Locking device of jacking mechanism and using method of locking device

Abstract

The invention provides a locking device of a jacking mechanism and a using method thereof.The locking device comprises first guiding pieces and second guiding pieces, the first guiding pieces are rotationally installed at the two ends of an upper support, each first guiding piece comprises a guiding rod arranged below the first guiding piece, and the second guiding pieces are fixed to the two ends of a lower support; the second guide piece is provided with a guide face and a guide groove, and the guide rod is driven by the jacking mechanism to move along the guide face and achieve locking of the jacking mechanism when entering the guide groove. When the guide rod is driven by the jacking mechanism to leave the guide groove and continue to move along the guide face, unlocking of the jacking mechanism is achieved. The technical problems that a lock catch of an existing touring car ceiling jacking mechanism needs to be manually unlocked or locked, operation is inconvenient, and reliability is poor are solved. The motor home lifting mechanism can be widely applied to motor home lifting mechanisms.

Description

Technical Field

[0001] This invention relates to a locking device and a method of using it, and more particularly to a locking device for a lifting mechanism and a method of using it. Background Technology

[0002] A motorhome is a special vehicle that integrates driving and living functions. Most motorhomes (such as Class C self-driving motorhomes) have a small living space due to their fixed cabin size. To improve the interior space of motorhomes, there is a type of motorhome on the market with a pop-up roof. Its feature is that the roof can be lowered when driving to reduce wind resistance and avoid exceeding the height limit; the roof can be raised when living to increase the longitudinal living space.

[0003] The raising and lowering of the RV roof is achieved through a lifting mechanism. To improve safety, the lifting mechanism needs to be locked when the RV is in motion or parked. Existing technologies generally use a latch to lock the lifting mechanism, but this method has the following problems:

[0004] 1. The latch is positioned too high, making manual unlocking or locking inconvenient;

[0005] Second, if the lifting mechanism is raised or lowered without being unlocked due to misoperation, it may easily cause structural damage. Summary of the Invention

[0006] This invention addresses the technical problem that existing RV roof lifting mechanisms require manual unlocking or locking, which is inconvenient and unreliable. It provides a locking device and its usage method for a lifting mechanism that can be unlocked or locked without manual operation, and which prevents lifting and lowering when locked, effectively avoiding overload problems.

[0007] Therefore, the technical solution of the present invention is a locking device for a lifting mechanism, comprising a first guide member and a second guide member. The first guide member is rotatably mounted at both ends of an upper support and includes a guide rod disposed below it. The second guide member is fixed at both ends of a lower support and has a guide surface and a guide groove. When the guide rod moves along the guide surface and enters the guide groove under the drive of the lifting mechanism, the lifting mechanism is locked. When the guide rod leaves the guide groove and continues to move along the guide surface under the drive of the lifting mechanism, the lifting mechanism is unlocked.

[0008] Preferably, the first guide further includes a connecting shaft, a connecting plate, and an elastic element. The connecting plate is fitted onto the connecting shaft, and each connecting plate has an elastic element on both sides. The two ends of each elastic element are connected to the connecting plate and the upper bracket, respectively. The elastic element is used to keep the connecting plate vertical in a free state.

[0009] Preferably, the first guide is provided with one at each end of the upper support, and the second guide is provided with two at each end of the lower support.

[0010] Preferably, the connecting plate is provided with a first shaft sleeve at each side of the connecting shaft, the upper support is provided with a through hole, the through hole is provided with a second shaft sleeve, the second shaft sleeve is sleeved between the connecting shaft and the first shaft sleeve, one end of the second shaft sleeve is provided with a boss, the boss is located outside the upper support, a fastener is screwed on the connecting shaft through the second shaft sleeve, the first shaft sleeve is used for axial positioning of the connecting plate, and the second shaft sleeve is used for preventing radial displacement of the first shaft sleeve and ensuring coaxiality of the connecting shaft and the first shaft sleeve.

[0011] Preferably, the elastic member is a tension spring.

[0012] Preferably, the second guide is provided with a first guide boss and a second guide boss, the first guide boss includes a first guide surface, a second guide surface and a third guide surface, the third guide surface is located between the first guide surface and the second guide surface, the second guide boss includes a fourth guide surface and a fifth guide surface, and the third guide surface and the fourth guide surface form the guide groove.

