Electric control protection type two-stage step boarding ladder for vehicle and using method

Abstract

The application discloses a kind of electric control protective type vehicle double-stage step boarding ladder and use method, double-stage step boarding ladder includes: first step assembly and second step assembly, the two sides of the first step assembly are fixedly connected with first step fixed assembly and second step fixed assembly respectively by limiting hinge seat and hinge mounting frame assembly, the two sides of the second step assembly are fixedly connected with first step fixed assembly and second step fixed assembly respectively by first pin shaft, the two sides of the first step assembly and second step assembly are fixedly connected with connecting plate by second pin shaft;The present electric control protective type vehicle double-stage step boarding ladder is set by first step assembly and second step assembly respectively, so that the extension of double-stage step can be controlled during vehicle running, so that combat personnel can independently use boarding ladder as a tactical platform, thereby meeting the use requirements of diversified combat of troops, and the comfort of multiple people when boarding is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive step technology, specifically to an electrically controlled, protective, double-step vehicle ladder and its usage method. Background Technology

[0002] As is well known, existing protective vehicles are often equipped with ordinary mechanical single-step boarding stairs. Due to the high ground clearance of the floor of medium-sized high-mobility chassis, the use of single-step boarding stairs cannot meet the comfort requirements of various groups of people when boarding the vehicle. Therefore, we propose an electrically controlled double-step boarding stairs for protective vehicles.

[0003] The information disclosed in the background section is only for enhancing the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an electrically controlled, protective, double-step vehicle ladder and its usage method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An electrically controlled protective double-step vehicle boarding ladder includes: a first-stage step assembly and a second-stage step assembly. A first-stage step fixing assembly and a second-stage step fixing assembly are respectively fixedly connected to both sides of the first-stage step assembly via limiting hinge seats and hinge mounting bracket assemblies. Both sides of the second-stage step assembly are fixedly connected to the first-stage step fixing assembly and the second-stage step fixing assembly via first pins. Connecting plates are fixedly connected to both sides of the first-stage step assembly and the second-stage step assembly via second pins. A motor mounting bracket is fixedly installed at the bottom of the first-stage step fixing assembly. A worm gear reducer motor is fixedly installed on the motor mounting bracket. The output shaft of the worm gear reducer motor is fixedly connected to the first-stage step assembly via a second coupling and a first coupling.

[0006] Preferably, the first step fixing assembly is fixedly connected to the external vehicle body.

[0007] Preferably, the second step fixing assembly is fixedly connected to the external vehicle body.

[0008] Preferably, a first limit switch is fixedly installed on the limiting hinge seat.

[0009] Preferably, a second limit switch is fixedly installed on the limiting hinge seat.

[0010] A method for using an electrically controlled, protective, double-step vehicle ladder includes the following steps: Step 1: When the door is opened or the release switch SB1 is pressed, the first-stage step assembly and the second-stage step assembly are in the retracted state, and the first limit switch is in the contact state. The normally closed contact SQ1 is open to form an interlock to prevent the motor from burning out due to misoperation or stall. After the door is opened, the door stop switch SB3 is closed, the coil KM3 is energized, and the normally open contact KM3-1 is closed. At this time, the coil KM1 is energized and the normally open contacts KM1-1 and KM1-2 are closed, causing the worm gear motor to drive the first-stage step assembly to rotate clockwise. While the first-stage step assembly is rotating, the second-stage step assembly is driven to rotate through the connecting plates 12 on both sides, completing the simultaneous unfolding state of the first-stage step assembly and the second-stage step assembly. Step 2: When the first-stage step assembly and the second-stage step assembly are fully extended, the limit hinge seats on both sides are in the limit state; when the worm gear reducer motor rotates 90 degrees clockwise, the shaft touches the second limit switch, the normally closed contact SQ2 opens, KM1 is de-energized, and contacts KM1-1 and KM1-2 open, thereby de-energizing the worm gear reducer motor and stopping it from running, thus completing the extension action of the second-stage step assembly; Step 3: When the door is closed or the retraction switch SB2 is pressed, the first-stage step assembly and the second-stage step assembly are in the deployed state, the second limit switch is in the contact state, the normally closed contact SQ2 is open to form an interlock, preventing the worm gear reducer motor from burning out due to misoperation or stall. After the door is closed, the door stop switch SB3 is opened, the coil KM3 is de-energized, and the normally closed contact KM3-2 is closed. At this time, the coil KM2 is energized and the normally open contacts KM2-1 and KM2-2 are closed, and the worm gear reducer motor rotates counterclockwise to complete the synchronous retraction of the first-stage step assembly and the second-stage step assembly. Step 4: When the first-stage step assembly and the second-stage step assembly are fully retracted, the limit hinge seats on both sides are also in the limit state. After the worm gear reducer motor rotates 90 degrees counterclockwise, the shaft touches the first limit switch, and the normally closed contact SQ1 opens. At this time, KM2 is de-energized, and contacts KM2-1 and KM2-2 open. The worm gear reducer motor is de-energized and stops running. The retraction action of the second-stage step assembly is now complete.

