CN220163981U - Emergency steering system of pure electric sanitation truck - Google Patents

Abstract

The utility model discloses an emergency steering system of a pure electric sanitation truck, which comprises a hydraulic oil tank, an electric steering pump connected with the hydraulic oil tank, a three-phase alternating current power supply system connected with the electric steering pump and supplying power to the electric steering pump, an emergency steering pump connected with the electric steering pump in parallel and connected with the hydraulic oil tank, a shuttle valve with two inlet ends connected with the electric steering pump and the emergency steering pump through pipelines respectively, a power-assisted steering mechanism connected with the shuttle valve through pipelines, and a low-voltage power supply system connected with the emergency steering pump. The utility model provides an emergency steering system of a pure electric sanitation vehicle, which adopts two sets of steering pumps which are mutually independent, can be automatically switched to the emergency steering pump when a high-pressure system or an electric steering pump fails, ensures the normal operation of the hydraulic power steering system, effectively reduces the running risk of the vehicle, well avoids unnecessary accidents, further improves the running safety of the vehicle and promotes the progress of the industry.

Description

Emergency steering system of pure electric sanitation truck

Technical Field

The utility model relates to the field of electric vehicles, in particular to an emergency steering system of a pure electric sanitation vehicle.

Background

In the prior art, a steering system on a pure electric sanitation truck is generally a hydraulic power steering system (as shown in fig. 1), a steering oil pump (3) in the hydraulic power steering system is driven by a motor to operate, the steering oil pump (3) provides oil pressure to push a piston, and further auxiliary power is generated to push a steering pull rod ⑪, so that steering of wheels is assisted.

The operation principle is as follows: the steering control valve (R) is positioned on the mechanical steering gear (6) and can rotate along with the steering column, when the steering wheel (9) arranged on the steering column does not rotate, the steering control valve (R) keeps in place, the oil pressure at the two sides of the piston in the steering valve (R) is the same, and the steering valve is in a balanced state. When the steering wheel (9) rotates, the steering control valve is correspondingly opened or closed, oil on one side directly flows back to the oil storage tank without passing through the hydraulic cylinder, and oil on the other side is continuously injected into the hydraulic cylinder, so that pressure difference is generated on two sides of the piston to be pushed, and further auxiliary force is generated to push the steering pull rod ⑪, and a driver can more easily complete steering control with the help of the steering pull rod ⑪.

However, if the high-voltage system is powered off due to sudden failure during running of the vehicle, the hydraulic power steering system of the vehicle will fail, and if the vehicle is still running, the driver may cause an improper operation such as too large or too small rotation force applied to the steering wheel (9) due to the abrupt steering force, thereby improving the safety risk of running of the vehicle and even causing an accident.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the emergency steering system of the pure electric sanitation vehicle, which adopts two sets of steering pumps which are mutually independent, can automatically switch to the emergency steering pump when a high-pressure system or an electric steering pump fails, ensures the normal operation of the hydraulic power-assisted steering system, effectively reduces the risk of vehicle running, well avoids unnecessary accidents, further improves the safety of vehicle running and promotes the progress of industry.

The utility model provides an emergent steering system of pure electric sanitation car, includes hydraulic tank, the electronic steering pump that is connected with hydraulic tank, be connected with the electronic steering pump and for its three-phase alternating current power supply system of supplying power, still include with the parallelly connected emergent steering pump that is connected with hydraulic tank of electronic steering pump, two entry ends respectively with electronic steering pump and emergent steering pump pass through the shuttle valve that the pipeline is connected, the power assisted steering mechanism who is connected with the shuttle valve through the pipeline, and the low pressure power supply system who is connected with emergent steering pump.

Further, the low-voltage power supply system is composed of a low-voltage storage battery and a contactor, wherein one end of a switch end of the contactor is connected with the low-voltage storage battery, and the other end of the switch end of the contactor is connected with an emergency steering pump.

Still further, the low-voltage power supply system is also provided with a VCU connected with the negative electrode of the low-voltage storage battery through the control end of the contactor and a pressure sensor connected with the VCU.

Preferably, the pressure sensor is disposed in a line between the shuttle valve and the power steering mechanism.

Preferably, the VCU is further connected to a vehicle-mounted instrument, and the vehicle-mounted instrument includes a fault lamp and a fault alarm.

Furthermore, an integrated control box is connected to the VCU, and the integrated control box is connected with a three-phase alternating current power supply system.

Compared with the prior art, the embodiment of the utility model has the following beneficial effects:

the utility model adopts two sets of steering pumps which are mutually independent, can automatically switch to the emergency steering pump when the high-pressure system or the electric steering pump fails, ensures the normal operation of the hydraulic power-assisted steering system, effectively reduces the risk of vehicle running, well avoids unnecessary accidents, further improves the safety of vehicle running and promotes the progress of industry.

Additional features of the utility model will be set forth in part in the description which follows. Additional features of part of the utility model will be readily apparent to those skilled in the art from a examination of the following description and the corresponding figures or a study of the manufacture or operation of the embodiments. The features of the present disclosure may be implemented and realized in the practice or use of the various methods, instrumentalities and combinations of the specific embodiments described below.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Like reference symbols in the various drawings indicate like elements. Wherein,

fig. 1 is a prior art system diagram.

Fig. 2 is a system diagram of the present utility model.

