JPH02171333A - Shift operation mechanism in automatic transmission - Google Patents

Abstract

PURPOSE:To simplify an interlock-transmission mechanism by operating a manual valve and a parking lock lever by the turning movement of a manual shaft in one direction in the other direction by operation of a shift lever. CONSTITUTION:When an outer lever 5 is put in a turning movement by operating a shift lever, a manual shaft 2 is turned in one direction or in the other direction below a transfer shaft case 13 in interlock with the outer lever to operate a manual valve 10 by means of a connecting arm 6 and conveniently operate a parking lock lever 15 to a locked condition or a released condition by means of a parking connecting arm 7. In this case, since the outer lever 5 and a neutral switch 3 are arranged below the case 13, they are not interfered with a starting motor 1, and since a valve body 9 is located on the side face, interference of the upper part of the case with a vehicle frame 23 is not caused. This constitution is thus simplified, and thereby generation of backlash can be extremely reduced.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a shift operation mechanism in an automatic transmission,
More specifically, the present invention relates to a shift operation mechanism in an automatic transmission in which a manual valve, an outer lever, and a parking lock arm are interlocked with each other via a manual shaft.

(b) Prior art-m, the shift operation mechanism includes a manual shaft connected to a spool of a manual valve, an outer lever interlocked with the manual shaft and disposed on the outside of the transaxle case, and the outer lever and a rod or pusher. It consists of a shift lever connected via a connecting means such as a pull cable, and the spool of the manual valve moves in conjunction with the movement of the shift lever.

Conventionally, in front-wheel drive vehicles, a valve body is housed in an oil pan provided on the underside of the transaxle case, and a starting motor is installed above the case. A manual shaft is disposed, and a parking connecting arm is installed inside the case on the shaft, and when the connecting arm rotates in conjunction with the shaft, a taper member interlocking with the connecting arm performs parking. The shift lever is rotated vertically and moved to a lock position or a release position, and the manual valve is operated in response to the movement of the shift lever. Furthermore, the shift operation mechanism is provided on the outside of the transaxle case.
A neutral switch is installed so that it is linked to the manual shaft, so when the outer lever attached to one end of the manual shaft that protrudes outside the case rotates in conjunction with the operation of the shift lever, the manual shaft rotates. The neutral switch, parking lock lever, and manual valve are each operated by the driver.

However, in the conventional shift operation mechanism described above, when the vehicle frame is laid out below the transaxle case, there is an inconvenience that the oil pan interferes with the vehicle frame. As shown in the figure, a valve body 9 is disposed along the vertical direction on the front side of the case, and a manual shaft 2 is rotatably disposed above the case, and the manual shaft 2 protrudes outward from the case. By rotating the outer lever provided at one end, the neutral switch 3 provided above the case is operated, the manual valve 10 is operated, and the parking connecting arm 16 provided at the other end of the shaft 2 is actuated, thereby operating the case. Parking lock lever 1 located above
A shift operation mechanism configured to rotate and operate 5 has been devised.

Further, as shown in FIGS. 6 and 7, a manual shaft 2 is installed so as to extend in the vertical direction of the case 13, with one end thereof protruding upward, and is located at a lower part inside the case 13. A connecting arm 19 is fixed to the other end of the connecting arm 19, one end of the connecting arm 19 is connected to the manual valve 10, the other end is connected to the link 16, and a second parking connecting arm is fixed to the other end of the interlocking link 16. A shift operation mechanism has been devised in which the parking lock lever 15 is interlocked with the parking lock lever 15 by the arm 17.

(C) Problems to be Solved by the Invention By the way, although the shift operation mechanism shown in FIG. Since the neutral switch 36 is arranged above the case, the outer lever, the neutral switch 3, etc. may interfere with the starting motor 1, which is located above the case.

Although the configuration shown in FIGS. 6 and 7 can prevent interference between the starting motor 1 and the outer lever, etc., the configuration requires a large number of sinks and the interlocking/transmission mechanism becomes complicated. As a result, there is a risk that the reliability of the device may be affected, such as the possibility of rattling.

