CN109025585B

CN109025585B - Safety device for bus passenger door

Info

Publication number: CN109025585B
Application number: CN201810956036.5A
Authority: CN
Inventors: 姚进; 刘慧兰; 冉天月
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2018-08-21
Filing date: 2018-08-21
Publication date: 2020-01-10
Anticipated expiration: 2038-08-21
Also published as: CN109025585A

Abstract

A bus passenger door safety device comprising: pivot, crank, long key, extension spring, box, long baffle, drive baffle, motor, answer spring, bolt and shell, characterized by: the crank and the rotating shaft are fixed together through a long key, the box body is in threaded connection with the rotating shaft, the long key tightly presses the long baffle under the action of the tension spring, one end of the long baffle is extruded by the return spring, the other end of the long baffle is fixed through the driving baffle, and the driving baffle is controlled by the motor. The invention has simple structure, easy realization, reliable realization of the separation of the crank and the rotating shaft, thereby realizing the separation of the cylinder and the rotating shaft and having very high practical value.

Description

Safety device for bus passenger door

Technical Field

The invention belongs to the field of general vehicle doors, and particularly relates to a safety device of a bus door.

Background

According to statistics, 85% of citizens in China select buses as the primary travel tool, and in the face of such large carrying capacity, bus emergency protection measures are very important and are worthy of careful study.

The emergency protection measures commonly adopted by domestic buses are as follows: safety hammer, automatic blasting ware, fire extinguisher, atomizer and door pump stop valve. The escape modes are analyzed, and door escape is the preferred mode in consideration of escape efficiency and avoidance of secondary damage. The door is fleed and is needed to press a pump stop valve to unload the atmospheric pressure in the cylinder to realize the manual door opening, but it has two big defects: firstly, if a bus circuit fails, a stop valve of a door pump cannot work normally, air pressure in an air cylinder cannot be discharged, and a door cannot be opened; secondly, if the air is not discharged in time, the time is long, and once the crowd extrudes outwards, the passenger door cannot be opened when the crowd is blocked at the passenger door. From the above, the best way is to rapidly open the bus passenger door using a separate system.

CN201110411213.X discloses a bus hand-pull type emergency door opening device, which can change a rotating shaft from a fixed connection into a hinged mechanism, and a passenger pulls an emergency handle and then utilizes a shifting fork clutch to change the rotating shaft into an upper section and a lower section which are hinged. The problems with this structure are: the passenger is required to manually open the door, the passenger has the possibility of not timely reflecting the emergency, and the clutch is directly disengaged by the direct exertion of force of the passenger, so that the required force is large, and the door is not suitable for being operated by children and old people.

CN201420557447.4 discloses a device for opening the passenger door of a bus outward, the original threaded connection at the connecting rod of the sliding chute of the bus is changed into a pin capable of being quickly disengaged, when the door opening signal is executed, the pin is quickly and inwardly withdrawn by the mechanical part, so that the guide rail of the bus is separated from the door plate, and the outward opening of the door by the rotating shaft is realized. The problems with this structure are: this patent does not solve because straight arm links firmly with the pivot, when breaking away, and the pivot is fixed not rotate and leads to straight arm rigid, and the problem that the passenger door can not outwards open completely at last.

Disclosure of Invention

The invention aims to provide a mechanism which is independent of the original system of a bus and can ensure that a rotating shaft and a crank of the bus are fixedly connected and become articulated aiming at the defects of the prior art. When the mechanism is used independently, the connection between the quick-release cylinder and the rotating shaft is realized through the release of the connection between the crank and the rotating shaft, and people closest to the passenger door can open the passenger door before crowds crowd the passenger door; when the mechanism is used together with a mechanism which can loosen the car guide rail and the door plate, the complete outward opening of the bus door under emergency can be realized.

