Movable lifting working platform with two sections of telescopic arms and anti-tipping system

Abstract

The utility model discloses a movable lifting working platform with two sections of telescopic arms and an anti-tipping system. The system comprises a controller as well as an angle sensor, a first-section arm stretching in-place detection switch, a first-section arm amplitude detection switch, a first-section arm falling in-place detection switch, a long angle sensor, a second-section arm stretching in-place detection switch, a second-section arm amplitude detection switch and a second-section arm falling in-place detection switch which are electrically connected with the controller respectively. The safety of operation of the movable lifting working platform with the two telescopic arms can be improved, and the movable lifting working platform with the two telescopic arms is prevented from tipping over.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile lifting work platforms, in particular to a mobile lifting work platform with two-section telescopic arms and an anti-tilting system. Background Art

[0002] With the rapid development of society and the further strengthening of the country's requirements for safe construction, the demand for mobile lifting work platforms has further increased, resulting in a rapid increase in mobile lifting work platform manufacturers, and the types of mobile lifting work platforms are becoming more and more diverse. At present, mobile lifting work platforms are mainly divided into scissor-type, straight-arm type and curved-arm type. The two-section retractable-arm mobile lifting work platform is a type of curved-arm mobile lifting work platform. It is currently mainly used in the petrochemical industry, mainly used in work scenes with limited space and high height requirements. Unlike ordinary curved-arm mobile lifting work platforms, the first section of the two-section retractable-arm mobile lifting work platform is also a retractable arm, so it is more flexible at work, but at the same time, if the operator manually operates the boarding action and the extension length / lifting angle of the first section arm or the second section arm exceeds the limit due to improper operation, it will cause the work platform to tip over. Summary of the invention

[0003] The utility model aims to overcome the deficiencies in the prior art and to provide a mobile lifting work platform with two-section retractable arms and an anti-tipping system to solve the problem of the work platform tipping over due to improper operation when the mobile lifting work platform with two-section retractable arms is manually operated to get on board.

[0004] In order to achieve the above object, the utility model is implemented by adopting the following scheme:

[0005] The utility model provides an anti-tilt system for a mobile lifting work platform with two telescopic arms, comprising a controller and an angle sensor electrically connected to the controller, a first arm telescopic position detection switch, a first arm amplitude detection switch, a first arm drop position detection switch, a long angle sensor, a second arm telescopic position detection switch, a second arm amplitude detection switch, and a second arm drop position detection switch; the first arm telescopic position detection switch and the second arm telescopic position detection switch are respectively mounted on the telescopic arms inside the first arm and the second arm, the first arm amplitude detection switch, the first arm drop position detection switch and the angle sensor are mounted at the end of the first arm, and the second arm amplitude detection switch, the second arm drop position detection switch and the long angle sensor are mounted at the end of the second arm.

[0006] Furthermore, the first boom extension and retraction detection switch is a proximity switch.

[0007] Furthermore, the second boom extension and retraction detection switch is a proximity switch.

[0008] Furthermore, the first boom amplitude detection switch is a tilt sensor.

[0009] Furthermore, the second boom amplitude detection switch is a tilt sensor.

[0010] Furthermore, the first boom drop-in-place detection switch is a proximity switch.

[0011] Furthermore, the second boom drop-in-place detection switch is a proximity switch.

[0012] Furthermore, the controller is a programmable logic controller.

[0013] The utility model also provides a mobile lifting work platform with two-section telescopic arms, wherein the mobile lifting work platform with two-section telescopic arms is equipped with the aforementioned anti-tilt system of the mobile lifting work platform with two-section telescopic arms.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model measures a variety of data about the action states of the two arms through the controller on the first arm telescopic position detection switch, the first arm amplitude detection switch, the first arm fall position detection switch, the second arm telescopic position detection switch, the second arm amplitude detection switch and the second arm fall position detection switch, and compares them with the data simultaneously measured by the angle sensor and the long angle sensor, so as to accurately detect whether the first arm and the second arm are extended or retracted to the limit position, whether the amplitude is changed to the set angle and whether they fall to the limit position, provide a basis for whether the first arm / second arm needs to limit the action, improve the safety of the mobile lifting work platform with two-section retractable arms, and prevent the mobile lifting work platform with two-section retractable arms from tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an anti-tilt system of a mobile lifting work platform with two retractable arms provided by an embodiment of the utility model;

[0016] Figure 2 It is a partial enlarged schematic diagram of a mobile lifting work platform with two-section telescopic arms provided by an embodiment of the utility model, in which an anti-tilt system is arranged at the end of the second section of the arm;

[0017] Figure 3 It is a partial enlarged schematic diagram of a mobile lifting work platform with two telescopic arms provided by an embodiment of the utility model, in which an anti-tilt system is arranged at the end of the first arm;