[0011] In summary, this application includes at least one of the following beneficial technical effects: This electrically controlled protective vehicle-mounted double-step boarding ladder, by separately setting up a first-stage step assembly and a second-stage step assembly, allows for control of the extension and retraction of the double-steps during vehicle movement. This enables combat personnel to use the boarding ladder as a tactical platform independently, thereby meeting the diverse operational needs of the troops and improving the comfort of various personnel when boarding the vehicle. Attached Figure Description

[0012] Figure 1This is an axonometric view of the electrically controlled protective double-step vehicle boarding ladder of the present invention in the open state; Figure 2 This is a front view of the electrically controlled protective double-step vehicle ladder of the present invention in its open state. Figure 3 This is a side view of the electrically controlled protective double-step vehicle ladder of the present invention in the open state; Figure 4 This is an axial view of the closed state of the electrically controlled protective double-step vehicle ladder of the present invention; Figure 5 This is a front view of the electrically controlled protective vehicle double-step boarding ladder of the present invention in its closed state. Figure 6 This is a front view of the limiting hinge seat of the electrically controlled protective vehicle double-step boarding ladder of the present invention. Figure 7 This is a side view of the limiting hinge seat of the electrically controlled protective vehicle double-step boarding ladder of the present invention; Figure 8 This is a view of the retractable limit switch of the electrically controlled protective vehicle double-step boarding ladder of the present invention. Figure 9 This is a view of the travel switch in the lowered state of the electrically controlled protective vehicle double-step boarding ladder of the present invention. Figure 10 This is a schematic diagram of the electrical control system of the electrically controlled protective double-step vehicle ladder of the present invention.

[0013] In the diagram: 1. Hinge mounting bracket assembly; 2. Limit hinge seat; 3. First-stage step assembly; 4. First coupling; 5. Second coupling; 6. Worm gear reducer motor; 7. Motor mounting bracket; 8. First step fixing assembly; 9. First pin; 10. Second pin; 11. Second-stage step assembly; 12. Connecting plate; 13. Second step fixing assembly; 14. First limit switch; 15. Second limit switch. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figures 1-10 The present invention provides a technical solution: an electrically controlled protective vehicle double-step boarding ladder, comprising: a first-stage step assembly 3 and a second-stage step assembly 11; First, when the door is opened or the release switch SB1 is pressed, the first-stage step assembly 3 and the second-stage step assembly 11 are in the retracted state, and the first limit switch 14 is in the contact state. The normally closed contact SQ1 is open to form an interlock, preventing the motor from burning out due to misoperation or stalling. After the door is opened, the door stop switch SB3 closes, the coil KM3 is energized, and the normally open contact KM3-1 closes. At the same time, the coil KM1 is energized and the normally open contacts KM1-1 and KM1-2 close, causing the worm gear motor to drive the first-stage step. When assembly 3 rotates clockwise, the first-stage step assembly 3 rotates simultaneously, driving the second-stage step assembly 11 to rotate via the connecting plates 12 on both sides, thus completing the simultaneous unfolding of the first-stage step assembly 3 and the second-stage step assembly 11. When the first-stage step assembly 3 and the second-stage step assembly 11 are fully unfolded, the limit hinge seats 2 on both sides are in the limit state. When the worm gear reducer motor 6 rotates 90 degrees clockwise, the shaft touches the second limit switch 15, and the normally closed contact SQ2 opens. At this time, KM1 is de-energized, and contacts KM1-1 and KM1-2 open. This de-energizes the worm gear reducer motor 6, stopping its operation and thus completing the deployment of the secondary step assembly 11. The first step assembly 3 is fixedly connected to the first step fixing assembly 8 and the second step fixing assembly 13 on both sides via the limiting hinge seat 2 and the hinge mounting bracket assembly 1, respectively. The secondary step assembly 11 is fixedly connected to the first step fixing assembly 8 and the second step fixing assembly 13 on both sides via the first pin 9, respectively. Both sides of the first step assembly 3 and the secondary step assembly 11 are fixedly connected to connecting pins 10. The bottom of the first step fixing assembly 8 is fixedly mounted with a motor mounting bracket 7. A worm gear type geared motor 6 is fixedly mounted on the motor mounting bracket 7. The output shaft of the worm gear type geared motor 6 is fixedly connected to the first step assembly 3 through the second coupling 5 and the first coupling 4. The first step fixing assembly 8 is fixedly connected to the outer body, and the second step fixing assembly 13 is fixedly connected to the outer body. A first limit switch 14 is fixedly mounted on the limit hinge seat 2, and a second limit switch 15 is fixedly mounted on the limit hinge seat 2. Secondly, when the door is closed or the retraction switch SB2 is pressed, the first-stage step assembly 3 and the second-stage step assembly 11 are in the deployed state, the second limit switch 15 is in the contact action state, and the normally closed contact SQ2 is open to form an interlock, preventing the worm gear reducer motor 6 from burning out due to misoperation or stall. After the door is closed, the door stop switch SB3 is opened, the coil KM3 is de-energized, and the normally closed contact KM3-2 is closed. At this time, the coil KM2 is energized and the normally open contacts KM2-1 and KM2-2 are closed, energizing the worm gear reducer motor. 6. Rotate counterclockwise to complete the synchronous retraction of the first-stage step assembly 3 and the second-stage step assembly 11. When the first-stage step assembly 3 and the second-stage step assembly 11 are fully retracted, the limit hinge seats 2 on both sides are also in the limit state. After the worm gear reducer motor 6 rotates 90 degrees counterclockwise, the shaft touches the first limit switch 14, and the normally closed contact SQ1 opens. At this time, KM2 is de-energized, and contacts KM2-1 and KM2-2 open. The worm gear reducer motor 6 is de-energized and stops running. The retraction action of the second-stage step assembly 11 is now complete.

