Electric control protection type two-stage stepping boarding ladder for vehicle

Abstract

The utility model discloses an electric control protection type vehicle two-stage stepping boarding ladder which comprises a first-stage stepping assembly and a second-stage stepping assembly, and the two sides of the first-stage stepping assembly are fixedly connected with a first stepping fixing assembly and a second stepping fixing assembly through a limiting hinge base and a hinge installation frame assembly respectively. The two sides of the second-level step assembly are fixedly connected with the first step fixing assembly and the second step fixing assembly through first pin shafts correspondingly, and the two sides of the first-level step assembly and the two sides of the second-level step assembly are fixedly connected with connecting plates through second pin shafts correspondingly. According to the two-stage stepping boarding ladder for the electric control protection type vehicle, the first-stage stepping assembly and the second-stage stepping assembly are arranged, stretching and retracting of the two-stage stepping can be controlled in the advancing process of the vehicle, so that combat personnel can independently take the boarding ladder as a tactical platform, the use requirements of diversified combat of troops are met, and the practicability is high. And the comfort of various people in the boarding process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steps, in particular to an electric controlled protective double-stage vehicle step ladder. Background Art

[0002] As we all know, existing protective vehicles are often equipped with ordinary mechanical single-step boarding ladders. Due to the high ground clearance between the floor of the medium-sized high-mobility chassis and the ground, the single-step boarding ladder cannot meet the comfort requirements of various groups of people when boarding the vehicle. For this reason, we propose an electrically controlled double-step boarding ladder for protective vehicles.

[0003] The above information disclosed in the Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may include information that does not constitute the prior art that is already known to one of ordinary skill in the art. Utility Model Content

[0004] The utility model aims to provide an electrically controlled protective vehicle-use double-step boarding ladder to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrically controlled protective two-stage vehicle step ladder, comprising: a first-stage step assembly and a second-stage step assembly, the first-stage step assembly is fixedly connected to a first step fixing assembly and a second step fixing assembly on both sides through a limit hinge seat and a hinge mounting frame assembly, the second-stage step assembly is fixedly connected to the first step fixing assembly and the second step fixing assembly on both sides through a first pin shaft, the first-stage step assembly and the second-stage step assembly are fixedly connected to a connecting plate on both sides through a second pin shaft, a motor mounting frame is fixedly installed at the bottom of the first step fixing assembly, a worm gear reduction motor is fixedly installed on the motor mounting frame, and the output shaft of the worm gear reduction motor is fixedly connected to the first-stage step assembly through 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 travel switch is fixedly mounted on the limit hinge seat.

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

[0010] In summary, the present application includes at least one of the following beneficial technical effects:

[0011] This electrically controlled protective vehicle-use double-stage step boarding ladder has a first-stage step assembly and a second-stage step assembly respectively, so that the extension and retraction of the double-stage steps can be controlled during the movement of the vehicle, so that combat personnel can use the boarding ladder as a tactical platform alone, thereby meeting the use needs of the troops in diversified operations and improving the comfort of various groups of people when boarding the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an isometric view of the electric controlled protective vehicle-use double-step boarding ladder of the utility model in the open state;

[0013] Figure 2 This is a front view of the electric controlled protective vehicle double-step boarding ladder of the utility model in an open state;

[0014] Figure 3 It is a side view of the electric control protection type vehicle double-step boarding ladder of the utility model in the open state;

[0015] Figure 4 This is an axial view of the electric control protection type vehicle-use double-step boarding ladder of the utility model in a closed state;

[0016] Figure 5 This is a front view of the electric controlled protective vehicle double-step boarding ladder of the utility model in a closed state;

[0017] Figure 6 It is a front view of a limit hinge seat of the electric control protection type vehicle double-step boarding ladder of the utility model;

[0018] Figure 7 It is a side view of a limit hinge seat of the electric control protection type vehicle double-step boarding ladder of the utility model;

[0019] Figure 8 This is a view of the travel switch of the retracted state of the electric control protective vehicle double-step boarding ladder of the utility model;

[0020] Fig. 9 This is a view of the travel switch of the lowered state of the electric control protective vehicle double-step boarding ladder of the utility model;

[0021] Fig.10 The utility model is a schematic diagram of the electric control system of the electric control protection type vehicle-use double-step boarding ladder.

