A power-off device for the micro switch of the side door of an electric flatbed truck

Abstract

The present invention proposes a power-off device for a micro switch on the side door of an electric flatbed vehicle, which is installed on the inner side of the vehicle side door, and includes a power-off device and a key switch. The power-off device includes a charging door panel and a lever. The key switch is connected in series with the micro switch. When both are closed at the same time, power is turned on at the hour. The charging door panel opens and closes automatically, and is pressed against the micro switch when closed. The micro switch is used to sense the opening and closing of the charging door panel. The lever cooperates with the pressure plate to lock the charging door panel. A power-off device for a micro switch on the side door of an electric flatbed vehicle does not require a controller. It uses a key switch, an emergency stop button and a side door micro switch to realize a dual switch function. The cooperation between the micro switch, the lever and the pressure plate is used to avoid the occurrence of adhesion during use, effectively saving labor time costs. When the double switch fails, the side door switch can be temporarily powered off in an emergency to improve the safety of the entire vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of forklifts, in particular to a power-off device for a micro switch of a side door of an electric flatbed truck. Background Art

[0002] Forklifts are industrial vehicles that can be used for loading, unloading, stacking and short-distance transportation of goods, which greatly improves work efficiency and reduces the high intensity of manual labor. In an environment where the country advocates energy conservation and emission reduction, the use of electric forklifts is becoming more and more widespread. Therefore, people have certain requirements for the safety of forklift use. The invention mainly includes a micro switch assembly, a side door assembly and a matching wiring harness, which is characterized in that the micro switch is placed on the inner surface of the side panel, and the opening and closing of the side door is used as a condition to trigger the micro switch, so that the circuit of the entire vehicle is directly cut off when the side door is opened for charging, thereby ensuring the personal safety of the operator. The existing technical solution is to trigger a travel switch, and thereby feedback a signal to the controller, and then control the circuit breaker to trip through the controller to achieve automatic power off.

[0003] The existing power-off method is to give a circuit breaker signal through the controller to achieve power off of the entire vehicle. When the controller fails, it cannot send a circuit breaker signal, the controller fails, the circuit breaker fails, and the operator mistakenly thinks that the vehicle is powered off and performs the next operation, which may cause electric shock.

[0004] The "automatic power-off device" disclosed in the Chinese patent literature has a publication number of CN109425119A and a publication date of 2019-03-05. The invention discloses an automatic power-off device, which belongs to the field of electric heater heating. The automatic power-off device includes an isolation wall, a micro switch and a tilt switch. The micro switch and the tilt switch are connected in series in the power circuit of the electric heater in sequence, wherein: the first isolation wall is installed at the outlet of the electric heater through a threaded connection, and the second isolation wall is installed at the inlet of the electric heater through a threaded connection; the first micro switch and the second micro switch are both normally open micro switches, the first micro switch is arranged at the bottom of the inlet pipe, and the second micro switch is arranged at the bottom of the outlet pipe. The present invention ensures that the electric heater is reliably connected to the anti-electric wall by arranging micro switches at the bottom of the inlet pipe and the outlet pipe. At the same time, the tilt switch arranged inside can ensure that the electric heater is in a vertical state, avoiding internal water accumulation due to tilting, which affects the safety of the electric heater. However, its application fields are different, and the specific principle is relatively simple. Summary of the invention

[0005] The present invention solves the problem that the existing power-off method requires the controller to send a circuit breaker signal and the controller cannot send a circuit breaker signal when a fault occurs. A side door microswitch power-off device for an electric flatbed vehicle does not require a controller, and adopts a key switch, an emergency stop button and a side door microswitch to realize a dual switch function. The coordination between the microswitch, the lever and the pressure plate is adopted to avoid the occurrence of adhesion during use, effectively saving labor time costs. When the double switch fails, the side door switch can be temporarily used for emergency power off to improve the safety of the entire vehicle.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a power-off device for the micro switch of the side door of an electric flatbed vehicle, which is installed on the inner side of the side door of the vehicle, comprises a power-off device and a key switch, wherein the power-off device comprises a charging door plate and a lever,

[0007] Key switch: connected in series with the micro switch, when both are closed at the same time, the whole point is powered on;

[0008] Charging door panel: automatically opens and closes, and is pressed tightly against the micro switch when closed;

[0009] Micro switch: used to sense the opening and closing of the charging door panel;

[0010] Latch: Used with the pressure plate to lock the charging door panel.

