JP2014228055A - Parking lock mechanism and release method thereof - Google Patents

Abstract

A parking lock capable of accurately detecting a state in which a parking lock cannot be released when a driver operates the shift lever with the intention of releasing the parking lock. A mechanism and its release method are provided. A release standby mechanism 21 having a spring spring 20 is provided between a shift lever 11 and a detent plate 15. When the shift lever 11 is operated to the P range, the spring spring 20 is not deformed and parking. When the pawl 19 is engaged with the parking gear 10 and the shift lever 11 is operated to the R range, the spring spring 20 is deformed even when the engaging portion of the parking pawl 19 does not come off from the parking gear 10, The shift lever 11 is configured to be movable from the P range to the R range. [Selection] Figure 1

Description

  The present invention relates to a parking lock mechanism that lifts a parking pole by a cam member and engages a parking gear, and then self-holds the engaged state by a friction holding force generated on the upper and lower surfaces of the cam member, Regarding release method.

  In a passenger car, a driver's operation is converted into an electric signal, and a shift operation is performed by driving a driving device such as an actuator based on the electric signal. The vehicle speed change operation or the like is not a shift-by-shift type, but is operated by a mechanical mechanism with an emphasis on operability. For example, when the driver shifts the shift lever to the parking (P) range, reverse (R) range, neutral (N) range, drive (D) range, etc., the operating force is applied to the wire or rod. It is transmitted directly to the parking lock mechanism and manual bubble by the transmission mechanism.

  This parking lock mechanism is used when the vehicle is stopped once on a slope, and when the shift lever is set to the P range, the parking gear in the transmission is locked and the drive wheels are locked, so that the vehicle This is a mechanism that prevents inadvertent movement (see, for example, Patent Document 1).

  Here, the operation of the conventional parking lock mechanism will be described. As shown in FIG. 10, in the parking lock mechanism 1X, when the driver moves the shift lever 11 to the P range, the operation is transmitted from the transmission mechanism 12 to the rotation member 13, and the rotation member 13 rotates. The detent plate 15 rotates according to the movement. Then, the parking rod 18 advances in the direction of pushing the cam member 17 by the rotation of the detent plate 15.

  At this time, if it is the timing at which the concave portion of the parking gear 10 and the engaging portion of the parking pole 19 are engaged, the parking pole 19 is lifted by the cam member 17 and the parking gear 10 is locked. On the other hand, if it is a timing that cannot be engaged, the cam spring 16 contracts and accumulates an urging force. When the urging force comes, the cam member 17 lifts the parking pole 19 and the parking gear 10 is locked. Is done.

  If the parking gear 10 is locked when the vehicle stops on a slope or the like, a torque T that increases in proportion to the slope of the slope or the vehicle weight is generated in the parking gear 10. At this time, the parking pole 19 receives a load from the parking gear 10 and tries to rotate in a direction to exit. Then, a withdrawal force F1 is generated at the tip of the parking pole 19. The withdrawal force F1 is proportional to the torque T generated in the parking gear 10 and inversely proportional to the radius R of the parking gear 10. In such a case, the frictional holding force F2 of the cam member 17 increases, and the cam member 17 cannot be removed, so that the lock cannot be released.

  In particular, when the shift lever 11 and the detent plate 15 are directly connected by a mechanical mechanism such as the transmission mechanism 12, the shift lever 11 cannot be moved when the above-described state occurs. In the worst case, the lock cannot be released by human power, or the parking lock mechanism 1 is damaged.

In order to avoid such a state, for example, it is necessary to increase the radius R of the parking gear 10 or to lengthen the shift lever 11, but in this case, the size increases, the layout deteriorates, and Degradation of operability is caused.

  In the first place, when the shift lever 11 can no longer be moved, there is no way to convey that the driver intends to release the parking lock, and whether the driver wants to release the parking lock or to continue. Cannot be detected. Therefore, even if the driver intends to release the parking lock, the parking lock cannot be released once the shift lever 11 cannot be moved as described above.

Japanese Utility Model Publication No. 64-47473

  The present invention has been made in view of the above problems, and the problem is that when the driver intends to release the parking lock and operates the shift lever, the parking lock cannot be released. It is to provide a parking lock mechanism that can accurately detect the state when it occurs, and to quickly avoid the state when a state in which the parking lock cannot be released is detected. It is providing the parking lock mechanism which can perform, and its cancellation | release method.

  A parking lock mechanism according to the present invention for solving the above-described problems has a rotating member that is connected to an operating tool and causes rotation by the operation of the operating tool, and a plurality of recesses that can be engaged with a detent spring. A detent plate that can be rotated by the rotating member, a parking rod that has a cam member that is biased by a cam spring at one end, and moves forward and backward by the rotation of the detent plate, and a rotating shaft of the transmission A parking lock mechanism having an engaging portion that engages with a concave portion between teeth of a parking gear fixed to the parking gear, and a parking pole that engages with the parking gear by the cam member; A release standby mechanism having an elastic body between the cam spring and the release standby mechanism when the operation tool is operated to a parking lock position. When the elastic body is not deformed and the parking pawl is engaged with the parking gear, and the operating tool is operated to the parking lock release position, the engaging portion of the parking pawl does not come off from the parking gear. Even in the state, the elastic body of the release standby mechanism is deformed so that the operation tool can be moved to the parking lock release position.

