CN209581072U - Middle and rear axle suspension system of mine dump truck - Google Patents

Abstract

A middle and rear axle suspension system of a mining dump truck, comprising a middle axle suspension oil cylinder, a large cavity connector, a large cavity accumulator, a rear axle suspension oil cylinder, a ring cavity connector and a ring cavity accumulator; the middle bridge suspension oil cylinder and One end of the rear axle suspension oil cylinder is connected to the axle, and the other end is connected to the frame; the large chamber of the middle axle suspension oil cylinder and the large chamber of the rear axle suspension oil cylinder are respectively connected to the large chamber accumulator through a large chamber connecting piece, and the ring of the middle axle suspension oil cylinder The cavity and the ring cavity of the rear axle suspension oil cylinder are respectively connected to the ring cavity accumulator through a ring cavity connecting piece. The advantages of this kind of suspension system are: under the same inflated volume, it avoids the phenomenon of excessive useless travel; the large cavity and ring cavity of the suspension cylinder have anti-pressure air chambers to buffer, avoid rigid collisions, and improve reliability; improve the comfort of driving members sex.

Description

Middle and rear axle suspension system of mine dump truck

technical field

The utility model patent relates to a rear axle suspension system of a mining dump truck, which is suitable for 6×4, 8×4 and other rear double-axle mining dump trucks, and belongs to the technical field of mining vehicles.

Background technique

Mining dump trucks have the characteristics of large carrying capacity, short transportation distance and high transportation efficiency. Because it often operates in mining areas or engineering construction sites, the road conditions are poor and the overload is serious. Most of the 6×4 mining dump trucks currently operating in my country’s mining areas use leaf springs for the suspension of the middle and rear axles. Due to the limitation of the bearing capacity of the leaf springs, the tonnage is generally low, about 60 tons, and the weight is heavy and the comfort is poor. The failure rate is high. A small number of medium and rear axle suspensions use balanced oil-air suspension, which can carry a large tonnage, but most of them use a single-chamber accumulator structure, resulting in frequent rigid impacts in chambers that are not connected to accumulators or inflated, greatly reducing system reliability.

Utility model content

The utility model provides a rear axle suspension system of a mining dump truck, which not only avoids the disadvantages of the above-mentioned structural forms, but also retains the advantages of balanced oil-air suspension.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:

A mid-rear axle suspension system of a mining dump truck, characterized in that it includes a mid-axle suspension cylinder, a large cavity connector, a large cavity accumulator, a rear axle suspension cylinder, an annular cavity connector, and an annular cavity accumulator;

One end of the middle axle suspension oil cylinder and the rear axle suspension oil cylinder are connected to the axle, and the other end is connected to the frame; the large chamber of the middle axle suspension oil cylinder and the large chamber of the rear axle suspension oil cylinder are respectively connected to the large chamber accumulator through a large chamber connecting piece, The ring cavity of the middle axle suspension oil cylinder and the ring cavity of the rear axle suspension oil cylinder are respectively connected to the ring cavity accumulator through a ring cavity connecting piece.

There is a first oil port and a second oil port on the cylinder head of the mid-axle suspension oil cylinder and/or the rear axle suspension oil cylinder; the cylinder body has a piston rod, a letter pipe, a large cavity and an annular cavity for accommodating oil in and out; the first oil port is in the The inside of the large cavity is connected with the letter pipe, and the first oil port is connected with the connecting piece of the large cavity on the outside; the ring cavity is connected with the second oil port through the damping hole and the inner cavity of the piston rod; the second oil port is connected with the ring on the outside. The chamber connectors communicate.

The middle axle suspension oil cylinder has the same structure as the rear axle suspension oil cylinder.

Both the large cavity accumulator and the ring cavity accumulator adopt high and low pressure dual accumulators.

When the middle axle suspension oil cylinder is compressed, the oil fluid is buffered by the large cavity accumulator, so that the rear axle suspension oil cylinder moves to extend.

When the rear axle suspension oil cylinder is compressed, the oil fluid is buffered by the large-cavity accumulator to make the middle axle suspension oil cylinder move out.

One end of the middle and rear axle suspension oil cylinder is connected to the axle, and the other end is connected to the frame. The large cavity of the middle and rear axle suspension cylinders is connected to each other through an accumulator, and the ring cavity is connected to the ring cavity through an accumulator. The accumulator adopts the form of high and low pressure dual accumulators. Compared with the ordinary middle and rear axle oil-air suspension, this kind of balanced suspension has the following advantages: 1. Under the same inflated volume, the buffer curve of the oil cylinder is more linear, and the phenomenon of excessive useless travel is avoided. 2. The large cavity and the ring cavity of the suspension cylinder are buffered by back pressure air chambers to avoid rigid collision and improve reliability. 3. The comfort of driving members is improved.

Description of drawings

Fig. 1 is the utility model assembly schematic diagram;

Fig. 2 is the internal structure diagram of the middle bridge suspension oil cylinder of the utility model;

In the figure, mid-axle suspension cylinder 1, large chamber connector 2, large chamber accumulator 3, rear axle suspension cylinder 4, ring chamber connector 5, ring chamber accumulator 6, cylinder head 7, first oil port 8 , The second oil port 9, piston rod 10, guide ring 11, cylinder 12, letter tube 13, damping hole 14, piston 15, cylinder base 16.

