CN114274722B - A mine car suspension balance structure - Google Patents

Abstract

The invention discloses a mine car suspension balancing structure, which comprises two shock absorbers arranged on an auxiliary frame of a non-independent suspension, wherein the two shock absorbers are arranged at two ends of the auxiliary frame, a cavity is arranged in a rod of a piston rod of an oil cylinder of each shock absorber, rod inner cavities of the piston rods of the two shock absorbers are connected through a connecting pipe, and a damping structure for reducing oil in the rod inner cavities of the piston rods of one shock absorber from flowing into the rod inner cavities of the piston rods of the other shock absorber is arranged on the connecting pipe. The invention connects the inner cavities of the piston rod and the rod of the two shock absorbers, but when the mine car is impacted by a rugged road, part of oil can be transmitted to the shock absorbers which are not impacted by the road on the other side through the connecting pipe, so that the shock absorbers can mutually compensate each other, buffer the impact force of the road, and avoid the problem that the left wheel and the right wheel of the non-independent suspension are mutually influenced greatly due to the impact of the road on one side.

Description

A mine car suspension balance structure

Technical field

The invention relates to a mine car suspension balance structure.

Background technique

Mining trucks (hereinafter referred to as mining trucks) are non-highway vehicles that are mainly used to transport ore and rock and soil in large-scale open-pit mines. It is an efficient transportation equipment commonly used in open-pit mines at home and abroad. The rear suspension is one of the important assemblies on the mine car. As the domestic market's demand for coal, iron ore and other resources increases, hydraulic mining trucks with large transport capacity and high work efficiency have gradually become the main force in open-pit mine transportation. Due to the harsh working environment of the mine car, when the road surface is uneven, the mine car will vibrate up and down. If the suspension system of the mine car cannot adapt to this change, the mine car body will jump up and down and it will not be able to drive stably. The main function of the suspension system is to transmit all forces and moments between the wheels and the body, slow down impacts and attenuate vibrations, ensure occupant comfort and reduce dynamic loads. Traditional suspension systems are mainly mechanical suspensions, namely passive suspension and semi-active suspension. Mine car suspension is also similar to car suspension, including springs, shock absorbers, stabilizer bar assemblies, subframes and connecting rods (or swing arms), etc. The function of the springs is to provide support for the vehicle body to ensure that the vehicle passes Softness, the function of the shock absorber is to quickly absorb the vibration transmitted by the road. In order to consider the cost, most mining cars still use non-independent suspension. However, how to avoid the interaction between the left and right wheels caused by the impact of the road on one side is relatively large. Big problems cannot be solved well.

Contents of the invention

The object of the present invention is to overcome the defects existing in the prior art and provide a mine car suspension balance structure that connects the inner cavities of the piston rods of two shock absorbers. However, when the mine car is impacted due to rough road surfaces, it can Part of the oil is transmitted through the connecting pipe to the shock absorber on the other side that has not been impacted by the road surface, which can compensate for each other, buffer the impact force of the road, and avoid the interaction between the left and right wheels caused by the impact of the road surface on one side of the non-independent suspension. Issues with greater impact.

In order to achieve the above object, the technical solution of the present invention is to design a mine car suspension balance structure, which includes a shock absorber arranged on the sub-frame of the non-independent suspension. The shock absorber is provided with two and located on the sub-car. At both ends of the frame, there is a cavity in the piston rod of the oil cylinder of each shock absorber. The cavities in the piston rods of the two shock absorbers are connected through a connecting pipe. The connecting pipe is provided with a The oil in the cavity of the shock absorber piston rod flows into the damping structure of the cavity of the shock absorber piston rod on the other side.

A further technical solution is that the damping structure is a throttle valve arranged on the connecting pipe.

Another technical solution is that the damping structure includes a damping hole provided at the lower part of the oil cylinder block of the shock absorber, the opening of the connecting pipe is located at the damping hole, and the diameter of the connecting pipe is larger than the aperture of the damping hole. When oil flows, a pressure difference occurs between the front and rear due to the damping effect of the small holes on the liquid flow. The damping hole will cause a pressure drop. Since the cylinder speed is determined, the damping hole is used instead of the throttle valve to throttle and reduce costs.