  The operation tool here refers to, for example, a shift lever. In the present invention, the shift lever, the rotating member, and the detent plate are directly connected by a transmission mechanism such as a wire or a rod. It can be applied to what is. The parking lock position refers to, for example, the P range, and the parking lock release position refers to, for example, the R range.

  According to this configuration, when the parking lock is to be released and the engagement portion of the parking pole cannot be removed from the parking gear, the elastic body of the release standby mechanism is deformed, so that the operation tool is moved to the parking lock release position. However, the driver is willing to release the parking lock, but the parking gear receives torque due to the slope of the hill and the vehicle weight. It can be easily and accurately detected that the parking pole is in a state where it does not come off the parking gear.

  Thus, if it can be detected that torque is generated in the parking gear, the engaging portion of the parking pole can be removed from the parking gear by starting an operation to cancel the torque.

  In addition, by deforming the elastic body of the release standby mechanism, the biasing force of the elastic body is applied in the direction of pulling out the cam member, and the force for pulling out the cam member increases, so that the parking lock can be easily released.

  In the parking lock mechanism, the release standby mechanism is provided between the detent plate and the operation tool with respect to the urging force of the elastic body in the direction in which the cam member is moved when the operation tool is operated. When the biasing force of the elastic body is larger than each of the biasing force of the cam spring and the biasing force of the detent spring, and the release standby mechanism is provided between the cam spring and the detent plate, If the urging force of the elastic body is made larger than the urging force of the cam spring and smaller than the urging force of the detent spring, there is a problem in parking lock even if the release standby mechanism is made of only the elastic body. Not.

  For example, when the parking lock is performed, the cam spring is contracted before the elastic body of the release standby mechanism, so that the parking pole can be engaged with the parking gear as described in the prior art. On the other hand, when releasing the parking lock, only the elastic body is deformed when the parking gear is not released from the parking pole, so that the operating tool can be moved to the parking lock releasing position.

  In addition, in the parking lock mechanism described above, the release standby mechanism includes the elastic body and a one-way deformation limiting member that limits deformation of the elastic body in one direction, and the parking pole is used as the parking gear. With respect to the direction of engagement, the deformation of the elastic body is limited by the one-way deformation limiting member, and the direction in which the parking pole is pulled out from the parking gear is not limited by the one-way deformation limiting member, If the elastic body is configured to be deformed, the deformation of the elastic body can be limited by the one-way deformation limiting member when the parking lock is performed.

  For example, when the parking lock is performed, the elastic body is not deformed by the restriction of the one-way deformation restricting member, and the parking pole is engaged with the parking gear as described in the prior art. On the other hand, when the parking lock is released, the elastic body is deformed, so that the operating tool can be moved to the parking lock release position even when the engaging portion of the parking pole cannot be removed from the parking gear.

  The parking lock mechanism further includes an operation position detection device that detects a position of the operation tool, and an engagement detection device that detects engagement between the parking pole and the parking gear, and the operation position detection. When the device detects that the position of the operation tool is the parking lock release position, and the engagement detection device detects that the parking pole and the parking gear are engaged, If it is configured with a notification device that notifies the driver of the state, the notification device can apply the brake to the driver when the driver is willing to release the parking lock and the parking lock cannot be released. Can be aroused.

For example, if the driver intends to release the parking lock and the parking lock cannot be released, the vehicle may move when releasing the brake unless the brake is applied. However, if the brake is applied, the vehicle will not move and it is safe.
Therefore, if the brake is not applied to the vehicle, the notification device alerts the driver to apply the brake, and the driver operates the brake pedal or the brake lever.

  Note that it is possible to detect whether or not the brake is being applied to the vehicle by detecting whether or not the brake pedal or the brake lever is being operated before the alarm device alerts the driver to apply the brake. Good.

  In addition, the parking lock mechanism includes an operation position detection device that detects a position of the operation tool, an engagement detection device that detects engagement of the parking pole and the parking gear, and the operation position. When the detection device detects that the position of the operation tool is the parking lock release position, and the engagement detection device detects that the parking pole and the parking gear are engaged. When the control device for controlling the torque generated in the parking gear is provided, it is possible to easily detect a state in which the engagement of the parking pole and the parking gear does not follow the operation of the operation tool. If this condition is detected, control is performed to release the torque applied to the parking gear, and the force that pulls the cam member with the elastic force of the release standby mechanism. Combined with the increased, it is possible to easily release the parking lock.

  The parking lock mechanism releasing method of the present invention for solving the above-described problem includes a rotating member that is connected to an operating tool and is caused to rotate by an operation of the operating tool, and a plurality of detent springs that can be engaged with the rotating member. A detent plate having a recess and rotatable by the rotating member, a parking rod having a cam member biased by a cam spring at one end, and moving forward and backward by the rotation of the detent plate, and a transmission A parking lock mechanism having an engagement portion that engages with a recess between teeth of a parking gear fixed to a rotating shaft of the parking gear, and a parking pole that engages with the parking gear by the cam member When the operation tool is operated to the parking lock release position, the engagement portion of the parking pole does not come out of the parking gear. The elastic body provided in the release standby mechanism provided between the operation tool and the cam spring is deformed, and the operation tool remains in a state where the engagement portion of the parking pole does not come off from the parking gear. Is moved to the parking lock release position.

