A quick-release lifting mechanism

Abstract

The utility model provides a quick-release lifting mechanism, including an upper guide rail, a lower guide rail, and an X-shaped scissor-type lifting bracket installed between the upper guide rail and the lower guide rail, and also includes an electric push rod and a quick-release assembly, the quick-release assembly rotatably connects the fixed end of the electric push rod and the lifting bracket to one end of the lower guide rail, and includes a stepped shaft and fasteners and nuts detachably installed at both ends of the stepped shaft, and the driving end of the electric push rod is transmission-connected with the lifting bracket. By using a quick-release assembly provided with a stepped shaft and fasteners and nuts detachably installed at both ends of the stepped shaft, the electric push rod and the lifting bracket are rotatably connected to one end of the lower guide rail, and the stepped shaft can be pulled out by releasing the locking of the fasteners and nuts on either side, thereby realizing the quick-release function of the electric push rod and solving the problem of complex maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of flat roof lifting, in particular to a quick-release lifting mechanism. Background Art

[0002] With the continuous expansion of the RV market and the diversification of consumer demand, RVs with liftable roofs are becoming more and more popular among consumers. As a key component for realizing changes in the internal space of RVs, the design and technological progress of the RV flat roof lifting mechanism are of great significance to improving the comfort and convenience of RV use.

[0003] Chinese patent CN219056093U discloses an electric RV roof lifting mechanism with power assist, including a push rod device and a lifting bracket; the push rod device is connected to the lifting bracket; the lifting bracket includes an upper guide rail and a lower guide rail, and an X-shaped scissor-type lifting bracket is arranged between the upper guide rail and the lower guide rail; the push rod device includes a gas spring assembly, and the gas spring assembly is arranged on the X-shaped scissor-type lifting bracket. The utility model pushes the X-shaped scissor-type bracket by combining the gas spring assembly and the electric push rod, and utilizes the power assist of the gas spring and the thrust of the electric push rod to realize the electric lifting of the roof. The layout of this scissor-type bracket can effectively reduce the width of the electric lifting part, and lift a roof of a certain weight under the premise of overcoming the dead point of the lifting, and at the same time, the anti-pinch and adjustment functions can be realized through the circuit control of the push rod.

[0004] However, this technical solution has the following problems: the roof-lifting mechanism is generally installed at the edge of the roof, and the service life of the electric push rod in the mechanism is lower than that of the other components. In the existing structure, the rotational connection between the electric push rod, the lifting bracket and the lower guide rail is directly achieved by installing nuts at both ends of the shaft, and both sides need to be unlocked to separate the end of the electric push rod from the lifting bracket and the lower guide rail. Because one side of the lifting mechanism is arranged close to the facade of the car, the nut on the inside cannot be operated. Therefore, in order to replace the electric push rod, the entire mechanism needs to be disassembled, which is time-consuming, labor-intensive and complicated to repair. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the prior art and provide a quick-release lifting mechanism, which uses a quick-release assembly provided with a stepped shaft and fasteners and nuts detachably mounted at both ends of the stepped shaft to rotatably connect an electric push rod and a lifting bracket to one end of a lower guide rail, and the stepped shaft can be pulled out by releasing the lock of the fasteners and nuts on either side, thereby realizing the quick-release function of the electric push rod and solving the problem of complicated maintenance.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A quick-release lifting mechanism comprises an upper guide rail, a lower guide rail and an X-shaped scissor-type lifting bracket installed between the upper guide rail and the lower guide rail, and also comprises an electric push rod and a quick-release assembly. The quick-release assembly rotatably connects the fixed end of the electric push rod and the lifting bracket to one end of the lower guide rail, and comprises a stepped shaft and fasteners and nuts detachably installed at both ends of the stepped shaft. The driving end of the electric push rod is transmission-connected to the lifting bracket.

[0008] As a preference, steps are symmetrically arranged at both ends of the stepped shaft, and the fastener is sleeved on the steps, and comprises a limiting portion, an abutting portion and a connecting portion.

[0009] As a preference, the abutting portion abuts against the lower guide rail, and the connecting portion cooperates with the nut thread; the limiting portions of the nut and the fastener abut against the inner and outer side surfaces of the lower guide rail respectively.

