Hinged mechanism with limiting device and hinged dump truck

Abstract

The utility model discloses a kind of hinged mechanism and articulated dump truck with limiting device, belong to articulated dump truck technical field.The hinged mechanism includes front car, articulated body, rear car, two-stage steering limiter and hoisting limiter, wherein two-stage steering limiter is composed of rubber limiting block and metal limiting seat.Rubber limiting block in two-stage steering limiter provides limiting and buffering shock absorption when normal operation, when worn to flush with metal limiting seat, limiting by metal limiting seat to avoid steering angle exceeds theoretical limit;Hoisting limiter is fixed front and rear car and articulated body to prevent twisting when hoisting, can also be used as cargo box lifting maintenance limiter, realize generalization.The present scheme solves the existing steering limiting easy to be lost due to rubber wear and tear and hoisting part easy to be damaged Problem, can guarantee steering safety, remind to replace rubber part, improve driving feeling and reduce cost, applicable to articulated dump truck.

Description

Technical Field

[0001] This utility model relates to the field of articulated vehicle technology, specifically to an articulated mechanism with a limiting device and an articulated dump truck. Background Technology

[0002] Articulated dump trucks (hereinafter referred to as articulated trucks) are a new type of dump truck developed to address the shortcomings of rigid dump trucks, such as large turning radius and poor adaptability to slippery and muddy road surfaces. They consist of two frames: a front frame and a rear frame. The front frame houses the powertrain, cab, fuel tank, hydraulic tank, radiator, and other components, while the rear frame primarily supports the cargo box. The front and rear frames are connected by an articulated joint, enabling steering and tilting; the articulated joint, front frame, and rear frame form a single articulated mechanism. Currently, the industry standard for articulated trucks is typically 45 degrees to the left and right, and 30 degrees to the left and right for both front and rear tilting.

[0003] As a flexible mechanism, the articulated mechanism presents two problems that need to be addressed during the operation and transportation of articulated vehicles.

[0004] Firstly, the articulated vehicle's operating steering angle is 45 degrees. Considering manufacturing and assembly errors of components, the theoretical design value of the maximum steering angle will be 1 to 2 degrees larger than the allowable operating value. The specific value varies depending on the OEM. This invention takes the theoretical design value of 47 degrees as an example. If the steering angle exceeds 47 degrees, it will cause interference wear of the drive shaft cross shaft, and malfunctions such as collisions between the platform and the rear frame, and between the platform and the cargo box.

[0005] Secondly, articulated vehicles are usually transported by flatbed trucks during transit, so they need to be hoisted onto the flatbed trucks. During the hoisting process, the front and rear frames will twist, which can lead to breakage and damage to the articulated parts in severe cases.

[0006] In existing technology, CN202123280114.0, "An Articulated Dump Truck Connecting Frame and Articulated Dump Truck," mentions the use of rubber buffer seats to limit the vehicle's steering angle and mitigate the impact during stopping. However, this rubber limiting device does not consider the wear-prone nature of rubber. In actual use, due to wear of the rubber limiting and shock-absorbing pads, the limiting function will fail, causing the steering angle to exceed the theoretical design limit angle, leading to problems such as cross-axis interference wear of the drive shaft and interference collisions between the rear and front vehicles. Furthermore, no technology related to lifting and limiting has been found to date. Utility Model Content

[0007] (a) Technical issues This utility model aims to at least partially solve one of the technical problems in the related art.

[0008] Therefore, the purpose of this utility model is to propose an articulated mechanism with a limiting device and an articulated dump truck, which addresses the problems of easy failure of the steering limit and easy torsion damage of the front and rear frames during hoisting in the prior art.

[0009] (II) Technical Content To achieve the above objectives, this utility model proposes a two-stage steering limiter comprising two sides of the articulation body between the front and rear vehicles, specifically: The two-stage steering limiter consists of a limit seat and a limit block, wherein: The limiting seat is made of wear-resistant metal and is installed at the rear end of the front vehicle and located next to the hinge body. The limiting block is made of rubber and is detachably mounted on the rear side of the limiting seat; The limiting seat has a rearward protrusion on its rear side, making the limiting seat as a whole L-shaped structure. The length of the protrusion extending rearward is less than the initial thickness of the limiting block.

[0010] As a wear part, the rubber limit block provides a limit during normal operation of the articulated vehicle and plays a role in buffering and shock absorption of the steering collision between the articulated body and the front frame. When the rubber limit block wears down to the level of the metal limit seat, the metal seat limits the steering angle to ensure that the steering angle does not exceed the theoretical design limit angle. At this time, the vehicle user needs to replace the rubber limit block.

[0011] During unloading, a lifting limiter can be connected between the front and rear vehicles to ensure that the front and rear vehicles do not twist relative to each other when the articulated vehicle is lifted. In addition, considering the universal design, the lifting limiter is interchangeable with the cargo box lifting and maintenance limiter. That is, during lifting, the lifting limiter is used to support the rear vehicle and the cargo box.

