Self-locking mechanism for folding plate of lifting tail plate for vehicle

Abstract

The invention relates to the technical field of vehicle lifting tail plates, and discloses a vehicle lifting tail plate folding plate self-locking mechanism which comprises a mounting main plate, a bearing platform arranged on one side of the mounting main plate, a folding plate arranged on the top of the bearing platform and a locking mechanism arranged on one side of one end of the bearing platform and one side of one end of the folding plate. The first hinge mechanism is arranged between the bearing platform and the folding plate, the second hinge mechanism is arranged between the mounting main plate and the bearing platform, and the driving mechanism is arranged on the second hinge mechanism. According to the self-locking mechanism for the folding plate of the lifting tail plate for the vehicle, a pure mechanical'lock tongue + lock hook 'structure is adopted, and the tail part of the lock hook is provided with a step for limiting and an inclined plane for guiding, so that when the folding plate is closed, even if a driver forgets to manually unlock, the lock tongue can also automatically eject the lock hook by virtue of inertia force and fall in place again, and'forced self-locking' is realized; and the lock hook cannot be automatically opened under the action of gravity, so that the unlocking failure caused by forgetting to operate is completely eradicated.

Description

Technical Field

[0001] This invention relates to the field of vehicle crane tailgate technology, and more particularly to a self-locking mechanism for a vehicle crane tailgate folding plate. Background Technology

[0002] Currently, the load-bearing platform of vehicle crane tailgates, also known as the "main platform," mostly adopts a split structure of "main platform + folding plate." The folding plate is connected to the main platform through a hinge and can be folded upward when not in use to reduce the rear overhang of the vehicle, reduce wind resistance, and improve aesthetics. When loading and unloading operations, the folding plate can be unfolded to expand the effective load-bearing area.

[0003] However, current vehicle-mounted crane tailgates, when folded and closed, can cause the folding plate to rotate forward due to inertia during rapid deceleration, making it prone to colliding with items or people inside the vehicle. During rapid acceleration, it can also turn towards the load-bearing platform, causing collisions and abnormal noises. Furthermore, the manual operation involves many steps, which are easy to forget and require a lot of force. The mechanical lock is also prone to disengagement under severe working conditions. Summary of the Invention

[0004] In view of the problems of existing vehicle-mounted crane tailgates, when the tailgate is closed in the folded state, the folded tailgate will rotate forward due to inertia during rapid deceleration, which may cause it to collide with items or people inside the vehicle. During rapid acceleration, it will turn towards the load-bearing platform, causing collisions and abnormal noises. In addition, there are many manual operation steps, which are easy to forget and require a lot of operating force. Furthermore, the mechanical locking is prone to disengagement under severe working conditions. Therefore, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a self-locking mechanism for a vehicle crane tailgate folding plate. The mechanism employs a purely mechanical "locking tongue + locking hook" structure, with a stepped limit and inclined guide at the tail of the locking hook. When the folding plate is closed, even if the driver forgets to manually unlock it, the locking tongue can automatically push open the locking hook and return to its original position using inertia, achieving "forced self-locking." When the tailgate is fully closed, the locking hook cannot open automatically under gravity, completely eliminating unlocking failure due to forgotten operation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a self-locking mechanism for a folding plate of a vehicle crane tailgate, including a mounting main board, a carrying platform disposed on one side of the mounting main board, a folding plate disposed on the top of the carrying platform, a locking mechanism disposed on one side of the carrying platform and the folding plate, a first hinge mechanism disposed between the carrying platform and the folding plate, a second hinge mechanism disposed between the mounting main board and the carrying platform, and a driving mechanism disposed on the second hinge mechanism; The locking mechanism includes a latch seat disposed on one side of one end of the folding plate, a lock seat disposed on one side of the bearing platform near the latch seat, two sets of fixing plates disposed on one end of the lock seat, an arc-shaped groove disposed on the top of the fixing plate, and a latch disposed on one side of the latch seat, wherein one end of the latch passes through the two sets of fixing plates through the two sets of arc-shaped grooves.

