Lightweight electric adjusting supporting leg assembly for motor home

Abstract

The utility model discloses a light-weight electric adjusting supporting leg assembly for a motor home, and relates to the technical field of motor home supporting components. Comprising a supporting leg fixing seat fixedly connected with a motor home body floor; the lead screw sub-assembly comprises a lead screw body and a lead screw nut, the two ends of the lead screw body are connected with a first lead screw support and a second lead screw support respectively, and the periphery of the lead screw nut is sleeved with a third lead screw support; the lead screw reinforcing rod sub-assembly comprises lead screw reinforcing rod bodies which are symmetrically mounted on the lead screw sub-assembly; the supporting leg sub-assembly comprises a first traction bracket, a second traction bracket and a third traction bracket of which the end parts are connected together; the gear reducer sub-assembly comprises a gear reducer body, and the gear reducer body is connected with the lead screw body through a coupler; and the servo motor is connected with the gear reducer subassembly. The supporting leg assembly is reasonable in structure, time and labor are saved during operation, the supporting leg assembly can be matched with various motor home chassis structures, and the composite function of efficient leveling and stable supporting is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of RV support components, specifically to a lightweight electrically adjustable outrigger assembly for RVs. Background Technology

[0002] As a key component ensuring vehicle stability, the RV support system currently employs three main technical solutions: electrically adjustable outriggers, manually adjustable outriggers, and electric jacks. Existing technologies generally place the support devices at four locations on the vehicle: left front, right front, left rear, and right rear. Parking stability is achieved through the contact between the outriggers and the ground; for movement, the outriggers need to be raised off the ground. However, existing support systems still have significant technical shortcomings in terms of functionality and structural design:

[0003] The core drawback of manually adjustable outriggers is the lack of automated leveling. Operators need to manually adjust the height of each outrigger by observation and operation, resulting in low adjustment efficiency and poor leveling accuracy. In particular, it is difficult to achieve rapid vehicle leveling under complex terrain conditions, which seriously affects the user experience.

[0004] While existing electric adjustable outriggers improve operational convenience, they have the following structural defects in terms of technical implementation: (1) Insufficient functional redundancy, relying entirely on electric drive and lacking a manual emergency operation mode, posing a safety risk in the event of a power system failure; (2) Defects in the mechanical transmission design, where the motor load increases sharply due to the rigid contact of the mechanical structure when the end of the outrigger touches the ground, causing electrical system failures such as fuse blowout; (3) Insufficient integration of the power system, where the motor and cable need to move synchronously with the outrigger's moving parts, resulting in repeated bending of the cable causing insulation wear and poor contact; (4) Limited installation adaptability, requiring fixed installation based on the rigid structural components of the vehicle frame, making it difficult to adapt to the structural characteristics of different vehicle models.

[0005] Electric jacks have significant limitations in application: (1) Their volume and weight parameters exceed the standard, and they are only suitable for large-space vehicles such as C-type motorhomes. They pose a space encroachment problem for compact motorhomes; (2) Their chassis adaptability is poor, especially for towable motorhomes, where differences in chassis structure make it difficult to match the installation position; (3) Their mechanical linkage structure is defective. When using a dual-leg shared transmission mechanism, the movement of one leg will affect the state of the other leg through mechanical coupling, resulting in a reduction in the accuracy of vehicle posture control.

[0006] The aforementioned technical deficiencies result in existing RV support systems generally suffering from high operational complexity, low system reliability, and poor environmental adaptability, making it difficult to meet RV users' needs for rapid leveling, safety and stability, and adaptability to multiple scenarios. Utility Model Content

[0007] The purpose of this utility model is to provide a lightweight electric adjustable outrigger assembly for RVs, which has a reasonable structure, saves time and effort in operation, can be adapted to various RV chassis structures, and achieves a combination of efficient leveling and stable support.

[0008] To achieve the above objectives, this application proposes a lightweight electrically adjustable outrigger assembly for RVs, comprising:

[0009] Outrigger mounting brackets are securely connected to the floor of the RV body;

[0010] The lead screw assembly includes a lead screw body and a lead screw nut. The two ends of the lead screw body are respectively connected to a first lead screw support and a second lead screw support. A third lead screw support is sleeved on the outer periphery of the lead screw nut. The lead screw nut moves along the lead screw body between the first lead screw support and the second lead screw support.

[0011] The lead screw reinforcing rod sub-assembly includes lead screw reinforcing rod bodies symmetrically mounted on the lead screw sub-assembly;

[0012] The outrigger assembly includes a first traction bracket, a second traction bracket, and a third traction bracket connected at their ends. The first traction bracket is also connected to a third lead screw support. The second traction bracket is connected to the drive end of the outrigger fixing seat. The third traction bracket is connected to one end of the outrigger body, and the other end of the outrigger body is connected to the fixing end of the outrigger fixing seat.

