A motor home side extension platform mechanism and working method

Abstract

The application relates to a motor home side expansion platform mechanism and a working method, which comprises a motor home main body and a main frame arranged on the motor home main body. A step compartment is slidably arranged at one end of the main frame away from the motor home main body. A folding ladder is arranged in the step compartment. A transverse driving assembly is arranged on the step compartment. The transverse driving assembly comprises a second electric push rod. The second electric push rod base is hingedly connected with the main frame. The output shaft of the second electric push rod is connected with the step compartment. A locking assembly is arranged on the main frame. The locking assembly comprises a first electric push rod, a locking shaft and a first photoelectric sensor. The locking shaft is movably connected with the output shaft of the first electric push rod. A locking hole is formed in the step compartment along the thickness direction. When the transverse driving assembly is in an initial state, the output shaft of the first electric push rod drives the locking shaft to move into the locking hole. The application has the effects of improving the stability of the step structure during the expansion and contraction process of the motor home and improving the space utilization rate of the effective space of the motor home.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of recreational vehicles, in particular to a recreational vehicle side expansion platform mechanism and working method. BACKGROUND

[0002] As a mobile space integrating transportation and living functions, the recreational vehicle provides convenience for users to travel freely, camp outdoors, travel as a family, and seek refuge in emergencies, and is suitable for multiple scenarios such as mobile office and medical rescue, and plays an important role in modern life.

[0003] Because there is a certain distance between the height of the cabin of the recreational vehicle and the ground, in order to facilitate users to enter the cabin, a stair structure needs to be provided at the door body of the recreational vehicle. The common stair structure is usually located inside the cabin. After the door body is closed, the stair structure is located inside the cabin. However, there is a problem that because the internal space of the cabin is limited, the method of using the stair structure inside the cabin needs to occupy the internal space of the cabin.

[0004] Therefore, in order to reduce the space occupied by the stair structure inside the cabin, the recreational vehicle is usually provided with an external stair structure, that is, a stair compartment is installed on the main beam near the door body of the recreational vehicle, and a telescopic stair is installed in the stair compartment. When the telescopic stair needs to be used, the controller controls the telescopic stair to expand along the door body. In order to avoid the stair compartment from shaking or falling off along the main beam, the stair compartment is in a fixed state along the main beam. The telescopic stair is limited by the expansion space, which causes the telescopic stair to adopt a multi-stage telescopic structure. There is a problem that for a recreational vehicle with a higher chassis, as the number of stages of the telescopic stair increases, the rigidity and carrying capacity of the telescopic stair as a whole will be weakened. When the user uses the telescopic stair, the user will shake, and as the use time increases, the stability will further weaken. The method of improving the structure and material of the telescopic stair is costly, and there is room for improvement. SUMMARY

[0005] The purpose of the present application is to improve the stability of the stair structure during the expansion and contraction of the recreational vehicle, and to improve the space utilization rate of the effective space of the recreational vehicle. The present application provides a recreational vehicle side expansion platform mechanism and working method.

[0006] In order to achieve the above-mentioned purpose, the recreational vehicle side expansion platform mechanism and working method provided by the present application adopts the following technical solution:

[0007] In a first aspect, the application discloses a motor home side expansion platform mechanism, which comprises a motor home body and a main frame arranged on the motor home body, one end of the main frame away from the motor home body is slidably provided with a step compartment, a folding ladder is arranged in the step compartment, a transverse driving assembly is arranged on the step compartment, the transverse driving assembly comprises a second electric push rod, a base of the second electric push rod is hingedly connected with the main frame, an output shaft of the second electric push rod is connected with the step compartment, a locking assembly is arranged on the main frame, the locking assembly is used for locking the step compartment with the main frame when the second electric push rod is in an initial state, the locking assembly comprises a first electric push rod, a locking shaft and a first photoelectric sensor, the locking shaft is movably connected with an output shaft of the first electric push rod, a locking hole is formed in the step compartment along a thickness direction, when the transverse driving assembly is in the initial state, the output shaft of the first electric push rod drives the locking shaft to move into the locking hole, and the first photoelectric sensor is used for detecting whether the locking shaft is located in the locking hole.

[0008] Preferably, a guide assembly is arranged on the main frame near the locking shaft, the guide assembly comprises a guide seat and a guide sleeve arranged in the guide seat, an inner diameter of the guide sleeve and a diameter of the locking shaft are in a transition fit tolerance matching relationship, a flat position is formed in the locking shaft, and a positioning rod is arranged on the guide sleeve, when the locking shaft is located in the guide sleeve, the positioning rod abuts against the flat position.

[0009] Preferably, an avoiding groove is formed in the step compartment, and the second electric push rod is located in the avoiding groove.