[0022] In the figure: 1. hinge mounting frame assembly; 2. limit hinge seat; 3. first step assembly; 4. first coupling; 5. second coupling; 6. worm gear reduction motor; 7. motor mounting frame; 8. first step fixing assembly; 9. first pin shaft; 10. second pin shaft; 11. second step assembly; 12. connecting plate; 13. second step fixing assembly; 14. first travel switch; 15. second travel switch. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 10 The utility model provides a technical solution: an electric control protective vehicle double-step boarding ladder, comprising: a first-level step assembly 3 and a second-level step assembly 11;

[0025] First, when the door is opened or the switch SB1 is pressed, the first-stage step assembly 3 and the second-stage step assembly 11 can be in the retracted state, and the first travel switch 14 is in the contact action state, and the normally closed contact SQ1 is disconnected to form an interlock to prevent the motor from burning out due to misoperation or stalling. After the door is opened, the door contact switch SB3 is closed, the coil KM3 is powered on, and the normally open contact KM3-1 is closed. At this time, the coil KM1 is powered on and the normally open contacts KM1-1 and KM1-2 are closed, so that the worm gear motor drives the first-stage step. The assembly 3 rotates clockwise, and the first-stage step assembly 3 rotates while driving the second-stage step assembly 11 to rotate through the connecting plates 12 on both sides, completing the simultaneous expansion state 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 expanded, the limit hinge seats 2 on both sides are in the limit state; when the worm gear reduction motor 6 rotates 90 degrees clockwise, the shaft touches the second travel switch 15, and the normally closed contact SQ2 is disconnected. At this time, KM1 loses power, and the contacts KM1-1 and KM1-2 are disconnected. Thereby, the worm gear reduction motor 6 is powered off and stops running, and then the second step assembly 11 is unfolded. 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 through the limit hinge seat 2 and the hinge mounting frame assembly 1, and the second step assembly 11 is fixedly connected to the first step fixing assembly 8 and the second step fixing assembly 13 on both sides through the first pin shaft 9. The first step assembly 3 and the second step assembly 11 are fixedly connected to each other on both sides through the second pin shaft 10. The connecting plate 12, the bottom of the first step fixing assembly 8 is fixedly installed with a motor mounting frame 7, the motor mounting frame 7 is fixedly installed with a worm gear type reduction motor 6, the output shaft of the worm gear type reduction 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 external vehicle body, the second step fixing assembly 13 is fixedly connected to the external vehicle body, the limit hinge seat 2 is fixedly installed with a first travel switch 14, and the limit hinge seat 2 is fixedly installed with a second travel switch 15;

[0026] 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 extended state, the second travel switch 15 is in the contact action state, and the normally closed contact SQ2 is disconnected to form an interlock to prevent the worm gear reduction motor 6 from burning out due to misoperation or stalling. After the door is closed, the door contact switch SB3 is disconnected, the coil KM3 loses power, 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 reduction motor 6 rotates counterclockwise to complete the synchronous retraction of the first-level step assembly 3 and the second-level step assembly 11; when the first-level step assembly 3 and the second-level step assembly 11 are fully retracted, the limit hinge seats 2 on both sides are also in the limit state, and when the worm gear reduction motor 6 rotates counterclockwise 90 degrees, the shaft touches the first travel switch 14, the normally closed contact SQ1 is disconnected, KM2 loses power at this time, contacts KM2-1 and KM2-2 are disconnected, the worm gear reduction motor 6 is powered off and stops running, and the retraction action of the second-level step assembly 11 is completed.

[0027] It should be noted that: the two-stage step boarding ladder of the electrically controlled protective vehicle can be independently controlled at the same time, and the control switch is located on the inside of the door; the control switch can ignore the door switch state, and directly control the deployment and retraction state of the first-stage step assembly 3 and the second-stage step assembly 11, and is used as a tactical platform; in addition, this circuit is provided with an emergency stop function. When an unexpected situation occurs during lowering or retracting, the emergency switch can be used for emergency stop to prevent equipment damage; this circuit also has a motor protection function to prevent the motor from burning out due to stalling after it is in place.

