Steering system of mining dump truck

Abstract

The utility model relates to the technical field of mining dump trucks, in particular to a steering system of a mining dump truck, which comprises a first emergency motor pump set, a proportional valve and an oil tank arranged below the first emergency motor pump set and the proportional valve. The other end of the first emergency motor pump set is connected with an oil tank, the other end of the first shuttle valve is connected with a main steering pump, the main steering pump is connected with a main steering motor and an auxiliary steering pump, and one end of the auxiliary steering pump is connected with a second shuttle valve and a second pressure switch. The first shuttle valve is connected with a first emergency motor pump set, the second shuttle valve is connected with a second filter and a second emergency motor pump set, the first shuttle valve is further connected with a second filter, and the second filter is provided with a first priority valve. The effects of improving the safety performance and reducing the cost are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mining dump truck technical field, concretely relates to a steering system of mining dump truck. BACKGROUND

[0002] The mining dump truck is a kind of carrier of mining transportation, and is an important vehicle for mining exploitation.The mining dump truck is equipped with a hydraulic system, and when the main hydraulic system fails, an accumulator is usually used as an emergency power source to quickly supply oil to the steering system, to ensure that the vehicle can continue to operate steering.

[0003] However, the emergency steering system in the form of an accumulator requires a larger capacity accumulator, which results in higher costs.Secondly, the accumulator is often in a pressure maintaining state, which not only can reduce the service life and reliability of the accumulator, but also requires pressure relief operation when disassembling and maintaining, increasing the complexity and safety risk of operation.In addition, the accumulator type emergency steering system can only maintain the steering of the vehicle for a short time, and when the hydraulic energy stored in the accumulator is released, the steering system will completely lose the power source and cannot continuously provide steering power.Furthermore, the system structure is complex, and the oil pump needs to be kept at a constant oil pressure, resulting in short oil pump life, serious leakage, high power consumption and high fuel consumption.

[0004] Therefore, it is necessary to provide a new steering system for a mining dump truck. UTILITY MODEL CONTENTS

[0005] Based on the technical problems existing in the prior art, the utility model provides a steering system for a mining dump truck, which improves safety performance and reduces costs by using a first emergency motor pump set and a second emergency motor pump set in cooperation with a main steering pump 6 and an auxiliary steering pump.

[0006] The utility model solves the technical problems by adopting the technical scheme of providing a steering system for a mining dump truck, which comprises a first emergency motor pump set and a proportional valve, an oil tank arranged below the first emergency motor pump set and the proportional valve, a first shuttle valve connected to one end of the first emergency motor pump set, the other end of the first emergency motor pump set connected to the oil tank, the other end of the first shuttle valve connected to a main steering pump, the main steering pump connected to a main steering motor and an auxiliary steering pump, one end of the auxiliary steering pump connected to a second shuttle valve and a second pressure switch, a first filter and a second emergency motor pump set connected to the second shuttle valve, a second filter also connected to the first shuttle valve, a first priority valve arranged on the second filter, the second filter connected to the first priority valve, the first priority valve connected to a steering gear, the steering gear connected to a main steering cylinder, the first priority valve also connected to the proportional valve, and the proportional valve connected to an auxiliary steering cylinder.

[0007] Further, the main steering pump, the auxiliary steering pump, the priority valve, the first emergency motor pump group, the second emergency motor pump group, the one-way valve and the proportional valve are connected with the oil tank.

[0008] Further, the oil tank is provided with a liquid level gauge and a temperature sensor.

[0009] Further, the main steering pump is provided with a first pressure switch, and the first pressure switch is connected with the first shuttle valve and the main steering pump.

[0010] Further, the auxiliary steering pump is provided with a second pressure switch, and the second pressure switch is connected with the auxiliary steering pump, the first filter and the second emergency motor pump group.

[0011] Further, the first priority valve and the proportional valve are connected with a one-way valve, and the one-way valve is connected with a cooler in parallel, and the cooler is used for heat dissipation of the whole hydraulic steering system.

[0012] Further, the second filter sends the cleaned hydraulic oil to the second priority valve.

[0013] Further, the first filter is connected with the second priority valve, and the second priority valve is connected with the one-way valve, and the first filter sends the cleaned hydraulic oil to the second priority valve.

[0014] Further, the main steering pump sends the hydraulic oil in the oil tank to the main steering system, and converts the mechanical energy of the main steering motor into hydraulic energy.