[0010] Preferably, the transverse driving assembly further comprises a guide piece, the guide piece comprises a guide sliding rail and a guide sliding block, the guide sliding rail is arranged on the main frame, the guide sliding block is slidably matched with the guide sliding rail, and the guide sliding block is fixedly connected with the step compartment.

[0011] Preferably, a main driving assembly is arranged in the step compartment, the main driving assembly comprises a third electric push rod, and the third electric push rod is used for driving the folding ladder to expand or contract.

[0012] Preferably, a closing door is movably connected to the step compartment, the folding ladder is connected to the closing door, a locking piece is arranged on the closing door, and the locking piece is used for locking the closing door to the step compartment.

[0013] Preferably, a transverse positioning assembly is further included, the transverse positioning assembly includes a second photoelectric sensor, a third photoelectric sensor and a positioning block, the second photoelectric sensor and the third photoelectric sensor are arranged on the main frame along the width direction of the step compartment, and the positioning block is arranged on the step compartment, and when the step compartment is in the initial position along the main frame, the detection end of the second photoelectric sensor faces the positioning block.

[0014] Preferably, a sliding assembly is arranged on the main frame above the step compartment, and the sliding assembly is connected with the side extension frame.

[0015] In a second aspect, the application discloses a working method of a motor home side extension platform structure, which is applied to the motor home side extension platform structure as described in the first aspect and includes the following steps.

[0016] S1, the output shaft of the first electric push rod drives the locking shaft to move away from the locking hole along the main frame;

[0017] S2, the first photoelectric sensor detects the position of the locking shaft;

[0018] S3, when the locking shaft is separated from the locking hole, the output shaft of the second electric push rod drives the step compartment to slide along the main frame, and the output shaft of the third electric push rod drives the folding ladder to unfold along the step compartment;

[0019] S4, when the output shaft of the third electric push rod reverses the movement, the third electric push rod drives the folding ladder to fold along the step compartment, and the output shaft of the second electric push rod drives the step compartment to slide along the main frame;

[0020] S5, when the detection end of the second photoelectric sensor faces the positioning block, the output shaft of the first electric push rod drives the locking shaft to move towards the locking hole along the main frame until the locking shaft is located in the locking hole.

[0021] Compared with the prior art, the motor home side extension platform mechanism and the working method have the following beneficial effects:

[0022] 1. The step compartment can be driven by the second electric push rod to slide along the main frame, so that the folding ladder can be freely extended along the main frame, when the folding ladder does not need to be extended along the main frame, the step compartment and the main frame are locked by the locking assembly, when the folding ladder needs to be extended along the main frame, the locking assembly is separated from the step compartment, at this time, the step compartment can be smoothly extended along the main frame by the second electric push rod, without increasing the number of the folding ladder, and the stability of the step compartment in the initial state is improved by the locking effect of the locking assembly, so that the step compartment is prevented from sliding out along the main frame due to external force, and the stability of the step compartment and the main frame is improved.

[0023] 2. The first photoelectric sensor detects the movement of the output shaft of the first electric push rod carrying the locking shaft into the locking hole, determines whether the locking shaft is located in the locking hole by detecting the length of the output shaft of the first electric push rod, improves the safety performance, avoids the deviation of the position of the locking shaft and the locking hole, causes the locking shaft to fail to be locked with the locking hole, and thus the case that the step compartment slides along the main frame during the movement of the motor home body occurs;

[0024] 3. The locking shaft is in a straight line motion state when moving to the locking hole through the cooperation of the guide sleeve and the locking shaft, avoids the change of the movement path of the locking shaft when the output shaft of the first electric push rod drives the locking shaft to move to the locking hole, causes the locking shaft to fail to be inserted into the locking hole, and at the same time, the flat position is arranged on the locking shaft, the movement track of the locking shaft along the guide sleeve is limited through the cooperation of the flat position and the positioning rod, the locking shaft is in a straight line motion state along the guide sleeve, and the locking shaft will not rotate along the guide sleeve, the friction force borne by the locking shaft is reduced, and thus the mechanical wear rate of the locking shaft and the guide sleeve is slowed down. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a whole structure schematic diagram of a motor home side expansion platform mechanism in an embodiment of the application.

[0026] Figure 2 is Figure 1 is an enlarged structure schematic diagram of part A in

[0027] Figure 3 is a cooperation relationship schematic diagram of a main frame and a step compartment in a motor home side expansion platform mechanism in an embodiment of the application.

[0028] Figure 4 is a cooperation relationship schematic diagram of a limiting frame and a step compartment in a motor home side expansion platform mechanism in an embodiment of the application.

[0029] Figure 5 is Figure 4 is a structure schematic diagram of a cooperation relationship between a limiting frame and a step compartment in a motor home side expansion platform mechanism in an embodiment of the application.

[0030] Figure 6 is a cooperation relationship schematic diagram of a mounting box and a locking assembly in a motor home side expansion platform mechanism in an embodiment of the application.

