JPH0646067B2 - Vehicle transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to a front engine front drive (F
F), which is widely used in vehicles of the type F,
The present invention relates to a transaxle type vehicle transmission in which a transmission and a differential mechanism are integrally housed in a transmission case.

[Prior Art] In an FF type automobile, a fluid transmission such as a fluid coupling coaxially connected to an output shaft of an engine, a transmission device coaxially connected to the fluid transmission, and the fluid type A transmission including a differential mechanism provided below the transmission and the transmission and a transmission case that integrally houses these is mounted.

In a transmission equipped with a fluid transmission, in order to fill the fluid in the fluid transmission and cool the fluid transmission, the oil is pumped up from an oil sump in the transmission case with an oil pump. So that the hydraulic oil is supplied to the hydraulic transmission and the hydraulic oil overheated in the hydraulic transmission is discharged into the transmission case so that the hydraulic oil circulates between the hydraulic transmission and the oil sump in the transmission case. Has been

Further, in the above-described transmission for an FF vehicle, in order to drive and connect the transmission and the differential mechanism that are arranged in parallel with each other, a large gear that is meshed with a drive gear provided on the output shaft of the transmission is used. Since a differential ring gear with a large diameter is provided in the differential mechanism, oil easily collects near the differential ring gear in the transmission case.

[Problems to be Solved by the Invention] In the above vehicle transmission, the hydraulic oil is agitated by the high speed rotation of the differential ring gear while the vehicle is traveling at high speed, the oil level becomes unstable, and the oil pump causes air to flow. There is a problem that it is easy to suck and that many bubbles are mixed in the hydraulic oil by stirring.
Since the oil and air are supplied into the fluid transmission by the oil pump, the pressure in the fluid transmission decreases and the flow rate of the operation oil becomes insufficient, resulting in the transmission performance and durability of the fluid transmission. May decrease.

The present invention stabilizes the oil level of the oil sump provided in the transmission case to prevent air from being sucked into the oil pump, and the hydraulic oil discharged from the fluid transmission into the transmission case by the differential ring gear. By preventing agitation, the mixture of air in the hydraulic oil supplied from the oil sump to the fluid transmission by the oil pump can be reduced, and the performance of the fluid transmission can be ensured. For the purpose of providing.

[Means for Solving the Problems] A fluid type transmission device which is coaxially connected to an output shaft of an engine, and a transmission device which is coaxially connected to the fluid transmission device and is capable of at least forward / reverse switching. A differential mechanism that has a differential ring gear that meshes with a drive gear provided on an output shaft of the transmission and that drives a drive shaft that is arranged parallel to the output shaft of the transmission; A transmission for a vehicle, comprising: a transmission case that houses a differential mechanism therein; and a hydraulic oil supply / discharge device that supplies / discharges hydraulic oil to / from the fluid transmission, wherein the hydraulic oil supply / discharge device is the transmission. At the bottom of the case, on the side of the differential mechanism,
An oil sump provided by being separated from the differential mechanism by a partition wall provided in a transmission case, a communication oil passage provided in the partition wall to connect the oil sump and the inside of the transmission case, and the oil. A hydraulic oil supply oil passage communicating with the sump, an oil pump for pumping oil from the oil sump via the hydraulic oil supply oil passage to supply the oil to the fluid transmission, and a hydraulic oil for the fluid transmission. A hydraulic oil discharge oil passage for discharging the oil into the transmission case, and an oil stop member arranged below the transmission case adjacent to the differential ring gear are provided. A discharge oil port, which opens in the transmission case of the hydraulic oil discharge oil passage, and a communication oil path, which opens in the transmission case, in the front portion in the rotation direction of the differential ring gear with respect to the stop member. Provided mouth, it discharged into the transmission case, a transmission for a vehicle which prevents the agitation of the hydraulic oil KyuIri.