  In the parking lock mechanism release method, the operation position detection device that detects the position of the operation tool detects that the position of the operation tool is the parking lock release position, and When an engagement detection device that detects engagement with the parking gear detects that the parking pole and the parking gear are engaged, it is desirable to notify the driver of the state.

  In addition, in the parking lock mechanism release method, the operation position detection device that detects the position of the operation tool detects that the position of the operation tool is the parking lock release position, and the parking pole When the engagement detection device that detects the engagement between the parking gear and the parking gear detects that the parking pawl and the parking gear are engaged, the torque generated in the parking gear is canceled out. It is desirable.

  According to the present invention, the elastic body of the release standby mechanism is deformed, so that the operation tool is located at the parking lock release position, but the engagement state between the parking pole and the parking gear is not released, The driver is willing to release the parking lock, but it is possible to accurately detect that the parking gear is torqued by the slope of the hill or the vehicle weight and the parking pole is not released from the parking gear. .

  Accordingly, the parking lock can be easily released by alerting the driver to apply the brake or performing control to release the torque applied to the parking gear.

It is a block diagram which shows the parking lock mechanism of 1st embodiment which concerns on this invention. It is a perspective view which shows the parking lock mechanism of 2nd embodiment which concerns on this invention. It is a block diagram which shows the parking lock mechanism of 3rd embodiment which concerns on this invention. It is a perspective view which shows the parking lock mechanism of 4th embodiment which concerns on this invention. It is an arrow line view which shows the arrow V shown in FIG. It is the flowchart which showed the control method of the parking lock mechanism shown in FIG. It is a block diagram which shows the 1st step of the operation | movement which cancels | releases the parking lock of the parking lock mechanism shown in FIG. It is a block diagram which shows the 2nd step of the operation | movement which cancels | releases the parking lock of the parking lock mechanism shown in FIG. It is a block diagram which shows the 3rd step of the operation | movement which cancels | releases the parking lock of the parking lock mechanism shown in FIG. It is a block diagram which shows the conventional parking lock mechanism.

  Hereinafter, a parking lock mechanism according to an embodiment of the present invention will be described with reference to the drawings. In the embodiment, the operation tool, the rotating member, and the detent plate will be described as an example in which they are connected by a mechanical mechanism such as a wire or a rod. The mechanical mechanism is not particularly limited, and is indicated by a thick dotted line in FIGS. 1, 3, and 7 to 9, and detailed description thereof is omitted.

  Further, the arrangement of the shift lever is not particularly limited, but in the following embodiment, the parking lock position is the parking (P) range and the parking lock releasing position is the reverse (R) range.

  First, a parking lock mechanism according to a first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, a vehicle in which a parking lock mechanism 1 is mounted uses a driving force of an engine (internal combustion engine) 2 via a clutch 3 and a gear portion 4 a of a transmission (transmission) 4 to provide a propeller shaft (rotary shaft). The drive wheel 8 is driven from the propeller shaft 5 through the differential 6 and the drive shaft (drive shaft) 7. At this time, the connecting / disconnecting operation of the clutch 3 and the shifting operation of the gear portion 4a are controlled by a TCM (transmission control module; control device) 9.

  The parking lock mechanism 1 of the present invention is a mechanism for locking a parking gear 10 provided on the propeller shaft 5, and includes a shift lever (operation tool) 11, a transmission mechanism (mechanical mechanism) 12 such as a wire or a rod, a rotation mechanism. A moving member 13, a detent spring 14, a detent plate 15, a cam spring 16, a cam member 17, a parking rod 18, and a parking pole 19 are provided.

  The rotation member 13 is connected to a shift lever (operation tool) 11 by a transmission mechanism (mechanical mechanism) 12 such as a wire or a rod, and is configured to cause rotation by operation of the shift lever 11. The detent spring 14 can be engaged with the plurality of recesses 15a of the detent plate 15, and is configured to urge the detent plate 15 from above so that the detent plate 15 rotates correctly. The detent plate 15 is configured to move the parking rod 18 forward and backward by rotating itself.

  The parking rod 18 is configured by providing a cam member 17 biased by a cam spring 16 at one end. The parking pole 19 includes an engaging portion 19 a that engages with the concave portion 10 b of the inter-tooth 10 a of the parking gear 10, and a tip portion 19 b that contacts the cam member 17. These configurations are not particularly limited as long as the parking lock mechanism is a known technology.

  The parking lock mechanism 1 includes a release standby mechanism 21 having a spring spring (elastic body) 20 between the shift lever 11 and the detent plate 15, specifically in the middle of the transmission mechanism 12. When operated to the P range (parking lock position), the spring spring 20 is not deformed, the parking pole 19 is engaged with the parking gear 10, and the shift lever 11 is operated to the R range (parking lock release position). Sometimes, even when the engaging portion of the parking pole 19 does not come off the parking gear 10, the spring spring 20 is deformed so that the shift lever 11 can be moved from the P range to the R range.

  The release waiting mechanism 21 functions as a mechanism for waiting for the cam spring 16 to wait for the timing when the parking pawl 19 and the parking gear 10 are engaged when the parking lock is engaged, whereas the parking pawl 19 is operated when the parking lock is released. It is a mechanism that waits for the timing to exit.