[0018] In the figure: 1. curved arm; 2. platform angle sensor; 3. second arm; 4. second arm extension and retraction detection switch; 5. second arm lifting and lowering cylinder; 6. long angle sensor; 7. second arm drop detection switch; 8. second arm telescopic arm wire rope pulling device; 9. second arm amplitude detection switch; 10. first arm; 11. first arm extension and retraction detection switch; 12. first arm telescopic arm wire rope pulling device; 13. angle sensor; 14. first arm drop detection switch; 15. first arm amplitude detection switch. DETAILED DESCRIPTION

[0019] The following is a further description of the specific implementation of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Embodiment 1:

[0022] The present embodiment provides a mobile lifting work platform anti-rollover system with two-section retractable arms, which comprises a programmable logic controller and an angle sensor 13, a first arm telescopic position detection switch 11, a first arm amplitude detection switch 15, a first arm fall position detection switch 14, a long angle sensor 6, a second arm telescopic position detection switch 4, a second arm amplitude detection switch 9, and a second arm fall position detection switch 7, respectively electrically connected to the programmable logic controller. The mobile lifting work platform anti-rollover system with two-section retractable arms controls the first arm telescopic position detection switch 11, the first arm amplitude detection switch 15, The first boom in place detection switch 14, the second boom extended in place detection switch 4, the second boom amplitude detection switch 9 and the second boom in place detection switch 7 measure a variety of data about the action status of the two booms and compare them with the data measured simultaneously by the angle sensor 13 and the long angle sensor 6, so as to accurately detect whether the first boom and the second boom are extended or retracted to the limit position, whether the amplitude is changed to the set angle and whether they fall to the limit position, so as to provide a basis for whether the first boom 10 / second boom 3 needs to limit the action, thereby improving the safety of the operation of the mobile lifting work platform with two-section retractable arms from the source and preventing the mobile lifting work platform with two-section retractable arms from tipping over.

[0023] Specifically, Figures 1 to 3As shown: the left end of the crank arm 1 is connected to the working platform (not shown) through a pin shaft, and the right end is connected to the second boom 3 through a pin shaft. The platform angle sensor 2 is a sensor for detecting the front and rear tilt angle of the working platform, which is a single-axis angle sensor. The left end of the second boom 3 is connected to the crank arm 1 in a hinged manner, and the right end is connected to the first boom 10 through a pin shaft. The second boom telescopic detection switch 4 is a NBB4-12GM50-E2-V1 type proximity switch, which is installed on the telescopic arm inside the second boom 3. It moves with the telescopic arm and realizes the detection of extension and retraction at the same time, that is, whether the second boom 3 is extended or retracted to the limit position, saving costs. The extension and retraction of the second boom lifting and lowering cylinder 5 is used to adjust the amplitude of the second boom 3. The long angle sensor 6 is a CEF7003-2-6-IR type long angle sensor, which is installed at the end of the second boom 3 to detect the length (extended amount) and amplitude of the second boom 3. The second boom drop detection switch 7 is a NBB4-12GM50-E2-V1 type proximity switch, installed at the end of the second boom 3, to detect whether the second boom 3 has fallen to the limit position. The second boom telescopic arm wire rope pulling device 8 can pull the second boom 3 internal telescopic arm to extend or retract: when the second boom telescopic arm wire rope pulling device 8 rotates counterclockwise, the telescopic arm of the second boom 3 extends, and when the wire rope device rotates clockwise, the telescopic arm of the second boom 3 retracts. The second boom amplitude detection switch 9 is a YWXZT11 type tilt sensor, installed at the end of the second boom 3, to detect the amplitude of the second boom 3. The left end of the first boom 10 is connected to the slewing platform (not shown) by a hinge, and the right end is connected to the second boom 3 by a hinge. The first boom extension detection switch 11 is a NBB4-12GM50-E2-V1 type proximity switch, which is installed on the telescopic arm inside the first boom 10. It moves with the telescopic arm and realizes the detection of extension and retraction at the same time, that is, whether the first boom 10 is extended or retracted to the limit position, saving costs. The first boom telescopic arm wire rope pulling device 12 can pull the telescopic arm inside the first boom 10 to extend or retract: when the first boom telescopic arm wire rope pulling device 12 rotates counterclockwise, the telescopic arm of the first boom 10 extends, and when the wire rope device rotates clockwise, the telescopic arm of the first boom 10 retracts. The angle sensor 13 is a YWSTT20 type angle sensor, which is installed at the end of the first boom 10 to detect the amplitude of the first boom 10. The first boom drop detection switch 14 is a NBB4-12GM50-E2-V1 type proximity switch, which is installed at the end of the first boom 10 to detect whether the first boom 10 falls to the limit position. The first boom amplitude detection switch 15 is a YWXZT11 type inclination sensor, which is installed at the end of the first boom 10 to detect the amplitude of the first boom 10 .

