Lifting safety structure and system

Abstract

The present application relates to the field of automobile technology, particularly to a lifting safety structure and system. The present application can be applied to a motor home roof lifting structure, specifically comprising: when the upper guide rail rises, the sliding block slides on the lower guide rail, so that the limiting piece contacts the blocking block, thereby making the bolt leave the limiting state, and then making the bolt fall into the pin hole, realizing mechanical locking of the sliding block, thereby completing mechanical fixing of the roof lifting structure, and improving the safety of the motor home roof lifting structure. In addition, when the lifting mechanism has been mechanically locked, the power module stops supplying power to the first connecting rod, which can further ensure that the first connecting rod will not be electrically telescopic, further ensuring that the motor home roof lifting mechanism will not suddenly drop or fall due to user misoperation or vehicle system failure, causing a safety accident; this implementation combines mechanical locking of the safety bolt and circuit control of the electronic control unit, improving the safety and stability of the motor home roof lifting structure from two aspects.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile technology, in particular to a lifting safety structure and system. BACKGROUND

[0002] At present, there is a kind of roof lifting house car on the market, which can make the roof rise and fall. As a kind of vehicle integrating living and traveling functions, the safety performance of the roof lifting mechanism of the roof lifting house car is directly related to the life and property safety of the user and the use reliability of the vehicle. The roof lifting mechanism of the existing roof lifting house car lacks necessary protection measures. In the case of user misoperation or vehicle system failure, the roof and the lifting mechanism may automatically descend. Such sudden situation not only causes the structure deformation and mechanical damage of the lifting mechanism, but also more likely causes serious personal injury to the people in the vehicle, thereby causing a safety accident. SUMMARY

[0003] The purpose of the present application is to provide a lifting safety structure and system to improve the safety of the roof lifting structure of the house car and solve the above technical problems.

[0004] In order to achieve the above purpose, the first aspect of the present application provides a lifting safety structure, comprising a scissor lifting mechanism, an upper guide rail and a lower guide rail. The scissor lifting mechanism comprises a first connecting rod and a second connecting rod. One end of the first connecting rod is connected with one end of the lower guide rail, and the other end of the first connecting rod is connected with the upper guide rail in a sliding manner. One end of the second connecting rod is connected with the lower guide rail in a sliding manner, and the other end of the second connecting rod is connected with one end of the upper guide rail in a shaft manner. The first connecting rod and the second connecting rod are connected in a shaft manner, and further comprise a sliding block, a pin and a limiting piece. The sliding block is connected with the pin and the limiting piece respectively, one end of the second connecting rod is connected with the sliding block in a shaft manner, and the sliding block is connected with the lower guide rail in a sliding manner. The limiting piece contacts the pin, thereby limiting the pin to be in a limiting state. The track of the lower guide rail is provided with a pin hole, and the side surface of the track of the lower guide rail is provided with a blocking block, which is located on one side of the pin hole. When the upper guide rail rises, the sliding block slides on the lower guide rail, so that the limiting piece contacts the blocking block, thereby making the pin leave the limiting state, and then making the pin fall into the pin hole, and realizing the mechanical locking of the sliding block.

[0005] The lifting safety structure can be applied to a motor home roof lifting structure, wherein the upper guide rail is connected to the roof to drive the roof to rise when the upper guide rail rises. Specifically, when the upper guide rail continuously rises, the first connecting rod and the second connecting rod rotate relative to the shaft connection position, and at this time, the sliding block continuously slides from one end of the lower guide rail to the other end of the lower guide rail; when the upper guide rail rises to the position, that is, the motor home roof rises to the position, the sliding block slides to the position above the pre-set pin hole of the lower guide rail; since the blocking block is located on one side of the pin hole, at this time, the limiting piece on the sliding block contacts the blocking block, so that the contact state of the limiting piece and the pin is changed, the pin is separated from the limiting state, and then the pin falls into the pin hole, so that the sliding block is mechanically locked at the pin hole and cannot continuously slide on the lower guide rail. Since the sliding block has been mechanically locked at the pin hole, one end of the second connecting rod is connected to the sliding block, and the other end of the second connecting rod is connected to one end of the upper guide rail, so that the second connecting rod is also mechanically locked and cannot rotate at this time, so that the mechanical locking of the scissor lifting mechanism is realized. At this time, the upper guide rail is also mechanically locked by the scissor lifting mechanism, so that the upper guide rail and the motor home roof cannot suddenly drop or fall due to user misoperation or vehicle system failure, so as to avoid safety accidents and improve the safety and stability of the lifting structure.