[0011] In the power-off device of the present invention, the micro switch is normally closed when the vehicle is in normal working state. The micro switch is installed on the micro switch bracket. One end of the micro switch bracket is fixed on the vehicle frame, and a waist-shaped hole is provided on the plane of the other end for installing the switch. When the vehicle is in normal working state, the charging door panel is in a closed state. The lever clamps the pressure plate to lock the door panel, so the entire door panel will not spring outward and open. The micro switch and the charging door panel are in close contact. The ball button on the micro switch contacts the door panel, and the door panel has an inward squeezing force on the ball. After the operator gets off the vehicle to charge, the charging door panel is opened through the side door lock, the lever rotates inward, the lever 7 no longer presses the pressure plate, and the micro switch assembly and the door panel are no longer in a compressed state. At this time, the switch is disconnected. Since the micro switch and the key switch in the power-off device are connected in series, that is, when both are closed at the same time, the whole vehicle is powered on, ensuring the safety and efficiency of the whole vehicle, saving a lot of manpower and material resources.

[0012] Preferably, a pressure plate is provided at one end of the charging door panel located on the inner side of the vehicle side door, the pressure plate and the lever are clamped together, the side of the lever away from the center of the charging door panel is hinged to the inner side of the side door, and the micro switch is installed and fixed on the micro switch bracket.

[0013] In the present invention, the unique structure and matching mode of the pressing plate and the lever, combined with the micro-triggering performance of the micro-switch, can achieve flexible control without the need for a controller, thus avoiding the safety impact caused by damage to the controller.

[0014] Preferably, one end of the strap passes through the charging door plate and is clamped to the end of the charging door plate away from the inner side of the vehicle side door. The outermost surface of the strap located on the vehicle side door is a plane. The plane is provided with a first right-angle groove close to the pressure plate side. The first right-angle groove is clamped with the pressure plate when the charging door plate is closed. The plane starts to become smaller from the outside to the inside along the thickness direction of the charging door plate to the outside of the charging door plate away from the pressure plate side to form an inclined surface. There is an acute angle between the inclined surface and the charging door plate. The inclined surface is provided with a second right-angle groove on one side of the charging door plate. The height of the other end of the strap close to the first right-angle groove is slightly smaller than the height close to the second right-angle groove.

[0015] In the present invention, the structure of the shelf is to adapt to the matching connection between the pressure plate and the charging panel, and two right-angle grooves are provided on the shelf, wherein the purpose of the first right-angle groove is to fix the pressure plate and to ensure that the shelf itself is clamped in the charging panel so that the charging panel will not be turned outward, and the purpose of the second right-angle groove is to cooperate with the effect of the inclined surface to ensure that the charging panel and the shelf can be completely separated when the charging panel is opened and the shelf is turned inward. In addition, the height of the other end of the shelf near the first right-angle groove is slightly smaller than the height near the second right-angle groove, which is also for the purpose of better separation of the charging panel and the shelf.

[0016] Preferably, the structure of the micro switch bracket is stepped, and a first plane is provided at one end of the micro switch bracket away from the center of the charging door panel. The first plane is fixedly connected to the inner side of the vehicle side door. The first plane and the second plane are perpendicular to each other, and the second plane and the third plane are perpendicular to each other. A waist-shaped hole is provided at the center of the third plane and passes through it.

[0017] In the present invention, the bracket of the micro switch is made of an integral sheet metal by bending, and the selected sheet metal thickness can be adjusted according to actual needs. The waist-shaped hole on the third plane is used to install the micro switch. The micro switch can be installed by welding on the inner side of the vehicle side door or by threaded connection.

[0018] Preferably, a mounting shaft of a micro switch is installed in the waist-shaped hole, two threaded aluminum sheets are installed on the mounting shaft of the micro switch, and the micro switch is fixedly connected to the micro switch bracket through the two threaded aluminum sheets.