[0013] The gear reducer assembly includes a gear reducer body, which is connected to a lead screw body via a coupling.

[0014] The servo motor is connected to the gear reducer sub-assembly.

[0015] In one embodiment, a hexagonal nut is provided at one end of the lead screw body. When the gear reducer assembly and / or servo motor fails, the hexagonal nut extends into the sleeve at the end of the spare manual crank handle.

[0016] In one embodiment, the servo motor is electrically connected to the terminal controller, which has four start / stop buttons for controlling the corresponding servo motors, and also has a button for controlling the simultaneous start / stop of all servo motors.

[0017] In one embodiment, one end of the lead screw body is connected to a first lead screw support via a first bearing, and the other end is connected to a second lead screw support via a second bearing. A first sealing ring is provided between the second bearing and the second lead screw support.

[0018] In one embodiment, the second bearing is provided with an inner ring limiting plug sleeved on the screw body, the second screw support is provided with an outer ring limiting plug, and a second sealing ring is provided between the second bearing and the inner ring limiting plug.

[0019] In one embodiment, a preload nut is provided on one side of the bearing outer ring limiting plug and sleeved on the lead screw body. The bearing outer ring limiting plug is fixed on the second lead screw support by a plug screw.

[0020] In one embodiment, the lead screw reinforcing rod body is disposed through the first lead screw support, the second lead screw support, and the third lead screw support, and is fixed on both sides by flange nuts.

[0021] In one embodiment, the ends of the first traction bracket, the second traction bracket, and the third traction bracket are connected by a first hinge pin, and the first traction bracket is also connected to the third lead screw support by the first hinge pin.

[0022] In one embodiment, the outrigger sub-assembly further includes an outrigger base, on which a transition shaft is provided, and the connecting end of the third traction bracket and the outrigger body is sleeved on the transition shaft.

[0023] In one embodiment, the gear reducer subassembly further includes a reducer bracket, a first fastener, and a second fastener. The reducer bracket is located at the drive end of the lead screw subassembly and is locked to the support leg fixing seat by the first fastener. The gear reducer body is installed on the outside of the reducer bracket by the second fastener, and the coupling is located on the inside of the reducer bracket.

[0024] The advantages of the above technical solution adopted in this utility model compared with the prior art are:

[0025] 1. The four outriggers of this application support synchronous automatic control and independent automatic control.

[0026] 2. The outrigger mounting base is connected to the vehicle floor at multiple points to reduce floor pressure and improve stability.

[0027] 3. It adopts a dual-degree-of-freedom combined ground support structure, which can adapt to ground conditions with different inclinations.

[0028] 4. When the gear reducer assembly and / or servo motor malfunction, a spare manual crank can be used for manual lifting and lowering adjustment. Attached Figure Description

[0029] Figure 1 A schematic diagram showing the support configuration of a lightweight electrically adjustable outrigger assembly for motorhomes.

[0030] Figure 2 A schematic diagram of the folded-down lightweight electrically adjustable outrigger assembly for motorhomes, including a spare manual crank.

[0031] Figure 3 A schematic diagram of the spare manual crank mechanism;

[0032] Figure 4 Schematic diagram of the outrigger mounting structure;

[0033] Figure 5 This is a schematic diagram of the lead screw sub-assembly structure;

[0034] Figure 6 This is a sectional view of the lead screw subassembly;

[0035] Figure 7 Isometric drawing of the lead screw subassembly;

[0036] Figure 8 This is a schematic diagram of the lead screw reinforcement sub-assembly structure;

[0037] Figure 9 This is a schematic diagram of the outrigger sub-assembly structure;

[0038] Figure 10 This is a magnified view of a portion of the outrigger subassembly structure;

[0039] Figure 11 This is a schematic diagram of the sub-assembly structure of a gear reducer.

[0040] The components include: 1. outrigger mounting base, 2. lead screw sub-assembly, 3. lead screw reinforcing rod sub-assembly, 4. outrigger sub-assembly, 5. coupling, 6. gear reducer sub-assembly, 7. servo motor, and 8. spare manual crank.

[0041] 11. First bolt;

[0042] 21. First lead screw support; 22. Third lead screw support; 23. Second lead screw support; 24. Lead screw nut; 25. Second bolt; 26. First bearing; 27. Second bearing; 28. First sealing ring; 29. ​​Second sealing ring; 210. Bearing outer ring limiting plug; 211. Plug screw; 212. Bearing inner ring limiting plug; 213. Preload nut; 214. Lead screw body; 215. Hexagonal nut;

[0043] 31. Lead screw reinforcing rod body; 32. Flange nut;

[0044] 41. Outrigger body; 42. Step screw; 43. First hinge pin; 44. First traction bracket; 45. Second traction bracket; 46. Third traction bracket; 47. Adapter shaft; 48. Outrigger base; 49. Second hinge pin;

[0045] 61. Gear reducer body; 62. Reducer bracket; 63. First fastener; 64. Second fastener. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0049] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] like Figure 1 As shown, this embodiment provides a lightweight electrically adjustable outrigger assembly for RVs, including:

[0052] outrigger mounting base, such as Figure 4 As shown, the outriggers are connected to the RV floor via multiple fastening points using the first bolt, ensuring a stable connection between the outriggers and the vehicle body and effectively distributing the stress.