[0006] In a possible implementation, the limiting piece is a clamping rod, wherein when the clamping rod contacts the blocking block, the blocking block restricts the movement of the clamping rod to rotate the clamping rod, so that the pin is separated from the limiting state.

[0007] In this implementation, when the clamping rod contacts the blocking block, on the one hand, the blocking block produces a certain blocking action on one end of the clamping rod, and on the other hand, the sliding block continuously drives the movement of the clamping rod, so that the blocking block restricts the movement of the clamping rod to rotate the clamping rod. When the clamping rod rotates, the physical contact relationship between the clamping rod and the pin changes, so that the clamping rod cannot limit the pin any more, so that the pin is separated from the limiting state.

[0008] In a possible implementation, the lifting safety structure further includes a cross rod connected to the pin, wherein the clamping rod supports the cross rod to limit the pin; when the clamping rod contacts the blocking block, the blocking block restricts the movement of the clamping rod to rotate the clamping rod, so that the cross rod loses the support, and then the pin is separated from the limiting state.

[0009] In this implementation, the card position lever is located below the crossbar in the normal process, thereby supporting the crossbar to limit the drop of the bolt. When the card position lever rotates, the card position lever cannot support the crossbar to maintain the original position, so that the crossbar and the bolt gradually move downward under the action of gravity due to the rotation of the card position lever, and finally the bolt falls into the pin hole.

[0010] It should be further explained that the crossbar can also be used as a pull lever for a person. When the user needs to control the contact of the lifting mechanism with the mechanical lock, the crossbar can be manually controlled to be lifted up, so that the bolt is away from the pin hole, thereby the mechanical lock of the sliding block and the lifting mechanism is released. The above scheme realizes the release of the mechanical lock of the lifting mechanism by adding the step of human intervention, which can avoid the sudden release of the mechanical lock of the lifting mechanism in the case of vehicle system failure, thereby reducing the risk of accidents and improving the safety of the lifting mechanism.

[0011] In a possible implementation, the lifting safety structure further comprises a return spring, one end of the return spring is connected to the sliding block, and the other end of the return spring is connected to the card position lever, wherein: when the bolt is in the limiting state, the return spring generates a first torque to enable the card position lever to support the crossbar; when the card position lever contacts the blocking block, the blocking block restricts the movement of the card position lever, so that the card position lever rotates to overcome the first torque, thereby causing the crossbar to lose support, and further causing the bolt to be away from the limiting state.

[0012] In this implementation, the card position lever is located below the crossbar in the normal process, and the return spring generates a slight torque to enable the card position lever to support the crossbar and the bolt not to drop, thereby improving the stability of the lifting safety structure in the normal process. When the blocking block restricts the movement of the card position lever, the restraining force of the blocking block on the card position lever is greater than the torque of the return spring on the card position lever, thereby causing the card position lever to rotate to overcome the first torque.

[0013] In a possible implementation, the lifting safety structure further comprises: when the crossbar is lifted up, the bolt restores the limiting state, thereby causing the sliding block to release the mechanical lock, and further causing the return spring to generate a second torque to enable the card position lever to return.

[0014] In this implementation, when the user needs to control the contact of the lifting mechanism with the mechanical lock, the crossbar can be manually controlled to be lifted up, so that the bolt is away from the pin hole, thereby the mechanical lock of the sliding block and the lifting mechanism is released. At this time, the sliding block can slide on the lower guide rail again, the blocking block no longer applies a restraining force to the card position lever, so that the card position lever returns to the normal position under the action of the second torque of the return spring to support the crossbar again, thereby limiting the bolt.

[0015] In a possible implementation, the lifting safety structure further comprises a latch spring, one end of the latch spring being connected to the sliding block, and the other end of the latch spring being connected to the latch, wherein when the latch is out of the limiting state, the latch spring releases elastic force, and the latch is ejected into the pin hole under the action of the elastic force.

[0016] In this implementation, the latch spring is added, so that when the latch is out of the limiting state, the latch can be quickly ejected into the pin hole under the action of the elastic force of the latch spring, the speed of mechanical locking of the lifting safety mechanism is accelerated, the risk that the lifting mechanism cannot be timely locked is reduced, and the safety of the lifting safety mechanism is improved.