Another technical solution is that the connecting pipe is a Y-shaped pipe with three pipe openings, and the connecting pipe is provided with two, a large pipe opening of a Y-shaped connecting pipe and a shock absorber on the left or right side. The two small nozzles of the Y-shaped connecting pipe are connected to the oil cylinder of the right or left shock absorber; the other large nozzle of the Y-shaped connecting pipe is connected to the right or left shock absorber. The oil cylinders are connected, and the two small nozzles of the Y-shaped connecting pipe are connected to the oil cylinders of the shock absorbers on the left or right side; the damping structure includes a one-way valve arranged on a small diameter pipeline of the Y-shaped connecting pipe. After this arrangement, when the wheel on one side is impacted by a rough road, the oil in the cavity of the piston rod of the shock absorber on this side of the wheel is diverted to the shock absorber on the other side. Due to the setting of the Y-shaped tube This makes the oil that can be diverted to the shock absorber on the other side limited, so too much oil will not be diverted to the other side to avoid diverting too much oil and causing a decrease in the damping effect of the shock absorber; diverting only a part can compensate for the other side. The side shock absorber buffers the road impact force and avoids the problem of large mutual influence between the left and right wheels caused by the non-independent suspension due to road impact on one side.

A further technical solution is to provide a piston rod in sliding cooperation with the liquid seal of the oil cylinder. The outer wall of the piston rod and the inner wall of the cylinder form a damping chamber. The second damping hole and the second one-way valve communicate with the chamber. When the vehicle is stimulated by an uneven road surface, the piston and piston rod assembly will reciprocate relative to the cylinder. If the piston and piston rod shrink relative to the cylinder barrel, the oil in the cavity of the piston rod will be compressed and flow in two directions. Movement: First, the gas inside the accumulator is further compressed and enters the accumulator (the lower part of the cylinder is equipped with a nozzle connected to the accumulator through a pipeline); second, it enters the damping chamber through the damping hole and one-way valve; Because the one-way valve is open, the piston and piston rod assembly receive a small damping force when they move relative to the cylinder, which is equivalent to the spring action in a traditional suspension; when the piston rod moves in the opposite direction, the oil in the damping chamber is compressed, The oil in the damping chamber is forced to flow into the cavity in the piston rod through the damping hole (the one-way valve is in a closed state at this time). At the same time, because the increased volume of the cavity in the piston rod is greater than the reduced volume of the damping chamber, the result will be Part of the oil in the accumulator enters the cavity of the piston rod under the action of gas pressure. In this case, because the one-way valve is closed, the piston and piston rod assembly experience a large damping force when they move relative to the cylinder, which is equivalent to Shock absorber function in conventional suspension.

A further technical solution is that a stepped hole for placing the second one-way valve is provided on both side walls of the piston rod, and the large-sized hole of the stepped hole is arranged close to the damping chamber; the second damping hole is located at the upper part of the cylinder; Both the one-way valve and the second one-way valve include a steel ball that is larger than the small-sized hole of the stepped hole, and the ball diameter of the steel ball is adapted to the large-sized hole. You can also learn from the air suspension or active suspension used in automobiles, and install inflating equipment on the basis of the present invention, or because some mine cars are equipped with air compressors, the air compressor can be used as the inflating equipment of the cylinder. (In addition to oil, the cylinder is also filled with inert gas). According to different working conditions in different mining areas, different amounts of gas are selected to adjust the height of the mine car to improve the comfort of the suspension.

The advantages and beneficial effects of the present invention are that the inner cavities of the piston rods of the two shock absorbers are connected, but when the mine car is impacted due to the rough road, part of the oil can be transmitted to the other side through the connecting pipe without being impacted by the road. The shock absorbers can compensate for each other and buffer the impact force of the road, avoiding the problem of large mutual influence between the left and right wheels caused by the impact of the road surface on one side of the non-independent suspension.