[0015] Further, the first emergency motor pump group comprises a first emergency safety valve, a first emergency pump and a first emergency motor, and the second emergency motor pump group comprises a second emergency safety valve, a second emergency pump and a second emergency motor.

[0016] The utility model discloses a beneficial effect is: when needing the steering of mine dump truck, the steering wheel is rotated and drives the steering gear to work, and the main steering motor works, and drives the main steering pump to work, and the main steering pump sucks the hydraulic oil in the oil tank, and the mechanical energy of main steering motor is converted into hydraulic energy, in this process, if the first pressure switch detects the anomaly, then the first emergency motor pump group starts to work, and the first emergency motor rotates and drives the first emergency pump to suck the hydraulic oil, and the first emergency safety valve is used to guarantee the first emergency motor and the first emergency pump, prevents the first emergency motor superpower damage motor and prevents the first emergency pump overpressure damage, and the hydraulic oil is passed through second filter and is led to the first priority valve, and is sent into the main steering cylinder, and two main steering cylinders adjust the steering axle according to the rotation angle of steering wheel, and then reach the effect of adjusting the front tire angle, in the process of adjusting the front wheel, if the angle of the steering gear is greater than the angle threshold of angle sensor, then the signal is transmitted to the proportional valve, and the main steering motor drives the main steering pump and auxiliary steering pump simultaneously, and the auxiliary steering pump sucks the hydraulic oil, in this process, if the second pressure switch detects the anomaly, then the second emergency motor pump group starts to work, and the second emergency motor rotates and drives the second emergency pump to suck the hydraulic oil, and the second emergency safety valve is used to guarantee the second emergency motor and the second emergency pump normal work, and the hydraulic oil is transported to the second priority valve through the first filter, and the second priority valve is sent into the auxiliary steering cylinder after the proportional valve adjustment, and then the output end of two auxiliary steering cylinders is adjusted to the rear steering axle of dump truck, and then the tire direction is adjusted, and through the use of the first emergency motor pump group and the second emergency motor pump group and the main steering pump and auxiliary steering pump cooperation, reach the effect of improving safety performance and reducing cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and examples.

[0018] Figure 1 It is the structure schematic diagram of the steering system of mine dump truck provided by the utility model,

[0019] Figure 2 It is the structure schematic diagram of the steering system of mine dump truck provided by the utility model, Figure 1 It is the structure schematic diagram of the steering system of mine dump truck provided by the utility model,

[0020] Figure 3 It is the structure schematic diagram of the steering system of mine dump truck provided by the utility model, Figure 1 It is the structure schematic diagram of the steering system of mine dump truck provided by the utility model,

[0021] The names and numbers of parts in the drawings are as follows:

[0022] The steering system of mine dump truck 100,

[0023] First emergency motor pump group 1, first emergency safety valve A11, first emergency pump A12, first emergency motor A13; air filter 2; first shuttle valve 31, second shuttle valve 32; first pressure switch 41, second pressure switch 42; main steering motor 5; main steering pump 6; auxiliary steering pump 7; temperature sensor 8; first priority valve 91, second priority valve 92; first filter 101, second filter 102; steering gear 11; main steering cylinder; main steering cylinder 12; second emergency safety valve 131, second emergency pump 132, second emergency motor 133; check valve 14; cooler 15; oil tank 16; liquid level gauge 17; proportional valve 18; auxiliary steering cylinder 19. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer, the utility model will be described in detail in conjunction with the drawings. The drawing is a simplified schematic diagram, which only schematically illustrates the basic of the utility model, and therefore only shows the structure related to the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] Embodiment one,

[0026] As Figure 1 shown, the embodiment provides a steering system of a mine dump truck, which comprises a first emergency motor pump group 1 and a proportional valve 18, an oil tank 16 arranged below the first emergency motor pump group 1 and the proportional valve 18, one end of the first emergency motor pump group 1 being connected with a first shuttle valve 31, the other end of the first emergency motor pump group 1 being connected with the oil tank 16, the other end of the first shuttle valve 31 being connected with a main steering pump 6, the main steering pump 6 being connected with a main steering motor 5 and an auxiliary steering pump 7 respectively, one end of the auxiliary steering pump 7 being connected with a second shuttle valve 32 and a second pressure switch 42, the second shuttle valve 32 being connected with a first filter 101 and a second emergency motor pump group 13, the first shuttle valve 31 being further connected with a second filter 102, the second filter 102 being provided with a first priority valve 91, the second filter 102 being connected with the first priority valve 91, the first priority valve 91 being connected with a steering gear 11, the steering gear 11 being connected with a main steering cylinder 12, the first priority valve 91 being further connected with the proportional valve 18, the proportional valve 18 being connected with an auxiliary steering cylinder 19.