  By providing the release standby mechanism 21, the spring spring 20 of the release standby mechanism 21 is deformed even when the engaging portion of the parking pole 19 does not come out of the parking gear 10 when the driver tries to release the parking lock. By doing so, the shift lever 11 can be moved from the P range to the R range.

  Thereby, although the driver has an intention to release the parking lock, the parking pole 19 does not come out of the parking gear 10 and the state in which the parking lock cannot be released can be accurately detected.

  Further, when the driver shifts the shift lever 11 from the P range to the R range, the spring spring 20 of the release standby mechanism 21 accumulates the urging force in the direction in which the cam member 17 is pulled out. The pulling force increases, and the cam member 17 can be pulled out easily.

  When the spring spring 20 of the release standby mechanism 21 is provided between the shift lever 11 and the detent plate 15, the urging force thereof is determined by the urging force of the cam spring 16 and the urging force of the detent spring 14, respectively. Is preferably set to be large.

  According to this configuration, at the time of parking lock, the cam spring 16 contracts before the spring spring 20 of the release standby mechanism 21, so that the parking pole 19 and the parking gear 10 can be engaged as described in the prior art. it can. On the other hand, when the parking lock is released, the spring spring 20 is extended, and the shift lever 11 can be moved from the P range to the R range as described above, and the biasing force of the spring spring 20 is applied. The force for pulling out the cam member 17 can be increased.

  When the release standby mechanism 21 is provided between the cam spring 16 and the detent plate 15, the biasing force is larger than the biasing force of the cam spring 16 and smaller than the biasing force of the detent spring 14. Is set.

  The parking lock mechanism 1 includes a position detection switch (operation position detection device) 22 that detects the position of the shift lever 11 and a lock detection switch (engagement detection) that detects engagement between the parking pole 19 and the parking gear 10. Device) 23, and when the position detection switch 22 detects that the position of the shift lever 11 is in the R range, the lock detection switch 23 is engaged with the parking pole 19 and the parking gear 10. When this is detected, an alarm buzzer (notification device) 24 for notifying the driver of the state is provided.

  The position detection switch 22 and the lock detection switch 23 are not particularly limited, but may be physically turned on and off like switches. For example, the position detection switch 22 is configured to be turned on when the shift lever 11 is in the P range and turned off when the shift lever 11 is in the R range, and the lock detection switch 23 is turned on when the parking lock is set. It is configured to turn OFF when is released.

  Therefore, when the position detection switch 22 is OFF and the lock detection switch 23 is ON, the signal is sent to the TCM 9, and the TCM 9 intends to release the parking lock, and the shift lever 11 is moved to the R range. However, it can be determined that the parking pole 19 cannot be removed from the parking gear 10.

  The alarm buzzer 24 is configured so that the driver can be notified by sound that the parking pole 19 has not been removed from the parking gear 10 even though the shift lever 11 has been moved to the R range. In this embodiment, the alarm buzzer 24 is provided as a notification device. However, the meter device 25 provided with a shift indicator, a warning lamp, and the like so that the driver can visually check such a state. A lamp or the like may be provided.

  In addition, in this parking lock mechanism 1, when the position detection switch 22 detects that the position of the shift lever 11 is in the R range, the lock detection switch 23 engages the parking pole 19 and the parking gear 10. TCM 9 detects the torque generated in parking gear 10 based on the detection signal of a sensor capable of detecting the torque generated in parking gear 10 such as G sensor (acceleration sensor) 30. It is configured to perform a canceling control.

  In addition, the TCM 9 connected to the accelerator sensor 32 that detects the operation of the accelerator pedal 31 is configured such that when the driver operates the shift lever 11 from the P range to the R range, the parking pole 19 is turned into the parking gear contrary to the operation. Parking lock state determination means M1 for determining whether or not the parking lock cannot be released without exiting 10 and when the parking lock state determination means M1 determines that the parking lock cannot be released, It comprises a notification means M2 that performs control to sound the alarm buzzer 24, and a torque cancellation means M3 that performs control to cancel the torque generated in the parking gear 10.

  The parking lock state determination means M1 is a means for determining, based on the position detection switch 22 and the lock detection switch 23, whether or not the driver's shift operation matches the parking lock state. For example, in this embodiment, when the position detection switch 22 is OFF and the lock detection switch 23 is ON, when the driver operates the shift lever 11 from the P range to the R range, parking is performed contrary to the operation. It is determined that the parking lock cannot be released without the pole 19 coming out of the parking gear 10.

  The notification means M2 controls the alarm lock buzzer 24 to sound when the parking lock state determination means M1 moves the shift lever 11 to the R range, but it is determined that the parking pole 19 cannot be removed from the parking gear 10. It is means to do. In addition, the notification means M2 moves the shift lever 11 to the R range when it is configured to sound the alarm buzzer 24 when the brake is not effective from the detection signals of the brake sensor 27 and the parking brake sensor 29. This is preferable because the alarm buzzer 24 sounds only when the pole 19 is determined not to be disengaged from the parking gear 10 and when the brake is not applied to the vehicle.

  According to the notification means M2, the driver has an intention to release the parking lock, and the driver can be informed that the parking lock is not released even if the shift lever 11 is moved to the R range. Thereby, it is possible to alert the driver to apply the brake.

