Locking device and dumper

Abstract

The utility model provides a locking device and a dumper, and relates to the technical field of vehicle engineering. The locking device provided by the utility model comprises a connecting rod seat which is fixed at the tail part of an auxiliary frame; the support is fixedly mounted on a bottom plate of the container; the tail hook assembly comprises at least two tail hooks and a linkage shaft, and the two tail hooks are rotationally connected to the support through the linkage shaft; the two ends of the connecting rod assembly are rotationally connected to the connecting rod base and the tail hook assembly correspondingly. The locking device provided by the utility model has better locking force and locking stability on the container.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle engineering, and in particular to a locking device and a dump truck. BACKGROUND

[0002] At present, a single tail hook locking device fixed by welding is commonly used in dump trucks, which has the following technical defects: 1) the tail hook support is welded to the cargo box bottom plate, making it difficult to maintain and replace; 2) the single tail hook locking range is small and the locking force is insufficient, resulting in poor closure of the tail door; 3) the locking rod adopts a single screw direction, which is prone to loosening when adjusting the length, affecting the locking reliability.

[0003] In related technologies, the tail hook is opened and closed through a locking rod assembly, but the above problems still exist, especially lacking a detachable installation structure and a double-hook cooperative locking design. Therefore, there is an urgent need for a mechanical locking device that can be quickly repaired, has high locking force, and is stable in adjustment. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a locking device and a dump truck, which has better locking force and stability for the cargo box.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] The first aspect of the present application provides a locking device, which comprises:

[0007] A connecting rod seat fixed to the tail of the auxiliary frame;

[0008] A support fixedly installed on the cargo box bottom plate;

[0009] A tail hook assembly comprising at least two tail hooks and a connecting shaft, the two tail hooks being rotatably connected to the support through the connecting shaft;

[0010] A connecting rod assembly having two ends rotatably connected to the connecting rod seat and the tail hook assembly, respectively.

[0011] In one possible implementation, the connecting rod assembly comprises a connecting rod, a first connecting block and a second connecting block, the first connecting block and the second connecting block being threadedly fixed to the two ends of the connecting rod, respectively, and the first connecting block and the second connecting block being rotatably connected to the connecting rod seat and the tail hook assembly, respectively.

[0012] In one possible implementation, the first connecting block has a first opening with opposite first and second side walls, the first and second side walls being provided with a first shaft hole and a second shaft hole, respectively, and the first and second shaft holes being coaxially arranged;

[0013] The connecting rod base is provided with a first through hole, and the first connecting block is rotatably connected with the connecting rod base through a first rotating shaft penetrating the first shaft hole, the first through hole and the second shaft hole.

[0014] In a possible implementation, the second connecting block has a second opening with opposite third and fourth side walls, and the third and fourth side walls are respectively provided with a third shaft hole and a fourth shaft hole coaxially arranged; the tail hook is provided with a second through hole, and the second connecting block is rotatably connected with the tail hook assembly through a second rotating shaft penetrating the third shaft hole, the second through hole and the fourth shaft hole.

[0015] In a possible implementation, the support is provided with a rotating hole, and the connecting shaft penetrates the rotating hole, so that the tail hook assembly can rotate relative to the support.

[0016] In a possible implementation, the support is provided with a threaded hole, and the support is detachably connected with the box bottom plate through a bolt penetrating the threaded hole and the box bottom plate.

[0017] In a possible implementation, the support is two, and the two supports are fixedly installed on the box bottom plate and connected to the two ends of the connecting shaft, respectively, and the connecting shaft can rotate relative to the support.

[0018] In a possible implementation, the tail hook has a hook part, and the surface of the hook part is provided with an anti-skid pattern, or the hook part is provided with a wear-resistant sleeve.

[0019] In a possible implementation, the connecting rod base is at least two, and the two connecting rod bases are fixedly spaced on the rear part of the auxiliary frame, and the connecting rod assembly and the tail hook assembly are at least two.

[0020] The locking device provided in the first aspect of the present application has at least the following beneficial effects:

[0021] By using bolts to detachably install the support to the cargo box floor, replacing the traditional welding method, maintenance and replacement time is significantly shortened, and costs are reduced. The tail hook assembly has at least two tail hooks and a connecting shaft, forming a symmetrical double-hook locking structure. This expands the locking range and effectively distributes the locking force to both sides of the tailgate, avoiding the problem of insecure closure caused by stress concentration at a single point. The linkage assembly achieves mechanical linkage through the rotational connection at both ends, using the cargo box's own lifting / lowering motion to drive the tail hook to open and close automatically, eliminating the need for an external power source. This improves system reliability and significantly reduces energy consumption. In addition, the linkage seat is fixed to the rear of the subframe. Combined with the multi-degree-of-freedom connection design of the linkage assembly, it can adapt to the dynamic deformation of the cargo box, preventing the locking mechanism from failing due to mechanical vibration or impact, thus improving locking stability. This device, through its modular structure, adapts to cargo boxes with different rear overhang sizes, reducing customization costs and effectively extending the overall lifespan, making it particularly suitable for high-frequency dump truck scenarios.

