Lifting mechanism and automobile tailgate

Abstract

The invention relates to the field of automobile tailgates, and specifically discloses a lifting mechanism and an automobile tailgate, comprising: an automobile body, wherein a movable tailgate is rotatably installed at the lower end of the rear of the automobile body; a slider is movably installed at the upper end of a passive telescopic rod, and the slider is slidably installed in the inner cavity of a guide rail; a connecting sleeve is threadedly sleeved on the outer side of a threaded driving rod, and the connecting sleeve is fixedly connected to the slider; a limiting member is arranged at the upper end of the guide rail and presses the end of the movable tailgate on the surface of the automobile body; the beneficial effect is that by arranging a passive telescopic rod on the outer side of the guide rail, the connection position of the lower end of the passive telescopic rod and the movable tailgate can be arranged at a distance farther from the rotating axis of the movable tailgate, so as to reduce the reaction force borne by the passive telescopic rod, and the slider at the upper end of the passive telescopic rod is driven by the threaded driving rod to move up and down, and when the slider slides to the lower end of the guide rail, it can be folded on the side of the movable tailgate, so as to prevent the material feeding route from being blocked.

Description

Technical Field

[0001] The invention relates to the field of automobile tailboards, in particular to a lifting mechanism and an automobile tailboard. Background Art

[0002] A car tail lift, also known as a car lifting tail lift, a car loading and unloading tail lift, a lifting tail lift, a hydraulic car tail lift, and a truck tail lift, is a hydraulic lifting and loading equipment installed at the rear of trucks and various vehicles, powered by an on-board battery.

[0003] In the prior art, the tailgate of an automobile is usually driven by a hydraulic cylinder to rotate, unfold and overlap the ground, or fold on the side of the vehicle. The common installation position of the hydraulic cylinder is the bottom or side of the rear end of the automobile.

[0004] However, at present, when the hydraulic cylinder at the bottom of the rear end of the car pushes the tailgate to rotate, the hydraulic cylinder needs to withstand a large reaction force to drive the tailgate to rotate because the connection position between the end of the hydraulic cylinder and the tailgate is very close to the rotation axis of the tailgate. Although the hydraulic cylinder located on the side of the rear end of the car can set the connection position farther away from the rotation axis of the tailgate, after the tailgate is unfolded, the hydraulic cylinder is tilted on the side of the tailgate, which will block the material loading route and thus affect the loading efficiency. Summary of the invention

[0005] The object of the present invention is to provide a lifting mechanism and a car tailgate to solve the problem that the structure for driving the tailgate to rotate and lift in the above background technology needs to withstand a large reaction force and will block the material loading route when unfolded.

[0006] To achieve the above object, the present invention provides the following technical solution: a lifting mechanism, the lifting mechanism comprising:

[0007] A car body, wherein a movable tail plate is rotatably mounted at the lower end of the rear portion of the car body, a passive telescopic rod is disposed on the side of the movable tail plate, and the lower end of the passive telescopic rod is rotatably connected to the middle portion of the side of the movable tail plate;

[0008] A guide rail, wherein the guide rail is fixed to the rear surface of the automobile body and is vertically arranged with a gap between the guide rail and the automobile body; a slider is movably arranged at the upper end of the passive telescopic rod, and the slider is slidably installed in the inner cavity of the guide rail;

[0009] A threaded drive rod, the threaded drive rod is rotatably installed in the gap between the guide rail and the car body, the outer thread sleeve of the threaded drive rod is connected with a connecting sleeve, and the connecting sleeve is fixedly connected to the slider; and

[0010] A limiting member is arranged at the upper end of the guide rail and presses the end of the movable tail plate onto the surface of the automobile body.

[0011] Preferably, a guide groove is provided on the front side of the guide rail, and a connecting platform is fixedly connected to the surface of the sliding block. The connecting platform passes through the guide groove and extends to the outside of the guide rail, ensuring that the connecting platform can slide up and down along the guide groove.

[0012] Preferably, both ends of the passive telescopic rod are fixedly connected with connecting frames, the side of the movable tail plate is fixedly connected with a connecting pin, and the two connecting frames are rotatably connected to the connecting platform and the connecting pin respectively, so that the upper and lower ends of the passive telescopic rod can rotate.