[0017] The second aspect of the present application provides a lifting safety system, comprising a master control module, and the master control module and the first connecting rod are electrically connected, wherein the master control module is used to control the first connecting rod to contract, so that the upper guide rail is lifted, the sliding block is driven to slide on the lower guide rail, the limiting piece contacts the blocking block, the latch is out of the limiting state, the latch falls into the pin hole, and the sliding block is mechanically locked.

[0018] The lifting safety system can be applied to a motor home roof lifting structure, wherein the upper guide rail can be connected to the roof, so as to drive the roof to rise when the upper guide rail rises. Specifically, the first connecting rod is an electric telescopic rod, when the master control module controls the first connecting rod to contract, the first connecting rod and the second connecting rod rotate relative to the shaft connection part, so as to realize continuous lifting of the upper guide rail. At this time, the sliding block continuously slides from one end of the lower guide rail to the other end of the lower guide rail; when the upper guide rail is lifted to the position, i.e., the motor home roof is lifted to the position, the sliding block slides to the position above the lower guide rail pin hole; since the blocking block is located on one side of the pin hole, at this time, the limiting piece on the sliding block contacts the blocking block, so as to change the contact state of the limiting piece and the latch, the latch is out of the limiting state, and the latch falls into the pin hole, so that the sliding block is mechanically locked at the pin hole and cannot continuously slide on the lower guide rail. Since the sliding block is mechanically locked at the pin hole, and one end of the second connecting rod is connected to the sliding block, and the other end of the second connecting rod is connected to one end of the upper guide rail, it is indicated that the second connecting rod is also mechanically locked and cannot rotate at this time, so as to realize mechanical locking of the scissor lifting mechanism. At this time, the upper guide rail is also mechanically locked by the scissor lifting mechanism, so as to ensure that the upper guide rail and the motor home roof cannot suddenly drop or fall due to user misoperation or vehicle system failure, and a safety accident is caused, and the safety and stability of the lifting structure are improved.

[0019] In a possible implementation, the lifting safety control system further comprises a power module and a first sensor; the power module is electrically connected with the main control module, the first connecting rod and the first sensor respectively; the first sensor is electrically connected with the main control module; the first sensor is fixed at the bottom of the pin hole, wherein: the power module is configured to output power to the main control module, the first connecting rod and the first sensor; the first sensor is configured to detect the plug pin and send a first signal to the main control module when the plug pin falls into the pin hole; and the main control module is further configured to receive the first signal to stop the power module from supplying power to the first connecting rod.

[0020] In this implementation, when the sensor detects that the plug pin is in the pin hole, it means that the lifting mechanism has been mechanically locked, and at this time, the power module is stopped from supplying power to the first connecting rod, which can further ensure that the first connecting rod cannot be electrically extended and retracted, further ensuring that the lifting safety mechanism cannot suddenly drop or fall due to user misoperation or vehicle system failure, causing a safety accident, and thus improving the safety and stability of the lifting structure. In addition, this implementation combines the mechanical locking of the safety plug pin and the circuit control of the electric control unit to ensure that the lifting safety mechanism cannot suddenly drop from two aspects, further improving the safety and stability of the lifting structure.

[0021] In a possible implementation, the lifting safety control system further comprises a second sensor, the second sensor is electrically connected with the main control module and the power module respectively; the second sensor is fixed above the sliding block, wherein: the power module is further configured to output power to the second sensor; the second sensor is configured to detect the plug pin and send a second signal to the main control module when the plug pin is in the limiting state; and the main control module is further configured to receive the second signal to enable the power module to resume supplying power to the first connecting rod.

[0022] In this implementation, when the sensor detects that the plug pin is in the limiting state, it means that the lifting mechanism has been mechanically unlocked, and at this time, the power module is enabled to resume supplying power to the first connecting rod, so that the first connecting rod can be electrically extended and retracted, thereby enabling the upper guide rail to perform the upward or downward action again. This implementation combines the mechanical locking of the safety plug pin and the circuit control of the electric control unit to control the lifting safety structure from two aspects, further improving the safety and stability of the lifting structure.

[0023] In a possible implementation, the master control module is further configured to receive the second signal, and after the power module resumes supplying power to the first connecting rod, the master control module is further configured to control the first connecting rod to extend, so that the upper guide rail is lowered, thereby driving the sliding block to slide on the lower guide rail, so that the limiting piece is away from the blocking block, and the limiting piece is reset.

