Car door isolation tool of electric train
By designing a door isolation fixture for electric trains, and utilizing a T-shaped fixture bracket and an elastic reset structure, the faulty door can be quickly isolated, solving the problem of trains being unable to run due to door failure, ensuring the safe departure of trains from the station, and reducing operational impact.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-20
AI Technical Summary
When the doors of an electric train malfunction and fail to close properly, individual isolation cannot be achieved, resulting in the inability to close the full closing circuit of the train doors and the inability of the train to operate.
Design a door isolation fixture for electric trains, including a T-shaped fixture bracket and an elastic reset structure, which can quickly isolate the faulty door when the door cannot be closed normally. The contact platform maintains contact with the limit switch contacts to ensure that the train has traction function.
It enables rapid isolation of faulty doors in the event of a door malfunction, reducing operational impact, ensuring the train can safely depart from the station, avoiding congestion along the entire operating line, and is simple to operate without affecting the driver's console status display.
Smart Images
Figure CN224020629U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of train door system control technology, and in particular to a door isolation fixture for electric trains. Background Technology
[0002] The upper structure of subway train doors typically includes components such as door controllers, door motors, door panel movement transmission devices, and limit switches. The limit switches mainly include limit switches for closing the left and right door panels and door isolation limit switches. The working principle of the limit switches is to control the circuit by determining the on / off state of the circuit through the state of their contacts.
[0003] The door closing limit switch monitors the closing status of individual doors. It is connected in series with the closing limit switches of all doors on the train to form a complete train door closing circuit, which is closed when the door is properly closed. If a single door malfunctions and cannot close properly, the entire train door closing circuit cannot be closed, and the two door closing relays on this circuit will not be energized. This will affect the closed loop of other control circuits. The most direct impact of this fault is on the train's traction circuit. Its purpose is to prevent "door-open train movement" accidents caused by doors not being closed or not properly closed, for passenger safety.
[0004] The door closing limit switch activates every time a door is opened or closed, making it prone to malfunction and requiring regular inspection. When this switch malfunctions, even if the train doors are properly closed, a fully closed circuit cannot be established, preventing the train from receiving traction. In this situation, the door isolation lock is activated, triggering the door isolation limit switch contacts to bypass the circuit containing the door closing limit switch. However, this "fully closed bypass" will cause the train to lose monitoring of the entire train's doors, necessitating a "train decommissioning" and return for repairs.
[0005] The existing door isolation trigger condition requires the doors to be closed. As the operational pressure on urban rail transit increases, the control design that was initially considered the "safest" has gradually become idealized. In actual operation, if a train is unable to run on the main line due to a door malfunction, thus affecting the operation of trains behind it, resulting in a large number of train delays and cancellations, it will have a more severe negative impact.
[0006] Therefore, a new type of door isolation fixture is needed. When a train door cannot close properly due to interference from foreign objects or other emergencies during mainline operation, staff can use the door isolation fixture to isolate the faulty door as quickly as possible after taking necessary on-site precautions, allowing the train to leave the station and preventing congestion on the entire operating line. Utility Model Content
[0007] This utility model aims to solve the problem that when the doors of an electric train cannot be closed due to some malfunction, a single train door cannot be isolated, resulting in the inability to close the full closing loop of the train doors, causing no traction and preventing the train from running.
[0008] The purpose of this utility model is to provide a door isolation fixture for electric trains, which can isolate faulty doors when the doors cannot be closed normally.
[0009] This utility model provides a door isolation fixture for an electric train, including a vertically arranged T-shaped fixture bracket. A short support arm and a long support arm are horizontally arranged on the upper sides of the top of the fixture bracket, respectively. The short support arm and the long support arm are locked on the guide rail above the door. A limit switch contact platform is provided above the center of the fixture bracket, and an elastic reset structure is provided between the contact platform and the fixture bracket.
[0010] Preferably, the elastic reset structure includes a fixed rod connected to the bottom of the contact platform, the fixed rod passing through the tooling bracket and connected downward to a limiting component, and a reset spring being sleeved on the fixed rod, the top of the reset spring abutting against the bottom of the contact platform and the bottom abutting against the tooling bracket.
[0011] Preferably, the tooling bracket has a vertical groove at its center corresponding to the fixed rod, the inner diameter of the top of the groove is larger than the outer diameter of the return spring, and the inner diameter of the bottom of the groove is larger than the diameter of the fixed rod but smaller than the inner diameter of the return spring.
[0012] Preferably, the limiting component includes a limiting nut, the lower part of the fixing rod is a threaded part, and the limiting nut is threadedly connected to the threaded part.
[0013] Preferably, the outer diameter of the threaded portion is smaller than the outer diameter of the fixing rod.
[0014] Preferably, a washer is provided between the limiting nut and the tooling bracket.
[0015] Preferably, the limiting component further includes a limiting ring, and the lower part of the threaded portion is provided with a through hole, through which the limiting ring passes.
[0016] Preferably, the width of the short support arm and the long support arm is smaller than the width of the tooling bracket.
