A self-unloading vehicle rear door tilting type manual lock hook structure

Abstract

The utility model discloses a self -discharging car rear door inclination type manual lock hook structure, including manual lock hook body, manual lock hook body one end with the self -discharging car's car body rear stand -column rotatablely connected, and the other end with the rear door of self -discharging car is inclined type hook connection. The utility model has the advantages that: through setting up manual lock hook into the inclined type installation form, can change the stress distribution of manual lock hook, avoids local stress concentration, when bearing external force, can make manual lock hook more evenly scattered load, reduces the risk of manual lock hook damage due to stress concentration, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of manual locking hook technology for the rear door of dump trucks, specifically to a tilting manual locking hook structure for the rear door of a dump truck. Background Technology

[0002] Traditional dump truck rear door manual locking hook structures are generally horizontally installed, such as... Figure 1 As shown, this type of horizontally installed manual hook often fails to meet the needs of dump trucks under special working conditions. For example, when dump trucks unload on mountain roads or in sloping material yards, the vibration of the truck bed during vehicle movement due to the poor road conditions can cause relative displacement between the manual hook and the manual hook stop pin. This traditional horizontally installed type of manual hook, lacking vertical adjustment, is prone to unilateral impacts. For instance, when the vehicle is traveling or unloading on a sloping road surface where the left side is lower than the right, the left hook's stop pin shifts to the right relative to the hook due to the truck bed tilting to the left, concentrating the impact force on the hook's hook portion. On the right edge, due to the leftward tilt of the truck bed, the right-side locking hook shifts to the left relative to the locking hook, concentrating the impact force on the left edge of the locking hook. Over time, this may cause the locking hook to deform or break. During manual operation, the point of force applied by the hand may be biased towards one side of the locking hook. For example, when the right hand operates the right-side locking hook, the point of force applied by the hand may be biased towards the right edge of the locking hook, and when the left hand operates the left-side locking hook, the point of force applied by the hand may be biased towards the left edge of the locking hook. Long-term repeated unilateral loading will cause uneven wear on the connection part of the locking hook, leading to premature wear or accidental unlocking, thereby affecting the safety and reliability of the dump truck. Utility Model Content

[0003] The purpose of this utility model is to provide a tilted manual locking hook structure for the rear door of a dump truck, in order to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A tilted manual locking hook structure for the rear door of a dump truck includes a manual locking hook body. One end of the manual locking hook body is rotatably connected to the rear pillar of the dump truck body, and the other end is tiltedly hooked to the rear door of the dump truck.

[0006] Furthermore, when the manual hook body is hooked together with the rear door of the dump truck at an angle, the top surface of the manual hook body is set at an angle α relative to the bottom surface of the dump truck's cargo box, the bottom surface of the manual hook body is set at an angle β relative to the bottom surface of the dump truck's cargo box, and the central axis of the manual hook body along its long side is set at an angle θ relative to the bottom surface of the dump truck's cargo box. Both the angle α and the angle β are equal to the angle θ, and the angle θ is between 8° and 15°.

[0007] Furthermore, when the manual hook body is hooked together with the rear door of the dump truck at an angle, the top surface of the manual hook body is set at an angle α relative to the bottom surface of the dump truck's cargo box, the bottom surface of the manual hook body is set at an angle β relative to the bottom surface of the dump truck's cargo box, and the central axis of the long side of the manual hook body is set at an angle θ relative to the bottom surface of the dump truck's cargo box. Both the angle α and the angle β are equal to the angle θ, and the angle θ is 10°.

[0008] Furthermore, it also includes a manual locking hook shaft, which is fixedly installed on the rear pillar of the dump truck's cargo box, and the manual locking hook body is rotatably sleeved on the manual locking hook shaft.

[0009] Furthermore, it also includes a manual locking hook anti-jump plate, which is fixedly installed on the manual locking hook shaft and located on the side of the manual locking hook body near the rear column of the carriage.

[0010] Furthermore, it also includes a manual locking hook stop pin, which is fixedly installed on the rear door side panel of the dump truck and is used to cooperate with the manual locking hook body to lock the rear door of the dump truck.