[0053] Lead screw subassemblies, such as Figure 5-7 As shown, the system includes a lead screw body and a lead screw nut. The lead screw body is supported at both ends by a first lead screw support and a second lead screw support, respectively. A third lead screw support is fitted around the outer periphery of the lead screw nut and fixed by a second bolt. The lead screw nut can move along the lead screw body between the first and second lead screw supports. Preferably, one end of the lead screw body is connected to the first lead screw support via a first bearing, and the other end is connected to the second lead screw support via a second bearing. A first sealing ring is provided between the second bearing and the second lead screw support to effectively prevent dust and moisture from entering and extend the bearing's service life. An inner ring limiting cap fitted onto the lead screw body is provided on the outer side of the second bearing, and an outer ring limiting cap is provided on the outer side of the second lead screw support. A second sealing ring is provided between the second bearing and the inner ring limiting cap, forming a double-seal protection to further improve waterproof and dustproof performance. A preload nut fitted onto the lead screw body is provided on one side of the outer ring limiting cap, and the outer ring limiting cap is fixed to the second lead screw support by a cap screw, allowing adjustment of the bearing preload to ensure transmission accuracy.

[0054] Lead screw reinforcement sub-assembly, such as Figure 8 As shown, the assembly includes screw reinforcing rod bodies symmetrically installed on both sides of the screw sub-assembly. The screw reinforcing rod bodies are installed through the first screw support, the second screw support, and the third screw support, and are fixed on both sides by flange nuts to form a stable frame structure that effectively resists lateral forces.

[0055] Outrigger subassemblies, such as Figure 9-10 As shown, the system includes a first traction bracket, a second traction bracket, and a third traction bracket connected to each other, as well as an outrigger base. The first traction bracket is connected to a third lead screw support to transmit power. The second traction bracket is fixed to the drive end of the outrigger base by a stepped screw. The third traction bracket is connected to one end of the outrigger body, and the other end of the outrigger body is fixed to the fixed end of the outrigger base by a stepped screw, ensuring the stability and reliability of the outrigger during movement. Preferably, the outrigger base is provided with a transition shaft, and the connection end of the third traction bracket and the outrigger body is connected to the transition shaft by a second hinge pin, realizing adaptive contact between the outrigger and the ground and improving stability. The ends of the first traction bracket, the second traction bracket, and the third traction bracket are connected by a first hinge pin, and the first traction bracket is also connected to the third lead screw support by a first hinge pin. The hinged design makes the outrigger movement more flexible and adaptable to different working conditions.

[0056] Gear reducers are divided into assemblies, such as... Figure 11As shown, the device includes a gear reducer body, a reducer bracket, a first fastener, and a second fastener. The gear reducer body is connected to the lead screw body via a coupling to provide stable speed reduction transmission. The reducer bracket is located at the drive end of the lead screw sub-assembly and is locked to the support leg fixing seat by the first fastener. The gear reducer body is mounted on the outside of the reducer bracket via the second fastener, and the coupling is located on the inside of the reducer bracket. This layout is compact, has high transmission efficiency, and is easy to maintain.

[0057] Servo motor: Connected to the gear reducer sub-assembly, it provides precise power output. This servo motor supports ACC signal input and automatically retracts the outriggers upon ignition. It should be noted that: No-load phase: When the outriggers are not in contact with the ground, the servo motor drives rapid movement. Contact phase: When the outriggers just touch the ground, the servo motor switches to slow-descent mode to avoid impact. Support phase: During the process from ground contact to full support, the outriggers operate smoothly with a low motor load. Load-bearing phase: After the outriggers are fully supported, the lead screw sub-assembly experiences low torque, resulting in minimal structural deformation.

[0058] like Figure 2-3 As shown, a hexagonal nut is provided at one end of the lead screw body. When the gear reducer assembly and / or servo motor fails, the hexagonal nut can be inserted into the sleeve at the end of the spare manual crank handle to realize emergency manual operation and ensure the reliability of the outrigger.

[0059] As a preferred embodiment provided in this example, the servo motor is electrically connected to the terminal controller. The terminal controller is provided with four start / stop buttons that control the corresponding servo motors respectively, and also with a button that controls the start / stop of all servo motors at the same time, so as to realize the individual or synchronous control of the outriggers and improve the convenience of operation.

