Device for limiting lifting height of movable arm of excavator

Abstract

The utility model discloses a device for limiting the lifting height of a movable arm of an excavator, which is characterized in that the movable arm is arranged on one side of an excavator body, the movable arm is connected with a bucket rod, an alarm is arranged in a cab, an angle sensor is arranged on the movable arm, two extended side plates are arranged at the end part of the bucket rod, and a distance sensor assembly is arranged between the two side plates. The ultrasonic radar is arranged to detect the distance of objects above the movable arm and the bucket rod, lifting of the excavator can be reminded and limited, collision accidents are avoided, the angle sensor is further arranged, the lifting height of the movable arm can be limited, the movable arm and the bucket rod are prevented from making contact with thin foreign matter such as a high-voltage cable above, and the safety of the excavator is improved. Electric shock danger is avoided, the problem that the mass of the accessory is too large, the swing amplitude of the accessory is too large due to the fact that the movable arm is lifted too high can be avoided, and accidents such as mechanical collision are avoided.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, specifically a device for limiting the lifting height of an excavator boom. Background Technology

[0002] An excavator, also known as a digging machine or a soil excavator, is an earthmoving machine that uses a bucket to dig materials above or below the machine's bearing surface and load them into transport vehicles or unload them into a stockpile.

[0003] Excavators primarily excavate soil, coal, silt, and pre-loosened soil and rock. In recent years, excavators have seen relatively rapid development in the construction machinery industry, becoming one of the most important pieces of machinery in engineering projects. Currently, in confined spaces such as under bridges, above high-voltage cables, or over obstacles, the operator relies mainly on visual estimation to control the boom's lifting height. Due to the operator's limited perspective, inaccurate judgments can lead to collisions, electric shocks, or equipment damage. Furthermore, excessively heavy attachments can cause excessive boom sway, resulting in mechanical collisions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a device for limiting the lifting height of an excavator boom, thereby solving at least one of the aforementioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for limiting the lifting height of an excavator boom includes an excavator body, a main valve is provided inside the excavator body, a control handle is provided in the cab, the control handle is connected to a pilot valve, the pilot valve is connected to the main valve through a boom lifting oil circuit, a cab is provided on the excavator body, a boom is provided on one side of the excavator body, a stick is connected to the boom, an alarm is provided in the cab, an angle sensor is provided on the boom, and an extended side plate is provided at the end of the stick, the number of side plates is two, and a distance sensor assembly is provided between the side plates;

[0006] The distance sensor assembly includes a distance sensor base, connecting shafts on both sides of the distance sensor base, the connecting shafts being connected to a side plate via bearings, a distance sensor being disposed above the distance sensor base, and a counterweight being disposed at the bottom of the distance sensor base;

[0007] The boom lifting hydraulic circuit is equipped with a proportional solenoid valve, and the cab is equipped with a controller. The controller is electrically connected to the distance sensor, angle sensor, alarm, and proportional solenoid valve.

[0008] Furthermore, the distance sensor is an ultrasonic radar.

[0009] Furthermore, the angle sensor is an inertial angle sensor.

[0010] Furthermore, the alarm includes an alarm light and a buzzer.

[0011] Furthermore, the controller is electrically connected to a touchscreen.

[0012] The beneficial effects of this utility model are:

[0013] This invention incorporates an ultrasonic radar to detect the distance to objects above the boom and stick, alerting and limiting the excavator's lifting to prevent collisions. It also includes an angle sensor to limit the boom's lifting height, preventing contact between the boom and stick and thin objects such as high-voltage cables, thus avoiding electric shock hazards. Furthermore, it prevents excessive attachment weight or excessive boom lifting from causing excessive attachment swing, thus avoiding mechanical collisions and other accidents. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the distance sensor assembly structure of this utility model.

[0016] Figure 3 This is a schematic diagram showing the connection of the various components of this utility model.

[0017] Figure 4 This is a schematic diagram of the boom lifting oil circuit connection of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] Excavator body 1; cab 2; alarm 21; boom 3; angle sensor 4; stick 5; side wall 51; distance sensor assembly 6; distance sensor seat 61; connecting shaft 62; distance sensor 63; counterweight 64. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] Example 1: See Figures 1 to 4This is a schematic diagram of the various structures of this utility model, including an excavator body 1, a main valve installed inside the excavator body 1, a control handle installed inside the cab 2, the control handle being connected to a pilot valve, the pilot valve being connected to the main valve through a lifting oil circuit of the boom 3, the cab 2 being installed on the excavator body 1, the boom 3 being installed on one side of the excavator body 1, the boom 3 being connected to a stick 5, an alarm 21 being installed inside the cab 2 to alert the user, an angle sensor 4 being installed on the boom 3 to sense the tilt angle of the boom 3 and transmit it to the controller, and an extended side plate being installed at the end of the stick 5, so that during operation, the extended side plate of the stick 5 can always be at the highest point of the excavator as a whole, there are two side plates, and a distance sensor assembly 6 is installed between the side plates;

[0022] The distance sensor assembly 6 includes a distance sensor base 61, with connecting shafts 62 on both sides of the distance sensor base 61. The connecting shafts 62 are connected to the side plates via bearings. A distance sensor 63 is installed above the distance sensor base 61, and a counterweight 64 is installed at the bottom of the distance sensor base 61. No matter how the boom 3 and stick 5 move, the distance sensor 63 always remains upward.

