JPS6121851A - 4-wheel drive transfer - Google Patents

Abstract

PURPOSE:To achieve reliable parking by providing a parking gear coupled to the output shaft and a parking pole displacable in the rotary direction through an axially displacable rod. CONSTITUTION:The rod 41 of parking mechanism has one end coupled to a detent lever 31 and advances/retracts in axial direction through the shaft of detent lever 31 or the shift lever shaft 21. The hab 43 associated with bracket is provided while extending the tubular section for supporting the tip of rod 41 couplably from the cam face 42 when separating the tip of the rod 41 from between the cam 42 and the parking pole 45. The parking pole 45 is provided with a click 44 for stopping the parking gear 1A secured to the output shaft of automatic speed changer through a parking window 4A made through the transfer case 148.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a four-wheel drive transfer for a vehicle.

[Prior Art] Conventionally, a four-wheel drive transfer including an input shaft driven by an output shaft of a main transmission, and a first output shaft and a second output shaft connected to the input shaft is a manual transmission. Therefore, a four-wheel drive transfer that has a two-wheel drive state and a four-wheel drive state with a number of gear ratios or a plurality of gear ratios uses a parking brake device to obtain a parking brake force when parking.

[Problem to be solved by the invention 1] However, since the parking brake is usually used when the engine is stopped or the vehicle is stopped, the JM position cannot be used and requires human hands. Alternatively, the braking force is generated only by the force of the foot, and the braking force is relatively weak. Further, this braking force is left to the sensation of the human hand or foot when pulling the brake lever (or depressing the pedal), and it is not always possible to obtain a reliable braking force. Therefore, when parking with the engine stopped, the parking brake is used as an auxiliary means to engage the transmission in a certain gear, engage the clutch, and create a direct connection between the engine and transmission, allowing the engine crankshaft to rotate. The friction restraining force against the parking brake is used for the parking brake. However, this frictional restraining force is not very strong,
It is not possible to reliably park a vehicle on a slope that is steeper than a certain level.

In addition, a strong parking brake is required to securely park the vehicle, and one way to obtain this is to set a dedicated parking gear in the transmission (parking gear) and attach it to the transmission case. A parking mechanism is known in which the output shaft is reliably locked by meshing with a lock pole provided in the parking lot. In a vehicle that combines one of these with a four-wheel drive transfer automatic transmission, for example, even if the automatic transmission's shift position is the parking position, if the transfer's shift position is neutral, the parking function will not be performed. Therefore, it is not possible to park the vehicle reliably.IC6The present invention provides that when the manual shift lever of the main transmission is set to the parking position regardless of the shift 1 position of the 4-wheel drive transfer, the 4-wheel drive 1-transfer An object of the present invention is to provide a heavy-duty four-wheel drive vehicle that can be reliably parked because the first output shaft and/or second output shaft of the vehicle can be locked.

[Means for solving the problem] The four-wheel drive transformer of the present invention has an input shaft driven by the output shaft of the main transmission, and a first shaft connected to the input shaft.
In a four-wheel drive one-lance foot comprising an output shaft and a second output shaft, a parking gear provided on the first or second output shaft or a member integrally connected thereto is connected to an input means. A parking mechanism is provided which includes a rod that is displaced in the axial direction and a parking pole that is displaced in the rotational direction about a fulcrum by the L'' rad.

[Operation] The operation of the present invention is to set the manual shift lever, which is the input means, to the (P) range, and rotate the lever provided inside the machine in conjunction with the manual shift 1 lever.
The rod interlocked with the lever extends from the main transmission 1 to the 7 cases and moves forward or backward in the axial direction, thereby pressing the parking pole provided in the l-lance case. , the parking pole is the first
A parking gear connected to the output shaft or the second output shaft is stopped through a parking window formed in the transfer case to lock the first output shaft. Due to this, 4
In the case of a wheel drive transfer, parking is also achieved reliably.

Effects of the Invention] Through the above-mentioned development, the four-wheel drive transfer of the present invention has the following effects.

b) 4-wheel drive 1~Lance front shift 1~Position When the shift lever of the main transmission is set to the parking position, it is possible to park the vehicle reliably, regardless of the shift position.

口) You can reliably park even on steep slopes.

[Embodiment] A four-wheel drive transfer according to the present invention will be explained based on an embodiment not shown in the drawings.

