An opening and closing mechanism for sand injection into seats in passenger compartments of railway vehicles

Abstract

The present invention provides an opening and closing mechanism for sand injection in passenger compartment seats of rail vehicles, including a seat frame and a headrest assembly. The seat frame is provided with a linear guide rail, the lower end of the headrest assembly is connected to a slider, the slider and the linear guide rail are slidably matched, a lock box is provided on the seat frame, and a lock card that cooperates with the lock box to lock and open is provided on the inner side of the headrest assembly. The present invention forms an opening and closing mechanism through the linear guide rail of the seat frame and the connecting slider on the headrest assembly. When the vehicle needs to be injected with sand, the operator opens the opening and closing mechanism at the seat headrest, connects the sand injection pipe to the sandbox, and injects sand into the vehicle. At the same time, the lock box on the seat frame cooperates with the lock card provided on the inner side of the headrest assembly to form a hidden locking device, which overcomes the disadvantage of the traditional locking device being exposed and unsightly. The present invention has a simple structure and is easy to operate. At the same time, it is not affected by seasonal temperature, and the operator can perform sand injection operations in the vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicle passenger compartment seat design, and in particular relates to an opening and closing mechanism for injecting sand into passenger compartment seats. Background Art

[0002] With the continuous construction and development of rail transit in major and medium-sized cities in recent years, the market demand for various components of rail transit vehicles has become increasingly strong. As an important part of urban transportation, rail passenger cars have a complex operating environment. In order to increase the friction coefficient of the track and provide sufficient traction and braking force, rail passenger cars are required to be equipped with sand spreading devices.

[0003] The opening and closing mechanism of the traditional sand injection machine is set outside the vehicle, using a rotating hinge mechanism, which has a limited opening and closing angle, and the locking device is exposed, which is not beautiful. In cold areas in winter, due to the low temperature outside the vehicle, such a vehicle sand injection port mechanism is not easy for vehicle operators to inject sand. Therefore, a new type of opening and closing mechanism is needed to be applied to the seats inside the rail passenger car to meet the sand injection needs inside the vehicle. Summary of the invention

[0004] The invention aims to solve the problem of inconvenience in injecting sand outside a vehicle in severely cold areas in winter, and provides an opening and closing mechanism for injecting sand inside a vehicle, so as to avoid the inconvenience caused to vehicle operators by the operation outside the vehicle for injecting sand.

[0005] To achieve the above-mentioned purpose of the invention, the present invention provides an opening and closing mechanism for injecting sand into the passenger compartment seats of railway vehicles, which is characterized by comprising a seat frame and a headrest assembly, a linear guide rail being provided on the seat frame, a slider being connected to the lower end of the headrest assembly, the slider slidingly cooperates with the linear guide rail, a lock box being provided on the seat frame, and a lock card being provided on the inner side of the headrest assembly for locking and opening in cooperation with the lock box.

[0006] Furthermore, a stopper is provided on the seat frame to limit the position of the slider and prevent the headrest assembly from sliding out of the linear guide rail.

[0007] Furthermore, two rows of balls are arranged inside the ball slider, and the balls roll freely inside the ball slider. The linear guide rail extends into the ball slider and slides between the two rows of balls.

[0008] Furthermore, a hook is provided under the lock card, a lock box hook and a lock box hook shaft are provided in the lock box, the lock box hook shaft has a spring, the lock box hook and the lock box hook shaft rotate in cooperation, the lock box hook is placed in the hook groove under the lock card and overlaps with the hook under the lock card.

[0009] Furthermore, the overlapping surface between the lock box hook and the hook under the lock card is a curved surface or an inclined surface, which facilitates the opening and closing between the hook under the lock card and the lock box hook.

[0010] The present invention forms an opening and closing mechanism through the linear guide rail of the seat frame and the connecting slider on the headrest. When the vehicle needs to be filled with sand, the operator opens the opening and closing mechanism at the seat headrest and connects the sand injection pipe to the sand box to achieve sand injection in the vehicle. At the same time, the lock box on the seat frame cooperates with the lock card provided on the inner side of the headrest to form a hidden locking device, which overcomes the disadvantage of the traditional locking device being exposed and unsightly. The present invention has a simple structure and is easy to operate. It is not affected by seasonal temperature, and the operator can perform sand injection in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the opening and closing mechanism of the present invention in a locked state;

[0012] Figure 2 This is a schematic diagram of the structure of the opening and closing mechanism of the present invention in the open state;

[0013] Figure 3 It is a cross-sectional view of the engineering process state of the present invention;

[0014] Figure 4 It is an enlarged schematic diagram of the sliding fit mechanism of the present invention;

[0015] Figure 5 It is an enlarged schematic diagram of the locking mechanism of the present invention;

[0016] Figure 6-1 This is a schematic diagram of the cooperation between the linear guide rail and the ball slider of the present invention;

[0017] Figure 6-2 For along Figure 6-1 Section view along line AA.

