CN204341052U - A kind of tramway train front shroud opening and closing structure - Google Patents

Abstract

The utility model discloses an opening and closing structure for a front cover plate of a tram. In view of the low floor height of the tram and easy access to the front cover, the front cover of the tram front cover opening and closing structure is mounted on the car body through at least one set of four-bar linkages in the vertical plane. Thus, the operator pushes up the front cover, and the four-bar linkage moves vertically around the vehicle body to open the front cover. The utility model adopts the mode of manual opening, does not need an additional power source, and has simple structure, practical function and stable performance.

Description

Opening and closing structure of a tram front cover

technical field

The utility model relates to the field of tram structures, in particular to an opening and closing structure for a front cover of a tram.

Background technique

The opening and closing of the existing front cover takes the EMU as the research object. The front cover is divided into two parts, the left and the right. The opening method of the front cover is to open left and right in the horizontal plane. Features such as opening direction, the opening and closing of the existing front cover have all adopted power sources such as pushing cylinders.

However, for low- and medium-speed trams, the radius of the curve is small, and the coupler has a large swing angle in the horizontal plane and the vertical plane, which requires the front cover to be lifted as a whole.

Therefore, it is a technical problem to be solved urgently in this field to realize rapid lifting of the tram front cover as a whole and to be in a stable state after being lifted.

Utility model content

In view of the low floor height of the tram car and the easy access to the front cover, the utility model aims to provide an opening and closing structure for the front cover of the tram. The opening and closing structure adopts a manual opening method without additional power sources. And the structure is simple, the function is practical, and the performance is stable.

In order to achieve the above object, the technical solution adopted in the utility model is:

A front cover opening and closing structure of a tram is characterized in that the front cover is mounted on the car body through at least one set of four-bar linkages in a vertical plane.

The vertical plane means that the movement track of the four-bar linkage mechanism is perpendicular to the horizontal plane, whereby the operator pushes the front cover upwards, and the four-bar linkage mechanism moves vertically around the vehicle body on the vehicle body to open the front cover .

Following is the further improved technical scheme of the utility model:

As a specific structural form, the four-bar linkage mechanism includes a fixed seat fixed on the vehicle body, a first rotating arm whose one end is hinged to the lower end of the fixed seat, and a second rotating arm whose end is hinged to the upper end of the fixed seat. The other end of a rotating arm is hingedly connected with one end of a connecting arm, and the other end of the connecting arm is hingedly connected with the other end of the second rotating arm, so that the fixed seat, the first rotating arm, the connecting arm and the second rotating arm form four Linkage mechanism; the connecting arm at the junction of the first rotating arm and the connecting arm is equipped with a connecting plate fixedly connected with the front cover.

In order to keep the front cover fixed when it is fully opened, the fixing seat is equipped with a locking device that locks the first rotating arm when the front cover is fully opened.

In order to prevent parts from being damaged due to excessive force exerted by the operator, a buffer device is installed on the fixing seat.

In order to prevent the front cover from being opened excessively, the fixing seat is equipped with a limiting device to prevent the first rotating arm or the second rotating arm from rotating excessively.

Preferably, two sets of four-bar linkages with the same structure are installed on the front cover, and the two sets of four-bar linkages with lateral gaps are installed on the same horizontal plane and the two sets of four-bar linkages are arranged symmetrically with respect to the center line of the vehicle body. Thus, the connection strength and stability of the front cover can be ensured.

Further, the first rotating arm and the second rotating arm are both bent parts, and the two rotating arms are arranged opposite to each other, and the connecting lines of the hinge points maintain a parallelogram, thereby forming a similar hexagonal structure.

With the above structure, the utility model fills the blank of the opening method of the integrated front cover of the tram, adopts the manual method, does not need an additional power source, is simple and practical, and makes the whole cover lift in the vertical plane and is in a stable state .

In order to lift the cover plate in the vertical plane as a whole, two sets of parallel four-bar linkage mechanisms are used. The two sets of mechanisms are symmetrical about the center line of the car body, and each set of mechanisms is guaranteed to have only one degree of freedom. When pulling force is manually applied to the cover plate, The connecting rod mechanism and the integral cover plate have a uniquely determined motion track. Two sets of connecting rod mechanisms and an integral cover plate, the connecting plate of the connecting rod mechanism and the integral cover plate, the limit device, the locking device, the buffer device, etc. constitute a complete set of opening and closing mechanism. As shown in Figure 1.

Each set of parallel four-bar linkage structure is composed of a fixed seat, two rotating arms and a connecting arm 4 . Its schematic diagram is shown in Figure 3.

Apply force in any direction to the integral front cover, this force will be transmitted to the connecting arm 4 shown in Figure 2, and then the four-bar linkage mechanism will start to rotate around the fixed point. As shown in Figure 4. At any position, the connecting arm 4 is parallel to the initial position (position A). When the first rotating arm 2 and the second rotating arm 3 turn to the horizontal position (position C), the integral front cover is at the forefront. When the rotating arm continues to move, the rotating arm and the connecting arm 4 will reach a collinear state. The rotating arm continues to move, and the moving position of the four-bar mechanism is shown as position E.