[0024] The lifting safety structure and system provided by the application have at least the following advantages compared with the prior art: the application can be applied to a motor home lifting roof structure, and mechanical fixing of the lifting roof structure is completed by inserting a latch into a pin hole when the lifting roof structure is fully lifted, thereby improving the safety of the motor home lifting roof structure. In addition, when the lifting mechanism is mechanically locked, the power module stops supplying power to the first connecting rod, which can further ensure that the first connecting rod cannot be electrically extended and retracted, and further ensure that the motor home lifting mechanism cannot suddenly drop or fall due to user misoperation or vehicle system failure, thereby causing a safety accident. The implementation combines mechanical locking of the safety latch and circuit control of the electric control unit, and improves the safety and stability of the motor home lifting roof structure from two aspects. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of a lifting safety structure provided by an embodiment of the application;

[0026] Figure 2 is a circuit structure diagram of a lifting safety system provided by an embodiment of the application;

[0027] 1, a scissor lifting mechanism; 11, a first connecting rod; 12, a second connecting rod; 2, an upper guide rail; 3, a lower guide rail; 31, a pin hole; 32, a blocking block; 4, a lower sliding block; 41, a latch; 42, a limiting piece; 43, a crossbar; 44, a reset spring; 45, a latch spring; 5, an upper sliding block; 6, a first sensor; 7, a second sensor; 100, a master control module; 200, a power module. DETAILED DESCRIPTION

[0028] The application will be described in detail below with reference to the drawings and embodiments. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0029] The following detailed description is merely exemplary in nature and is intended to provide further detail on the application as described throughout this disclosure. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. This specification is well understood by those of ordinary skill in the art, and the present description is not to be construed as limiting the application. The terms "comprises," "comprising," "includes," "including," "has," "having," "contains" or "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional elements of the same type in the process, method, article, or apparatus. "Comprising" is to be interpreted as including the more restrictive terms "consisting of and "consisting essentially of.

[0030] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0031] To achieve the above object, the first aspect of the embodiments of the present application provides a lifting safety structure. Referring to Figure 1 , the lifting safety structure comprises a scissor lifting mechanism 1, an upper guide rail 2, a lower guide rail 3 and an upper sliding block 5; the scissor lifting mechanism 1 comprises a first connecting rod 11 and a second connecting rod 12; one end of the first connecting rod 11 is connected with one end of the lower guide rail 3 in an axis, the other end of the first connecting rod 11 is connected with the upper sliding block 5 in an axis, and the upper sliding block 5 is connected with the upper guide rail 2 in a sliding manner; one end of the second connecting rod 12 is connected with the lower guide rail 3 in a sliding manner, and the other end of the second connecting rod 12 is connected with one end of the upper guide rail 2 in an axis; the first connecting rod 11 and the second connecting rod 12 are connected in an axis, and further comprise a lower sliding block 4, a pin 41 and a limiting piece 42, wherein: the lower sliding block 4 is connected with the pin 41 and the limiting piece 42 respectively, one end of the second connecting rod 12 is connected with the lower sliding block 4 in an axis, and the lower sliding block 4 is connected with the lower guide rail 3 in a sliding manner; the limiting piece 42 contacts the pin 41, thereby limiting the pin 41 to be in a limiting state; the lower guide rail 3 is provided with a pin hole 31 on a track thereof, and a blocking block 32 is arranged on a side surface of the track of the lower guide rail 3, and the blocking block 32 is located on one side of the pin hole 31; when the upper guide rail 2 rises, the lower sliding block 4 slides on the lower guide rail 3, so that the limiting piece 42 contacts the blocking block 32, thereby making the pin 41 leave the limiting state, and further making the pin 41 fall into the pin hole 31, thereby realizing mechanical locking of the lower sliding block 4.

