Vehicle-mounted double-drive lifting mechanism

Abstract

This utility model discloses a vehicle-mounted dual-drive lifting mechanism, belonging to the field of engineering machinery vehicle modification technology, to solve the technical problems of poor structure and operational stability, complex structure, and large size of existing vehicle-mounted lifting mechanisms. The vehicle-mounted dual-drive lifting mechanism of this utility model includes a base, folding arms, driving components, a guide assembly, and a mounting component. The folding arm includes a lower arm, an upper arm, and a folding pivot. The lower arm and upper arm are respectively hinged to the base and the mounting component, and the hinge pivots are parallel to the folding pivot. The two ends of the driving component are respectively hinged to the base and the lower arm. Two sets of folding arms and driving components are arranged opposite to each other. The distance between the two folding pivots is greater than the distance between the second ends of the two lower arms. The guide assembly can limit the synchronous unfolding or retraction of the two upper arms relative to the mounting component, enabling the two driving components to control the lifting and tilting angles of the mounting component. The lifting mechanism of this utility model has a stable structure, a high lift amplification ratio, and smooth and reliable operation.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery vehicle modification technology, and relates to a vehicle-mounted dual-drive lifting mechanism. Background Technology

[0002] The automatic lifting mechanism on the vehicle platform is used to raise the load of the equipment to a certain height for operation. During transportation or storage, it can be retracted into the vehicle, or even transported while still lifted. Currently, there are two main types of vehicle-mounted lifting mechanisms: those with X-shaped cross arms (scissor lift) and those with a telescopic sleeve-type linear push. Both can achieve vertical linear height adjustment.

[0003] The X-shaped crossarm (scissor lift) mechanism has the following shortcomings: When lifting in a stationary state, the sliding side of the X-shaped crossarm (scissor lift) mechanism will generate horizontal displacement, causing the center of gravity of the load to deviate from the center of the mechanism. The higher the lifting height, the greater the deviation, which is prone to instability and is not suitable for use under heavy loads. When lifting in a moving state, the X-shaped crossarm (scissor lift) mechanism requires rigid reinforcement measures such as strengthening the threaded tie rod and the sliding side locking mechanism to ensure stability during movement, resulting in a complex structure. Moreover, it is essentially a parallelogram mechanism with weak torsional resistance, which makes it very easy to cause swaying.

[0004] The sleeve-type linear push telescopic mechanism has the following shortcomings: When lifting in a stationary state, the sleeve-type linear push telescopic mechanism does not have a stroke amplification effect, and occupies a large height space in the initial state, which limits the effective lifting height; when lifting in a moving state, the sleeve-type linear push telescopic mechanism usually needs to be equipped with 2-4 guide columns to maintain stability. Although the structural rigidity is guaranteed, the volume and weight increase dramatically.

[0005] Furthermore, both the X-shaped crossarm (scissor lift) mechanism and the sleeve-type linear push telescopic mechanism have two or more sliding pairs, and the parallelism between the sliding pairs has high precision requirements; otherwise, jamming is very likely to occur. Moreover, when working on uneven ground, these two types of lifting mechanisms, because they only have adjustment in one dimension (height direction), require an additional independent leveling system or pitch mechanism for auxiliary compensation. Utility Model Content

[0006] Based on the above analysis, this utility model aims to provide a vehicle-mounted dual-drive lifting mechanism to solve the technical problems of poor structure and operational stability, complex structure and large size of existing vehicle-mounted lifting mechanisms.

[0007] The purpose of this utility model is mainly achieved through the following technical solutions.

[0008] This utility model provides a vehicle-mounted dual-drive lifting mechanism, characterized in that it includes a base, folding arms, driving components, a guide assembly, and a mounting component; the folding arms include a lower arm, an upper arm, and a folding pivot; the first ends of the lower arm and the upper arm are rotatably foldable via the folding pivot; the second ends of the lower arm and the upper arm are respectively hinged to the base and the mounting component, and the hinge axes are parallel to the folding pivot; the driving component is a linear actuator, one end of which is hinged to the base and the other end acts on the lower arm, enabling the lower arm to rotate around its hinge axis with the base; two sets of folding arms and driving components are arranged opposite to each other; the distance between the two folding pivots is greater than the distance between the second ends of the two lower arms; the guide assembly can limit the two upper arms to expand or retract synchronously relative to the mounting component, so that the two driving components can control the lifting and tilting angles of the mounting component.

[0009] Furthermore, the base forms a triangular connection structure at the hinge point with the lower arm and the drive component.

[0010] Furthermore, the guide assembly and the two upper arms form two synchronously sliding crank-slider mechanisms.

[0011] Furthermore, the guide assembly includes guide posts, which are fixed to the bottom of the mounting and vertically arranged on the symmetrical planes of the two upper arms.