[0013] Preferably, the third guide surface includes a first sub-guide surface and a second sub-guide surface, and the fourth guide surface includes a third sub-guide surface and a fourth sub-guide surface.

[0014] The first guide surface, the first sub-guide surface, the second sub-guide surface and the second guide surface are sequentially connected, and the third sub-guide surface, the fourth sub-guide surface and the fifth guide surface are sequentially connected.

[0015] The first sub-guide surface and the second sub-guide surface are connected to the third sub-guide surface and protrude upward, which is called a first convex surface; the second sub-guide surface and the second guide surface are connected to the fourth sub-guide surface and protrude upward, which is called a second convex surface; and the third sub-guide surface and the fourth sub-guide surface are connected to the second sub-guide surface and protrude downward, which is called a third convex surface.

[0016] Preferably, the first guide surface includes an arc surface and a straight surface, the second guide surface includes two straight surfaces, and smooth transitions are adopted between each connected surface.

[0017] Preferably, the first guide surface includes two arc surfaces and two straight surfaces, the second guide surface includes three straight surfaces, and smooth transitions are adopted between each connected surface.

[0018] The application relates to a method for using a locking device of a lifting mechanism, which comprises a locking method and an unlocking method, and specifically comprises the following steps:

[0019] The locking method comprises the following steps:

[0020] S1: the lifting mechanism is controlled to descend, a guide rod contacts a first guide surface, a connecting plate is deflected, elastic elements on the side away from the first guide surface are stretched, the guide rod moves along a first sub-guide surface of the first guide surface and a third guide surface, when the guide rod moves to the bottom of the first sub-guide surface, the guide rod swings in a vertical direction under the action of the elastic elements and is blocked by a third convex surface;

[0021] S2: the lifting mechanism is controlled to ascend, when the guide rod passes the third convex surface, the guide rod continues to swing in the vertical direction under the action of the elastic elements and is blocked by a second convex surface, and the lifting mechanism continues to ascend until being reliably locked in a second sub-guide surface;

[0022] The unlocking method comprises the following steps:

[0023] S1: the lifting mechanism is controlled to descend, the guide rod moves along the second sub-guide surface and passes the second convex surface, the guide rod continues to descend to a fourth sub-guide surface through a guide groove and moves along the fourth sub-guide surface to a fifth guide surface;

[0024] S2: the lifting mechanism is controlled to ascend, the guide rod leaves the fifth guide surface and contacts the second guide surface, and the unlocking of the lifting mechanism is completed.

[0025] The application has the beneficial effects that,

[0026] (1) the first guide element and the second guide element are arranged on the upper support and the lower support of the lifting mechanism, and the two guide elements are matched with each other to realize automatic locking and unlocking under the lifting and driving of the lifting mechanism, the locking is reliable, and the unlocking is convenient;

[0027] (2) the first convex surface is arranged to ensure that the guide rod enters the guide groove, and the first convex surface and the second convex surface together ensure that the guide rod is reliably locked in the second sub-guide surface, and the third convex surface is arranged to ensure that the guide rod is blocked in the guide groove, so that the guide rod is prevented from directly swinging out of the guide groove under the action of the elastic elements;

[0028] (3) the elastic elements are arranged on the two sides of the connecting plate, so that the guide rod is better attached to the guide surface and quickly resets when being separated from the guide surface. DRAWINGS

[0029] Figure 1 is a combined structure schematic diagram of the embodiment 1 of the application;

[0030] Figure 2 is another combined structure schematic diagram of the embodiment 1 of the application;

[0031] Figure 3 isFigure 2 Local enlarged structure schematic view at I;

[0032] Figure 4 Figure 2 Local enlarged structure schematic view at II;

[0033] Figure 5 Explosion structure schematic view of the first guide in the embodiment 1 of the present application;

[0034] Figure 6 Schematic view of the second guide in the embodiment 1 of the present application;

[0035] Figure 7 Front view structure schematic view of the second guide in the embodiment 1 of the present application;

[0036] Figure 8 Working principle schematic view of the locking device in the embodiment 1 of the present application;

[0037] Figure 9 Figure 8 Local enlarged structure schematic view at III;

[0038] Figure 10 Working principle schematic view of the locking device in the embodiment 2 of the present application;

[0039] Figure 11 Schematic view of the second guide in the embodiment 2 of the present application;

[0040] Figure 12 Front view structure schematic view of the second guide in the embodiment 2 of the present application.

