A recreational vehicle topper lift structure

Abstract

The utility model relates to the technical field of house car cover box, disclose a kind of house car cover box jacking structure, comprising: fixed shell, first telescopic shell and second telescopic shell, the fixed shell, first telescopic shell is slidably arranged inside, second telescopic shell is slidably arranged inside the first telescopic shell, the fixed shell bottom inner wall two sides are equipped with first drive motor and second drive motor, the first drive motor output shaft top is fixed with first screw rod, the second drive motor output shaft top is fixed with second screw rod, the utility model is through the integrated design of screw rod nut, sliding slot and reinforcing rib strip, simplify structure, reduce the number of components, avoid the space waste of traditional electric push rod up and down superposition;All components are arranged around nested telescopic core, and the space utilization is extremely high, while realizing two-stage jacking function, the installation space is greatly reduced, and the available space inside the house car cover box is maximized.

Description

Technical Field

[0001] This utility model relates to the field of RV kit technology, specifically an RV kit lifting structure. Background Technology

[0002] A RV pop-up roof is a retractable expansion structure installed on the roof of an RV. By adding one or more retractable boxes to the existing roof, the interior space is expanded vertically. When in motion, the overall height of the vehicle is lowered, making it easier to pass through height-restricted areas and enter underground parking garages. When parked, the roof is raised to increase standing space and create a bed, improving living comfort.

[0003] For example, an existing Chinese patent (CN221893021U) discloses an adjustable lifting structure for a motorhome, including a motorhome and a push rod mechanism. The first push rod is fixedly connected to the bottom of the housing. When the drive motor is started, it drives the first push rod to push upwards, pushing the housing up and down along the slide. Then, the servo motor is started, driving the first transmission rod to rotate. The first transmission rod drives the drive gear to rotate, and the drive gear meshes with the driven gear, thereby driving the driven gear to rotate. This causes the second transmission rod and the threaded push rod, which are fixedly connected to the upper end of the driven gear, to rotate simultaneously. The threaded push rod is threadedly connected to the threaded sleeve inside the second push rod, so the threaded push rod continuously lifts upwards. The threaded push rod is fixedly connected to the top lifting platform, and the top lifting platform can be moved up and down by controlling the forward and reverse rotation of the servo motor.

[0004] The existing RV cabin lifting structure uses two electric push rods positioned vertically to lift the RV cabin. However, the installation of these two electric push rods takes up a lot of space and encroaches on the space inside the RV cabin. Utility Model Content

[0005] The purpose of this utility model is to provide a RV roof lifting structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a RV cover lifting structure, comprising: a fixed outer shell, a first telescopic outer shell, and a second telescopic outer shell. The fixed outer shell has a first telescopic outer shell slidably mounted inside it, and the first telescopic outer shell has a second telescopic outer shell slidably mounted inside it. A first drive motor and a second drive motor are mounted on both sides of the bottom inner wall of the fixed outer shell. A first lead screw is fixed to the top of the output shaft of the first drive motor, and a second lead screw is fixed to the top of the output shaft of the second drive motor. A second lead screw nut is mounted on the outer side of the second lead screw, and a first lead screw nut is mounted on the outer side of the first lead screw. The outer wall of the second lead screw nut is fixed to the bottom end of the first telescopic outer shell. A support sleeve is fixed to the top of the first lead screw nut, and a top plate is fixed to the top of the support sleeve. The bottom of the top plate is fixed to the top of the second telescopic outer shell.

[0007] Furthermore, a lead screw seat plate is slidably provided inside the second telescopic housing. The lead screw seat plate is connected to the top of the second lead screw through a bearing. A through hole for supporting the tube sleeve to pass through is provided on one side of the lead screw seat plate.

[0008] Furthermore, a fixed base plate is fixed to the bottom end of the fixed outer shell, a first base plate is fixed to the bottom end of the first telescopic outer shell, and a second base plate is fixed to the bottom end of the second telescopic outer shell.

