JP7394636B2 - transmission parking mechanism - Google Patents

Description

The present invention relates to a transmission parking mechanism, and particularly to a transmission parking mechanism that prevents transmission of driving force from a transmission.

In the parking mechanism, a parking gear that rotates as the driving force is transmitted within the transmission is provided in the driving force transmission path within the transmission, and a parking pole that meshes with the parking gear is also provided within the transmission. Sometimes, the parking pole is meshed with the parking gear to prevent the transmission of driving force. Generally, a parking mechanism is often not provided in a manual transmission.

However, with a manual transmission, the transmission gears can be engaged (actually, the gears and shafts are connected) when the engine is stopped, so if you start the engine in that state, there is a risk that the vehicle will move unnecessarily. . Therefore, a manual transmission equipped with a parking mechanism has been proposed as described in Patent Document 1 below. This manual transmission parking mechanism includes a parking gear in the driving force transmission path of the manual transmission, and a parking pole that meshes with the parking gear is also provided inside the manual transmission, and the parking mechanism is locked by driving the parking pole with an actuator. state.

Japanese Patent Application Publication No. 2001-280495

A typical parking mechanism requires an actuator to engage the parking pole with the parking gear, and the driver must drive this actuator to engage the parking pole with the parking gear, that is, to lock the parking mechanism. needs to perform some operation. In the case of a vehicle equipped with an automatic transmission, the above-mentioned P range is selected, but even in a manual transmission equipped with a parking mechanism described in Patent Document 1, for example, operation of a parking switch is required.

On the other hand, if you start the engine with the gear in neutral, it will naturally start with the brake depressed. At this time, since boost pressure is applied when starting a supercharged engine, the negative pressure in the brake booster may drop, and if the negative pressure in the brake booster drops and sufficient braking force cannot be obtained, the A decrease in braking force when the vehicle is stopped on a slope causes the vehicle to start moving unexpectedly, which is undesirable. In this case, the only unnecessary movement of the vehicle that should be avoided is when starting the engine.

The present invention has been made in view of the above problems, and its purpose is to prevent unnecessary movement of the vehicle when starting the engine without requiring an operation to lock the parking mechanism. The object of the present invention is to provide a possible transmission parking mechanism.

In order to achieve the above object, the transmission parking mechanism of the present invention includes:
In the transmission parking mechanism that prevents transmission of driving force from the transmission,
a parking gear that is provided in a driving force transmission path of the transmission and rotates as the driving force is transmitted; and a parking gear that is capable of meshing with the parking gear, and that meshing and disengaging with the parking gear are performed externally of the transmission. a parking pawl that can be operated from the engine; and a parking pawl operating mechanism that is interlocked with the operation of a pinion of a starter motor for starting the engine, and that engages the parking pawl with the parking gear while the pinion is in mesh with the ring gear of the engine. It is characterized by having the following.

According to this configuration, the parking pole is engaged with the parking gear and the rotation of the drive shaft is prevented only when the pinion is engaged with the ring gear of the engine by the starter motor, that is, when the engine is started. unnecessary movement of the vehicle is avoided. At this time, the driver only performs the operations necessary to start the engine, such as turning on the ignition switch or turning on the start switch, and does not perform individual operations to lock the parking mechanism. do not need.

Further, in another configuration of the present invention, the parking pole operating mechanism includes an input side reciprocating mechanism that reciprocates in conjunction with the forward and backward movement of the pinion toward the ring gear, and an input side reciprocating mechanism that engages the parking pole with the parking gear. an output-side reciprocating mechanism that reciprocates in conjunction with the release operation; and an output-side reciprocating mechanism that engages the input-side reciprocating mechanism so that the parking pole meshes with the parking gear while the pinion is advancing toward the ring gear. An interlocking mechanism that connects and interlocks the moving mechanism.

According to this configuration, the input side reciprocating mechanism and the output side reciprocating mechanism are simply connected and interlocked by the interlocking mechanism, and there is no need to operate the parking mechanism to lock the engine. It is possible to prevent unnecessary movement of the vehicle at the time of starting.

A further configuration of the invention is characterized in that the interlocking mechanism is constituted by a push-pull cable.

According to this configuration, by connecting the input-side reciprocating mechanism and the output-side reciprocating mechanism with a push-pull cable that can transmit operating force to both the push side and the pull side, and interlocking the two, it is possible to create a complicated link mechanism. It is possible to prevent unnecessary movement of the vehicle when starting the engine without requiring an interlocking mechanism.

As explained above, according to the present invention, in a vehicle equipped with a transmission, unnecessary movement of the vehicle when starting the engine can be prevented without requiring an operation to lock the parking mechanism. This makes it possible to improve the performance of vehicles equipped with a transmission.