[0013] Preferably, the upper and lower ends of the threaded drive rod are rotatably connected to the upper and lower ends of the guide rail through bearings respectively, the lower end of the guide rail is fixedly connected to a drive motor, and the output end of the drive motor is fixedly connected to the lower end of the threaded drive rod, thereby realizing the rotation of the threaded drive rod.

[0014] Preferably, an anti-collision plate located below the passive telescopic rod is fixedly provided on the side of the movable tail plate, the width of the anti-collision plate is greater than the diameter of the passive telescopic rod, and friction grooves are provided on the surface of the movable tail plate to protect the passive telescopic rod.

[0015] Preferably, a receiving groove is provided in the middle of one end of the movable tailgate close to the automobile body, and a rotating shaft body fixedly connected to the automobile body is provided in the inner cavity of the receiving groove, thereby realizing the rotational connection between the movable tailgate and the automobile body.

[0016] Preferably, the limiting member includes a fixed support fixedly connected to the guide rail, a rotating cavity is opened in the middle of the fixed support, and the inner cavity of the rotating cavity is provided with a fixed shaft fixedly connected to the fixed support. The setting of the rotating cavity is used to prevent the fixed support from hindering the upward sliding of the connecting platform.

[0017] Preferably, the inner cavity of the fixed support is provided with a clamping limit plate, the upper half of the clamping limit plate is provided with a rotating groove, the rotating groove is rotatably sleeved on the outer side of the fixed shaft, the open end of the rotating groove is provided with a torsion spring, the two ends of the torsion spring respectively fix the fixed support and the clamping limit plate, and the upper and lower ends of the clamping limit plate are provided with rollers, thereby realizing the clamping and limiting of the movable tail plate.

[0018] Preferably, a plurality of stiffening plates which are vertically distributed at equal intervals are fixedly connected to a side of the guide rail close to the automobile body, and the stiffening plates are fixedly connected to the automobile body to enhance the strength of the guide rail.

[0019] A car tailgate comprises the above-mentioned lifting mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The lifting mechanism and automobile tail board proposed by the present invention are provided with a passive telescopic rod on the outer side of the guide rail, the upper end of the passive telescopic rod is slidably connected to the guide rail through a slider, the connection position of the lower end of the passive telescopic rod and the movable tail board can be set farther away from the rotating axis of the movable tail board to reduce the reaction force borne by the passive telescopic rod, the slider at the upper end of the passive telescopic rod is driven up and down by a threaded driving rod, and when the slider slides to the lower end of the guide rail, it can be folded on the side of the movable tail board to prevent the material loading route from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the movable tailgate structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the separation of the passive telescopic rod and the guide rail structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the separation of the clamping limit plate and the fixed support structure of the present invention;

[0026] Figure 5 It is a cross-sectional schematic diagram of the guide rail structure of the present invention;

[0027] Figure 6 It is a schematic diagram of folding the movable tail plate structure of the present invention.

[0028] In the figure: 1. car body; 2. movable tail plate; 21. friction pattern; 22. storage slot; 3. passive telescopic rod; 31. connecting frame; 4. guide rail; 41. stiffening plate; 5. fixed support; 51. rotating cavity; 52. fixed shaft; 6. clamping limit plate; 61. rotating slot; 7. torsion spring; 8. roller; 9. guide slot; 10. slider; 11. connecting platform; 12. connecting sleeve; 13. threaded drive rod; 14. drive motor; 15. connecting pin; 16. anti-collision plate. DETAILED DESCRIPTION

[0029] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] See also Figure 1-Figure 6The present invention provides a technical solution: a lifting mechanism, including: a car body 1, a guide rail 4, a threaded driving rod 13 and a limiter.

[0032] Specifically, a movable tail plate 2 is rotatably mounted at the lower end of the rear part of the automobile body 1, and a passive telescopic rod 3 is arranged on the side of the movable tail plate 2. The lower end of the passive telescopic rod 3 is rotatably connected to the middle part of the side of the movable tail plate 2. The passive telescopic rod 3 is an existing well-known technology, which does not actively extend and retract by itself, but passively extends and retracts after being acted upon by external thrust or tension. When the movable tail plate 2 rotates and unfolds, the passive telescopic rod 3 is driven to extend and retract, until the passive telescopic rod 3 is extended to the maximum stroke so that the movable tail plate 2 can be suspended.