[0012] Furthermore, the guide assembly also includes connecting rods and sliders; the sliders are slidably connected to the guide post, and the two ends of the two connecting rods are respectively hinged to the two upper arms and the slider.

[0013] Furthermore, the slider has a shaft-locking structure, which allows the lifting height of the mounting component to be locked.

[0014] Furthermore, the two drive components are located on the outside of the two lower arms.

[0015] Furthermore, the lower arm has a fork arm structure that is narrower at the top and wider at the bottom.

[0016] Furthermore, the two arms of the lower arm are hinged to the base via two coaxially arranged hinge lugs.

[0017] Furthermore, it also includes a drive controller, a stroke sensor, and a tilt sensor.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] 1. The vehicle-mounted dual-drive lifting mechanism of this utility model achieves a large effective lifting ratio within a limited space by setting two drive components to coordinate the unfolding and retraction of the two lower arms. This satisfies the requirements of minimizing the vertical space occupied during retraction and maximizing the effective lifting height under vehicle-mounted working conditions.

[0020] 2. The vehicle-mounted dual-drive lifting mechanism of this utility model, through the setting of guide components, realizes the synchronous extension and retraction of the two upper arms, and can accurately adjust the lifting and pitching attitude of the equipment load. It realizes the integrated and compact design of multi-degree-of-freedom motion control, and is especially suitable for dynamic leveling of vehicle-mounted equipment in complex terrain. It meets the adaptive leveling requirements of the installation parts when the vehicle is working on uneven ground, without the need for an additional independent leveling system. It has a compact structure, rapid response, and is suitable for operation in complex working conditions in vehicle environment.

[0021] 3. The vehicle-mounted dual-drive lifting mechanism of this utility model, by setting the distance between the two folding pivots to be greater than the distance between the second ends of the two lower arms, can avoid interference between the two folding arms when folding, thereby achieving a large lift amplification ratio in a limited space.

[0022] 4. The vehicle-mounted dual-drive lifting mechanism of this utility model forms a triangular connection structure at the hinge of the base, the lower arm 21 and the drive component 3, so that the drive component and the lower arm are arranged orthogonally opposite each other, thereby effectively strengthening the anti-sway and anti-torsion ability of the folding arm, so that the folding arm can maintain good stability in the moving state.

[0023] 5. The vehicle-mounted dual-drive lifting mechanism of this utility model forms two synchronously sliding crank-slider mechanisms with the guide assembly and the two upper arms. The simple structure makes it easy to ensure that the two upper arms always maintain synchronous movement during the extension and retraction process, avoiding structural jamming or load eccentricity caused by asynchronous movement.

[0024] 6. The vehicle-mounted dual-drive lifting mechanism of this utility model can transmit the tilt angle information of the mounting component to the drive controller in real time by setting a tilt sensor on the mounting component. The controller can then dynamically adjust the stroke of the two drive components according to a preset algorithm to achieve adaptive leveling during the lifting process.

[0025] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the vehicle-mounted dual-drive lifting mechanism in its fully lifted state according to an embodiment of the present utility model.

[0027] Figure 2 This is a structural schematic diagram of the vehicle-mounted dual-drive lifting mechanism in its fully retracted state according to an embodiment of the present utility model.

[0028] Figure 3 This is a top view of the base plate in an embodiment of the present invention.

[0029] Figure label:

[0030] 1-Base; 11-First hinge; 12-Second hinge; 13-Third hinge; 2-Folding arm; 21-Lower arm; 22-Upper arm; 23-Folding pivot; 3-Driver; 4-Guide assembly; 41-Guide post; 42-Connecting rod; 43-Slider; 5-Mounting component. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0032] Example 1

[0033] This embodiment provides a vehicle-mounted dual-drive lifting mechanism, such as... Figure 1 and Figure 2 As shown, the device includes a base 1, folding arms 2, a drive unit 3, a guide assembly 4, and a mounting component 5. The folding arm 2 includes a lower arm 21, an upper arm 22, and a folding pivot 23. The first ends of the lower arm 21 and the upper arm 22 are rotatably foldable via the folding pivot 23. The second ends of the lower arm 21 and the upper arm 22 are respectively hinged to the base 1 and the mounting component 5, with the hinge axes parallel to the folding pivot 23. The drive unit 3 is a linear actuator, with both ends hinged to the base 1 and the lower arm 21, thereby driving the lower arm 21 to rotate around its hinge axis with the base 1. The two sets of folding arms 2 and drive units 3 are arranged opposite to each other. The distance between the two folding pivots 23 is greater than the distance between the second ends of the two lower arms 21. The guide assembly 4 can limit the two upper arms 22 to expand or retract synchronously relative to the mounting component 5, allowing the two drive units 3 to control the lifting and tilting angles of the mounting component 5.

