A sear and locking mechanism

Abstract

The present invention discloses a sela and locking mechanism, which includes a frame, a sela guide slideway, a slide rail, a driving assembly, a door carrier, a connecting rod, a driven member and a limiting member. The sela guide slideway is horizontally fixed at a position near the bottom of the frame; the slide rail is slidably connected to the longitudinal track of the frame and is arranged horizontally; the driving assembly is rotatably connected to the frame; the door carrier is slidably connected to the slide rail; the driving assembly is connected to the door carrier through a connecting rod; the driven member is in rolling connection with the sela guide slideway, and the driven member is rotatably connected to the door carrier; the limiting member is fixed on the frame and extends near the extension end of the driving assembly. The present invention has the advantages of simple structure, high reliability, stable operation, low noise, high conversion rate of sela force, high transmission efficiency of the mechanism and wide application range.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and more specifically, to a plug and lock mechanism. Background Art

[0002] The plug and lock mechanisms used in existing plug doors mainly include the following: 1. Driven by two motors respectively, and the plug movement is completed through electric control; 2. Driven by a single motor, a screw is driven by a spiral to drive a nut assembly arranged on the screw to perform reciprocating movement, and then drive the door leaf connected to the nut assembly, and an electromagnetic lock is used to lock the nut assembly to realize the function of locking the door; 3. Driven by a single motor, a nut assembly is driven by a specially designed lead screw to realize the plug movement, and its passive locking in place is realized through the non-spiral tooth surface on the lead screw, and the structure is simple.

[0003] However, for the first method, the electric control system is complex, the cost is high, and the reliability is not high; for the second method, the electromagnetic lock must be powered on at all times to ensure the stability of locking the door, the structure is complex, and the reliability is not high; for the third method, the lead screw is not a traditional thread, and special processing and customization are required, and the manufacturing cost is high. Moreover, in order to realize passive locking, the nut assembly needs to contact the lead screw both in the threaded section and the straight section. In this way, the lead screw and the nut are no longer a traditional screw drive, but a kind of cam drive. The nut assembly and the lead screw are a high-pair drive. This kind of drive is easy to wear and has a large noise. In addition, the plug door force of this method is small, and an auxiliary device needs to be designed to make the nut assembly rotate a certain angle to realize passive locking.

[0004] Therefore, it is an urgent problem for those skilled in the art to provide a plug and lock mechanism with stable and reliable operation. Summary of the Invention

[0005] In view of this, the present invention provides a plug and lock mechanism to solve the technical problems mentioned in the above background art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A plug and lock mechanism includes a frame, a plug guide slideway, a slide rail, a driving assembly, a door carrier, a connecting rod, a driven member and a limiting member. The plug guide slideway is horizontally fixed at a position near the bottom of the frame; the slide rail is slidably connected to the longitudinal track of the frame and is arranged horizontally; the driving assembly is rotatably connected to the frame; the door carrier is slidably connected to the slide rail; the driving assembly is connected to the door carrier through the connecting rod; the driven member is in rolling connection with the plug guide slideway, and the driven member is connected to the door carrier; the limiting member is fixed on the frame and extends near the extension end of the driving assembly.

[0008] By adopting the above solutions, the beneficial effects of the present invention are as follows:

[0009] The active component and the door-carrying frame rotatably connected to the driven member are connected by a connecting rod. On the one hand, it avoids the need for special customization of the active component and the formation of high pair contact. The existing lead screw structure can be used, resulting in smoother operation, lower noise, and longer service life. On the other hand, it realizes passive locking, with a simple and reliable structure, low manufacturing cost, and high system integration. Finally, it improves the conversion rate of plug pulling force and has high transmission efficiency.

[0010] Further, the active component includes a lead screw and a nut. The two ends of the lead screw are respectively rotatably connected to the frame; the nut is in screw transmission connection with the lead screw; one end of the connecting rod is rotatably connected to the nut, and the other end of the connecting rod is rotatably connected to the door-carrying frame.

[0011] The beneficial effect of adopting the above further technical solution is that the nut and the door-carrying frame are connected by a connecting rod for transmission.

[0012] Further, the driven member is a guide wheel, and the guide wheel is in rolling or sliding connection with the plug guide slideway. Correspondingly, the guide wheel is rotatably connected or fixedly connected to the door-carrying frame.

[0013] The beneficial effect of adopting the above further technical solution is that the sliding connection between the door-carrying frame and the plug guide slideway is realized.

[0014] Further, the plug guide slideway includes a horizontal section and a downwardly inclined curved section connected as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0016] Figure 1 The drawings are a schematic structural diagram of a plug and locking mechanism provided by the present invention in a partially open state;

[0017] Figure 2 The drawings are a schematic structural diagram of a plug and locking mechanism provided by the present invention in a locked state. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention, especially the two main factors that do not change the subject of the present invention: the arc transition section is in the shape of a reverse arc curve and the straight line and the arc structure transition should be within the content disclosed by the present invention.