[0017] Preferably, one side of the supporting short arm and the supporting long arm are located on the same plane as the corresponding side of the tooling bracket, and the other side of the supporting short arm and the supporting long arm are provided with an inclined surface between them and the corresponding side of the tooling bracket.
[0018] Preferably, the diameter of the contact platform is greater than 25 mm.
[0019] Beneficial effects:
[0020] This utility model uses a T-shaped tooling bracket as its main body, with supporting short arms and supporting long arms on both sides. It can be easily and quickly snapped onto the guide rail of the upper frame of the car door, providing support and fixation for the overall structure, and is compatible with various concealed door components. The contact platform above the tooling bracket, under the action of the elastic reset structure, can maintain contact with the upper limit switch contacts, quickly isolating a single door to allow the train to resume traction. Under the on-site supervision of personnel, a single door can be sealed, and the train can be driven to the nearest "turnaround station" or "terminal station" for "train clearing and disconnection," providing sufficient time for on-site troubleshooting of faulty trains and the preparation of reserve vehicles, thus reducing the impact of faults on operations.
[0021] The operation process of this utility model is simple, eliminating too many cumbersome repeated confirmation and communication operations between multiple departments, and can restore the train's traction function in the shortest processing time; at the same time, it will not affect the driver's console's display of the status of the overall doors, and the crew can continue to understand the status of other doors of the train. Attached Figure Description
[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0024] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;
[0025] Figure 3 This is a side view of the present invention, omitting the limiting ring.
[0026] Figure 4 This is a schematic diagram of the main structure of this utility model;
[0027] Figure 5 This is a top view of the structure of this utility model;
[0028] Figure 6 This is a cross-sectional structural diagram of the present invention in use.
[0029] Explanation of reference numerals in the attached figures:
[0030] 1-Tooling bracket, 2-Reset spring, 3-Contact platform, 4-Threaded part, 5-Short support arm, 6-Long support arm, 7-Fixing rod, 8-Limit nut, 9-Washer, 10-Through hole, 11-Limit ring, 12-Slide groove, 13-Guide rail, 14-Limit switch. Detailed Implementation
[0031] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] Example 1
[0035] like Figure 1-6As shown, a door isolation fixture for an electric train includes a vertically arranged T-shaped fixture bracket 1. A short support arm 5 and a long support arm 6 are horizontally positioned on either side of the top of the fixture bracket 1. The short support arm 5 and the long support arm 6 are secured to a guide rail 13 above the door. The width of the short support arm 5 and the long support arm 6 is smaller than the width of the fixture bracket 1. One side of the short support arm 5 and the long support arm 6 is on the same plane as the corresponding side of the fixture bracket 1, while the other side of the short support arm 5 and the long support arm 6 has an inclined surface between them and the corresponding side of the fixture bracket 1. The inclined side of the fixture bracket 1 faces outwards, and a marking can be placed on this side of the fixture bracket 1 for easy access by personnel. The side of the short support arm 5 and the long support arm 6 that is flush with the side of the fixture bracket 1 is close to the door panel, allowing them to fit at the angle between the door panel and the guide rail 13, increasing overall stability.
[0036] A limit switch 14 contacts the platform 3 above the center of the fixture bracket 1. When the short support arm 5 and the long support arm 6 are engaged on the guide rail 13, the contact platform 3 is located directly below the limit switch 14 of the train door isolation lock. An elastic reset structure is provided between the contact platform 3 and the fixture bracket 1. The elastic reset structure includes a fixed rod 7 connected to the bottom of the contact platform 3. The fixed rod 7 passes through the fixture bracket 1 and connects downwards to a limiting component. A reset spring 2 is sleeved on the fixed rod 7. A vertical groove 12 is provided at the center of the fixture bracket 1 corresponding to the fixed rod 7. The inner diameter of the top of the groove 12 is larger than the outer diameter of the reset spring 2; the inner diameter of the bottom of the groove 12 is larger than the diameter of the fixed rod 7 but smaller than the inner diameter of the reset spring 2. A retaining ring can be provided at the bottom of the groove 12 to make its inner diameter smaller than its top inner diameter. The lower part of the reset spring 2 is located inside the groove 12. The top of the reset spring 2 abuts against the bottom of the contact platform 3, and the bottom abuts against the retaining ring at the bottom of the groove 12 of the fixture bracket 1. The contact platform 3 rises under the action of the reset spring 2, contacts the train door isolation lock limit switch 14, and continues to move upward to trigger the limit switch 14, ultimately achieving the closure of the train door full closing control circuit.
[0037] The limiting assembly includes a limiting nut 8 and a threaded portion 4 at the lower part of the fixing rod 7, with the limiting nut 8 threadedly connected to the threaded portion 4. The outer diameter of the threaded portion 4 is smaller than the outer diameter of the fixing rod 7, and the outer diameter of the limiting nut 8 is smaller than the inner diameter of the retaining ring at the bottom of the slide groove 12. A washer 9 is provided between the limiting nut 8 and the tooling bracket 1. The washer 9 is located between the limiting nut 8 and the fixing rod 7, and can play a buffering role between the limiting nut 8 and the tooling bracket 1, and can also limit the range of motion of the fixing rod 7. By adjusting the position of the limiting nut 8 on the threaded portion 4, the upper limit of the contact platform 3 can be effectively adjusted.
