A transport vehicle

Abstract

The utility model discloses a transport vehicle, including frame and car hopper, the car hopper is hinged with the frame, still be connected with the locking mechanism for preventing car hopper to overturn between the car hopper and the frame, the locking mechanism includes locking fixed part, locking movable part and operating mechanism, locking movable part is under the action of operating mechanism and locking fixed part and engages cooperation, locking fixed part is connected with the car hopper, locking movable part is movably connected with the frame, locking movable part has the locking portion along the perpendicular to the rotation axis direction of car hopper and locking fixed part and engages cooperation.

Description

Technical Field

[0001] This utility model relates to a transport vehicle. Background Technology

[0002] Existing small transport vehicles are transport devices with a tilting cargo bed attached to a frame. Tilting the cargo bed significantly improves the unloading efficiency of the transport vehicle. To achieve tilting, one end of the cargo bed is typically hinged to the frame, allowing the cargo bed to rotate around the hinge point. However, considering the stability of the cargo bed during transport and preventing it from tilting due to road bumps, a locking mechanism is installed between the end of the cargo bed furthest from the hinge point and the frame. This locking mechanism keeps the cargo bed fixed to the frame, preventing it from tilting during transport.

[0003] Chinese patent document CN221137830U discloses a vehicle body locking and tipping mechanism, including a vehicle chassis and a vehicle body. The mechanism is characterized by: a vertical plate fixedly connected to the top of the vehicle chassis; one end of the vehicle body being rotatably connected to the top of the vertical plate via a rotating shaft; a gas spring rotatably connected to the other end of the vehicle body and the vertical plate via a pin; a handle tube bolted to the other end of the vehicle body; a handle assembly mounted on the handle tube; and a locking assembly between the other end of the vehicle body and the vehicle chassis. The locking assembly includes a mounting post fixed to the lower part of the other end of the vehicle body and a limiting post fixed to the vehicle chassis. A hook is rotatably connected to the outer circumference of the mounting post, and the hook is connected to the handle assembly via a pull line.

[0004] In the aforementioned existing technical solutions, the locking and fixing function between the truck bed and the chassis is achieved by setting a limiting post and a hook. However, when the transport vehicle is traveling on uneven roads, the truck bed is prone to swaying from side to side, which can easily cause the hook and the limiting post to disengage, resulting in the failure of the locking assembly. Consequently, the truck bed may easily tip over, leading to a transportation accident. Utility Model Content

[0005] The purpose of this utility model is to provide a transport vehicle to solve the problem in the prior art where the cargo bed is prone to tipping over due to the failure of the locking mechanism.

[0006] To achieve the above objectives, the basic solution of this utility model provides a transport vehicle, including a frame and a cargo box. The cargo box is hinged to the frame, and a locking mechanism for preventing the cargo box from tipping over is also connected between the cargo box and the frame. The locking mechanism includes a locking fixing member, a locking movable member, and an operating mechanism. The locking movable member engages and disengages with the locking fixing member under the action of the operating mechanism. The locking fixing member is connected to the cargo box, and the locking movable member is movably connected to the frame. The locking movable member has a locking portion that engages and disengages with the locking fixing member along a direction perpendicular to the rotation axis of the cargo box.

[0007] The beneficial effects of this basic solution are as follows: by employing a locking part that engages and disengages with the locking fixing part along a direction perpendicular to the rotation axis of the truck bed, the locking part moves along a direction perpendicular to the rotation axis of the truck bed to achieve mutual engagement and disengagement with the locking moving part. Thus, when the truck bed sways in a direction parallel to the rotation axis, the relative movement direction between the locking fixing part and the locking moving part is perpendicular to the locking movement direction of the locking part. This avoids the situation where the locking part disengages from the locking fixing part due to the relative movement between the locking fixing part and the locking moving part, thereby preventing the truck bed from overturning due to the failure of the locking mechanism when the transport vehicle is traveling on uneven roads.

[0008] Preferably, the locking mechanism is hinged to the frame, and the axis of rotation of the locking mechanism is parallel to the axis of rotation of the truck bed. This arrangement allows the locking part to move by rotating the locking mechanism along its hinge point with the frame, simplifying the connection between the locking mechanism and the frame and thus improving the reliability and ease of operation of the locking mechanism.