[0009] Furthermore, the bottom of the first base plate is fixed to the outer wall of the second lead screw nut, the outer wall of the first base plate is provided with a sliding groove, and the inner wall of the fixed housing is provided with reinforcing ribs that cooperate with the sliding groove of the first base plate.

[0010] Furthermore, the second base plate circumferential outer shell is provided with a sliding groove, and the inner wall of the first telescopic outer shell is provided with reinforcing ribs that cooperate with the sliding groove of the second base plate.

[0011] Furthermore, the outer wall of the first lead screw nut is fixed to the inner wall of the second telescopic housing.

[0012] Furthermore, the fixed outer shell, the first telescopic outer shell, and the second telescopic outer shell are all square tubes, and the external dimensions of the fixed outer shell, the first telescopic outer shell, and the second telescopic outer shell decrease sequentially.

[0013] Furthermore, an outer limiting flange is fixed to the top of the first telescopic outer shell, and the size of the outer limiting flange is larger than the outer contour size of the fixed outer shell.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model adopts a three-layer nested square tube structure consisting of a fixed outer shell, a first telescopic outer shell, and a second telescopic outer shell. The drive components, including the first drive motor and the second drive motor, as well as the transmission components, including the first lead screw and the second lead screw, are all built into the outer shell, eliminating any redundant external components. Through the integrated design of the lead screw nut, sliding groove, and reinforcing ribs, the structure is simplified, the number of components is reduced, and the space wasted by stacking electric push rods is avoided. All components are arranged around the nested telescopic core, resulting in extremely high space utilization. While achieving a two-stage lifting function, it significantly reduces the installation space occupied and maximizes the usable space inside the RV enclosure.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional view of the extended state of a RV roof lifting structure. Figure 2 This is a perspective view of the shortened state of the RV cover box lifting structure of this utility model; Figure 3 This is a front view of the internal structure of a motorhome elevating structure according to the present invention; Figure 4 This is a three-dimensional view of the internal structure of a RV cover lifting structure according to the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a half-sectional view of a RV cover box lifting structure according to the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point B.

[0017] In the diagram: 1. Fixed outer shell; 2. First telescopic outer shell; 3. Second telescopic outer shell; 4. Top plate; 5. Outer limiting flange; 6. Fixed base plate; 7. First drive motor; 8. Second drive motor; 9. First lead screw; 10. Support sleeve; 11. Lead screw seat plate; 12. Second lead screw; 13. First lead screw nut; 14. Second lead screw nut; 15. First base plate; 16. Second base plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1-7This utility model provides a technical solution: a RV roof-lifting structure, comprising: a fixed outer shell 1, a first telescopic outer shell 2, and a second telescopic outer shell 3. The fixed outer shell 1 has the first telescopic outer shell 2 slidably mounted inside it, and the first telescopic outer shell 2 has the second telescopic outer shell 3 slidably mounted inside it. The fixed outer shell 1 serves as a base support. The first telescopic outer shell 2 can slide along the inner wall of the fixed outer shell 1, and the second telescopic outer shell 3 can slide along the inner wall of the first telescopic outer shell 2, forming a two-section telescopic base. This nested structure eliminates the need for additional installation space, reducing the volume occupied at the structural level and freeing up more usable space inside the roof-lifting structure.

[0020] A first drive motor 7 and a second drive motor 8 are provided on both sides of the bottom inner wall of the fixed outer shell 1. A first lead screw 9 is fixed to the top of the output shaft of the first drive motor 7, and a second lead screw 12 is fixed to the top of the output shaft of the second drive motor 8. A second lead screw nut 14 is provided on the outside of the second lead screw 12, and a first lead screw nut 13 is provided on the outside of the first lead screw 9. The outer wall of the second lead screw nut 14 is fixed to the bottom end of the first telescopic outer shell 2. A support sleeve 10 is fixed to the top of the first lead screw nut 13, and a top plate 4 is fixed to the top of the support sleeve 10. The bottom of the top plate 4 is fixed to the top of the second telescopic outer shell 3. The first drive motor 7 drives the first lead screw 9 to rotate, which drives the first lead screw nut 13 to move up and down, and transmits power to the second telescopic outer shell 3 through the support sleeve 10 and the top plate 4. The second drive motor 8 drives the second lead screw 12 to rotate, which drives the second lead screw nut 14 to move up and down, and directly drives the first telescopic outer shell 2. Both the motor and the lead screw are built into the fixed housing 1. The power transmission is directly converted into telescopic motion through the lead screw and nut mechanism, eliminating the need for additional long-stroke electric push rods, greatly reducing the installation space occupied, and ensuring precise transmission and stable lifting.