[0032] The lifting safety structure can be applied to a motor home roof lifting structure, wherein the upper rail 2 is connected to the roof of the motor home to drive the roof to rise when the upper rail 2 rises. Specifically, when the upper rail 2 continuously rises, the first connecting rod 11 and the second connecting rod 12 rotate relative to the shaft connection position, and at this time, the lower sliding block 4 continuously slides from one end of the lower rail 3 to the other end of the lower rail 3. When the upper rail 2 rises to the position, that is, the motor home roof rises to the position, the lower sliding block 4 slides to the position above the pin hole 31 of the lower rail 3. Since the blocking block 32 is located on one side of the pin hole 31, at this time, the limiting part 42 on the lower sliding block 4 contacts the blocking block 32, so as to change the contact state of the limiting part 42 and the pin 41, so that the pin 41 is out of the limiting state, and then the pin 41 falls into the pin hole 31, so that the lower sliding block 4 is mechanically locked at the pin hole 31 and cannot continuously slide on the lower rail 3. Since the lower sliding block 4 has been mechanically locked at the pin hole 31, one end of the second connecting rod 12 is connected to the lower sliding block 4, and the other end of the second connecting rod 12 is connected to one end of the upper rail 2, so that the second connecting rod 12 is also mechanically locked and cannot rotate at this time, so as to realize the mechanical locking of the scissor lifting mechanism 1. At this time, the upper rail 2 is also mechanically locked by the scissor lifting mechanism 1, so as to ensure that the upper rail 2 and the roof of the motor home cannot suddenly drop or fall due to user misoperation or vehicle system failure, so as to avoid safety accidents and improve the safety and stability of the lifting structure.

[0033] In a possible embodiment, the limiting part 42 is a clamping lever, wherein when the clamping lever contacts the blocking block 32, the blocking block 32 restricts the movement of the clamping lever to rotate the clamping lever, so that the pin 41 is out of the limiting state.

[0034] In this embodiment, when the clamping lever contacts the blocking block 32, on the one hand, the blocking block 32 produces a certain blocking effect on one end of the clamping lever, and on the other hand, the lower sliding block 4 continuously drives the movement of the clamping lever, so that the blocking block 32 restricts the movement of the clamping lever to rotate the clamping lever. When the clamping lever rotates, the physical contact relationship between the clamping lever and the pin 41 changes, so that the clamping lever cannot limit the pin 41 any more, so that the pin 41 is out of the limiting state.

[0035] In a possible embodiment, the lifting safety structure further comprises a cross rod 43 connected to the pin 41, wherein the clamping lever supports the cross rod 43 to limit the pin 41, and when the clamping lever contacts the blocking block 32, the blocking block 32 restricts the movement of the clamping lever to rotate the clamping lever, so that the cross rod 43 loses the support, and then the pin 41 is out of the limiting state.

[0036] In this embodiment, the card position lever is located below the horizontal bar 43 in the normal process, thereby supporting the horizontal bar 43 to limit the falling of the latch 41. When the card position lever rotates, the card position lever cannot support the horizontal bar 43 to maintain the original position, so that the horizontal bar 43 and the latch 41 gradually move downward under the action of gravity due to the rotation of the card position lever, and finally make the latch 41 fall into the pin hole 31.

[0037] It should be further pointed out that the horizontal bar 43 can also be used as a pull bar for people. When the user needs to control the contact of the lifting mechanism with the mechanical lock, the horizontal bar 43 can be manually controlled to be lifted up, so that the latch 41 is away from the pin hole 31, thereby the lower slide block 4 and the lifting mechanism are released from the mechanical lock. The above scheme realizes the release of the lifting mechanism from the mechanical lock by adding the step of human intervention, which can avoid the sudden release of the lifting mechanism from the mechanical lock in the case of vehicle system failure, thereby reducing the risk of accidents and improving the safety of the lifting mechanism.

[0038] In a possible embodiment, the lifting safety structure further comprises a return spring 44, one end of the return spring 44 is connected to the lower slide block 4, and the other end of the return spring 44 is connected to the card position lever, wherein: when the latch 41 is in the limiting state, the return spring 44 generates a first torque to make the card position lever support the horizontal bar 43; when the card position lever contacts the blocking block 32, the blocking block 32 restricts the movement of the card position lever, so that the card position lever rotates to overcome the first torque, thereby making the horizontal bar 43 lose support, and further making the latch 41 away from the limiting state.

[0039] In this embodiment, the card position lever is located below the horizontal bar 43 in the normal process, and the return spring 44 generates a slight torque to make the card position lever support the horizontal bar 43 and the latch 41 not to fall, thereby improving the stability of the lifting safety structure in the normal process. When the blocking block 32 restricts the movement of the card position lever, the restraining force of the blocking block 32 on the card position lever is greater than the torque of the return spring 44 on the card position lever, so that the card position lever rotates to overcome the first torque.