[0031] FIG. 7 is Figure 6 is a structure schematic diagram of a cooperation relationship between a mounting box and a locking assembly in a motor home side expansion platform mechanism.

[0032] Figure 8 is a cooperation relationship schematic diagram of a main drive assembly and a folding ladder in a motor home side expansion platform mechanism in an embodiment of the application.

[0033] Fig. 9 is a schematic view of the cooperation between the step compartment and the main frame and the buffer assembly in another embodiment of the present application.

[0034] Figure 10 is Figure 9 A cross-sectional structure schematic view of the cooperation between the positioning cylinder and the plug-in cylinder in the buffer assembly.

[0035] Reference signs: 1, motor home main body; 2, main frame; 21, step compartment; 211, folding ladder; 213, avoidance groove; 214, closing door; 215, damping piece; 3, transverse driving assembly; 31, second electric push rod; 32, guide piece; 321, guide slide rail; 322, guide sliding block; 33, first hinged seat; 34, first fixed seat; 4, locking assembly; 41, first electric push rod; 42, locking shaft; 422, limit movable groove; 423, reference block; 43, first photoelectric sensor; 5, guide assembly; 51, guide seat; 52, guide sleeve; 6, main driving assembly; 61, third electric push rod; 62, base; 63, connecting seat; 7, locking piece; 8, transverse positioning assembly; 81, second photoelectric sensor; 82, third photoelectric sensor; 83, positioning block; 9, sliding assembly; 91, positioning slide rail; 92, guide wheel; 10, side extension frame; 11, mounting area; 111, limit frame; 12, mounting box; 13, buffer assembly; 131, positioning cylinder; 132, plug-in cylinder; 14, connecting plate. DETAILED DESCRIPTION

[0036] The following will be described in detail below with reference to the accompanying Figures 1-10 The present application will be further described in detail.

[0037] The present application discloses a motor home side extension platform mechanism and a working method.

[0038] In the first aspect, with reference to Figure 1 , Figure 2 and Figure 3 , the present application discloses a motor home side extension platform mechanism, which comprises a motor home main body 1 and a main frame 2 arranged on the motor home main body 1, and a step compartment 21 arranged at the end of the main frame 2 away from the motor home main body 1, wherein the step compartment 21 is arranged to slide, and a folding ladder 211 is arranged in the step compartment 21, and a transverse driving assembly 3 is arranged on the step compartment 21.

[0039] With reference to Figure 4 and Figure 5 , the transverse driving assembly 3 comprises a second electric push rod 31, the base of the second electric push rod 31 is hinged to the main frame 2, and the output shaft of the second electric push rod 31 is connected to the step compartment 21, and a locking assembly 4 is arranged on the main frame 2, and the locking assembly 4 is used to lock the step compartment 21 and the main frame 2 when the second electric push rod 31 is in an initial state.

[0040] First of all, it needs to be explained that the definition: the output shaft of the second electric push rod 31 is in the retracted state, and the step compartment 21 is not extended along the main frame 2, which is the initial state.

[0041] Specifically, the main frame 2 side wall is provided with a mounting area 11, and the step compartment 21 is located in the mounting area 11. When the step compartment 21 is located in the mounting area 11, the step compartment 21 and the edge of the main frame 2 are in a flush state.

[0042] Further, the transverse driving assembly 3 further comprises a first hinge seat 33 and a first fixed seat 34. The first hinge seat 33 is fixed in the mounting area 11 by bolts, and the first fixed seat 34 is installed in the step compartment 21. The base of the second electric push rod 31 is movably connected with the first hinge seat 33 through a pin shaft, and the output shaft of the second electric push rod 31 is movably connected with the first fixed seat 34 through a pin shaft.

[0043] Correspondingly, the step compartment 21 is provided with a avoiding slot 213, and the second electric push rod 31 is located in the avoiding slot 213. The avoiding slot 213 is formed by the side wall of the step compartment 21 from one end of the first hinge seat 33 along the thickness direction of the step compartment 21, so that the second electric push rod 31 can be located inside the step compartment 21 when it is in the initial state, improving the space utilization of the step compartment 21, and protecting the second electric push rod 31 from damage caused by accidental external force.

[0044] On the other hand, the transverse driving assembly 3 further comprises a guide 32, which comprises a guide rail 321 and a guide block 322. The guide rail 321 is arranged on the main frame 2, and the guide block 322 is slidably connected with the guide rail 321. The guide block 322 is fixedly connected with the step compartment 21.

[0045] Among them, in order to improve the stability and smoothness of the step compartment 21 when moving along the main frame 2, in this embodiment, the guide 32 is provided with four groups, two of which are installed on the side walls of the step compartment 21 along the width direction, and the two groups are arranged in the same direction. The other two groups are installed on the other side wall of the step compartment 21 along the width direction. At this time, the four groups of guides 32 are symmetrically installed on the two side walls of the step compartment 21 along the width direction about the center line of the step compartment 21 along the width direction.