[0038] The limiting assembly also includes a limiting ring 11. A through hole 10 is provided at the lower part of the threaded part 4, through which the limiting ring 11 passes. The limiting ring 11 can effectively prevent the limiting nut 8 from coming off the threaded part 4, while also making it easy for workers to pull the threaded part 4.
[0039] The contact platform 3 has a diameter greater than 25mm, preferably 27mm. The area of the contact platform 3 is much larger than the area of the door isolation lock's pop-out contact bolt, and the tension of the return spring 2 can keep the limit switch 14 contacts in contact state continuously by the contact platform 3.
[0040] Work process:
[0041] With the inclined side of the tooling bracket 1 facing the user, pull down the threaded part 4 through the limit ring 11 to lower the contact platform 3. When the contact platform 3 is lower than the plane where the short support arms 5 and the long support arms 6 are located, insert the short support arms 5 and the long support arms 6 into the guide rail 13 above the door. At this time, the contact platform 3 is located directly below the train door isolation lock limit switch 14. Then, release the threaded part 4, the return spring 2 returns to its deformation, and drives the contact platform 3 to rise and return to the normal position. During this process, the contact platform 3 first contacts the train door isolation lock limit switch 14, and then continues to move upward to trigger the limit switch 14, finally realizing the closure of the train door full closing control circuit.
[0042] When storing, pull down the limit ring 11 to make the threaded part 4 drive the contact platform 3 to descend. When the contact platform 3 descends to the plane where the short support arm 5 and the long support arm 6 are located on both sides, the contact of the isolation lock limit switch 14 is released to the free position, and the tooling can be removed by moving upwards and disengaging from the door mechanism guide rail 13.
[0043] Example 2
[0044] A door isolation fixture for an electric train has a structure basically the same as that in Embodiment 1, except that a limiting hole is horizontally provided in the middle section of the fixing rod 7, and a limiting pin can be inserted into the limiting hole. When installing the fixture bracket 1, the fixing rod 7 is pulled down until the contact platform 3 is lower than the plane where the short support arms 5 and the long support arms 6 on both sides are located. At this time, the limiting hole is exposed, and the operator inserts the limiting pin to fix the fixing rod 7 in this position, which facilitates the overall installation and disassembly of the fixture bracket 1.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A door isolation fixture for an electric train, characterized in that, The fixture includes a vertically arranged T-shaped fixture bracket. A short support arm and a long support arm are horizontally arranged on the upper sides of the top of the fixture bracket. The short support arm and the long support arm are locked on the upper guide rail of the car door. A limit switch contact platform is provided above the center of the fixture bracket. An elastic reset structure is provided between the contact platform and the fixture bracket.
2. The door isolation fixture for electric trains according to claim 1, characterized in that, The elastic reset structure includes a fixed rod connected to the bottom of the contact platform. The fixed rod passes through the tooling bracket and is connected downward to a limiting component. A reset spring is provided on the outer sleeve of the fixed rod. The top of the reset spring abuts against the bottom of the contact platform, and the bottom abuts against the tooling bracket.
3. The door isolation fixture for electric trains according to claim 2, characterized in that, The tooling bracket has a vertical groove at its center corresponding to the fixed rod. The inner diameter of the top of the groove is larger than the outer diameter of the return spring. The inner diameter of the bottom of the groove is larger than the diameter of the fixed rod but smaller than the inner diameter of the return spring.
4. The door isolation fixture for electric trains according to claim 2, characterized in that, The limiting component includes a limiting nut, and the lower part of the fixing rod is a threaded part, with the limiting nut threadedly connected to the threaded part.
5. The door isolation fixture for electric trains according to claim 4, characterized in that, The outer diameter of the threaded portion is smaller than the outer diameter of the fixed rod.
6. The door isolation fixture for electric trains according to claim 4, characterized in that, A gasket is provided between the limiting nut and the tooling bracket.
7. The door isolation fixture for electric trains according to claim 4, characterized in that, The limiting component also includes a limiting ring, and the lower part of the threaded portion is provided with a through hole, through which the limiting ring passes.
8. The door isolation fixture for electric trains according to claim 1, characterized in that, The width of the short support arm and the long support arm is smaller than the width of the tooling bracket.
9. The door isolation fixture for an electric train according to claim 8, characterized in that, The short support arm and the long support arm are located on the same plane as the corresponding side of the tooling bracket on one side, and an inclined surface is provided between the other side of the short support arm and the long support arm and the corresponding side of the tooling bracket.
10. The door isolation fixture for an electric train according to claim 1, characterized in that, The contact platform has a diameter greater than 25 mm.