A safety support device for a dump truck bed

Abstract

The present application relates to a kind of self-unloading vehicle carriage safety support device, the support device includes cylinder, four push-pull rods, the piston is slidably connected in the cylinder of support device, and the first end cap is provided on the upper end port of cylinder, piston is slidably connected in the cylinder, the lower end of push-pull rod is fixedly connected with the upper end of piston, screw rod is provided in the cylinder, rotating drum is provided in piston, rotating drum is screwedly connected with screw rod, locking disc is provided in rotating drum, the locking and unlocking of locking disc are realized by the cooperation of electromagnet and tension spring in the present application, it is convenient to lock piston at specified site of cylinder;And locking rod is adjusted synchronously according to the flow of hydraulic oil, it is easy to operate;In addition, locking rod and locking disc for locking are all arranged in the interior of piston, do not affect the damage of chrome layer of piston and push-pull rod, and service life is long.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering dump vehicles, and particularly relates to a self-dumping vehicle carriage safety supporting device. BACKGROUND

[0002] At present, when self-dumping vehicles transport ores, coal, sand and other materials, the self-dumping vehicles can significantly improve work efficiency due to high automation degree of unloading, and are widely applied. When the self-dumping vehicles unload materials, a support device drives a car hopper to be turned over to unload the materials. In this process, a hydraulic cylinder bears a large load. In order to improve safety during the turning over process of the self-dumping vehicle carriage, a hydraulic lock is usually installed on the hydraulic cylinder to cut off the flow of hydraulic oil, so that the piston rod in the hydraulic cylinder is kept in a fixed position for a long time. However, if the sealing element of the hydraulic cylinder leaks, or the pipeline between the hydraulic lock and the hydraulic cylinder leaks, the piston rod in the hydraulic cylinder will still move, thereby destroying the stability during the turning over process of the carriage, causing the self-dumping vehicle to tilt, and causing a safety accident.

[0003] A mechanical self-locking hydraulic cylinder disclosed in Chinese Patent No. 201210095720.1 uses a disc spring to tightly press a wedge-shaped piston by elastic force, so that the wedge-shaped piston applies a pushing force to a wedge-shaped clamping block, thereby making the wedge-shaped clamping block tightly hold the cylinder barrel to achieve fixing effect. On the one hand, the elastic force of the disc spring is limited, and the tightness of the wedge-shaped clamping block to hold the cylinder barrel is limited, so that the locking effect of the support device on the self-dumping vehicle with large load is limited. On the other hand, the locking force of the self-locking device acts on the cylinder barrel of the hydraulic cylinder, which does not cause damage to the chrome plating layer of the piston rod, but long-term extrusion of the hydraulic cylinder can easily cause damage to the structure of the hydraulic cylinder. When a large load is borne for a long time, the hydraulic cylinder is easily extruded and deformed, so that the cylinder body and the side surface of the piston cannot be completely fitted, causing hydraulic oil leakage and load drop.

[0004] In view of the deficiencies in the prior art, further improvement is needed. SUMMARY

[0005] Therefore, the present application aims to provide a self-dumping vehicle carriage safety supporting device to solve the above problems.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is: a self-unloading vehicle carriage safety supporting device, the supporting device comprises a cylinder body and four push-pull rods, the supporting device is arranged between the vehicle chassis and the carriage of the self-unloading vehicle, the lower edge of the rear end of the carriage is rotationally connected with the vehicle chassis of the self-unloading vehicle through a positioning pivot, the bottom end of the cylinder body is hingedly connected with the vehicle chassis of the self-unloading vehicle, the position close to the lower end of the cylinder body and the position close to the upper end are both provided with a communication port, the communication port is communicated with an oil storage tank through a pipeline, the oil storage tank is provided with hydraulic oil, a piston is slidably connected in the cylinder body, a first end cover is arranged at the upper end of the cylinder body, a piston is slidably connected in the cylinder body, the upper end of the piston is fixedly connected with the lower end of the push-pull rod, the lower end of the push-pull rod is fixedly connected with the upper side of the piston, the upper end of the push-pull rod passes through the first end cover and is fixedly connected with a mounting seat, and the mounting seat is hingedly connected with the lower side of the middle part of the carriage.