[0018] Figure 7 It is a schematic diagram of the hidden lock structure of the present invention.

[0019] Among them: 1-seat frame, 2-headrest component, 3-linear guide rail, 4-ball slider, 4-1-ball, 5-hidden lock, 5-1-lock box, 5-2-lock card, 6-sandbox, 7-stopper, 5-1-1-lock box hook, 5-1-2-lock box hook shaft, 5-2-1-hook, DETAILED DESCRIPTION

[0020] Reference Figure 1-Figure 5The specific implementation of the present invention includes a seat frame 1, a headrest assembly 2, a linear guide 3 is provided on the seat frame, a ball slider 4 is connected to the lower end of the headrest assembly, the ball slider 4 is slidably matched with the linear guide 3, and a hidden lock 5 is provided on the seat frame 1. The hidden lock includes a lock box 5-1 provided on the seat frame and a lock card 5-2 provided on the inner side of the headrest assembly that cooperates with the lock box to lock and open the locking mechanism. A stopper 7 is provided on the seat frame to limit the ball slider, and the sandbox 6 has a sand injection interface. The sand injection pipe extends into the opening under the headrest and connects to the sand injection interface of the sandbox 6 for sand injection. The closing movement is the reverse movement of the opening.

[0021] Reference Figure 6-1 , 6-2 Two rows of balls 4-1 are arranged inside the ball slider 4. The balls 4-1 can roll freely inside the ball slider. The linear guide 3 extends into the ball slider 4. Between the two rows of balls 4-1, when the ball slider 4 performs linear pair motion on the linear guide 3, the balls 4-1 inside the ball slider 4 rotate and form rolling friction with the linear guide 3.

[0022] Reference Figure 7 , a hook 5-2-1 is provided under the lock card 5-2, and the lock box 5-1 is provided with a lock box hook 5-1-1 and a lock box hook shaft 5-1-2; the lock box hook shaft 5-1-2 has its own spring, and the lock box hook 5-1-1 can rotate around the lock box hook shaft 5-1-2 and reset under the action of its own spring. When the lock card 5-2 is inserted into the lock box 5-1, the lock box hook 5-1-1 and the lock box hook shaft 5-1-2 are hooked with each other and cannot be opened; when the lock card 5-2 is subjected to a thrust greater than 30N, the hook 5-2-1 is separated from the lock box hook 5-1-1, and the lock box hook 5-1-1 is reset under the action of the lock box hook shaft 5-1-2.

[0023] Reference Figure 1-Figure 3 During the sand injection operation, the operator uses a force of 30N to push the seat headrest assembly 2 upwards. The hidden lock 5 is automatically unlocked after being subjected to the force, and the lock card 5-2 is separated from the lock box 5-1. The ball slider moves upward along the linear guide with the headrest assembly until it hits the stopper 7 on the seat frame and stops. The ball slider is limited and the seat headrest assembly cannot continue to open upwards. At this time, the operator extends the sand injection pipe into the opening under the headrest and connects the sand box 6 with the sand injection interface to inject sand. The closing movement is the reverse movement of the opening. When the force is less than 30N, the lock box and the lock card cannot be separated, and the headrest assembly cannot move.

Claims

1. An opening and closing mechanism for sand injection into a passenger compartment seat of a railway passenger car, characterized in that: It includes a seat frame and a headrest component. The seat frame is provided with a linear guide rail. The lower end of the headrest component is connected to a slider. The slider and the linear guide rail are slidably matched. A lock box is provided on the seat frame. A lock card is provided on the inner side of the headrest component to lock and open in cooperation with the lock box. A hook is provided under the lock card, a lock box hook and a lock box hook shaft are provided in the lock box, the lock box hook shaft has a spring, the lock box hook and the lock box hook shaft rotate in cooperation, the lock box hook is placed in the hook groove under the lock card and overlaps with the hook under the lock card; The slider is a ball slider, and two rows of balls are arranged inside the ball slider. The balls roll freely inside the ball slider, and the linear guide extends into the ball slider and slides between the two rows of balls. The ball slider moves upward along the linear guide rail along with the headrest assembly to expose the opening under the headrest, and the sand injection pipe extends into the opening under the headrest to connect with the sand injection interface of the sand box.

2. The opening and closing mechanism for sand injection in passenger compartment seats of railway passenger vehicles according to claim 1, characterized in that: A stopper is provided on the seat frame to limit the slider and prevent the headrest assembly from sliding out of the linear guide rail.

3. The opening and closing mechanism for sand injection in passenger compartment seats of railway passenger vehicles according to claim 1, characterized in that: The overlapping surface between the lock box hook and the hook under the lock card is a curved surface or an inclined surface, which facilitates the opening and closing between the hook under the lock card and the lock box hook.

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