  The torque canceling means M3 moves the shift lever 11 from the P range to the R range, but the parking pole 19 does not come out of the parking gear 10, and the brake is applied to the vehicle by either the brake pedal 26 or the brake lever 28. This means is used when it is effective, and is means for canceling the torque generated in the parking gear 10.

  The torque canceling means M3 is a G sensor 30 or the like for canceling the torque generated in the parking gear 10 when it is determined that the parking lock cannot be released and the vehicle is braked. In this embodiment, the G sensor 30 that is originally provided in the transmission 4 and senses the gradient so as to select the lowest gear of the gear portion 4a is used in this embodiment. Thus, it is configured to detect whether the state of the vehicle is up or down and to determine which direction the torque generated in the parking gear 10 is acting.

  If it is possible to detect in which direction the torque generated in the parking gear 10 is acting, a sensor outside the 30th position of the G sensor may be used.

  According to the torque canceling means M3, the state where the engagement of the parking pole 19 and the parking gear 10 does not follow the operation of the shift lever 11 is easily detected, and when this state is detected, The control that cancels the torque generated in the parking gear 10 is performed, and the parking lock can be easily released in conjunction with the increase in the force of pulling the cam member 17 by the spring spring 20 of the release standby mechanism 21.

  Next, a parking lock mechanism according to a second embodiment of the present invention will be described with reference to FIG. Note that the same configuration as in FIG. 1 is omitted. This parking lock mechanism 40 is replaced with a release standby mechanism 21 having a spring spring 20 provided in the middle of the transmission mechanism 12 of the first embodiment shown in FIG. And a detent waiting mechanism 42 having a torsion spring 41 between the detent plate 15 and the detent plate 15.

  In the parking lock mechanism 40, the rotating member 13 is connected to the rotating member main body 13a with the joint 13b connected to the shift lever 11, the shaft 13c loosely fitted to the detent plate 15, and one end of the torsion spring 41. And a fixing portion 13d to be fixed.

  One end of the torsion spring 41 is fixed by being inserted into an insertion hole 13e provided in the fixing portion 13d, and the other end is inserted and fixed in an insertion hole 15b provided in the detent plate 15. The rotating member 13 and the detent plate 15 are configured to be connected via a torsion spring 41 so that each of the rotating member 13 and the detent plate 15 can be rotated separately in the rotating direction. Configured.

  In this embodiment, the end portion of the torsion spring 41 is inserted and fixed to the insertion hole 13e and the insertion hole 15b, respectively. However, the present invention is not limited to this, for example, one end side of the torsion spring 41 is It may be fixed by being wound around the fixing portion 13d.

  In the parking lock mechanism of the prior art, the rotating member 13 and the detent plate 15 are integrally fixed parts, but in this second embodiment, the rotating member 13 and the detent plate 15 are rotated separately. It is comprised and the rotation is performed via the torsion spring 41.

  The parking lock mechanism 1 of the first embodiment shown in FIG. 1 and the parking lock mechanism 40 of the second embodiment shown in FIG. 2 are spring springs 20 or twists as elastic bodies of the release standby mechanisms 21 and 42. Although there is a difference with the spring 41, the operation is the same, but a configuration using a release standby mechanism 42 having a torsion spring 41 is preferable for reasons such as ease of incorporation of the apparatus.

  The urging force of the torsion spring 41 is preferably set to be larger than each of the urging force of the cam spring 16 and the urging force of the detent spring 14 as in the first embodiment.

  Next, a parking lock mechanism according to a third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, the parking lock mechanism 50 according to the third embodiment includes an abutting member (one-way deformation limiting member) 52 on a release standby mechanism 51 having a spring spring 20 in the middle of the transmission mechanism 12. It is prepared for.

  The abutting member 52 is a member that restricts deformation of the spring spring 20 that is an elastic body in one direction. When the shift lever 11 is moved from the R range to the P range by the abutting member 52, the spring spring 20 is not deformed by the abutting member 52 being abutted, while the shift lever 11 is moved from the P range to the R range. When moving to the range, the deformation is permitted when the abutting member 52 is separated.

  As a result, when the parking lock is performed, the spring spring 20 of the release standby mechanism 51 is not deformed and the cam spring 16 is contracted, and the parking pole 19 is engaged with the parking gear 10 as described in the prior art. On the other hand, when the parking lock is released, the spring spring 20 is deformed, so that the shift lever 11 can be moved to the R range even when the engaging portion of the parking pole 19 cannot be removed from the parking gear 10, and the spring. The force with which the cam member 17 is pulled out by the biasing force of the spring 20 can be increased.

  Next, a parking lock mechanism according to a fourth embodiment of the present invention will be described with reference to FIG. In addition to the configuration of the second embodiment shown in FIG. 2, the parking lock mechanism 60 of the fourth embodiment has an abutting member on a release standby mechanism 61 having a torsion spring 41 as shown in FIG. 4. 62 is provided.

  The torsion spring 41 of the release standby mechanism 61 is provided between the rotating member 13 and the detent plate 15, and is hooked in a state where one end side is in contact with the side surface of the fixed portion 13d so as to be twisted when the parking lock is released. The end side is inserted and fixed in an insertion hole 15 b provided in the detent plate 15.