[0010] As a preferred embodiment, the lifting bracket includes a first diagonal brace and a second diagonal brace, the first diagonal brace and the second diagonal brace are cross-rotatably connected, and the rotation connection point is located at the midpoint of the first diagonal brace and the second diagonal brace.

[0011] Preferably, the stepped shaft and the lifting bracket are connected to the end of the first diagonal strut, and a shaft sleeve group is provided on the stepped shaft, the shaft sleeve group includes a first shaft sleeve which is sleeved on the stepped shaft and the outer side surface is abutted against the first diagonal strut, and a second shaft sleeve which is sleeved on the outer side surface of the first shaft sleeve and the two end surfaces are axially abutted against the first diagonal strut and the electric push rod respectively.

[0012] Preferably, a spacer sleeve is abutted between the nut and the first sleeve.

[0013] As a preferred embodiment, threaded holes are coaxially formed at both ends of the stepped shaft, and plugging wires are installed in the threaded holes.

[0014] As a preferred embodiment, the ends of the first diagonal brace and the second diagonal brace located on the same side are rotatably connected to the lower guide rail and the upper guide rail respectively; the other ends of the first diagonal brace and the second diagonal brace are provided with guide wheels, the guide wheel of the first diagonal brace is slidably connected in the upper guide rail, and the guide wheel of the second diagonal brace is slidably connected in the lower guide rail.

[0015] As a preferred embodiment, fixed positions are respectively provided at both ends and the middle part of the lower guide rail, and a limit block is installed in the middle part of the guide wheel of the second diagonal support. The limit block moves between the fixed positions away from the quick-release assembly to limit the movement range of the guide wheel to limit the up and down movement range of the upper guide rail.

[0016] As a preferred embodiment, it also includes a gas spring assembly, the fixed end of the gas spring assembly is installed on the upper part of the first diagonal brace, the driving end of the electric push rod and the driving end of the gas spring assembly are respectively connected to both sides of the second diagonal brace, and the driving end of the electric push rod is connected above the midpoint of the second diagonal brace, and the driving end of the gas spring assembly is connected below the midpoint of the second diagonal brace.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model adopts the design of quick-release components, so that the connection between the electric push rod and the lifting bracket and the lower guide rail can be quickly installed and disassembled, which greatly improves the installation efficiency and the convenience of maintenance.

[0019] (2) The utility model ensures the stability and reliability of the connection through the connection structure composed of the stepped shaft, the fastener and the nut. The stepped design at both ends of the stepped shaft enables the fastener to be easily mounted and fixed thereon. At the same time, the fastener can be tightened or loosened by rotating the nut, which is simple and quick to operate.

[0020] (3) The utility model provides a first shaft sleeve and a second shaft sleeve to make the lifting mechanism more stable during lifting and lowering. The first diagonal brace and the second diagonal brace connected in a cross-rotating manner make the lifting process smooth and the force evenly distributed, thereby reducing shaking and noise during the lifting process.

[0021] (4) The utility model provides additional buffering and protection for the lifting process by setting up a gas spring assembly. When the electric push rod pushes the second diagonal support to rise, the gas spring assembly can provide a certain amount of assistance, reduce the load of the electric push rod, and extend its service life. The coordinated use of the electric push rod and the gas spring assembly can flexibly adjust the lifting speed and force according to actual needs to meet the use requirements under different working conditions.

[0022] In summary, the utility model has the advantages of quick disassembly and assembly, stability and reliability, easy operation, smooth lifting and lowering, accurate guiding, compact structure, etc., and is convenient to disassemble and assemble during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the quick-release assembly of the utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower guide rail of the utility model;

[0026] Figure 4 For this utility model Figure 3 The local enlarged schematic diagram of point I in the middle;

[0027] Figure 5 It is a schematic diagram of the main structure of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] Embodiment 1

[0031] like Figure 1-4 As shown, this embodiment provides a quick-release lifting mechanism, including an upper guide rail 1, a lower guide rail 2, and an X-shaped scissor-type lifting bracket 3 installed between the upper guide rail 1 and the lower guide rail 2, and also includes an electric push rod 4 and a quick-release assembly 5. The quick-release assembly 5 rotatably connects the fixed end of the electric push rod 4 and the lifting bracket 3 to one end of the lower guide rail 2, and includes a stepped shaft 51 and fasteners 52 and nuts 53 detachably installed at both ends of the stepped shaft 51. The driving end of the electric push rod 4 is transmission-connected with the lifting bracket 3 to drive the lifting bracket 3 to drive the upper guide rail 1 to move up and down. In this embodiment, it is only necessary to unlock the fasteners 52 and nuts 53 on either side to remove the stepped shaft 51 from one side using a tool.