[0007] As a preferred embodiment of the self-locking mechanism of the folding plate of the vehicle crane tailgate of the present invention, the locking mechanism further includes a first connecting hole opened on one side of the fixed plate, the first connecting hole penetrating the fixed plate, a pin disposed inside the first connecting hole, both ends of the pin penetrating the fixed plate, a positioning seat disposed at one end of the pin, an annular groove disposed on the surface of the pin away from the positioning seat, and a retaining spring disposed on the surface of the annular groove.

[0008] As a preferred embodiment of the self-locking mechanism of the folding plate of the vehicle crane tailgate described in this invention, a locking hook is provided between the two sets of fixed plates, a second connecting hole is provided on one side of the locking hook, and the second connecting hole passes through the locking hook, and the pin passes through the locking hook through the second connecting hole.

[0009] As a preferred embodiment of the self-locking mechanism of the folding plate of the vehicle crane tailgate described in this invention, wherein: one end of the locking hook is provided with an arc-shaped groove, and the surface of the arc-shaped groove and the locking tongue are in contact with each other, and the end of the locking hook away from the arc-shaped groove is provided with a protrusion.

[0010] As a preferred embodiment of the self-locking mechanism of the folding plate of the vehicle crane tailgate described in this invention, the first hinge mechanism includes three sets of first mounting slots disposed at one end of the top of the bearing platform, hinge sleeves disposed on both sides of the inner cavity of the first mounting slots, three sets of second mounting slots disposed at one end of the top of the folding plate, and connecting rods disposed on both sides of the inner cavity of the second mounting slots, wherein the three sets of connecting rods slide through the three sets of hinge sleeves respectively.

[0011] As a preferred embodiment of the self-locking mechanism of the folding plate of the vehicle crane tailgate described in this invention, the bearing platform is provided with support blocks on both sides away from the end of the folding plate, and the support blocks are L-shaped.

[0012] As a preferred embodiment of the self-locking mechanism of the folding plate of the vehicle crane tailgate described in this invention, the second hinge mechanism includes fixed hinge seats disposed on both sides of one end of the mounting main plate, a connecting plate disposed at one end of the fixed hinge seats, a mounting rod rotatably connected to the end of the connecting plate away from the fixed hinge seats, and the mounting rod rotatably connected to the bottom of one end of the bearing platform, and a connecting crossbar disposed on one side of the two sets of connecting plates that are close to each other.

