CN111186483B - Steering hydraulic pump suitable for heavy vehicle emergency working condition - Google Patents
Steering hydraulic pump suitable for heavy vehicle emergency working condition Download PDFInfo
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- CN111186483B CN111186483B CN202010130739.XA CN202010130739A CN111186483B CN 111186483 B CN111186483 B CN 111186483B CN 202010130739 A CN202010130739 A CN 202010130739A CN 111186483 B CN111186483 B CN 111186483B
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- driving
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- pipeline
- liquid outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/061—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle provided with effort, steering lock, or end-of-stroke limiters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
- B62D5/063—Pump driven by vehicle engine
Abstract
The invention discloses a steering hydraulic pump suitable for an emergency working condition of a heavy vehicle, which can automatically keep an effective steering boosting effect in a certain period of time under the condition that an engine stops running and needs emergency steering when the vehicle, particularly the heavy vehicle, encounters the emergency working condition, so that a driver can immediately execute effective steering operation after the engine stops running; therefore, the steering hydraulic pump suitable for the emergency working condition of the heavy vehicle solves the technical problem that the safety of the heavy vehicle under the emergency working condition cannot be guaranteed because the steering hydraulic pump cannot perform steering boosting immediately after the engine stops running in the related technology, so that the effect of effectively ensuring the safety of the heavy vehicle and personnel under the emergency working condition is achieved.
Description
Technical Field
The invention relates to the field of vehicle engineering, in particular to a steering hydraulic pump suitable for emergency working conditions of a heavy vehicle.
Background
In the running process of the vehicle, in order to ensure that a driver can provide enough torque for the steering transmission mechanism when steering, a steering boosting device such as a steering hydraulic pump and the like is often arranged between the steering control mechanism and the steering transmission mechanism. In the actual working process of the steering hydraulic pump in the related art, the mechanical energy output by a vehicle engine can be converted into pressure energy inside the steering hydraulic pump, and then in the steering process of a driver, a hydraulic action can be applied to a steering transmission mechanism to perform steering boosting.
The steering hydraulic pump in the above related art is driven by the engine, and in a case where the engine stops operating, the steering hydraulic pump outputs no pressure oil. For this reason, some steering mechanisms are equipped with corresponding auxiliary drive units, such as motors and the like, to drive the steering hydraulic pumps when the engine is stopped. However, stopping the engine while the vehicle is running is often accompanied by an emergency braking by the driver, or even a loss of control of the vehicle, under which conditions the driver is often required to turn the vehicle in an emergency. During the brief interval between the engine shutdown and the intervention of the auxiliary drive unit in the operation of the steering hydraulic pump, the steering hydraulic pump cannot be driven efficiently, making it difficult to control the steering of the vehicle during this brief interval. For some vehicles, such as heavy vehicles, after the vehicle is in an emergency condition, the steering of the vehicle is not controlled briefly, so that the vehicle cannot avoid risks effectively, and the safety of the vehicle is further affected seriously.
In order to solve the technical problem that steering boosting cannot be immediately performed on a steering hydraulic pump after an engine stops operating so that safety of a heavy vehicle cannot be guaranteed under an emergency working condition in the related art, an effective solution is not provided in the related art.
Disclosure of Invention
The invention aims to provide a steering hydraulic pump suitable for the emergency working condition of a heavy vehicle, which can solve the technical problem that the safety of the heavy vehicle under the emergency working condition cannot be guaranteed because the steering hydraulic pump cannot immediately perform steering boosting after an engine stops running in the related technology.