[0046] Therefore, when the second electric push rod 31 is powered on, the output shaft of the second electric push rod 31 is extended. Because the output shaft of the second electric push rod 31 is movably connected with the first fixed seat 34, through the cooperation of the guide rail 321 and the guide block 322, the step compartment 21 is driven to slide along the guide rail 321, so that the step compartment 21 can smoothly move along the main frame 2, with high stability,

[0047] In addition, the step cabin 21 is provided with a damping member 215 on the side wall of the first hinge seat 33, the damping member 215 can be made of rubber material, so as to have impact resistance and damping capacity, when the output shaft of the second electric push rod 31 drives the step cabin 21 to move towards the first hinge seat 33, the damping member 215 defines the limit distance of the step cabin 21 moving towards the main frame 2 along the guide rail 321, and the damping member 215 reduces the force borne by the step cabin 21 when abutting against the main frame 2, and reduces the noise when the step cabin 21 moves towards the main frame 2.

[0048] With reference to Figure 3 And Figure 4 Further comprising a transverse positioning assembly 8, the transverse positioning assembly 8 comprises a second photoelectric sensor 81, a third photoelectric sensor 82 and a positioning block 83, the second photoelectric sensor 81 and the third photoelectric sensor 82 are arranged on the main frame 2 along the width direction of the step cabin 21, and the positioning block 83 is arranged on the step cabin 21, when the step cabin 21 is in the initial position along the main frame 2, the detection end of the second photoelectric sensor 81 faces the positioning block 83, the positioning block 83 provides a positioning reference for the second photoelectric sensor 81 and the third photoelectric sensor 82, and the first photoelectric sensor 43, the second photoelectric sensor 81, the third photoelectric sensor 82, the first electric push rod 41 and the second electric push rod 31 are electrically connected with the controller.

[0049] The controller can be a PLC (Programmable Logic Controller), which has multiple functions such as logic control, time sequence control, analog control and multi-machine communication, and has a man-machine interface to facilitate the control and adjustment of the PLC. The specific composition and working principle of the existing controller are not described here.

[0050] Specifically, the mounting area 11 is fixed with a limiting frame 111 at both ends in the length direction, the second photoelectric sensor 81 and the third photoelectric sensor 82 are sequentially arranged on the limiting frame 111 in the width direction of the limiting frame 111, and the second photoelectric sensor 81 is close to the first hinge seat 33.

[0051] With reference to Figure 6 And Figure 7 The locking assembly 4 comprises a first electric push rod 41, a locking shaft 42 and a first photoelectric sensor 43, the first photoelectric sensor 43 and the first electric push rod 41 are electrically connected with the controller. The locking shaft 42 is movably connected with the output shaft of the first electric push rod 41, the step cabin 21 is provided with a locking hole (not shown in the figure) penetrating in the thickness direction, when the transverse driving assembly 3 is in the initial state, the output shaft of the first electric push rod 41 drives the locking shaft 42 to move into the locking hole, and the first photoelectric sensor 43 is used to detect whether the locking shaft 42 is located in the locking hole.

[0052] In the embodiment, the locking assembly 4 is provided with two groups, and the two groups of locking assemblies 4 are symmetrically arranged on the limiting frame 111 on the two side walls of the stair compartment 21 along the midline of the width direction of the stair compartment 21. Since the components of the two groups of locking assemblies 4 and the matching mode with the stair compartment 21 are the same, in order to facilitate the description, the matching relationship between the limiting assembly on the side of the second photoelectric sensor 81 and the third photoelectric sensor 82 and the stair compartment 21 is described in detail below.

[0053] Among them, the mounting box 12 is fixed on the limiting frame 111 through bolts, and the first electric push rod 41 is installed on the mounting box 12. At this time, the output shaft of the first electric push rod 41 faces the side wall of the stair compartment 21.

[0054] Specifically, the locking shaft 42 is provided with a limiting movable groove 422 at one end connected with the first electric push rod 41, and the output shaft of the first electric push rod 41 is located in the limiting movable groove 422. The output shaft of the first electric push rod 41 and the locking shaft 42 are connected through a pin shaft, so that the output shaft of the first electric push rod 41 and the locking shaft 42 are in a movable connection state.

[0055] At the same time, the locking shaft 42 is provided with a reference block 423 at one end connected with the first electric push rod 41. When the output shaft of the first electric push rod 41 is in a retracted state, the detection end of the first photoelectric sensor 43 is opposite to the reference block 423.