[0012] In addition, the hinge mechanism with limiting device proposed above according to this utility model may also have the following additional technical features: Preferred technical solution 1: A daily placement station is also provided on the rear vehicle, and the hoisting limiter can be stored in the daily placement station when not in use.

[0013] Preferred technical solution 2: Lifting limiting seats are formed at the rear end of the front vehicle and the front end of the rear vehicle near the hinge body, respectively referred to as the front vehicle lifting limiting seat and the rear vehicle lifting limiting seat; When the lifting limiter is transferred and lifted by the articulated vehicle, the front end is fixed to the lifting limit seat of the front vehicle by a limit pin, and the rear end is fixed to the lifting limit seat of the rear vehicle by a limit pin. Furthermore, the lifting limiters are symmetrically distributed on the left and right sides of the articulated body to ensure that the front vehicle, rear vehicle, and articulated body are completely fixed during the lifting process, preventing the relative twisting of the front and rear vehicles from causing damage to the parts.

[0014] Preferred technical solution 3: The rear end of the vehicle is hinged to the rear end of the cargo box, and lifting limit seats are also provided on both the rear vehicle and the cargo box, which are respectively called the rear vehicle maintenance lifting limit seat and the cargo box maintenance lifting limit seat; When the lifting limiter is used as a cargo box lifting and maintenance limiter, its front end is connected to the rear vehicle maintenance lifting limiter seat on the rear side of the vehicle via a limit pin, and its rear end is connected to the cargo box maintenance lifting limiter seat on the cargo box via a limit pin, to prevent the cargo box from falling abnormally due to a malfunction of the lifting cylinder and causing a safety accident; when not in use, the lifting limiter is fixed at the designated daily placement position on the rear vehicle.

[0015] Preferred technical solution four: The articulation body is fixed to the front end of the rear vehicle, and the front end of the articulation body is rotatably connected to the steering pin shaft installed at the rear end of the front vehicle; Articulation body limiting seats are formed by protrusions at the positions of the two sets of two-stage steering limiters on the left and right sides of the articulation body. When the articulated vehicle turns, the articulation body limiting seats contact the two-stage steering limiters.

[0016] (III) Technical Effects The above structure gives this solution the following advantages: 1. The two-stage steering limiter, consisting of a rubber limit block and a metal limit seat, can ensure the elastic buffering effect when the articulated vehicle is turning normally, reduce the vibration of the whole vehicle, and completely ensure that the steering angle will not exceed the theoretical design angle. 2. The metal limit seat ensures that the steering angle does not exceed the theoretical limit, and at the same time serves as a gauge for the wear limit of the rubber limit block, reminding the user to replace the rubber limit block. 3. By adjusting the stiffness of the rubber limit block, the magnitude of the collision vibration between the front and rear vehicles during steering can be adjusted, thus improving the driving experience; 4. The lifting limiter is also used for safety limit of cargo box lifting and maintenance, realizing the universality of the whole vehicle and reducing the cost of the whole vehicle. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is a partial enlargement of the scheme. Figure 1 ; Figure 3 This is a partial enlargement of the scheme. Figure 2 ; Figure 4 This diagram illustrates the usage status of the hoisting limit switch used as a cargo box lifting and maintenance limit switch in this solution.

[0018] Among them, 1-front vehicle, 2-steering pin, 3-articulation body, 4-rear vehicle, 5-steering cylinder, 6-two-stage steering limiter, 7-lifting limiter, 8-limit block, 9-limit seat, 10-articulation body limit seat, 11-front vehicle lifting limit seat, 12-limit pin, 13-rear vehicle lifting limit seat, 14-cargo box; M is the normal placement position of the lifting limiter, and N is the position of the lifting limiter used as a cargo box lifting and maintenance limiter. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0020] The hinge mechanism with a limiting device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0021] Please see Figures 1-4 The articulated mechanism with limiting device in this embodiment of the utility model consists of a front vehicle 1, a steering pin 2, an articulated body 3, a rear vehicle 4, a steering cylinder 5, a two-stage steering limiter 6, and a hoisting limiter 7. The steering limiter 6 is composed of a rubber limiting block 8 and a metal limiting seat 9.

[0022] The front end of the articulated body 3, which is fixed to the front side of the rear vehicle 4, is rotatably connected to the steering pin 2 installed at the rear of the front vehicle 1. The front and rear ends of the steering cylinder 5 are respectively hinged between the front vehicle 1 and the rear vehicle 4 (the steering cylinder 5 is symmetrically distributed on the left and right sides of the articulated vehicle). The extension and retraction of the steering cylinder 5 are used to control the steering of the front vehicle 1 and the rear vehicle 4.