[0007] The lower end of the piston is provided with a second end cover, the internal space of the piston is sealed by the second end cover, a lead screw is arranged in the cylinder body, the lower end of the lead screw is fixedly connected with the lower side of the middle part of the cylinder body, the upper end of the lead screw is fixedly connected with the first end cover, a rotating drum is arranged in the piston, the rotating drum is screwedly connected with the lead screw, the rotating drum is self-rotated when the rotating drum moves up and down, the upper end of the rotating drum is rotationally connected with the upper side of the middle part of the piston, the lower end of the rotating drum is rotationally connected with the second end cover, a lock disc is arranged in the middle part of the rotating drum, a plurality of lock grooves are uniformly distributed on the upper side of the lock disc, a driving wheel is fixedly arranged on the rotating drum and located below the partition plate, a plurality of generators are fixedly arranged on the second end cover in a ring shape, a driven wheel is fixedly arranged on the rotating shaft of the generator, the driven wheel is in contact with the driving wheel, an electromagnet is arranged in the piston, the electromagnet is fixedly connected with the upper side of the piston, an adjusting ring is arranged below the electromagnet, a plurality of lock rods are uniformly distributed on the lower side of the adjusting ring, the lock rods pass through the partition plate and are inserted into the lock grooves on the upper side of the lock disc, a tension spring is sleeved on the lock rods, the upper end of the tension spring is fixedly connected with the adjusting ring, and the lower end of the tension spring is fixedly connected with the partition plate.

[0008] Preferably, the electromagnet is internally provided with a storage battery, the storage battery is connected with the generator through a wire, and the communication port is provided with a flow switch, the flow switch is triggered when the hydraulic oil flows through the communication port, and the flow switch is connected with the electromagnet through a wire.

[0009] Preferably, the position of the first end cover through which the push-pull rod passes is sealed by an oil seal.

[0010] Preferably, the diameter of the driving wheel is much larger than the diameter of the driven wheel, so that the generator has enough rotating speed to generate electricity when the driving wheel rotates.

[0011] Preferably, the generator is a 37RS3525 type low-rotating-speed micro direct-current generator, so that the generator can generate electricity in both forward and reverse directions.

[0012] The beneficial effects of the present application are: the hydraulic oil triggers the flow switch when passing through the communication port, the electromagnet is opened, under the magnetic force of the electromagnet, the adjusting ring is attracted to slide, the tension spring is stretched, the lock rod is separated from the lock groove on the lock disc, the drum is unlocked, then under the action of the hydraulic oil, the piston is pushed to slide, the extension and retraction of the push-pull rod are adjusted, and the turnover of the carriage is realized; when the angle of the carriage is adjusted and the hydraulic oil stops flowing, the flow switch closes the electromagnet, the position of the push-pull rod is fixed, and at the same time, under the action of the tension spring, the lock rod is inserted into the lock groove of the lock disc to limit the rotation of the drum, and the piston is locked at the specified position of the cylinder body; and the lock rod is adjusted synchronously according to the flow of the hydraulic oil, so that the operation is convenient; in addition, the lock rod and the lock disc for locking are arranged in the piston, which does not affect the damage of the chrome plating layer of the piston and the push-pull rod, and the service life is long. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the main structure diagram of the present application;

[0014] Figure 2 is the structure diagram of the support device when it is extended;

[0015] Figure 3 is the structure diagram of the support device when it is shortened;

[0016] Figure 4 is the structure diagram of the support device when it is self-locked;

[0017] Reference numerals in the drawing: 1 is a self-unloading vehicle; 2 is a carriage; 3 is a support device; 4 is a cylinder body; 401 is a communication port; 5 is a push-pull rod; 6 is a piston; 601 is a partition; 7 is a first end cover; 8 is a mounting seat; 9 is a second end cover; 10 is a drum; 11 is a lock disc; 1101 is a lock groove; 12 is a driving wheel; 13 is a generator; 14 is a driven wheel; 15 is an electromagnet; 16 is an adjusting ring; 17 is a lock rod; 18 is a tension spring; and 19 is a lead screw. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in combination with the drawings and specific embodiments:

[0019] As Figures 1-4As shown, a self-unloading vehicle carriage safety support device is shown, the support device 3 includes a cylinder body 4, four push-pull rods 5, the support device 3 is arranged between the vehicle chassis and the carriage 2 of the self-unloading vehicle 1, the lower edge of the rear end of the carriage 2 is rotatably connected with the vehicle chassis of the self-unloading vehicle 1 through a positioning pivot, the bottom end of the cylinder body 4 of the support device 3 is hingedly connected with the vehicle chassis of the self-unloading vehicle 1, the cylinder body 4 is provided with a communication port 401 near the lower end part and near the upper end part, the communication port 401 is communicated with an oil storage tank through a conduit, a hydraulic oil is arranged in the oil storage tank, the hydraulic oil is in and out of the cylinder body 4 through the communication port 401, a piston 6 is slidably connected with the cylinder body 4, a first end cover 7 is arranged at the upper end port of the cylinder body 4, the inside of the cylinder body 4 forms a sealed space by the first end cover 7, the piston 6 is slidably connected in the cylinder body 4, the upper end of the piston 6 is fixedly connected with the lower end of the push-pull rod 5, the lower end of the push-pull rod 5 is fixedly connected with the upper side of the piston 6, the push-pull rod 5 passes through the first end cover 7, an installation seat 8 is fixedly arranged at the upper end of the push-pull rod 5, and the installation seat 8 is hingedly connected with the lower side of the middle part of the carriage 2.