1 is an overall schematic configuration diagram showing an embodiment of a vehicle to which a transmission parking mechanism of the present invention is applied. 2 is a configuration diagram of an output side reciprocating mechanism of the transmission parking mechanism of FIG. 1. FIG. FIG. 2 is a configuration diagram of an input side reciprocating mechanism of the transmission parking mechanism of FIG. 1;

EMBODIMENT OF THE INVENTION Below, one embodiment of the transmission parking mechanism of this invention will be described in detail with reference to drawings. FIG. 1 is a schematic diagram of a vehicle to which the transmission parking mechanism of this embodiment is applied. This vehicle is equipped with, for example, only an engine 1 as a vehicle drive source, and a transmission 2 as a transmission that decelerates and transmits the driving force of the engine 1. Further, in this vehicle, a start (stop) switch 3 for starting and stopping the engine 1 is provided near the driver's seat, and an engine control unit 4 disposed inside the vehicle controls the start switch 3 to turn on and off. It is configured to drive the starter motor 5 and start the engine 1 with an operation, and stop the engine 1 with an OFF operation. Note that the starter motor 5 for starting the engine 1 in this embodiment is a general starter motor slightly modified, as will be described later.

The configuration of the transmission 2 itself is the same or almost the same as an existing one, and in this embodiment, for example, the parking gear 6 shown in FIG. It is fixedly installed. Therefore, the parking gear 6 is rotated as the driving force within the transmission 2 is transmitted. The parking gear 6 of this embodiment is similar to the existing parking gear, and has rectangular teeth 6a formed at equal intervals on the outer periphery of a disc-shaped gear body. A parking pawl 8 that meshes with the teeth 6a of the parking gear 6 is also provided within the transmission 2. This parking pole 8 is also similar to the existing parking pole, and has teeth 8a that mesh with (between) the teeth 6a of the parking gear 6 at the tip of a hook-shaped arm portion 81. A base end portion of the portion 81 is rotatably supported by, for example, a rotating shaft 91 protruding from a transmission case. Therefore, as the arm portion 81 of the parking pole 8 reciprocates around the rotating shaft 91, the teeth 8a of the parking pole 8 are brought into and out of contact with (between) the teeth 6a of the parking gear 6, and the parking pole 8 When approached by the parking gear 6, the two engage, and when the parking pole 8 is separated from the parking gear 6, the engagement between the two is released. A return spring 92 is provided near the rotating shaft 91 to bias the arm portion 81 of the parking pawl 8 in a direction in which the parking pawl 8 moves away from the parking gear 6.

A lever portion 82 is provided on the arm portion 81 of the parking pole 8 in a direction opposite to the direction in which the teeth 8a are provided, and a cam surface 83 is formed at the tip of the lever portion 82 . This cam surface 83 is provided so as to face in the direction in which the parking pawl 8 moves toward and away from the parking gear 6, and a camshaft 93 is disposed at the front of this cam surface 83. A cam receiving member 95 is disposed at. The camshaft 93 extends parallel to the cam surface 83, and has a substantially cylindrical cam body 94 attached to the right end in the figure. The camshaft 93 is disposed so as to be movable in its axial direction, and a truncated conical cam 94a is formed at the left end of the cam body 94 in the drawing. The cam receiving member 95 is provided with a cam storage portion 95a that is recessed to cover the camshaft 93. When the camshaft 93 is moved to the left in FIG. It fits into the cam storage portion 95a. At this time, the cam 94a of the cam body 94 presses the cam surface 83 of the lever part 82 of the parking pawl 8 to the left in the figure, the arm part 81 rotates counterclockwise, and the teeth 8a of the parking pawl 8 move into the parking position. It meshes with (between) the teeth 6a of the gear 6.

A swing shaft 96 extending perpendicular to the axis of the camshaft 93 is integrally provided at the left end of the camshaft 93 in the figure, and one end of a swing arm 97 is attached to the swing shaft 96. The part is rotatably attached. The right end of an individual rotation shaft 98 is inserted through and fixed to the other end of the rotation arm 97, and the rotation shaft 98 is supported rotatably around its own axis. . The rotation shaft 98 up to the attachment portion of the rotation arm 97 is disposed inside the transmission 2, and the left side portion of the rotation shaft 98 in the drawing projects from this to the outside of the transmission 2. A lever-shaped connecting member 99 is fixed to the left end of the rotation shaft 98 in the figure, and one end of the cable wire 9a of the push-pull cable 9 is attached to the protruding end of the connecting member 99. connected. As is well known, the push-pull cable 9 is a cable member that can transmit operating force to both the push side and the pull side in the direction of extension of the cable wire 9a, and is connected to the starter motor 5 described later. .