[0023] Taking the left turn of an articulated vehicle as an example, the working principle of the two-stage steering limiter 6 is as follows: The two-stage steering limiter 6 consists of a rubber limit block 8 and a metal limit seat 9. The limit seat 9 is fixed to the rear end of the front vehicle 1, while the limit block 8 is bolted to the limit seat 9. When the articulated vehicle turns left, the driver operates the steering wheel, controlling the steering cylinder 5 to shorten (the right steering cylinder 5 to extend). The steering cylinder 5 applies force to the articulated body 3 and the front vehicle 1. The articulated body 3 drives the rear vehicle 4 to rotate around the steering pin 2, thus achieving vehicle steering. When turning at the maximum steering angle, the articulated body limit seat 10 contacts the limit block 8, achieving maximum steering angle limitation. The limit block 8 is an elastic body, which is compressed when it collides with the articulated body limit seat 10, playing a buffering and shock-absorbing role. Its compression varies depending on the designed rubber hardness. For the new limit block 8, the maximum compression a of the limit block 8 caused by the maximum force applied by the steering cylinder 5 is less than the height difference Δh between the rubber limit block 8 and the rear protrusion of the limit seat 9 when no force is applied. As the limit block 8 wears, the compression a gradually approaches the height difference Δh. When the two are equal, the limit block 8 has reached its service life and needs to be replaced. If the limit block 8 is not replaced in time or is damaged due to other faults, the hinge limit seat 10 will directly contact the metal limit seat 9 during steering, achieving rigid limiting and avoiding damage to other parts of the vehicle due to interference.

[0024] The lifting limiter 7 is fixed at position L in the diagram during the lifting and transport of the articulated vehicle. Its front end is fixed to the lifting limit seat 11 of the front vehicle via a limit pin 12, and its rear end is fixed to the lifting limit seat 13 of the rear vehicle via another limit pin 12. At this time, a lifting limiter 7 is also installed at the same position on the right side of the articulated vehicle. The two lifting limiters 7 work together to ensure that the front vehicle 1, the rear vehicle 4, and the articulated body 3 are completely fixed during the lifting process, preventing the relative twisting of the front vehicle 1 and the rear vehicle 4 from damaging the articulated body 3 and other parts. Considering universality, the lifting limiter 7 can also be used as a safety limiter when repairing internal parts of the rear vehicle after the cargo box 14 is lifted. It is installed at position N in the diagram, with its front end connected to the rear vehicle 4 and its rear end connected to the cargo box 14, to prevent the cargo box 14 from falling abnormally due to a malfunction of the cargo box lifting cylinder, thus preventing safety accidents. When the lifting limiter 7 is not in use, it is fixed at position M in the diagram of the rear vehicle 4.

[0025] During use, this solution requires daily maintenance of each component according to the established maintenance plan to ensure its working condition.

[0026] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hinge mechanism with a limiting device, comprising a front vehicle (1) and a rear vehicle (4), wherein the hinge body (3) at the front end of the rear vehicle (4) is rotatably connected to the steering pin (2) at the rear side of the front vehicle (1), and a steering cylinder (5) is also connected between the front vehicle (1) and the rear vehicle (4), characterized in that: Also includes The two-stage steering limiter (6) includes a limit seat (9) installed on the side of the rear end of the front vehicle (1) near the articulation body (3) and a limit block (8) assembled on the rear side of the limit seat (9). The limit block (8) is an elastic body, while the limit seat (9) is metal. The two work together to limit the steering angle of the articulation mechanism. When the limit block (8) is worn to be flush with the rear end of the limit seat (9), the limit seat (9) limits the steering angle to avoid exceeding the theoretical design limit angle. The lifting limiter (7) is used to fix the front vehicle (1), the rear vehicle (4) and the articulated body (3) during the transfer and lifting of the articulated vehicle, so as to prevent the three from twisting relative to each other.

2. The hinge mechanism with limiting device according to claim 1, characterized in that: The two-stage steering limiters (6) are symmetrically distributed on the left and right sides of the hinge body (3) by bolts.

3. The hinge mechanism with limiting device according to claim 2, characterized in that: The limiting seat (9) has a rearward protrusion on its rear side, and the length of the rearward protrusion is less than the initial thickness of the limiting block (8). Furthermore, in the initial state of the limiting block (8), when the steering cylinder (5) applies the maximum force, the maximum compression of the limiting block (8) is less than the height difference between the limiting block (8) and the protrusion.

4. The hinge mechanism with limiting device according to claim 1, characterized in that: When the hoisting limiter (7) is used to fix the front vehicle (1), the rear vehicle (4) and the articulated body (3), the front end is fixed to the front vehicle hoisting limiter seat (10) on the front vehicle (1) by a limit pin (12), and the rear end is fixed to the rear vehicle hoisting limiter seat (13) on the rear vehicle (4) by another limit pin (12). Furthermore, another hoisting limiter (7) is provided at a symmetrical position on the right side of the articulated vehicle.

5. The hinge mechanism with limiting device according to claim 4, characterized in that: The lifting limiter (7) can also be used as a cargo box lifting and maintenance limiter. At this time, its front end is connected to the rear vehicle (4), and its rear end is connected to the cargo box (14) above the rear vehicle (4).

6. The hinge mechanism with limiting device according to claim 1, characterized in that: When not in use, the hoisting limiter (7) is fixed in place at the usual work position L for storage.

7. An articulated dump truck, characterized in that, Includes the hinge mechanism with limiting device as described in any one of claims 1-6.

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