[0033] Secondly, the guide rail 4 is fixed to the rear surface of the automobile body 1 and is vertically arranged with a gap between the automobile body 1. The upper end of the passive telescopic rod 3 is movably provided with a slider 10, and the slider 10 is slidably installed in the inner cavity of the guide rail 4. When the slider 10 slides up and down, it can drive the passive telescopic rod 3 to move up and down as a whole, so as to adjust the deployment angle of the movable tail plate 2, and ensure that the movable tail plate 2 can overlap on the ground;

[0034] In addition, the threaded drive rod 13 is rotatably installed in the gap between the guide rail 4 and the automobile body 1. The outer threaded sleeve of the threaded drive rod 13 is connected with a connecting sleeve 12, and the connecting sleeve 12 is fixedly connected to the slider 10. When the threaded drive rod 13 rotates, it can drive the connecting sleeve 12 and the slider 10 to move up and down to adjust the height position of the passive telescopic rod 3. When the slider 10 slides down to the lower end of the guide rail 4, the passive telescopic rod 3 is squeezed and contracted and rotates around its lower end and folded to the side of the movable tail plate 2, thereby avoiding obstruction to the material feeding route;

[0035] Furthermore, a stopper is disposed at the upper end of the guide rail 4 and presses the end of the movable tailgate 2 against the surface of the automobile body 1 to prevent the movable tailgate 2 from automatically unfolding.

[0036] Embodiment 2

[0037] On the basis of embodiment one, in order to drive the upper end of the passive telescopic rod 3 to slide up and down, the present application also has a guide groove 9 on the front side of the guide rail 4, and a connecting platform 11 is fixedly connected to the surface of the slider 10, and the connecting platform 11 passes through the guide groove 9 and extends to the outside of the guide rail 4.

[0038] Both ends of the passive telescopic rod 3 are fixedly connected to a connecting frame 31, and the side of the movable tail plate 2 is fixedly connected to a connecting pin 15. The two connecting frames 31 are rotatably connected to the connecting platform 11 and the connecting pin 15 respectively. Figure 5 As shown, when the slider 10 slides up and down, the upper end of the passive telescopic rod 3 can be driven to slide up and down through the connection between the connecting platform 11 and the connecting frame 31, as shown in FIG. Figure 2 and Figure 3As shown, the passive telescopic rod 3 can rotate around the connecting pin 15 at its lower end.

[0039] Embodiment 3

[0040] On the basis of Example 2, in order to drive the threaded drive rod 13 to rotate, the upper and lower ends of the threaded drive rod 13 of the present application are rotatably connected to the upper and lower ends of the guide rail 4 through bearings respectively, and the lower end of the guide rail 4 is fixedly connected to a drive motor 14, and the output end of the drive motor 14 is fixedly connected to the lower end of the threaded drive rod 13, and the drive motor 14 is used to drive the threaded drive rod 13 to rotate.

[0041] Embodiment 4

[0042] On the basis of the third embodiment, in order to prevent the passive telescopic rod 3 from being hit, the present application also has an anti-collision plate 16 fixedly provided on the side of the movable tail plate 2 and located below the passive telescopic rod 3. The width of the anti-collision plate 16 is greater than the diameter of the passive telescopic rod 3 to prevent the material from hitting the surface of the passive telescopic rod 3 when moving horizontally. The surface of the movable tail plate 2 is provided with friction grooves 21 to increase the friction between the material and the movable tail plate 2 to prevent the material from sliding down.

[0043] In addition, a storage groove 22 is provided in the middle of one end of the movable tailgate 2 close to the automobile body 1, and the inner cavity of the storage groove 22 is provided with a rotating shaft body fixedly connected to the automobile body 1 to ensure the rotational connection between the movable tailgate 2 and the automobile body 1. In addition, the movable tailgate 2 and the automobile body 1 can also be connected by a high-strength hinge, and it is only necessary to ensure that the movable tailgate 2 can be rotated and raised.