In addition, although the one end side of the torsion spring 41 of this embodiment is configured to be hooked on the fixing portion 13d, the present invention is not limited to this, for example, as in the second embodiment, It is good also as a structure which provides the through-hole 13e in the fixing | fixed part 13d, inserts and fixes the one end side of the torsion spring 41, or winds and fixes one end side to the fixing | fixed part 13d.

  Further, the abutting member 62 of the release standby mechanism 61 limits the twisting direction of the torsion spring 41 to one direction. As shown in FIG. 5, the abutting member 62 includes an abutting body 62 a fixed to the back side of the detent plate 15, and a pivoting member 13 that protrudes from the back side of the detent plate 15 and is rotatably provided. The abutting pin 62b is inserted into the shaft 13c and fixed, and the abutting body 62a is provided with an abutting portion 62c that restricts the rotation of the abutting pin 62b to one section.

  The deformation of the torsion spring 41 is limited in one direction by the abutting member 62. However, when the initial setting load is not applied to the torsion spring 41, the abutting member 62 and the abutting member 62 are in a normal state when the parking lock is not performed. You may make it provide a play between the contact parts 62c. In this case, the torsion spring 41 is slightly deformed even when parking is locked.

  Preferably, the torsion spring 41 may be configured to limit the deformation of the torsion spring 41 in only one direction. In this case, the torsion spring 41 is assembled so as to have a predetermined initial set load. The rotating member 13 and the detent plate 15 are pressed by the pressing pin 62b being pressed against the contacting part 62c by the load.

  According to this configuration, when the parking lock mechanism 60 is normally operated, the rotating member 13 and the detent plate 15 operate integrally with the initial set load. On the other hand, when the driver tries to release the parking lock, When the engaging portion of the parking pole 19 cannot be removed from the parking gear 10, the torsion spring 41 is displaced when the operating force of the driver's shift lever 11 exceeds the initial set load, and the rotating member 13 and the detent plate 15 are displaced. Relative displacement occurs, and the shift lever 11 can be moved to the R range.

  Therefore, the initial set load of the torsion spring 41 is larger than the operating force of the driver's shift lever 11 at the normal time. On the other hand, when the driver tries to release the parking lock, the engaging portion of the parking pole 19 It is desirable to set so that the operating force of the driver's shift lever 11 becomes smaller when the vehicle does not come out of the parking gear 10.

  Thus, the operation feeling of the shift lever 11 can be improved by applying the initial set load to the torsion spring 41 and incorporating it.

  When the cam member 17 is inserted, the rotating member 13 and the detent plate 15 are pressed by the initial set load of the torsion spring 41, and the abutting pin 62b abuts against the abutting portion 62c of the abutting body 62a. When the shaft 13c rotates in the direction of the white arrow in FIG. 5, the abutment pin 62b directly rotates the detent plate 15.

  On the contrary, when the cam member 17 is pulled out and the shaft 13c rotates in the direction of the filled arrow in FIG. 5, the parking member 19 and the detent plate 15 are integrated when the parking pole 19 is easily detached from the parking gear 10. Works as. On the other hand, when the parking pole 19 cannot be removed from the parking gear 10, when the operating force of the driver's shift lever 11 becomes larger than the initial set load of the torsion spring 41, the abutment pin 62b is abutment portion 62c. The torque from the shaft 13 c is transmitted to the detent plate 15 via the torsion spring 41. At this time, the torsion spring 41 is twisted to cause relative displacement between the rotating member 13 and the detent plate 15, the shift lever 11 can be moved from the P range to the R range, and the cam member 17 is pulled out from the torsion spring 41. The urging force of the direction can be stored.

  Next, the operation of the parking lock mechanism according to the first to fourth embodiments of the present invention will be described with reference to the flowchart shown in FIG. 6 and FIGS. In the description of this operation, the parking lock mechanism 60 according to the fourth embodiment will be described as an example. However, since the first to third embodiments operate in substantially the same manner, the description thereof is omitted.

  The control method during parking lock of the parking lock mechanism 60 operates as described in the prior art by the abutting member 62 even if the release standby mechanism 61 is provided, and therefore the description thereof is omitted here. .

  As shown in FIG. 6, the control method for releasing the parking lock (the method for releasing the parking lock mechanism 60) first performs step S10 in which the driver operates the shift lever 11 from the P range to the R range. Until this step S10 is performed, both the position detection switch 22 and the lock detection switch 23 are ON, and the parking lock state determination means M1 of the TCM 9 has no intention to release the parking lock and the parking lock is performed. It is recognized as a state. In step 10, when the shift lever 11 is operated from the P range to the R range, the position detection switch 22 is turned off as shown in FIG. At this time, the urging force F3 is stored in the torsion spring 41 of the release standby mechanism 61 in the direction in which the cam member 17 is pulled out. As a result, the parking rod 18 retains a force for pulling the cam member 17 due to the tension of the torsion spring 41.

  Next, the parking lock state determination means M1 of the TCM 9 performs step S20 for determining whether or not the parking lock is released, that is, whether or not the parking pole 19 has come out of the parking gear 10. In this step S20, when the lock detection switch 23 is OFF, since both the position detection switch 22 and the lock detection switch 23 coincide with each other in the OFF state, it is determined that the parking pole 19 has left the parking gear 10 (YES). This control method is complete.