[0019] In the present invention, two threaded aluminum sheets are installed on the mounting shaft to ensure that the distance between the micro switch and the charging door plate is adjustable, and the distance between the micro switch and the charging door plate is controlled within a reasonable range so that the two are just in close contact when the charging door plate is closed.

[0020] Preferably, a mounting shaft of the micro switch is located on one side of the charging door plate and a ball is mounted thereon, and the ball contacts the charging door plate when the charging door plate is closed.

[0021] In the present invention, the ball moves outward through an effective stroke PT, and the micro switch is closed at this time. The range of PT is 0.6>PT>0. When the operator wants to get off the vehicle to charge, the micro switch opens when the ball moves in the opposite direction, and the triggering is flexible.

[0022] Preferably, the charging door panel is provided with a lever hole, the lever hole is snapped onto the lever, a hinge is also installed at one end of the charging door panel away from the lever, and the charging door panel is slidably connected to the vehicle side door via the hinge.

[0023] In the present invention, the charging door panel is slidably connected to the vehicle side door, and the hinge has a maximum rotation limit angle to prevent the charging door panel from being opened too far.

[0024] Preferably, the length of the right-angled side of the second right-angled groove close to the inclined surface is smaller than the length of the other right-angled side of the second right-angled groove.

[0025] In the present invention, while saving materials to the maximum, interference with other parts is prevented when the lever rotates.

[0026] Preferably, a lever is provided between the mounting axis of the micro switch and the second plane of the micro switch bracket.

[0027] In the present invention, the position of the shelf is uniquely arranged, which saves a lot of space without causing interference.

[0028] Preferably, one end of the key switch is electrically connected to one end of a micro switch, and the other end of the micro switch is also connected to a DC power supply.

[0029] In the present invention, the key switch and the micro switch in the power-off device are in an "or and not" relationship. The conclusion is established only when both conditions are met at the same time. Here, condition 1 is that the key switch is closed, and condition 2 is that the micro switch assembly is closed, and the conclusion is that the whole vehicle is powered on. After opening the charging door panel 3, condition 2 is not met, so the conclusion is not established, the whole vehicle is powered off, and then the side charging operation is performed, avoiding the safety hazards in the process.

[0030] The beneficial effects of the present invention are: a side door microswitch power-off device for an electric flatbed truck does not require a controller, thus avoiding the occurrence of adhesion during use and effectively saving labor time costs; the key switch, emergency stop button and side door microswitch realize a dual switch function. When the double switch fails, the side door switch can be temporarily powered off in an emergency, greatly improving the safety and efficiency of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of a micro switch power-off device for a side door of an electric flatbed vehicle of the present invention;

[0032] Figure 2 It is a structural diagram of another perspective of a micro switch power-off device for a side door of an electric flatbed vehicle of the present invention;

[0033] Figure 3 It is a structural diagram of a micro switch power-off device for a side door of an electric flatbed vehicle of the present invention when the charging door panel is opened;

[0034] Figure 4 It is a structural diagram of a micro switch power-off device for a side door of an electric flatbed vehicle of the present invention when the charging door plate is closed;

[0035] Figure 5 It is a micro switch structure diagram of a micro switch power-off device for a side door of an electric flatbed vehicle of the present invention;

[0036] Figure 6 It is a circuit diagram of a micro switch power-off device for a side door of an electric flatbed vehicle of the present invention;

[0037] In the figure, 1, micro switch assembly 2, micro switch bracket 21, first plane 22, second plane 23, third plane

[0038] 3. Charging door panel 4. Mounting plate 5. Hinge 6. Press plate 7. Bracket 71. First right angle groove 72. Second right angle groove

[0039] 73, inclined plane 8, threaded aluminum sheet 9, ball bearing 10, mounting shaft. DETAILED DESCRIPTION

[0040] Example:

[0041] This embodiment provides a power-off device for the micro switch of the side door of an electric flatbed vehicle. Figure 1 , Figure 2 and Figure 4 A power-off device for a side door micro switch of an electric flatbed vehicle is integrally arranged on the inner side of the vehicle side door, including a power-off device and a key switch. The power-off device includes a charging door plate 3.

