Bistable emergency unlocking device of rail transit door system

Abstract

The application discloses a kind of bistable emergency unlocking device of rail transit door system, including handle assembly and the fixed frame for fixing handle assembly, fixed frame middle part is equipped with fixed frame through hole, handle shaft of handle assembly is from top to bottom through the fixed frame through hole, the middle part of the handle shaft is equipped with the step structure of greater outer diameter compared with the rest of handle shaft, and the guide block of built-in inner pressure spring is arranged on the step structure;The bottom of step structure is connected with fixed frame by outer pressure spring and is arranged above fixed frame through hole;Reset limiting structure is equipped on the upper surface of fixed frame and located on the side of fixed frame through hole, and the inner side of reset limiting structure is respectively equipped with unlocking slot and reset slot, and the unlocking slot and reset slot are connected by transversely arranged upper step and lower step, and the guide block is clamped in the range of upper step, lower step, unlocking slot and reset slot.The application can limit the reset of emergency unlocking device and realize bistable function.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of bistable emergency unlocking device for rail transit door system in the field of rail transit vehicle door. BACKGROUND

[0002] The unlocking device of rail transit vehicle door system directly affects the operation of vehicle and its personnel safety.Emergency unlocking device is used for manually opening subway door when rail vehicle encounters abnormal vehicle condition, such as unable to open door or emergency situation.For the current common emergency unlocking device, after rotating handle, unlock, reverse operation handle can be directly reset;Or handle is not completely rotated in place, but is automatically reset by elastic element rebounding.The above-mentioned cases make the vehicle door which has been unlocked and manually opened be locked again, which will delay the unlocking of manually opening door in critical situation, and affect personnel escape. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, provide a bistable emergency unlocking device for rail transit door system, which can limit the reset of emergency unlocking device and realize the function of bistability.

[0004] One technical solution to achieve the above-mentioned purpose is: a bistable emergency unlocking device for rail transit door system, comprising handle assembly and fixing frame for fixing handle assembly, fixing frame middle part is provided with fixing frame through hole, handle shaft of handle assembly passes through the fixing frame through hole from top to bottom;

[0005] The middle part of the handle shaft is provided with a stepped structure with larger outer diameter than the rest of the handle shaft, and a guide block with built-in inner spring is arranged on the stepped structure;The bottom of the stepped structure is connected with the fixing frame by an outer spring and is arranged above the fixing frame through hole;Reset limiting structure is arranged on the upper surface of the fixing frame on one side of the fixing frame through hole, and the inner side of the reset limiting structure is respectively provided with unlocking slot and reset slot, and the unlocking slot and the reset slot are connected by horizontally arranged upper step and lower step, and the guide block is clamped in the range of upper step, lower step, unlocking slot and reset slot;

[0006] When handle assembly is rotated to unlocking position, handle shaft drives guide block to rotate, guide block moves along upper step, and finally pops out to reset slot, thereby limiting the rotation of handle assembly;When resetting handle assembly, outer spring is compressed by pressing handle assembly, so that guide block moves down to lower step, and moves along lower step under the driving of handle shaft and finally pops out to unlocking slot.

[0007] As a preferred, the guide block comprises a cylindrical support cylinder connected with the stepped structure and a guide column connected to the support cylinder by an inner spring and can be popped out.

[0008] As preferred, the starting position of the upper step is flush with the unlocking groove, and the thickness gradually increases from the unlocking groove to the reset groove, the starting position of the lower step is flush with the reset groove, and the thickness gradually increases from the reset groove to the unlocking groove.

[0009] Further as preferred, the two sides of the reset limiting structure are respectively provided with a baffle for limiting, and the thickness of the baffle is greater than the thickness of the thickest part of the upper step and the lower step.

[0010] As preferred, a cover plate is arranged above the fixing frame for closing the handle assembly and the reset limiting structure.

[0011] As preferred, an arch ring is arranged outside the through hole of the fixing frame for limiting the external compression spring and the step structure.

[0012] The bistable emergency unlocking device of the rail transit door system can effectively prevent the automatic reset of the unlocking device and the misoperation of non-professionals after emergency unlocking, and can only be unlocked by pressing the handle and then rotating the handle during reset, thereby achieving the double-stable protection effect. The structure and operation are simple, safe and reliable, and the emergency unlocking switch can be added according to the needs, and the unlocking reset state can be monitored at any time. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The bistable emergency unlocking device of the rail transit door system is a structural schematic explosion diagram. DETAILED DESCRIPTION

[0014] In order to better understand the technical solutions of the present application, the following will be described in detail through specific examples:

[0015] Please refer to Figure 1 The bistable emergency unlocking device of the rail transit door system. The bistable emergency unlocking device is installed and arranged through the fixing frame 8. The middle part of the fixing frame 8 is provided with a fixing frame through hole, and the handle shaft of the handle assembly 1 passes through the fixing frame through hole from top to bottom. The bottom of the handle shaft is provided with a pulley 9 and an elastic retainer ring 10, so as to realize the unlocking of the rail transit door.

[0016] The handle shaft is provided with a step structure 3 with a larger outer diameter than the rest of the handle shaft. The step structure 3 is provided with a guide block 5 with an internal compression spring. The guide block 5 includes a cylindrical support cylinder connected with the step structure and a guide column connected with the support cylinder through the internal compression spring 4 and can be externally elastic. The guide block 5 rotates with the rotation of the handle shaft.