[Operation and Effect of the Invention] The hydraulic oil discharged from the fluid transmission into the transmission case is less likely to be agitated because the oil stop member prevents the differential ring gear from moving in the rotating direction, and the bubbles are less mixed. In this state, the oil is accumulated on the front side in the rotational direction of the differential ring gear with respect to the oil stop member, and quickly flows into the oil sump through a communication oil passage provided on the same side with respect to the oil stop member.

Also, the oil sump of the hydraulic oil supply / drainage device is separated from the differential mechanism by the partition wall provided in the transmission case, the hydraulic oil stored in the oil sump maintains a stable oil level, and the oil pump sucks air. Is prevented.

Therefore, the working oil supplied from the oil sump to the fluid transmission by the oil pump contains less air, and the stable performance of the fluid transmission is secured.

EXAMPLES Next, the present invention will be described based on the examples shown in the drawings.

FIG. 2 shows a vehicle transmission according to an embodiment of the present invention,
A hydraulic transmission 1 coaxially connected to an output shaft of an engine, and in the present embodiment, includes an oil pump 17 arranged in the hydraulic transmission 1, and supplies and discharges hydraulic oil to the hydraulic transmission 1. The hydraulic oil supply / drainage device 2, the forward four speed first reverse gear first gear transmission 6 connected to the output side of the hydraulic transmission 1, and the differential mechanism 7 shown in FIG. 3 connected to the output side of the gear transmission. And a transmission case 10 accommodating them. In this embodiment, the transmission case 10 includes a transmission case 10A for accommodating the fluid transmission 1, a transmission case 10B fastened to the transmission case 10A for accommodating the gear type transmission 6, and the transmission case 10A. Differential case 10C integrally formed on the diagonal lower surface
Consists of.

The fluid transmission 1 includes a fluid coupling (fluid coupling) (hereinafter referred to as a coupling) 11, a power cutoff clutch (hereinafter referred to as a clutch) 13 provided inside the radial coupling, and an outer circumference of the coupling. In this embodiment, the engine is composed of a direct coupling clutch 15 provided on the shaft (right in the figure, hereinafter referred to as right shaft) and a servo mechanism 19 for releasing and engaging the clutch 13.

The coupling 11 includes a front cover 111 connected to an input shaft 101 of a transmission connected to a crank shaft of an engine via a drive plate 102, and the front cover 111.
An annular plate-shaped rear cover 110 welded to the outer periphery of 111, and a pump blade 11 provided around the inner wall of the rear cover 110.
3, a turbine blade 114 arranged to face the pump blade, and a turbine shell 115 holding the turbine blade 114. At the center of the front cover 111, a large diameter part on the engine side is a pilot boss 105 that fits into a pilot hole 104 provided at the center of the end surface of the input shaft 101. The left end is the drive shaft of the oil pump 17
106, and a central shaft 108, which is a disc plate holding shaft 107 for slidably supporting the oil pump case 177 of the oil pump 17 in the axial direction and the rotation direction, is provided in the middle. Further, a cylindrical portion 111B having a frictional engagement surface 111A which is orthogonal to the shaft is continuously provided on the outer peripheral portion of the inner wall of the front cover 111. The turbine shell 115
Is connected to the output shaft 103 of the transmission through a clutch 13 which is arranged on the inner ring in the radial direction in the substantially same section as the turbine shell 115 in the axial direction.

The clutch 13 is welded to the hub-shaped portion 116 provided on the turbine shell 115 at the left end, is welded to the disc plate 158 of the clutch 13 at the right end, and has an inner spline 133 formed inside. Clutch plate case 1
34, the first shaft, which is spline-fitted to the output shaft 103 of the transmission 1 coaxially provided with the coupling 11, the hub portion 135, and the inner spline 133 of the clutch plate case 134 at corresponding positions. A clutch hub portion 137 having an outer peripheral spline 136 formed therein, a clutch disc wheel 139 including a disc portion 138 connecting the hub portion 135 and the clutch hub portion 137, and an outer periphery spline-fitted to the clutch plate case 134. A plurality of clutch plates 141 and clutch discs whose inner circumferences are spline-fitted to the drum portion of the clutch disc wheel 139 and which are alternately stacked with the clutch plates 141.
Made with 143.