[0042] Key switch: connected in series with micro switch 1. The vehicle can be powered on only when the key switch and micro switch 1 are closed at the same time;

[0043] Charging door panel 3: can be opened and closed automatically, and contacts with micro switch 1 when the charging door panel is closed;

[0044] Micro switch 1: The main function of micro switch 1 is to open or close the inductive charging door panel 3;

[0045] Lever 7: Lever 7 and pressure plate 6 cooperate with each other to lock the charging door panel 3.

[0046] refer to Figures 1 to 3, including a charging door panel 3 and a micro switch 1. A pressure plate 6 is arranged on the inner side of the charging door panel 3 near the inner side of the vehicle side door. The pressure plate 6 is clamped on a lever 7. The lever 7 is hinged on the inner side of the side door away from the center of the charging door panel 3. The micro switch 1 is arranged on a micro switch bracket 2, and the micro switch 1 is electrically connected to the key switch.

[0047] refer to Figure 1 and Figure 2 One end of the lever 7 passes through the charging door plate 3 and is clamped with the end of the charging door plate 3 away from the inner side of the vehicle side door. The outermost side of the lever 7 is a plane. The plane is provided with a first right-angle groove 71 near the pressure plate 6. The first right-angle groove 71 is clamped with the pressure plate 6 when the charging door plate 3 is closed. The plane starts to gradually decrease from the outside to the inside along the thickness direction of the charging door plate 3 to the outside of the charging door plate 3 away from the pressure plate 6 to form an inclined surface 73. The inclined surface 73 forms an acute angle with the charging door plate 3. A second right-angle groove 72 is provided near the charging door plate 3. The height of the other end of the lever 7 near the second right-angle groove is greater than the height near the first right-angle groove.

[0048] refer to Figure 2 and Figure 5 The micro switch bracket 2 is in a stepped shape. A first plane 21 is provided on the side of the micro switch bracket 2 away from the center of the charging door plate 3. The first plane 21 is fixedly connected to the inner side of the vehicle side door. The first plane 21 is perpendicular to the second plane 22, and the second plane 22 is perpendicular to the third plane 23. A waist-shaped hole is opened at the center of the third plane 23. A micro switch mounting shaft 10 is provided in the waist-shaped hole. Two threaded aluminum sheets 8 are provided on the mounting shaft 10. The micro switch 1 is fixedly connected to the micro switch bracket 2 through the two threaded aluminum sheets 8. A ball 9 is provided at one end of the mounting shaft 10 of the micro switch 1 close to the charging door plate 3. When the charging door plate 3 is closed, the ball 9 contacts the charging door plate 3.

[0049] refer to Figures 1 to 3 The charging door plate 3 is provided with a latch hole that is mutually engaged with the latch 7. A hinge 4 is provided on the side of the charging door plate 3 away from the latch 7. The charging door plate 3 is slidably connected to the vehicle side door through the hinge 4. The length of the right angle side of the second right angle groove close to the inclined surface needs to be much smaller than the length of the other right angle side of the second right angle groove. The latch 6 is provided between the mounting shaft 10 of the micro switch 1 and the second plane 22 of the micro switch bracket 2.

[0050] refer to Figure 6 One end of the key switch is electrically connected to one end of the micro switch 1, and the other end of the micro switch 1 is also connected to a DC power supply.

[0051] In the power-off device of the present invention, the micro switch is normally closed when the vehicle is in normal working state. The micro switch is installed on the micro switch bracket. One end of the micro switch bracket is fixed on the vehicle frame, and a waist-shaped hole is provided on the plane of the other end for installing the switch. When the vehicle is in normal working state, the charging door panel is in a closed state. The lever clamps the pressure plate to lock the door panel, so the entire door panel will not spring outward and open. The micro switch and the charging door panel are in close contact. The ball button on the micro switch contacts the door panel, and the door panel has an inward squeezing force on the ball. After the operator gets off the vehicle to charge, the charging door panel is opened through the side door lock, the lever rotates inward, the lever 7 no longer presses the pressure plate, and the micro switch assembly and the door panel are no longer in a compressed state. At this time, the switch is disconnected. Since the micro switch and the key switch in the power-off device are connected in series, that is, when both are closed at the same time, the whole vehicle is powered on, ensuring the safety and efficiency of the whole vehicle, saving a lot of manpower and material resources.