[0040] In a possible embodiment, the lifting safety structure further comprises: when the horizontal bar 43 is lifted up, the latch 41 restores the limiting state, thereby making the lower slide block 4 release the mechanical lock, and further making the return spring 44 generate a second torque to make the card position lever return.

[0041] In this embodiment, when the user needs to control the lifting mechanism to contact the mechanical lock, the horizontal rod 43 can be manually controlled to lift up, so that the latch 41 is away from the pin hole 31, and the lower sliding block 4 and the lifting mechanism are released from the mechanical lock. At this time, the lower sliding block 4 can slide on the lower guide rail 3 again, the blocking block 32 no longer exerts a restraining force on the detent lever, so that the detent lever returns to the normal position under the action of the second torque of the return spring 44, to support the horizontal rod 43 again and limit the latch 41.

[0042] In a possible embodiment, the lifting safety structure further comprises a latch spring 45, one end of the latch spring 45 being connected to the lower sliding block 4, and the other end of the latch spring 45 being connected to the latch 41, wherein: when the latch 41 is away from the limiting state, the latch spring 45 releases the elastic force, and then the latch 41 is ejected into the pin hole 31 under the action of the elastic force.

[0043] In this embodiment, by adding the latch spring 45, when the latch 41 is away from the limiting state, the latch 41 can be quickly ejected into the pin hole 31 under the action of the elastic force of the latch spring 45, thereby speeding up the speed of the mechanical lock of the lifting safety mechanism, reducing the risk that the lifting mechanism cannot be locked in time, and thereby improving the safety of the lifting safety mechanism.

[0044] Reference Figure 1 and Figure 2 The second aspect of the embodiment of the present application provides a lifting safety system, which comprises a master control module 100, and the master control module 100 and the first connecting rod 11 are electrically connected, wherein: the master control module 100 is used for controlling the first connecting rod 11 to contract, so that the upper guide rail 2 rises, thereby driving the lower sliding block 4 to slide on the lower guide rail 3, so that the limiting piece 42 contacts the blocking block 32, thereby making the latch 41 away from the limiting state, and then the latch 41 falls into the pin hole 31, to realize the mechanical lock of the lower sliding block 4.

[0045] The lifting safety system can be applied to a motor home roof lifting structure. The upper rail 2 is connected to the roof of the motor home to drive the roof to rise when the upper rail 2 rises. Specifically, the first connecting rod 11 is an electric telescopic rod. When the main control module 100 controls the first connecting rod 11 to retract, the first connecting rod 11 and the second connecting rod 12 rotate relative to the shaft connection part, thereby realizing the continuous rising of the upper rail 2. At this time, the lower sliding block 4 continuously slides from one end of the lower rail 3 to the other end of the lower rail 3. When the upper rail 2 rises to the position, i.e., the motor home roof rises to the position, the lower sliding block 4 slides to the upper side of the pin hole 31 of the lower rail 3. Since the blocking block 32 is located on one side of the pin hole 31, the limiting part 42 on the lower sliding block 4 contacts the blocking block 32 at this time, thereby changing the contact state of the limiting part 42 and the pin 41, making the pin 41 leave the limiting state, and further making the pin 41 fall into the pin hole 31, so that the lower sliding block 4 is mechanically locked at the pin hole 31 and cannot continue to slide on the lower rail 3. Since the lower sliding block 4 has been mechanically locked at the pin hole 31, the second connecting rod 12 is mechanically locked and cannot rotate at this time, thereby realizing the mechanical locking of the scissor lifting mechanism 1. At this time, the upper rail 2 is also mechanically locked by the scissor lifting mechanism 1, thereby ensuring that the upper rail 2 and the roof of the motor home will not suddenly drop or fall due to user misoperation or vehicle system failure, thereby improving the safety and stability of the lifting structure.

[0046] In a possible embodiment, the lifting safety control system further comprises a power module 200 and a first sensor 6; the power module 200 is electrically connected with the main control module 100, the first connecting rod 11 and the first sensor 6 respectively; the first sensor 6 is electrically connected with the main control module 100; the first sensor 6 is fixed at the bottom of the pin hole 31, wherein: the power module 200 is used for outputting power to the main control module 100, the first connecting rod 11 and the first sensor 6; the first sensor 6 is used for detecting the pin 41, thereby sending a first signal to the main control module 100 when the pin 41 falls into the pin hole 31; the main control module 100 is further used for receiving the first signal to stop the power module 200 from supplying power to the first connecting rod 11.

