A double-layer lifting mechanism for a recreational vehicle

Abstract

The utility model discloses a double -deck formula jacking mechanism for house car, including first lifting rod, second lifting rod, fixed link, first drive subassembly and second drive subassembly, first lifting rod, second lifting rod and fixed link are all axial through tubular structure, and second lifting rod slidingly is established in the fixed link, and first lifting rod slidingly is established in second lifting rod, and first drive subassembly is connected with first lifting rod, and utilizes first drive subassembly to control first lifting rod to move up and down, and second drive subassembly is connected with second lifting rod, and utilizes second drive subassembly to control second lifting rod to move up and down. The utility model discloses simple structure passes through the mode of first lifting rod, second lifting rod and fixed link sleeve connection, and provides power through two groups of drive subassembly, realizes the independent operation of first lifting rod and second lifting rod, and the structure is compact, and the occupied volume is small.

Description

Technical Field

[0001] This utility model relates to the field of expansion equipment, and in particular to a lifting mechanism for RVs. Background Technology

[0002] With the continuous development of self-driving tours, people are increasingly fond of driving RVs. However, most existing RVs are single-layer lift-up RVs, meaning that the top is raised after arriving at the destination to obtain more headroom. In pursuit of more space, double-layer RVs have been introduced, which have two lifting platforms on the upper part, and the height of the two lifting platforms can be adjusted independently. The current method is to drive them through two independent lifting mechanisms, but this will greatly occupy the interior space and has poor integration. Utility Model Content

[0003] To address the shortcomings of the existing technology, the main objective of this utility model is to overcome these deficiencies and disclose a double-layer lifting mechanism for RVs, comprising a first lifting rod, a second lifting rod, a fixed rod, a first drive assembly, and a second drive assembly. The first lifting rod, the second lifting rod, and the fixed rod are all axially continuous tubular structures. The second lifting rod is slidably disposed within the fixed rod, and the first lifting rod is slidably disposed within the second lifting rod. The first drive assembly is connected to the first lifting rod and controls the up-and-down movement of the first lifting rod. The second drive assembly is connected to the second lifting rod and controls the up-and-down movement of the second lifting rod.

[0004] Furthermore, the first drive assembly includes a first motor, a first reduction gearbox, a first screw, and a first moving block. The first motor is connected to the first reduction gearbox, which is disposed at the lower end of the fixed rod. The first screw is disposed within the fixed rod and extends into the first lifting rod. The first moving block is disposed on the first screw and threadedly engages with the first screw. The first screw is connected to the first reduction gearbox, and the first lifting rod is connected to the first moving block. The first motor drives the first reduction gearbox to rotate the first screw, and the first moving block drives the first lifting rod to move axially.

[0005] Furthermore, a bearing is provided at the end of the first screw, and the bearing is clearance-fitted with the inner wall of the first lifting rod.

[0006] Furthermore, the second drive assembly includes a second motor, a second reducer, a second screw, and a second moving block. The side wall of the fixed rod is radially recessed with a connecting hole communicating with the inner cavity. The second screw is disposed on the side wall of the fixed rod, and the second moving block is disposed on the second screw, with the second moving block threadedly engaged with the second screw. The second moving block passes through the connecting hole and is connected to the second lifting rod. The second motor is connected to the second screw through the second reducer, and drives the second screw through the second motor to move the second lifting rod via the second moving block.

[0007] Furthermore, a first bushing is provided at the lower end of the second lifting rod, and the first bushing contacts the inner wall of the fixed rod; a second bushing is provided at the upper end of the fixed rod, and the second bushing contacts the first lifting rod.

[0008] Furthermore, a third bushing is provided at the upper end of the second lifting rod, and the third bushing contacts the first lifting rod.

[0009] Furthermore, the upper ends of the first lifting rod and the second lifting rod are provided with fixed seats that are connected to the lifting plate.