The direct coupling clutch 15 includes a friction engagement surface 111A formed on the circumferential surface of the front cover 111 and a friction engagement element 159 supported by a direct coupling clutch rear damper plate 158A.

As the oil pump 17, an internal gear pump is used in this embodiment, and the clutch plate and the disc portion of the clutch disc wheel 138 are disposed in the clutch disc wheel 139.
It is provided between and. The oil pump 17 has an outer peripheral portion fixed to the oil pump case 177 and an inner peripheral portion loosely fitted to the small diameter portion 103B of the output shaft 103 of the transmission through an oil seal 175 to form a thrust bearing 176.
A casing 170 abutting against the disc portion 138 of the clutch disc wheel via an internal gear 172 rotatably fitted in a gear room provided with an engine of the casing 170, and the central shaft 108. An external gear 171 fitted with a spline at the tip is connected to an oil passage 103A formed at the center of the output shaft 103, and the working oil sucked from a suction port 173 provided in a casing 170 is supplied to an oil pump case. It discharges from the discharge port 174 formed in 177 and connected between the oil pump case 177 and the front cover 111.

The servo mechanism 19 of the clutch 13 is a connecting rod connected to a clutch pedal provided in the driver's seat or a servo mechanism that operates by automatic supply / discharge of intake pipe negative pressure or hydraulic pressure.
And a pressing rod that is rotated around the fulcrum 193 by the connecting rod.
192, a bearing 195 supported by a flange 194 engaged with the tip 192A of the pressing rod 192, and the bearing 1
95, a sliding sleeve 196 fitted inside, a diaphragm spring 197 whose inner peripheral edge is locked to the right end of the sliding sleeve 196, and a thrust bearing 198 which is engaged with the outer peripheral edge of the diaphragm spring 197.
And a pressing ring 199 for pressing the clutch 13 through the clutch 13 for releasing and sliding the clutch 13 (half clutch).
Is done manually or automatically.

The hydraulic oil supply / drainage mechanism 2 includes the above-described oil pump 17, an oil pan seat 221 formed at the time of casting on the lower surface 10a of the transmission case 10A of the transmission case 10, and an oil pan 22 via a gasket 21 and bolts. By being fastened, the oil screen 23 fastened to the transmission case 10A by bolts inside the oil sump 24 and the oil pan 22 provided at the lower part of the transmission case 10A and on the side of the differential case 10C. And oil reservoir 24 for the hydraulic oil in the transmission case 10A
For connecting to the oil reservoir 24 and the suction port 173 of the oil pump 17 and the communication oil passage 24a provided in the lower side wall 10c of the differential case 10C to open the oil port 242 in the transmission case 10A. A supply oil passage 25, a hydraulic oil discharge oil passage 26 that connects the discharge port 174 of the oil pump 17 and the inside of the transmission case 10A via the inside of the hydraulic transmission 1, and as shown in FIGS. 4 and 5. The step 244a is integrally formed by casting when the differential case 10C is cast, and is provided continuously to the rib R2 of the ridge having a substantially coaxial center with the differential ring gear 72 and provided on the rear side in the rotational direction of the differential ring gear 72 (FIG. 3). , 244b, and the oil stop plate member R1.

The hydraulic oil supply oil passage 25 includes an oil passage 25a that connects the suction port 251 of the oil pump 17 provided in the oil sump 24 and the oil passage 103A,
It comprises an oil passage 103A, an oil passage 103A and an oil passage 25b passing through the suction port 173 of the oil pump 17.