Reference numerals illustrate: 1. an electric steering pump; 2. an emergency steering pump; 3. a shuttle valve; 4. a pressure sensor; 5. a power steering mechanism; 6. VCU; 7. a contactor; 8. a low voltage battery; 9. a vehicle-mounted instrument; 10. an integrated control box; 11. a hydraulic oil tank; 12. a three-phase alternating current power supply system; 13. a low voltage power supply system; (1) steering oil pipe; (2) a flow control valve; (3) a steering oil pump; (4) a safety valve; (5) a one-way valve; (6) a mechanical diverter; (7) a steering rocker arm; (8) a power steering mechanism; (9) a steering wheel; a steering control valve; ⑪, steering tie rod.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that if the terms "first," "second," and the like are referred to in the description of the present utility model and the claims and the above figures, they are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. Furthermore, if the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present utility model, if the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are referred to, the indicated azimuth or positional relationship is based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Further, in the present utility model, the terms "mounted," "configured," "provided," "connected," "sleeved," and the like are to be construed broadly if they relate to. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

As shown in fig. 2, the emergency steering system of the electric sanitation truck comprises a hydraulic oil tank 11, an electric steering pump 1 connected with the hydraulic oil tank 11, a three-phase alternating current power supply system 12 connected with the electric steering pump 1 and supplying power to the electric steering pump 1, an emergency steering pump 2 connected with the electric steering pump 1 in parallel and connected with the hydraulic oil tank 11, a shuttle valve 3 with two inlet ends connected with the electric steering pump 1 and the emergency steering pump 2 through pipelines respectively, a power steering mechanism 5 connected with the shuttle valve 3 through pipelines, and a low-voltage power supply system 13 connected with the emergency steering pump 2.

The low-voltage power supply system 13 consists of a low-voltage storage battery 8 and a contactor 7, wherein one end of a switch end of the contactor is connected with the low-voltage storage battery 8, and the other end of the switch end of the contactor is connected with the emergency steering pump 2.

The contactor is the existing switch equipment, can control the on-off of the switch through the signal of VCU, and then realize the purpose that the automatically controlled emergent steering pump starts and closes, and the person skilled in the art need not through creative work according to the description can accomplish its setting and use, just need not to describe here in detail.

The low-voltage power supply system 13 is further provided with a VCU6 connected to the negative electrode of the low-voltage battery 8 through the control terminal of the contactor 7, and a pressure sensor 4 connected to the VCU 6.

The VCU is a whole vehicle controller, can judge whether the operation of the electric steering pump is normal according to the oil pressure fed back by the pressure sensor, and can reduce the pressure when judging that the operation of the electric steering pump is abnormal, so that the VCU can control the contactor to start supplying power to the emergency steering pump to ensure the normal operation of the power steering mechanism, and simultaneously, the VCU can feed back the abnormal condition of the electric steering pump on an instrument panel in a mode of displaying alarm and voice alarm, so that a driver can acquire the condition in time and stop the vehicle for inspection safely as soon as possible.

The pressure sensor 4 is arranged on the line between the shuttle valve 3 and the power steering mechanism 5.

The VCU6 is also connected with a vehicle-mounted instrument 9, and the vehicle-mounted instrument 9 comprises a fault lamp and a fault alarm.

An integrated control box 10 is connected to the VCU6, and the integrated control box 10 is connected to a three-phase ac power supply system 12.

Because the shuttle valve only allows one inlet to work when in actual use, the integrated control box cuts off the power supply of the three-phase alternating current power supply system to the electric steering pump after receiving the feedback signal of the VCU, thereby avoiding the occurrence of the condition that the electric steering pump and the emergency steering pump operate simultaneously, better ensuring the normal operation of the shuttle valve and avoiding the occurrence of the condition that the pipeline breaks due to the excessively high oil pressure in the pipeline.

Because the electric steering pump and the emergency steering pump are two sets of mutually independent systems, and different power supply systems are adopted for supplying power, the condition that the two sets of systems are simultaneously powered off can be greatly reduced, and the running stability of the power steering mechanism is better ensured.

It should be noted that all of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except mutually exclusive features and/or steps.

In addition, the foregoing detailed description is exemplary, and those skilled in the art, having the benefit of this disclosure, may devise various arrangements that, although not explicitly described herein, are within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents.

Claims (4)

1. The emergency steering system of the pure electric sanitation truck comprises a hydraulic oil tank (11), an electric steering pump (1) connected with the hydraulic oil tank (11), a three-phase alternating current power supply system (12) connected with the electric steering pump (1) and supplying power to the electric steering pump, and is characterized by also comprising an emergency steering pump (2) connected with the electric steering pump (1) in parallel and connected with the hydraulic oil tank (11), a shuttle valve (3) with two inlet ends connected with the electric steering pump (1) and the emergency steering pump (2) through pipelines respectively, a power-assisted steering mechanism (5) connected with the shuttle valve (3) through pipelines, and a low-voltage power supply system (13) connected with the emergency steering pump (2); the low-voltage power supply system (13) consists of a low-voltage storage battery (8) and a contactor (7) with one end connected with the low-voltage storage battery (8) and the other end connected with the emergency steering pump (2); the low-voltage power supply system (13) is also provided with a VCU (6) connected with the negative electrode of the low-voltage storage battery (8) through the control end of the contactor (7), and a pressure sensor (4) connected with the VCU (6).

2. A pure electric sanitation truck emergency steering system according to claim 1, characterized in that the pressure sensor (4) is arranged on the pipeline between the shuttle valve (3) and the power steering mechanism (5).

3. A pure electric sanitation truck emergency steering system according to claim 2, characterized in that the VCU (6) is further connected with a vehicle-mounted instrument (9), the vehicle-mounted instrument (9) comprising a fault light and a fault alarm.

4. A pure electric sanitation truck emergency steering system according to claim 3, characterized in that the VCU (6) is connected with an integrated control box (10), and the integrated control box (10) is connected with a three-phase alternating current power supply system (12).