To solve the above technical problem, the present invention relates to a steering hydraulic pump suitable for emergency operation of a heavy vehicle, comprising: the pump comprises a pump body, wherein an inner cavity is formed in the pump body, and a liquid inlet and a liquid outlet which are communicated with the inner cavity are also formed in the pump body; a diversion cavity is arranged in the inner cavity, a driving gear and a driven gear which are meshed with each other are arranged in the diversion cavity, the driving gear is driven to rotate through an external driving shaft, and the inner cavity is also provided with a liquid inlet cavity and a liquid outlet cavity, wherein the liquid inlet cavity is formed between the liquid inlet and the diversion cavity, and the liquid outlet cavity is formed between the liquid outlet and the diversion cavity;
still be provided with booster unit among the pump body, booster unit includes:
the liquid inlet cavity is communicated with the liquid outlet cavity through a liquid inlet pipeline, a first one-way valve is arranged in the liquid inlet pipeline and used for communicating the liquid inlet cavity with the liquid outlet cavity, a liquid outlet pipeline is arranged between the boosting cavity and the liquid outlet cavity, and a second one-way valve is arranged in the liquid outlet pipeline and used for communicating the boosting cavity with the liquid outlet cavity;
the driving cavity is internally provided with a driving piston, a first driving pipeline communicated to the liquid outlet cavity and a second driving pipeline communicated to the boosting cavity are arranged in the driving cavity, and the driving piston is arranged between the first driving pipeline and the second driving pipeline; the driving cavity is also internally provided with a first driving seat and a second driving seat, the first driving seat is arranged on the inner wall of the driving cavity at one side of the first driving pipeline, and the second driving seat is arranged on the inner wall of the driving cavity at one side of the second driving pipeline; a first driving unit is arranged between the driving piston and the first driving seat, and a second driving unit is arranged between the driving piston and the second driving seat;
the first drive unit and the second drive unit are configured such that, in the case where the drive gear is driven to move by the drive shaft, the drive piston compresses the second drive unit under hydraulic pressure to close the second drive duct; and under the condition that the driving gear is not driven by the driving shaft to move, the driving piston enables the second driving pipeline to be opened under the driving of the second driving unit and compresses the first driving unit;
and a third one-way valve is further arranged on the driving piston and used for conducting the first driving pipeline to one side of the second driving pipeline.
In an alternative embodiment, the liquid inlet chamber adopts a U-shaped structure, wherein the liquid inlet chamber comprises a first chamber and a second chamber, the first chamber extends downwards from the liquid inlet, and the second chamber extends downwards from the flow guide chamber; the liquid outlet chamber extends downwards from the flow guide chamber; the boosting chamber and the driving chamber are both arranged between the second subchamber and the liquid outlet chamber, the driving chamber is positioned on the upper side of the boosting chamber, and the second driving pipeline extends between the driving chamber and the boosting chamber;
the first driving pipeline comprises a bending part in a U-shaped structure, and the pipe diameter of the end part of the first driving pipeline, which is positioned on one side of the liquid outlet cavity, is smaller than that of the bending part.
In an optional embodiment, the liquid outlet pipeline extends from the power-assisted chamber to the liquid outlet chamber in an inclined and downward manner, and the axial direction of the liquid outlet pipeline is intersected with the axial direction of the liquid outlet; the pipe diameter of the liquid outlet pipeline is gradually reduced from the power-assisted cavity to the liquid outlet cavity, and an internal thread structure is arranged on the inner wall of the liquid outlet pipeline.
In an optional embodiment, the first driving unit is composed of a plurality of driving rods and a plurality of first driving springs, the plurality of first driving springs correspond to the plurality of driving rods one by one, and the plurality of first driving springs are respectively arranged outside the driving rods; the second driving unit is composed of a plurality of second driving springs, and the number of the second driving springs is larger than that of the first driving springs;
the driving rod comprises a first rod connected to the first driving seat and a second rod connected to the driving piston, a cavity is formed in the first rod, and the second rod extends into the first rod; a fourth one-way valve and a fifth one-way valve are arranged in the first rod piece, wherein the fourth one-way valve is used for enabling the outside of the first rod piece to be communicated to the inside of the first rod piece under the condition that the driving gear is driven by the driving shaft to move, and the fifth one-way valve is used for enabling the inside of the first rod piece to be communicated to the outside of the first rod piece under the condition that the second rod piece compresses the cavity of the first rod piece;
a plurality of third driving springs are further arranged in the driving chamber and comprise fixed ends and supporting ends, wherein the fixed ends are fixed on the first driving seat, and the supporting ends and the driving piston are opposite to each other; under the condition that the driving gear is driven by the driving shaft to move, a non-contact structure is arranged between the supporting end and the driving piston.