[0047] In this embodiment, the sensor detects that the latch 41 is located in the pin hole 31, which represents that the lifting mechanism has been mechanically locked, at this time, the power module 200 is stopped to supply power to the first connecting rod 11, which can further ensure that the first connecting rod 11 cannot be electrically extended and retracted, further ensuring that the lifting safety mechanism cannot suddenly drop or fall due to user misoperation or vehicle system failure, causing a safety accident, thereby improving the safety and stability of the lifting structure. In addition, this implementation combines the mechanical locking of the safety latch 41 and the circuit control of the electronic control unit, which further improves the safety and stability of the lifting structure from two aspects.

[0048] In a possible embodiment, the lifting safety control system further comprises a second sensor 7, which is electrically connected with the master control module 100 and the power module 200 respectively; the second sensor 7 is fixed above the lower sliding block 4, wherein: the power module 200 is further used to output power to the second sensor 7; the second sensor 7 is used to detect the latch 41, so as to send a second signal to the master control module 100 when the latch 41 is in the limiting state; the master control module 100 is further used to receive the second signal to make the power module 200 resume to supply power to the first connecting rod 11.

[0049] In this embodiment, the sensor detects that the latch 41 is in the limiting state, which represents that the lifting mechanism has been mechanically unlocked, at this time, the power module 200 resumes to supply power to the first connecting rod 11, so that the first connecting rod can be electrically extended and retracted, thereby enabling the upper rail 2 to perform the rising or lowering action again. This implementation combines the mechanical locking of the safety latch 41 and the circuit control of the electronic control unit, which further improves the safety and stability of the lifting structure from two aspects.

[0050] In a possible embodiment, after the master control module 100 receives the second signal to make the power module 200 resume to supply power to the first connecting rod 11, the master control module 100 is further used to control the first connecting rod 11 to be elongated, so as to make the upper rail 2 to be lowered, thereby driving the lower sliding block 4 to slide on the lower rail 3, making the limiting piece 42 away from the blocking block 32, so as to make the limiting piece 42 reset.

[0051] In a possible embodiment, when the initial condition is that the upper rail 2 is not raised, the sliding block 4 is located at the right distal end of the lower rail 3, the blocking block 32 is fixed on one side of the pin hole 31 of the lower rail 3, and the rotating elastic force of the reset spring 44 always acts on the limiting piece 42, so as to make the limiting piece 42 support the crossbar 43, thereby making the latch 41 fixedly lifted.

[0052] When the upper guide rail 2 needs to rise, the slider 4 slides from right to left, and when the position is fixed by the blocking block 32, the limiting piece 42 is blocked by the blocking block 32 to drive the limiting piece 42 to rotate counterclockwise gradually; after the limiting piece 42 rotates to a certain angle, the support of the cross bar 43 is lost, so that the cross bar 43 and the latch 41 are lowered in position under the elastic force of the latch spring 45, and finally when the pin hole 31 is reached, the latch 41 is just inserted into the pin hole 31 of the lower guide rail 3, the slider 4 stops sliding, the scissor lifting mechanism 1 stops moving, and the upper guide rail 2 stops rising.

[0053] When the upper guide rail 2 needs to rise, the slider 4 slides from right to left, and when the position is fixed by the blocking block 32, the limiting piece 42 is blocked by the blocking block 32 to drive the limiting piece 42 to rotate counterclockwise gradually; after the limiting piece 42 rotates to a certain angle, the support of the cross bar 43 is lost, so that the cross bar 43 and the latch 41 are lowered in position under the elastic force of the latch spring 45, and finally when the pin hole 31 is reached, the latch 41 is just inserted into the pin hole 31 of the lower guide rail 3, the slider 4 stops sliding, the scissor lifting mechanism 1 stops moving, and the upper guide rail 2 stops rising.

