Tail door locking device

Abstract

The utility model provides a tail door locking device which comprises an oil cylinder locking mechanism and a locking pull rod mechanism, the oil cylinder locking mechanism comprises an oil cylinder seat fixedly arranged on a truck bed, an oil cylinder is arranged on the oil cylinder seat, and a wedge-shaped lock head is connected to a piston rod of the oil cylinder; the locking pull rod mechanism comprises a locking pull rod seat fixedly arranged on the tail door, a locking pull rod is hinged to the locking pull rod seat, and a locking groove is formed in the locking pull rod; when the tail door is closed, the oil cylinder drives the wedge-shaped lock head to be inserted into the locking groove. The utility model solves the problem that the conventional locking mechanism for the tail door of the kitchen waste truck is easy to cause the damage of the inserted link.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a tailgate locking device. Background Art

[0002] At present, the mainstream tailgate locking mechanism of kitchen garbage trucks on the market generally adopts a fixed plug rod arranged on the tailgate, and a locking cylinder is arranged at the corresponding position on the garbage box. When the tailgate is closed, the plug rod is inserted into the space reserved by the locking cylinder seat, and then the locking cylinder pushes the wedge-shaped lock head downward. During the downward movement, the inclined surface of the front side of the wedge-shaped lock head forcibly pushes the inner wall of the square hole in the middle of the plug rod, gradually tightening and locking the plug rod. Since the plug rod will be forcibly bent each time it is locked by the wedge-shaped lock head, and will remain in the bent state for a long time, the resulting tiny plastic deformation will gradually accumulate, causing the plug rod to bend significantly after long-term use. At this time, when the tailgate is closed again, the plug rod will directly hit the locking cylinder seat, causing damage to the plug rod. At the same time, in order to cope with the elastic changes of the tailgate sealing strip, the tailgate rotating hinge of the food garbage truck is usually designed to be adjustable. When the position of the tailgate rotating hinge changes, the position of the tailgate plug rod will also change accordingly, which usually causes the wedge-shaped lock to give the plug rod a greater twisting force, causing the plug rod to bend and deform faster, and then collide with the locking cylinder seat and cause damage. Therefore, it is necessary to invent a new tailgate locking device. Utility Model Content

[0003] The utility model aims to provide a tailgate locking device to solve the problem that the existing tailgate locking mechanism of a kitchen garbage truck is prone to damage to the insertion rod.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A vehicle tailgate locking device comprises a cylinder locking mechanism and a locking rod mechanism, wherein the cylinder locking mechanism comprises a cylinder seat fixedly arranged on a vehicle body, the cylinder seat is provided with a cylinder, and a wedge-shaped locking head is connected to the piston rod of the cylinder; the locking rod mechanism comprises a locking rod seat fixedly arranged on the tailgate, a locking rod is hingedly connected to the locking rod seat, and a locking groove is provided on the locking rod; when the tailgate is closed, the cylinder drives the wedge-shaped locking head to be inserted into the locking groove.

[0006] Furthermore, the piston rod of the oil cylinder extends into the oil cylinder seat from top to bottom, the wedge-shaped lock head is fixedly connected to the lower end of the piston rod, and the inclined surface of the wedge-shaped lock head is arranged away from the rear end of the vehicle.

[0007] Furthermore, a first guide plate and a second guide plate for allowing the wedge-shaped locking head to pass through are respectively provided near the middle and the bottom of the oil cylinder seat.

[0008] Furthermore, the second guide plate is provided with a guide hole for the wedge-shaped lock to pass through, and guide inclined panels adapted to the locking rod are provided in parallel on the left and right sides of the guide hole, and the inclined surface on the guide inclined panel transitions from high to low from the front to the rear of the vehicle.

[0009] Furthermore, a pull rod hole is provided on one side of the oil cylinder seat opposite to the locking pull rod seat, and when the tailgate is closed, the locking pull rod extends into the pull rod hole.

[0010] Furthermore, a roller mechanism is provided on one side of the locking rod close to the oil cylinder seat, and when the tailgate is closed, the wedge-shaped lock head is inserted into the locking groove and contacts the roller mechanism.

[0011] Furthermore, the roller mechanism comprises a roller pin connected to the locking rod, and the roller pin is sleeved with a bearing and a roller; when the tailgate is closed, the wedge-shaped lock head contacts the roller.

[0012] Furthermore, a limit plate is fixedly arranged on the locking pull rod, and the locking groove is arranged between the roller and the limit plate.

[0013] Furthermore, a hinge plate is fixedly connected to one side of the locking rod seat close to the oil cylinder seat, and the hinge plate is hinged to one side of the locking rod via a rotating shaft.

[0014] Furthermore, a supporting plate for lifting the locking rod is fixedly connected to the lower end of the locking rod seat, and the lower end of the hinged plate is fixedly connected to the upper end of the supporting plate.