The hydraulic oil discharge oil passage 26 is connected to the discharge port 174 of the oil pump 17.
Oil passage 26a that connects the coupling 11 to the coupling 11 and the coupling
An oil passage 26b that connects the clutch 11 and the clutch 13, and an oil passage 26d between the clutch 13, the sliding sleeve 196, and the output shaft 103.
Oil passage 26c communicating with the oil passage 26c
An oil passage 26 that connects the d and the discharge port 262 of the transmission case 10A.
e, a pipe oil passage 26f which communicates with the discharge port 262, is locked to the transmission case 10A by a clamp 263, and has a tip 264 as a discharge oil port 265.

The gear transmission 6 has a well-known configuration, and the output shaft 103 of the transmission is an input shaft, and the output shaft 61 is a second shaft arranged in parallel with the input shaft.
It has a dog clutch 62 for switching between the first speed and the second speed, a dog clutch 63 for switching between the third speed and the fourth speed, and a reverse gear not shown.

Further, as shown in FIG. 3, a drive gear 64 is provided in the drive portion of the output shaft 61, and this drive gear 64 meshes with the differential ring gear 72 in the differential gear 71 of the differential mechanism 7, whereby the power of the output shaft 61 is changed. It is transmitted from the gear 72 to the differential side gear 76 via the differential gear case 73, the differential spider 74, and the differential pinion 75, and further transmitted to the axle via the drive shaft 77.

This transmission operates as follows.

The servo mechanism 19 of the clutch 13 is a connecting rod that is manually or automatically operated.
When 191 is moved to the left in the figure, the pushing rod 192 is the fulcrum 193
Rotate counterclockwise to displace the sliding sleeve 196 through the bearing 195 toward the engine. As a result, the sliding sleeve 196 causes the center of the diaphragm spring 197 to bulge out of the engine, and the pressing ring 199 connected to the outer periphery of the diaphragm spring 197 is displaced leftward in the drawing. This action releases the clutch 13. In this state, the clutch 13 cuts off the power, so that the gear transmission 6 can perform a gear shift operation.

When the connecting rod 191 is actuated to the right in the figure manually or automatically, the sliding sleeve 196 is displaced to the left in the figure by the restoring force of the diaphragm spring 197, and the pressing ring 1
The engine 99 is pressed by the engine and the clutch 13 is engaged, and the input shaft 101 and the output shaft 103 of the transmission are connected via the coupling 11. The direct coupling clutch 15 is a centrifugal clutch and engages with the friction engagement surface 111A of the front cover 111 with a pressing force according to the rotation speed of the turbine blade 114.

When the clutch 13 is disengaged, the oil pump 17 is not rotationally driven because the turbine blade 114 is disconnected from the output shaft and is free to rotate and has the same rotational nonuniformity as the input shaft (or pump). Stop operation. At this time, the power transmission between the input shaft 101 and the output shaft 103 is surely cut off. Also, when the clutch 13 is engaged, the rotational speed difference (slip ratio) between the input shaft 101 (or pump) and the output shaft 103 (or disc plate 158).
According to the slip ratio, the oil sump 24
More hydraulic oil is pumped up and discharged into the fluid transmission 1. Then, it is discharged from the fluid transmission 1 through the hydraulic oil discharge passage 26 into the transmission case 10.

