JPH089482Y2 - Transmission oil level gauge mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an oil level gauge mounting structure for a transmission, and in particular, accurately measures the amount of oil and is advantageous in terms of space. Regarding mounting structure.

[Prior Art] In a vehicle, a transmission is interposed between an internal combustion engine and driving wheels. This transmission changes the driving force of the driving wheels and the traveling speed in accordance with the traveling condition of the vehicle that changes over a wide range, and thus the performance of the internal combustion engine is fully exhibited. The transmission includes a drive-side pulley (primary pulley) including a drive-side fixed pulley portion fixed to the drive-side shaft and a drive-side movable pulley portion attached to the drive-side fixed pulley portion so that the drive-side fixed pulley portion is detachable from the drive-side fixed pulley portion. A driven pulley (secondary pulley) including a driven fixed pulley section fixed to the driven shaft and a driven movable pulley mounted on the driven fixed pulley so that the driven pulley can be moved toward and away from the driven fixed pulley. It has a belt wound around a driving side pulley and a driven side pulley, and reduces the groove width between both pulley part pieces to reduce the radius of gyration of the belt wound around both pulleys to change the gear ratio. There is a continuously variable transmission (CVT) for vehicles that controls gear shifting accordingly.

In the continuously variable transmission for a vehicle, oil is supplied for hydraulic pressure to a hydraulic control mechanism and lubrication of each part. This measurement of the oil amount is normally performed during startup of the internal combustion engine (idling speed Ne = 700 to 800 rpm) in order to fill the hydraulic circuit with oil and stabilize the oil level.

By the way, in the case of a continuously variable transmission, the lubricating oil is scattered during the rotation of the belt, so it is necessary to pay attention to the place where the oil level gauge is arranged.

[Problems to be solved by the invention]

However, in the conventional continuously variable transmission, as shown in FIG. 4, the rear portion (secondary side) of the continuously variable transmission 104 connected to the internal combustion engine 102 opposite to the vehicle front F side and having a small number of rotating bodies. The oil level gauge 106 was arranged in the above to prevent oil from adhering to the oil level gauge 106 due to oil splashing, but the oil must be supplied from the rear part,
There is a disadvantage that the workability and maintainability of refueling are reduced. In FIG. 4, reference numerals 108 and 108 are front wheels.

Further, as shown in FIG. 5, one end of a filler tube 112 is welded to an oil pan 110 below the continuously variable transmission 104, and a gauge insertion chamber 114 of an oil level gauge 106 is separately formed to prevent oil scattering. However, there is a suction port of an oil pump (not shown) near the oil pan 110, and the negative pressure of this suction port affects the oil level L of the gauge insertion chamber 114, so that the oil Since the level L is not stable and the oil level cannot be measured accurately, and the filler tube 112 is protruding to the front F of the vehicle, the mounting space becomes large and the space in the engine room becomes small, resulting in space reduction. There is an inconvenience. In FIG. 5, reference numeral 116 is a drive shaft.

Furthermore, as a transmission equipped with an oil level gauge,
For example, it is disclosed in Japanese Utility Model Publication No. 61-24573. However, the one described in this publication is disadvantageous in terms of space because the oil level gauge projects in front of the oil pan, as in the above.

[Purpose of device]

Therefore, an object of the present invention is to provide a first transmission case that supports one end portion of the drive side shaft on the internal combustion engine side in order to eliminate the above-mentioned inconvenience, and to connect the first transmission case to the drive side shaft. A second transmission case supporting the other end portion is provided, and a rear side of the drive side fixed pulley section piece of the drive side shaft is provided on a front wall of the vehicle front side and a stepped portion at an upper portion on an image wall of the first transmission case. A recess is formed by the portion, and one end of the filler tube is directly attached to the first transmission case so that the oil level gauge can be inserted into the recess, and the other end of the filler tube is attached to the first transmission case. The oil level gauge is detachably installed on the filler tube at the front so that the oil level can be measured at a stable oil level without the influence of oil splashing and the oil level can be adjusted. Accurate measurement , Components such as the oil level gauge while avoiding overflowing the front of the vehicle and space-effective, yet in realizing the oil level gauge mounting structure of a transmission capable of improving the lubrication workability and maintainability.

