Jacking mechanism for motor home

Abstract

The jacking mechanism comprises a vertical lead screw, a movable nut, a supporting rod, a guiding component and a driving component, the vertical lead screw and the guiding component are fixed to a carriage body, the movable nut and the vertical lead screw are in matched transmission, the two ends of the supporting rod are rotationally connected with the movable nut and a movable top respectively, and the driving component is arranged on the supporting rod. One end of the movable top is rotationally connected with the carriage body, the driving component drives the vertical lead screw to rotate relative to the carriage body, and the guiding component is matched with the movable nut and limits rotation of the movable nut. By the adoption of the technical scheme, large-angle rotation of the movable roof can be achieved, the structure is simple, work is reliable, and the market prospect is wide.

Description

Technical Field

[0001] The utility model relates to a lifting mechanism, and more specifically to a roof lifting mechanism for a recreational vehicle. Background Art

[0002] With the advancement of technology and the improvement of people's living standards, more and more people tend to travel and vacation in RVs. The main advantage of RVs is that they are not restricted by external transportation, accommodation, catering and other conditions. They can comprehensively solve the problems of transportation, accommodation, catering and other issues during the journey, giving people a sense of home, and at the same time they are also very economical.

[0003] However, a major problem with RVs, especially the most popular C-type self-driving RVs in China, is limited space. In particular, the fixed-size compartments are restricted by various factors and generally have small activity space and poor user experience. Therefore, people have designed expandable compartments, which can be expanded in width and height.

[0004] The expansion in the height direction is achieved by using a lifting mechanism. The existing lifting mechanism is commonly found in the X-shaped scissor lifting mechanism, which is often used for vertical lifting mechanisms. Its lifting distance is limited (within 80cm), and its structure is complex and costly. The driving force arm is small at startup and is easily damaged after long-term use. Another solution is to use multiple electric push rods, which can be used for vertical lifting or rotating lifting mechanisms, but their synchronous control is difficult and costly. When used for rotating lifting mechanisms, it is not suitable for large-angle rotation because of the difficulty in compensating for horizontal displacement during rotation.

[0005] In summary, there is an urgent need to develop a roof-lifting mechanism for RVs to solve the above-mentioned technical problems. Summary of the invention

[0006] In view of this, the utility model provides a roof-lifting mechanism for a motorhome, which can be applied to both a self-propelled caravan and a caravan trailer, has the advantages of a long lever arm, a simple and reliable structure, a high roof-lifting height, and the ability to self-lock, and can at least partially solve the problems existing in the prior art. In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0007] A roof raising mechanism for a motor home comprises a vertical screw, a movable nut, a support rod, a guide component and a driving component, wherein the vertical screw and the guide component are fixed to a car body, the movable nut and the vertical screw cooperate for transmission, the two ends of the support rod are rotatably connected to the movable nut and the movable top respectively, one end of the movable top is rotatably connected to the car body, the driving component drives the vertical screw to rotate relative to the car body, and the guide component and the movable nut cooperate to limit the rotation of the movable nut.

[0008] Furthermore, the guide component is a long, thin-walled hollow frame, a long slot is provided on one side of the guide component, the main body of the movable nut is arranged inside the guide component, and the movable nut is also provided with an integrally connected lug, which passes through the long slot of the guide component and is rotatably connected to one end of the support rod.

[0009] Furthermore, the upper and lower ends of the vertical screw are rotatably supported at the top and bottom of the guide component through bearings respectively.

[0010] As a preferred embodiment, there are two lifting mechanisms, which are respectively located on the left and right sides of the carriage body, and the vertical screws on the left and right sides move synchronously through the driving component.

[0011] As a preferred embodiment, the support rod is in a vertical state when the top is not raised.

[0012] As a preferred embodiment, the length of the support rod is substantially the same as the length of the vertical screw, and both are close to the height from the carriage floor to the movable roof.

[0013] As a further preference, the driving component is a synchronous belt drive mechanism.

[0014] Compared with the prior art, the utility model has the following obvious advantages:

[0015] 1. The lever arm only depends on the connection position of the support rod and the movable top. The lever arm is long, the moment is large, the lifting angle is large, and the lifting distance is long;

[0016] 2. Simple structure, reliable movement, multiple lifting mechanisms can easily achieve synchronous movement through driving components;

[0017] 3. The lead screw has a self-locking function and can stay at any position within the range of motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation of the utility model when the roof of a motorhome is raised (one side wall is omitted);

[0019] Figure 2 This is a schematic diagram of the overall structure of the utility model (before the top is raised);

[0020] Figure 3 This is a schematic diagram of the overall structure of the utility model (after the top is raised);

[0021] Figure 4 This is an enlarged view of the local structure of the utility model in which the guide components are omitted (during the lifting process);

[0022] Figure 5 This is a schematic diagram of the structure of the guide component of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the movable nut of the utility model. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 4 As shown, a roof raising mechanism 100 for a motor home comprises a vertical screw 110, a movable nut 120, a support rod 130, a guide component 140 and a driving component (the driving component is located below the floor of the carriage, not shown in the figure), the vertical screw 110 and the guide component 140 are fixed to the carriage body 200, the movable nut 120 and the vertical screw 110 cooperate for transmission, the two ends of the support rod 130 are rotatably connected to the movable nut 120 and the movable top 300 respectively, one end of the movable top 300 is rotatably connected to the carriage body 200, the driving component drives the vertical screw 110 to rotate relative to the carriage body 200, the guide component 140 and the movable nut 120 cooperate and limit the rotation of the movable nut 120.