[0034] When using the vehicle-mounted dual-drive lifting mechanism of this embodiment, the equipment load is pre-fixed on the mounting component 5, which is typically equipped with a mounting platform or mounting clamp. Initially, the two drive components 3 are in a retracted state, so that both folding arms 2 are in a position where the upper arm 22 and the lower arm 21 are folded together. During operation, the two drive components 3 are activated to drive the two lower arms 21 to rotate in opposite directions, and the two upper arms 22 are synchronously extended under the limiting action of the guide component 4, thereby raising the mounting component 5. When the strokes of the two drive components 3 are synchronized, the two lower arms 21 rotate synchronously, and the two folding arms 2 are symmetrically extended, and the equipment load on the mounting component 5 is vertically lifted; when the strokes of the two drive components 3 are asynchronous, the two lower arms 21 rotate asynchronously, the folding arms are asymmetrically extended, and the mounting component 5 tilts accordingly under the constraint of the guide component 4, thereby adjusting the pitch angle of the equipment load on the mounting component 5. When the vehicle-mounted dual-drive lifting mechanism needs to be reset to its initial state, the two drive components 3 are reversed and retracted, which allows the folding arm 2 to gradually retract and return to its initial state, completing the descent and horizontal return.

[0035] The vehicle-mounted dual-drive lifting mechanism of this embodiment uses two drive components 3 to collaboratively control the unfolding and retraction of the two lower arms 21, achieving a large effective lift ratio of 2.9. This is particularly suitable for vehicle-mounted applications that require both minimal vertical space during retraction and a large effective lifting height. Furthermore, by incorporating a guide component 4, synchronous lifting and pitch adjustments are achieved, enabling precise adjustment of the equipment load's pitch attitude. This integrated and compact design of multi-degree-of-freedom motion control is particularly suitable for dynamic leveling of vehicle-mounted equipment in complex terrain. It meets the adaptive leveling requirements of the mounting component 5 when the vehicle is working on uneven ground, eliminating the need for an independent leveling system. The compact structure and rapid response make it suitable for complex operating conditions in vehicle environments. Additionally, by setting the distance between the two folding pivots 23 to be greater than the distance between the second ends of the two lower arms 21, interference between the two upper folding arms 2 during folding is avoided, thus achieving a large lift ratio within a limited space.

[0036] To prevent the folding arm 2 from swaying during lifting, the base 1 forms a triangular connection structure with the lower arm 21 and the drive component 3 at the hinge. That is, the drive component 3 and the lower arm 21 are arranged orthogonally opposite each other, forming a stable triangular mechanical system with theoretically zero degrees of freedom. This effectively enhances the anti-sway and anti-torsion capabilities of the folding arm 2, enabling the folding arm 2 to maintain good stability in the moving state.

[0037] In some embodiments, such as Figure 1 and Figure 2As shown, the lower arm 21 has a fork arm structure that is narrower at the top and wider at the bottom, which reduces the weight of the lower arm 21 while improving the rigidity and stability of the overall structure. The two arms of the lower arm 21 are hinged to the base 1 through two coaxially arranged hinges, so that the hinge points of the two hinges and the drive component 3 form a stable triangular structure. This hinge point layout further enhances the stability of the drive force transmission path, effectively suppresses the risk of swaying caused by lateral forces, and ensures a smooth and reliable lifting process.

[0038] For example, such as Figure 3 As shown, the base 1 is symmetrically provided with two sets of hinges, each set including three hinges. The drive component 3 is hinged to the base 1 through the first hinge 11. The bottom end of the lower arm 21 is hinged through the second hinge 12 and the third hinge 13. The second hinge 12 and the third hinge 13 are arranged coaxially and parallel to the axis of the first hinge 11. The first hinge 11 is located on the center line of the line connecting the second hinge 12 and the third hinge 13.

[0039] To reduce the stroke of drive component 3, such as Figure 1 and Figure 2 As shown, the two drive units 3 are located on the outer sides of the two lower arms 21 and are arranged symmetrically, thereby achieving a wide range of expansion and contraction of the folding arm with a small drive stroke, improving the effective lift ratio. Optionally, the drive unit 3 can be an electric lead screw, a hydraulic telescopic rod, or other driveable linear actuator.

[0040] In some embodiments, the guide assembly 4 and the two upper arms 22 constitute two synchronously sliding crank-slider mechanisms. The crank-slider mechanism ensures that the two upper arms 22 maintain synchronous movement during the extension and retraction process through the sliding engagement of the guide post 41 with the upper arms 22, avoiding structural jamming or load eccentricity caused by asynchronous movement.

