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CN-117927104-B - Door lock device for vehicle

CN117927104BCN 117927104 BCN117927104 BCN 117927104BCN-117927104-B

Abstract

The present invention provides a door lock device for a vehicle, which optimizes the layout of a motor and components related to the motor, simplifies the structure and can be miniaturized. A door lock device for a vehicle is provided with a housing including a base (5), a latch (6) rotatably supported by the base via a shaft oriented in the vertical direction, a ratchet (7) rotatably supported by the base via a shaft oriented in the vertical direction, a motor (18) disposed on the housing (17) such that the rotation shaft is oriented in the horizontal direction, and a lead screw (19) rotatably supported by the housing such that the rotation axis direction is oriented in the horizontal direction, wherein the door lock device has a gear portion (191) that meshes with a pinion of the motor and a spiral groove portion in which an operated portion (72) provided in the ratchet is directly engaged, and the ratchet is moved from an engagement position to a release position by one-time rotation of the rotation shaft of the motor.

Inventors

  • YOKOTA YOSHIAKI

Assignees

  • 三井金属爱科特株式会社

Dates

Publication Date
20260505
Application Date
20231020
Priority Date
20221024

Claims (14)

  1. 1. A door lock device for a vehicle is characterized in that, The door lock device for a vehicle includes: A housing comprising a base secured to either the door or the body; A latch rotatably supported by the base body by a latch shaft oriented in a vertical direction, the latch being capable of engaging with a striker provided to the other of the door or the vehicle body when the door is closed; A ratchet rotatably supported by the base body by a ratchet shaft in a vertical direction, the ratchet being configured to hold the latch at a locking position at an engagement position with the latch, and to be movable in a release direction from the engagement position to be released from the latch and rotatable to a release position at which the latch is movable to an unlocking position; A motor disposed in the housing such that a rotation axis thereof is oriented in a lateral direction, a pinion gear being fixed to the rotation axis, and A lead screw rotatably supported by the housing so that a rotation axis thereof is directed in the left-right direction, the lead screw having a gear portion engaged with the pinion gear and a spiral groove portion for direct engagement with an operated portion provided at a rear end of the ratchet, the lead screw being configured to move the ratchet from the engagement position to the release position by once rotating the rotation shaft in one direction, The lead screw is arranged between the motor and the latch and the ratchet so that the gear portion is located on the latch side and is arranged outside the movement range of the latch in a plan view, The lead screw has a slit extending in a rotation axis direction and conforming to a track of the operated portion of the ratchet when the lead screw is in a neutral position, When the lead screw is at the neutral position, the operated portion of the ratchet can be freely moved in the slit along the rotation axis direction.
  2. 2. The door lock device for a vehicle according to claim 1, wherein, The lead screw is rotated once in one direction from the neutral position by the rotation of the rotation shaft, and is brought into contact with the operated portion of the ratchet wheel, thereby stopping at the neutral position.
  3. 3. The door lock device for a vehicle according to claim 2, wherein, The lead screw has an elastic portion that is configured to drop into an engagement groove provided in the housing in the neutral position, so that the lead screw can be held in the neutral position.
  4. 4. The door lock device for a vehicle according to claim 3, wherein, The engagement groove is formed in such a manner that the lead screw is rotated in one direction and prevented from rotating in the other direction, which is the opposite direction of the one direction, when the elastic portion is inserted.
  5. 5. The door lock device for a vehicle according to claim 1, wherein, The lead angle of the groove strip portion of the lead screw is changed in such a manner that the movement speed of the ratchet is slower as the ratchet is moved from the neutral position of the lead screw to the releasing direction.
  6. 6. The door lock device for a vehicle according to claim 1, wherein, The lead angle of the groove strip portion of the lead screw is changed in such a manner that the movement speed of the ratchet wheel is increased as the ratchet wheel is moved from the neutral position of the lead screw to the releasing direction.
  7. 7. The door lock device for a vehicle according to claim 1, wherein, The lead angle of the groove strip portion of the lead screw is changed in such a manner that the movement speed of the ratchet wheel is increased at least from the neutral position of the lead screw toward the intermediate position.
  8. 8. The door lock device for a vehicle according to claim 1, wherein, The lead angle of the groove strip portion of the lead screw is changed in such a manner that the faster the ratchet is moved from the neutral position of the lead screw toward the intermediate position, and the slower the ratchet is moved from the intermediate position toward the release position of the ratchet.
  9. 9. The door lock device for a vehicle according to claim 1, wherein, The housing further includes an engagement cover secured to the base and covering the latch and the ratchet, A memory lever is supported on the engagement hood and moves to a blocking position capable of holding the ratchet in the release position when the ratchet moves to the release position.
  10. 10. The door lock device for a vehicle according to claim 9, wherein, When the latch is moved to the unlock position, the memory lever abuts against the latch to move from the blocking position to a non-blocking position, which is a position that allows the ratchet to rotate toward the engagement position.
  11. 11. The door lock device for a vehicle according to claim 1, wherein, The housing further comprises a motor housing secured to the base, The motor and the lead screw are supported in the motor housing.
  12. 12. The door lock device for a vehicle according to claim 11, wherein, The structure in which the latch and the ratchet are supported by the base is defined as an engagement unit, the structure in which the motor and the lead screw are supported by the motor housing is defined as a driver unit, The motor cover of the driver unit is fixed to the base body of the engagement unit, whereby the operated portion of the ratchet is engaged with the groove portion of the lead screw.
  13. 13. The door lock device for a vehicle according to claim 11, wherein, The motor cover is provided with a connector which accommodates a conductive terminal electrically connected to the motor and which sets the direction of insertion and removal of the connector to be connected to the motor as the up-down direction.
  14. 14. The door lock device for a vehicle according to claim 1, wherein, The dimension H in the up-down direction of the portion where the uppermost portion of the gear portion is located among the movable elements including the latch, the ratchet, the motor, the lead screw, and the gear portion is set to be the maximum.