FIG. 1 shows the configuration of a floor shift two-speed selection device incorporated in a four-wheel drive l~transfer of the present invention;
Lever mechanism, 2 is a shift lever shaft mechanism, 3 is a detent mechanism, 4 is a parking mechanism (shown in Figure 2), 5
1 is a hydraulic control device for an automatic transmission, and 6 is a push-pull cable that is a control wire for linking the shift lever mechanism 1 and the shift lever shirt l-IHM2.

The shift lever mechanism 1 is pivotally connected to the vehicle body at an intermediate portion 110, has a T-shaped grip 111 at its head, and has a lower end 110.
12 includes a shift lever 11 connected to one end 61 of the push-pull cable 6, a display plate 12 for clearly indicating the set position of the shift lever 11, and a stopper WJ13 for stopping the shift lever 11 at a predetermined position. Consisting of

The stopper mechanism 13 is disposed parallel to the working surface of the shift lever 11, and is located at N and D of the shift lever 11.

Smooth arc-shaped intermediate continuous portion 1 corresponding to each position of S
31A, an R section 131B that is connected to the front glass (on the right side in the figure) of the intermediate continuous section 131A via a step 131a and corresponds to the R position of the shift 1 to lever 11;
A second portion 131C1 is connected via a second portion 131C1 corresponding to the position P of the shift lever 11, and a second portion 131C1 is connected via a step 131d downstream of the intermediate connecting portion 131A, and is connected to the second portion 131C1 corresponding to the position P of the shift lever 11.
Working edge 13 consisting of 1 part 131D corresponding to the L position of 1
1, and a kite plate 132 provided on the shift lever 11 so as to be in sliding contact with the working edge 131.
and a locking pawl 135 that is disposed above the middle 110 of the shifter 1 to move upward when the button 115 provided on the handshake 111 of the shifter 1 to the lever 11 is pressed.

Shift lever shaft machine 4fIi24, shift lever jab 1 rotatably supported by automatic transmission case 10
~21, the tip is the other end 62 of the push-pull cable 6
The rear end has an outer lever 22 which is connected to one end of a shift lever shaft 21.

The timer mechanism 3 moves the shift lever lever 17 to the lever 1 21
It has a plate shape that is fixed to the other end and rotates integrally around the shift levers 1771 to 21, and has setting positions P, R, and D for the shift levers 1771 to 11 on the outer periphery that becomes the working edge.

Notches p, r, n, corresponding to each of 511-
d, s.

a detent spring having one end 32 fixed to the automatic transmission case 10 and a roller 33 attached to the other end, the roller 33 being pressed against the working edge of the detent lever 31; It consists of 35.

As shown in FIG. 2.3.4, the parking mechanism 4 is connected at one end to a lever 31 connected to the detent 1 as shown in FIG. Without moving forward or backward in the axial direction, the rod 41, the cam 42 provided at the other end (tip) of the rod 41, and the tip of the rod 41 are separated from between the cam 42 and a parking pole 45 to be described later. At this time, a bracket 1 is provided by extending a cylindrical portion supporting the tip of the rod 41 from the surface of the cam 42 in a connected manner.
A hub 43 with a hem, a parking pole 45 equipped with a pawl 44 that is pressed by the rod 41 and locks the parking gear 1A through a parking window 4Δ formed in the case 148 of the 1 to 7 lances, and an output shaft of the automatic transmission. It consists of a fixed parking gear 1A.

The hydraulic control device 5 includes a valve body 50 provided with a hydraulic control circuit including a manual valve 51 connected to the Deten 1 to the lever 31 and the rod 36, and other valves.
Equipped with

Fig. 6.7 shows a vehicular four-wheel drive transformer 77 automatic transmission incorporating the four-wheel drive transfer of the present invention.