Detailed ways

The utility model will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 and 2, the rear axle suspension system of a mine dump truck includes a middle axle suspension cylinder 1, a large cavity connector 2, a large cavity accumulator 3, a rear axle suspension cylinder 4, an annular cavity connector 5 and Annular accumulator 6. One end of the middle axle suspension oil cylinder 1 and the rear axle suspension oil cylinder 4 are connected with the vehicle axle, and the other end is connected with the vehicle frame. The large chamber of the mid-axle suspension oil cylinder 1 and the 4 large chambers of the rear axle suspension oil cylinder are connected to each other through the large-chamber connector 2 and the large-chamber accumulator 3 respectively, and the ring chamber of the middle bridge suspension oil cylinder 1 and the 4 ring chambers of the rear axle suspension oil cylinder respectively pass through the ring chamber The connecting piece 5 is interconnected with the annular accumulator 6 . Both the large cavity accumulator 3 and the annular cavity accumulator 6 are in the form of high and low pressure double accumulators, which can avoid excessive useless travel.

The mid-axle suspension oil cylinder 1 and the rear axle suspension oil cylinder 4 have the same structure, and the cylinder head 7 has a first oil port 8 and a second oil port 9; the cylinder body 12 has a piston rod 10 and a letter pipe 13 for accommodating oil in and out. Large cavity and ring cavity. The first oil port 8 communicates with the faith pipe 13 inside the large cavity, and the first oil port 8 communicates with the connecting piece 2 of the large cavity externally. The annular cavity communicates with the second oil port 9 through the damping hole 14 and the inner cavity of the piston rod 10 . The second oil port 9 communicates externally with the annular space connection 5 .

Description of the application scenario of the utility model: Combining Figure 1 and Figure 2, the mid-bridge suspension oil cylinder 1 is compressed, and the oil in its large cavity flows out through the first oil port 8 through the signal pipe 13 under the action of the compression force, and passes through the large cavity connecting piece 2 After buffering, the large chamber accumulator 3 flows into the first oil port of the rear axle suspension oil cylinder 4, and the oil enters the large cavity of the rear axle suspension oil cylinder through the letter pipe of the rear axle suspension oil cylinder, and the oil pressure acts on the piston of the rear axle suspension oil cylinder 4 , so that the piston rod of the rear axle suspension oil cylinder 4 protrudes outward, that is, the rear axle suspension oil cylinder 4 moves out; at the same time, the oil in the ring cavity of the rear axle suspension oil cylinder 4 passes through its damping hole, piston The inner cavity of the rod flows into the second oil port of the rear axle suspension oil cylinder, flows out through the second oil port, and flows into the second oil port 9 of the middle axle suspension oil cylinder 1 after being buffered by the ring cavity connector 5 and the ring cavity accumulator 6 In the ring chamber of the mid-bridge suspension oil cylinder 1.

Therefore, when the middle axle suspension oil cylinder 1 is compressed, the rear axle suspension oil cylinder 4 is stretched out after being buffered by the large chamber accumulator 3 . The ring cavity accumulator 6 plays a buffering role when the rear axle suspension cylinder stretches out.

In the same way, when the rear axle suspension oil cylinder 4 is compressed, the middle axle suspension oil cylinder 1 is stretched out after being buffered by the large cavity accumulator 6 .

The ring cavity accumulator 6 also plays a buffering role when the mid-bridge suspension cylinder stretches out.

When driving over pits or over ridges, etc., the suspension oil cylinder of the middle axle or rear axle will be compressed violently, which will cause the corresponding other oil cylinder to stretch out quickly. At this time, the large cavity accumulator 3 and the annular cavity accumulator 6 It plays a role of greatly delaying the impact, and protects the piston 15 of the oil cylinder from rigidly colliding with the end face of the guide ring 11 and the end face of the cylinder base 16 .

Claims (6)

1. Rear-axle suspension system in a kind of quarry tipper, characterized in that including jackshaft hanging oil cylinder, big chamber connector, big chamber Accumulator, Rear-axle suspension oil cylinder, ring cavity connector and ring cavity accumulator；

Jackshaft hanging oil cylinder and Rear-axle suspension oil cylinder one end are connect with vehicle bridge, and the other end is connect with vehicle frame；Jackshaft hanging oil cylinder is big Chamber, the big chamber of Rear-axle suspension oil cylinder pass through a big chamber connector respectively and are connected to big chamber accumulator, and jackshaft hanging oil cylinder ring cavity is with after Bridge hanging oil cylinder ring cavity passes through a ring cavity connector respectively and is connected to ring cavity accumulator.

2. Rear-axle suspension system in quarry tipper according to claim 1, characterized in that jackshaft hanging oil cylinder and/or There is the first hydraulic fluid port and the second hydraulic fluid port on the cylinder head of Rear-axle suspension oil cylinder；Oil is passed in and out with piston rod, fuse tube, receiving in cylinder body Big chamber and ring cavity；First hydraulic fluid port is connected to intracavitary greatly with fuse tube, and the first hydraulic fluid port is connected in outside with the big chamber connector；Ring cavity It is connected to by the inner cavity of damping hole, piston rod with the second hydraulic fluid port；Second hydraulic fluid port is connected in outside with the ring cavity connector.

3. Rear-axle suspension system in quarry tipper according to claim 1, characterized in that jackshaft hanging oil cylinder and rear axle The structure of hanging oil cylinder is identical.

4. Rear-axle suspension system in quarry tipper according to claim 1, characterized in that big chamber accumulator and ring cavity store Energy device is all made of the double accumulators of high-low pressure.

5. Rear-axle suspension system in quarry tipper according to claim 1, characterized in that the compression of jackshaft hanging oil cylinder When, oil liquid stretches out Rear-axle suspension cylinder action after big chamber accumulator buffering.

6. Rear-axle suspension system in quarry tipper according to claim 1, characterized in that the compression of Rear-axle suspension oil cylinder When, oil liquid stretches out the movement of jackshaft hanging oil cylinder after big chamber accumulator buffering.