[0016] It should be noted that the electric-controlled protective vehicle's double-step boarding ladder can be controlled independently, and the control switch is located inside the door. The control switch can ignore the door's open / closed state and directly control the deployment and retraction of the first-stage step assembly 3 and the second-stage step assembly 11, for use as a tactical platform. In addition, this circuit has an emergency stop function. In case of unexpected situations during deployment or retraction, the emergency switch can be used for emergency stopping to prevent equipment damage. This circuit also has a motor protection function to prevent the motor from burning out due to stalling after reaching its destination.

[0017] Based on the above technical solution, the working steps of this solution are summarized as follows: When the car door is opened or the release switch SB1 is pressed, the first-stage step assembly 3 and the second-stage step assembly 11 are in the retracted state, and the first limit switch 14 is in the contact action state. The normally closed contact SQ1 is opened to form an interlock, preventing the motor from burning out due to misoperation or stalling. After the car door is opened, the door contact switch SB3 closes, the coil KM3 is energized, and the normally open contact KM3-1 closes. At this time, the coil KM1 is energized, and the normally open contacts KM1-1 and KM1-2 close, causing the worm gear motor to... The primary step assembly 3 rotates clockwise, and simultaneously, the secondary step assembly 11 rotates via the connecting plates 12 on both sides, thus completing the simultaneous unfolding of the primary step assembly 3 and the secondary step assembly 11. When the primary step assembly 3 and the secondary step assembly 11 are fully unfolded, the limit hinge seats 2 on both sides are in the limit state. When the worm gear reducer motor 6 rotates 90 degrees clockwise, the shaft touches the second limit switch 15, and the normally closed contact SQ2 opens. At this time, KM1 is de-energized, and contacts KM1-1 and KM1-2 open, thereby causing the worm gear... When the worm gear motor 6 is de-energized and stops operating, the secondary step assembly 11 completes its unfolding action. When the door is closed or the retraction switch SB2 is pressed, the primary step assembly 3 and the secondary step assembly 11 are in the unfolded state, the second limit switch 15 is in the contact state, and the normally closed contact SQ2 opens to form an interlock, preventing the worm gear motor 6 from burning out due to misoperation or stalling. After the door is closed, the door stop switch SB3 opens, the coil KM3 is de-energized, and the normally closed contact KM3-2 closes. At this time, the coil KM2 is energized, and the normally open contacts KM2-1 and KM... When 2-2 is closed, the worm gear reducer motor 6 rotates counterclockwise, completing the synchronous retraction of the first-stage step assembly 3 and the second-stage step assembly 11. When the first-stage step assembly 3 and the second-stage step assembly 11 are fully retracted, the limit hinge seats 2 on both sides are also in the limit state. After the worm gear reducer motor 6 rotates 90 degrees counterclockwise, the shaft touches the first limit switch 14, and the normally closed contact SQ1 opens. At this time, KM2 is de-energized, and contacts KM2-1 and KM2-2 open. The worm gear reducer motor 6 is de-energized and stops running. The retraction action of the second-stage step assembly 11 is now complete.