[0044] Embodiment 5

[0045] On the basis of the fourth embodiment, in order to fold the movable tailgate 2 on the surface of the rear end of the automobile body 1 to reduce the space occupied and prevent the movable tailgate 2 from automatically unfolding, the limiting member of the present application includes a fixed support 5 fixedly connected to the guide rail 4, and a rotating cavity 51 is opened in the middle of the fixed support 5. The inner cavity of the rotating cavity 51 is provided with a fixed shaft 52 fixedly connected to the fixed support 5. The opening of the rotating cavity 51 prevents the upward sliding of the connecting platform 11 from being blocked.

[0046] Secondly, a clamping limit plate 6 is provided in the inner cavity of the fixed support 5, and a rotation groove 61 is provided in the upper half of the clamping limit plate 6, and the rotation groove 61 is rotatably sleeved on the outer side of the fixed shaft 52, that is to say, the clamping limit plate 6 can rotate around the fixed shaft 52, and the lower half length of the clamping limit plate 6 is greater than the upper half length. When the connecting platform 11 slides up to the top of the fixed support 5, the connecting platform 11 squeezes the upper half of the clamping limit plate 6 to make the clamping limit plate 6 rotate. At this time, the lower end of the clamping limit plate 6 is pressed on the surface of the passive telescopic rod 3, so that the passive telescopic rod 3 rotates around its upper end and approaches the automobile body 1, thereby driving the movable tail plate 2 to fold. It is stacked on the rear end surface of the automobile body 1 to reduce the space occupied. A torsion spring 7 is provided at the open end of the rotating groove 61. The two ends of the torsion spring 7 respectively fix the fixed support 5 and the clamping limit plate 6. The torsion spring 7 provides torque so that the clamping limit plate 6 can be automatically reset. That is to say, when the connecting platform 11 slides down and separates from the clamping limit plate 6, the clamping limit plate 6 can automatically rotate so that its lower end is separated from the surface of the guide rail 4 to ensure that the guide rail 4 will not be blocked by the lower end of the clamping limit plate 6 when sliding up. Rollers 8 are provided at the upper and lower ends of the clamping limit plate 6 to reduce the friction generated between the end of the clamping limit plate 6 and the connecting platform 11 and the passive telescopic rod 3.

[0047] Embodiment 6

[0048] On the basis of Example 5, in order to strengthen the strength of the guide rail 4, the present application also has a plurality of equally spaced and vertically distributed stiffening plates 41 fixedly connected to a side of the guide rail 4 close to the automobile body 1, and the stiffening plates 41 are fixedly connected to the automobile body 1 to strengthen the strength of the guide rail 4 and prevent the guide rail 4 from being deformed due to the horizontal pressure of the slider 10.

[0049] The invention also discloses a car tail plate, comprising the above-mentioned lifting mechanism.

[0050] In actual use, the drive motor 14 is started to drive the threaded drive rod 13 to rotate, and the threaded drive rod 13 drives the connecting sleeve 12, the slider 10 and the connecting platform 11 to slide upward, thereby driving the upper end of the passive telescopic rod 3 to slide upward, and the passive telescopic rod 3 is extended to the maximum stroke by the gravity of the movable tail plate 2, and then the passive telescopic rod 3 drives the movable tail plate 2 to rotate upward;

[0051] When the connecting platform 11 slides up and passes over the fixed support 5, the connecting platform 11 squeezes the upper half of the clamping limit plate 6 to make the clamping limit plate 6 rotate. At this time, the lower end of the clamping limit plate 6 squeezes the upper part of the passive telescopic rod 3 to make the passive telescopic rod 3 rotate around its own upper end and approach the guide rail 4 (such as Figure 6As shown in the figure, since the passive telescopic rod 3 and the movable tail plate 2 have formed an obtuse triangle structure at this time, when the lower end of the passive telescopic rod 3 approaches the guide rail 4, the passive telescopic rod 3 will be squeezed by the movable tail plate 2 and contracted, and drive the movable tail plate 2 to continue to rotate upward until the passive telescopic rod 3 and the movable tail plate 2 are folded and attached to the surface of the rear end of the automobile body 1;