  If the lock detection switch 23 is ON in step S20, the detection results of the position detection switch 22 and the lock detection switch 23 are different, so it is determined that the parking pole 19 has not come off the parking gear 10 (NO). At this time, the position detection switch 22 is OFF and the driver intends to release the parking lock, and has moved the shift lever 11 to the R range, but the lock detection switch 23 is ON and the parking pole 19 is in the parking gear. 10 is not missing.

  If NO is determined in step S20, then the notification unit M2 performs step S30 for determining whether or not the brake is applied to the vehicle. In step S30, if either one of the brake sensor 27 and the parking brake sensor 29 is ON, it is determined that the brake is effective (YES), and the process proceeds to step S50. On the other hand, if both the brake sensor 27 and the parking brake sensor 29 are OFF, it is determined that the brake is not effective (NO).

  If NO is determined in step S30, next, the notification unit M2 performs step S40 for sounding the alarm buzzer 24. In this step S40, the driver is informed that the parking pole 19 is not pulled out of the parking gear 10 against the intention of releasing the parking lock of the driver, and at the time of releasing the parking lock to the driver. , Can be urged to apply the brakes. In this embodiment, the alarm buzzer 24 is sounded to alert the driver to apply the brake, but the meter device 25 may be lit with a warning display lamp.

  Although step S40 is performed after step S30, the driver intends to release the parking lock before performing step S30, and the shift lever 11 is moved to the R range, but the parking pole 19 is parked. You may comprise so that the alarm buzzer 24 may sound so that the state which has not pulled out from the gear 10 may be alert | reported.

  After the alerting to the driver is completed in step S40, step S30 is performed again to determine whether or not the brake is effective. If it is determined that the brake is effective, then the parking gear 10 is generated. Step S50 for detecting the direction of the torque T is performed. In step S50, the G sensor 30 is used to detect the vehicle gradient and detect the direction of the torque T. The step S50 only needs to be able to detect the direction of the torque T generated in the parking gear 10. For example, a torque sensor is provided in the parking gear 10, and the direction of the torque T is detected based on the torque sensor. Also good.

  Next, step S60 is performed in which the gear stage of the gear portion 4a of the transmission 4 is selected so that the power of the engine 2 is transmitted in a direction to cancel the torque T generated in the parking gear 10, and the gear stage 4a is shifted to the selected gear stage. Do. In this step S60, for example, if the vehicle is tilted upward, the drive gear is selected, while if the vehicle is tilted downward, the reverse gear is selected.

  If the vehicle is a hybrid vehicle equipped with a traveling motor in addition to the engine, in this step S60, the traveling motor is controlled to drive in a direction to cancel the torque T generated in the parking gear 10. May be.

  After the gear shift is completed in step S60, step S70 for gradually engaging the clutch 3 is performed. In this step S70, as shown in FIG. 8, a canceling torque T 'for canceling the torque T is generated in the propeller shaft 5, and the torque T generated in the parking gear 10 is gradually canceled. Accordingly, the pull-out force F1 applied to the tip 19b of the parking pole 19 and the friction holding force F2 of the cam member 17 also start to decrease.

  In step S10, the shift lever 11 is moved from the P range to the R range, and the torsion spring 41 of the release standby mechanism 61 stores the urging force F3 in the direction in which the cam member 17 is pulled out. Therefore, when the biasing force F3 wins the friction holding force F2 of the cam member 17, the cam member 17 is pulled out by the biasing force F3, and the parking lock is released as shown in FIG. When the parking lock is released, the lock detection switch 23 is turned off, and when both the position detection switch 22 and the lock detection switch 23 are turned off, the control method is completed.

  According to this control method, when the driver intends to release the parking lock and operates the shift lever 11, when the state in which the parking lock cannot be released occurs, the state is accurately detected. be able to.

  Further, when the state is detected, control to cancel the torque T generated in the parking gear 10 is performed, and the force for pulling the cam member 17 by the biasing force F3 of the torsion spring 41 of the release standby mechanism 61 is increased. In combination, the parking lock can be easily released.

  As a result, the parking lock can be released even if the force necessary to release the parking lock increases extremely without increasing the size of the parking gear 10 or the lever ratio of the shift lever 11. It is possible to prevent the vehicle from running badly and the parking lock mechanism 60 from being damaged.

  Also, when releasing the parking lock, the alarm buzzer 24 alerts the driver to apply the brake and confirms that the brake is applied, so the parking lock can be safely performed without moving the vehicle. It can be canceled.

  The configuration and the control method described above have been described by taking the parking lock mechanism 1, 40, 50, and 60 in which the shift lever 11 and the detent plate 15 are connected by a mechanical mechanism as an example. The shift lever 11 and the detent plate 15 are not connected by a mechanical mechanism, and include an actuator that is driven by an operation signal of the shift lever 11 or the shift button, and the so-called shift-by that rotates the detent plate 15 by the actuator. This is a problem common to the shift type parking lock mechanism.

  Therefore, even in the shift-by-shift parking lock mechanism, if the driver is willing to release the parking lock and the parking lock cannot be released for the same reason even if the shift lever 11 or the shift button is operated. By performing the above control, the problem can be solved.