[0011] Compared with the prior art, the advantages of this utility model are as follows: by setting the manual locking hook in an inclined installation form, the force distribution of the manual locking hook can be changed, avoiding local stress concentration; when subjected to external force, the manual locking hook can distribute the load more evenly, reducing the risk of damage to the manual locking hook due to stress concentration and extending its service life.

[0012] Specifically, this utility model avoids localized stress concentration in the following way:

[0013] Traditional horizontally installed manual locking hooks often have "line contact" or "point contact" between the hook (the hook body) and the lock seat (the hook stop pin), which easily leads to stress peaks at the contact edges. This invention, by designing the hook to be inclined to the lock seat, allows for surface contact, significantly reducing the stress per unit area and preventing localized stress concentration. Furthermore, when the vehicle is bumpy, the inclined hook can offset the lateral displacement caused by the vehicle's vibration through slight adjustments to the angle of the inclined surface. Compared to horizontally installed hooks (which are prone to unilateral impact during vibration), the inclined angle allows for "self-adaptive fine-tuning" within a certain range, ensuring the vibration load is evenly distributed across the entire contact surface, thus reducing localized stress overload caused by unilateral impact.

[0014] Specifically, this invention achieves uniform load distribution through the following method:

[0015] (1) By setting the manual locking hook to be inclined to engage with the manual locking hook stop pin, the meshing surfaces of the manual locking hook and the manual locking hook stop pin can form an inclined contact. When the material carried by the carriage generates downward pressure, this pressure will be decomposed into two components along the inclined surface formed by the manual locking hook and the manual locking hook stop pin: a positive pressure perpendicular to the inner side of the hook of the manual locking hook and the arc surface that directly contacts the manual locking hook stop pin, ensuring that the manual locking hook and the manual locking hook stop pin are tightly fitted; and a lateral component along the manual locking hook obliquely to the upper right, which transfers part of the load to the entire contact area of ​​the manual locking hook. This component force effect allows the load to spread from a single contact point to multiple components such as the hook and connecting shaft of the locking hook, thereby achieving "multi-point load sharing".

[0016] (2) By setting the manual lock hook to be inclined to engage with the manual lock hook stop pin, under the action of the car body's gravity, the manual lock hook will automatically fit into the manual lock hook stop pin due to the "self-tightening effect" of the inclined surface (similar to the wedge principle), reducing the gap. Even if there is a slight assembly error, the tilt angle can maximize the contact area between the manual lock hook and the manual lock hook stop pin through the slight sliding of the contact surface, avoiding local overload caused by the gap.

[0017] (3) By setting the manual lock hook to be inclined to engage with the manual lock hook stop pin, the point of force application of the hand is closer to the geometric center of the manual lock hook during manual operation, rather than biased to one side. Matching the direction of force application with the tilt angle can make the closing speed and force of the two ends of the lock hook more balanced, reduce the unilateral force concentration caused by the operation of the load, and further disperse the instantaneous load during the operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the traditional manual locking hook structure for the rear door of a dump truck.

[0020] Figure 2 This is a schematic diagram of the tilted manual locking hook structure for the rear door of a dump truck provided by this utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a force analysis diagram of the tilting manual locking hook of the rear door of the dump truck provided by this utility model when the cargo compartment is carrying materials and generates downward pressure.

[0023] Explanation of reference numerals in the attached drawings: 1. Manual locking hook body; 2. Manual locking hook pivot; 3. Manual locking hook anti-skid plate; 4. Manual locking hook stop pin; 5. Rear pillar of the carriage; 6. Rear door. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the appearance of the term "horizontal" does not mean that the component is required to be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] refer Figure 2 to Figure 3 , which shows a specific embodiment of the inclined manual lock hook structure for the rear door of a dump truck provided by the present utility model, comprising a manual lock hook body 1, one end of the manual lock hook body 1 is rotatably connected to the rear compartment pillar 5 of the dump truck, and the other end is in inclined hooking connection with the rear door 6 of the dump truck.

