Forklift portal frame lifting height superelevation prompting and alarming control structure

Abstract

The technical scheme of the utility model discloses a forklift gantry lifting height superelevation prompting and alarming control structure, which comprises a proximity switch connected to the fixed end of a gantry and a detection device mounted at the movable end of the gantry, and is characterized by further comprising a vehicle control unit, a 80V battery, a DC-DC converter and a second fuse, the vehicle control unit judges whether the lifting height of the portal frame is too high or not according to the distance between the proximity switch and the detection device in the lifting process of the portal frame and controls the buzzer alarm to work or not. The prompt alarm control structure is simple in structure, convenient to operate, rapid in feedback and capable of effectively achieving alarm work when the portal frame is over high, and improves safety of a forklift in the working process.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift electrical control, in particular to an ultra-high lift height prompt and alarm control structure for a forklift mast. Background Technique

[0002] With the continuous development of society, forklifts, as transportation tools for moving goods, have been widely used. During the use of forklifts, the driver's line of sight is restricted when the mast is lifted, and there is combined operation of forklifts. Therefore, its operation safety has been widely concerned by people. Therefore, in order to improve the safety during the use of forklifts, the function of prompting and alarming when the vehicle moves when the mast is lifted to a specific height has been widely applied. When the mast is lifted to a certain height, when the forklift moves forward or backward, the buzzer sounds to remind the driver and surrounding people of the working state of the forklift and avoid accidents. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to realize the buzzer alarm when the forklift mast is lifted and exceeds a specific height during the lifting process of the forklift mast.

[0004] To solve the above technical problem, the technical solution of the utility model provides an ultra-high lift height prompt and alarm control structure for a forklift mast, including a proximity switch connected to the fixed end of the mast and a detection device installed at the movable end of the mast. Among them, it further includes:

[0005] A vehicle controller, whose first pin is connected to one end of the proximity switch;

[0006] An 80V battery, one end of which is connected to the vehicle controller, and the other end is connected to a direction switch through a first fuse, a vehicle emergency stop switch, and a vehicle key switch. The direction switch is connected to the third pin and the fourth pin of the vehicle controller;

[0007] A DC-DC converter, whose input end is connected to the 80V battery;

[0008] A second fuse, whose two ends are respectively connected to the output end of the DC-DC converter, the other end of the proximity switch, one end of a buzzer alarm, and one end of a 12V relay; the other end of the 12V relay is connected to the second pin of the vehicle controller, and the other end of the buzzer alarm is connected to the DC-DC converter. Among them

[0009] The vehicle controller judges whether the mast is lifted too high by the distance between the proximity switch and the detection device during the mast lifting process, and controls whether the buzzer alarm works.

[0010] Optionally, the DC-DC converter converts the 80V high voltage of the 80V battery into 12V low voltage to provide operating power for the proximity switch, the 12V relay, and the buzzer alarm.

[0011] Optionally, the contacts of the 12V relay are connected to the buzzer alarm.

[0012] Optionally, the proximity switch is connected to the fixed end of the gantry through a mounting bracket.

[0013] Optionally, the proximity switch is a PNP normally closed proximity switch with a maximum sensing distance of 5mm.

[0014] Optionally, the enable terminal of the DC-DC converter is connected to the direction switch.

[0015] Optionally, the vehicle controller controls whether the 12V relay works by judging the signals sent by the direction switch and the proximity switch.

[0016] Optionally, when the gantry is not over-height, the proximity switch is disconnected, the voltage between the vehicle controller and the 12V relay is normal, and the buzzer alarm does not work.

[0017] Optionally, when the gantry is over-height, the proximity switch is closed and the buzzer alarm works.

[0018] Optionally, the voltage between the vehicle controller and the 12V relay is 0V, the 12V relay works due to the voltage difference at both ends, and the buzzer alarm is powered on and sounds an alarm after being connected to the second fuse.

[0019] The beneficial effects of the technical solution of the present utility model are as follows:

[0020] In the prompt alarm control structure of the present utility model, the 80V battery is used to provide electrical energy for the vehicle operation; the DC-DC converter can convert the high voltage of the 80V battery system into 12V voltage to provide operating power for the proximity switch, the 12V relay, and the buzzer alarm; the proximity switch is used to judge whether the gantry is at a specific height; the controller controls the vehicle operation logic to make the buzzer alarm work under specific conditions. The prompt alarm control structure of the present utility model has a simple structure, convenient operation, and rapid feedback, can effectively realize the alarm work when the gantry is over-height, and improves the safety of the forklift during operation. Description of the Drawings

[0021] Figure 1 It is a schematic installation diagram of the proximity switch on the forklift in the embodiment of the present utility model;

[0022] Figure 2This is the circuit structure diagram of the ultra-high prompt alarm control structure in the embodiment of the present utility model;

[0023] Figure 3 is Figure 1 a partial enlarged view. Specific embodiments

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise specifically defined.