[0028] According to the above technical solution, the working steps of this solution are summarized and sorted out: when the car door is opened or the switch SB1 is pressed, the first step assembly 3 and the second step assembly 11 can be in the retracted state, and the first travel switch 14 is in the contact action state, and the normally closed contact SQ1 is disconnected to form an interlock to prevent the motor from burning due to misoperation or stalling. After the car door is opened, the door touch switch SB3 is closed, the coil KM3 is powered on, and the normally open contact KM3-1 is closed. At this time, the coil KM1 is powered on and the normally open contacts KM1-1 and KM1-2 are closed, so that the worm gear motor The first-stage step assembly 3 is driven to rotate clockwise, and the second-stage step assembly 11 is driven to rotate through the connecting plates 12 on both sides at the same time, so that the first-stage step assembly 3 and the second-stage step assembly 11 are simultaneously unfolded; 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 reduction motor 6 rotates 90 degrees clockwise, the shaft touches the second travel switch 15, and the normally closed contact SQ2 is disconnected. At this time, KM1 loses power, and the contacts KM1-1 and KM1-2 are disconnected, so that the worm gear The worm gear type reduction motor 6 is powered off and stops running, so that the second-stage step assembly 11 is unfolded; 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 unfolded state, the second travel switch 15 is in the contact action state, and the normally closed contact SQ2 is disconnected to form an interlock to prevent the worm gear type reduction motor 6 from burning due to misoperation or stalling. After the door is closed, the door contact switch SB3 is disconnected, the coil KM3 loses power, 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 KM 2-2 is closed, and the worm gear reduction motor 6 rotates 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, and when the worm gear reduction motor 6 rotates 90 degrees counterclockwise, the shaft touches the first stroke switch 14, and the normally closed contact SQ1 is disconnected. At this time, KM2 loses power, contacts KM2-1 and KM2-2 are disconnected, the worm gear reduction motor 6 is powered off and stops running, and the retraction action of the second-stage step assembly 11 is completed.

[0029] In summary: the electrically controlled protective vehicle-use two-stage step boarding ladder can control the extension and retraction of the two-stage steps during the movement of the vehicle by respectively setting a first-stage step assembly 3 and a second-stage step assembly 11, so that combatants can use the boarding ladder as a tactical platform alone, thereby meeting the diversified combat needs of the troops and improving the comfort of various groups of people when boarding the vehicle.

[0030] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is 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 present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electrically controlled protective vehicle-use double-step ladder, characterized in that: include: A first-stage step assembly (3) and a second-stage step assembly (11), wherein the first-stage step assembly (3) is respectively fixedly connected to a first step fixing assembly (8) and a second step fixing assembly (13) on both sides through a limit hinge seat (2) and a hinge mounting frame assembly (1), and the second-stage step assembly (11) is respectively fixedly connected to the first step fixing assembly (8) and the second step fixing assembly (13) on both sides through a first pin shaft (9). Both sides of the first-stage step assembly (3) and the second-stage step assembly (11) are fixedly connected to a connecting plate (12) through a second pin shaft (10), and a motor mounting frame (7) is fixedly mounted on the bottom of the first step fixing assembly (8), and a worm gear type reduction motor (6) is fixedly mounted on the motor mounting frame (7), and the output shaft of the worm gear type reduction motor (6) is fixedly connected to the first-stage step assembly (3) through a second coupling (5) and a first coupling (4).

2. The electrically controlled protective two-step vehicle ladder according to claim 1 is characterized in that: The first step fixing assembly (8) is fixedly connected to the external vehicle body.

3. The electrically controlled protective two-step vehicle ladder according to claim 1 is characterized in that: The second step fixing assembly (13) is fixedly connected to the external vehicle body.

4. The electrically controlled protective two-step vehicle ladder according to claim 1 is characterized in that: A first travel switch (14) is fixedly mounted on the limit hinge seat (2).

5. The electrically controlled protective two-step vehicle ladder according to claim 4 is characterized in that: A second travel switch (15) is fixedly mounted on the limit hinge seat (2).

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