[0056] Further, referring to Figure 7 , the main frame 2 near the locking shaft 42 is provided with a guide assembly 5, and the guide assembly 5 includes a guide seat 51 and a guide sleeve 52 arranged in the guide seat 51. The inner diameter of the guide sleeve 52 and the diameter of the locking shaft 42 are in a transition fit relationship, and the locking shaft 42 is provided with a flat position (not shown in the figure). The guide sleeve 52 is provided with a positioning rod (not shown in the figure), and when the locking shaft 42 is located in the guide sleeve 52, the positioning rod abuts against the flat position.

[0057] Specifically, the guide seat 51 is fixed on the mounting box 12 through bolts, and the guide seat 51 is provided with a fixed hole penetrating through along the thickness direction. The guide sleeve 52 is coaxially fixed with the fixed hole, and the guide sleeve 52 can be made of copper material to improve the wear resistance of the guide sleeve 52. And the guide sleeve 52 and the locking shaft 42 are in a coaxial state, and the locking shaft 42 slides through the guide sleeve 52.

[0058] Therefore, when the output shaft of the first electric push rod 41 drives the locking shaft 42 to move along the guide sleeve 52, the movement path of the locking shaft 42 along the mounting box 12 is limited through the guiding effect of the guide sleeve 52, and the movement path of the locking shaft 42 along the mounting box 12 is improved.

[0059] Correspondingly, the positioning rod thread penetrates through the guide seat 51 and the guide sleeve 52 and extends to the inside of the guide sleeve 52. When the locking shaft 42 is located in the inside of the guide sleeve 52, the positioning rod abuts against the flat position of the locking shaft 42, thereby limiting the path of the movement of the locking shaft 42 along the guide sleeve 52 and enabling the locking shaft 42 to move linearly along the guide sleeve 52, effectively solving the problem of the rotation of the locking shaft 42 along the guide sleeve 52 during the movement of the locking shaft 42 along the guide sleeve 52, and playing a positive guiding role in reducing the circumferential torsion value borne by the output shaft of the first electric push rod 41 during the movement of the output shaft of the first electric push rod 41 towards the locking hole.

[0060] It should also be defined here that when the step cabin 21 moves away from the installation area 11 along the guide slide rail 321, the distance between the one end of the step cabin 21 towards the first hinged seat 33 and the second photoelectric sensor 81 is the maximum, that is, the limit distance of the step cabin 21 along the guide slide rail 321 away from the installation area 11, and the third photoelectric sensor 82 is installed on the limiting frame 111 at the limit distance of the step cabin 21 along the guide slide rail 321 away from the installation area 11.

[0061] Therefore, when the locking shaft 42 is located in the locking hole, the detection end of the second photoelectric sensor 81 can be directed towards the positioning block 83, which plays a role in that when the output shaft of the second electric push rod 31 is driven to move by the controller, so as to drive the step cabin 21 to move towards the installation area 11, the detection end of the second photoelectric sensor 81 continuously scans, and when the detection end of the second photoelectric sensor 81 identifies the positioning block 83, it indicates that the locking shaft 42 is now opposite to the locking hole. The second photoelectric sensor 81 sends a detection signal to the controller, and the controller issues a stop control instruction to the second electric push rod 31 after receiving the detection signal of the second photoelectric sensor 81, so as to stop the movement of the second electric push rod 31, thereby ensuring that the locking shaft 42 is opposite to the locking hole.

[0062] Further, after the detection end of the second photoelectric sensor 81 identifies the positioning block 83 and the second electric push rod 31 is in a stopped state, the controller controls the first electric push rod 41 to start working, and the output shaft of the first electric push rod 41 drives the locking shaft 42 to move towards the locking hole. At this time, the detection end of the first photoelectric sensor 43 identifies the reference block 423, and when the detection end of the first photoelectric sensor 43 detects that the reference block 423 is away from the detection end of the first photoelectric sensor 43 and the detection end of the first photoelectric sensor 43 cannot detect the reference block 423, it indicates that the locking shaft 42 is located in the locking hole.

[0063] Referring to Figure 5 and Figure 8, the step compartment 21 is provided with a main drive assembly 6, the main drive assembly 6 comprises a third electric push rod 61, the third electric push rod 61 is electrically connected with the controller, and the third electric push rod 61 is used for driving the folding ladder 211 to unfold or shrink.

[0064] It should be noted that the folding ladder 211 located in the step compartment 21 mainly comprises a turnover connecting beam, a follow-up column, a hinge, a supporting arm and a connecting rod structure, which is a conventional folding ladder 211, and the specific working principle and the connection relationship of each component will not be repeated here.

[0065] Further, the main drive assembly 6 further comprises a base 62 and a connecting seat 63, the base 62 is installed at the bottom of the step compartment 21, the connecting seat 63 is installed at the first stage of the folding ladder 211, the base of the third electric push rod 61 is hinged with the base 62 through a pin shaft, and the output shaft of the third electric push rod 61 is hinged with the connecting seat 63 through a pin shaft, so that the output shaft of the third electric push rod 61 can smoothly drive the folding ladder 211 to unfold or shrink.