The transfer 200 is provided within a torque converter housing 11 housing a torque converter, an automatic transmission case 10 fastened to the torque converter housing 11 with bolts, a transfer case 148 fastened to the automatic transmission case 10, 4 which is a frictional engagement element
Wheel drive reduction clutch (hereinafter abbreviated as reduction clutch) C3
, the brake B4J, i, the two-wheel/four-wheel switching clutch C4, the parking mM44, and the output shaft 232 of the planetary gear set (not shown) of the automatic transmission in the transmission case (not shown) are connected to the input shaft. Axis (232)
The first output shaft 2 of the transfer 200 arranged in series with
42, a planetary gear set Pf arranged between the input @ (232) and the first output shaft 242, a four-wheel drive sleeve 25 rotatably fitted on the first output shaft 242;
1. The first
A second output shaft 2 taken in the opposite direction to the output shaft 242
52, a transmission mechanism 253 between the sleeve 251 and the second output shaft 252; Furthermore, transfer case 1
48 is an input booth extension booth 148a
, front sleeve [1 butt case ~ 1481), rear sleeve [1
Butt case 148C, Ex-Ancillary housing 148d or 1.

The planetary gear set Pf includes a linkage 244 spline-fitted to the end of the input shaft (232),
44, a ring gear 246 that meshes with the planetary pinion 245, and a ring gear 246 that rotatably holds the planetary pinion 245 and is connected to the tip of the first output shaft 242 of the transfer 200. The carrier consists of 247 carriers.

The reduction clutch 03 is disposed on the left side of the planetary gear set Pf (hereinafter referred to as the transmission case side), and connects and disconnects the sun gear 244 and the carrier 247, and the hydraulic cylinder 2 connected to the carrier 247.
30 and the piston 2 installed in the hydraulic cylinder 230
The hydraulic cylinder 230 is operated by a hydraulic 4-novo C-3 formed by P and "c-MII".
When the parking gear 1A is installed and the shift lever 11 of the automatic transmission is selected as the parking pole, the pawl 4
4 engages with the parking pole 45 and the first output shaft 242
an outer cylinder 233 which fixes the deceleration clutch C3 and supports the deceleration clutch C3 by an inner spline 231a, a snap ring 236 disposed coaxially with the outer cylinder 233 and fixed to a recess 235 in the outer periphery 234, and screws 1 to 1.
Inner cylinder 2 with spring 237 arranged between springs 230P
38, the outer cylinder 233 and the inner cylinder 23
8 and 3! l! It consists of a long annular portion 239.

The brake B4 is a multi-plate friction brake for engaging the ring gear 246 with the transfer case 148, and is a hydraulic cylinder 2 formed inside the transfer case 148.
49 and the piston 2 installed in the hydraulic cylinder 249
It is operated by hydraulic servo B-4 consisting of 49P.

The two-wheel/four-wheel switching clutch C4 includes a first output shaft 242 connected to the rear kit 247 and a sleeve 251 connected to one sprocket 256 of a transmission mechanism 253 for driving a second output shaft 252 of the transfer 200. It is a multi-disc friction clutch for connecting and disconnecting, and transfer case 1
48 and a piston 258P mounted inside the hydraulic cylinder 258. The transmission mechanism 253 includes a sprocket 256 spline-fitted to the sleeve 251, a sprocket 255 formed at the second output @252, and a chain 257 stretched between these sprockets.

260 is 1-transfer 200 deceleration clutch C3,2
1 to 1 to supply and discharge hydraulic pressure to hydraulic levers C-, 3, C-4, and B-4 of four-wheel switching clutch C4 and brake B4;
The transfer valve body 261 is provided with a transfer hydraulic control device 263, and its oil pan is 261.

Hydraulic servos C-3, C-4 and [3-4
Line pressure oil is supplied to the automatic transmission case 10 and the transfer case from an automatic transmission housing in which an automatic transmission hydraulic control device is installed in an oil pan 10a fastened to the lower surface of the automatic transmission case 10. Transfer hydraulic control device 26 via oil passage 264 provided in 148
3 is introduced into the transfer pulp body 260 in which the pulp body 260 is provided.

During normal driving, the line pressure supplied to the hydraulic control 311 device 5 of the automatic transmission is supplied to the hydraulic servo C-3 via the oil passage 265 to engage the deceleration clutch C3, and the hydraulic servos B-4 and C1 are activated. The pressure is discharged to release brake B4 and clutch C4.