[0022] A second aspect of this application provides a dump truck, including the locking device provided by any of the above-mentioned technical solutions.

[0023] The dump truck provided in the second aspect of this application has all the beneficial effects of the locking device provided in the first aspect of this application, which will not be repeated here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the locking device provided in the embodiment of this application, showing the locking state between the locking device and the cargo box;

[0026] Figure 2 A schematic diagram of the locking device and the cargo box in an open state, provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the locking device provided in the embodiments of this application;

[0028] Figure 4 for Figure 3 Top view;

[0029] Figure 5 A schematic diagram of the linkage assembly of the locking device provided in the embodiments of this application;

[0030] Figure 6 for Figure 5 A structural diagram from another perspective;

[0031] Figure 7 The structure diagram of the tail hook assembly of the locking device provided by the embodiment of the present application is shown.

[0032] Explanation of reference signs:

[0033] 100, connecting rod seat; 200, support; 300, tail hook assembly; 310, tail hook; 320, connecting shaft; 400, connecting rod assembly; 410, connecting rod; 420, first connecting block; 421, first opening; 4211, first side wall; 4212, second side wall; 422, first nut; 430, second connecting block; 431, second opening; 4311, third side wall; 4312, fourth side wall; 432, second nut; 500, subframe; 600, cargo box bottom plate.

[0034] The specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] As described in the background, at present, the single tail hook locking device fixed by welding is commonly used in the dump truck, which has the following technical defects: 1) the tail hook support is welded to the cargo box bottom plate, which is difficult to maintain and replace; 2) the single tail hook locking range is small, and the locking force is insufficient, which leads to the poor closure of the tail door; 3) the locking rod adopts a single screw direction, which is easy to loosen when adjusting the length, affecting the locking reliability. In the related art, the tail hook is opened and closed by the locking rod assembly, but the above-mentioned problems still exist, especially lacking a detachable mounting structure and a double-hook cooperative locking design. Therefore, there is an urgent need for a mechanical locking device which can be quickly maintained, has high locking force and stable adjustment.

[0036] To solve the above technical problems, the embodiment of the present application provides a locking device, which adopts a bolt to detachably mount a support on a cargo box bottom plate, replaces a traditional welding fixing mode, greatly shortens the maintenance and replacement time, and reduces the cost; the tail hook assembly has at least two tail hooks and a linkage shaft, forms a symmetrical double-hook locking structure, expands the locking range, effectively disperses the locking force to both sides of the tail door, and avoids the problem of poor closure caused by single-point stress concentration; the connecting rod assembly is rotationally connected at both ends to realize mechanical linkage, automatically opens and closes the tail hook by using the self-motion of the cargo box lifting / descending, does not need an external power source, improves the system reliability, and significantly reduces the energy consumption. In addition, the connecting rod seat is fixed at the tail of the auxiliary frame, and in combination with the multi-degree-of-freedom connection design of the connecting rod assembly, can adapt to the dynamic deformation of the cargo box, prevents the locking mechanism from failing due to mechanical vibration or impact, and improves the locking stability. The device is adapted to cargo boxes of different rear suspension sizes through a modular structure, reduces the customized modification cost, effectively prolongs the overall service life, and is especially suitable for the self-unloading vehicle scene with high frequency operation.

[0037] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0038] Reference Figures 1 to 7 In a first aspect, the locking device provided by the embodiments of the present application comprises: a connecting rod seat 100 fixed at the tail of an auxiliary frame 500; a support 200 fixedly mounted on a cargo box bottom plate; a tail hook 310 assembly 300 comprising at least two tail hooks 310 and a linkage shaft 320, the two tail hooks 310 being rotationally connected to the support 200 through the linkage shaft 320; and a connecting rod assembly 400 rotationally connected at both ends to the connecting rod seat 100 and the tail hook 310 assembly 300.

[0039] In some embodiments, the connecting rod assembly 400 comprises a connecting rod piece 410, a first connecting block 420 and a second connecting block 430, the first connecting block 420 and the second connecting block 430 being threadedly fixed at both ends of the connecting rod piece 410, and the first connecting block 420 and the second connecting block 430 being rotationally connected to the connecting rod seat 100 and the tail hook 310 assembly 300, respectively. The connecting block is designed separately from the connecting rod piece 410, facilitating assembly and maintenance.