[0032] Through the design of the quick-release assembly 5, the connection between the electric push rod 4 and the lifting bracket 3 and the lower guide rail 2 can be quickly installed and disassembled, which greatly improves the installation efficiency and the convenience of maintenance.

[0033] like Figure 2 As shown, the steps 511 are symmetrically arranged at both ends of the stepped shaft 51, and the fastener 52 is sleeved on the steps 511, and includes a limiting portion 521, an abutting portion 522, and a connecting portion 523. The abutting portion 522 abuts against the lower guide rail 2, and the connecting portion 523 is threadedly matched with the nut 53; the nut 53 and the limiting portion 521 of the fastener 52 abut against the inner and outer sides of the lower guide rail 2 respectively. The axial positioning of the stepped shaft 51 is completed by the threaded connection between the fastener 52 and the nut 53 at both ends of the stepped shaft 51, and the abutment of the fastener 52 with the step 511 of the stepped shaft 51.

[0034] The connection structure formed by the stepped shaft 51, the fastener 52 and the nut 53 ensures the stability and reliability of the connection. The step 511 design at both ends of the stepped shaft 51 allows the fastener 52 to be easily mounted and fixed thereon. At the same time, the fastener 52 can be tightened or loosened by rotating the nut 53, and the operation is simple and quick.

[0035] like Figure 1 , 2 As shown, the lifting bracket 3 includes a first diagonal support 31 and a second diagonal support 32, the first diagonal support 31 and the second diagonal support 32 are cross-rotatably connected, and the rotation connection point is located at the midpoint of the first diagonal support 31 and the second diagonal support 32. The stepped shaft 51 and the lifting bracket 3 are connected to the end of the first diagonal support 31, and the stepped shaft 51 is provided with a shaft sleeve group 54, the shaft sleeve group 54 includes a first shaft sleeve 541 sleeved on the stepped shaft 51 and the outer side surface of which abuts against the first diagonal support 31, and a second shaft sleeve 542 sleeved on the outer side surface of the first shaft sleeve 541 and the two end surfaces of which axially abut against the first diagonal support 31 and the electric push rod 4 respectively.

[0036] By providing the first shaft sleeve 541 and the second shaft sleeve 542, the lifting mechanism can be more stably operated during lifting and lowering. By cooperating with the first diagonal brace 31 and the second diagonal brace 32 that are cross-rotatably connected, the lifting process is smooth and the force is evenly distributed, thereby reducing shaking and noise during the lifting process.

[0037] like Figure 2 A spacer 55 is shown between the nut 53 and the first sleeve 541 to axially position the electric push rod 5 to prevent it from sliding. Threaded holes 512 are coaxially formed at both ends of the stepped shaft 51, and a plugging wire 56 is installed in the threaded hole 512 to prevent dust.

[0038] like Figure 1-4As shown, the ends of the first diagonal brace 31 and the second diagonal brace 32 located on the same side are rotatably connected to the lower guide rail 2 and the upper guide rail 1 respectively; the other ends of the first diagonal brace 31 and the second diagonal brace 32 are provided with guide wheels 33, the guide wheels 33 of the first diagonal brace 31 are slidably connected to the upper guide rail 1, and the guide wheels 33 of the second diagonal brace 32 are slidably connected to the lower guide rail 2. The lower guide rail 2 is provided with fixed positions 21 at both ends and the middle part, and a limiting block 34 is installed in the middle part of the guide wheel 33 of the second diagonal brace 32, and the limiting block 34 moves between the fixed positions 21 away from the quick release assembly 5, limiting the movement range of the guide wheel 33 to limit the up and down movement range of the upper guide rail 1.