[0027] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, a fork lift mast lifting height ultra-high prompt alarm control structure of an embodiment is shown, which includes a proximity switch 5 connected to the fixed end of the mast and a detection device 13 installed at the movable end of the mast. Among them, a vehicle controller 3 is further included, and its first pin A is connected to one end of the proximity switch 5; an 80V battery 9, one end of which is connected to the vehicle controller 3, and the other end is connected to a direction switch 6 through a first fuse 1, a vehicle emergency stop switch 8, and a vehicle key switch 7. The direction switch 6 is connected to the third pin C and the fourth pin D of the vehicle controller 3; a DC-DC converter 10, whose input end is connected to the 80V battery 9; a second fuse 2, both ends of which are respectively connected to the output end of the DC-DC converter 10, the other end of the proximity switch 5, one end of a buzzer alarm 11, and one end of a 12V relay 4; the other end of the 12V relay 4 is connected to the second pin B of the vehicle controller 3, and the other end of the buzzer alarm 11 is connected to the DC-DC converter 10; wherein the vehicle controller 3 judges whether the mast lifting is ultra-high through the distance between the proximity switch 5 and the detection device 13 during the mast lifting process, and controls whether the buzzer alarm 11 works.

[0030] In this embodiment, the DC-DC converter 10 converts the 80V high voltage of the 80V battery 9 into 12V low voltage to provide working power for the proximity switch 5, the 12V relay 4, and the buzzer alarm 11, and the contacts of the 12V relay 4 are connected to the buzzer alarm 11.

[0031] In this embodiment, the proximity switch 5 is connected to the fixed end of the mast through a mounting bracket 12. The proximity switch 5 is a PNP normally closed proximity switch, and its maximum sensing distance is 5mm. The enable end of the DC-DC converter 10 is connected to the direction switch 6.

[0032] In this embodiment, the vehicle controller 3 controls whether the 12V relay 4 works by judging the signals sent by the direction switch 6 and the proximity switch 5; when the mast is not over-height, the proximity switch 5 is disconnected, the voltage between the vehicle controller 3 and the 12V relay 4 is normal, and the buzzer alarm 11 does not work; when the mast is over-height, the proximity switch 5 is closed, and the buzzer alarm 11 works; the voltage between the vehicle controller 3 and the 12V relay 4 is 0V, a voltage difference appears across the two ends of the 12V relay 4 and it works, and the buzzer alarm 11 is connected to the second fuse 2 and gets powered to sound the alarm.

[0033] Further understand the characteristics and functions of the present utility model through the following description.

[0034] Please refer to Figure 1 and Figure 2 As shown, a control method for a vehicle walking prompt alarm when the mast lifts over a specific height in an embodiment of the present utility model includes a vehicle controller 3, a proximity switch 5, a DC-DC converter 10, an 80V battery 9, a 12V relay 4, a vehicle key switch 7, a vehicle emergency stop switch 8, a direction switch 6, a buzzer alarm 11, a fuse 1, a fuse 2, a mounting bracket 12 and a detection device 13.

[0035] One end of the 80V battery 9 is connected to the vehicle controller 3, and the other end is connected to the direction switch 6 through the fuse 1, the vehicle emergency stop switch 8 and the vehicle key switch 7. One end of the DC-DC converter 10 is connected to the 80V battery 9, and the other end is connected to the fuse 2; the proximity switch 5 and the buzzer alarm 11 are respectively connected to the vehicle controller 3 and the DC-DC converter 10.

[0036] The working principle of the over-height prompt alarm control structure in the embodiment of the present utility model is as follows:

[0037] After the vehicle emergency stop switch 8 and the vehicle key switch 7 are closed, after the DC-DC converter 10 receives the enable signal provided by the 80V battery 9, it converts the 80V voltage of the 80V battery 9 into a 12V power supply.