[0066] Correspondingly, the step compartment 21 is movably connected with a closing door 214, the folding ladder 211 is connected with the closing door 214, and the closing door 214 is provided with a locking piece 7, which is used for locking the closing door 214 to the step compartment 21.

[0067] The end of the closing door 214 close to the bottom of the step compartment 21 is hinged with the step compartment 21 through a hinge structure, so that the closing door 214 can rotate along the step compartment 21 with the hinge structure as the pivot.

[0068] Meanwhile, the last stage of the folding ladder 211 is connected with a connecting plate 14, and the connecting plate 14 is fixed on the closing door 214 through bolts.

[0069] Therefore, during the unfolding process of the folding ladder 211, the connecting rod structure of the folding ladder 211 drives the closing door 214 to rotate along the step compartment 21, so that the closing door 214 can follow the folding ladder 211 to move synchronously, achieving the purpose of unfolding along the step compartment 21 automatically, and during the folding process of the folding ladder 211, the closing door 214 can follow the connecting plate 14 to move synchronously until the closing door 214 is closed on the step compartment 21.

[0070] The locking piece 7 can be a turn tongue lock or a flat lock, and in other embodiments, a magnetic lock can be installed on the step compartment 21, and the magnetic lock is electrically connected with the controller. After the folding ladder 211 is folded, the controller controls the magnetic lock to be powered on, and the closing door 214 is attracted to the step compartment 21, achieving the purpose of double locking of the closing door 214 along the step compartment 21, improving the stability of the closing door 214 and the step compartment 21, effectively solving the problem that the closing door 214 is accidentally opened due to bumps or external forces during the driving of the motor home, and improving the safety performance of the motor home during driving.

[0071] Referring to Figure 1 and Figure 2 The main frame 2 above the step compartment 21 is provided with a sliding assembly 9, and the sliding assembly 9 is connected with a side expansion frame 10.

[0072] Specifically, the sliding assembly 9 includes a positioning sliding rail 91 and a guide wheel 92, wherein the guide wheel 92 is provided with four, the four guide wheels 92 are rotationally carried on the side expansion frame 10 in a rectangular array, and the positioning sliding rail 91 is installed with two groups, the two groups of positioning sliding rails 91 are symmetrically installed on both sides of the main frame 2 about the middle line of the length direction of the main frame 2, and the side expansion frame 10 can smoothly slide along the main frame 2 through the cooperation of the guide wheel 92 and the guide sliding rail 321.

[0073] In this embodiment, preferably, the side expansion frame 10 is locked with the main frame 2 through a lock pin structure, so that the user can pull out the side expansion frame 10 along the main frame 2, or fix the side expansion frame 10 on the main frame 2, and the side expansion frame 10 is beneficial to improve the expansion space of the motor home.

[0074] In addition, in order to improve the stability of the cooperation between the side expansion frame 10 and the main frame 2 during the driving of the motor home, a magnetic lock also needs to be installed on the main frame 2, and the user can control the electromagnetic lock to be powered on during the driving of the motor home, so as to attract the side expansion frame 10 to the main frame 2.

[0075] In another embodiment, referring to Figure 9 and Figure 10 The step compartment 21 and the main frame 2 are provided with a buffer assembly 13, the buffer assembly 13 includes a positioning cylinder 131 and a plug-in cylinder 132, and the plug-in cylinder 132 is in plug-in cooperation with the positioning cylinder 131. The positioning cylinder 131 is fixedly connected with the main frame 2 by welding, and the plug-in cylinder 132 is fixedly connected with the step compartment 21 by welding.

[0076] Specifically, the cross-sectional shape of the positioning cylinder 131 is U-shaped, and the diameter of the plug-in cylinder 132 is in a gap fit relationship with the inner diameter of the positioning cylinder 131, so that the plug-in cylinder 132 can be smoothly inserted into the positioning cylinder 131, or the plug-in cylinder 132 can be taken out along the positioning cylinder 131.

[0077] For the normal working state, the second electric push rod 31 is used to drive the step compartment 21 to move along the guide sliding rail 321, so as to realize the purpose of moving the step compartment 21 away from or close to the installation area 11 along the main frame 2; and in the actual use process, with the increase of the use time of the second electric push rod 31, the second electric push rod 31 may have mechanical failure, and if the power is suddenly lost during the contraction or extension of the output shaft of the second electric push rod 31, the output shaft of the second electric push rod 31 will quickly extend or contract.