[0030] Specifically, in some specific embodiments, when the manual lock hook body 1 is in inclined hooking connection with the rear door 6 of the dump truck, the top surface of the manual lock hook body 1 is arranged at an inclination angle α relative to the bottom surface of the compartment floor of the dump truck, the bottom surface of the manual lock hook body 1 is arranged at an inclination angle β relative to the bottom surface of the compartment floor of the dump truck, the central axis of the manual lock hook body 1 along the long side direction is arranged at an inclination angle θ relative to the bottom surface of the compartment floor of the dump truck, and both the inclination angle α and the inclination angle β are equal to the inclination angle θ, wherein the inclination angle θ ranges from 8° to 15°.

[0031] More specifically, in some specific embodiments, when the manual lock hook body 1 is in inclined hooking connection with the rear door 6 of the dump truck, the top surface of the manual lock hook body 1 is arranged at an inclination angle α relative to the bottom surface of the compartment floor of the dump truck, the bottom surface of the manual lock hook body 1 is arranged at an inclination angle β relative to the bottom surface of the compartment floor of the dump truck, the central axis of the manual lock hook body 1 along the long side direction is arranged at an inclination angle θ relative to the bottom surface of the compartment floor of the dump truck, both the inclination angle α and the inclination angle β are equal to the inclination angle θ, and the inclination angle θ is 10°.

[0032] Specifically, in some specific embodiments, the inclined manual lock hook structure for the rear door of a dump truck provided by the present utility model further comprises a manual lock hook rotating shaft 2, the manual lock hook rotating shaft 2 is fixedly installed (e.g., welded and fixed) on the rear compartment pillar 5 of the dump truck, and the manual lock hook body 1 is rotatably sleeved on the manual lock hook rotating shaft 2. By the arrangement of the manual lock hook rotating shaft 2, it is convenient for the manual lock hook body 1 to rotate around the manual lock hook rotating shaft 2, so as to realize the rotatable connection between the manual lock hook body 1 and the rear compartment pillar 5.

[0033] Specifically, in some specific embodiments, the inclined manual lock hook structure for the rear door of a dump truck provided by the present utility model further comprises a manual lock hook jump prevention plate 3, and the manual lock hook jump prevention plate 3 is fixedly installed (e.g., welded and fixed) on the manual lock hook rotating shaft 2, and is located on the side of the manual lock hook body 1 close to the rear compartment pillar 5.

[0034] Specifically, in some embodiments, the tilting manual locking hook structure for the rear door of the dump truck provided by this utility model further includes a manual locking hook stop pin 4, which is fixedly installed (e.g., welded) on the side panel of the rear door of the dump truck for hooking and engaging with the manual locking hook body 1 to lock the rear door 6 of the dump truck. That is, when the manual locking hook body 1 and the manual locking hook stop pin 4 are hooked together, the rear door 6 of the dump truck can be locked; when the manual locking hook body 1 and the manual locking hook stop pin 4 are separated, the locking connection to the rear door 6 of the dump truck can be released.

[0035] Compared with the traditional manual locking hook structure for the rear door of a dump truck, the tilted manual locking hook structure for the rear door of a dump truck provided by this utility model has the following advantages: it can change the force distribution of the manual locking hook and avoid local stress concentration; when subjected to external force, it can make the manual locking hook distribute the load more evenly, reduce the risk of damage to the manual locking hook due to stress concentration, and extend its service life.

[0036] Specifically, the tilted manual locking hook structure for the rear door of the dump truck provided by this utility model avoids local stress concentration in the following way:

[0037] Traditional horizontally installed manual locking hooks often have "line contact" or "point contact" between the hook (the hook body) and the lock seat (the hook stop pin), which easily leads to stress peaks at the contact edges. This invention, by designing the hook to be inclined to the lock seat, allows for surface contact, significantly reducing the stress per unit area and preventing localized stress concentration. Furthermore, when the vehicle is bumpy, the inclined hook can offset the lateral displacement caused by the vehicle's vibration through slight adjustments to the angle of the inclined surface. Compared to horizontally installed hooks (which are prone to unilateral impact during vibration), the inclined angle allows for "self-adaptive fine-tuning" within a certain range, ensuring the vibration load is evenly distributed across the entire contact surface, thus reducing localized stress overload caused by unilateral impact.