[0020] In the embodiment, a partition plate 601 is arranged at the middle part of the piston 6, a second end cover 9 is arranged at the lower end port of the piston 6, the inside space of the piston 6 is sealed by the second end cover 9, a lead screw 19 is arranged in the cylinder body 4, the lower end of the lead screw 19 is fixedly connected with the lower side of the middle part of the cylinder body 4, the upper end of the lead screw 19 is fixedly connected with the first end cover 7, a rotating cylinder 10 is arranged in the piston 6, the rotating cylinder 10 is screwedly connected with the lead screw 19, the rotating cylinder 10 is self-rotated when the rotating cylinder 10 moves up and down, the upper end of the rotating cylinder 10 is rotatably connected with the upper side of the middle part of the piston 6, and the lower end of the rotating cylinder 10 is rotatably connected with the second end cover 9, a lock disc 11 is arranged at the middle part of the rotating cylinder 10, a plurality of lock grooves 1101 are uniformly distributed on the upper side of the lock disc 11, a driving wheel 12 is fixedly arranged on the rotating cylinder 10, and the driving wheel 12 is located below the partition plate 601, a plurality of generators 13 are fixedly arranged on the second end cover 9 in a ring shape, a driven wheel 14 is fixedly arranged on the rotating shaft of the generator 14, the driven wheel 14 is in contact with the driving wheel 12, the rotating shaft of the generator 13 is driven to rotate by the friction force between the driving wheel 12 and the driven wheel 14, an electromagnet 15 is arranged in the piston 6, the electromagnet 15 is fixedly connected with the upper side of the piston 6, an adjusting ring 16 is arranged below the electromagnet 15, a plurality of lock rods 17 are uniformly distributed on the lower side of the adjusting ring 16, the lock rods 17 pass through the partition plate 601, the lower ends of the lock rods 17 are inserted into the lock grooves 1101 corresponding to the positions on the upper side of the lock disc 11, a tension spring 18 is sleeved on the lock rod 17, the upper end of the tension spring 18 is fixedly connected with the adjusting ring 16, and the lower end of the tension spring 18 is fixedly connected with the partition plate 601.

[0021] In the embodiment, a storage battery is arranged in the electromagnet 15, and the storage battery is connected with the generator 13 through a wire, a flow switch is arranged at the communication port 401, the flow switch is triggered when the hydraulic oil flows through the communication port 401, and the flow switch is connected with the electromagnet 15 through a wire.

[0022] In this embodiment, the first end cover 7 part through which the push-pull rod 5 passes is sealed by an oil seal.

[0023] In this embodiment, the diameter of the driving wheel 12 is much larger than that of the driven wheel 14, so that when the driving wheel 12 rotates, the generator 13 has enough rotating speed to generate electricity.

[0024] In this embodiment, the generator 13 is a low-rotating-speed micro DC generator of model 37RS3525, so that the generator 13 can generate electricity in both forward and reverse directions.

