CN203473033U - Driving cab positioning and error-preventing device - Google Patents

Abstract

The utility model relates to a cab positioning error prevention device, which includes a cab and an upper and lower platform, and its structural feature is that an electric control lock is installed on the door of the cab, and a useful The sensor switch is used to control the on-off of the power circuit of the electric control lock; the device also includes an intermediate relay and an indicator light. In the power circuit, another normally open contact of the intermediate relay is connected in series with the power supply circuit of the indicator light. The utility model makes it possible to open the door only when the cab is turned to correspond to the upper and lower platforms, thereby avoiding the falling accident caused by the driver opening the door by mistake.

Description

A cab positioning error prevention device

technical field

The utility model relates to the field of safe operation of engineering machinery, in particular to a cab positioning error prevention device.

Background technique

The cabs of engineering machinery such as excavators and cranes are rotatable, and one side of the cab is provided with an upper and lower platform for the driver to get on and off the car. When the cab is turned to the door corresponding to the upper and lower platforms, the driver can Open the chamber door and get off through the upper and lower platforms. Due to the intricate working environment of construction machinery, if the driver opens the door when the driver's cab is not turned to correspond to the platform, it will cause safety accidents such as falling from a high altitude.

Utility model content

The technical problem to be solved by the utility model is to provide a driver's cab positioning error prevention device, the device can only open the door when the driver's cab rotates to the door corresponding to the upper and lower platforms, so as to prevent the driver from opening the door by mistake resulting in a fall accident.

In order to solve the above-mentioned technical problems, the anti-mis-opening device for construction machinery rotating cab of the utility model includes a cab and upper and lower platforms. An inductive switch for controlling the on-off of the power circuit of the electric control lock is installed between the upper and lower platforms.

With the above structure, the induction switch is used to sense whether the door of the cab is corresponding to the upper and lower platforms. When the induction switch senses that the cab is corresponding to the upper and lower platforms, it can conduct the power circuit of the electric control lock, and the electric control lock is opened electrically. , the driver can open the door, in other cases the sensor switch is off, the electric control lock locks the door, so as to prevent the driver from opening the door by mistake.

The utility model also includes an intermediate relay and an indicator light, the induction switch is connected in series in the power supply circuit of the intermediate relay coil, one of the normally open contacts of the intermediate relay is connected in series in the power supply circuit of the electric control lock, and the other normally open contact of the intermediate relay is The points are connected in series in the power supply circuit of the indicator light. Described indicator light is installed on the control panel in the cab. When the electric control lock is activated and the indicator light is energized at the same time, the indicator light is on when the electric control lock is opened, which is convenient for the driver to observe directly.

The induction switch includes a limit switch body installed at the bottom of the cab and a limit block installed on the upper and lower platforms for triggering the limit switch body.

The induction switch includes a photoelectric switch body installed at the bottom of the cab and a photoelectric switch receiver installed on the upper and lower platforms and used to trigger the photoelectric switch body.

To sum up, the utility model makes it possible to open the door only when the driver's cab rotates until the door corresponds to the upper and lower platforms, thereby avoiding the falling accident caused by the driver opening the door by mistake.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic circuit diagram of the utility model.

Detailed ways

With reference to the accompanying drawings, the driver's cab positioning error prevention device of the present utility model includes a driver's cab 1 and an upper and lower platform 2, an electric control lock 4 is installed on the door 3 of the driver's cab 1, and an electric lock 4 is installed between the bottom of the driver's cab 1 and the upper and lower platforms 2. There is an inductive switch 5 for controlling the on-off of the electric control lock 4 power circuit. The induction switch 5 is used to sense whether the door 3 of the cab 1 corresponds to the upper and lower platforms 2. When the induction switch 5 senses that the cab 1 corresponds to the upper and lower platforms 2, it can conduct the power circuit of the electric control lock 4, and the electric control Lock 4 gets electricity and opens, and the driver can open chamber door 3, and induction switch 5 is in off state in other cases, and electric control lock 4 locks chamber door 3, thereby prevents the driver from opening chamber door 3 by mistake.