[0013] As a preferred embodiment of the self-locking mechanism for the folding plate of the vehicle crane tailgate described in this invention, the driving mechanism includes a first hydraulic push rod disposed on one side of the bottom of one end of the fixed hinge seat, a first hinge seat disposed on the output end of the first hydraulic push rod, and the first hinge seat is rotatably connected to the bottom of one end of the bearing platform, a second hydraulic push rod disposed on the bottom of one end of the fixed hinge seat away from the first hydraulic push rod, and a second hinge seat disposed on the bottom of the connecting plate away from the fixed hinge seat, and the output end of the second hydraulic push rod is fixedly connected to the second hinge seat.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: This invention employs a purely mechanical "locking tongue + locking hook" structure. The locking hook is equipped with a stepped limit and a sloped guide at its tail. When the folding plate is closed, even if the driver forgets to manually unlock it, the locking tongue can automatically push open the locking hook and return to its original position due to inertia, achieving "forced self-locking." When the tailgate is completely closed, the locking hook cannot open on its own under the action of gravity, completely eliminating unlocking failures caused by forgotten operation. At the same time, the ingenious mechanical design achieves self-locking without the need for additional energy or complex control systems, improving the safety and convenience of use. Moreover, the simple structure and few parts reduce raw material and processing costs, thereby achieving low-cost manufacturing. The simple mechanical structure also reduces failure points, improves the stability and reliability of the system, and ensures normal operation under various working conditions. Finally, it also has good compatibility and scalability, making it easy to adjust and upgrade according to different vehicle models and usage needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the self-locking mechanism of the folding plate of the vehicle crane tailgate of the present invention; Figure 2 This is a schematic diagram of the overall structure of the self-locking mechanism of the folding plate of the vehicle crane tailgate of the present invention from another perspective. Figure 3 This is an exploded three-dimensional structural diagram of the self-locking mechanism of the folding plate of the vehicle crane tailgate of the present invention. Figure 4 This is a three-dimensional structural diagram of the bearing platform and folding plate of the self-locking mechanism for the folding plate of the vehicle crane tailgate of the present invention. Figure 5 The present invention relates to a self-locking mechanism for a folding plate of a vehicle crane tailgate. Figure 1 A magnified structural diagram at point A; Figure 6 This is a three-dimensional structural diagram of the locking mechanism of the self-locking mechanism of the folding plate of the vehicle crane tailgate of the present invention. Figure 7 This is an exploded three-dimensional structural diagram of the locking mechanism of the self-locking mechanism of the folding plate of the vehicle crane tailgate of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Mainboard mounting; 2. Support platform; 3. Folding plate; 4. Locking mechanism; 41. Lock seat; 42. Fixing plate; 43. First connecting hole; 44. Arc groove; 45. Lock tongue seat; 46. Lock tongue; 47. Pin; 48. Positioning seat; 49. Annular groove; 40. Snap ring; 401. Lock hook; 402. Second connecting hole; 403. Arc groove; 404. Protrusion; 5. First hinge mechanism; 51. First mounting groove; 52. Hinge sleeve; 53. Second mounting groove; 54. Connecting rod; 55. Support block; 6. Second hinge mechanism; 61. Fixed hinge seat; 62. Connecting plate; 63. Connecting crossbar; 64. Mounting link; 7. Drive mechanism; 71. First hydraulic push rod; 72. First hinge seat; 73. Second hydraulic push rod; 74. Second hinge seat. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Reference Figures 1-7 As an embodiment of the present invention, a self-locking mechanism for a folding plate of a vehicle crane tailgate is provided. This self-locking mechanism for a folding plate of a vehicle crane tailgate includes a mounting main board 1, a bearing platform 2 disposed on one side of the mounting main board 1, a folding plate 3 disposed on the top of the bearing platform 2, a locking mechanism 4 disposed on one side of the bearing platform 2 and the folding plate 3, a first hinge mechanism 5 disposed between the bearing platform 2 and the folding plate 3, a second hinge mechanism 6 disposed between the mounting main board 1 and the bearing platform 2, and a driving mechanism 7 disposed on the second hinge mechanism 6. The locking mechanism 4 includes a latch seat 45 fixedly installed on one side of one end of the folding plate 3, a lock seat 41 fixedly installed on one side of the carrying platform 2 near the latch seat 45, two sets of fixing plates 42 fixedly installed on one end of the lock seat 41, an arc-shaped groove 44 opened on the top of the fixing plate 42, and a latch 46 fixedly installed on one side of the latch seat 45, with one end of the latch 46 passing through the two sets of fixing plates 42 through the two sets of arc-shaped grooves 44.

[0019] The locking mechanism 4 also includes a first connecting hole 43 opened on one side of the fixed plate 42, and the first connecting hole 43 penetrates the fixed plate 42. A pin 47 is slidably connected inside the first connecting hole 43, and both ends of the pin 47 penetrate the fixed plate 42. A positioning seat 48 is fixedly installed at one end of the pin 47. An annular groove 49 is opened on the surface of the pin 47 at the end away from the positioning seat 48. A retaining ring 40 is sleeved on the surface of the annular groove 49.

[0020] A locking hook 401 is provided between the two sets of fixing plates 42. A second connecting hole 402 is opened on one side of the locking hook 401 and the second connecting hole 402 passes through the locking hook 401. The pin 47 passes through the locking hook 401 through the second connecting hole 402.