[0038] Specifically, the tilted manual locking hook structure for the rear door of the dump truck provided by this utility model achieves uniform load distribution in the following way:

[0039] (1) By setting the manual locking hook to be inclined to engage with the manual locking hook stop pin, the meshing surfaces of the manual locking hook and the manual locking hook stop pin can form an inclined contact. See also Figure 4When the material carried in the carriage generates downward pressure F, this pressure F is decomposed into two components along the inclined surface formed by the manual hook and the manual hook stop pin: a normal force F1 perpendicular to the arc-shaped surface of the hook's inner side that directly contacts the manual hook stop pin, ensuring a tight fit between the manual hook and the stop pin; and a lateral force F2 diagonally upward and to the right along the manual hook, transferring part of the load to the entire contact area of ​​the manual hook. This force distribution effect allows the load to spread from a single contact point to multiple components such as the hook and connecting shaft, thus achieving "multi-point load sharing".

[0040] (2) By setting the manual lock hook to be inclined to engage with the manual lock hook stop pin, under the action of the car body's gravity, the manual lock hook will automatically fit into the manual lock hook stop pin due to the "self-tightening effect" of the inclined surface (similar to the wedge principle), reducing the gap. Even if there is a slight assembly error, the tilt angle can maximize the contact area between the manual lock hook and the manual lock hook stop pin through the slight sliding of the contact surface, avoiding local overload caused by the gap.

[0041] (3) By setting the manual lock hook to be inclined to engage with the manual lock hook stop pin, the point of force application of the hand is closer to the geometric center of the manual lock hook during manual operation, rather than biased to one side. Matching the direction of force application with the tilt angle can make the closing speed and force of the two ends of the lock hook more balanced, reduce the unilateral force concentration caused by the operation of the load, and further disperse the instantaneous load during the operation.

[0042] Finally, it should be noted that the above description is only an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tilting manual locking hook structure for the rear door of a dump truck, comprising a manual locking hook body (1), characterized in that: One end of the manual locking hook body (1) is rotatably connected to the rear column (5) of the dump truck, and the other end is inclinedly hooked to the rear door (6) of the dump truck.

2. The tilting manual locking hook structure for the rear door of a dump truck according to claim 1, characterized in that: When the manual hook body (1) is hooked together with the rear door (6) of the dump truck at an incline, the top surface of the manual hook body (1) is set at an incline angle α relative to the bottom surface of the dump truck's cargo box, the bottom surface of the manual hook body (1) is set at an incline angle β relative to the bottom surface of the dump truck's cargo box, and the central axis of the manual hook body (1) along the long side is set at an incline angle θ relative to the bottom surface of the dump truck's cargo box. The incline angles α and β are equal to the incline angle θ, and the incline angle θ is 8°~15°.

3. The tilting manual locking hook structure for the rear door of a dump truck according to claim 2, characterized in that: The tilt angle θ is set to 10°.

4. The tilting manual locking hook structure for the rear door of a dump truck according to any one of claims 1 to 3, characterized in that: It also includes a manual hook rotating shaft (2), which is fixedly installed on the rear column (5) of the dump truck body, and the manual hook body (1) is rotatably sleeved on the manual hook rotating shaft (2).

5. The tilting manual locking hook structure for the rear door of a dump truck according to claim 4, characterized in that: It also includes a manual lock hook anti-jump plate (3), which is fixedly installed on the manual lock hook shaft (2) and located on the side of the manual lock hook body (1) near the rear column (5) of the carriage.

6. The tilting manual locking hook structure for the rear door of a dump truck according to claim 5, characterized in that: It also includes a manual locking hook stop pin (4), which is fixedly installed on the rear door side panel of the dump truck and is used to hook and cooperate with the manual locking hook body (1) to lock the rear door (6) of the dump truck.

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