In the aforementioned structure, the induction switch 5 can be directly connected in series in the power circuit of the electric control lock 4 , or indirectly control the on-off of the power circuit of the electric control lock 4 through the intermediate relay 6 . Referring to Fig. 2, the utility model also includes an intermediate relay 6 and an indicator light 7, and the inductive switch 5 is connected in series in the power supply circuit of the coil of the intermediate relay 6, and the commonly used intermediate relay 6 generally has a plurality of normally open contacts and normally closed contacts One of the normally open contacts 61 of the intermediate relay 6 is connected in series in the power circuit of the electric control lock 4 , and another normally open contact 62 of the intermediate relay 6 is connected in series in the power supply circuit of the indicator light 7 . Indicator light 7 can be installed on the control panel in the driver's cab 1. The electric control lock 4 and the indicator light 7 are energized at the same time, that is, the indicator light 7 is turned on when the electric control lock 4 is opened, and the driver realizes that the cab 1 has rotated to the door 3 and the upper and lower platforms 2 after observing the light 7. Correspondingly, the chamber door 3 can be opened.

With reference to the accompanying drawings, the inductive switch 5 can adopt various structural forms such as mechanical trigger type, electromagnetic type or photoelectric type. In the utility model, two kinds of inductive switches 5 are enumerated. The first inductive switch 5 includes The limit switch body and the limit block installed on the upper and lower platforms 2 and used to trigger the limit switch body. The second induction switch 5 includes a photoelectric switch body installed at the bottom of the cab 1 and a photoelectric switch receiver installed on the upper and lower platforms 2 and used to trigger the photoelectric switch body.

With reference to Fig. 2, in the present utility model, two inductive switches 5 can be provided, and two intermediate relays 6 corresponding to the inductive switches are also provided with two, and the indicator lights 7 controlled by the intermediate relay 6 are also two, and the two intermediate relays 6 are used for The two normally open contacts used to control the electric control lock 4 are connected in series in the power circuit of the electric control lock 4 . This setting can realize double insurance and ensure the reliability of the device. For the power supply of the intermediate relay 6 and the indicator light 7, it can be completed by the switching power supply 8, as shown in Fig. 2, the switching power supply 8 converts AC220V into DC24V output. For the power supply of the electric control lock 4, it adopts the structure of the transformer 9 and the rectifier bridge 10 to convert AC220V into DC12V.

To sum up, the utility model is not limited to the above specific embodiments. Those skilled in the art can make several changes and modifications without departing from the spirit and scope of the present utility model. The protection scope of the utility model should be based on the claims of the utility model.

Claims (5)

1. an operator's compartment is located error prevention device, comprise operator's compartment (1) and upper lower platform (2), it is characterized in that, on the chamber door (3) of described operator's compartment (1), electric control lock (4) is installed, between the bottom of operator's compartment (1) and upper lower platform (2), be provided with for controlling the inductive switch (5) of electric control lock (4) electric power loop break-make.

2. operator's compartment as claimed in claim 1 is located error prevention device, it is characterized in that this device also comprises intermediate relay (6) and indicator lamp (7), inductive switch (5) is connected in the current supply circuit of intermediate relay (6) coil, one of them open contact of intermediate relay (6) (61) is connected in the electric power loop of electric control lock (4), and the other open contact (62) of intermediate relay (6) is connected in the current supply circuit of indicator lamp (7).

3. operator's compartment as claimed in claim 2 location error prevention device, is characterized in that described indicator lamp (7) is arranged on the control panel in operator's compartment (1).

4. operator's compartment location error prevention device as claimed any one in claims 1 to 3, it is characterized in that described inductive switch (5) comprise be arranged on the limit switch body of operator's compartment bottom (1) and be arranged on lower platform (2) upper and for triggering the limiting stopper of limit switch body.

5. operator's compartment location error prevention device as claimed any one in claims 1 to 3, it is characterized in that described inductive switch (5) comprise be arranged on the photoelectric switch body of operator's compartment (1) bottom and be arranged on lower platform (2) upper and for triggering the photoelectric switch receptor of photoelectric switch body.

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