[0041] Specifically, such as Figure 1 As shown, the guide assembly 4 includes a guide post 41, a connecting rod 42, and a slider 43. The guide post 41 is fixed to the bottom end of the mounting component 5 and is vertically arranged on the symmetrical plane of the two upper arms 22. The slider 43 is sleeved on the outer periphery of the guide post 41 and can slide along the axial direction of the guide post 41. Hinges are provided on both sides of the slider 43. The two ends of the two connecting rods 42 are respectively hinged to the two upper arms 22 and the slider 43, thereby realizing the connection between the connecting rods 42, the upper arms 22, and the slider 43 to form a double-crank linkage structure. When the two driving components 3 drive the two lower arms 21 to rotate, the two upper arms 22, under the constraint of the double-crank linkage structure, always maintain synchronous extension and retraction movements. This enables the mounting component 5 to rise and fall vertically when the two driving components 3 work synchronously, and to dynamically adjust the pitch angle of the mounting component 5 in one dimension when the two driving components 3 work asynchronously, thereby adapting to the operational needs under different terrain conditions.

[0042] To improve the stability of the mounting component 5, each upper arm 22 is hinged to the mounting component 5 via two hinge points. For example, as shown... Figure 1 and Figure 2 As shown, the upper arm 22 is trapezoidal, and the two arms are hinged to the mounting component 5 to form a double-point constraint, which effectively suppresses the torsion and lateral displacement of the mounting component 5 during the movement.

[0043] Considering the potential for bumps during vehicle movement, the slider 43 features a shaft-locking structure, allowing the lifting height of the mounting component 5 to be locked. This prevents the slider 43 from sliding on the guide post 41 due to vibration or external forces, ensuring that the equipment load maintains a stable height during transportation or operation, effectively improving operational safety. For example, the slider 43 can be a linear locking slider with an optical axis.

[0044] In some embodiments, the vehicle-mounted dual-drive automatic lifting mechanism further includes a drive controller, a stroke sensor, and a tilt sensor. The drive controller controls the stroke of the two drive components 3, the stroke sensor provides feedback on the stroke position of the two drive components 3 to the drive controller, and the tilt sensor, mounted on the mounting component 5, provides feedback on the tilt angle of the mounting component 5 to the drive controller. The mounting component 5 transmits the tilt angle information to the drive controller in real time, and the controller dynamically adjusts the stroke of the two drive components 3 according to a preset algorithm to achieve adaptive leveling during the lifting process.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle-mounted double drive lifting mechanism, characterized in that, It includes a base (1), a folding arm (2), a drive unit (3), a guide assembly (4), and a mounting unit (5); The folding arm (2) includes a lower arm (21), an upper arm (22), and a folding pivot (23); the first end of the lower arm (21) and the first end of the upper arm (22) can be folded rotatably through the folding pivot (23); The second end of the lower arm (21) and the second end of the upper arm (22) are respectively hinged to the base (1) and the mounting component (5), and the hinge axis is parallel to the folding pivot (23); The driving element (3) is a linear actuator. One end of the driving element (3) is hinged to the base (1) and the other end acts on the lower arm (21) so that the lower arm (21) can rotate about its hinge axis with the base (1). The two sets of folding arms (2) and the drive unit (3) are arranged opposite to each other; the distance between the two folding pivots (23) is greater than the distance between the second ends of the two lower arms (21); The guide component (4) can limit the two upper arms (22) to expand or retract synchronously relative to the mounting member (5), so that the two drive members (3) can control the lifting and pitch angles of the mounting member (5).

2. The dual drive lift mechanism of claim 1, wherein, The base (1) forms a triangular connection structure at the hinge point with the lower arm (21) and the drive member (3).

3. The dual drive lift mechanism of claim 1, wherein, The guide assembly (4) and the two upper arms (22) constitute two synchronously sliding crank-slider mechanisms.

4. The dual drive lift mechanism of claim 2, wherein, The guide assembly (4) includes a guide post (41) which is fixed to the bottom end of the mounting (5) and is vertically arranged on the symmetrical plane of the two upper arms (22).

5. The dual drive lift mechanism of claim 4, wherein, The guide assembly (4) further includes connecting rods (42) and sliders (43); the sliders (43) are slidably connected to the guide post (41), and the two ends of the two connecting rods (42) are respectively hinged to the two upper arms (22) and the sliders (43).

6. The dual drive lift mechanism of claim 5, wherein, The slider (43) has a shaft locking structure, which allows the lifting height of the mounting component (5) to be locked.

7. The dual drive lift mechanism of claim 6, wherein, The two drive members (3) are located on the outside of the two lower arms (21).

8. The dual drive lift mechanism of claim 7, wherein, The lower arm (21) is a fork arm structure that is narrow at the top and wide at the bottom.

9. The dual drive lift mechanism of claim 8, wherein, The two arms of the lower arm (21) are respectively hinged to the base (1) through two coaxially arranged hinges.

10. The dual drive lift mechanism of any one of claims 1 to 9, wherein, It also includes a drive controller, a stroke sensor, and a tilt sensor.

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