[0009] Preferably, the locking part is located on the side of the locking fastener closer to the rotation axis of the truck bed. This arrangement ensures that the space required for the locking part to move is located on the lower side of the truck bed, thus avoiding the problem of increased horizontal dimensions of the transport vehicle due to the need for operating space on the side of the truck bed when the locking part's movement space is located on the side of the truck bed. This, in turn, helps to reduce the volume of the transport vehicle.

[0010] Preferably, the operating mechanism includes an operating arm hinged to the vehicle frame, and a linkage for driving the locking movable member to rotate is connected between the operating arm and the locking movable member. This arrangement allows the operating arm to rotate along the hinge point, thereby driving the linkage to move the locking movable member. This simplifies the structure of the operating mechanism and improves operational reliability.

[0011] Preferably, the linkage is a rigid connecting rod, with one end hinged to the operating arm and the other end hinged to the locking movable component. This configuration allows the movement of the operating arm to be transmitted to the locking movable component in real time via the linkage. Furthermore, the rigid connecting rod enables the linkage to exert opposing pulling and pushing forces on the locking movable component, allowing the operating arm to control both the engagement and disengagement of the locking movable component and the locking fixed component, thereby improving the reliability of the locking mechanism.

[0012] Preferably, an elastic element is connected between the locking movable member and the frame to maintain the engagement tendency between the locking part and the locking fixed member. This arrangement, by maintaining the engagement tendency between the locking part and the locking fixed member through the elastic element, further reduces the occurrence of the locking part and the locking fixed member separating spontaneously due to external forces in the engaged state, thereby improving the reliability of the locking mechanism.

[0013] Preferably, the operating arm, linkage, locking mechanism, and frame constitute a four-bar linkage with a dead-point position. A positioning element is connected to the frame to locate the dead-point position of the operating arm when the locking mechanism is in the unlocked state. With this configuration, when the locking mechanism is in the unlocked state, the positioning element accurately locates the dead-point position of the operating arm. Therefore, when the operating arm is rotated to switch the locking mechanism from the locked state to the unlocked state, when the operating arm moves to contact the positioning element, it is precisely at the dead-point position. At this point, the locking mechanism cannot be driven to rotate by the linkage under the action of the elastic element, thus keeping the locking mechanism in the unlocked state. This eliminates the need for additional components to keep the locking mechanism in the unlocked state, simplifying the structure and improving reliability. In actual use, the operator can prevent the operating arm from moving further by pulling it into contact with the positioning part. At this point, the operating arm is in the dead position, the locking moving part remains unlocked, and the operating arm can remain stationary without the operator having to apply continuous force. This allows the operator to perform other operations, thereby improving ease of use and reducing the difficulty of using the transport vehicle.

[0014] This utility model has the following beneficial effects: This solution avoids the locking mechanism from failing when the transport vehicle is traveling on uneven roads, thus preventing the cargo bed from tipping over and causing accidents, and improving the safety of the transport vehicle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the cooperation of the cargo bed, frame, and locking mechanism of a transport vehicle according to this utility model; Figure 2This is a schematic diagram of the locking mechanism of a transport vehicle of the present invention in the locked state; Figure 3 This is a schematic diagram of the locking mechanism of a transport vehicle of the present invention in the unlocked state. Detailed Implementation

[0016] As those skilled in the art will know, the "cart bed" in this invention refers to a component in a transport vehicle used for loading goods, sometimes also called a "carriage". As those skilled in the art will know, the rotation axis in this invention refers to a fixed straight line around which an object rotates. As those skilled in the art will know, the purpose of the movable connection between the locking component and the frame is to enable the movement of the locking part; therefore, in addition to the hinged connection listed in the embodiments of this invention, the specific movable connection method can also be a sliding connection, etc. As those skilled in the art will know, the dead point position refers to the position in a planar linkage mechanism where, when the transmission angle on the driven member is equal to zero, the effective rotational torque of the driving force on the driven member is zero. This position is called the dead point position of the mechanism, that is, the position where the driven member and the connecting rod are collinear in the mechanism is called the dead point position of the mechanism.