[Means for solving problems]

In order to achieve this object, the present invention is directed to a drive-side pulley including a drive-side fixed pulley portion fixed to a drive-side shaft and a drive-side movable pulley portion attached to the drive-side fixed pulley portion so that the drive-side fixed pulley portion is attachable and detachable. A driven side fixed pulley part fixed to the driven side shaft and a driven side movable pulley part mounted on the driven side fixed pulley part so that the driven side fixed pulley part is detachable from the driven side fixed pulley part; Side pulley and the belt wound around the driven side pulley, the groove width between the both pulley part pieces is increased to reduce the radius of gyration of the belt wound around the two pulleys, and the gear ratio In a transmission in which gear change control is performed to change the drive side shaft, a first transmission case that supports one end of the drive side shaft on the internal combustion engine side is provided, and the first transmission case is connected to the first transmission case and the other side of the drive side shaft is provided. The second transmission case supporting the end portion is provided to drive the drive. A recess is formed in the front wall of the vehicle front side on the rear side of the drive-side fixed pulley portion of the shaft on the front side of the vehicle and on the upper portion by a step portion, and the first transmission case is formed. Is provided with one end of a filler tube directly attached so as to insert an oil level gauge into the recess, and the other end of the filler tube is provided with the front end of the first transmission case being directed upward. The oil level gauge is detachably attached to the filler tube.

[Action]

According to the configuration of the present invention, the driving-side fixed pulley portion piece, the fixed-side movable pulley portion piece, and the belt rotate,
A large amount of oil scatters in the radial direction of the drive-side fixed pulley part and the fixed-side movable pulley part, but the drive-side fixed pulley part is fixed to the drive-side shaft and the image of the first transmission case is Since a recess is formed on the wall in the front part on the front side of the vehicle and in the upper part by a step, the drive-side fixed pulley part serves to shield the oil and is affected by the splashing oil. Never. Therefore, since the oil level gauge is arranged at a position where the oil level is stable, the oil level can be accurately measured. Further, the oil level gauge does not protrude to the front of the vehicle, which saves space and enables effective use of the engine room. Furthermore, since the oil level gauge is arranged on the back side of the drive side fixed pulley part,
The refueling workability and maintainability can be improved. Furthermore, since the oil level gauge is provided at the front of and above the transmission, maintenance and inspection is facilitated.

〔Example〕

Embodiments of the present invention will be described in detail and specifically below with reference to the drawings.

1 to 3 show an embodiment of this invention.
In the figure, 2 is an internal combustion engine and 4 is a continuously variable transmission (CVT).
(Hereinafter simply referred to as "transmission"). This transmission 4
Is capable of coming into contact with and separating from the drive-side fixed pulley part 8 fixed to the drive-side shaft (primary shaft), that is, movable in the axial direction of the drive-side shaft 6 and not rotatable. A drive side pulley (primary pulley) 12 consisting of a drive side movable pulley section piece 10 attached to a drive side fixed pulley section piece (not shown) fixed to a driven side shaft (secondary shaft) and this driven side. It has a driven side pulley (secondary pulley) consisting of a driven side movable pulley part mounted on the fixed pulley part so as to be able to come into contact with and separate from it, and a belt 14 wound around the driving side pulley 10 and the driven side pulley. A belt wound around the pulleys by increasing the width of the groove 16 between the pulley pieces.
The gear shift control is performed so as to decrease and increase the turning radius of 14 and change the gear ratio.

One end of the drive side shaft 6 on the internal combustion engine 2 side is supported by the first transmission case 18, and the other end of the drive side shaft 6 is connected to the second transmission case 20 connected to the first transmission case 18. It is rotatably supported. The other end of the drive side shaft 6 is
It projects from the second transmission case 20 and is covered by a side cover 22.

An oil pump 24 is attached to one end of the drive shaft 6.