The technical scheme adopted by the invention for solving the technical problems is as follows: including pivot, crank, long key, extension spring, box, drive baffle, motor, bolt, long baffle, answer spring and shell, characterized by: the rotating shaft is divided into two parts, the lower part of the rotating shaft is fixedly connected with a straight arm, the upper part of the rotating shaft is a cylinder provided with a key slot, and the middle of the rotating shaft is provided with a threaded hole. The crank is divided into two parts, one side is connected with the cylinder, and the other side is provided with a circular ring with a key groove. The end face of the long key is square, and the side face of the long key is provided with a hanging lug. The box body is divided into an upper part, a middle part and a lower part, the box body is E-shaped when viewed from the side, the lower part of the box body is provided with a key hole and a through hole, the upper part of the box body is a cylinder, the middle part of the box body is provided with a vertical sliding chute and a horizontal sliding chute, the section of the horizontal sliding chute is cross-shaped, and the horizontal sliding chute does not penetrate through the middle part in the horizontal direction. The driving baffle consists of two surfaces, wherein one surface of the driving baffle is provided with a threaded hole, and the other surface of the driving baffle is L-shaped. The connecting mode is that the circular ring part of the crank is connected with the upper part of the rotating shaft through a long key, and the box body is fixed with the rotating shaft through a bolt. The extension spring is tensile state, and one end is connected on the long key, and one end is connected on the box, and the long key sticiss long baffle under the effect of extension spring. The return spring is in a compressed state, the number of the return springs is at least 1, one end of each return spring is tightly pressed on the box body, one end of each return spring is tightly pressed on the long baffle, and the long baffle is kept static under the blocking of the driving baffle under the pressure of the return spring. The motor is fixed on the upper part in the box body, and the driving baffle is driven by the motor. The casing is covered on the box body.

When an emergency occurs, the motor works to drive the baffle plate to slide upwards along the vertical sliding groove, the long baffle plate moves under the action of the return spring and does not block the long key, the long key moves upwards under the action of the tension spring, the crank is separated from the rotating shaft, and the rotating shaft is disconnected from the cylinder.

The invention has the following beneficial effects:

1. the invention has simple structure and good installation, and can reform the buses which are put into use without changing the bus door, so that the buses are safer; and can also be installed and used on newly produced buses.

2. The invention does not affect the use of the bus under normal conditions, and the opening and closing of the bus are controlled by the original system; under emergency, motor drive "L" baffle no longer blocks long baffle for long baffle no longer blocks long key under the effect of answer spring, and cylinder and pivot become articulated. When the mechanism is used together with a mechanism which can loosen the car guide rail and the door plate, the complete outward opening of the bus door under emergency can be realized; when the bus door is used independently, the bus door can be opened quickly, the situation that the door cannot be opened due to circuit problems in the emergency situation of the bus door is avoided, and the practical value and the application value are very high.

3. The invention has simple transmission chain, can quickly respond in case of emergency, and loosens the connection between the crank and the rotating shaft before passengers are crowded at the doorway so as to separate the cylinder and the rotating shaft.

Drawings

Fig. 1 is a schematic diagram of a mechanical function implementation structure.

Fig. 2 is a partial structural sectional view of the chute of the device.

Fig. 3 is a schematic view of the overall structure.

Fig. 4 is a schematic view of the structure of the rotating shaft.

Fig. 5 is a schematic structural diagram of the box body.

FIG. 6 is a schematic view of a long key structure.

Fig. 7 is a schematic view of a driving baffle structure.

Wherein: 1. the device comprises a rotating shaft, 2, a crank, 3, a long key, 4, a tension spring, 5, a box body, 6, a driving baffle, 7, a motor, 8, a bolt, 9, a long baffle, 10, a return spring, 11 and a shell.

Detailed description of the preferred embodiments

The structure and operation of a bus passenger door safety device according to the present invention will be further described by way of embodiments with reference to the accompanying drawings.

In this embodiment, the structure of the mechanism for making the cylinder 2 and the rotating shaft 1 of the bus become articulated from fixed connection is shown in fig. 1, 2 and 3, and mainly comprises: the device comprises a rotating shaft 1, a crank 2, a long key 3, a tension spring 4, a box body 5, a driving baffle 6, a motor 7, a bolt 8, a long baffle 9, a return spring 10 and a shell 11.