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Cargo bed; 2. First pivot; 3. Frame; 4. Locking movable part; 41. Locking part; 5. Second pivot; 6. Locking fixed part; 7. Linkage part; 8. Third pivot; 9. Operating arm; 10. Elastic part.

[0018] The basic implementation examples are as follows: Figure 1 , Figure 2 and Figure 3As shown: A transport vehicle includes a frame 3 and a cargo box 1. The cargo box 1 is hinged to the frame 3, and a locking mechanism for preventing the cargo box 1 from tipping over is also connected between the cargo box 1 and the frame 3. In this embodiment, the cargo box 1 and the frame 3 are preferably hinged via a first pivot 2, allowing the cargo box 1 to rotate around the first pivot 2 to achieve the tipping operation. Therefore, the axis of the first pivot 2 is the axis of rotation of the cargo box 1. The locking mechanism includes a locking fixing member 6, a locking movable member 4, and an operating mechanism. The locking movable member 4 engages and disengages with the locking fixing member 6 under the action of the operating mechanism. The locking fixing member 6 is connected to the cargo box 1, and the locking movable member 4 is movably connected to the frame 3. The locking movable member 4 has a locking portion 41 that engages and disengages with the locking fixing member 6 along a direction perpendicular to the axis of rotation of the cargo box 1. When the locking portion 41 engages with the locking fixing member 6, the locking fixing member 6 will not separate from the locking movable member 4 under the restraining effect of the locking portion 41. Specifically, in this embodiment, the locking fastener 6 is connected and fixed to the bottom of the truck bed 1. The locking fastener 6 is provided with a receiving hole. When the locking part 41 is inserted into the receiving hole, it is the combined state between the locking part 41 and the locking fastener 6. At this time, the entire locking mechanism is also in the locked state. At this time, the truck bed 1 cannot be overturned under the action of the locking mechanism. When the locking part 41 is outside the receiving hole, it is the separated state between the locking part 41 and the locking fastener 6. At this time, the entire locking mechanism is also in the unlocked state. At this time, the truck bed 1 loses the locking effect of the locking mechanism and is in a state where it can be overturned.

[0019] In this embodiment, the locking movable member 4 is hinged to the frame 3, and the rotation axis of the locking movable member 4 is parallel to the rotation axis of the truck bed 1. Preferably, the locking movable member 4 and the frame 3 are hinged via a second pivot 5, allowing the locking movable member 4 to rotate around the second pivot 5 to move the locking part 41. Therefore, the axis of the second pivot 5 is the rotation axis of the locking movable member 4; the second pivot 5 is parallel to the first pivot 2. The locking part 41 is located on the side of the locking fixing member 6 closest to the rotation axis of the truck bed 1, allowing the locking part 41 to move in the space below the truck bed 1, reducing the space occupied on the side of the truck bed 1. The operating mechanism includes an operating arm 9 hinged to the frame 3, and a linkage member 7 for driving the locking movable member 4 to rotate is connected between the operating arm 9 and the locking movable member 4. In this embodiment, the operating arm 9 and the frame 3 support are hinged via a third pivot 8, allowing the operating arm 9 to rotate relative to the frame 3 under the rotational support of the third pivot 8. In this embodiment, the third pivot 8 is preferably arranged parallel to the second pivot 5. In this embodiment, the linkage 7 is preferably a rigid connecting rod, with one end of the linkage 7 hinged to the operating arm 9 and the other end hinged to the locking movable member 4, so that the linkage 7 can transmit both tensile and thrust forces, allowing the operating arm 9 to operate the engagement and disengagement between the locking part 41 and the locking fixing member 6. Preferably, the operating arm 9 is located on the side of the truck bed 1, the hinge point between the linkage 7 and the operating arm 9 is located above the hinge point between the operating arm 9 and the frame 3, and the hinge point between the linkage 7 and the locking movable member 4 is located below the hinge point between the locking movable member 4 and the frame 3, so that when the operating arm 9 swings towards the truck bed 1, the locking part 41 engages with the locking fixing member 6, and vice versa when the operating arm 9 swings away from the truck bed 1, the locking part 41 disengages from the locking fixing member 6. An elastic element 10 is connected between the locking movable member 4 and the frame 3 to maintain the locking part 41 and the locking fixing member 6 in a engaged state. In this embodiment, the elastic element 10 is preferably a torsion spring.

