A large box lifting and lowering limiting mechanism for new energy underground mine truck

Abstract

The utility model discloses a kind of big box lifting and descending limit mechanism for new energy underground mine card, including carriage and frame, the carriage front end transversely is provided with multiple first wedge, frame front end is provided with second wedge in the position corresponding with first wedge, the opposite surface of first wedge and second wedge is set as the inclined plane of kiss; The carriage middle part transversely is provided with multiple first hinged seat, frame middle part is provided with second hinged seat in the position corresponding with first hinged seat, first hinged seat is hingedly connected with first connecting rod, second hinged seat is hingedly connected with second connecting rod, and first connecting rod and second connecting rod end are hingedly connected. Compared with prior art, the utility model not only sets lifting limit but also sets descending limit, ensures that lifting cylinder is always used in normal range, avoids cylinder pulling caused by pressurizing jacking damage carriage and overtopping jacking.

Description

Technical Field

[0001] This utility model relates to the field of underground mining truck equipment technology, specifically to a large box lifting and lowering limit mechanism for new energy underground mining trucks. Background Technology

[0002] During ore unloading operations, the lifting cylinder drives the truck bed to tilt to a set angle, and the ore inside then slides down under its own weight. To ensure the stability of the unloading process and the safety of the equipment, precise limit control of the truck bed lifting is required. In existing technology, the patent with authorization announcement number CN208745854 U uses a PLC controller combined with sensors to drive a solenoid valve, achieving the limit function by cutting off the oil circuit. However, this solution has a significant drawback: when the PLC control system or the sensor fails, the lifting cylinder may over-lift due to continuous oil supply, causing the truck to lose balance and overturn, posing a major safety hazard. This indicates that the current lifting limit structure still needs optimization and improvement.

[0003] It is worth noting that, in addition to the lifting limit, the lowering limit is equally critical. When fully loaded, the mining truck bed has enormous inertia. If a lowering limit device is not installed, the bed is prone to jamming with the frame during ore loading due to impact loads, leading to pressure build-up in the lifting cylinders, which seriously affects the service life of the equipment and operational safety. Utility Model Content

[0004] The purpose of this utility model is to provide a large box lifting and lowering limit mechanism for underground mining trucks in new energy, so as to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lifting and lowering limit mechanism for a large box used in underground mining trucks for new energy includes a car body and a frame. Multiple first wedge blocks are laterally arranged at the front end of the car body, and second wedge blocks are arranged at the front end of the frame corresponding to the positions of the first wedge blocks. The opposing surfaces of the first and second wedge blocks are configured as matching inclined surfaces. Multiple first hinge seats are laterally arranged in the middle of the car body, and second hinge seats are arranged at the middle of the frame corresponding to the positions of the first hinge seats. A first connecting rod is hinged to the first hinge seat, and a second connecting rod is hinged to the second hinge seat. The ends of the first and second connecting rods are hinged together.

[0007] Compared with the prior art, this utility model not only has a lifting limit but also a lowering limit, ensuring that the lifting cylinder is always used within the normal range, avoiding damage to the vehicle body due to pressure buildup during lifting and cylinder dislodgement due to over-lifting; moreover, both the lifting limit and the lowering limit are mechanical structures, so there is no problem of control failure, and the structure is simple and practical. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] In the diagram, 1-carriage, 2-frame, 3-first wedge block, 4-second wedge block, 5-first hinge seat, 6-second hinge seat, 7-first connecting rod, 8-second connecting rod. Detailed Implementation

[0010] The present invention will be further explained below with reference to the accompanying drawings.

[0011] like Figure 1 As shown, a lifting and lowering limiting mechanism for a large-box underground mining truck for new energy includes a carriage 1 and a frame 2. Multiple first wedge blocks 3 are laterally arranged at the front end of the carriage 1. Second wedge blocks 4 are arranged at the front end of the frame 2 corresponding to the positions of the first wedge blocks 3. The opposing surfaces of the first wedge blocks 3 and the second wedge blocks 4 are designed to meet at an angle. When the carriage 1 descends to its designated position, the angled surfaces of the first wedge blocks 3 and the second wedge blocks 4 meet to form a lowering limiting mechanism, preventing the carriage 1 from continuing to descend and jamming against the frame 2, thus avoiding cylinder blockage during lifting. Furthermore, to prevent the first wedge blocks 3 and the second wedge blocks 4 from locking up, the middle of the first wedge block 3 can be planed inwards to deepen its depth, and the sides of the second wedge block 4 can be thinned to create an irregular curved surface at the mating surfaces.

[0012] Multiple first articulated seats 5 are transversely arranged in the middle of the carriage 1. A second articulated seat 6 is located in the middle of the frame 2, corresponding to the positions of the first articulated seats 5. A first connecting rod 7 is hinged to the first articulated seat 5, and a second connecting rod 8 is hinged to the second articulated seat 6. The ends of the first connecting rod 7 and the second connecting rod 8 are hinged together. When the carriage 1 is lifted upwards, the first connecting rod 7 and the second connecting rod 8 rotate around the hinge point and gradually straighten until they are fully lifted and locked, preventing the lifting cylinder from over-lifting due to continuous oil supply, which could cause the vehicle to lose balance and overturn. Furthermore, to limit the lifting limit of the carriage according to different operating environments, multiple articulated holes are provided along the rod body of the first connecting rod 7 or the second connecting rod 8. Selecting different articulated holes for connection allows for different lifting height limits.

Claims

1. A large box lifting and lowering limiting mechanism for a new energy underground mine truck, characterized in that, The vehicle includes a carriage (1) and a frame (2). The front end of the carriage (1) is provided with a plurality of first wedge blocks (3) and the front end of the frame (2) is provided with a second wedge block (4) corresponding to the position of the first wedge block (3). The opposite surfaces of the first wedge block (3) and the second wedge block (4) are set as matching inclined surfaces. The middle part of the carriage (1) is provided with a plurality of first hinge seats (5) and the middle part of the frame (2) is provided with a second hinge seat (6) corresponding to the position of the first hinge seat (5). A first connecting rod (7) is hinged on the first hinge seat (5) and a second connecting rod (8) is hinged on the second hinge seat (6). The ends of the first connecting rod (7) and the second connecting rod (8) are hinged together.

2. The large box lifting and lowering limiting mechanism for new energy underground mine cars according to claim 1, characterized in that, The first link (7) or the second link (8) has multiple hinge holes along its body.

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