[0040] The connecting rod seat 100 can be welded or bolted to the rear part of the auxiliary frame 500 as a fixed fulcrum of the connecting rod assembly 400, and the support 200 can be detachably installed on the rear beam of the truck bed floor by bolts (for example, M16 high-strength bolts), and the bolt holes are uniformly distributed to enhance the connection stability. The tail hook 310 assembly 300 includes two symmetrical tail hooks 310 and a connecting shaft 320, and the tail hook 310 is rotatably connected to the support 200 through the connecting shaft 320, thereby forming a double-hook cooperative locking structure. The connecting rod assembly 400 is connected to the connecting rod seat 100 and the tail hook 310 assembly 300 at both ends through a rotating shaft, and the connecting rod assembly 400 includes a connecting rod piece 410 (3-3), a first connecting block 420 and a second connecting block 430 (right-handed U-shaped fork 3-5). The first connecting block 420 and the second connecting block 430 are both U-shaped fork-shaped pieces, and the connecting rod piece 410 is provided with external threads in opposite directions at both ends to adjust and self-lock the length of the connecting rod assembly 400 by cooperating with the first nut 422 and the second nut 432, respectively. The design of left and right threaded screws makes the two ends of the connecting rod length adjustable synchronously, avoiding unilateral loosening.

[0041] In some embodiments, the first connecting block 420 has a first opening 421 with opposite first and second side walls 4211 and 4212, and the first and second side walls 4211 and 4212 are respectively provided with a first and a second shaft hole coaxially arranged. The connecting rod seat 100 is provided with a first through hole, and the first connecting block 420 is rotatably connected to the connecting rod seat 100 by a first rotating shaft penetrating the first, first through hole and second shaft holes. The first rotating shaft can be a pin shaft or a bolt.

[0042] In this way, a multi-degree-of-freedom articulated structure is realized, the rotating shaft connection allows the connecting rod assembly 400 to swing in multiple directions with the truck movement, adapts to dynamic deformation, and the coaxial shaft hole design ensures uniform stress during rotation and reduces wear.

[0043] In some embodiments, the second connecting block 430 has a second opening 431 with opposite third and fourth side walls 4311 and 4312, and the third and fourth side walls 4311 and 4312 are respectively provided with a third and a fourth shaft hole coaxially arranged. The tail hook 310 is provided with a second through hole, and the second connecting block 430 is rotatably connected to the tail hook 310 assembly 300 by a second rotating shaft penetrating the third, second through hole and fourth shaft holes, to ensure that the tail hook 310 opens and closes synchronously with the connecting rod action.

[0044] In this way, the rotating shaft connects the tail hook 310 assembly 300 and the connecting rod assembly 400, ensuring precise synchronization of the locking action, the double shaft hole design prevents the tail hook 310 from deviating under stress, and improves the locking reliability.

[0045] In some embodiments, the support 200 is provided with a rotating hole, and the rotating hole is penetrated by the connecting shaft 320, so that the tail hook 310 assembly 300 can rotate relative to the support 200. Further, bearings or bushings (such as copper-based self-lubricating bushings) can be installed at both ends of the connecting shaft 320 to reduce rotating friction.

[0046] In some embodiments, the support 200 is provided with a threaded hole, and the support 200 is detachably connected to the cargo box bottom plate through a bolt penetrating the threaded hole and the cargo box bottom plate.

[0047] In this way, the bolt connection replaces welding, and when maintenance is required, cutting or welding equipment is not required, and the effect of quickly replacing the component structure can be achieved. The bolt hole design allows the installation position of the support 200 to be adjusted to adapt to the needs of different vehicle models.

[0048] In some embodiments, the support 200 is two, both of which are fixedly installed on the cargo box bottom plate and connected to both ends of the connecting shaft 320, and the connecting shaft 320 can rotate relative to the support 200.

[0049] In this way, the double supports 200 disperse the stress and avoid single-point stress concentration, thereby enhancing the structural rigidity. Moreover, the connecting shaft 320 penetrates the double supports 200, thereby ensuring that the two tail hooks 310 operate consistently.

[0050] In some embodiments, the tail hook 310 has a clamping hook portion, and the surface of the clamping hook portion is provided with anti-slip patterns, such as diamond patterns, with a depth of 1-2 mm, or the clamping hook portion is provided with a wear-resistant sleeve made of polyurethane material to enhance the friction and wear resistance.