When a wheel on one side is impacted by a rough road, the oil in the cavity of the piston rod of the shock absorber on this side of the wheel is diverted to the shock absorber on the other side. Due to the setting of the Y-shaped tube, the oil is diverted away. The oil in the shock absorber on the other side is limited, so too much oil will not be diverted to the other side to avoid diverting too much oil and causing a decrease in the damping effect of the shock absorber. Only diverting a part of the oil can compensate for the shock absorption on the other side. It buffers the road impact force and avoids the problem of large mutual influence between the left and right wheels caused by the impact of the road surface on one side of the non-independent suspension.

Description of the drawings

Figure 1 is a schematic diagram of a suspension including a mine car suspension balance structure according to Embodiment 1 of the present invention;

Figure 2 is a schematic diagram of the shock absorber in Figure 1;

Figure 3 is a schematic structural diagram of Figure 2;

Figure 4 is a schematic diagram of two shock absorbers in Embodiment 2 of the present invention;

Figure 5 is a schematic diagram of another embodiment.

In the picture: 1. Shock absorber; 2. Piston rod; 3. Cavity in the rod; 4. Connecting pipe; 5. Damping hole; 6. One-way valve; 7. Damping chamber; 8. Second damping hole; 9 , the second one-way valve; 10. Accumulator.

Detailed ways

Specific implementations of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention, but cannot be used to limit the scope of the present invention.

Example 1:

As shown in Figures 1 to 3 (for convenience of illustration, Figure 2 does not show the connecting pipe and Figure 3 does not show the accumulator), the present invention is a mine car suspension balance structure, including a non-independent There are two shock absorbers 1 on the subframe of the suspension. There are two shock absorbers 1 located at both ends of the subframe. There is a cavity in the piston rod 2 of the oil cylinder of each shock absorber 1. The inner rod cavity 3 of the piston rod 2 of the two shock absorbers 1 is connected through a connecting pipe 4. The connecting pipe 4 is provided with a device to reduce the flow of oil into the inner rod cavity 3 of the piston rod 2 of one shock absorber 1 and the other. The damping structure of the cavity 3 in the piston rod 2 of the side shock absorber 1. The damping structure includes a damping hole 5 provided at the lower part of the cylinder body of the shock absorber 1 . The opening of the connecting pipe 4 is located at the damping hole 5 and the diameter of the connecting pipe 4 is larger than the aperture of the damping hole 5 . A piston rod 2 is provided in sliding cooperation with the liquid seal of the cylinder body. The outer wall of the piston rod 2 and the inner wall of the cylinder form a damping chamber 7. There is a rod wall on the piston rod 2 for connecting the inner cavity 3 of the piston rod 2 with the damping The second damping hole 8 and the second one-way valve 9 communicate with the chamber 7 . The two side walls of the piston rod 2 are provided with a stepped hole for placing the second one-way valve 9. The large-sized hole of the stepped hole is located close to the damping chamber 7; the second damping hole 8 is located at the upper part of the cylinder; Both the one-way valve and the second one-way valve 9 include steel balls with smaller holes than the stepped holes, and the ball diameter of the steel balls is adapted to the large holes. As shown in Figure 1, since the piston rod is articulated with the upper horizontal connecting rod and cooperates with the shock absorber, the connecting rod can always be kept horizontal in the event of road impact, ensuring the stability of the mine car body. The lower part of the cylinder is provided with a pipe port connected to the accumulator 10 through a pipeline.