In this configuration, when the cable wire 9a of the push-pull cable 9 is pulled to the left in the figure, the connecting member 99 rotates clockwise around the axis of the rotation shaft 98, and the rotation arm 97 also rotates clockwise. rotated in the circular direction. When the rotating arm 97 is rotated clockwise in this manner, the camshaft 93 is moved to the left in the figure, and the cam body 94 attached to the right end of the camshaft 93 is moved to the cam receiving member. It fits into the cam storage part 95a of 95. By fitting the cam body 94 into the cam storage portion 95a, the cam 94a of the cam body 94 presses the cam surface 83 of the parking pole 8 to the left in the figure. Accordingly, the parking pawl 8 rotates counterclockwise around the axis of the rotating shaft 91, and the teeth 8a of the parking pawl 8 mesh with (between) the teeth 6a of the parking gear 6.

From this state, when the cable wire 9a of the push-pull cable 9 is pushed to the right in the figure, the connecting member 99 rotates counterclockwise, and the rotating arm 97 also rotates counterclockwise accordingly. . When the rotating arm 97 is rotated counterclockwise in this manner, the camshaft 93 is moved to the right in the figure, and the cam body 94 is separated from the cam storage portion 95a of the cam receiving member 95. When the pressure from the cam 94a is removed, the arm portion 81 of the parking pawl 8 rotates clockwise by the restoring force of the return spring 92, and the engagement between the parking pawl 8 and the parking gear 6 is released. As described above, the parking pole 8 of this embodiment is configured so that it can be engaged with and disengaged from the parking gear 6 from outside the transmission 2. Further, the entire structure shown in FIG. 2 constitutes an output-side reciprocating mechanism 12 that reciprocates as the parking pole 8 and the parking gear 6 engage and disengage.

FIG. 3 is a configuration diagram showing an example of the starter motor 5. As shown in FIG. This starter motor 5 is configured to directly transmit the rotation of the armature 51 to the pinion 10, but a planetary gear mechanism is interposed between the armature 51 and the pinion 10 to reduce the rotation speed of the pinion 10 (pinion The basic structure of the reduction type starter motor that increases the rotational force of 10 is also the same. The figure shows a state in which the pinion 10 is not engaged with the ring gear 11 of the engine 1, and the ring gear 11 is provided, for example, on the outer periphery of a flywheel. Since this starter motor 5 is of a conventional type, its configuration will be briefly explained. When the start switch 3 in the figure is turned on, power from the battery 71 is supplied to the holding coil 52 and pull-in coil 53, and the electromagnetic force of these coils 52 and 53 causes the plunger 54 of the magnetic switch 50 to be attracted to the right in the figure. Then, the main switch 56 is closed by the contact plate 55 provided on the plunger 54, and as a result, the electric power from the battery 71 is supplied to the field coil 57, and the armature 51 rotates. In conjunction with the movement of the plunger 54, the shift lever 58 pushes the pinion 10 along with the overrunning clutch 59 to the left in the figure using the principle of leverage, whereby the pinion 10 meshes with the ring gear 11. Note that after the main switch 56 is closed, current no longer flows through the pull-in coil 53, but current continues to flow through the holding coil 52, and the plunger 54 is held by the electromagnetic force of the holding coil 52, and power is supplied to the field coil 57. continues to be supplied. When the start switch 3 is turned off, the electromagnetic force of the coils 52 and 53 disappears, and the restoring force of the return spring 60 returns the plunger 54 to the left in the figure, and at the same time, the meshing between the pinion 10 and the ring gear 11 is released. be done.

In this embodiment, the shift lever 58 is extended to the side opposite to the pinion 10, and the other end of the cable wire 9a of the push-pull cable 9 is connected to the extended tip of the shift lever 58. In this embodiment, when the pinion 10 goes from being separated from the ring gear 11 to being engaged, the cable wire 9a of the push-pull cable 9 is pulled, and when the engagement between the pinion 10 and the ring gear 11 is released, The cable wire 9a of the push-pull cable 9 is pushed. The pinion 10 is pushed toward the ring gear 11 (moves to the left) or is pulled back from the ring gear 11 (moves to the right). Since it reciprocates left and right, the entire structure shown in FIG. 3 constitutes an input side reciprocating mechanism 13 that reciprocates in conjunction with the movement of the pinion 10 toward the ring gear 11 side.