[0017] The bottom of the stepped structure 3 is connected with the fixed frame through the outer compression spring 7 and is arranged above the fixed frame through hole. The fixed frame through hole is provided with a stop ring for limiting the outer compression spring and the stepped structure. A reset limiting structure 81 is arranged on the upper surface of the fixed frame at one side of the fixed frame through hole. The inner sides of the reset limiting structure are respectively provided with an unlocking slot 82 and a reset slot 83. The unlocking slot 82 and the reset slot 83 are connected through the horizontally arranged upper step 84 and lower step 85. The starting position of the upper step 84 is flush with the unlocking slot 82, and the thickness gradually increases from the unlocking slot 82 to the reset slot 83, and a break is formed at the reset slot 83. The starting position of the lower step 85 is flush with the reset slot 83, and the thickness gradually increases from the reset slot 83 to the unlocking slot 82, and a break is formed at the unlocking slot 82. The guide block 5 is clamped within the range of the upper step, the lower step, the unlocking slot and the reset slot. The two sides of the reset limiting structure 81 are respectively provided with a baffle for limiting. The thickness of the baffle is greater than the thickness of the thickest part of the upper step and the lower step, so as to prevent the guide block from falling out of the reset limiting structure.

[0018] The fixed frame 8 is provided with a cover plate 2 for closing the handle assembly and the reset limiting structure, and a mounting bracket assembly 6.

[0019] When the unlocking reset device is unlocked, the handle assembly is rotated to the unlocking position, the handle shaft drives the guide block 5 to rotate, the guide block 5 moves along the upper step 84 from the unlocking slot 82, at this time the inner compression spring 4 is compressed, and the guide column of the guide block is retracted. When rotated to the unlocking position, the guide block 5 is opposite to the reset slot 83 at this time, and is clamped into the reset slot 83 by the outer spring, so as to limit the rotation of the handle assembly. At this time, the handle cannot be rotated, so as to realize the automatic reset function.

[0020] When the reset device is reset, the handle assembly must be pressed first, which drives the handle shaft to move downward, and at the same time, the outer compression spring 7 is compressed, so that the guide block 5 slides downward along the reset slot 83. At this time, the handle assembly is rotated, and the guide block 5 moves along the lower step 85 under the drive of the handle shaft. When rotated to the reset position, the guide block 5 is opposite to the unlocking slot 82 at this time, and is clamped into the unlocking slot by the outer spring, and the handle assembly is also elastically lifted to the initial state before unlocking due to the elasticity of the outer compression spring 7, so as to complete the reset function.

[0021] Those skilled in the art should understand that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application. Any changes and modifications of the above described embodiments within the spirit and principle of the present application will fall within the scope of the claims of the present application.

Claims

1. A bistable emergency unlocking device for a rail transit door system, comprising a handle assembly and a mounting bracket for fixing the handle assembly, wherein a mounting bracket through hole is provided in the middle of the mounting bracket, and the handle shaft of the handle assembly passes through the mounting bracket through hole from top to bottom, characterized in that: The handle shaft has a stepped structure in the middle with a larger outer diameter than the rest of the handle shaft. A guide block with an internal compression spring is provided on the stepped structure. The bottom of the stepped structure is connected to the fixing frame through an external compression spring and is located above the through hole of the fixing frame. A reset limiting structure is provided on the upper surface of the fixing frame on one side of the through hole of the fixing frame. The inner sides of the reset limiting structure are provided with an unlocking groove and a reset groove, respectively. The unlocking groove and the reset groove are connected by a horizontally arranged upper step and a lower step. The guide block is engaged within the range of the upper step, the lower step, the unlocking groove, and the reset groove. When the handle assembly is rotated to the unlock position, the handle shaft drives the guide block to rotate. The guide block moves along the upper step and eventually springs out to the reset slot, thereby restricting the rotation of the handle assembly. When resetting the handle assembly, the outer compression spring of the handle assembly needs to be pressed, so that the guide block moves down to the lower step and moves along the lower step under the drive of the handle shaft and eventually springs out to the unlock slot.

2. The bistable emergency unlocking device for a rail transit door system according to claim 1, characterized in that, The guide block includes a cylindrical support cylinder connected to the stepped structure and a guide post that is connected to the support cylinder by an internal compression spring and can be rolled outward.

3. A bistable emergency unlocking device for a rail transit door system according to claim 1, characterized in that, The starting position of the upper step is flush with the unlocking groove, and the thickness gradually increases from the unlocking groove to the reset groove. The starting position of the lower step is flush with the reset groove, and the thickness gradually increases from the reset groove to the unlocking groove.

4. A bistable emergency unlocking device for a rail transit door system according to claim 3, characterized in that, The reset limiting structure is provided with baffles on both sides for limiting the position. The thickness of the baffles is greater than the thickness of the thickest part of the upper and lower steps.

5. A bistable emergency unlocking device for a rail transit door system according to claim 1, characterized in that, The top of the mounting bracket is equipped with a cover plate for sealing the handle assembly and the reset limit structure.

6. A bistable emergency unlocking device for a rail transit door system according to claim 1, characterized in that, A retaining ring is provided on the outside of the through hole of the fixing bracket to limit the external compression spring and the stepped structure.

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