  In the parking lock mechanism of the present invention, the elastic body of the release standby mechanism is deformed so that the operating tool is positioned at the parking lock release position, but the engagement state between the parking pole and the parking gear is not released. In fact, the driver is willing to release the parking lock, but the parking gear has torque due to the slope of the slope and the weight of the vehicle, and it is accurately detected that the parking pole is not released from the parking gear. Therefore, it can be used for a large vehicle such as a truck in which an operation tool and a detent plate are directly joined by a mechanical mechanism.

1, 40, 50, 60, 1X Parking lock mechanism 2 Engine (internal combustion engine)
3 Clutch 4 Transmission (transmission)
5 Propeller shaft (rotating shaft)
10 Parking gear 11 Shift lever (operating tool)
12 Transmission mechanism 13 Rotating member 14 Detent spring 15 Detent plate 16 Cam spring 17 Cam member 18 Parking rod 19 Parking pole 20 Spring spring (elastic body)
21, 42, 51, 61 Release standby mechanism 22 Position detection switch (operation position detection device)
23 Lock detection switch (engagement detection device)
24 Alarm buzzer (notification device)
25 Meter device 27 Brake sensor 29 Parking brake sensor 30 G sensor 41 Torsion spring (elastic body)
52, 62 Abutting member (unidirectional deformation limiting member)
M1 Parking lock state determining means M2 Notifying means M3 Torque canceling means

Claims (8)

A rotating member connected to the operating tool and caused to rotate by operation of the operating tool, a detent plate having a plurality of recesses engageable with a detent spring, and rotatable by the rotating member, and one end A cam member biased by a cam spring is provided at the portion, and engages with a parking rod that moves forward and backward by rotation of the detent plate, and a recess between teeth of a parking gear that is fixed to the rotating shaft of the transmission. In a parking lock mechanism comprising an engagement portion, and a parking pawl that engages with the parking gear by the cam member,
A release standby mechanism having an elastic body between the operation tool and the cam spring;
When the operation tool is operated to the parking lock position, the elastic body of the release standby mechanism is not deformed, the parking pawl is engaged with the parking gear,
On the other hand, when the operation tool is operated to the parking lock release position, the elastic body of the release standby mechanism is deformed even when the engagement portion of the parking pole does not come off from the parking gear. A parking lock mechanism configured to be movable to the parking lock release position. Regarding the biasing force of the elastic body with respect to the direction in which the cam member is moved when the operation tool is operated,
When the release standby mechanism is provided between the detent plate and the operation tool, the biasing force of the elastic body is made larger than each of the biasing force of the cam spring and the biasing force of the detent spring, and the release standby mechanism Is provided between the cam spring and the detent plate, the biasing force of the elastic body is larger than the biasing force of the cam spring and smaller than the biasing force of the detent spring. The parking lock mechanism according to Item 1. The release standby mechanism includes the elastic body, and a unidirectional deformation limiting member that limits deformation of the elastic body in one direction,
The one-way deformation limiting member restricts deformation of the elastic body in the direction in which the parking pole is engaged with the parking gear, and the one-way deformation in the direction in which the parking pole is pulled out of the parking gear. The parking lock mechanism according to claim 1, wherein the elastic body is configured to be deformed without being restricted by a restriction member. An operation position detection device for detecting the position of the operation tool; and an engagement detection device for detecting engagement between the parking pole and the parking gear;
When the operation position detection device detects that the position of the operation tool is the parking lock release position, the engagement detection device detects that the parking pole and the parking gear are engaged. The parking lock mechanism according to any one of claims 1 to 3, further comprising a notification device that notifies a driver of the state when the vehicle is in operation. An operation position detection device for detecting the position of the operation tool; and an engagement detection device for detecting engagement between the parking pole and the parking gear;
When the operation position detection device detects that the position of the operation tool is the parking lock release position, the engagement detection device detects that the parking pole and the parking gear are engaged. The parking lock mechanism according to any one of claims 1 to 4, further comprising a control device that performs control to cancel torque generated in the parking gear when the parking gear is engaged. A rotating member connected to the operating tool and caused to rotate by operation of the operating tool, a detent plate having a plurality of recesses engageable with a detent spring, and rotatable by the rotating member, and one end A cam member biased by a cam spring is provided at the portion, and engages with a parking rod that moves forward and backward by rotation of the detent plate, and a recess between teeth of a parking gear that is fixed to the rotating shaft of the transmission. In a method for releasing a parking lock mechanism comprising an engagement portion and a parking pawl that engages with the parking gear by the cam member,
When the operation tool is operated to the parking lock release position, the release waiting mechanism provided between the operation tool and the cam spring is provided in a state where the engaging portion of the parking pole does not come off from the parking gear. A parking lock release method, wherein the operation tool is moved to the parking lock release position in a state in which an elastic body is deformed and the engagement portion of the parking pole does not come off the parking gear.   When the operation position detection device that detects the position of the operation tool detects that the position of the operation tool is the parking lock release position, and the engagement detects the engagement between the parking pole and the parking gear. The parking lock mechanism releasing method according to claim 6, wherein when the detection device detects that the parking pole and the parking gear are engaged, the state is notified to a driver. .   When the operation position detection device that detects the position of the operation tool detects that the position of the operation tool is the parking lock release position, and the engagement detects the engagement between the parking pole and the parking gear. 8. The torque according to claim 6, wherein when the detection device detects that the parking pole and the parking gear are engaged, the torque generated in the parking gear is canceled. How to release the parking lock mechanism.

Images