[0019] like Figure 1 , 2 As shown, an embodiment of the present invention discloses a plug and locking mechanism, including a frame 1, a plug guide slide 2, a slide rail 3, an active component, a door frame 4, a connecting rod 5, a follower 6 and a limiter 7, wherein the plug guide slide 2 is horizontally fixed on the frame 1 near the bottom; the slide rail 3 is slidingly connected to the longitudinal track of the frame 1 and is arranged horizontally, that is, the slide rail 3 can slide in the vertical direction of the frame 1; both ends of the active component are rotatably connected to the frame 1; the door frame 4 is slidably connected to the slide rail 3, that is, the door frame 4 can slide horizontally along the slide rail 3; the active component is connected to the door frame 4 through the connecting rod 5; the follower 6 is rollingly connected to the plug guide slide 2, and the follower 6 is connected to the door frame 4; the limiter 7 is fixed on the frame 1 and close to the extended end of the active component. The active component of the present invention and the door carrier 4 rotatably connected to the driven member 6 are connected by a connecting rod 5. On the one hand, it avoids the need for special customization of the active component and the formation of high-pair contact, and can use the existing screw structure, which has smoother operation, lower noise and longer service life; on the other hand, it realizes passive locking, has a simple and reliable structure, low manufacturing cost and high system integration; finally, the plug pull force conversion rate is improved and the transmission efficiency is high.

[0020] Specifically, the active component includes a screw 8 and a nut 9, both ends of the screw 8 are rotatably connected to the frame 1 respectively; the nut 9 is spirally connected to the screw 8; one end of the connecting rod 5 is rotatably connected to the nut 9, and the other end of the connecting rod 5 is rotatably connected to the door carrying frame 4.

[0021] Specifically, the follower 6 is a guide wheel, which is rollingly or slidingly connected to the Sierra guide slide 2, and correspondingly, the guide wheel is rotationally or fixedly connected to the door carrier 4.

[0022] Specifically, the Sierra guide slide 2 includes a horizontal section and a downwardly inclined curved section that are connected as one.

[0023] Working principle of the present invention:

[0024] The lead screw 8 rotates, thereby driving the nut 9 to translate along the axial direction of the lead screw 8, and the nut 9 drives the connecting rod 5 to drive the door frame 4 to move, that is, the nut 9 and the door frame 4 are connected by the connecting rod 5, and the door frame 4 translates laterally along the slide rail 3. At the same time, the door frame 4 rolls along the Serra guide slide 2 under the action of the guide wheel, that is, a spatial cam motion pair is formed. When it is close to the position of the limiter 7, the Serra guide slide 2 is limited and guided by the trajectory (calculated using the degrees of freedom, the number of degrees of freedom of the Serra and locking door mechanism is equal to the number of power sources, which is a fixed trajectory motion), and the slide rail 3 translates longitudinally along the frame 1. At this time, the angle between the connecting rod 5 and the sliding direction of the door frame 4 becomes larger. When the nut 9 is in mechanical limit contact with the limiter 7, the angle between the connecting rod 5 and the sliding direction of the door frame 4 is greater than or equal to 90 degrees, and a horizontal left component force will be generated. This force will force the nut 9 to contact more closely with the limiter 7, that is, the more it opens, the tighter it is, thereby forming a dead point connecting rod transmission and realizing passive locking. It is worth mentioning that in actual products, the sealing force of the Sierra door strip, the leaning force of the passenger and the auxiliary elastic structure can all achieve this locking preload.

[0025] Of course, in actual use, the screw 8 is driven by a drive motor. This part is existing technology and will not be elaborated here. When the nut 9 is in mechanical limit contact with the limit member 7, the drive motor stops rotating (of course, in order to improve the level of intelligent automation, a sensor is installed on the limit member 7. Once contact with the nut 9 is detected, the information is transmitted to the controller, thereby controlling the drive motor to stop rotating).

[0026] In the above process, the sliding direction angle between the connecting rod 5 and the door carrying frame 4 is large when the door is closed, while the angle is small during the horizontal movement. Through force decomposition analysis, the transmission force of the nut 9 is converted into the closing force at a very high ratio regardless of the movement of the door or the horizontal movement, and the transmission efficiency is very high.

[0027] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0028] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sela and locking mechanism, characterized in that it includes a frame (1), a sela guide slideway (2), a slide rail (3), a driving assembly, a door carrier (4), a connecting rod (5), a driven member (6) and a limiting member (7). The sela guide slideway (2) is horizontally fixed at a position near the bottom of the frame (1); the slide rail (3) is slidably connected to the longitudinal rail of the frame (1) and is arranged horizontally; the driving assembly is rotatably connected to the frame (1); the door carrier (4) is slidably connected to the slide rail (3); the driving assembly is connected to the door carrier (4) through the connecting rod (5); the driven member (6) is in rolling connection with the sela guide slideway (2), and the driven member (6) is connected to the door carrier (4); the limiting member (7) is fixed on the frame (1) and extends near the extension end of the driving assembly; The driving assembly includes a lead screw (8) and a nut (9), and both ends of the lead screw (8) are rotatably connected to the frame (1); The nut (9) is in screw drive connection with the lead screw (8); one end of the connecting rod (5) is rotatably connected to the nut (9), and the other end of the connecting rod (5) is rotatably connected to the door carrier (4). When the nut (9) is in mechanical limit contact with the limiting member (7), the included angle between the connecting rod (5) and the sliding direction of the door carrier (4) is greater than or equal to 90 degrees at this time; The slide rail (3) is slidably connected to the longitudinal rail of the frame (1), and the movement direction of the slide rail (3) is perpendicular to the axis direction of the lead screw (8); The sela guide slideway includes a horizontal section and a downwardly inclined curved section connected as a whole; The driven member (6) is a guide wheel, and the guide wheel is in rolling or sliding connection with the sela guide slideway (2). Correspondingly, the guide wheel is rotatably connected or fixedly connected to the door carrier (4).

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