The structure of the rotating shaft 1 is as shown in fig. 4, and is divided into an upper part and a lower part, wherein the lower part is fixedly connected with a straight arm, the upper part is a cylinder provided with a key slot, and the middle part is provided with a threaded hole. The crank 2 is divided into a left part and a right part as shown in figure 1, wherein the left part is connected with the cylinder, and the right part is a circular ring provided with a key slot. The structure of the long key 3 is shown in figure 6, the end face is square, and the side face is provided with a hanging lug. The structure of the box body 5 is as shown in fig. 5, which is divided into an upper part, a middle part and a lower part, the box body is in an E shape when seen from the side surface, the lower part is provided with a key hole and a through hole, the upper part is a cylinder, the concrete structure of the middle part is shown in fig. 2, the box body is provided with a vertical sliding chute and a horizontal sliding chute, the section of the horizontal sliding chute is in a cross shape, and the horizontal sliding chute does not penetrate through the middle part in the horizontal. The driving baffle structure is shown in figure 7 and comprises two surfaces, wherein one surface of the driving baffle structure is provided with a threaded hole, and the other surface of the driving baffle structure is L-shaped. The device assembly method is as follows: as shown in FIG. 1, a ring portion with a key groove of a crank 2 is connected with an upper portion of a rotating shaft 1 by a long key 3, and a case 5 and the rotating shaft 1 are fixed by a bolt 8. The extension spring 4 is tensile state, and one end is connected on long key 3, and one end is connected on box 5, and long key 3 sticiss long baffle 6 under the effect of extension spring. The return spring 10 is in a compressed state, one end of the return spring is tightly pressed on the box body 5, the other end of the return spring is tightly pressed on the long baffle 9, and the long baffle 9 is kept static under the action of the driving baffle under the pressure of the return spring 10. The motor 7 is fixed on the upper part of the box body 5, and the driving baffle 6 is driven by the motor 7. The housing 11 is covered on the case 5.

When the crank 2 of the bus needs to be loosened from the rotating shaft 1 in an emergency, the motor 7 enables the driving baffle 6 to move upwards along the vertical sliding groove, so that the long baffle 9 moves leftwards under the action of the return spring 10 and does not block the long key 3, the long key 3 moves upwards under the action of the tension spring 4, finally, the circular ring part of the crank 2 is disconnected from the rotating shaft 1 and becomes hinged, the air cylinder is also disconnected from the rotating shaft 1, and the passenger door can rotate around the shaft.

Claims

1. A bus passenger door safety device, its characterized in that: the device is characterized by comprising a rotating shaft (1), a crank (2), a long key (3), a tension spring (4), a box body (5), a driving baffle (6), a motor (7), a bolt (8), a long baffle (9), a return spring (10) and a shell (11), wherein the rotating shaft (1) is divided into two parts, the lower part of the rotating shaft is fixedly connected with a straight arm, the upper part of the rotating shaft is a cylinder provided with a key slot, and a threaded hole is formed in the middle of the rotating shaft; the crank (2) is divided into two parts, one side is connected with the cylinder, and the other side is a circular ring provided with a key slot; the end face of the long key (3) is square, and a hanging lug is arranged on the side face of the long key; the box body (5) is divided into an upper part, a middle part and a lower part, the box body is E-shaped when viewed from the side, the lower part of the box body is provided with a keyhole and a through hole, the upper part of the box body is a cylinder, the middle part of the box body is provided with a vertical sliding chute, the vertical baffle end of the driving baffle (6) is embedded into a U-shaped groove of the vertical sliding chute, the driving baffle (6) can slide up and down in the vertical sliding chute, the bottom of the vertical sliding chute is provided with a horizontal sliding chute, the cross section of the horizontal sliding chute is cross-shaped, and the horizontal sliding chute; the driving baffle (6) consists of two surfaces, wherein one surface is provided with a threaded hole, and the other surface is L-shaped; one end of the crank (2) is connected with the cylinder, the other end of the crank is provided with a circular ring with a key groove, the upper part of the rotating shaft (1) is fixed together by a long key (3), and the box body (5) and the rotating shaft (1) are fixed by a bolt (8); the long key (3) is pressed on the long baffle (9) under the action of the tension spring (4); one end of the long baffle (9) is extruded by a return spring (10), and the other end of the long baffle is fixed by the driving baffle (6); the return spring (10) is in a compressed state, one end of the return spring extrudes the box body (5), and the other end of the return spring extrudes the long baffle (9); the driving baffle (6) is controlled by a motor (7); the shell (11) is fixed on the surface of the box body (5).

2. A bus passenger door safety device as claimed in claim 1, wherein: the number of extension springs (4) is 1 at least, and box (5) are connected to one end, and long key (3) are connected to one end, provide the pull-up to long key (3).

3. A bus passenger door safety device as claimed in claim 1, wherein: the number of return springs (10) is at least 1.