[0025] The working principle of the present application is as follows: when the dump truck needs to reverse the carriage 2 to unload goods, the hydraulic oil in the oil storage tank is led to the space in the cylinder 4 below the piston 6, and the hydraulic oil in the space in the cylinder 4 above the piston 6 is recovered to the oil storage tank, and when the hydraulic oil passes through the communication port 401, the flow switch is triggered, the electromagnet 15 is opened, under the magnetic force of the electromagnet 15, the adjusting ring 16 is attracted to slide upward, the tension spring 18 is stretched, the lock rod 17 is separated from the lock groove 1101 on the lock disc 11, then under the action of the hydraulic oil, the piston 6 is pushed to slide upward, and under the cooperation of the screw rod 19 and the rotating drum 10, the rotating drum 10 and the piston 6 are synchronously moved upward while rotating, on the one hand, the rotating shaft of the generator 13 is driven to rotate by the cooperation of the driving wheel 12 and the driven wheel 14 to generate electricity, and the electromagnet 15 is charged; similarly, after the goods are unloaded, the carriage 2 needs to be lowered, the hydraulic oil in the oil storage tank is led to the space in the cylinder 4 above the piston 6, and the hydraulic oil in the space in the cylinder 4 below the piston 6 is recovered to the oil storage tank, and when the hydraulic oil passes through the communication port 401, the flow switch is triggered, the electromagnet 15 is opened, under the magnetic force of the electromagnet 15, the adjusting ring 16 is attracted to slide upward, the tension spring 18 is stretched, the lock rod 17 is separated from the lock groove 1101 on the lock disc 11, then under the action of the hydraulic oil, the piston 6 is pushed to slide downward, and under the cooperation of the screw rod 19 and the rotating drum 10, the rotating drum 10 and the piston 6 are synchronously moved downward while rotating, on the one hand, the rotating shaft of the generator 13 is driven to rotate by the cooperation of the driving wheel 12 and the driven wheel 14 to generate electricity, and the electromagnet 15 is charged; when the angle of the carriage 2 is adjusted and the hydraulic oil stops flowing, the flow switch closes the electromagnet 15, the position of the push-pull rod 5 is fixed, and under the action of the tension of the tension spring 18, the lock rod 17 is inserted into the lock groove 1101 of the lock disc 11 to limit the rotation of the rotating drum 10, and since the rotating drum 10 is limited to rotate under the cooperation of the rotating drum 10 and the screw rod 19, the piston 6 and the rotating drum 10 are locked, the piston 6 is locked at a specified position of the cylinder 4; the lock rod 17 and the lock disc 11 for locking are arranged inside the piston 6, which does not affect the damage of the chrome layer of the piston 6 and the push-pull rod 5, and the service life is long.

[0026] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A safety support device for a dump truck bed, said support device comprising a cylinder, four push-pull rods, characterized in that, The supporting device is arranged between the vehicle chassis and the vehicle compartment of the dump truck, the lower edge of the rear end of the vehicle compartment is rotationally connected with the vehicle chassis through a positioning pivot, the bottom end of the cylinder of the supporting device is hingedly connected with the vehicle chassis, the cylinder is provided with a communication port near the lower end and near the upper end, the communication port is communicated with an oil storage tank through a pipeline, the oil storage tank is provided with hydraulic oil, a piston is slidably connected in the cylinder, a first end cover is arranged at the upper end of the cylinder, a piston is slidably connected in the cylinder, the upper end of the piston is fixedly connected with the lower end of a push-pull rod, the lower end of the push-pull rod is fixedly connected with the upper side of the piston, the push-pull rod passes through the first end cover, and a mounting seat is fixedly arranged at the upper end of the push-pull rod, the mounting seat is hingedly connected with the lower side of the vehicle compartment; A partition plate is arranged in the middle of the piston, a second end cover is arranged at the lower end of the piston, the internal space of the piston is sealed by the second end cover, a lead screw is arranged in the cylinder, the lower end of the lead screw is fixedly connected with the lower side of the cylinder, the upper end of the lead screw is fixedly connected with the first end cover, a rotating cylinder is arranged in the piston, the rotating cylinder is screwedly connected with the lead screw, the rotating cylinder is self-rotated when the rotating cylinder moves up and down, the upper end of the rotating cylinder is rotationally connected with the upper side of the piston, the lower end of the rotating cylinder is rotationally connected with the second end cover, a lock disc is arranged in the middle of the rotating cylinder, lock grooves are uniformly distributed on the upper side of the lock disc, a plurality of generators are fixedly arranged on the second end cover in a ring shape, a driven wheel is fixedly arranged on the rotating shaft of the generator, the driven wheel is in contact with the driving wheel, an electromagnet is arranged in the piston, the electromagnet is fixedly connected with the upper side of the piston, an adjusting ring is arranged below the electromagnet, lock rods are uniformly distributed on the lower side of the adjusting ring, the lock rods pass through the partition plate, the lower ends of the lock rods are inserted into the lock grooves on the upper side of the lock disc, a tension spring is sleeved on the lock rods, the upper end of the tension spring is fixedly connected with the adjusting ring, and the lower end of the tension spring is fixedly connected with the partition plate.

2. A safety support device for a dump body as defined in claim 1, wherein, A storage battery is arranged in the electromagnet, the storage battery is connected with the generators through wires, and the communication port is provided with a flow switch, the flow switch is triggered when the hydraulic oil flows through the communication port, and the flow switch is connected with the electromagnet through wires.

3. A safety support device for a dump body as defined in claim 1, wherein, The first end cover through which the push-pull rod passes is sealed by an oil seal.

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