Example 2:

The difference from Embodiment 1 is that, as shown in Figure 4, the connecting pipe 4 is a Y-shaped pipe with three nozzles. There are two connecting pipes 4, one Y-shaped connecting pipe 4 and one large nozzle. Connected to the oil cylinder of the shock absorber 1 on the left or right side, the two small nozzles of the Y-shaped connecting pipe 4 are connected to the oil cylinder of the shock absorber 1 on the right or left side; one of the other Y-shaped connecting pipe 4 The large nozzle is connected to the oil cylinder of the shock absorber 1 on the right or left side, and the two small nozzles of the Y-shaped connecting pipe 4 are connected to the oil cylinder of the shock absorber 1 on the left or right side; the damping structure includes a Y-shaped One-way valve 6 on a small diameter pipeline connecting pipe 4. (You can also connect the pipe through only one Y-shaped pipe as shown in Figure 5. In this case, two one-way valves must be installed on the cylinder wall corresponding to the two small-sized pipes of the Y-shaped pipe. Two corresponding stepped holes are provided on the body wall and the two stepped holes are set in opposite directions}, so that only a part of the cylinder oil of the shock absorber on one side is transferred to the cylinder oil on the other side, which ensures that the impact The shock absorption effect on one side also avoids the problem of large mutual influence between the left and right wheels caused by non-independent suspension due to road impact on one side)

The above are only preferred embodiments of the present invention. It should be pointed out that those of ordinary skill in the art can also make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (1)

1. The mine car suspension balancing structure is characterized by comprising two shock absorbers which are arranged on an auxiliary frame of a non-independent suspension, wherein the two shock absorbers are arranged at two ends of the auxiliary frame, a cavity is arranged in a rod of a piston rod of an oil cylinder of each shock absorber, rod inner cavities of the piston rods of the two shock absorbers are connected through a connecting pipe, and a damping structure for reducing oil in the rod inner cavities of the piston rods of one shock absorber from flowing into the rod inner cavities of the piston rods of the other shock absorbers is arranged on the connecting pipe;

the damping structure comprises a damping hole arranged at the lower part of the cylinder body of the oil cylinder of the shock absorber, the orifice of the connecting pipe is positioned at the damping hole, the diameter of the connecting pipe is larger than the aperture of the damping hole, and when oil flows, a front-back pressure difference is generated due to the damping action of the small hole on liquid flow;

the piston rod is in liquid seal sliding fit with the cylinder body of the oil cylinder, a damping chamber is formed by the outer rod wall of the piston rod and the inner wall of the cylinder body, and a second damping hole and a second one-way valve for communicating the inner cavity of the piston rod with the damping chamber are arranged on the rod wall of the piston rod;

the two side walls of the piston rod are provided with stepped holes for placing the second one-way valve, and large-size holes of the stepped holes are arranged close to the damping chamber; the second damping hole is positioned at the upper part of the cylinder body;

the mine car suspension balancing structure is also matched with an inflation device for inflating inert gas into the cylinder body of the oil cylinder, and the oil liquid and the inert gas are arranged in the cylinder body of the oil cylinder;

the connecting pipe is a Y-shaped pipe with three pipe orifices;

the two connecting pipes are arranged, one large pipe orifice of one Y-shaped connecting pipe is connected with the oil cylinder of the shock absorber on the left side, and the two small pipe orifices of the Y-shaped connecting pipe are connected with the bottom of the oil cylinder of the shock absorber on the right side; one large pipe orifice of the other Y-shaped connecting pipe is connected with the oil cylinder of the right shock absorber, and two small pipe orifices of the Y-shaped connecting pipe are connected with the bottom of the oil cylinder of the left shock absorber; the damping structure comprises a one-way valve arranged on a small-pipe-diameter pipeline of the Y-shaped connecting pipe;

or the connecting pipe is provided with one large pipe orifice of the Y-shaped connecting pipe which is connected with the oil cylinder of the shock absorber on the left side, and two small pipe orifices of the Y-shaped connecting pipe are connected with the bottom of the oil cylinder of the shock absorber on the right side; two one-way valves are arranged on the cylinder wall corresponding to the two small-size tubes of the Y-shaped tube, two stepped holes are correspondingly arranged on the cylinder wall, and two steps Kong Fanxiang are arranged;

the check valve and the second check valve both comprise steel balls larger than the small-size holes of the stepped holes, and the spherical diameters of the steel balls are matched with the large-size holes.