Therefore, the present invention has been devised so that the manual valve and the parking lock lever can be operated by a single manual shaft, in which the valve body is arranged along the vertical direction of the case, and is installed approximately horizontally below the transaxle case. It is an object of the present invention to provide a shift operation mechanism configured to solve the above-mentioned problems.

(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, referring to FIG. 1, the manual valve (10) disposed on the valve body (9) ), an outer lever (5) connected to the shift lever, and a parking lock arm (14) that locks the parking lock gear (14).
15), and these manual valves (10), outer levers (5) and parking lock arms (15).
are interlocked with each other via the manual shaft (2) and become self! Shift operation in plJ transmission (A)'! II
j14, the part body (9) is arranged on the side surface of the transaxle case (13) so as to be substantially parallel to the vertical direction of the case, and the manual shaft (2) is arranged so that at least one end thereof is in the lower part of the case. The outer lever (5) is arranged substantially horizontally so as to protrude outward, and the outer lever (5) is fixed to the protrusion, and furthermore, a manual valve connection τ- is attached to the manual shaft (2) inside the case. arm (6) and parking connecting arm (7)
and connect these connecting arms (6) and (7) to the manual shaft (10) and parking lock lever (15), respectively, so that the manual shaft (2) can be moved in one direction or the other based on the operation of the shift lever. The present invention is characterized in that the manual valve (1o) and the parking lock lever (15) are operated by rotation in the other direction.

Further, one end of the manual shaft (2) protrudes to the - side of the transaxle case (13), and an outer lever (5) and a neutral switch (3) are installed in the protrusion.

Furthermore, as shown in FIG. 4, for example, the manual shaft (2) is protruded from both left and right sides of the transaxle case (13), and the neutral switch (3) is provided on one of the protrusions, and the outer lever is provided on the other. (
5).

(E) Effect Based on the above configuration, when the outer lever (5) is rotated by operating the shift lever, the manual shaft (2) is rotated in conjunction with the rotation of the outer lever (5) by operating the shift lever.
) is rotated downward in one direction or the other, thereby causing the connecting arm (6) to operate the manual valve (10), and the parking connecting arm (7) to rotate the parking lock lever (15), thus Manual valve (
10) is operated appropriately, and the parking lock lever (
15) is also operated to a locked state or a released state at an appropriate time.

Since the outer lever (5) and the neutral switch (3) are arranged at the lower part of the case, for example, if the starting motor (1) is arranged above, there is a gap between the outer lever (5) and the neutral switch (3). There is no interference, and since the valve body (9) is located on the side of the case (13), the lower part of the transaxle case is attached to the vehicle frame (
23), thus eliminating interference between the lower part of the case and the frame (23).

Note that the symbols in parentheses are used to refer to the drawings, but do not limit the structure in any way.

(F) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the automatic transmission A has a transaxle housing 8, a transaxle case 13, and a transaxle cover 17, and the housing 10 and cover 17 are fixed to both sides of the case 13, respectively. It constitutes an integrated case. Further, within the integrated case, a first shaft 29 is supported concentrically with the engine crankshaft, and a third shaft 31 serving as a front axle shaft is also supported, and together with the first and third shafts, the first shaft 29 has a triangular shape. The second shaft 30 is supported so as to be at the apex of. And the first
On the shaft 29, the torque converter 3 is installed sequentially from the engine side.
2, an oil pump 21, a brake section 35, a counter drive gear 36, a four-speed forward transmission mechanism 37 consisting of a combination of single and dual planetary gears, and a clutch section 39 are provided. Further, on the second shaft 30, an output gear 40, a parking lock gear 14 provided integrally with the gear 40, a counter driven gear 41, and an underdrive mechanism 42 for switching between direct connection and deceleration rotation are arranged. Further, a front differential device 43 is arranged on the third shaft 31, and the left and right front axle shafts 31a, 31 are connected from the differential device to the third shaft 31.
b is growing.