Description

Door lock device for vehicle Technical Field The present invention relates to a door lock device for a vehicle, which is configured to hold a door supported by a vehicle body in a openable and closable manner in a closed state by engaging a striker. More specifically, the present invention relates to a door lock device for a vehicle that can open a door by electrically releasing an engagement state with a striker in addition to a function of holding the door in a closed state. Background As disclosed in JP4755544B, JP6427803B, JPH-61288 a, for example, a door lock device for a vehicle capable of electrically releasing an engagement state with a striker includes a base, a latch rotatably supported by the base and capable of engaging with the striker when the door is closed, a ratchet rotatably supported by the base and capable of engaging with the latch to prevent rotation of the latch in an opening direction, and an electric release mechanism (actuator mechanism) supported by the base and including a motor for outputting power for rotating the ratchet engaged with the latch in a release direction disengaging from the latch. Disclosure of Invention Problems to be solved by the invention However, in the door lock device for a vehicle disclosed in JP4755544B, an electric release mechanism is configured to include a motor, a worm wheel which is engaged with a worm provided on a rotation shaft of the motor and is rotatable in a releasing direction from a neutral position, and an opening lever which is engaged with a gear provided on the worm wheel and swings to rotate a ratchet in the releasing direction, and the rotation axis direction of the worm wheel is set to be orthogonal to the axis direction of the rotation shaft of the motor and the worm wheel is returned to a neutral position by the urging force of a return spring. Therefore, the number of components of the electric release mechanism increases to complicate the structure, and the motor and the worm wheel are disposed on the same plane, which results in an increase in the size of the device in a plan view. The door lock device for a vehicle disclosed in JP6427803B is configured to include a motor, a worm wheel which is engaged with a worm provided on a rotation shaft of the motor and is rotatable in a releasing direction from a neutral position, and an opening lever which is capable of transmitting rotation of the worm wheel to a ratchet (pawl) as a releasing operation, and is configured to return the worm wheel to a neutral position by a biasing force of a return spring while setting a rotation axis direction of the worm wheel to a direction orthogonal to an axis direction of the rotation shaft of the motor. Accordingly, similar to JP4755544B, there is a problem in that the number of components of the electric release mechanism increases to complicate the structure, and the motor and the worm wheel are disposed on the same plane, thereby increasing the size of the device in plan view. In the door lock device for a vehicle disclosed in JPH10-61288a, an electric release mechanism is configured to include a motor, a spindle rotatable about the same axis as a rotation axis of the motor, a spindle nut that is screwed to the spindle and linearly moves from a start position (neutral position) in accordance with rotation of the spindle and returns to the start position by a return spring after the motor is stopped, and an unlocking lever for transmitting the linear movement of the spindle nut as a release operation to a ratchet (locking claw) to perform the release operation of the ratchet. In addition to the worm wheel structure as in JP4755544B, JP6427803B, the structure including the spindle, the spindle nut, the return spring, and the lock release lever has a problem in that the number of components increases to complicate the structure and to increase the size of the device in plan view. In view of the above-described problems, the present invention relates to a door lock device for a vehicle, which is capable of optimizing a layout of a motor and constituent elements of the motor, simplifying a structure, and reducing the size. Solution for solving the problem According to the present invention, the above-described problems are solved as follows. The door lock device for a vehicle is characterized by comprising a housing including a base fixed to either a door or a vehicle body, a latch rotatably supported by the base by a latch shaft oriented in an up-down direction and capable of meshing with a striker provided to the other of the door or the vehicle body when the door is closed, a ratchet rotatably supported by the base by a ratchet shaft oriented in the up-down direction, the latch being held at a locking position at an engagement position with the latch, and being movable from the engagement position to a release position in which the latch is movable to an unlocking position, a motor disposed on the housing so that a rotation shaft is oriented in a