The input-side reciprocating mechanism 13 and the output-side reciprocating mechanism 12 shown in FIG. 2 are connected by a push-pull cable 9, which is an interlocking mechanism, and are configured to interlock with each other. That is, when the pinion 10 is engaged with the ring gear 11 from a state where it is separated from the ring gear 11 as shown in FIG. The cable wire 9a of the cable 9 is pulled, thereby rotating the connecting member 99 in FIG. 2 in the clockwise direction. When the connecting member 99 is rotated in the clockwise direction in this manner, the camshaft 93 is moved to the left in FIG. 8 is rotated counterclockwise, the teeth 8a of the parking pawl 8 mesh with the teeth 6a of the parking gear 6, and the rotation of the drive shaft in the transmission 2 is prevented. Therefore, since rotation of the drive shaft within the transmission 2 is prevented, the vehicle does not move unnecessarily.

On the other hand, when the pinion 10 and ring gear 11 are separated from each other after starting the engine 1, the cable wire 9a of the push-pull cable 9 connected to the extended end of the shift lever 58 is pushed. As a result, the connecting member 99 in FIG. 2 is rotated counterclockwise. When the connecting member 99 is rotated counterclockwise in this manner, the camshaft 93 is moved to the right in FIG. It is rotated clockwise by the restoring force, and the engagement between the parking pawl 8 and the parking gear 6 is released, and the driving force becomes ready to be transmitted within the transmission 2.

As described above, in the transmission parking mechanism of this embodiment, the parking pole 8 is connected to the parking gear 6 only when the pinion 10 is engaged with the ring gear 11 of the engine 1 by the starter motor 5, that is, when the engine 1 is started. Since they are engaged and prevent rotation of the drive shaft, unnecessary movement of the vehicle is avoided. At this time, the driver only performs an operation necessary to start the engine, such as turning on the start switch 3, and does not need to perform a separate operation to lock the parking mechanism.

In addition, with a simple configuration in which the input side reciprocating mechanism and the output side reciprocating mechanism are connected and interlocked by an interlocking mechanism, there is no need to perform any operation to lock the parking mechanism, and the vehicle can be easily moved when the engine is started. This makes it possible to prevent unnecessary movement of the

In addition, by connecting the input-side reciprocating mechanism and the output-side reciprocating mechanism with a push-pull cable 9 that can transmit operating force to both the push side and the pull side, interlocking mechanisms such as complex link mechanisms can be used. Unnecessary movement of the vehicle when starting the engine can be prevented without the need for Further, since the push-pull cable 9 can be freely routed, there are few restrictions on layout.

Although the transmission parking mechanism according to the embodiment has been described above, the present invention is not limited to the configuration described in the above embodiment, and various changes can be made within the scope of the gist of the present invention. . For example, in the above embodiment, the parking gear 6 and the parking pole 8 constituting the parking mechanism are of an existing type. , can be mutually triangular, and by doing so, more rapid engagement can be expected than with square teeth.

Further, in the above embodiment, the input side reciprocating mechanism 13 and the output side reciprocating mechanism 12 are connected by the push-pull cable 9 and are configured to interlock with each other, but the interlocking mechanism that connects and interlocks the two includes: For example, it is also possible to use a link mechanism. However, if the interlocking mechanism is constructed using the push-pull cable 9, there are advantages in that the structure is simple and there are fewer restrictions on layout.

1 Engine 2 Transmission 3 Start switch 5 Starter motor 6 Parking gear 7 Output shaft (driving force transmission path)
8 Parking pole 9 Push-pull cable (interlocking mechanism)
10 Pinion 11 Ring gear 12 Output side reciprocating mechanism 13 Input side reciprocating mechanism

Claims (3)

In the transmission parking mechanism that prevents transmission of driving force from the transmission,
a parking gear provided in a driving force transmission path of the transmission and rotated as the driving force is transmitted;
a parking pole that can be engaged with the parking gear and that can be operated from outside the transmission to engage and release the engagement with the parking gear;
A parking pawl operating mechanism interlocks with the operation of a pinion of a starter motor for starting the engine, and engages the parking pawl with the parking gear while the pinion is in mesh with the ring gear of the engine. transmission parking mechanism. The parking pole operating mechanism includes:
an input side reciprocating mechanism that reciprocates in conjunction with the movement of the pinion toward the ring gear;
an output side reciprocating mechanism that reciprocates in conjunction with the engagement and release of the parking pole with the parking gear;
an interlocking mechanism that connects and interlocks the input side reciprocating mechanism and the output side reciprocating mechanism so that the parking pole meshes with the parking gear in a state where the pinion advances toward the ring gear side. The transmission parking mechanism according to claim 1, characterized in that: 3. The transmission parking mechanism according to claim 2, wherein the interlocking mechanism is comprised of a push-pull cable.

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