[0024] Working principle:

[0025] When the first boom extension / retraction detection switch 11 is triggered, it is determined that the first boom 10 has been extended / retracted to the limit position. When the second boom extension / retraction detection switch 4 is triggered and the detection length of the long angle sensor 6 is greater than 5 meters, it is determined that the second boom 3 has been extended to the limit position. When the second boom extension and retraction detection switch 4 is triggered and the detection length of the long angle sensor 6 is less than 0.5 meters, it is determined that the second boom 3 has been retracted to the limit position. In addition, after the first boom 10 or the second boom 3 is extended, its telescopic arm is restricted from further extension, but the telescopic arm can be retracted. After the first boom 10 or the second boom 3 is retracted, the telescopic arm is restricted from further retraction, but the telescopic arm can be extended.

[0026] When the first boom amplitude detection switch 15 and the angle sensor 13 both detect that the amplitude of the first boom 10 reaches θ2, it is determined that the first boom 10 has changed its amplitude to θ2; if the first boom amplitude detection switch 15 or the angle sensor 13 detects that the amplitude of the first boom 10 reaches θ2, it is determined that the amplitude change of the first boom 10 is abnormal, and the movement of the first boom 10 is restricted until it is restored to normal through maintenance or other means, and the movement of the first boom 10 is restored. When the second boom amplitude detection switch 9 and the long angle sensor 6 both detect that the amplitude of the second boom 3 reaches θ1, it is determined that the second boom 3 has changed its amplitude to θ1; if the second boom amplitude detection switch 9 or the long angle sensor 6 detects that the amplitude of the first boom 10 reaches θ1, it is determined that the amplitude change of the second boom 3 is abnormal, and the movement of the second boom 3 is restricted until it is restored to normal through maintenance or other means, and the movement of the second boom 3 is restored.

[0027] When the angle sensor 13 measures that the angle of the first boom 10 is 0° or the first boom landing detection switch 14 is triggered, it is determined that the first boom 10 has landed in place, and the first boom 10 is restricted from falling further. When the long angle sensor 6 measures that the angle of the second boom 3 is 0° or the second boom landing detection switch 7 is triggered, it is determined that the second boom 3 has landed in place, and the second boom 3 is restricted from falling further.

[0028] It should be noted that the programmable logic controller detects various data on the action states of the two arms by measuring the first arm extension and retraction detection switch 11, the first arm amplitude detection switch 15, the first arm drop detection switch 14, the second arm extension and retraction detection switch 4, the second arm amplitude detection switch 9 and the second arm drop detection switch 7, and compares the data measured by the angle sensor 13 and the long angle sensor 6 at the same time, which belongs to conventional data detection and discrimination. The above-mentioned first arm 10 / second arm 3 after extension / retraction limit, amplitude change limit maintenance and drop limit are all existing technologies, so they are not described in detail. Embodiment 2:

[0029] This embodiment provides a mobile lifting work platform with two-section retractable arms. The mobile lifting work platform with two-section retractable arms is equipped with the anti-tilt system for the mobile lifting work platform with two-section retractable arms described in the first embodiment.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A mobile lifting work platform anti-tilt system with two-section retractable arms, characterized in that: The invention comprises a controller and an angle sensor electrically connected to the controller, a first arm telescopic position detection switch, a first arm amplitude detection switch, a first arm drop position detection switch, a long angle sensor, a second arm telescopic position detection switch, a second arm amplitude detection switch, and a second arm drop position detection switch; the first arm telescopic position detection switch and the second arm telescopic position detection switch are respectively mounted on the telescopic arms inside the first arm and the second arm, the first arm amplitude detection switch, the first arm drop position detection switch and the angle sensor are mounted at the end of the first arm, and the second arm amplitude detection switch, the second arm drop position detection switch and the long angle sensor are mounted at the end of the second arm.

2. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The first arm extension detection switch is a proximity switch.

3. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The second arm extension detection switch is a proximity switch.

4. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The first boom amplitude detection switch is a tilt sensor.

5. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The second boom amplitude detection switch is a tilt sensor.

6. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The first arm landing detection switch is a proximity switch.

7. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The second arm landing detection switch is a proximity switch.

8. The anti-tilt system for a mobile lifting work platform with two-section retractable arms according to claim 1, characterized in that: The controller is a programmable logic controller.

9. A mobile lifting work platform with two-section retractable arms, characterized in that: The mobile lifting work platform with two-section retractable arms is equipped with the anti-tilt system for the mobile lifting work platform with two-section retractable arms as claimed in any one of claims 1 to 8.

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