[0041] Explanation of symbols in the figure:

[0042] 1. Lifting mechanism; 11. Upper support; 12. Lower support; 13. Inclined support; 131. First inclined support; 132. Second inclined support; 2. First guide; 21. Connecting plate; 22. Guide rod; 23. Connecting rotation shaft; 24. First shaft sleeve; 25. Second shaft sleeve; 26. Elastic member; 27. Boss; 28. Fastener; 3. Second guide; 31. First guide boss; 311. First guide surface; 312. Second guide surface; 313. Third guide surface; 3131. First sub-guide surface; 3132. Second sub-guide surface; 3133. First convex surface; 3134. Second convex surface; 32. Second guide boss; 321. Fourth guide surface; 3211. Third sub-guide surface; 3212. Fourth sub-guide surface; 3213. Third convex surface; 322. Fifth guide surface; 33. Guide groove; 4. Driving device. DETAILED DESCRIPTION

[0043] The present application will be further described in conjunction with the embodiments.​​

[0044] Example 1

[0045] like Figures 1-2 As shown, the roof lifting mechanism 1 includes an upper support 11, a lower support 12, and an inclined support 13. The upper support 11 is fixedly connected to the canopy (not shown in the figure), the lower support 12 is fixedly connected to the roof cover (not shown in the figure), and the inclined support 13 is composed of a first inclined support 131 and a second inclined support 132 that are hinged together in the middle. The driving device 4 is located between the first inclined support 131 and the second inclined support 132. By driving the inclined support 13 to unfold or fold, the upper support 11 is raised or lowered relative to the lower support 12, thereby realizing the roof lifting function.

[0046] like Figures 1-5 As shown, a locking device for a lifting mechanism includes a first guide member 2 and a second guide member 3. The first guide member 2 is installed at both ends of the upper bracket 11 via a connecting shaft 23 and can rotate around the connecting shaft 23. The second guide member 3 is fixed at both ends of the lower bracket 12. Each end of the lower bracket 12 is provided with two second guide members 3. The second guide member 3 is made of nylon, which has strong wear resistance and long service life.

[0047] The first guide member 2 also includes a connecting plate 21, a guide rod 22, and an elastic member 26. The connecting plate 21 is fitted onto the connecting shaft 23. Each connecting plate 21 has an elastic member 26 on each side. The two ends of each elastic member 26 are connected to the connecting plate 21 and the upper bracket 11, respectively. The elastic member 26 is used to keep the connecting plate 21 vertical in a free state and to pull it back to its original position after it is freed from the constraint when the connecting plate 21 deflects. In this embodiment, the elastic member 26 is a tension spring. The guide rod 22 is located at the lower part of the connecting plate 21. Figure 5 As shown, a first bushing 24 is provided on each side of the connecting plate 21 on the connecting shaft 23. The upper bracket 11 is provided with a through hole, and a second bushing 25 is provided in the through hole. The second bushing 25 is sleeved between the connecting shaft 23 and the first bushing 24. One end of the second bushing 25 is provided with a boss 27, which is located on the outside of the upper bracket 11. The fastener 28 passes through the second bushing 25 and is screwed onto the connecting shaft 23. The first bushing 24 is used to realize the axial positioning of the connecting plate 21, and the second bushing 25 is used to prevent the radial displacement of the first bushing 24, so as to ensure the coaxiality of the connecting shaft 23 and the first bushing 24.

[0048] like Figures 6-7 As shown, the second guide member 3 includes a first guide boss 31, a second guide boss 32, and a guide groove 33. When the guide rod 22 moves along the guide surface and enters the guide groove 33 under the drive of the lifting mechanism 1, the lifting mechanism 1 is locked. When the guide rod 22 leaves the guide groove 33 and continues to move along the guide surface under the drive of the lifting mechanism 1, the mechanism is unlocked.

[0049] The first guide boss 31 includes a first guide surface 311, a second guide surface 312 and a third guide surface 313, with the third guide surface 313 located between the first guide surface 311 and the second guide surface 312; the second guide boss 32 includes a fourth guide surface 321 and a fifth guide surface 322, with the third guide surface 313 and the fourth guide surface 321 forming a guide groove 33.