As shown in FIG. 1, the transaxle case 13 has a side surface B, and the part body 9 is fixed to the side surface B with bolts. In addition, the front surface C of the transaxle case 13 becomes a joint surface that connects with the rear surface of the transaxle housing 10 (see Fig. 3).
The cases 10 and 13 are coupled in an oil-tight manner, and the bottom of the case serves as an oil reservoir space 22 in which a predetermined amount of oil is stored. Note that 1 in the figure is a starting motor.

Further, a manual shaft 2 or one end thereof is installed in the transaxle case 13 so as to protrude in the longitudinal direction of the vehicle, and a neutral switch 3 having one end fixed to the case 13 is installed at one end of the shaft 2. are interlocked and connected, and the outer lever 5 is fixed. Inside the case 13, a manual valve connecting arm 6 is attached to one end of the manual shaft 2, and a parking connecting arm 7 is attached to the other end. Further, the valve body 9
A manual valve 10 is installed substantially horizontally in the manual valve 10, and the connecting arm 6 is interlocked and connected to the valve 10. A rod 12 having a tapered member 11 attached to its tip is connected to the connecting arm 7,
Therefore, when the outer lever 5 is operated and the manual shaft 2 is rotated in a direction perpendicular to the axis, the connecting arm 6 operates the manual valve 10, and the parking connecting arm 7 is connected to the taper member 1 via the rod 12.
The parking lock lever 15, which is rotatably installed below the parking lock gear 13, is rotated in the vertical direction by moving the parking lock lever 15 as appropriate.
is configured to be engaged with the teeth of the gear 14 and mechanically locked.

Since this embodiment has the above configuration, the rotation of the engine crankshaft is controlled by the torque converter 3 of the automatic transmission A.
2, and further from the first shaft 29 to the forward four-speed transmission mechanism 3.
7, and is transmitted to the clutch section 39 and the brake section 3.
5 is operated appropriately based on the oil pressure from the valve body 26, the transmission gear portion 37 is appropriately switched, and a predetermined rotation is transmitted to the underdrive mechanism 42 on the second shaft 30 via the counter drive gear 36 and the driven gear 41. be done. Similarly to the gear section 37, the gear section 42 is also shifted as appropriate based on the oil pressure from the valve body 9.
The rotation is transmitted to the second shaft 30 and the output gear 40. Furthermore, the rotation of the output gear 40 is transmitted to the front differential device 43 via the ring gear 43a, and the third
Left and right front axle shafts 31a, 31 forming the shaft 31
b is transmitted to the left and right front wheels. On the other hand, in addition to the hydraulic oil flowing from the valve body 9 to the clutch section and the brake section,
Oil holes 29a of the first shaft 29 and second shaft 30 as lubricating oil,
It is supplied to each lubricating point via 30a and the like.

Drain oil from each hydraulic servo of the clutch section 39 and brake section 35 is discharged from the valve body 9 into the oil passage of the transaxle case 13, and further sucked into the suction port of the oil pump 21. Further, the oil used as lubricating oil is stored in the oil reservoir space 22.

On the other hand, when the outer lever 5 is rotated using a connecting means such as a rod or wire based on the shift lever operation, the neutral switch 3 is actuated in a timely manner by the rotation, and the manual valve 10 is activated via the connecting arm 6. Be manipulated. Further, as the manual shaft 2 rotates, the link member 12 slides on the taber member 11 via the connecting arm 7, and this causes the parking lock lever 15 to rotate in the vertical direction and lock the pawl 15a into the parking position. It engages with the locking gear 15 and performs locking and unlocking operations as appropriate. On this occasion,
The neutral switch 3 and the outer lever 5 are arranged in the lower part of the transaxle case 13 and are located apart from the starting motor 1, so that they can be smoothly operated without being interfered with. Also, case 1
3, the manual valve 10 and the parking lock lever 15 are simultaneously operated by the rotating movement of the single manual shaft 2. Because of the simple operation, there is no play or the like, and the operation is easy. The mechanism operates smoothly. Furthermore, since the valve body 9 is not located below the case, there is no risk of interference with the road surface, and the valve body 9 can also be installed in a four-wheel drive vehicle.