As a result, the sun gear 244 of the planetary gear set Pf
and the carrier 247 are connected, and the power is input from the input shaft < 23
2) is transmitted to the first output shaft 242 at a reduction ratio of 1, thereby obtaining two-wheel drive mode with only the rear wheels. At this time, the input shaft (232
) is transmitted to the reduction clutch C3 without passing through the sun gear 244, planetary pinion 245, or ring gear 246.
Since the signal is transmitted to the first output shaft 242 via the Kirelia 247, no load is applied to the tooth surfaces of each gear, increasing the life of the gears. During this 2-wheel drive operation, when 4-wheel drive operation is required, the shift lever 11 installed on the driver's seat etc. can be manually shifted to 1-shift, and the transfer hydraulic system 263
When line pressure is gradually supplied to the hydraulic servo C-4 to smoothly engage the two-wheel/four-wheel switching clutch C4, the first output shaft 242 and the sleeve 251 are connected, and the first output shaft 242 and the sleeve 251 are connected.
, the power is also transmitted to the front wheels via the second output shaft 252 and the propeller shaft (not shown), and the power is transmitted to the input shaft < 232).
Power is transmitted from
wheel drive condition). During this 4-wheel drive operation, when the shift lever is manually shifted when an increase in output torque is required, such as on a steep slope, the hydraulic pressure to the hydraulic servo activates the switching valve between high-speed 4-wheel drive mode and low-speed 4-wheel drive mode. , the line pressure is gradually supplied to the hydraulic servo B-4, and at an appropriate timing, the hydraulic pressure of the hydraulic servo C-3 is increased by 1 no., the brake B4 is gradually engaged, and the deceleration clutch C3 is smoothly released. As a result, sun gear 244 and carrier 247 are released, and ring gear 246 is fixed, and the power is decelerated from the input shaft (232) via sun gear 244, planetary binion 245, and carrier 247, and the first output shaft 242 and J : and is transmitted to the second output shaft 252, making it impossible to obtain a four-wheel drive normal state (low-speed four-wheel drive state) with a large torque.

Table 1 shows the setting range of the manual shift of 1 to 200 and the running states of the brake 84, deceleration clutch C3, and two-wheel/four-wheel switching clutch C4, including engagement, disengagement, and disengagement.

Table 1 In Table 1, ◯ indicates the engaged state of the friction engagement element, and × indicates the released state. The reduction ratio (3.0 in the example) is the reduction ratio −(
1+λ)/λ-3,0.

[Brief Description of the Drawings] Fig. 1 is a perspective view of the 70-shift 1 speed selection mechanism incorporated in the four-wheel drive transfer of the present invention, Fig. 2 is a configuration diagram of the parking mechanism, Fig. 3 4 is a front view of the parking mechanism, FIG. 4 is a side view of the parking mechanism, FIG. 5 is another side view of the parking mechanism, and FIG. 6 is a fourth embodiment of the present invention.
Wheel drive transfer for vehicle 4 wheel drive transfer 1
FIG. 7 is a cross-sectional view of the device incorporated into an automatic transmission, and FIG. 7 is a side view of FIG. 6. In the diagram 1A...Parking gear 4...Parking gear 44...Claw 45...Parking pole 2
00...4 wheel drive transfer

Claims (1)

[Scope of Claims] 1) A four-wheel drive transfer comprising an input shaft driven by an output shaft of a main transmission, and a first output shaft and a second output shaft connected to the input shaft, a parking gear provided on the first or second output shaft or a member integrally connected thereto; a rod connected to the input means and displaced in the axial direction; and a parking gear disposed in the rotational direction around a fulcrum by the rod. A four-wheel drive transfer characterized by having a parking mechanism consisting of a pole. 2) The first output shaft is always connected in series to the input shaft, and the second output shaft is arranged parallel to the input shaft and installed in the opposite direction to the first output shaft. , in the case of a four-wheel drive state, the second output shaft is connected to the first output shaft by a transmission mechanism between the four-wheel drive sleeve rotatably fitted on the first output shaft and the second output shaft. A four-wheel drive transfer according to claim 1. 3) The parking gear is provided on the outer periphery of a hydraulic cylinder of a hydraulic multi-plate clutch, the input means is a manual shift lever provided at the driver's seat, and the rod rotates in conjunction with the manual shift lever. A lever is provided inside the main transmission case so that the lever extends from the main transmission case to the transfer case, and moves forward and backward in the axial direction to move the parking pole provided inside the transfer case. It is something that presses
The four-wheel drive transfer according to claim 1, wherein the parking pole locks the parking gear through a parking window formed in the transfer case.