CN-122003347-A - Electric brake device

Abstract

The present invention relates to an electric brake device. In the braking force maintaining mechanism (70), when the ratchet gear (71) rotates in the increasing direction (X1) in a state that the claw member (72) is engaged with the ratchet gear (71) rotating in linkage with the driving of the electric motor, the engagement of the ratchet gear (71) with the claw member (72) is released, so that the rotation of the ratchet gear (71) in the decreasing direction (X2) is allowed. In the engagement release mechanism (80), when the bolt (81) rotates in a first direction (Y1) due to an external input force, the release pawl (86) approaches and contacts the ratchet gear (71). When the bolt (81) rotates in the first direction (Y1) in this state, the ratchet gear (71) is rotated in the increasing direction (X1) by the release pawl (86).

Inventors

• OKU Hayao
• He Qikaoxing
• Ping Tiancong

Assignees

• 株式会社爱德克斯

Dates

Publication Date

20260508

Application Date

20241004

Priority Date

20231010

Claims (4)

1. 1. An electric brake device in which a rotational movement of a rotational part of a linear movement conversion mechanism is converted into a linear movement of a linear movement part of the linear movement conversion mechanism in accordance with a rotational movement of an electric motor, and a braking force is generated at a wheel of a vehicle by adjusting a force pressing a friction material against a first rotational part that rotates integrally with the wheel in accordance with the linear movement of the linear movement part, the electric brake device comprising: A braking force maintaining mechanism having a second rotating portion and an engaging portion, wherein the second rotating portion rotates in conjunction with driving of the electric motor, the engaging portion restricts rotation of the second rotating portion in a decreasing direction and allows rotation of the second rotating portion in an increasing direction when engaged with the second rotating portion, and the braking force maintaining mechanism is configured to allow rotation of the second rotating portion in the decreasing direction by releasing engagement of the engaging portion with the second rotating portion when the second rotating portion rotates in the increasing direction in a state in which the engaging portion is engaged with the second rotating portion, wherein the decreasing direction is a rotating direction of the second rotating portion when the braking force is decreased, and And an engagement releasing mechanism having a third rotating portion that rotates when a force is inputted from the outside, and an acting portion that approaches and contacts the second rotating portion when the third rotating portion rotates in a first direction, and that moves away from the second rotating portion when the third rotating portion rotates in a second direction that is a direction opposite to the first direction, wherein the engagement releasing mechanism is configured to increase the force inputted from the outside when the third rotating portion rotates in the first direction in a state in which the acting portion contacts the second rotating portion, and rotate the second rotating portion in the increasing direction by the acting portion.
2. 2. An electric brake apparatus according to claim 1, wherein, The second rotating portion is a gear having a plurality of teeth arranged in a circumferential direction, The operating portion is provided with a claw portion configured to be engageable with one of the plurality of teeth of the gear, The operating portion is configured to avoid contact with a tooth adjacent to the one of the plurality of teeth in the decreasing direction when the claw portion is engaged with the one of the teeth.
3. 3. An electric brake apparatus according to claim 1, wherein, Comprises a base member to which the braking force maintaining mechanism is attached, The engagement releasing mechanism is attached to the base member.
4. 4. An electric brake device according to any one of claims 1 to 3, wherein, The engagement releasing mechanism is provided with a restricting portion that restricts rotation of the third rotating portion in the first direction due to vibration acting on the engagement releasing mechanism.

Description

Electric brake device Technical Field The present invention relates to an electric brake device provided in a vehicle. Background Patent document 1 discloses an electric brake device provided with a parking brake mechanism. The parking brake mechanism includes a rotating body that rotates in conjunction with an electric motor that is a power source of the electric brake device, and an engagement portion that is movable forward and backward in a direction toward and away from the rotating body. The rotation direction of the rotating body in the case of an increase in braking force is defined as an "increase direction", and the rotation direction of the rotating body in the case of a decrease in braking force is defined as a "decrease direction". At this time, the parking brake mechanism restricts rotation of the rotating body in the reducing direction by engaging the engaging portion with the rotating body. Thereby, the state in which the braking force is generated is maintained. On the other hand, when the rotating body rotates in the increasing direction in a state where the engaging portion is engaged with the rotating body, the engagement of the engaging portion with the rotating body is eliminated, and the engaging portion is separated from the rotating body. This can release the state of generating the braking force. However, when the engagement portion is engaged with the rotating body, an abnormality may occur, and the electric motor may not be driven. In this case, the state in which the braking force is generated cannot be released because the rotating body cannot be rotated. The caliper of the electric brake device of patent document 1 is provided with an insertion hole for inserting a dedicated tool into the device. When the tool is inserted into the device from the insertion hole, the front end of the tool contacts the rotating body. In a state where the tip is in contact with the rotating body in this way, the operator can rotate the rotating body in the increasing direction by pressing the tool into the depth of the device. When the rotating body is rotated in the increasing direction by the tool in this way, the engagement of the engaging portion with the rotating body is eliminated. As a result, the engaging portion is separated from the rotating body. Therefore, even if the electric motor cannot be driven, the state of generating the braking force can be eliminated. Patent document 1 Japanese patent laid-open publication No. 2010-58788 In the case where the tool that has been in contact with the rotating body is pushed into the deep of the device as described above to forcibly rotate the rotating body, the operator needs to push the tool into the deep of the device with a very strong force. Disclosure of Invention An electric brake device for solving the above-described problems is configured to rotate a rotary unit of a linear motion conversion mechanism in response to a rotational motion of an electric motor, convert the rotational motion of the rotary unit into a linear motion of a linear motion unit of the linear motion conversion mechanism, and generate a braking force on a wheel of a vehicle by adjusting a force pressing a friction material against a first rotary unit that rotates integrally with the wheel in response to the linear motion of the linear motion unit. The electric brake device includes a braking force maintaining mechanism having a second rotating portion and an engaging portion, wherein the second rotating portion rotates in conjunction with driving of the electric motor, the engaging portion restricts rotation of the second rotating portion in a decreasing direction and allows rotation of the second rotating portion in an increasing direction when engaged with the second rotating portion, and the braking force maintaining mechanism is configured to release engagement between the engaging portion and the second rotating portion in the increasing direction when the engaging portion is engaged with the second rotating portion, thereby allowing rotation of the second rotating portion in the decreasing direction, wherein the increasing direction is a rotation direction of the second rotating portion when the braking force is increased, and a releasing mechanism having a third rotating portion and an operating portion, wherein the engaging portion releases engagement between the engaging portion and the second rotating portion when the third rotating portion is engaged with the second rotating portion, and releases the second rotating portion from contact with the third rotating portion when the third rotating portion is moved in the decreasing direction, and the second rotating portion is moved in the decreasing direction when the braking force is increased from the second rotating portion is applied to the second rotating portion, the second rotating portion is rotated in the increasing direction by the acting portion. The electric brake device has the effect that when a f