[0021] The second telescopic housing 3 has a sliding lead screw seat plate 11 inside, which is connected to the top of the second lead screw 12 via a bearing. A through hole is provided on one side of the lead screw seat plate 11 to allow the support sleeve 10 to pass through. The lead screw seat plate 11 supports the top of the second lead screw 12 via the bearing, ensuring its rotational stability. Simultaneously, the through hole allows the support sleeve 10 to pass through, achieving spatial avoidance between the transmission path of the first lead screw 9 and the support structure of the second lead screw 12. This solves the spatial interference problem of dual lead screw transmission, allowing multiple components to be arranged in an orderly manner within a limited housing, further reducing the overall space occupied, and without affecting the independent operation of the two-stage lifting mechanism.

[0022] A fixed base plate 6 is fixed to the bottom end of the fixed outer shell 1, a first base plate 15 is fixed to the bottom end of the first telescopic outer shell 2, and a second base plate 16 is fixed to the bottom end of the second telescopic outer shell 3. The fixed base plate 6 fixes the bottom reference of the fixed outer shell 1, the first base plate 15 provides bottom support for the first telescopic outer shell 2, and the second base plate 16 provides bottom support for the second telescopic outer shell 3. The three are rigidly connected to the corresponding outer shells.

[0023] The bottom of the first base plate 15 is fixed to the outer wall of the second lead screw nut 14. The outer circumferential wall of the first base plate 15 has a sliding groove, and the inner wall of the fixed outer shell 1 has reinforcing ribs that mate with the sliding groove of the first base plate 15. The bottom of the first base plate 15 is fixed to the second lead screw nut 14, and its circumferential sliding groove slidably engages with the reinforcing ribs on the inner wall of the fixed outer shell 1. This provides guidance for the lifting and lowering of the first telescopic outer shell 2 and also enhances the rigidity of the fixed outer shell 1 through the reinforcing ribs. The guiding structure and the load-bearing structure are integrated, eliminating the need for additional guide components, saving space while ensuring smooth sliding of the first telescopic outer shell 2 and preventing jamming.

[0024] The second base plate 16 has a circumferential groove, and the inner wall of the first telescopic outer shell 2 has reinforcing ribs that mate with the groove of the second base plate 16. The circumferential groove of the second base plate 16 and the reinforcing ribs on the inner wall of the first telescopic outer shell 2 slide in contact, providing precise guidance for the lifting and lowering of the second telescopic outer shell 3. At the same time, the reinforcing ribs enhance the deformation resistance of the first telescopic outer shell 2. This design does not occupy additional space, ensures the precise extension and retraction of the second telescopic outer shell 3, and improves the stability of the overall lifting structure.

[0025] The outer wall of the first lead screw nut 13 is fixed to the inner wall of the second telescopic housing 3. Since the first lead screw nut 13 is directly fixed to the inner wall of the second telescopic housing 3, when the first lead screw 9 rotates, the linear motion of the lead screw nut directly drives the second telescopic housing 3 to rise and fall, eliminating intermediate redundant components in the power transmission. This reduces the number of components, lowers space requirements, improves transmission efficiency, and makes the lifting response of the second telescopic housing 3 more sensitive.

[0026] The fixed outer shell 1, the first telescopic outer shell 2, and the second telescopic outer shell 3 are all square tubes, and their external dimensions decrease sequentially. The fixed outer shell 1, the first telescopic outer shell 2, and the second telescopic outer shell 3 are all made of high-strength square tubes, and their external dimensions decrease sequentially to ensure that the three can be tightly nested without interference.