[0052] In the present invention, the unique structure and matching mode of the pressing plate and the lever, combined with the micro-triggering performance of the micro-switch, can achieve flexible control without the need for a controller, thus avoiding the safety impact caused by damage to the controller.

[0053] In the present invention, the structure of the shelf is to adapt to the matching connection between the pressure plate and the charging panel, and two right-angle grooves are provided on the shelf, wherein the purpose of the first right-angle groove is to fix the pressure plate and to ensure that the shelf itself is clamped in the charging panel so that the charging panel will not be turned outward, and the purpose of the second right-angle groove is to cooperate with the effect of the inclined surface to ensure that the charging panel and the shelf can be completely separated when the charging panel is opened and the shelf is turned inward. In addition, the height of the other end of the shelf near the first right-angle groove is slightly smaller than the height near the second right-angle groove, which is also for the purpose of better separation of the charging panel and the shelf.

[0054] In the present invention, the bracket of the micro switch is made of an integral sheet metal by bending, and the selected sheet metal thickness can be adjusted according to actual needs. The waist-shaped hole on the third plane is used to install the micro switch. The micro switch can be installed by welding on the inner side of the vehicle side door or by threaded connection.

[0055] In the present invention, two threaded aluminum sheets are installed on the mounting shaft to ensure that the distance between the micro switch and the charging door plate is adjustable, and the distance between the micro switch and the charging door plate is controlled within a reasonable range so that the two are just in close contact when the charging door plate is closed.

[0056] In the present invention, the ball moves outward through an effective stroke PT, and the micro switch is closed at this time. The range of PT is 0.6>PT>0. When the operator wants to get off the vehicle to charge, the micro switch opens when the ball moves in the opposite direction, and the triggering is flexible.

[0057] In the present invention, the charging door panel is slidably connected to the vehicle side door, and the hinge has a maximum rotation limit angle to prevent the charging door panel from being opened too far.

[0058] In the present invention, while saving materials to the maximum, interference with other parts is prevented when the lever rotates.

[0059] In the present invention, the position of the shelf is uniquely arranged, which saves a lot of space without causing interference.

[0060] In the present invention, the key switch and the micro switch in the power-off device are in an "or and not" relationship. The conclusion is established only when both conditions are met at the same time. Here, condition 1 is that the key switch is closed, and condition 2 is that the micro switch assembly is closed, and the conclusion is that the whole vehicle is powered on. After opening the charging door panel 3, condition 2 is not met, so the conclusion is not established, the whole vehicle is powered off, and then the side charging operation is performed, avoiding the safety hazards in the process.

[0061] refer to Figure 1-Figure 4 The working process of the present invention is specifically as follows: when the vehicle is in normal working state, the entire power-off device is installed on the inner surface of the side door, the charging door panel 3 is in a closed state, the lever 7 clamps the pressure plate 6 to lock the charging door panel 3, so the entire door panel will not bounce outward, the micro switch 1 and the charging door panel 3 are in close contact, the ball button on the micro switch 1 contacts the charging door panel 3, the charging door panel 3 gives the ball an inward squeezing force, and the ball passes an effective stroke PT, then the micro switch 1 is closed. When the operator wants to get off the vehicle to charge, the charging door panel 3 is opened through the side door lock, and the lever 7 rotates inward along the hinge. At this time, the lever 7 is no longer clamped on the pressure plate 6, and the micro switch 1 and the charging door panel 3 are no longer in a clamped state, and the switch is disconnected. Because the micro switch assembly on the vehicle wiring harness is connected in series behind the key switch, the two are in an or and not "and" relationship, and the conclusion is established only when the two conditions are met at the same time. Here, condition 1 is that the key switch is closed, and condition 2 is that the micro switch assembly is closed, and the conclusion is that the vehicle is powered on. After opening the charging door panel 3, condition 2 is not met, so the conclusion is not established. The whole vehicle is powered off and then the side charging operation is performed, avoiding the safety hazards in the process.