[0027] like Figure 5 , Figure 6 As shown, the guide member 140 is a thin-walled hollow frame in an elongated strip shape, and its cross section is rectangular. A long slot 141 is provided on one side of the guide member 140. The main body of the movable nut 120 is arranged inside the guide member 140. The movable nut 120 is also provided with an integrally connected lug 121, which passes through the long slot 141 of the guide member 140 and is rotatably connected to one end of the support rod 130. Of course, the cross section of the guide member can also be circular or other shapes, as long as the rotation of the movable nut can be limited.

[0028] Furthermore, the upper and lower ends of the vertical screw 110 are rotatably supported at the top and bottom of the guide component 140 through bearings, respectively.

[0029] As a preferred embodiment, there are two lifting mechanisms 100, which are respectively located on the left and right sides of the carriage body 200, and the vertical screws 110 on the left and right sides move synchronously through the driving component. Two lifting mechanisms are provided to make the support more stable and avoid left and right swinging. As a further preferred embodiment, the driving component is a synchronous belt driving mechanism, which has the advantages of low noise, simple and reliable structure, etc.

[0030] As a preferred embodiment, the support rod 130 is in a vertical state when the top is not raised, so that the overall structure is more compact. As a further preferred embodiment, a protective frame can be set outside the support rod 130 and the guide member 140, which can prevent dust from entering and also has an aesthetic effect.

[0031] As a preferred embodiment, the length of the support rod 130 is substantially the same as that of the vertical screw 110, and both are close to the height from the carriage floor to the movable roof 300. This arrangement enables the movable roof 300 to rotate within a maximum range.

[0032] As a further preference, the driving component is a synchronous belt drive mechanism.

[0033] The working principle of the roof lifting mechanism of the utility model for RV is as follows:

[0034] When the top is raised, the vertical screw 110 is driven by the driving component to rotate in the guide component 140. Due to the restriction of the rotation direction by the guide component 140, the movable nut 120 moves upward along the guide component 140, thereby driving the support rod 130 to move, thereby pushing the movable top 300 to rotate around the car body 200, thereby realizing the inclined lifting of the movable top 300; when falling, the driving component rotates in the opposite direction, and the movement principle is the same, which will not be repeated.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above embodiments are only to illustrate the basic principles and characteristics of the utility model. The utility model is not limited by the above embodiments. Without departing from the spirit and scope of the utility model, the utility model has various changes and modifications, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A roof raising mechanism for a motorhome, characterized in that: It includes a vertical screw, a movable nut, a support rod, a guide component and a driving component. The vertical screw and the guide component are fixed to the car body. The movable nut and the vertical screw cooperate for transmission. The two ends of the support rod are rotatably connected to the movable nut and the movable top respectively. One end of the movable top is rotatably connected to the car body. The driving component drives the vertical screw to rotate relative to the car body. The guide component and the movable nut cooperate and limit the rotation of the movable nut.

2. A roof raising mechanism for a motorhome as claimed in claim 1, characterized in that: The guide component is a long, thin-walled hollow frame with a long slot on one side. The main body of the movable nut is arranged inside the guide component. The movable nut is also provided with an integrally connected lug, which passes through the long slot of the guide component and is rotatably connected to one end of the support rod.

3. A roof raising mechanism for a motorhome as claimed in claim 2, characterized in that: The upper and lower ends of the vertical lead screw are rotatably supported at the top and bottom of the guide component through bearings respectively.

4. A roof raising mechanism for a motorhome as claimed in claim 3, characterized in that: There are two lifting mechanisms, which are respectively located on the left and right sides of the carriage body, and the vertical lead screws on the left and right sides move synchronously through the driving component.

5. A roof raising mechanism for a motorhome as claimed in claim 4, characterized in that: When the top is not raised, the support rod is in a vertical state.

6. A roof raising mechanism for a motorhome as claimed in claim 5, characterized in that: The length of the support rod is substantially the same as that of the vertical lead screw, and both are close to the height from the floor of the carriage to the movable roof.

7. A roof raising mechanism for a motorhome as claimed in claim 6, characterized in that: The driving component is a synchronous belt driving mechanism.

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