[0010] The beneficial effects achieved by this utility model are:

[0011] This utility model has a simple structure. By connecting the first lifting rod, the second lifting rod, and the fixed rod together, and providing power through two sets of drive components, the independent operation of the first and second lifting rods is achieved. The structure is compact and occupies little space. Bushings are provided between the first lifting rod, the second lifting rod, and the fixed rod to reduce wear, increase service life, and withstand vibrations during operation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a double-layer lifting mechanism for a motorhome according to the present invention;

[0013] Figure 2 This is a front view of a double-layer lifting mechanism for a motorhome according to the present invention;

[0014] Figure 3 for Figure 2 Sectional view of AA;

[0015] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0016] Figure 5 for Figure 3 Enlarged view of B in the middle;

[0017] Figure 6 for Figure 3 Enlarged view of C;

[0018] Figure 7 This is a schematic diagram illustrating the usage of a double-layer lifting mechanism for a motorhome according to the present invention.

[0019] The attached figures are labeled as follows:

[0020] 1. First lifting rod; 2. Second lifting rod; 3. Fixed rod; 4. First drive assembly; 5. Second drive assembly; 6. Fixed seat; 21. First bushing; 22. Third bushing; 31. Connecting hole; 32. Second bushing; 41. First motor; 42. First gearbox; 43. First screw; 44. First moving block; 45. Bearing; 51. Second motor; 52. Second gearbox; 53. Second screw; 54. Second moving block; 91. First lifting plate; 92. Second lifting plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] A double-layer lifting mechanism for motorhomes, such as Figures 1-7 As shown, the device includes a first lifting rod 1, a second lifting rod 2, a fixed rod 3, a first drive assembly 4, and a second drive assembly 5. The first lifting rod 1, the second lifting rod 2, and the fixed rod 3 are all axially continuous tubular structures. The second lifting rod 2 is slidably disposed within the fixed rod 3, and the first lifting rod 1 is slidably disposed within the second lifting rod 2, thus allowing the first lifting rod 1 and the second lifting rod 2 to move independently up and down. The first drive assembly 4 is connected to the first lifting rod 1 and controls its up and down movement. The second drive assembly 5 is connected to the second lifting rod 2 and controls its up and down movement.

[0023] In one embodiment, such as Figures 1-7 As shown, the first drive assembly 4 includes a first motor 41, a first reduction gearbox 42, a first screw 43, and a first moving block 44. The first motor 41 is connected to the first reduction gearbox 42, which is located at the lower end of the fixed rod 3. The first screw 43 is located inside the fixed rod 3 and extends into the first lifting rod 1. The first moving block 44 is located on the first screw 43 and is threadedly engaged with the first screw 43. The first screw 43 is connected to the first reduction gearbox 42, and the first lifting rod 1 is connected to the first moving block 44. The first motor 41 drives the first reduction gearbox 42 to drive the first screw 43 to rotate, and the first moving block 44 drives the first lifting rod 1 to move axially.

[0024] In the above embodiments, such as Figures 1-7 As shown, a bearing 45 is provided at the end of the first screw 43, and the bearing 45 is clearance-fitted with the inner wall of the first lifting rod 1. The lower end of the first screw 43 is connected to the first reduction gearbox 42, and the upper end contacts the inner wall of the first lifting rod 1 through the bearing 45, which improves the stability of the first screw 43 and thus increases its service life.

[0025] In one embodiment, such as Figures 1-7 As shown, the second drive assembly 5 includes a second motor 51, a second reducer 52, a second screw 53, and a second moving block 54. The side wall of the fixed rod 3 is radially recessed with a connecting hole 31 communicating with the inner cavity. The second screw 53 is disposed on the side wall of the fixed rod 3. The second moving block 54 is disposed on the second screw 53 and is threadedly engaged with the second screw 53. The second moving block 54 passes through the connecting hole 31 and is connected to the second lifting rod 2. The second motor 51 is connected to the second screw 53 through the second reducer 52. The second motor 51 drives the second screw 53 to move the second lifting rod 2 through the second moving block 54.

