A brake and unlock integrated motor for a rail vehicle door

Abstract

The utility model discloses a kind of brake unlocking integration motor for rail vehicle door, including fuselage, the main shaft of through fuselage, still including coaxial sleeve being equipped in the damping disc assembly of main shaft output end, brake torsional spring, unlocking wheel and the operating mechanism of driving unlocking wheel rotation;Damping disc assembly is fixedly connected with fuselage and has rotary friction pair;Brake torsional spring two ends are connected damping disc assembly and unlocking wheel respectively, inner diameter is greater than the diameter of main shaft and has no contact with main shaft under normal state;Through the fixed connection of damping disc assembly and fuselage and its rotary friction pair design, combined with brake torsional spring two ends respectively connecting damping disc assembly and the linkage structure of unlocking wheel, form the mechanical transmission chain of self-locking and emergency unlocking, realize pure mechanical type brake and unlocking integration function, significantly improve the safety protection level of vehicle door system under emergency working condition, while reducing the equipment volume simplifies equipment structure.

Description

Technical Field

[0001] This utility model relates to electric motors, and more particularly to an integrated motor for braking and unlocking rail vehicle doors. Background Technology

[0002] As a critical safety device for passenger access, the door system of rail vehicles requires its drive motor to simultaneously meet the triple functional requirements of power output, position locking, and emergency unlocking. Existing technologies employ a split-type design: the basic drive motor operates independently, door positioning is achieved through an external electromagnetic brake, and a separate mechanical unlocking device handles power outages. This split architecture results in a large footprint, complex structure, and lag in response. In systems requiring large-opening doors, the limited space within the vehicle limits the size of the drive mechanism, creating a physical conflict between interior space requirements and equipment space. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide an integrated braking and unlocking motor for rail vehicle doors that has a simple structure and integrates braking and unlocking functions.

[0004] Technical solution: The present invention relates to an integrated braking and unlocking motor for rail vehicle doors, comprising a body, a main shaft penetrating the body, and a damping disc assembly, a brake torsion spring, an unlocking wheel, and an operating mechanism for driving the unlocking wheel to rotate, all coaxially sleeved at the output end of the main shaft. The damping disc assembly is fixedly connected to the body and has a rotational friction pair. The brake torsion spring is connected at both ends to the damping disc assembly and the unlocking wheel, respectively, and under normal conditions, its inner diameter is larger than the diameter of the main shaft and it does not contact the main shaft.

[0005] Preferably, the damping disc assembly includes a fixed base and a damping disc; the fixed base is fixed to the machine body, and the damping disc is sleeved on the main shaft and installed on the fixed base through clearance fit, forming a rotary friction pair between the two.

[0006] Preferably, it also includes a reset torsion spring sleeved on the output end of the main shaft for driving the unlocking wheel to reset after the operation is completed, wherein the two ends of the reset torsion spring are respectively fixed on the fixed base and the unlocking wheel.

[0007] Preferably, the operating mechanism includes a flexible traction member, the end of which is fixed to the radial sidewall of the unlocking wheel.

[0008] Preferably, the flexible traction component is a steel wire rope, and the outer edge of the unlocking wheel is provided with an annular groove to accommodate the steel wire rope.

[0009] Preferably, the clearance fit area between the damping disc and the fixed base is provided with a wear-resistant coating to reduce wear caused by long-term friction and extend service life.

[0010] Preferably, the braking torsion spring is a rectangular cross-section helical spring.

[0011] Preferably, the torque of the reset torsion spring is less than the contraction torque of the brake torsion spring.

[0012] Beneficial effects: Compared with the prior art, this utility model has the following advantages: By fixing the damping disc assembly to the body and designing its rotational friction pair, combined with the linkage structure that connects the damping disc assembly and the unlocking wheel at both ends of the brake torsion spring, a mechanical transmission chain for self-locking and emergency unlocking is formed, realizing the integrated function of pure mechanical braking and unlocking, significantly improving the safety protection level of the vehicle door system in emergency conditions, while reducing the size of the equipment and simplifying the equipment structure. Attached Figure Description

[0013] Fig. 1 This is an exploded view of the internal structure of this utility model.