A transmission oil passage 24 is provided in the transmission case 10 when the vehicle is stopped.
An amount of hydraulic oil that can secure an oil level 245 that exceeds the oil port 242 of a is enclosed. However, when the vehicle is traveling forward at high speed, the oil level is lowered by the stirring of the differential ring gear 72, and is moved in the rotational direction of the differential ring gear 72 to reach the oil level 241b as shown in FIG. However, hydraulic oil discharge passage 2
The hydraulic oil discharged from the discharge oil port 265 of 6 to the front side in the rotation direction of the differential ring gear 72 with respect to the oil stop plate member R1 is prevented from moving in the rotation direction of the differential ring gear 72 by the oil stop member R1. The oil level 241a is secured by being stored in the hydraulic oil reservoir 266 on the front side in the rotational direction of the differential ring gear 72 with respect to the oil stop member R1 in a state where the differential ring gear 72 is less likely to mix and bubbles are less mixed. A communication oil passage 24a is provided on the front side of the oil stop member R1 in the rotational direction of the differential ring gear 72.
The oil port 242 of the above is opened, and the above-mentioned hydraulic oil reservoir 266.
The hydraulic oil with little air bubbles accumulated in the
It quickly flows into the oil sump 24 through 4a. Oil sump 2
4 is separated from the differential mechanism 7 by a partition wall 10c provided in the transmission case 10, and the oil sump 2
The hydraulic oil stored in No. 4 is not agitated by the rotation of the differential ring gear 72, the oil level is stable, the suction port 251 of the hydraulic oil supply oil passage 25 is opened to the atmosphere, and the oil pump 17 is air-cooled. Is prevented from being sucked in, and hydraulic fluid containing little air is supplied to the fluid transmission 1, so that stable performance of the fluid transmission 1 is ensured.

In the structure in which the oil pump 17 is driven by the relative rotation of the input shaft 101 and the output shaft 103 of the hydraulic transmission 1 as in the above-described embodiment, the suction / discharge direction of the oil pump is reversed during reverse driving such as engine braking of the vehicle. Therefore, in the present embodiment, the discharge oil port 26 of the hydraulic oil discharge oil passage 26 is reversed.
5 is set to be equal to or lower than the oil level 241a of the hydraulic oil sump 266 to prevent suction of air from the discharge oil port 265 during reverse driving.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a vehicle transmission according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line CC of FIG. 1, and FIG. 3 is a differential of FIG. A sectional view of the mechanism, FIG. 4 is A of FIG.
-A sectional view and FIG. 5 are BB sectional views of FIG. In the figure, 1 ... fluid transmission, 6 ... transmission, 7 ...
Differential mechanism, 72 ... Differential ring gear, 10 ... Transmission case, 10c ... Partition wall,
2 ... hydraulic oil supply / discharge device, 24 ... oil reservoir, 24a ... communication oil passage, 242 ... oil port, 25 ... hydraulic oil supply oil passage, 1
7 ... Oil pump, 26 ... Hydraulic oil discharge oil passage, 265
…… Drain oil port, R1 …… Oil stop member

Claims (1)

[Claims] 1. A fluid transmission that is coaxially connected to an output shaft of an engine, a transmission that is coaxially connected to the fluid transmission and is capable of at least forward / reverse switching, and a transmission of the transmission. A differential mechanism that has a differential ring gear that meshes with a drive gear that is provided on the output shaft and that drives a drive shaft that is arranged in parallel with the output shaft of the transmission, and the transmission and the differential mechanism are internal. In a vehicle transmission including a transmission case to be housed in a vehicle and a hydraulic oil supply / discharge device for supplying / discharging hydraulic oil to / from the fluid transmission, the hydraulic oil supply / discharge device is a lower portion of the transmission case. And an oil sump disposed at a position lateral to the differential mechanism, separated from the differential mechanism by a partition wall provided in the transmission case, and the partition wall. A pumping oil from the oil sump through a communication oil passage that connects the oil sump and the inside of the transmission case, a hydraulic oil supply oil passage that communicates with the oil sump, and the hydraulic oil supply oil passage. An oil pump for supplying the hydraulic transmission to the hydraulic transmission, a hydraulic oil discharge oil passage for discharging the hydraulic oil of the hydraulic transmission into the transmission case, and a lower portion of the transmission case adjacent to the differential ring gear. And an oil stop member that is disposed in the forward direction of the differential ring gear in the rotation direction of the transmission with respect to the oil stop member. An exhaust oil port that opens in the case and an oil port that opens in the transmission case of the communication oil passage are provided to prevent stirring of the hydraulic oil discharged and supplied into the transmission case. Transmission for vehicle.