[0050] The first guide surface 311 includes an arc surface and a straight surface; the second guide surface 312 includes two straight surfaces; the third guide surface 313 includes a first sub-guide surface 3131 and a second sub-guide surface 3132, the first sub-guide surface 3131 including a straight surface, and the second sub-guide surface 3132 including two straight surfaces and an arc surface; the fourth guide surface 321 includes a third sub-guide surface 3211 and a fourth sub-guide surface 3212, the third sub-guide surface 3211 including five straight surfaces and two curved surfaces, the fourth sub-guide surface 3212 including a straight surface; and the fifth guide surface 322 including a straight surface. All interconnected surfaces use smooth transitions. The composition of the above guide surfaces and sub-guide surfaces is not limited to the surfaces defined in this embodiment, but can also be any other combination that can achieve the guiding function.

[0051] The first guide surface 311, the first sub-guide surface 3131, the second sub-guide surface 3132, and the second guide surface 312 are connected in sequence, and the third sub-guide surface 3211, the fourth sub-guide surface 3212, and the fifth guide surface 322 are connected in sequence.

[0052] The junction of the first sub-guide surface 3131 and the second sub-guide surface 3132 protrudes towards the third sub-guide surface 3211, and is called the first convex surface 3133; the junction of the second sub-guide surface 3132 and the second guide surface 312 protrudes towards the fourth sub-guide surface 3212 and is located above the fourth sub-guide surface 3212, and is called the second convex surface 3134; the junction of the third sub-guide surface 3211 and the fourth sub-guide surface 3212 protrudes towards the second sub-guide surface 3132 and is located below the second sub-guide surface 3132, and is called the third convex surface 3213. The first convex surface 3133 ensures that the guide rod 22 enters the guide groove 33, and together with the second convex surface 3134, ensures that the guide rod 22 is reliably locked on the second sub-guide surface 3132. The third convex surface 3213 ensures that the guide rod 22 is blocked in the guide groove 33, preventing it from swinging directly out of the guide groove 33 under the action of the elastic element 26.

[0053] like Figure 8 As shown, a method for using a locking device of a lifting mechanism includes a locking method and an unlocking method, as detailed below:

[0054] The locking method is as follows:

[0055] S1: control the lifting mechanism 1 to descend, the guide rod 22 contacts the first guide surface 311, the connecting plate 21 is deflected, the elastic element 26 away from the first guide surface 311 side is stretched, the guide rod 22 moves along the first guide surface 311 and the first part guide surface 3131 of the third guide surface 313, when the guide rod 22 moves to the bottom of the first part guide surface 3131, the guide rod 22 swings to the vertical direction under the action of the elastic element 26, and is blocked by the third convex surface 3213;

[0056] S2: control the lifting mechanism 1 to ascend, when the guide rod 22 passes the third convex surface 3213, it continues to swing to the vertical direction under the action of the elastic element 26, and is blocked by the second convex surface 3134, and continues to ascend until it is reliably locked in the second part guide surface 3132.

[0057] As preferred, in the process of step S1 controlling the lifting mechanism 1 to continue to descend, the guide rod 22 contacts the third part guide surface 3211 of the fourth guide surface 321, and continues to move downward along the third part guide surface 3211, so that it can be reliably stopped above the third part guide surface 3211.

[0058] The unlocking method is as follows:

[0059] S1: control the lifting mechanism 1 to descend, so that the guide rod 22 moves along the second part guide surface 3132 and passes the second convex surface 3134, the guide rod 22 continues to descend to the fourth part guide surface 3212 through the guide groove 33, and moves along the fourth part guide surface 3212 to the fifth guide surface 322.

[0060] S2: control the lifting mechanism 1 to ascend, the guide rod 22 leaves the fifth guide surface 322 and contacts the second guide surface 312, and the unlocking of the lifting mechanism 1 is completed.

[0061] After the lifting mechanism 1 is unlocked, the guide rod 22 continues to move along the second guide surface 312, the connecting plate 21 is deflected, at this time the elastic element 26 away from the second guide surface 312 side is stretched, when the guide rod 22 moves away from the second guide surface 312, it swings to the vertical state under the action of the elastic element 26, at this time the guide rod 22 is located directly above the arc surface of the first guide surface 311, which facilitates the next locking.