[0051] In some embodiments, the connecting rod seat 100 is at least two, and the two connecting rod seats 100 are fixedly spaced on the tail of the auxiliary frame 500. The connecting rod assembly 400 and the tail hook 310 assembly 300 are also at least two, for example, the connecting rod seat 100 is two, and the two connecting rod seats 100 are fixedly spaced on the tail of the auxiliary frame 500. The connecting rod assembly 400 and the tail hook 310 assembly 300 are also two. In this way, the double support 200 and the multi-connecting rod arrangement are achieved. Two supports 200 are symmetrically installed at both ends of the cargo box tail beam, the connecting shaft 320 penetrates the double supports 200, and the structural stability is enhanced. The two connecting rod seats 100 are fixedly spaced on the tail of the auxiliary frame 500, corresponding to the two sets of connecting rod assemblies 400 and tail hook 310 assemblies 300, and multi-point locking is achieved to adapt to the needs of an ultra-long cargo box.

[0052] It can be understood that the working principle of the locking device provided by the embodiments of the present application includes:

[0053] When the cargo box is lifted: the tail of the cargo box rotates clockwise around the rotating shaft, the distance between the support 200 and the connecting rod seat 100 decreases, the connecting rod assembly 400 pushes the tail hook 310 to rotate clockwise around the connecting shaft 320, and the tail hook 310 is separated from the tail door to achieve opening.Figure 2

[0054] When the container falls: the tail of the container rotates counterclockwise, the distance between the support 200 and the connecting rod seat 100 increases, the connecting rod assembly 400 pulls the tail hook 310 to rotate counterclockwise, the double hook clamps the tail door, and the locking force is uniformly distributed Figure 1

[0055] Length adjustment: loosen the locking nuts (first nut 422 and second nut 432), rotate the connecting rod, the first connecting block 420 and the second connecting block 430 are synchronized to approach or move away, and the locking nuts are locked after adjustment to prevent loosening.

[0056] In a second aspect, the embodiments of the present application provide a self-unloading vehicle comprising the locking device provided by any of the embodiments of the first aspect.

[0057] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0058] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0059] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] ​​In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly contacting the first and second features, or indirectly contacting the first and second features through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0061] The embodiments or implementations in the present specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0062] It should be noted that the embodiments referred to in the specification as "one embodiment", "an embodiment", "example embodiment", "some embodiments" and the like can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure or characteristic in connection with other embodiments described explicitly or implicitly.

[0063] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A locking device, characterized in that The application relates to a locking device for a truck. The locking device comprises a connecting rod seat fixed to the rear part of a subframe, a support fixedly installed on a truck bed floor, a tail hook assembly comprising at least two tail hooks and a connecting shaft, and a connecting rod assembly with two ends rotatably connected to the connecting rod seat and the tail hook assembly. The connecting rod assembly comprises a connecting rod, a first connecting block and a second connecting block, the first connecting block and the second connecting block are threadedly fixed to the two ends of the connecting rod, and the first connecting block and the second connecting block are rotatably connected to the connecting rod seat and the tail hook assembly. The first connecting block has a first opening with opposite first and second side walls, the first and second side walls are respectively provided with a first shaft hole and a second shaft hole, and the first and second shaft holes are coaxially arranged. The connecting rod seat is provided with a first through hole, and the first connecting block is rotatably connected to the connecting rod seat through a first rotating shaft penetrating the first shaft hole, the first through hole and the second shaft hole.

2. The locking device of claim 1, wherein The second connecting block has a second opening with opposite third and fourth side walls, the third and fourth side walls are respectively provided with a third shaft hole and a fourth shaft hole, and the third and fourth shaft holes are coaxially arranged; the tail hook is provided with a second through hole, and the second connecting block is rotatably connected to the tail hook assembly through a second rotating shaft penetrating the third shaft hole, the second through hole and the fourth shaft hole.

3. The locking device of claim 2, wherein The support is provided with a rotating hole, the rotating hole is penetrated by the connecting shaft, so that the tail hook assembly can rotate relative to the support. The support is provided with a threaded hole, and the support is detachably connected to the truck bed floor through a bolt penetrating the threaded hole and the truck bed floor.

4. The locking device of claim 2, wherein The support is provided with a threaded hole, and the support is detachably connected to the truck bed floor through a bolt penetrating the threaded hole and the truck bed floor.

5. A locking device according to any one of claims 1-4, characterized in that The tail hook has a hook part, and the surface of the hook part is provided with anti-skid lines, or the hook part is provided with a wear-resistant sleeve.

6. A locking device according to any one of claims 1-4, characterized in that The connecting rod seat is at least two, the two connecting rod seats are fixedly arranged at the rear part of the subframe, and the connecting rod assembly and the tail hook assembly are at least two.

7. A locking device according to any one of claims 1-4, characterized in that The application further relates to a locking device comprising any one of the locking devices as claimed in claims 1-9.

8. A locking device according to any one of claims 1-4, characterized in that ​ 9. A locking device according to any one of claims 1-4, characterized in that ​ 10. A dump truck characterized by ​

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