[0018] In summary, this electrically controlled protective vehicle-mounted double-step boarding ladder, by separately setting up a first-stage step assembly 3 and a second-stage step assembly 11, allows for control of the extension and retraction of the double-steps during vehicle movement. This enables combat personnel to use the boarding ladder as a tactical platform independently, thereby meeting the diverse operational needs of the troops and improving the comfort of various personnel when boarding the vehicle.

[0019] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of using an electrically controlled protective double-step vehicle ladder, characterized in that, The steps are as follows: Step 1: When the car door is opened or the down switch SB1 is pressed, the first step assembly (3) and the second step assembly (11) are in the retracted state, and the first limit switch (14) is in the contact action state. The normally closed contact SQ1 is opened to form an interlock to prevent the motor from burning out due to misoperation or stall. After the car door is opened, the door stop switch SB3 is closed, the coil KM3 is energized, and the normally open contact KM3-1 is closed. At this time, the coil KM1 is energized and the normally open contacts KM1-1 and KM1-2 are closed, so that the worm gear reducer motor (6) drives the first step assembly (3) to rotate clockwise. While the first step assembly (3) is rotating, the second step assembly (11) is driven to rotate through the connecting plates (12) on both sides, thus completing the simultaneous unfolding state of the first step assembly (3) and the second step assembly (11). Step 2: When the first step assembly (3) and the second step assembly (11) are fully unfolded, the limit hinge seats (2) on both sides are in the limit state; when the worm gear reducer motor (6) rotates 90 degrees clockwise, the shaft touches the second limit switch (15), the normally closed contact SQ2 is opened, KM1 is de-energized, and the normally open contacts KM1-1 and KM1-2 are opened, thereby de-energizing the worm gear reducer motor (6) and stopping its operation, thus completing the unfolding action of the second step assembly (11); Step 3: When the car door is closed or the retraction switch SB2 is pressed, the first-stage step assembly (3) and the second-stage step assembly (11) are in the unfolded state, the second limit switch (15) is in the contact action state, the normally closed contact SQ2 is opened to form an interlock, preventing the worm gear reducer motor (6) from burning out due to misoperation or stall. After the car door is closed, the door stop switch SB3 is opened, the coil KM3 is de-energized, and the normally closed contact KM3-2 is closed. At this time, the coil KM2 is energized and the normally open contacts KM2-1 and KM2-2 are closed. The worm gear reducer motor (6) rotates counterclockwise to complete the synchronous retraction of the first-stage step assembly (3) and the second-stage step assembly (11). Step 4: When the first step assembly (3) and the second step assembly (11) are fully retracted, the limit hinge seats (2) on both sides are also in the limit state. When the worm gear reducer motor (6) rotates 90 degrees counterclockwise, the shaft touches the first limit switch (14). The normally closed contact SQ1 is opened. At this time, KM2 is de-energized, and the normally open contacts KM2-1 and KM2-2 are opened. The worm gear reducer motor (6) is de-energized and stops running. The retraction action of the second step assembly (11) is now complete. An electrically controlled protective double-step vehicle boarding ladder includes a first-stage step assembly (3) and a second-stage step assembly (11). The first-stage step assembly (3) is fixedly connected to a first-stage step fixing assembly (8) and a second-stage step fixing assembly (13) on both sides via a limiting hinge seat (2) and a hinge mounting bracket assembly (1), respectively. The second-stage step assembly (11) is fixedly connected to the first-stage step fixing assembly (8) and the second-stage step fixing assembly (13) on both sides via a first pin (9), respectively. Next, both sides of the first step assembly (3) and the second step assembly (11) are fixedly connected to the connecting plate (12) by the second pin (10). The bottom of the first step fixing assembly (8) is fixedly installed with the motor mounting bracket (7). The motor mounting bracket (7) is fixedly installed with the worm gear type geared motor (6). The output shaft of the worm gear type geared motor (6) is fixedly connected to the first step assembly (3) by the second coupling (5) and the first coupling (4). The first step fixing assembly (8) is fixedly connected to the external vehicle body; The second step fixing assembly (13) is fixedly connected to the external vehicle body; A first limit switch (14) is fixedly installed on the limiting hinge seat (2); A second limit switch (15) is fixedly installed on the limiting hinge seat (2).

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