[0078] Thus, in the initial state, the plug-in barrel 132 is located in the positioning barrel 131, when the output shaft of the second electric push rod 31 drives the step compartment 21 to move away from the first hinged seat 33, at this time, if the output shaft of the second electric push rod 31 loses power, at the moment when the output shaft of the second electric push rod 31 loses power, the step compartment 21 will continue to move away from the first hinged seat 33 under the action of inertial force, the plug-in barrel 132 will have a momentary inertial force to separate from the positioning barrel 131, but because the plug-in barrel 132 is located in the positioning barrel 131, when the plug-in barrel 132 tends to separate from the positioning barrel 131, the air pressure inside the positioning barrel 131 is lower than the air pressure outside the positioning barrel 131, so as to generate a damping force, and the plug-in barrel 132 is forced to be able to slowly slide out of the positioning barrel 131.

[0079] Similarly, when the output shaft of the second electric push rod 31 drives the step compartment 21 to move towards the first hinged seat 33, when the plug-in barrel 132 abuts against the positioning barrel 131, the plug-in barrel 132 can be inserted into the plug-in barrel 132, but when the plug-in barrel 132 is inserted into the positioning barrel 131, a damping force is also generated, so that the plug-in barrel 132 needs to be slowly inserted into the plug-in barrel 132, so as to avoid the impact of the step compartment 21 on the main frame 2.

[0080] Through the cooperation of the positioning barrel 131 and the plug-in barrel 132, the movement of the step compartment 21 along the main frame 2 is redundantly guaranteed, so as to avoid the case that the step compartment 21 moves due to inertial force and causes damage to the main frame 2 or the user when the second electric push rod 31 works abnormally.

[0081] In a second aspect, the application discloses a working method of a motor home side expansion platform mechanism, which is applied to the motor home side expansion platform mechanism as described in the first aspect and includes the following steps.

[0082] S1, the output shaft of the first electric push rod 41 drives the locking shaft 42 to move away from the locking hole along the main frame 2;

[0083] S2, the first photoelectric sensor 43 detects the position of the locking shaft 42;

[0084] S3, when the locking shaft 42 is separated from the locking hole, the output shaft of the second electric push rod 31 drives the step compartment 21 to slide along the main frame 2, and the output shaft of the third electric push rod 61 drives the folding ladder 211 to unfold along the step compartment 21;

[0085] S4, when the output shaft of the third electric push rod 61 reversely moves, the third electric push rod 61 drives the folding ladder 211 to fold along the step compartment 21, and the output shaft of the second electric push rod 31 drives the step compartment 21 to slide along the main frame 2;

[0086] S5, when the detection end of the second photosensor 81 faces the positioning block 83, the output shaft of the first electric push rod 41 drives the locking shaft 42 to move along the main frame 2 towards the locking hole until the locking shaft 42 is located in the locking hole.

[0087] The implementation principle of the motor home side expansion platform mechanism and the working method according to the embodiment of the application is as follows: when a user needs to extend the folding ladder 211 along the main frame 2, the main power supply is started, and the controller controls the first electric push rod 41 to start working, so that the locking shaft 42 is separated from the locking hole; at this time, the first photosensor 43 detects the position of the locking shaft 42 until the first photosensor 43 detects the reference block 423;

[0088] At the same time, the third electric push rod 61 synchronously drives the folding ladder 211 to move, so that the folding ladder 211 can be unfolded along the step compartment 21.

[0089] During the movement of the positioning block 83 along with the step compartment 21, when the detection end of the third photosensor 82 faces the positioning block 83, it indicates that the step compartment 21 has been slid out along the main frame 2, and the third photosensor 82 sends a detection signal to the controller, and the controller controls the third electric push rod 61 to stop working.

[0090] When the user needs to retract the folding ladder 211, the controller controls the output shaft of the third electric push rod 61 to move, so as to drive the folding ladder 211 to be retracted; at the same time, the controller controls the second electric push rod 31 to start working, and the output shaft of the second electric push rod 31 is retracted, so as to drive the step compartment 21 to move towards the first hinge seat 33.

[0091] Synchronously, the second photosensor 81 starts working to identify the positioning block 83, and when the positioning block 83 is located at the detection end of the second photosensor 81, the second photosensor 81 sends a detection signal to the controller, and the controller controls the second electric push rod 31 to stop working.

[0092] Subsequently, the controller controls the first electric push rod 41 to start working again, so that the first electric push rod 41 carries the locking shaft 42 to move towards the locking hole, so as to achieve the purpose of locking the step compartment 21, that is, even in the case of a bumpy road, through the cooperation of the locking shaft 42 and the locking hole, the step compartment 21 can be stably stopped on the main frame 2, which positively guides the stability of the step structure during the extension and contraction process of the motor home and improves the space utilization rate of the effective space of the motor home.