In an optional embodiment, a liquid storage chamber is arranged in the driving piston, the liquid storage chamber extends to the position above the end face of the driving piston on the side opposite to the first driving pipeline, and the third one-way valve is arranged on the inner wall of the liquid storage chamber and the end face of the driving piston on the side opposite to the second driving pipeline;
the liquid storage cavity comprises a liquid inlet part and a liquid storage part, wherein the liquid inlet part is communicated to the upper part of the end face of the driving piston; the width of any position in the liquid storage part is larger than that of the liquid inlet part, and at least part of the liquid storage part is positioned between the liquid inlet part and the side wall of the driving piston.
The steering hydraulic pump suitable for the emergency working condition of the heavy vehicle can automatically keep an effective steering boosting effect in a certain period of time under the condition that the vehicle, particularly the heavy vehicle, stops running due to the emergency working condition and needs emergency steering, so that a driver can immediately execute effective steering operation after the engine stops running; therefore, the steering hydraulic pump suitable for the emergency working condition of the heavy vehicle solves the technical problem that the safety of the heavy vehicle under the emergency working condition cannot be guaranteed because the steering hydraulic pump cannot perform steering boosting immediately after the engine stops running in the related technology, so that the effect of effectively ensuring the safety of the heavy vehicle and personnel under the emergency working condition is achieved.
Drawings
FIG. 1 is a schematic diagram of a steering hydraulic pump for heavy-duty vehicle emergency operation according to an embodiment of the present invention;
FIG. 2 is a schematic internal view of a first drive conduit provided in accordance with an embodiment of the present invention;
FIG. 3 is an internal schematic view of a liquid outlet pipe provided according to an embodiment of the present invention;
FIG. 4 is a schematic view of the interior of a drive chamber provided in accordance with an embodiment of the present invention;
FIG. 5 is an internal view of a first rod according to an embodiment of the present invention;
fig. 6 is a schematic view of the interior of a drive piston provided in accordance with an embodiment of the present invention.
List of reference numerals:
1-pump body, 2-liquid inlet, 3-liquid outlet, 4-diversion chamber, 5-driving gear, 6-driven gear, 7-liquid inlet chamber, 701-first chamber, 702-second chamber, 8-liquid outlet chamber, 9-boosting chamber, 10-liquid inlet pipeline, 11-first one-way valve, 12-liquid outlet pipeline, 13-second one-way valve, 14-driving chamber, 15-driving piston, 16-first driving pipeline, 1601-bending part, 17-second driving pipeline, 18-first driving seat, 19-second driving seat, 20-first driving unit, 21-second driving unit, 22-third one-way valve, 23-driving rod piece, 2301-first rod piece, 2302-second rod piece, 24-first driving spring, 25-second driving spring, 26-fourth one-way valve, 27-fifth one-way valve, 28-third driving spring, 2801-fixed end, 2-supporting end 280fixed end, 29-liquid storage chamber, 2901-liquid inlet part, 2902-liquid storage part.