[0015] Beneficial effects of the utility model: The utility model solves the problem that the existing tailgate plug rod of the kitchen garbage truck is easy to bend and deform, which leads to interference and collision. By installing a self-adaptive rotating locking rod on the tailgate to replace the traditional fixed plug rod, the locking rod always only bears radial tension during the process of being tightened by the locking cylinder wedge lock head, and will not bend and deform additionally. At the same time, the contact part between the pull rod and the cylinder wedge lock head is changed to a roller structure, which further reduces the mutual wear between the cylinder wedge lock head and the pull rod during the tailgate locking process, and prolongs the service life of the locking mechanism.

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural assembly diagram of a tailgate locking device.

[0018] Figure 2 The utility model is a front view of the assembly structure of a tailgate locking device.

[0019] Figure 3 for Figure 2 A magnified view of the structure of part I.

[0020] Figure 4 This is a diagram of the oil cylinder locking mechanism in the utility model.

[0021] Figure 5 This is a diagram of the locking rod mechanism in the utility model. DETAILED DESCRIPTION

[0022] like Figures 1 to 5 A tailgate locking device shown in the figure includes a cylinder locking mechanism 1 and a locking rod mechanism 2. The cylinder locking mechanism 1 includes a cylinder seat 11 fixedly arranged on a vehicle body 10, on which a cylinder 12 is arranged, and a wedge-shaped lock head 13 is connected to the piston rod of the cylinder 12; the locking rod mechanism 2 includes a locking rod seat 21 fixedly arranged on a tailgate 20, on which a locking rod 23 is hingedly connected, and a locking groove 232 is arranged on the locking rod 23; when the tailgate 20 is closed, the cylinder 12 drives the wedge-shaped lock head 13 to be inserted into the locking groove 232.

[0023] Preferably, in combination with the above scheme, in order to facilitate the wedge-shaped lock head 13 to move downward, drive the locking rod 23 to move toward the front of the vehicle and lock the tailgate 20, the piston rod of the cylinder 12 extends from top to bottom into the cylinder seat 11, and the wedge-shaped lock head 13 is fixedly connected to the lower end of the piston rod, and the inclined surface of the wedge-shaped lock head 13 is set away from the rear of the vehicle.

[0024] Preferably, in combination with the above scheme, in order to facilitate the movement and guidance of the wedge-shaped lock head 13 and increase the structural stability of the cylinder seat 11, the cylinder seat 11 is respectively provided with a first guide plate 111 and a second guide plate 112 near the middle and the bottom for allowing the wedge-shaped lock head 13 to pass through.

[0025] Preferably, in combination with the above scheme, in order to facilitate the locking rod 23 to move along the guide inclined surface and lock the tailgate 20, a guide hole 114 for allowing the wedge-shaped lock head 13 to pass through is provided on the second guide plate 112, and guide inclined panels 113 adapted to the locking rod 23 are provided in parallel on the left and right sides of the guide hole 114, and the inclined surface on the guide inclined panel 113 transitions from high to low from the front to the rear of the vehicle.

[0026] Preferably, in combination with the above solution, in order to facilitate the insertion and cooperation of the wedge-shaped lock 13, a rod hole 115 is opened on the side of the cylinder seat 11 relative to the locking rod seat 21, and when the tailgate 20 is closed, the locking rod 23 extends into the rod hole 115.

[0027] Preferably, in combination with the above-mentioned solution, in order to further reduce the mutual wear between the wedge-shaped lock head 13 and the locking rod 23 during the locking process of the tailgate 20 and extend the service life of the locking mechanism, a roller mechanism is provided on the side of the locking rod 23 close to the cylinder seat 11. When the tailgate 20 is closed, the wedge-shaped lock head 13 is inserted into the locking groove 232 and contacts the roller mechanism.

[0028] Preferably, in combination with the above scheme, in order to better design the rotational connection of the roller mechanism, the roller mechanism includes a roller pin 24 connected to the locking rod 23, and the roller pin 24 is sleeved with a bearing and a roller 25; when the tailgate 20 is closed, the wedge-shaped lock head 13 contacts the roller 25.

[0029] Preferably, in combination with the above solution, in order to better cooperate with the insertion and limiting of the wedge-shaped lock head 13 , a limiting plate 231 is fixedly provided on the locking rod 23 , and the locking groove 232 is provided between the roller 25 and the limiting plate 231 .

[0030] Preferably, in combination with the above solution, in order to facilitate the design of the hinged structure, a hinge plate 211 is fixedly connected to the locking rod seat 21 on one side close to the cylinder seat 11 , and the hinge plate 211 is hinged to one side of the locking rod 23 through the rotating shaft 22 .

[0031] Preferably, in combination with the above scheme, in order to prevent the locking rod 23 from sagging and to facilitate insertion into the rod hole 115 when the tailgate 20 is closed, the lower end of the locking rod seat 21 is fixedly connected to a support plate 212 for lifting the locking rod 23, and the lower end of the hinged plate 211 is fixedly connected to the upper end of the support plate 212.