[0027] The first emergency motor A13, the first shuttle valve 31, the main steering pump 6, the main steering motor 5, the first pressure switch 41, the second filter 102, the first shuttle valve 31, the first priority valve 91, the steering gear 11 and the main steering cylinder 12 combine to form a main steering system.

[0028] The auxiliary steering pump 7, the main steering motor 5, the second pressure switch 42, the second shuttle valve 32, the first filter 101, the second priority valve 92, the proportional valve 18, the steering gear 11 and the auxiliary steering cylinder 19 combine to form an auxiliary steering system.

[0029] The steering gear 11 is a core element of the main steering system, and the left and right steering of the vehicle is realized by driving the steering gear 11 to rotate in opposite directions through the steering wheel of the dump truck; the steering gear 11 internally integrates an oil supplement check valve and an overload buffer valve. The overload buffer valve has an overload protection function, and also has a buffering function for the main steering cylinder 12.

[0030] The proportional valve 18 is a core element of the auxiliary steering system, and the angle and direction of the auxiliary steering are controlled through the angle of the main steering; an angle sensor is arranged on the steering gear 11, the angle sensor sets an angle threshold, and when the angle of the steering gear 11 exceeds the threshold of the angle sensor, a signal is transmitted to the proportional valve 18 to control the action of the proportional valve 18 and control the auxiliary steering.

[0031] The auxiliary steering cylinder 19 is a driving element of the auxiliary steering mechanism, which realizes the steering function of the vehicle by driving the drag arm on the steering axle, and is connected to the steering axle through the output end of the auxiliary cylinder for adjusting the direction of the rear tire of the dump truck.

[0032] Referring to Figure 2 , the first emergency motor pump group 1 includes a first emergency safety valve A11, a first emergency pump A12 and a first emergency motor A13, the first shuttle valve 31 is installed at the outlet of the first emergency motor pump group 1 and the main steering pump 6, the first shuttle valve 31 is used to protect the first emergency pump A12 from damage caused by system pressure impact, at the same time, the first emergency motor A13 is reversed, which causes the failure of the emergency function of the first emergency motor A13 pump, the first emergency safety valve A11 is used to protect the first emergency motor A13 and the first emergency pump A12, to prevent the first emergency motor A13 from being damaged by over-power and the first emergency pump A12 from being damaged by over-pressure.

[0033] Referring to Figure 3The second emergency motor pump group 13 includes a second emergency safety valve 131, a second emergency pump 132 and a second emergency motor 133, and the second shuttle valve 32 is installed at the outlet of the second emergency motor pump group 13 and the auxiliary steering pump 7, for protecting the second emergency pump 132 from damage caused by system pressure impact, and preventing the second emergency motor 133 from being reversed, which causes the failure of the emergency function of the second emergency motor pump group 13.

[0034] The first pressure switch 41 is used for monitoring the first emergency pump A12, and the second pressure switch 42 is used for monitoring the pressure of the second emergency pump 132 and outputting a signal to the controller, so that the driver is fed back through the alarm display on the control panel that the emergency steering is in working condition.

[0035] The second filter 102 is used for protecting the cleanliness of the hydraulic oil entering the first priority valve 91, preventing the first priority valve 91 from being stuck, and causing the abnormal function of the steering system.

[0036] The first filter 101 is used for protecting the cleanliness of the hydraulic oil entering the second priority valve 92, preventing the second priority valve 92 from being stuck, and causing the abnormal function of the steering system.

[0037] The first priority valve 91 and the second priority valve 92 can limit the maximum pressure of the system, ensure the flow of the steering system, and reduce the energy consumption of the hydraulic system when the steering is not working.

[0038] The main steering oil cylinder 12 and the auxiliary steering oil cylinder 19 are driving elements of the steering mechanism, and the output shafts of the main steering oil cylinder 12 and the auxiliary steering oil cylinder 19 drive the drag arm on the steering axle to realize the steering function of the vehicle.

