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CN-115593372-B - Parking brake mechanism and working method thereof

CN115593372BCN 115593372 BCN115593372 BCN 115593372BCN-115593372-B

Abstract

The invention discloses a parking brake mechanism and a working method thereof, wherein the parking brake mechanism comprises a pedal assembly, a pedal support, a first elastic piece, a second elastic piece, a rotating shaft and a frame support, the pedal assembly is rotationally connected with the pedal support, the first elastic piece is connected with the pedal assembly and the pedal support and provides a first rotation direction pretightening force for the pedal assembly, the pedal assembly comprises a first limiting piece, the first limiting piece enables the pedal assembly to be unable to rotate in the first rotation direction in an initial state, the pedal support is rotationally connected with the frame support through the rotating shaft, the second elastic piece is connected with the pedal support and the frame support and provides a third rotation direction pretightening force for the brake pedal support, the pedal assembly comprises pedals and parking limiting plates positioned on opposite sides of the pedals, and grooves are formed in the parking limiting plates. The invention is safe and convenient to operate, a user can finish braking or parking by one foot, and the parking condition can not be generated when the braking operation is performed, and the parking can be performed only by special action, so that the user experience is improved.

Inventors

  • WANG JIANHUI
  • LIU KAI
  • PEI YONG
  • YUAN GUOHUI

Assignees

  • 江苏苏美达五金工具有限公司

Dates

Publication Date
20260512
Application Date
20220922

Claims (11)