[0052] When the movable tail board 2 needs to be unfolded, the threaded driving rod 13 is reversed to make the slider 10 and the connecting platform 11 slide down, and the passive telescopic rod 3 can push the movable tail board 2 and separate the movable tail board 2 from the rear end surface of the automobile body 1, so that the movable tail board 2 is unfolded.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism, characterized in that: The lifting mechanism comprises: A car body (1), wherein a movable tailgate (2) is rotatably mounted at the lower end of the rear portion of the car body (1), a passive telescopic rod (3) is arranged on the side of the movable tailgate (2), and the lower end of the passive telescopic rod (3) is rotatably connected to the middle portion of the side of the movable tailgate (2); A guide rail (4), the guide rail (4) being fixed to the rear surface of the automobile body (1) and arranged vertically with a gap between the guide rail (4) and the automobile body (1), a slider (10) being movably arranged at the upper end of the passive telescopic rod (3), and the slider (10) being slidably mounted in the inner cavity of the guide rail (4); A threaded drive rod (13), the threaded drive rod (13) being rotatably mounted in a gap between the guide rail (4) and the vehicle body (1), the outer thread sleeve of the threaded drive rod (13) being connected to a connecting sleeve (12), the connecting sleeve (12) being fixedly connected to the slider (10); and A limiting member, the limiting member being arranged at the upper end of the guide rail (4) and pressing the end of the movable tail plate (2) against the surface of the automobile body (1); The position-limiting member comprises a fixed support (5) fixedly connected to the guide rail (4); a rotating cavity (51) is provided in the middle of the fixed support (5); and a fixed shaft (52) fixedly connected to the fixed support (5) is provided in the inner cavity of the rotating cavity (51); The front side of the guide rail (4) is provided with a guide groove (9), the surface of the slider (10) is fixedly connected with a connecting platform (11), and the connecting platform (11) penetrates the guide groove (9) and extends to the outside of the guide rail (4); The inner cavity of the fixed support (5) is provided with a clamping limit plate (6), the upper half of which is provided with a rotation groove (61), the rotation groove (61) is rotatably sleeved on the outer side of the fixed shaft (52), the open end of the rotation groove (61) is provided with a torsion spring (7), the two ends of the torsion spring (7) respectively fix the fixed support (5) and the clamping limit plate (6), the upper and lower ends of the clamping limit plate (6) are provided with rollers (8), when the connecting platform (11) slides up to the top of the fixed support (5), the connecting platform (11) presses the upper half of the clamping limit plate (6) so that the clamping limit plate (6) rotates, at which time the lower end of the clamping limit plate (6) presses on the surface of the passive telescopic rod (3) so that the passive telescopic rod (3) rotates around its upper end and approaches the automobile body (1), thereby driving the movable tail plate (2) to fold on the tail end surface of the automobile body (1).

2. A lifting mechanism according to claim 1, characterized in that: Both ends of the passive telescopic rod (3) are fixedly connected to a connecting frame (31), the side of the movable tail plate (2) is fixedly connected to a connecting pin (15), and the two connecting frames (31) are rotatably connected to the connecting platform (11) and the connecting pin (15) respectively.

3. A lifting mechanism according to claim 2, characterized in that: The upper and lower ends of the threaded drive rod (13) are rotatably connected to the upper and lower ends of the guide rail (4) through bearings respectively; the lower end of the guide rail (4) is fixedly connected to a drive motor (14); and the output end of the drive motor (14) is fixedly connected to the lower end of the threaded drive rod (13).

4. A lifting mechanism according to claim 3, characterized in that: An anti-collision plate (16) located below the passive telescopic rod (3) is fixedly arranged on the side of the movable tail plate (2); the width of the anti-collision plate (16) is greater than the diameter of the passive telescopic rod (3); and friction lines (21) are provided on the surface of the movable tail plate (2).

5. A lifting mechanism according to claim 4, characterized in that: A receiving groove (22) is provided in the middle of one end of the movable tailgate (2) close to the automobile body (1), and a rotating shaft body fixedly connected to the automobile body (1) is provided in the inner cavity of the receiving groove (22).

6. A lifting mechanism according to claim 5, characterized in that: A plurality of equidistantly vertically distributed reinforcing plates (41) are fixedly connected to a side of the guide rail (4) close to the automobile body (1); the reinforcing plates (41) are fixedly connected to the automobile body (1).

7. A car tailgate, characterized in that: The invention comprises the lifting mechanism described in any one of claims 1 to 6.

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