[0039] Embodiment 2

[0040] like Figure 5 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: it also includes a gas spring assembly 6, the fixed end of the gas spring assembly 6 is installed on the upper part of the first diagonal brace 31, the driving end of the electric push rod 4 and the driving end of the gas spring assembly 6 are respectively connected to the two sides of the second diagonal brace 32, and the driving end of the electric push rod 4 is connected above the midpoint of the second diagonal brace 32, and the driving end of the gas spring assembly 6 is connected below the midpoint of the second diagonal brace 32.

[0041] By providing the gas spring assembly 6, additional buffering and protection are provided for the lifting process. When the electric push rod 4 pushes the second diagonal support 32 to rise, the gas spring assembly 6 can provide a certain amount of assistance, reduce the load of the electric push rod 4, and extend its service life. The coordinated use of the electric push rod 4 and the gas spring assembly 6 can flexibly adjust the lifting speed and force according to actual needs to meet the use requirements under different working conditions.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick-release lifting mechanism, comprising an upper guide rail, a lower guide rail, and an X-shaped scissor lift bracket installed between the upper guide rail and the lower guide rail, characterized in that: It also includes an electric push rod and a quick-release assembly. The quick-release assembly rotatably connects the fixed end of the electric push rod and the lifting bracket to one end of the lower guide rail. It includes a stepped shaft and fasteners and nuts that are detachably mounted on both ends of the stepped shaft. The driving end of the electric push rod is transmission-connected to the lifting bracket.

2. A quick-release lifting mechanism according to claim 1, characterized in that: Steps are symmetrically arranged at both ends of the stepped shaft, and the fastener is sleeved on the steps, and includes a limiting portion, an abutting portion and a connecting portion.

3. A quick-release lifting mechanism according to claim 2, characterized in that: The abutting portion abuts against the lower guide rail, and the connecting portion is threadably matched with the nut; the limiting portions of the nut and the fastener abut against the inner and outer side surfaces of the lower guide rail respectively.

4. A quick-release lifting mechanism according to claim 1, characterized in that: The lifting bracket includes a first diagonal brace and a second diagonal brace, wherein the first diagonal brace and the second diagonal brace are cross-rotatably connected, and a rotation connection point is located at a midpoint between the first diagonal brace and the second diagonal brace.

5. A quick-release lifting mechanism according to claim 4, characterized in that: The stepped shaft and the lifting bracket are connected to the end of the first diagonal support, and a shaft sleeve group is arranged on the stepped shaft, and the shaft sleeve group includes a first shaft sleeve which is sleeved on the stepped shaft and the outer side surface of which abuts against the first diagonal support, and a second shaft sleeve which is sleeved on the outer side surface of the first shaft sleeve and the two end surfaces of which abut axially against the first diagonal support and the electric push rod respectively.

6. A quick-release lifting mechanism according to claim 5, characterized in that: A spacer sleeve is abutted between the nut and the first shaft sleeve.

7. A quick-release lifting mechanism according to claim 3, characterized in that: The two ends of the stepped shaft are coaxially provided with threaded holes, and plugging wires are installed in the threaded holes.

8. A quick-release lifting mechanism according to claim 4, characterized in that: The ends of the first diagonal brace and the second diagonal brace located on the same side are rotatably connected to the lower guide rail and the upper guide rail respectively; the other ends of the first diagonal brace and the second diagonal brace are provided with guide wheels, the guide wheel of the first diagonal brace is slidably connected to the upper guide rail, and the guide wheel of the second diagonal brace is slidably connected to the lower guide rail.

9. A quick-release lifting mechanism according to claim 8, characterized in that: The lower guide rail is provided with fixed positions at both ends and in the middle, and a limit block is installed in the middle of the guide wheel of the second diagonal support. The limit block moves between the fixed positions away from the quick-release assembly to limit the range of movement of the guide wheel to limit the up and down movement range of the upper guide rail.

10. The quick-release lifting mechanism according to claim 4, characterized in that: It also includes a gas spring assembly, the fixed end of which is installed on the upper part of the first diagonal support, the driving end of the electric push rod and the driving end of the gas spring assembly are respectively connected to the two sides of the second diagonal support, and the driving end of the electric push rod is connected above the midpoint of the second diagonal support, and the driving end of the gas spring assembly is connected below the midpoint of the second diagonal support.

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