[0021] One end of the locking hook 401 is provided with an arc-shaped groove 403, and the surface of the arc-shaped groove 403 and the locking tongue 46 are in contact with each other. The end of the locking hook 401 away from the arc-shaped groove 403 is provided with a protrusion 404.

[0022] The first hinge mechanism 5 includes three sets of first mounting slots 51 opened at one end of the top of the bearing platform 2, hinge sleeves 52 rotatably connected to both sides of the inner cavity of the first mounting slots 51, three sets of second mounting slots 53 opened at one end of the top of the folding plate 3, connecting rods 54 fixedly installed on both sides of the inner cavity of the second mounting slots 53, and the three sets of connecting rods 54 respectively slide through the three sets of hinge sleeves 52. Support blocks 55 are fixedly installed on both sides of the bearing platform 2 away from the folding plate 3, and the support blocks 55 are L-shaped to facilitate auxiliary bearing operation of the folding plate 3.

[0023] The second hinge mechanism 6 includes a fixed hinge seat 61 fixedly installed on both sides of one end of the mounting main board 1, a connecting plate 62 hinged to one end of the fixed hinge seat 61, a mounting rod 64 rotatably connected to the end of the connecting plate 62 away from the fixed hinge seat 61, and the mounting rod 64 rotatably connected to the bottom of one end of the bearing platform 2, and a connecting crossbar 63 fixedly connected to the side of the two sets of connecting plates 62 that are close to each other, thereby improving the stability between the two sets of connecting plates 62.

[0024] The drive mechanism 7 includes a first hydraulic push rod 71 hinged to one side of the bottom of a fixed hinge seat 61, a first hinge seat 72 fixedly installed at the output end of the first hydraulic push rod 71, and the first hinge seat 72 is rotatably connected to the bottom of one end of the bearing platform 2, a second hydraulic push rod 73 hinged to the bottom of one side of the fixed hinge seat 61 away from the first hydraulic push rod 71, and a second hinge seat 74 hinged to the bottom of the connecting plate 62 away from the fixed hinge seat 61, and the output end of the second hydraulic push rod 73 is fixedly connected to the second hinge seat 74.

[0025] During use, the support platform 2 is connected to the mounting motherboard 1 through the second hinge mechanism 6. When the first hydraulic push rod 71 and the second hydraulic push rod 73 are activated, the support platform 2 can gradually change from a vertical state to a horizontal state. At this time, the locking mechanism 4 is in a locked state. When the support platform 2 is horizontal, the locking hook 401 is in a relaxed state. The operator can manually push the protrusion 404 to open the locking hook 401. At this time, the locking tongue 46 is disengaged from the locking hook 401, and the folding plate 3 can be opened. When the first hydraulic push rod 71 and the second hydraulic push rod 73 are activated again to close the support platform 2, the locking hook 401 needs to be opened, the folding plate 3 closes, and the locking tongue 46 enters the designed position to close the locking hook 401. The folding plate 3 is locked. If the locking hook 401 is forgotten to be opened, the locking hook 401 can also be automatically opened by the force exerted by the locking tongue 46 on the inclined surface of the locking hook 401 when the folding plate 3 is closed. When the support platform 2 is closed, the locking hook 401 can also be automatically closed under the action of gravity. After closing, it is in a locked state and cannot be opened.