[0032] Principle of the utility model:

[0033] When the tailgate 20 is opened and the door frame is parallel to the ground, the locking rod 23 will naturally droop under the action of its own gravity, and at this time, the locking rod 23 is not in contact with the support plate 212;

[0034] When the tailgate 20 starts to close, after the tailgate 20 rotates to a certain angle, the locking rod 23 will be pressed on the support plate 212 under the action of its own gravity and continue to swing down with the tailgate, and this state will be maintained until the front end of the locking rod 23 contacts the guiding inclined plate 113;

[0035] The tailgate 20 continues to descend, pushing the locking rod 23 to continue to move forward, and the front end of the locking rod 23 slides forward along the inclined surface of the guide inclined panel 113, and the locking rod 23 rotates around the rotating shaft 22 while being lifted;

[0036] After the tailgate 20 rotates to the predetermined position, the cylinder 12 starts to work, and the wedge-shaped lock head 13 moves downward and inserts into the locking groove 232 of the locking rod 23. After contacting the roller 25 at the front end of the locking rod 23, the inclined surface of the wedge-shaped lock head 13 pushes the roller 25 to move forward, pulling the front end of the locking rod 23 to continue to slide forward along the inclined surface of the guide inclined panel 113 until the tailgate 20 is completely locked and the working process is completed.

[0037] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "bottom", "inside", "outside", "one end", "one side", "two ends", "both sides", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] The utility model is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or they are directly applied to other occasions, they all fall within the protection scope of the utility model.

Claims

1. A tailgate locking device, characterized in that: The invention comprises a cylinder locking mechanism (1) and a locking rod mechanism (2), wherein the cylinder locking mechanism (1) comprises a cylinder seat (11) fixedly arranged on a vehicle body (10), a cylinder (12) being arranged on the cylinder seat (11), and a wedge-shaped lock head (13) being connected to the piston rod of the cylinder (12); the locking rod mechanism (2) comprises a locking rod seat (21) fixedly arranged on a tailgate (20), a locking rod (23) being hingedly connected to the locking rod seat (21), and a locking groove (232) being arranged on the locking rod (23); when the tailgate (20) is closed, the cylinder (12) drives the wedge-shaped lock head (13) to be inserted into the locking groove (232).

2. The tailgate locking device according to claim 1, characterized in that: The piston rod of the oil cylinder (12) extends from top to bottom into the oil cylinder seat (11), the wedge-shaped lock head (13) is fixedly connected to the lower end of the piston rod, and the inclined surface of the wedge-shaped lock head (13) is arranged away from the rear end of the vehicle.

3. The tailgate locking device according to claim 2, characterized in that: A first guide plate (111) and a second guide plate (112) for allowing the wedge-shaped lock head (13) to pass through are respectively arranged near the middle and at the bottom of the oil cylinder seat (11).

4. The tailgate locking device according to claim 3, characterized in that: The second guide plate (112) is provided with a guide hole (114) for the wedge-shaped lock head (13) to pass through, and guide inclined panels (113) adapted to the locking rod (23) are arranged in parallel on the left and right sides of the guide hole (114), and the inclined surface on the guide inclined panel (113) transitions from high to low in the direction from the front to the rear of the vehicle.

5. The tailgate locking device according to claim 1, characterized in that: A rod hole (115) is provided on one side of the oil cylinder seat (11) opposite to the locking rod seat (21). When the tailgate (20) is closed, the locking rod (23) extends into the rod hole (115).

6. The tailgate locking device according to claim 1, characterized in that: A roller mechanism is provided on one side of the locking rod (23) close to the oil cylinder seat (11). When the tailgate (20) is closed, the wedge-shaped lock head (13) is inserted into the locking groove (232) and contacts the roller mechanism.

7. The tailgate locking device according to claim 6, characterized in that: The roller mechanism comprises a roller pin (24) connected to a locking rod (23), and a bearing and a roller (25) are sleeved on the roller pin (24); when the tailgate (20) is closed, the wedge-shaped lock head (13) contacts the roller (25).

8. The tailgate locking device according to claim 7, characterized in that: A limiting plate (231) is fixedly arranged on the locking pull rod (23), and the locking groove (232) is arranged between the roller (25) and the limiting plate (231).

9. The tailgate locking device according to claim 1, characterized in that: A hinge plate (211) is fixedly connected to one side of the locking rod seat (21) close to the oil cylinder seat (11), and the hinge plate (211) is hinged to one side of the locking rod (23) via a rotating shaft (22).

10. The tailgate locking device according to claim 9, characterized in that: The lower end of the locking rod seat (21) is fixedly connected to a supporting plate (212) for supporting the locking rod (23), and the lower end of the hinged plate (211) is fixedly connected to the upper end of the supporting plate (212).

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