[0026] In one embodiment, such as Figures 1-7 As shown, a first bushing 21 is provided at the lower end of the second lifting rod 2, which contacts the inner wall of the fixed rod 3; a second bushing 32 is provided at the upper end of the fixed rod 3, which contacts the first lifting rod 1. The arrangement of the first bushing 21 and the second bushing 32 makes the movement between the fixed rod 3 and the second lifting rod 2, and between the second lifting rod 2 and the first lifting rod 1, smoother and reduces wear on the first lifting rod 1, the second lifting rod 2, and the fixed rod 3. Typically, the bushings are made of nylon and non-metallic polymers. While reducing wear, they can also withstand vibration, preventing collisions between the lifting rod and the fixed rod during vehicle operation, thus avoiding damage and abnormal noise.

[0027] In one embodiment, such as Figures 1-7 As shown, a third bushing 22 is provided at the upper end of the second lifting rod 2, and the third bushing 22 contacts the first lifting rod 1. Similarly, the third bushing 22 is used to reduce the wear of the first lifting rod 1 and absorb vibration.

[0028] In one embodiment, such as Figures 1-7 As shown, the upper ends of the first lifting rod 1 and the second lifting rod 2 are provided with fixed seats 6 that are connected to the lifting plate.

[0029] When using this utility model, such as Figures 1-7As shown, the first lifting plate 91 is connected to the first lifting rod 1, and the second lifting plate 92 is connected to the second lifting rod 2. The first drive assembly 4 drives the first lifting rod 1 to move upward, thereby raising the height of the first lifting plate 91. At this time, the distance between the first lifting plate 91 and the second lifting plate 92 opens, thus expanding the second-floor space. The second drive assembly 5 controls the second lifting rod 2 to move upward, and the second lifting plate 92 to move upward, further expanding the height of the first floor. This allows for increasing the height of the first floor and expanding the second floor. Through the lifting mechanism of this invention, the two lifting plates can be independently controlled, and their heights can be adjusted according to actual needs.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A double-layer lifting mechanism for RVs, characterized in that, The device includes a first lifting rod, a second lifting rod, a fixed rod, a first drive assembly, and a second drive assembly. The first lifting rod, the second lifting rod, and the fixed rod are all axially continuous tubular structures. The second lifting rod is slidably disposed within the fixed rod, and the first lifting rod is slidably disposed within the second lifting rod. The first drive assembly is connected to the first lifting rod and controls the up and down movement of the first lifting rod. The second drive assembly is connected to the second lifting rod and controls the up and down movement of the second lifting rod.

2. The double-layer lifting mechanism for a motorhome according to claim 1, characterized in that, The first drive assembly includes a first motor, a first gearbox, a first screw, and a first moving block. The first motor is connected to the first gearbox, which is disposed at the lower end of the fixed rod. The first screw is disposed inside the fixed rod and extends into the first lifting rod. The first moving block is disposed on the first screw and threadedly engages with the first screw. The first screw is connected to the first gearbox, and the first lifting rod is connected to the first moving block. The first motor drives the first gearbox to rotate the first screw, and the first moving block drives the first lifting rod to move axially.

3. A double-layer lifting mechanism for a motorhome according to claim 2, characterized in that, A bearing is provided at the end of the first screw, and the bearing is clearance-fitted with the inner wall of the first lifting rod.

4. A double-layer lifting mechanism for a motorhome according to claim 1, characterized in that, The second drive assembly includes a second motor, a second reducer, a second screw, and a second moving block. The side wall of the fixed rod is radially recessed with a connecting hole communicating with the inner cavity. The second screw is disposed on the side wall of the fixed rod, and the second moving block is disposed on the second screw and threadedly engaged with the second screw. The second moving block passes through the connecting hole and is connected to the second lifting rod. The second motor is connected to the second screw through the second reducer, and drives the second screw through the second motor to move the second lifting rod through the second moving block.

5. A double-layer lifting mechanism for a motorhome according to claim 1, characterized in that, The lower end of the second lifting rod is provided with a first bushing, which contacts the inner wall of the fixed rod; the upper end of the fixed rod is provided with a second bushing, which contacts the first lifting rod.

6. A double-layer lifting mechanism for a motorhome according to claim 1, characterized in that, The upper end of the second lifting rod is provided with a third bushing, which contacts the first lifting rod.

7. A double-layer lifting mechanism for a motorhome according to claim 1, characterized in that, The upper ends of the first and second lifting rods are provided with fixed seats that are connected to the lifting plate.

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