[0014] Fig. 2 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0016] like Figs. 1-2 As shown, an integrated braking and unlocking motor for a rail vehicle door includes a body 1 and a main shaft 8 penetrating the body. A damping disc assembly is coaxially mounted on the output end of the main shaft 8. This assembly consists of a fixed base 3 and a damping disc 2. The fixed base 3 is bolted to the end face of the body 1, and the damping disc 2 is installed within the fixed base 3 with a clearance fit. The mating surfaces of the two are coated with a wear-resistant coating, forming a rotating friction pair. The rigid connection between the fixed base 3 and the body 1 provides a stable support foundation, while the clearance fit allows the damping disc 2 to rotate slightly. The friction pair can dissipate braking impact energy, such as the door's gravitational inertia, preventing mechanism vibration. The wear-resistant coating reduces wear caused by long-term friction, extending service life. The braking torsion spring 6 is a rectangular cross-section helical spring, sleeved on the main shaft 8. One end is fixedly connected to the outer edge of the damping disc 2, and the other end is fixedly connected to the side wall of the unlocking wheel 7. Under normal conditions, the inner diameter of the braking torsion spring 6 is larger than the diameter of the main shaft 8 to maintain a clearance. The rectangular cross-section provides uniform radial clamping force; the normal clearance ensures no frictional loss during normal motor operation. The outer edge of the unlocking wheel 7 has an annular groove, and the steel wire rope of the operating mechanism 4 is wound and fixed in the groove. The reset torsion spring 5 is sleeved on the output end of the main shaft 8, and its two ends are fixed to the fixed seat 3 and the unlocking wheel 7 respectively. The torque value of the reset torsion spring 5 is less than the contraction torque of the brake torsion spring 6. The torque difference ensures that the unlocking wheel 7 automatically resets after the steel wire rope is released, so that the brake torsion spring 6 returns to its free state and avoids overload damage to the mechanism during the reset process.

[0017] The working principle of the entire device is as follows: Under normal driving conditions, the main shaft 8 rotates under the drive of the machine body 1. The brake torsion spring 6, due to its larger inner diameter than the main shaft diameter in its free state, does not contact the main shaft 8; the damping disc 2 remains stationary due to the constraint of the friction pair. When the motor is de-energized and braking is required, pulling the steel cable of the operating mechanism 4 triggers the brake, causing the unlocking wheel 7 to rotate. The rotation of the unlocking wheel 7 causes the brake torsion spring 6 to contract. The contraction force of the brake torsion spring 6 is transmitted to the damping disc 2, which overcomes the resistance of the friction pair and rotates slightly, consuming impact energy through the friction pair. The brake torsion spring 6 radially contracts and grips the main shaft 8, achieving a purely mechanical self-locking mechanism. In emergency unlocking, the operator pulls the steel cable to continue driving the unlocking wheel 7 to rotate. The unlocking wheel 7, through the already gripped brake torsion spring 6, causes the main shaft 8 to reverse direction, and the door system moves in the opposite direction to unlock. At this time, the damping disc 2, the brake torsion spring 6, and the unlocking wheel 7 form a rigid linkage. When it is necessary to restore to normal working condition, loosen the wire rope, stop rotating the unlocking wheel 7, release the torque of the reset torsion spring 5 to drive the unlocking wheel 7 to rotate in the opposite direction to the initial position, expand the brake torsion spring 6, restore the inner diameter to be greater than the main shaft diameter, release the clamping state, and restore the motor drive function to normal.

[0018] This device integrates drive, braking, and manual unlocking functions, thereby reducing the space occupied by the equipment; it also reduces the number of parts required to achieve the desired functions, making installation and maintenance easier and reducing related costs.

Claims

1. An integrated braking and unlocking motor for rail vehicle doors, comprising a body (1) and a main shaft (8) penetrating the body (1), characterized in that: It also includes a damping disc assembly, a brake torsion spring (6), an unlocking wheel (7), and an operating mechanism (4) that drives the unlocking wheel (7) to rotate, all coaxially sleeved on the output end of the main shaft (8); the damping disc assembly is fixedly connected to the body (1) and has a rotating friction pair; the brake torsion spring (6) is connected to the damping disc assembly and the unlocking wheel (7) at both ends respectively, and its inner diameter is larger than the diameter of the main shaft (8) and does not contact the main shaft (8) under normal conditions.

2. The motor according to claim 1, characterized in that: The damping disk assembly includes a fixed seat (3) and a damping disk (2); the fixed seat (3) is fixed to the machine body (1), and the damping disk (2) is sleeved on the main shaft (8) and installed on the fixed seat (3) through clearance fit, and the two form a rotating friction pair.

3. The motor according to claim 2, characterized in that: It also includes a reset torsion spring (5) sleeved on the output end of the main shaft (8) for driving the unlocking wheel (7) to reset after the operation is completed. The two ends of the reset torsion spring (5) are fixed on the fixed seat (3) and the unlocking wheel (7) respectively.

4. The motor according to claim 1, characterized in that: The operating mechanism (4) includes a flexible traction member whose end is fixed to the radial sidewall of the unlocking wheel (7).

5. The motor according to claim 4, characterized in that: The flexible traction component is a steel wire rope, and the outer edge of the unlocking wheel (7) is provided with an annular groove to accommodate the steel wire rope.

6. The motor according to claim 2, characterized in that: The gap fit area between the damping disc (2) and the fixed seat (3) is provided with a wear-resistant coating.

7. The motor according to claim 1, characterized in that: The braking torsion spring (6) is a rectangular cross-section helical spring.

8. The motor according to claim 3, characterized in that: The torque of the reset torsion spring (5) is less than the contraction torque of the brake torsion spring (6).

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