A housing 28 is fixed to the other end of the drive-side shaft 6 and forms a working hydraulic chamber 26 in cooperation with the back surface 10a of the drive-side movable pulley portion 10. Also this housing
28 is held from the outside by a rotation detection gear 32 which is a rotation side member of the rotation speed detection mechanism 30.

As shown in FIG. 1, the working oil pressure chamber 26 is supplied with working oil (indicated by an arrow) for actuating the driving side movable pulley part 10 through an oil passage 34 formed in the axis of the driving side shaft 6. It

Oil is supplied into the transmission 4 in order to apply the hydraulic pressure of the hydraulic control mechanism and to lubricate the belt 14 and other parts.

Therefore, in order to measure the amount of this oil,
As shown, an oil level gauge 36 is provided. The oil level gauge 36 is, as shown in FIGS. 1 and 2, on the rear surface 8a side of the drive side fixed pulley portion 8 and on the vehicle front F side.
Moreover, the front part of the first transmission case 18 and the upper part of the drawing wall
It is arranged at the gauge mounting position A of the recess 38 formed by the step portion 18a of 18c.

Further, as shown in FIGS. 2 and 3, the oil level gauge 36 has one end directly attached to the first transmission case 18 and the other end directed toward the front of the first transmission case 18 and upward. Transmission 4 covered with filler tube 40
Is pointing upwards at the front of the.

The oil level gauge 36 is attached to the drive side fixed pulley part 8
The reason why the rear side 8a of the vehicle is located on the front side F of the vehicle is as follows.

In the transmission 4 having an oil pump, a hydraulic circuit (not shown), and the like, attention must be paid to the oil level in order to prevent a decrease in hydraulic pressure due to the intake of air by the oil pump 24. Therefore, the amount of oil is measured while the internal combustion engine 2 is being started while the hydraulic circuit is being filled with oil and the oil level is stable, and the oil supply (through the level gauge hole) is being performed during starting of the internal combustion engine 2. The oil level gauge 36 must be installed at the internal combustion engine 2
Must be installed at a position where safe measurement and supply work can be performed during the start of the engine, and at a position where the oil level gauge 36 can be prevented from splashing oil and the amount of oil can be accurately measured. There must be. Therefore, the position of the oil level gauge 36 is most suitable at the position where the oil does not scatter in the front part of the transmission 4 in terms of workability of refueling.

Further, in the case of the transmission (CVT) 4, due to its layout, the drive side shaft 6 is present in the front part of the transmission 4, but since the belt 14 is wound around, the lubricating oil is easily scattered. It is inappropriate to dispose the oil level gauge 36 in the vicinity thereof, and there is no space in the vicinity of the drive side movable pulley section piece 10 because the drive side movable pulley section piece 10 moves.

Therefore, the position where the oil level gauge 36 is provided is on the opposite side of the drive side movable pulley section piece 10, that is, on the rear surface 8a side of the drive side fixed pulley section piece 8 where oil is less scattered and in the front part of the transmission 4. Is the best.

 Next, the operation of this embodiment will be described.

In the speed change control of the transmission 4, the width of the groove 16 is reduced by the pressure of the hydraulic oil to the hydraulic pressure chamber 26, and the radius of rotation of the belt 14 wound around the driving pulley 12 and the driven pulley is reduced. Done by.

On the other hand, the oil level in the transmission 4, that is, the amount of oil can be measured by an oil level gauge 36 as shown in FIGS.

By the way, since the oil level gauge 36 is arranged on the rear surface 8a side of the drive side fixed pulley section piece 8 as shown in FIG. 1, the drive side fixed pulley section piece 8 and the fixed side movable pulley section piece 10 are arranged. As the belt and the belt 14 rotate, the oil is removed from the drive side fixed pulley part 8 and the fixed side movable pulley part
Although a large amount is scattered in the radial direction of 10, the drive side fixed pulley portion piece 8 is fixed to the drive side shaft 6, and a recess 38 is formed in the image wall 18c of the first transmission case 18. Therefore, the drive-side fixed pulley piece 8 serves to shield the oil, and the recess 38 is not affected by the scattered oil. Therefore, there is no influence of oil scattering, suction by the oil pump 24, and the like, whereby the oil level becomes stable, and the oil amount can be accurately measured.