[0026] This invention mainly utilizes the principle of mechanical structure to connect the folding plate 3 and the supporting platform 2 together, preventing the folding plate 3 from moving forward under inertia when the vehicle brakes, which could easily cause it to collide with items or people inside the vehicle. After resetting, it will collide with the supporting platform 2, resulting in abnormal noise or abnormal wear, thus ensuring the safety and comfort of the vehicle and reducing noise pollution.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-locking mechanism for a folding tailgate of a vehicle crane, comprising a main board (1), characterized in that: It also includes a support platform (2) disposed on one side of the mounting motherboard (1), a folding plate (3) disposed on the top of the support platform (2), a locking mechanism (4) disposed on one side of the support platform (2) and the folding plate (3), a first hinge mechanism (5) disposed between the support platform (2) and the folding plate (3), a second hinge mechanism (6) disposed between the mounting motherboard (1) and the support platform (2), and a drive mechanism (7) disposed on the second hinge mechanism (6); The locking mechanism (4) includes a latch seat (45) disposed on one side of one end of the folding plate (3), a lock seat (41) disposed on one side of the bearing platform (2) near the latch seat (45), two sets of fixing plates (42) disposed on one end of the lock seat (41), an arc groove (44) disposed on the top of the fixing plate (42), and a latch (46) disposed on one side of the latch seat (45), wherein one end of the latch (46) passes through the two sets of fixing plates (42) through the two sets of arc grooves (44).

2. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 1, characterized in that: The locking mechanism (4) further includes a first connecting hole (43) opened on one side of the fixed plate (42), and the first connecting hole (43) penetrates the fixed plate (42), a pin (47) disposed inside the first connecting hole (43), and both ends of the pin (47) penetrate the fixed plate (42), a positioning seat (48) disposed at one end of the pin (47), an annular groove (49) disposed on the surface of the pin (47) away from the positioning seat (48), and a snap ring (40) disposed on the surface of the annular groove (49).

3. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 2, characterized in that: A locking hook (401) is provided between the two sets of fixing plates (42), and a second connecting hole (402) is provided on one side of the locking hook (401), and the second connecting hole (402) passes through the locking hook (401). The pin (47) passes through the locking hook (401) through the second connecting hole (402).

4. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 3, characterized in that: One end of the lock hook (401) is provided with an arc-shaped groove (403), and the surfaces of the arc-shaped groove (403) and the lock tongue (46) are in contact with each other. The end of the lock hook (401) away from the arc-shaped groove (403) is provided with a protrusion (404).

5. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 1, characterized in that: The first hinge mechanism (5) includes three sets of first mounting slots (51) disposed at one end of the top of the bearing platform (2), hinge sleeves (52) disposed on both sides of the inner cavity of the first mounting slots (51), three sets of second mounting slots (53) disposed at one end of the top of the folding plate (3), and connecting rods (54) disposed on both sides of the inner cavity of the second mounting slots (53), and the three sets of connecting rods (54) slide through the three sets of hinge sleeves (52) respectively.

6. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 5, characterized in that: The support platform (2) has support blocks (55) on both sides away from the folding plate (3), and the support blocks (55) are L-shaped.

7. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 6, characterized in that: The second hinge mechanism (6) includes a fixed hinge seat (61) disposed on both sides of one end of the mounting main board (1), a connecting plate (62) disposed at one end of the fixed hinge seat (61), a mounting rod (64) rotatably connected to one end of the connecting plate (62) away from the fixed hinge seat (61), and the mounting rod (64) rotatably connected to the bottom of one end of the bearing platform (2), and a connecting crossbar (63) disposed on one side of the two sets of connecting plates (62) close to each other.

8. The self-locking mechanism for the folding plate of a vehicle crane tailgate according to claim 7, characterized in that: The drive mechanism (7) includes a first hydraulic push rod (71) disposed on one side of the bottom of one end of the fixed hinge seat (61), a first hinge seat (72) disposed on the output end of the first hydraulic push rod (71), and the first hinge seat (72) is rotatably connected to the bottom of one end of the bearing platform (2), a second hydraulic push rod (73) disposed on the side of the bottom of one end of the fixed hinge seat (61) away from the first hydraulic push rod (71), and a second hinge seat (74) disposed on the bottom of the connecting plate (62) away from the fixed hinge seat (61), and the output end of the second hydraulic push rod (73) is fixedly connected to the second hinge seat (74).

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