[0023] The boom 3 lifting oil circuit is equipped with a proportional solenoid valve, which is used to cut off or connect the boom 3 lifting oil circuit. The cab 2 is equipped with a controller, which is electrically connected to the distance sensor 63, the angle sensor 4, the alarm 21, and the proportional solenoid valve.

[0024] Furthermore, the distance sensor 63 is an ultrasonic radar that senses distance.

[0025] Furthermore, the angle sensor 4 is an inertial angle sensor 4, such as a gyroscope.

[0026] Furthermore, the alarm 21 includes an alarm light and a buzzer, providing simultaneous audio and visual alerts to the user.

[0027] Furthermore, the controller is electrically connected to a touchscreen, through which signals are transmitted to the controller.

[0028] When using this invention, when the excavator is working under a low-lying bridge, when the boom 3 is raised, the ultrasonic radar above the stick 5 senses the distance to the object above and transmits a signal to the controller. When the ultrasonic radar senses that the distance to the object above is less than 50 cm, the alarm light flashes and the buzzer sounds with a 1-second interval. When the ultrasonic radar senses that the distance to the object above is less than 20 cm, the alarm light flashes and the buzzer sounds with a 0.5-second interval. When the ultrasonic radar senses that the distance to the object above is less than 10 cm, the alarm light flashes and the buzzer sounds without interval, and the controller transmits a signal to the proportional solenoid valve, cutting off the boom 3 lifting oil circuit, stopping the boom 3 from rising and falling, and allowing the operator to lower the boom 3. When the ultrasonic radar senses that the distance to the object above is greater than 10 cm, the controller transmits a signal to the proportional solenoid valve, connecting the boom 3 lifting oil circuit, and the operator can then use the excavator normally.

[0029] Example 2: When using this invention, when working under a cable or with heavy attachments, the operator can transmit control signals to the controller via the touchscreen. The operator raises the boom 3 to a certain height, for example, two meters. The angle sensor 4 transmits data to the controller, and the tilt angle of the boom 3 is calibrated via the touchscreen. When the operator operates the excavator and reaches the calibrated angle, the controller transmits a signal to the proportional solenoid valve to cut off the boom 3 lifting oil circuit, and the boom 3 stops lifting. When the operator lowers the boom 3 and it moves away from the calibrated angle, the controller transmits a signal to the proportional solenoid valve to reconnect the boom 3 lifting oil circuit, and the operator can use the excavator normally. After the operation is completed, the operator transmits an electrical signal to the controller via the touchscreen to cancel the calibrated angle, and the excavator can be used normally.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for limiting the lifting height of an excavator boom, comprising an excavator body (1), wherein a main valve is provided inside the excavator body (1), and a control handle is provided inside the cab (2), the control handle being connected to a pilot valve, the pilot valve being connected to the main valve via a boom (3) lifting oil circuit, the cab (2) being provided on the excavator body (1), and a boom (3) being provided on one side of the excavator body (1), wherein a stick (5) is connected to the boom (3), characterized in that: An alarm (21) is installed in the cab (2), an angle sensor (4) is installed on the boom (3), and an extended side plate is installed at the end of the stick (5). There are two side plates, and a distance sensor assembly (6) is installed between the side plates. The distance sensor assembly (6) includes a distance sensor base (61), with connecting shafts (62) on both sides of the distance sensor base (61). The connecting shafts (62) are connected to the side plate through bearings. A distance sensor (63) is provided above the distance sensor base (61), and a counterweight (64) is provided at the bottom of the distance sensor base (61). The boom (3) lifting oil circuit is equipped with a proportional solenoid valve, and the cab (2) is equipped with a controller. The controller is electrically connected to the distance sensor (63), the angle sensor (4), the alarm (21), and the proportional solenoid valve.

2. The device for limiting the lifting height of an excavator boom according to claim 1, characterized in that: The distance sensor (63) is an ultrasonic radar.

3. The device for limiting the lifting height of an excavator boom according to claim 1, characterized in that: The angle sensor (4) is an inertial angle sensor (4).

4. The device for limiting the lifting height of an excavator boom according to claim 1, characterized in that: The alarm (21) includes an alarm light and a buzzer.

5. The device for limiting the lifting height of an excavator boom according to claim 1, characterized in that: The controller is electrically connected to a touch screen.

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