In this embodiment, the outer lever 5 and the neutral switch 3 are arranged together on one side of the case 13, but as shown in FIG. In addition, the neutral switch 3 may be attached to one end of the shaft 2, and the outer lever 5 may be attached to the other end.

(G) As described in detail, according to the present invention, the valve body (9
) on the side of the transaxle case (13),
A manual shaft (2) is disposed substantially horizontally so that at least one end of the manual shaft (2) projects outward from the bottom of the case, and an outer lever (5) is fixed to the protrusion, so that the shaft (2) can be operated by operating the shift lever. Since the valve (9) and lock lever (15) are operated by the rotation of the outer lever (5), etc., the starting motor (1)
It is possible to eliminate mutual interference by separating the engine and the transaxle case (13), and sometimes it is possible to use an impact wrench when assembling the engine and the transaxle case (13).
Vehicle mountability can be improved. Furthermore, since the valve body (9) is not located below the transaxle case (13), even if the vehicle frame (23) is laid out below the case (13), it will interfere with the frame (23). There is no problem, and even more part body (
9) Since there is no risk of interference with the road surface, it can be installed in 4-wheel drive vehicles and can be applied to a wide variety of vehicle types. In addition, since it has a simple configuration in which the manual valve (10) and parking lock arm (15) are operated by rotating the manual shaft, it is possible to prevent play from occurring as much as possible, increasing the reliability of the device. can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a side view of a transaxle case showing essential parts of a shift operation mechanism according to the present invention, FIG. 2 is a perspective view of the entire transaxle case, and FIG. 3 is a sectional view showing an automatic transmission to which the present invention is applied.
FIG. 4 is a side view of a transaxle case showing essential parts of a shift operation mechanism showing another embodiment. Furthermore, FIGS. 5 and 6 are side views of the transaxle case showing the shift operation mechanism that is the basis of the present invention. And the seventh
The figure is a view of the shift operation mechanism of FIG. 6 viewed from below. 2... Manual shaft 3... Neutral switch, 5... Outer lever 6... Connection arm for manual shaft 7... Connection arm for parking 9... Part body 10... Manual valve 13... transaxle case
14... Parking lock gear, 15...
・Parking lock arm A... Automatic transmission Fig. 1 Fig. 4 Fig. 5

Claims (1)

[Claims] 1. A manual valve disposed on a valve body, an outer lever connected to a shift lever, and a parking lock arm for locking a parking lock gear. In a shift operation mechanism for an automatic transmission in which parking lock arms are interlocked with each other via a manual shaft, the valve body is disposed on a side surface of a transaxle case so as to be substantially parallel to the vertical direction of the case, Further, the manual shaft is disposed substantially horizontally so that at least one end thereof projects outward from the bottom of the case, and the outer lever is fixed to the projecting portion,
Furthermore, a manual valve connecting arm and a parking connecting arm are attached to the manual shaft inside the case, and these connecting arms are connected to the manual shaft and the parking lock lever, respectively, so that the above-mentioned movement based on the operation of the shift lever is performed. A shift operation mechanism for an automatic transmission, characterized in that the manual valve and the parking lock lever are operated by rotation of a manual shaft in one direction or the other direction. 2. The shift operation mechanism for an automatic transmission according to claim 1, wherein one end of the manual shaft protrudes to one side of the transaxle case, and an outer lever and a neutral switch are installed in the protrusion. 3. The shift operation mechanism for an automatic transmission according to claim 1, wherein the manual shaft protrudes from both left and right sides of the transaxle case, the neutral switch is provided on one of the protrusions, and an outer lever is provided on the other.