Considering engineering practicability, when the cover plate reaches the D position, the linkage mechanism is in a locked state, and the front cover plate is in a stable position.

Compared with the prior art, the beneficial effect of the utility model is: the opening and closing structure of the utility model can effectively support the front cover and make the front cover move along a specific track, and quickly move the front cover in the vertical plane. It is lifted to ensure that when the train is rescued or reconnected, the linkage mechanism is in a locked state and the front cover is in a specific position. At the same time, because the front cover is easy to access, the integral cover can be placed in a specific position manually without an additional power source.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Description of drawings

Fig. 1 is a closed state diagram of the cover plate in an embodiment of the present invention;

Fig. 2 is an open state diagram of the cover plate in an embodiment of the present invention;

Fig. 3 is a structural principle diagram of the four-bar linkage mechanism described in the utility model;

Fig. 4 is a running track diagram of a four-bar linkage mechanism of the present invention.

In the picture

1-fixed seat; 2-first rotating arm; 3-second rotating arm; 4-connecting arm; 5-connecting plate; 6-front cover; A-initial position; B-starting position of movement;

C-most front position; D-colinear position of four arms; E-open position.

detailed description

A tram front cover opening and closing structure, as shown in He 1 and 2, the front cover 6 is mounted on the car body through a vertically arranged four-bar linkage, and the four-bar linkage includes a fixed The fixed seat 1 on the car body, one end is hinged on the first rotating arm 2 at the lower end of the fixed seat 1, and one end is hinged on the second rotating arm 3 at the upper end of the fixed seat 1, and the other end of the first rotating arm 2 is connected with a connecting arm 4 One end of the connecting arm 4 is hingedly connected, and the other end of the connecting arm 4 is hingedly connected with the other end of the second rotating arm 3, so that the fixed seat 1, the first rotating arm 2, the connecting arm 4 and the second rotating arm 3 constitute a four-bar linkage mechanism; A connecting plate 5 fixedly connected to the front cover 6 is mounted on the connecting arm 4 at the junction of the first rotating arm 2 and the connecting arm 4 .

The material of the fixed seat, the rotating arm, the connecting arm 4 and the connecting plate can be selected from one of aluminum alloy material, stainless steel material and carbon steel material; the shape of the fixing seat, the rotating arm, the connecting arm 4 and the connecting plate can be selected arbitrarily , shown in Figure 1 is only one of them, and the connection lines at the connection points must satisfy the parallelogram relationship;

The joint between the rotating arm and the fixed seat, the joint between the rotating arm and the connecting arm 4 adopts a hinged relationship, and the realization of the hinged relationship can be a bolt connection, a pin connection or a bearing connection, etc.;

When the rotating arm rotates to the uppermost position, that is, position E in FIG. 4 , the locking device on the mounting seat locks the first rotating arm 2 .

The above-mentioned embodiments should be understood that these embodiments are only used to illustrate the utility model more clearly, and are not intended to limit the scope of the utility model. After reading the utility model, those skilled in the art will understand each aspect of the utility model The modifications of all equivalent forms all fall within the scope defined by the appended claims of the present application.

Claims (6)

1. a tramway train front shroud opening and closing structure, is characterized in that, described front shroud (6) is contained on car body by least one group of four-bar linkage in vertical plane surface; Described four-bar linkage comprises the permanent seat (1) be fixed on car body, one end is hinged on the first rotating arm (2) of permanent seat (1) lower end, one end is hinged on second pivot arm (3) of permanent seat (1) upper end, the other end of this first rotating arm (2) and one end of a connecting arm (4) are hinged and connected, the other end of this connecting arm (4) and the other end of the second pivot arm (3) are hinged and connected, and make permanent seat (1), first rotating arm (2), connecting arm (4) and the second pivot arm (3) form four-bar linkage; The connecting panel (5) be fixedly linked with front shroud (6) connecting arm (4) of described first rotating arm (2) and connecting arm (4) junction is equipped with.

2. tramway train front shroud opening and closing structure according to claim 1, is characterized in that, described permanent seat (1) is equipped with the locking device of locking first rotating arm (2) when front shroud (6) is opened completely.

3. tramway train front shroud opening and closing structure according to claim 1, is characterized in that, (1) is equipped with shock absorber with described permanent seat.

4. tramway train front shroud opening and closing structure according to claim 1, is characterized in that, described permanent seat (1) is equipped with and prevents first rotating arm (2) or the second pivot arm (3) from rotating excessive inhibiting device.

5. according to the tramway train front shroud opening and closing structure one of Claims 1-4 Suo Shu, it is characterized in that, described front shroud (6) is equipped with the four-bar linkage of two cover same structures, the two cover four-bar linkages with lateral clearance are arranged in same level and two cover four-bar linkages are arranged symmetrically with about car body line of centers.

6. according to the tramway train front shroud opening and closing structure one of Claims 1-4 Suo Shu, it is characterized in that, described first rotating arm (2) and the second pivot arm (3) are bending part, and two pivot arms are oppositely arranged, and the line keeping parallelism quadrangle of each hinge-point.