  1. 1. The utility model provides a stop mechanism, includes pedal subassembly, pedal subassembly swing joint is in the frame support, frame support fixed connection is on the frame, pedal subassembly passes through the connecting piece and connects stop subassembly, stop subassembly can restrict power unit motion, its characterized in that: The pedal assembly is rotatable along a first rotation axis (201 a) and a second rotation axis (205); The pedal assembly can control the opening and closing of the stopping assembly and/or the limitation degree of the power unit when rotating along the second rotating shaft (205); also comprises a pedal bracket (202), a first elastic piece (203) and a second elastic piece (204), The pedal assembly (201) is rotationally connected with the pedal bracket (202), the first elastic piece (203) is connected with the pedal assembly (201) and the pedal bracket (202) and provides a first rotation direction pretightening force for the pedal assembly (201), the pedal assembly (201) comprises a first limiting piece (201 b), the first limiting piece (201 b) enables the pedal assembly (201) to be unable to rotate in the first rotation direction in an initial state, The pedal bracket (202) is rotationally connected with the frame bracket (101) through the second rotating shaft (205), the second elastic piece (204) is connected with the pedal bracket (202) and the frame bracket (101) and provides a third rotation direction pretightening force for the brake pedal bracket (202), The pedal assembly (201) comprises a pedal (201 c) and a parking limiting plate (201 d) positioned on the opposite side of the pedal (201 c), the parking limiting plate (201 d) is provided with a groove, when the pedal (201 c) is stepped on, the pedal assembly (201) and the pedal bracket (202) can rotate in a fourth rotation direction from an initial position, meanwhile, a first rotation torque is applied to the pedal assembly (201), the pedal assembly (201) is still kept at the initial position under the action of a first limiting piece (201 b), when the pedal (201 c) is released, the pedal assembly (201) and the pedal bracket (202) can return to the initial position under the action of a second elastic piece (204), when the pedal assembly (201) is stepped on, the torque is larger than the sum of the acting force of the first elastic piece (203) and the torque of the pedal (201 c), the pedal assembly (201) can rotate in the opposite rotation direction relative to the pedal bracket (202), and the pedal assembly (201) can rotate in the opposite rotation direction to the first rotation direction to the pedal bracket (201 c), and the pedal bracket (201) can rotate in the opposite rotation direction to the first rotation direction to the third rotation direction.
  2. 2. The parking brake mechanism of claim 1, wherein the pedal assembly is movable along the second axis of rotation (205) between a first position and a second position, the stop assembly being operable to limit movement of the power unit when the pedal is in the second position, the pedal assembly being operable to rotate along the first axis of rotation (201 a) to a limit position, the pedal assembly being operable to rotate along the second axis of rotation (205) from the second position in a direction toward the first position when the pedal assembly is in the limit position.
  3. 3. The parking brake mechanism according to claim 1, wherein the first rotation shaft (201 a) is located at a lower portion of the pedal assembly (201), the pedal bracket (202) upper portion includes a first pedal bracket hole (202 a), and the first rotation shaft (201 a) is disposed through the first pedal bracket hole (202 a).
  4. 4. A parking brake mechanism according to claim 3, wherein the first rotation shaft (201 a) is provided through the first elastic member (203), the first stopper (201 b) is located at a lower portion of the first rotation shaft (201 a), and an end portion of the first stopper (201 b) abuts against a side surface of the pedal bracket (202).
  5. 5. The parking brake mechanism according to claim 1, wherein a second pedal bracket hole (202 b) is formed in the pedal bracket (202) at a lower portion of the first pedal bracket hole (202 a), a frame bracket hole (101 a) is formed in the frame bracket (101), and the second rotary shaft (205) is disposed through the frame bracket hole (101 a) and the second pedal bracket hole (202 b).
  6. 6. The parking brake mechanism according to claim 1, wherein the frame bracket (101) is provided with a second limiting member (101 b), and the second limiting member (101 b) is used for limiting the rotation angle of the fourth rotation direction of the pedal assembly (201) and pedal bracket (202) combination.
  7. 7. The parking brake mechanism according to claim 1, characterized in that the second rotating shaft (205) is limited by a pin to prevent disengagement, and a plastic bushing is arranged on the second rotating shaft (205).
  8. 8. The parking brake mechanism of claim 1, wherein the pedal assembly (201) further comprises a parking pedal (201 e) located on an opposite side of the pedal (201 c) and on an upper portion of the parking limiter plate (201 d).
  9. 9. A method of operating a parking brake mechanism according to any one of claims 1 to 7, the method comprising a braking mode and a parking mode, In an initial state, the pedal assembly (201) and pedal bracket (202) are in an initial position under the action of the second elastic piece (204) and have a third rotation direction movement trend, and the pedal assembly (201) is in an initial position relative to the pedal bracket (202) under the action of the first elastic piece (203) and the first limiting piece (201 b) and has a first rotation direction movement trend; The brake mode is that when a user steps on a pedal (201 c) of the pedal assembly (201), the pedal assembly (201) and the pedal bracket (202) rotate in a fourth rotation direction, the maximum rotation angle is limited by the second limiting piece (101 b), at the moment, the user applies a first rotation torque to the pedal assembly (201), and the pedal assembly (201) still keeps at an initial position relative to the pedal bracket (202) under the action of the first limiting piece (201 b); When the user releases the pedal assembly (201), the pedal assembly (201) and pedal bracket (202) combination returns to the initial position under the action of the second elastic piece (204); The parking mode is that when a user steps on a pedal (201 c) of the pedal assembly (201), the pedal assembly (201) and the pedal bracket (202) rotate in a fourth rotation direction, and the maximum rotation angle is limited by the second limiting piece (101 b), at the moment, the user applies a first rotation torque to the pedal assembly (201), and the pedal assembly (201) still keeps at an initial position relative to the pedal bracket (202) under the action of the first limiting piece (201 b); The user applies a force F to the pedal assembly (201), namely, applies a torque with a second rotation direction to the pedal assembly (201), and when the torque with the second rotation direction is larger than the sum of the acting force of the first elastic piece (203) and the torque for stepping on the pedal (201 c), the pedal assembly (201) rotates in the second rotation direction relative to the pedal bracket (202); Then the user releases the pedal (201 c), but keeps exerting force F, the pedal assembly (201) and pedal bracket (202) combination rotates according to the third rotation direction under the action of the second elastic piece (204), the groove part of the parking limiting plate (201 d) on the pedal assembly (201) is clamped into the protruding part of the frame bracket (101); the user releases pedal subassembly (201) completely, and under the spacing effect of parking limiting plate (201 d), pedal subassembly (201) can't rotate according to first direction of rotation, and similarly, pedal subassembly (201) and pedal support (202) assembly can't rotate according to third direction of rotation under the spacing effect of parking limiting plate (201 d), realizes the parking.
  10. 10. A lawnmower comprising the parking brake mechanism of any one of claims 1-8.
  11. 11. The mower of claim 10 wherein the mower is a riding mower.