[0039] The main steering oil cylinder 12 and the auxiliary steering oil cylinder 19 are both provided with two, when one output shaft is extended, the other output shaft is retracted, to achieve the effect of adjusting the steering axle of the dump truck, and the steering axle is connected with the steering tire, that is, the tire angle is adjusted.

[0040] The main steering motor 5 provides a power source for the steering system during normal driving, the main steering pump 6 provides hydraulic oil for the main steering system and converts the mechanical energy of the main steering motor 5 into hydraulic energy, the auxiliary steering pump 7 provides hydraulic oil for the auxiliary steering system and converts the mechanical energy of the main steering motor 5 into hydraulic energy, and the main steering motor 5 can drive the main steering pump 6 and the auxiliary steering pump 7 at the same time.

[0041] The main steering pump 6, the auxiliary steering pump 7, the priority valve, the first emergency motor pump group 1, the second emergency motor pump group 13, the one-way valve 14 and the proportional valve 18 are all connected with the oil tank 16. The oil tank 16 is an energy storage container for hydraulic oil, and also provides heat dissipation function for the hydraulic oil.

[0042] The first emergency motor pump group 1 and the second emergency motor pump group 13 provide power sources for the main steering system and the auxiliary steering system in the emergency state respectively.

[0043] The oil tank 16 is provided with a liquid level gauge 17 and a temperature sensor 8.

[0044] The first pressure switch 41 is arranged above the main steering pump 6 and is connected with the first shuttle valve 31 and the main steering pump 6.

[0045] The second pressure switch 42 is arranged on the auxiliary steering pump 7 and is connected with the auxiliary steering pump 7, the first filter 101 and the second emergency motor pump group 13.

[0046] The one-way valve 14 is connected between the first priority valve 91 and the proportional valve 18, and the cooler 15 is connected in parallel with the one-way valve 14.

[0047] The second filter 102 sends the cleaned hydraulic oil to the second priority valve 92.

[0048] The first filter 101 is connected with the second priority valve 92, and the second priority valve 92 is connected with the first priority valve 91 and the one-way valve 14.

[0049] The main steering pump 6 sends the hydraulic oil in the oil tank 16 to the main steering system and converts the mechanical energy of the main steering motor 5 into hydraulic energy.

[0050] The first emergency motor pump group 1 and the second emergency motor pump group 13 are integrated with the first emergency safety valve A11 and the second emergency safety valve 131 respectively, which are used to limit the maximum pressure of the emergency system and play a safety protection role.

[0051] When the mine dump truck needs to turn, the steering wheel is turned to drive the steering gear 11 to work, the main steering motor 5 works to drive the main steering motor 5 to work, and the main steering motor 5 sucks the hydraulic oil in the oil tank 16 to convert the mechanical energy of the main steering motor 5 into hydraulic energy. In this process, if the first pressure switch 41 detects an abnormality, the first emergency motor pump group 1 starts to work, the first emergency motor A13 rotates to drive the first emergency pump A12 to suck hydraulic oil, and the first emergency safety valve A11 is used to ensure the normal work of the first emergency motor A13 and the first emergency pump A12. The hydraulic oil passes through the second filter 102 and enters the first priority valve 91, and then is sent to the main steering oil cylinder 12. The two main steering oil cylinders 12 adjust the steering axle according to the rotation angle of the steering wheel, thereby achieving the effect of adjusting the angle of the front tire.

[0052] In the process of adjusting the front wheel, if the angle of the steering gear 11 is greater than the angle threshold of the angle sensor, the signal is transmitted to the proportional valve 18, the main steering motor 5 drives the main steering pump 6 and the auxiliary steering pump 7 at the same time, the auxiliary steering pump 7 sucks the hydraulic oil, in this process, if the second pressure switch 42 detects an abnormality, the second emergency motor pump group 13 starts to work, the second emergency motor 133 rotates to drive the second emergency pump 132 to suck hydraulic oil, and the second emergency safety valve 131 is used to ensure the normal work of the second emergency motor 133 and the second emergency pump 132. The hydraulic oil is transported to the second priority valve through the first filter 101, and then is sent to the auxiliary steering oil cylinder 19 through the second priority valve 92 adjusted by the proportional valve 18, and then is adjusted through the output end of the two auxiliary steering oil cylinders 19. The rear steering axle of the dump truck is adjusted, thereby adjusting the direction of the tire. By simultaneously equipping the main and auxiliary steering axles with emergency steering function, the effect of still being able to perform emergency steering function after the main steering pump 6 or the auxiliary steering pump 7 fails is achieved. By using the first emergency motor pump group 1 and the second emergency motor pump group 13 in cooperation with the main steering pump 6 and the auxiliary steering pump 7, the effect of improving safety performance and reducing cost is achieved.

