 is a detailed sectional view of an oil pump portion, and FIG. 3 shows a clutch housing and a pump cover removed. It is a front view of a transmission casing in a state. 1 ... transmission, 2 ... transmission casing,
3 ... Clutch device, 4 ... Clutch housing, 4a ...
… Shielding wall, 7 …… Clutch shaft, 15 …… Main shaft, 16 …… Counter shaft, 24 …… Oil passage, 27
…… Oil pump, 28 …… Inter housing, 31 ……
Pump shaft, 32, 33 ... Rotor, 34 ... Pump cover, 35 ... Suction port, 36 ... Discharge port, 41 ... Discharge passage, 42 ... Oil supply passage.

Claims (1)

[Scope of utility model registration request] 1. A coupling wall integrally formed with a clutch housing for accommodating a clutch device and extending inwardly on an extension of a counter shaft supported by a transmission casing accommodating a transmission. An oil pump device for a transmission, wherein an oil pump driven by a power transmission shaft is disposed in a space formed between the bulged fastening wall and an end surface of the transmission casing.