[0027] An outer limiting flange 5 is fixed to the top of the first telescopic outer shell 2. The outer limiting flange 5 is larger than the outer contour of the fixed outer shell 1. When the first telescopic outer shell 2 descends to its lowest position, the flange engages with the top of the fixed outer shell 1, limiting further descent. This achieves a travel limit function without adding extra space, preventing damage to components due to excessive extension and retraction, ensuring the safe operation of the two-stage lifting system, and not affecting the use of the internal space of the housing.

[0028] This utility model adopts a three-layer nested square tube structure consisting of a fixed outer shell 1, a first telescopic outer shell 2, and a second telescopic outer shell 3. All the driving components, such as the first drive motor 7 and the second drive motor 8, and the transmission components, such as the first lead screw 9 and the second lead screw 12, are built inside the outer shell, with no external redundant components. The integrated design of the lead screw nut, slide groove and reinforcing rib simplifies the structure, reduces the number of parts, and avoids the space waste of traditional electric push rods stacked on top of each other; all parts are arranged around the nested telescopic core, which makes extremely high space utilization. While realizing the two-stage lifting function, it greatly reduces the installation space occupied and maximizes the usable space inside the RV kit.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A RV roof lifting structure, comprising: A fixed outer shell (1), a first telescopic outer shell (2), and a second telescopic outer shell (3) are characterized in that: the fixed outer shell (1) has a first telescopic outer shell (2) slidably disposed inside, the first telescopic outer shell (2) has a second telescopic outer shell (3) slidably disposed inside, the bottom inner wall of the fixed outer shell (1) has a first drive motor (7) and a second drive motor (8) on both sides, the output shaft of the first drive motor (7) has a first lead screw (9) fixed at the top, the output shaft of the second drive motor (8) has a second lead screw (12) fixed at the top, the second lead screw (12) has a second lead screw nut (14) on the outside, the first lead screw (9) has a first lead screw nut (13) on the outside, the outer wall of the second lead screw nut (14) is fixed to the bottom end of the first telescopic outer shell (2), the first lead screw nut (13) has a support sleeve (10) fixed at the top, the support sleeve (10) has a top plate (4) fixed at the top, and the bottom of the top plate (4) is fixed to the top of the second telescopic outer shell (3).

2. The RV roof lifting structure according to claim 1, characterized in that: The second telescopic outer shell (3) has a sliding screw seat plate (11) inside. The screw seat plate (11) is connected to the top of the second screw (12) through a bearing. A through hole for supporting the tube sleeve (10) to pass through is provided on one side of the screw seat plate (11).

3. The RV roof lifting structure according to claim 1, characterized in that: The fixed outer shell (1) is fixed with a fixed base plate (6) at the bottom, the first telescopic outer shell (2) is fixed with a first base plate (15) at the bottom, and the second telescopic outer shell (3) is fixed with a second base plate (16) at the bottom.

4. The RV roof lifting structure according to claim 3, characterized in that: The bottom of the first base plate (15) is fixed to the outer wall of the second lead screw nut (14). The outer wall of the first base plate (15) is provided with a sliding groove. The inner wall of the fixed outer shell (1) is provided with reinforcing ribs that cooperate with the sliding groove of the first base plate (15).

5. The RV roof lifting structure according to claim 3, characterized in that: The second base plate (16) has a circumferential groove, and the inner wall of the first telescopic shell (2) has a reinforcing rib that cooperates with the groove of the second base plate (16).

6. The RV roof lifting structure according to claim 1, characterized in that: The outer wall of the first lead screw nut (13) is fixed to the inner wall of the second telescopic shell (3).

7. The RV roof lifting structure according to claim 1, characterized in that: The fixed outer shell (1), the first telescopic outer shell (2), and the second telescopic outer shell (3) are all square tubes, and the external dimensions of the fixed outer shell (1), the first telescopic outer shell (2), and the second telescopic outer shell (3) decrease sequentially.

8. The RV roof lifting structure according to claim 7, characterized in that: The top of the first telescopic shell (2) is fixed with an outer limiting flange (5), the size of which is larger than the outer contour size of the fixed shell (1).

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