[0062] The application realizes automatic locking and unlocking under the driving of the driving device 4 of the lifting mechanism 1 by arranging the first guide piece 2 and the second guide piece 3 on the upper support 11 and the lower support 12 of the lifting mechanism 1, which realizes reliable locking and convenient unlocking, solves the problem of inconvenient manual operation caused by high ceiling, and can effectively avoid structure damage caused by lifting without unlocking.

[0063] As shown in FIG. 1, the guiding rod 22 is in contact with the start point of the first guiding surface 311 in the initial contact state, and the arrangement can make the guiding rod 22 move downward along the first guiding surface 311, but not downward along the second guiding surface 312. Figure 9

[0064] Embodiment 2

[0065] The same points as Embodiment 1 are not repeated, and the difference is that, as shown in FIG. 2, the first guiding surface 311 includes two arc surfaces and two straight surfaces, and the second guiding surface 312 includes three straight surfaces, the arrangement of the first guiding surface 311 can prolong the fatigue life of the elastic member 26, and the arrangement of the second guiding surface 312 can increase the strength and wear resistance of the second convex surface 3134. Figures 10-12

[0066] The above is only a specific embodiment of the present application, and cannot limit the scope of the present application. The replacement of equivalent components or equivalent changes and modifications made within the scope of the patent protection of the present application shall still fall within the scope of the claims of the present application.​​

Claims

1. A locking device for a lift mechanism, characterized in that The first guide is rotatably installed at both ends of the upper support, and comprises a guide rod arranged below the first guide.

2. The locking device of a rising top mechanism according to claim 1, characterized in that, The first guide further comprises a connecting shaft, a connecting plate and an elastic member.

3. The locking device of a rise top mechanism according to claim 1, wherein The first guide is arranged at both ends of the upper support.

4. The locking device of a rise top mechanism according to claim 2, wherein The connecting shaft is provided with a first shaft sleeve at both sides of the connecting plate.

5. The locking device of a rise top mechanism according to claim 2, wherein The elastic member is a tension spring.

6. The locking device of a rise top mechanism according to claim 1, wherein The second guide is provided with a first guide boss and a second guide boss.

7. The locking device of a rise top mechanism according to claim 6, wherein The first guide boss comprises a first guide surface, a second guide surface and a third guide surface. The third guide surface and the fourth guide surface form the guide slot. The third guide surface comprises a first sub-guide surface and a second sub-guide surface.

8. The locking device of a rise mechanism according to claim 7, characterized in that The fourth guide surface comprises a third sub-guide surface and a fourth sub-guide surface.

9. The locking device of a rise top mechanism according to claim 7, wherein The first sub-guide surface and the second sub-guide surface are connected to the third sub-guide surface. The second sub-guide surface and the second guide surface are connected to the fourth sub-guide surface. The first sub-guide surface and the second sub-guide surface are connected to the third sub-guide surface. The second sub-guide surface and the second guide surface are connected to the fourth sub-guide surface. The first guide surface comprises an arc surface and a straight surface. The second guide surface comprises two straight surfaces. The first guide surface comprises two arc surfaces and two straight surfaces. The second guide surface comprises three straight surfaces.

10. A method of using the locking device of the lifting mechanism according to claims 7-9, characterized in that, The method for locking and the method for unlocking are as follows: The method for locking is as follows: S1: control the lifting mechanism to descend, after the guide rod contacts the first guide surface, the connecting plate is deflected, the elastic member away from the first guide surface side is stretched, the guide rod moves along the first guide surface and the first sub-guide surface of the third guide surface; when the guide rod moves to the bottom of the first sub-guide surface, the guide rod swings in the vertical direction under the action of the elastic member and is blocked by the third convex surface; S2: control the lifting mechanism to ascend, after the guide rod passes the third convex surface, the guide rod continues to swing in the vertical direction under the action of the elastic member and is blocked by the second convex surface, and continues to ascend until it is reliably locked in the second sub-guide surface; The method for unlocking is as follows: S1: control the lifting mechanism to descend, make the guide rod move along the second sub-guide surface and pass the second convex surface, the guide rod continues to descend to the fourth sub-guide surface through the guide groove and moves along the fourth sub-guide surface to the fifth guide surface; S2: control the lifting mechanism to ascend, the guide rod leaves the fifth guide surface and contacts the second guide surface, and the unlocking of the lifting mechanism is completed.

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