Detailed Description
The present invention will be further illustrated below with reference to specific embodiments, which are to be understood as merely illustrative and not limitative of the scope of the present invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1
Fig. 1 is a schematic structural diagram of a steering hydraulic pump for heavy-duty vehicle emergency operation according to an embodiment of the present invention, and as shown in fig. 1, the steering hydraulic pump for heavy-duty vehicle emergency operation in the embodiment includes: the pump comprises a pump body 1, wherein an inner cavity is formed in the pump body 1, and a liquid inlet 2 and a liquid outlet 3 which are communicated with the inner cavity are also formed in the pump body 1; a diversion chamber 4 is arranged in the inner cavity, a driving gear 5 and a driven gear 6 which are meshed with each other are arranged in the diversion chamber 4, the driving gear 5 is driven to rotate by an external driving shaft (not shown in fig. 1, the driving shaft can be driven by an engine), the inner cavity is also provided with a liquid inlet chamber 7 and a liquid outlet chamber 8, wherein the liquid inlet chamber 7 is formed between the liquid inlet 2 and the diversion chamber 4, and the liquid outlet chamber 8 is formed between the liquid outlet 3 and the diversion chamber 4;
still be provided with booster unit among the pump body, booster unit includes:
a boosting cavity 9, wherein the boosting cavity 9 is arranged between the liquid inlet cavity 7 and the liquid outlet cavity 8, a liquid inlet pipeline 10 is arranged between the boosting cavity 9 and the liquid inlet cavity 7, a first one-way valve 11 is arranged in the liquid inlet pipeline 10, the first one-way valve 11 is used for communicating the liquid inlet cavity 7 to the boosting cavity 9, a liquid outlet pipeline 12 is arranged between the boosting cavity 9 and the liquid outlet cavity 8, a second one-way valve 13 is arranged in the liquid outlet pipeline 12, and the second one-way valve 13 is used for communicating the boosting cavity 9 to the liquid outlet cavity 8;
a driving chamber 14, a driving piston 15 is arranged inside the driving chamber 14, a first driving pipeline 16 communicated with the liquid outlet chamber 8 and a second driving pipeline 17 communicated with the boosting chamber 9 are arranged in the driving chamber 14, and the driving piston 15 is arranged between the first driving pipeline 16 and the second driving pipeline 17; a first driving seat 18 and a second driving seat 19 are further arranged in the driving chamber 14, the first driving seat 18 is arranged on the inner wall of the driving chamber 14 on the side of the first driving pipeline 16, and the second driving seat 19 is arranged on the inner wall of the driving chamber 14 on the side of the second driving pipeline 17; a first driving unit 20 is arranged between the driving piston 15 and the first driving seat 18, and a second driving unit 21 is arranged between the driving piston 15 and the second driving seat 19;
the first drive unit 20 and the second drive unit 21 are configured such that, in the case where the driving gear 5 is driven to move by the driving shaft, the driving piston 15 compresses the second drive unit 21 under hydraulic pressure to close the second drive duct 17; and, in the case where the driving gear 5 is not driven by the driving shaft to move, the driving piston 15 opens the second driving duct 17 by the driving of the second driving unit 21 and compresses the first driving unit 20;
a third check valve 22 is further disposed on the driving piston 15, and the third check valve 22 is used for conducting the first driving pipeline 16 side to the second driving pipeline 17 side.
The hydraulic pump that turns to that is applicable to heavy vehicle emergency condition in this embodiment is at the actual work in-process, and under the engine normal operating's of vehicle situation, the engine passes through the drive shaft drive driving gear and the driven gear carries out work, and then makes the hydraulic pump that turns to in this embodiment exportable hydraulic pressure and then realize turning to the afterburning.
Meanwhile, in the process that the steering hydraulic pump is driven by the engine to work, hydraulic oil input from the liquid inlet can enter the boosting cavity through the liquid inlet pipeline in the liquid inlet cavity, so that the boosting cavity can be gradually filled with the hydraulic oil; on the other hand, since the steering hydraulic pump in the related art usually has a metering orifice (not shown in fig. 1, the aperture of the metering orifice is smaller than the pipe diameter of the liquid outlet) at the liquid outlet when outputting the hydraulic oil, so that the hydraulic oil is output through the metering orifice, the hydraulic pressure in the liquid outlet chamber is kept at a high state, and at this time, the hydraulic oil in the liquid outlet chamber can enter the driving chamber through the first driving pipeline under the hydraulic pressure and form a pushing action on the driving piston in the driving chamber; in addition, because the hydraulic pressure in the liquid outlet chamber is higher, the hydraulic pressure can also form reverse action on the second one-way valve in the liquid outlet pipeline, so that the second one-way valve is prevented from being conducted, and the hydraulic oil in the power assisting chamber is prevented from overflowing.