[0053] In example two, the main / auxiliary steering system independent emergency pump group design is cancelled, the first emergency motor pump group 1 and the second emergency motor pump group 13 are modified into a bidirectional switchable pump group, and a three-way reversing valve (not shown in the figure) is added in parallel with the main steering pump 6 and the auxiliary steering pump 7.

[0054] When the main steering pump 6 or the auxiliary steering pump 7 pressure is abnormal, the three-way reversing valve automatically switches to the corresponding emergency pump group to realize seamless emergency power supply of the main and auxiliary systems. When the main steering pump 6 fails, the first emergency motor pump group 1 works, and when the auxiliary steering pump 7 fails, the second emergency motor pump group 13 works. The first emergency motor pump group 1 and the second emergency motor pump group 13 are installed together, reducing the space and allowing the same pipeline to be set, thereby reducing the hardware cost.

[0055] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the term "installation", "connection" should be understood in a broad sense, for example, it can be fixed connection, also can be detachable connection or integral connection, can be mechanical connection, can be direct connection or indirect connection through intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0056] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0057] The above is according to the ideal embodiment of the utility model for the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the scope of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A steering system for a mining dump truck, characterized by: The first emergency motor pump group and the proportional valve, the oil tank arranged below the first emergency motor pump group and the proportional valve, one end of the first emergency motor pump group is connected with the first shuttle valve, the other end of the first emergency motor pump group is connected with the oil tank, the other end of the first shuttle valve is connected with the main steering pump, the main steering pump is connected with the main steering motor and the auxiliary steering pump respectively, one end of the auxiliary steering pump is connected with the second shuttle valve and the second pressure switch, the first filter and the second emergency motor pump group are connected with the second shuttle valve, the second filter is also connected with the first shuttle valve, the first priority valve is arranged on the second filter, the second filter is connected with the first priority valve, the first priority valve is connected with the steering gear, the steering gear is connected with the main steering cylinder, the proportional valve is also connected with the first priority valve, the proportional valve is connected with the auxiliary steering cylinder.

2. A steering system for a mining dump truck as claimed in claim 1, characterised in that: The main steering pump, the auxiliary steering pump, the priority valve, the first emergency motor pump group, the second emergency motor pump group, the check valve and the proportional valve are connected with the oil tank.

3. A steering system for a mining dump truck as claimed in claim 1, characterized in that: The oil tank is installed with the liquid level meter and the temperature sensor.

4. A steering system for a mining dump truck as claimed in claim 1, characterized in that: The first pressure switch is arranged above the main steering pump, and the first pressure switch is connected with the first shuttle valve and the main steering pump.

5. A steering system for a mining dump truck as claimed in claim 1, characterized in that: The second pressure switch is arranged on the auxiliary steering pump, and the second pressure switch is connected with the auxiliary steering pump, the first filter and the second emergency motor pump group.

6. A steering system for a mining dump truck as claimed in claim 1, characterized in that: The check valve is connected between the first priority valve and the proportional valve, and the cooler is connected in parallel with the check valve, and the cooler is used for heat dissipation of the whole hydraulic steering system.

7. A steering system for a mining dump truck as claimed in claim 6, characterised in that: The second filter sends the cleaned hydraulic oil into the second priority valve.

8. A steering system for a mining dump truck as claimed in claim 7, characterised in that: The second priority valve is connected with the first filter, and the first filter is connected with the first priority valve and the check valve, and the first filter sends the cleaned hydraulic oil into the second priority valve.

9. A steering system for a mining dump truck as claimed in claim 1, characterized in that: The main steering pump sends the hydraulic oil in the oil tank to the main steering system, and converts the mechanical energy of the main steering motor into hydraulic energy.

10. A steering system for a mining dump truck as claimed in claim 1, characterized in that: The first emergency motor pump group comprises a first emergency safety valve, a first emergency pump and a first emergency motor, and the second emergency motor pump group comprises a second emergency safety valve, a second emergency pump and a second emergency motor.

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