Description

Parking brake mechanism and working method thereof Technical Field The invention belongs to the technical field of vehicle parking brake, and particularly relates to a parking brake mechanism and a working method thereof. Background In the existing parking brake mechanism in the market, a user needs to cooperatively operate hands and feet or feet when performing parking operation, so that the parking brake mechanism is inconvenient to use, and the user can park the vehicle when not paying attention to the parking brake mechanism when performing the braking operation, so that the user can feel trouble in use. Disclosure of Invention The invention provides a parking brake mechanism which is safe and convenient to operate and a working method thereof. The technical solution for achieving the above purpose is as follows: the parking brake mechanism comprises a pedal assembly movably connected with a frame bracket fixedly connected with a frame, the pedal assembly is connected with a stop assembly through a connecting piece, the stop assembly can limit the movement of a power unit, The pedal assembly can rotate along a first rotation shaft and/or a second rotation shaft; the pedal assembly can control the opening and closing of the stopping assembly and/or the limitation degree of the power unit when rotating along the second rotating shaft. Further, the pedal assembly can move between a first position and a second position along the second rotation axis, the stop assembly can limit the movement of the power unit when the pedal is positioned at the second position, the pedal assembly can rotate to a limit position along the first rotation axis when the pedal assembly is positioned at the second position, and the pedal assembly cannot rotate from the second position to the first position along the second rotation axis when the pedal assembly is positioned at the limit position. Further comprises a pedal bracket, a first elastic piece and a second elastic piece, The pedal assembly is rotationally connected with the pedal bracket, the first elastic piece is connected with the pedal assembly and the pedal bracket and provides a pretightening force for the pedal assembly in a first rotation direction, the pedal assembly comprises a first limiting piece, the first limiting piece enables the pedal assembly to be unable to rotate in the first rotation direction in an initial state, The pedal bracket is rotationally connected with the frame bracket through the second rotating shaft, the second elastic piece is connected with the pedal bracket and the frame bracket and provides a third rotation direction pretightening force for the brake pedal bracket, The pedal assembly comprises a pedal and a parking limiting plate positioned on the opposite side of the pedal, the parking limiting plate is provided with a groove, when the pedal is stepped on, the pedal assembly and the pedal support assembly can rotate in a fourth rotation direction from an initial position, meanwhile, a first rotation torque can be applied to the pedal assembly, the pedal assembly still remains at the initial position under the action of the first limiting piece, when the pedal is released, the pedal assembly and the pedal support assembly can return to the initial position under the action of the second elastic piece, when the pedal is stepped on, a second rotation torque is applied to the pedal assembly, when the torque is larger than the sum of the acting force of the first elastic piece and the torque of the pedal, the pedal assembly can rotate in the second rotation direction relative to the pedal support, after the pedal is released, the pedal assembly and the pedal support assembly can rotate in a third rotation direction under the action of the second elastic piece, so that the groove part of the limiting plate is clamped into the frame support, and the third rotation direction is opposite to the fourth rotation direction. Further, the first rotation shaft is located at a lower portion of the pedal assembly, the pedal bracket upper portion includes a first pedal bracket hole, and the first rotation shaft is disposed through the first pedal bracket hole. Further, the first rotating shaft passes through the first elastic piece, the first limiting piece is positioned at the lower part of the first rotating shaft, and the end part of the first limiting piece is propped against one side surface of the pedal bracket. Further, a second pedal support hole is formed in the lower portion of the pedal support, located in the first pedal support hole, of the pedal support, a frame support hole is formed in the frame support, and the second rotating shaft penetrates through the frame support hole and the second pedal support hole. Further, a second limiting piece is arranged on the frame support and used for limiting the rotation angle of the fourth rotation direction of the pedal assembly and pedal support assembly. Further, the second rotating shaft is li