[0020] In this embodiment, the operating arm 9, the linkage 7, the locking movable member 4, and the frame 3 form a four-bar linkage mechanism with a dead point position. A positioning member is connected to the frame 3 to position the operating arm 9 at its dead point when the locking movable member 4 is in the unlocked state. The positioning member allows the operating arm to swing quickly and accurately to the dead point position, improving operational convenience. For example, the positioning member can be a positioning post fixed to the frame 3. When the operating arm 9 swings to contact the positioning post and remains stationary, it has reached its dead point position, thus achieving accurate positioning of the dead point position of the operating arm 9. In this embodiment, when the locking movable member 4 is in the unlocked state and the operating arm 9 is in the dead point position, the locking movable member 4, under the action of the torsion spring, cannot pull the operating arm 9 to rotate via the linkage 7, thus keeping the locking movable member 4 in the unlocked state.

[0021] The specific implementation process is as follows: Under normal conditions, the locking mechanism between the truck bed 1 and the frame 3 is in a locked state, preventing the truck bed 1 from tipping over and thus ensuring transportation safety. By swinging the operating arm 9 towards the truck bed 1, the operating arm 9 drives the locking movable part 4 to rotate via the linkage 7. This causes the locking part 41 on the locking movable part 4 to move towards the locking fixing part 6 and engage with it. The locking part 41 is inserted into the receiving hole on the locking fixing part 6, preventing the locking fixing part 6 from disengaging on its own. Consequently, the truck bed 1 cannot tip over. Furthermore, during the operation of the transport vehicle, the left and right swaying of the truck bed 1 will not cause the locking movable part 4 to disengage from the locking fixing part 6, improving the reliability of the locking mechanism and further enhancing the safety of the transport vehicle. When it is necessary to flip the truck bed 1, the operating arm 9 is swung away from the truck bed 1. The operating arm 9 drives the locking movable part 4 to rotate through the linkage 7, so that the locking part 41 moves away from the locking fixed part 6. Finally, the locking part 41 is moved out of the receiving hole of the locking fixed part 6, so that the locking movable part 4 is separated from the locking fixed part 6, and the locking mechanism is in the unlocked state. Thus, the locking fixed part 6 loses the restrictive effect of the locking movable part 4 and can move freely. In turn, the truck bed 1 loses the locking effect of the locking mechanism and can be flipped.

[0022] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A transport vehicle, comprising a frame and a cargo box, wherein the cargo box is hinged to the frame, and a locking mechanism for preventing the cargo box from tipping over is further connected between the cargo box and the frame; the locking mechanism comprises a locking fixing member, a locking movable member, and an operating mechanism, wherein the locking movable member engages and disengages with the locking fixing member under the action of the operating mechanism, characterized in that: The locking fastener is connected to the truck bed, and the locking movable member is movably connected to the truck frame. The locking movable member has a locking part that engages and disengages with the locking fastener along a direction perpendicular to the rotation axis of the truck bed.

2. A transport vehicle according to claim 1, characterized in that: The locking mechanism is hinged to the frame, and the axis of rotation of the locking mechanism is parallel to the axis of rotation of the truck bed.

3. A transport vehicle according to claim 2, characterised in that: The locking part is located on the side of the locking fastener that is closer to the rotation axis of the truck bed.

4. A transport vehicle according to claim 1, 2 or 3, characterised in that: The operating mechanism includes an operating arm hinged to the vehicle frame, and a linkage for driving the locking movable part to rotate is connected between the operating arm and the locking movable part.

5. A transport vehicle according to claim 4, characterised in that: The linkage is a rigid connecting rod, with one end hinged to the operating arm and the other end hinged to the locking movable part.

6. A transport vehicle according to claim 5, characterized in that: An elastic element is connected between the locking movable member and the frame to maintain the locking part and the locking fixed member in a tendency to engage.

7. A transport vehicle according to claim 6, characterised in that: The operating arm, linkage, locking mechanism, and frame together form a four-bar linkage with a dead point position. The frame is equipped with a positioning component for positioning the dead point position of the operating arm when the locking mechanism is in the unlocked state.

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