[0054] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0055] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, some improvements and replacements can be made without departing from the concept of the present application, and these improvements and replacements should also be considered as the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A lifting safety structure comprising a scissor lifting mechanism, an upper guide rail and a lower guide rail; the scissor lifting mechanism comprising a first connecting rod and a second connecting rod; one end of the first connecting rod and one end of the lower guide rail are connected by a shaft, the other end of the first connecting rod and the upper guide rail are connected by sliding; one end of the second connecting rod and the lower guide rail are connected by sliding, the other end of the second connecting rod and one end of the upper guide rail are connected by a shaft; the first connecting rod and the second connecting rod are connected by a shaft, characterized in that, The lifting safety structure further comprises a slider, a latch and a limiting piece, wherein: The slider is connected with the latch and the limiting piece respectively, one end of the second connecting rod is connected with the slider shaft, and the slider is slidingly connected with the lower guide rail; The limiting piece contacts the latch, thereby limiting the latch to make the latch in a limiting state; The lower guide rail is provided with a pin hole on the track, and the track side of the lower guide rail is provided with a blocking block, and the blocking block is located on one side of the pin hole; When the upper guide rail rises, the slider slides on the lower guide rail, so that the limiting piece contacts the blocking block, thereby making the latch leave the limiting state, and then making the latch fall and insert into the pin hole to realize mechanical locking of the slider.

2. The lift safety structure according to claim 1, wherein, The limiting piece is a clamping lever, wherein: When the clamping lever contacts the blocking block, the blocking block restricts the movement of the clamping lever to make the clamping lever rotate, thereby making the latch leave the limiting state.

3. The lift safety structure according to claim 2, wherein, The lifting safety structure further comprises a crossbar, and the crossbar is connected with the latch, wherein: The clamping lever supports the crossbar, thereby limiting the latch; When the clamping lever contacts the blocking block, the blocking block restricts the movement of the clamping lever to make the clamping lever rotate, thereby making the crossbar lose support, and then making the latch leave the limiting state.

4. The lift safety structure according to claim 3, wherein, The lifting safety structure further comprises a return spring, one end of the return spring is connected with the slider, and the other end of the return spring is connected with the clamping lever, wherein: When the latch is in the limiting state, the return spring generates a first torque to make the clamping lever support the crossbar; When the clamping lever contacts the blocking block, the blocking block restricts the movement of the clamping lever to make the clamping lever rotate against the first torque, thereby making the crossbar lose support, and then making the latch leave the limiting state.

5. The lift safety structure according to claim 4, wherein, The lifting safety structure further comprises: When the crossbar is lifted, the latch restores the limiting state, thereby making the slider release the mechanical locking, and then making the return spring generate a second torque to make the clamping lever return.

6. The lift safety structure according to claim 2, wherein, The lifting safety structure further comprises a latch spring, one end of the latch spring is connected with the slider, and the other end of the latch spring is connected with the latch, wherein: When the latch leaves the limiting state, the latch spring releases the elastic force, and then makes the latch pop out and insert into the pin hole under the action of the elastic force.

7. An elevator safety system characterized by, The lifting safety structure is suitable for the lifting safety structure of any one of claims 1 to 6, and comprises a master control module, wherein the master control module and the first connecting rod are electrically connected. The master control module is used to control the first connecting rod to contract, so that the upper guide rail rises to drive the slider to slide on the lower guide rail, so that the limiting piece contacts the blocking block, thereby making the latch leave the limiting state, and then making the latch fall and insert into the pin hole to realize mechanical locking of the slider.

8. A lift safety system according to claim 7, wherein, The lifting safety structure further comprises a power module and a first sensor; the power module is electrically connected with the master control module, the first connecting rod and the first sensor respectively; the first sensor and the master control module are electrically connected; and the first sensor is fixed at the bottom of the pin hole. The power module is configured to output power to the master module, the first connecting rod and the first sensor; The first sensor is configured to detect the plug pin and send a first signal to the master module when the plug pin falls into the pin hole; The master module is further configured to receive the first signal to stop the power module from supplying power to the first connecting rod.

9. A lift safety system according to claim 8, wherein, The second sensor is electrically connected to the master module and the power module, and is fixed above the sliding block, wherein: The power module is further configured to output power to the second sensor; The second sensor is configured to detect the plug pin and send a second signal to the master module when the plug pin is in the limiting state; The master module is further configured to receive the second signal to make the power module resume supplying power to the first connecting rod.

10. A lift safety system according to claim 9, wherein, After the master module receives the second signal to make the power module resume supplying power to the first connecting rod, the master module is further configured to: The master module is further configured to control the first connecting rod to extend, so that the upper guide rail falls, and the sliding block slides on the lower guide rail, so that the limiting piece moves away from the blocking block, and the limiting piece returns to the original position.

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