[0038] When the mast lifts without exceeding the specific height, the proximity switch 5 with the PNP normally closed specification fixed on the mast through the mounting bracket 12 is within 5mm of the detection device 13, the proximity switch 5 is in the triggered state, the switch is disconnected, and the +12V signal does not enter the vehicle controller 3. The vehicle controller 3 keeps the B pin floating or at +12V voltage;

[0039] When the mast is lifted beyond a specific height, the proximity switch 5 fails to detect the detection device 13, the switch closes, and the +12V signal enters the vehicle controller 3. When the direction switch 6 is closed, there is a +80V voltage at the C or D pin of the vehicle controller 3. At this time, the B pin of the vehicle controller 3 becomes 0V, creating a 12V voltage difference across the 12V relay. The 12V relay operates, and the buzzer alarm 11 is connected to the fuse 2. The buzzer alarm 11 is powered on and starts sounding the alarm.

[0040] In summary, in the prompt alarm control structure of the present utility model, the 80V battery is used to provide electrical energy for the vehicle operation; the DC-DC converter can convert the high voltage of the 80V battery system into 12V voltage to provide working power for the proximity switch, the 12V relay, and the buzzer alarm; the proximity switch is used to determine whether the mast is at a specific height; the controller controls the vehicle operation logic to enable the buzzer alarm to operate under specific conditions. The prompt alarm control structure of the present utility model is simple in structure, convenient to operate, and rapid in feedback, and can effectively implement the alarm work when the mast is too high, improving the safety of the forklift during operation.

[0041] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model accordingly. For those skilled in the art, it should be able to realize that any equivalent replacement and obvious changes made by using the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A forklift gantry lifting height over-height warning alarm control structure, comprising a proximity switch connected to the fixed end of the gantry and a detection device installed at the movable end of the gantry, characterized in that: Also includes: A vehicle controller, a first pin of which is connected to one end of the proximity switch; An 80V battery, one end of which is connected to the vehicle controller, and the other end is connected to the direction switch through the first fuse, the vehicle emergency stop switch and the vehicle key switch, and the direction switch is connected to the third pin and the fourth pin of the vehicle controller; A DC-DC converter, an input end of which is connected to the 80V battery; A second fuse, two ends of which are respectively connected to the output end of the DC-DC converter and the other end of the proximity switch, one end of the buzzer alarm and one end of the 12V relay; the other end of the 12V relay is connected to the second pin of the vehicle controller, and the other end of the buzzer alarm is connected to the DC-DC converter; in The vehicle controller determines whether the mast is lifted too high by the distance between the proximity switch and the detection device during mast lifting, and controls whether the buzzer alarm works.

2. The forklift mast lifting height over-height warning alarm control structure according to claim 1 is characterized in that: The DC-DC converter converts the 80V high voltage of the 80V battery into a 12V low voltage to provide working power to the proximity switch, the 12V relay and the buzzer alarm.

3. The forklift mast lifting height over-height warning alarm control structure according to claim 2 is characterized in that: The contact of the 12V relay is connected to the buzzer alarm.

4. The forklift gantry lifting height over-height warning alarm control structure according to claim 3 is characterized in that: The proximity switch is connected to the fixed end of the door frame through a mounting bracket.

5. The forklift gantry lifting height over-height warning alarm control structure according to claim 4 is characterized in that: The proximity switch is a PNP normally closed proximity switch, and its maximum sensing distance is 5mm.

6. The forklift gantry lifting height over-height warning alarm control structure according to claim 5 is characterized in that: An enable terminal of the DC-DC converter is connected to the direction switch.

7. The forklift mast lifting height over-height warning alarm control structure according to claim 6 is characterized in that: The vehicle controller controls whether the 12V relay is working by judging the signals sent by the direction switch and the proximity switch.

8. The forklift mast lifting height over-height warning alarm control structure according to claim 7 is characterized in that: When the gantry is not overheight, the proximity switch is disconnected, the voltage between the vehicle controller and the 12V relay is normal, and the buzzer alarm does not work.

9. The forklift mast lifting height over-height warning alarm control structure according to claim 8 is characterized in that: When the gantry is over-height, the proximity switch is closed and the buzzer alarm is activated.

10. The forklift mast lifting height over-alert alarm control structure according to claim 9, characterized in that: There is 0 voltage between the vehicle controller and the 12V relay, and a voltage difference appears at both ends of the 12V relay to work. The buzzer alarm is connected to the second fuse to obtain power and sound an alarm.

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