[0093] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A RV side extension platform mechanism, characterized in that: The vehicle includes a motorhome body (1) and a main frame (2) mounted on the motorhome body (1). A staircase (21) is slidably mounted on one end of the main frame (2) away from the motorhome body (1). A folding ladder (211) is installed inside the staircase (21). A lateral drive assembly (3) is mounted on the staircase (21). The lateral drive assembly (3) includes a second electric push rod (31). The base of the second electric push rod (31) is hinged to the main frame (2). The output shaft of the second electric push rod (31) is connected to the staircase (21). A locking assembly (4) is mounted on the main frame (2). The locking assembly (4) is used to lock the staircase (21) and the main frame (21) when the second electric push rod (31) is in its initial state. The main frame (2) is locked in place. The locking assembly (4) includes a first electric push rod (41), a locking shaft (42), and a first photoelectric sensor (43). The locking shaft (42) is movably connected to the output shaft of the first electric push rod (41). The stair car (21) has a locking hole through it along the thickness direction. When the transverse drive assembly (3) is in the initial state, the output shaft of the first electric push rod (41) drives the locking shaft (42) to move into the locking hole. The first photoelectric sensor (43) is used to detect whether the locking shaft (42) is located in the locking hole. A guide assembly (5) is provided on the main frame (2) near the locking shaft (42). The guide assembly (5) includes a guide seat (5). 1) and a guide sleeve (52) disposed within the guide seat (51). The inner diameter of the guide sleeve (52) is in a transition fit with the diameter tolerance of the locking shaft (42). A flat portion is provided on the locking shaft (42). A positioning rod is provided on the guide sleeve (52). When the locking shaft (42) is located within the guide sleeve (52), the positioning rod abuts against the flat portion. A buffer assembly (13) is provided between the step ladder car (21) and the main frame (2). The buffer assembly (13) includes a positioning cylinder (131) and a plug-in cylinder (132). The plug-in cylinder (132) is plugged into the positioning cylinder (131). When the plug-in cylinder (132) tends to disengage along the positioning cylinder (131), The air pressure inside the positioning cylinder (131) is lower than the air pressure outside the positioning cylinder (131) to generate a damping force, forcing the insertion cylinder (132) to slide out along the positioning cylinder. It also includes a lateral positioning component (8), which includes a second photoelectric sensor (81), a third photoelectric sensor (82), and a positioning block (83). The second photoelectric sensor (81) and the third photoelectric sensor (82) are arranged on the main frame (2) along the width direction of the step car (21), and the positioning block (83) is arranged on the step car (21). When the step car (21) is in the initial position along the main frame (2), the detection end of the second photoelectric sensor (81) faces the positioning block (83).

2. The RV side extension platform mechanism according to claim 1, characterized in that: The locking shaft (42) moves linearly along the guide sleeve (52).

3. The RV side extension platform mechanism according to claim 1, characterized in that: A closed door (214) is movably connected to the stair car (21). The folding ladder (211) is connected to the closed door (214). A locking member (7) is provided on the closed door (214). The locking member (7) is used to lock the closed door (214) to the stair car (21). The end of the closed door (214) near the bottom plate of the stair car (21) is hinged to the stair car (21) through a hinge structure. The last step of the folding ladder (211) is connected to a connecting plate (14). During the unfolding of the folding ladder (211), the linkage structure of the folding ladder (211) drives the closed door (214) to rotate along the stair car (21), so that the closed door (214) moves synchronously with the connecting plate (14).

4. The RV side extension platform mechanism according to claim 3, characterized in that: A magnetic lock is installed on the stair car (21). The magnetic lock is electrically connected to the controller. After the folding ladder (211) is folded, the controller controls the magnetic lock to be energized, so that the closed door is attracted to the stair car (21).

5. The RV side extension platform mechanism according to claim 1, characterized in that: The staircase (21) is equipped with a main drive assembly (6), which includes a third electric push rod (61) for driving the folding ladder (211) to unfold or retract.

6. The RV side extension platform mechanism according to claim 1, characterized in that: A sliding assembly (9) is provided on the main frame (2) located above the stair car (21), and the sliding assembly (9) is connected to the side extension frame (10).

7. A method for operating a RV side extension platform structure, applied to the RV side extension platform mechanism as described in claim 5, characterized in that, Includes the following steps: S1. The output shaft of the first electric push rod (41) drives the locking shaft (42) to move away from the locking hole along the main frame (2); S2. The first photoelectric sensor (43) detects the position of the locking shaft (42); S3. When the locking shaft (42) separates from the locking hole, the output shaft of the second electric push rod (31) drives the step ladder car (21) to slide along the main frame (2), and at the same time the output shaft of the third electric push rod (61) drives the folding ladder (211) to unfold along the step ladder car (21). S4. When the output shaft of the third electric push rod (61) moves in the opposite direction, the third electric push rod (61) drives the folding ladder (211) to fold along the step car (21). At the same time, the output shaft of the second electric push rod (31) drives the step car (21) to slide along the main frame (2). S5. When the detection end of the second photoelectric sensor (81) is facing the positioning block (83), the output shaft of the first electric push rod (41) drives the locking shaft (42) to move along the main frame (2) towards the locking hole until the locking shaft (42) is located in the locking hole.

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