[0060] When the RV is parked, the operating terminal controller sends an electrical signal to the servo motor, driving it to rotate counterclockwise. The motor's rotation drives the gear reducer, converting high-speed, low-torque output into low-speed, high-torque output. This torque is transmitted to the lead screw sub-assembly via a coupling, driving the lead screw itself to rotate. During the rotation of the lead screw, the third lead screw support moves axially backward along the lead screw. This backward displacement of the third lead screw support causes the first traction bracket to generate a combined backward and downward motion, which in turn triggers the second traction bracket to move synchronously. Under the coordinated action of the first traction bracket, the second traction bracket, and the outrigger body, the third traction bracket exhibits a forward and downward trajectory. This coordinated process causes the adapter shaft and the outrigger base to extend forward and downward. When the outrigger base contacts the ground, the rotating joint design of the second hinge pin ensures complete contact between the base surface and the ground, providing stable support for the outrigger. When it is necessary to retract the outrigger, the terminal controller sends a reverse electrical signal to rotate the servo motor clockwise, allowing the outrigger to retract smoothly.

[0061] In addition, this design is equipped with an emergency manual operation scheme: in special circumstances such as power system failure, the outriggers can be manually adjusted using a backup manual crank to achieve the raising and lowering function, ensuring the reliability of the outrigger assembly under various working conditions.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A lightweight electrically adjustable outrigger assembly for RVs, comprising four electrically adjustable outriggers, characterized in that, Each electrically adjustable outrigger includes: Outrigger mounting brackets are securely connected to the floor of the RV body; The lead screw assembly includes a lead screw body and a lead screw nut. The two ends of the lead screw body are respectively connected to a first lead screw support and a second lead screw support. A third lead screw support is sleeved on the outer periphery of the lead screw nut. The lead screw nut moves along the lead screw body between the first lead screw support and the second lead screw support. The lead screw reinforcing rod sub-assembly includes lead screw reinforcing rod bodies symmetrically mounted on the lead screw sub-assembly; The outrigger assembly includes a first traction bracket, a second traction bracket, and a third traction bracket connected at their ends. The first traction bracket is also connected to a third lead screw support. The second traction bracket is connected to the drive end of the outrigger fixing seat. The third traction bracket is connected to one end of the outrigger body, and the other end of the outrigger body is connected to the fixing end of the outrigger fixing seat. The gear reducer assembly includes a gear reducer body, which is connected to a lead screw body via a coupling. The servo motor is connected to the gear reducer sub-assembly.

2. The lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, A hexagonal nut is pre-installed at one end of the lead screw body. When the gear reducer assembly and / or servo motor fails, the hexagonal nut extends into the sleeve at the end of the spare manual crank handle.

3. The lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, The servo motor is electrically connected to the terminal controller. The terminal controller is equipped with four start / stop buttons for controlling the corresponding servo motors, and also has a button for controlling the start / stop of all servo motors simultaneously.

4. The lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, One end of the lead screw body is connected to the first lead screw support via the first bearing, and the other end is connected to the second lead screw support via the second bearing. A first sealing ring is provided between the second bearing and the second lead screw support.

5. The lightweight electrically adjustable outrigger assembly for RVs according to claim 4, characterized in that, The second bearing is provided with an inner ring limiting plug sleeved on the outer side of the bearing and a bearing outer ring limiting plug sleeved on the outer side of the second screw support. A second sealing ring is provided between the second bearing and the bearing inner ring limiting plug sleeve.

6. The lightweight electrically adjustable outrigger assembly for RVs according to claim 5, characterized in that, The bearing outer ring limiting plug is provided with a preload nut that is sleeved on the lead screw body, and the bearing outer ring limiting plug is fixed on the second lead screw support by a plug screw.

7. The lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, The main body of the lead screw reinforcing rod is disposed through the first lead screw support, the second lead screw support, and the third lead screw support, and is fixed on both sides by flange nuts.

8. The lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, The ends of the first traction bracket, the second traction bracket, and the third traction bracket are connected by a first hinge pin, and the first traction bracket is also connected to the third lead screw support by the first hinge pin.

9. The lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, The outrigger sub-assembly also includes an outrigger base, on which a transition shaft is provided, and the connection end of the third traction bracket and the outrigger body is sleeved on the transition shaft.

10. A lightweight electrically adjustable outrigger assembly for RVs according to claim 1, characterized in that, The gear reducer subassembly also includes a reducer bracket, a first fastener, and a second fastener. The reducer bracket is located at the drive end of the lead screw subassembly and is locked to the support leg fixing seat by the first fastener. The gear reducer body is installed on the outside of the reducer bracket by the second fastener, and the coupling is located on the inside of the reducer bracket.

Images