[0062] The above embodiments are further elaborations and illustrations of the present invention for ease of understanding, and are not limitations of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro switch power-off device for the side door of an electric flatbed vehicle, installed on the inner side of the vehicle side door, characterized in that: The power-off device comprises a micro switch (1), a key switch, a charging door plate (3) and a lever (7). Key switch: connected in series with the micro switch (1). When both are closed at the same time, the vehicle is powered on. Charging door panel (3): automatically opens and closes, and is pressed against the micro switch (1) when closed; Micro switch (1): used to sense the opening and closing of the charging door panel (3); The lever (7) cooperates with the pressing plate (6) to lock the charging door plate (3); A ball (9) is arranged at one end of the mounting shaft (10) of the micro switch (1) close to the charging door plate (3); when the charging door plate (3) is closed, the ball (9) contacts the charging door plate (3).

2. The electric flatbed vehicle side door micro switch power-off device according to claim 1, characterized in that: A pressure plate (6) is provided at one end of the charging door plate (3) located on the inner side of the vehicle side door, the pressure plate (6) and the bracket (7) are mutually clamped, the side of the bracket (7) away from the center of the charging door plate (3) is hinged to the inner side of the side door, and the micro switch is installed and fixed on the micro switch bracket (2).

3. The electric flatbed vehicle side door micro switch power-off device according to claim 1, characterized in that: One end of the lever (7) passes through the charging door plate (3) and is clamped to the end of the charging door plate (3) away from the inner side of the vehicle side door. The outermost surface of the lever (7) located at the vehicle side door is a plane. The plane is provided with a first right-angle groove (71) close to the pressure plate (6). The first right-angle groove (71) is clamped to the pressure plate (6) when the charging door plate (3) is closed. The plane starts to gradually decrease from the outside to the inside along the thickness direction of the charging door plate (3) to the outside of the charging door plate (3) to form an inclined surface (73). The inclined surface and the charging door plate (3) form an acute angle. The inclined surface (73) is provided with a second right-angle groove (72) on one side of the charging door plate (3). The height of the other end of the lever (7) close to the first right-angle groove is slightly smaller than the height close to the second right-angle groove.

4. The electric flatbed vehicle side door micro switch power-off device according to claim 1, characterized in that: The structure of the micro switch bracket (2) is in a stepped shape. A first plane (21) is provided at one end of the micro switch bracket (2) which is located away from the center of the charging door plate (3). The first plane (21) is fixedly connected to the inner side of the vehicle side door. The first plane (21) and the second plane (22) are perpendicular to each other. The second plane (22) and the third plane (23) are perpendicular to each other. A waist-shaped hole is provided at the center of the third plane (23) and passes through it.

5. The electric flatbed vehicle side door micro switch power-off device according to claim 4, characterized in that: A micro switch mounting shaft (10) is installed in the waist-shaped hole, two threaded aluminum sheets (8) are installed on the micro switch mounting shaft (10), and the micro switch (1) is fixedly connected to the micro switch bracket (2) via the two threaded aluminum sheets (8).

6. The electric flatbed vehicle side door micro switch power-off device according to claim 1, characterized in that: The charging door plate (3) is provided with a latch hole, the latch hole is snap-connected to the latch (7), a hinge (4) is also installed at one end of the charging door plate (3) away from the latch (7), and the charging door plate (3) is slidably connected to the vehicle side door via the hinge (4).

7. The electric flatbed vehicle side door micro switch power-off device according to claim 3, characterized in that: The length of the right-angled side of the second right-angled groove close to the inclined surface is smaller than the length of the other right-angled side of the second right-angled groove.

8. The electric flatbed vehicle side door micro switch power-off device according to claim 1, characterized in that: A lever (7) is provided between the mounting axis (10) of the micro switch (1) and the second plane (22) of the micro switch bracket (2).

9. The electric flatbed vehicle side door micro switch power-off device according to claim 1, characterized in that: One end of the key switch is electrically connected to one end of the micro switch (1), and the other end of the micro switch (1) is also connected to a direct current power supply.

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