Further, since the oil level gauge 36 is located in the front part and above the transmission 4, the oil level gauge 36 does not protrude to the front F side of the vehicle, the layout of the transmission 4 becomes easy, and the engine is The space in the room can be effectively used, which can be advantageous in terms of space.

Further, since the oil level gauge 36 is located in the front part of the transmission 4, refueling becomes easy, and refueling workability and maintainability can be improved.

Furthermore, since the filler tube 40 is directly attached to the first transmission case 18 of the transmission 4, the number of parts can be reduced and the cost can be reduced.

[Effect of device]

As is apparent from the above detailed description, according to the present invention, the first transmission case that supports one end portion of the drive-side shaft on the internal combustion engine side is provided, and the drive-side shaft is connected to the first transmission case. A second transmission case supporting the other end portion is provided, and a rear side of the drive side fixed pulley section piece of the drive side shaft is provided on a front wall of the vehicle front side and a stepped portion at an upper portion on an image wall of the first transmission case. A recess is formed by the portion, and one end of the filler tube is directly attached to the first transmission case so that the oil level gauge can be inserted into the recess, and the other end of the filler tube is attached to the first transmission case. By installing the oil level gauge on the front part in an upward direction and detachably installing the oil level gauge on the filler tube, it is possible to measure the oil level at a place where the oil level is stable and there is no effect of oil scattering, Can be measured accurately Both components such as the oil level gauge is prevented from protruding to the front vehicle may be a space-effective as a space-saving.

Further, since the oil level gauge is arranged on the rear side of the drive side fixed pulley section, on the front side of the vehicle front side of the transmission and in the upper portion, refueling becomes easy, and refueling workability and maintainability are improved. Can be done.

Furthermore, since the oil level gauge is arranged at the front of and above the transmission, maintenance and inspection can be facilitated.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a plan sectional view of a transmission, FIG. 2 is a side view of the transmission, and FIG. 3 is a partial front view of the transmission. 4 and 5 are explanatory views showing a mounting structure of an oil level gauge of a conventional transmission. In the figure, 2 is an internal combustion engine, 4 is a transmission, 6 is a drive side shaft, 8 is a drive side fixed pulley section piece, 10 is a drive side movable pulley section piece, 12 is a drive side pulley, 14 is a belt, and 16 is a groove. , 18 is a first transmission case, 20 is a second transmission case, 24 is an oil pump, 26 is an operating hydraulic chamber, 36 is an oil level gauge, 38 is a recess, and 40 is a filler tube.

Claims (1)

[Scope of utility model registration request] 1. A drive-side pulley comprising a drive-side fixed pulley portion fixed to a drive-side shaft and a drive-side movable pulley portion attached to the drive-side fixed pulley portion so that the drive-side fixed pulley portion can be moved toward and away from the drive-side shaft, and a driven-side shaft. A driven pulley, which includes a driven fixed pulley section fixed to the driven side and a driven movable pulley section mounted on the driven fixed pulley so that the driven movable pulley section is detachable from the driven fixed pulley, and the driven pulley and the driven pulley. A side pulley and a belt wound around the side pulley, and a shift control for changing the gear ratio by decreasing the groove width between the pulley pieces to decrease the radius of gyration of the belt wound around the pulleys. In the transmission, a first transmission case that supports one end of the drive-side shaft on the internal combustion engine side is provided, and a first transmission case that is connected to the first transmission case supports the other end of the drive-side shaft. A two-transmission case is provided, and the drive-side fixed pulley of the drive-side shaft is provided. A recess is formed in the front wall of the vehicle front side on the rear side of the piece on the front side of the vehicle and on the upper portion by a step, and an oil level gauge is formed on the first transmission case. One end of the filler tube is directly attached so as to be inserted into the recess, and the other end of the filler tube is provided so as to be directed upward at the front part of the first transmission case. An oil level gauge mounting structure for a transmission, which is equipped with a removable level gauge.