In this embodiment, when the driving gear is driven by the driving shaft to move, the driving piston can compress the second driving unit under hydraulic pressure to close the second driving pipeline, so that, during the operation of the steering hydraulic pump driven by the engine, the hydraulic oil entering the driving chamber through the first driving pipeline can push the driving piston until the driving piston closes the second driving pipeline.
It should be further noted that, in order to realize that the driving piston compresses the second driving unit under the hydraulic action to close the second driving pipeline, the hydraulic pressure borne by the driving piston during the normal operation of the steering hydraulic pump can be determined according to the volume of the steering hydraulic pump in the embodiment, and the like, and accordingly, the supporting force or the elastic force of the second driving unit is set to meet the requirement that the driving piston compresses the second driving unit under the hydraulic action to close the second driving pipeline.
Under the condition that the engine stops running due to the fact that a vehicle encounters an emergency working condition, the engine stops driving the driving gear, at the moment, the driving gear and the driven gear in the steering pump stop working, enough hydraulic oil does not exist in the liquid outlet chamber, and therefore the hydraulic pressure of the driving chamber is reduced; at this time, since the liquid outlet chamber cannot provide sufficient hydraulic support to the driving piston in the driving chamber through the first driving pipe, the driving piston moves toward the first driving pipe side by the second driving unit. In this embodiment, in the case that the driving gear is not driven by the driving shaft to move, the driving piston may open the second driving duct and compress the first driving unit under the driving of the second driving unit, so that the driving piston may move toward the first driving unit under the driving of the second driving unit, on one hand, open the second driving duct during the movement, and on the other hand, compress the first driving unit.
It should be further noted that, in order to realize that the driving piston can open the second driving pipeline and compress the first driving unit under the driving of the second driving unit, the supporting force or the elastic force corresponding to the first driving unit and the second driving unit can be set according to the requirement, so as to satisfy the requirement that the driving piston opens the second driving pipeline and compresses the first driving unit under the driving of the second driving unit.
The driving piston can enable the first driving unit to form a reverse supporting effect on the driving piston in the process of compressing the first driving unit, namely, the driving piston can move towards one side of the second driving unit again under the driving of the first driving unit after compressing the first driving unit to a certain amplitude; with this reciprocation, the driving piston can form a reciprocating motion in the driving chamber under the driving action of the first driving unit and the second driving unit and the self inertia action.
During the reciprocating motion of the driving piston, the part between the driving piston and the second driving pipeline in the driving cavity can be extruded, and then the hydraulic oil in the area enters the boosting cavity; the hydraulic oil between the driving piston in the driving chamber and the second driving pipeline is from the hydraulic oil overflowing to the area of the boosting chamber in the normal working stage of the steering hydraulic pump on one hand, and from the normal working stage of the steering hydraulic pump on the other hand, the hydraulic oil in the liquid outlet chamber is hydraulically introduced into the area through the third one-way valve above the driving piston, and in addition, the hydraulic oil accumulated between the driving piston in the driving chamber and the first driving unit is also guided into the area through the third one-way valve under the inertia effect in the reciprocating process of the driving piston. The driving piston repeatedly extrudes the part between the driving piston and the second driving pipeline, so that the area and the hydraulic oil in the boosting cavity are compressed and are led out through the second one-way valve under a certain hydraulic action, the led-out hydraulic oil can form effective hydraulic action in the liquid outlet cavity and is output outwards, and further the steering hydraulic pump in the embodiment can still form effective steering boosting action in a certain period of time.
By the steering hydraulic pump suitable for the emergency working condition of the heavy vehicle in the embodiment, the steering hydraulic pump can automatically keep an effective steering boosting effect in a certain period of time under the condition that the vehicle, particularly the heavy vehicle, stops running due to the emergency working condition and needs emergency steering, so that a driver can immediately execute effective steering operation after the engine stops running; therefore, the steering hydraulic pump suitable for the emergency working condition of the heavy-duty vehicle in the embodiment solves the technical problem that the steering hydraulic pump cannot immediately perform steering boosting after an engine stops running so as to cause the safety of the heavy-duty vehicle under the emergency working condition to be incapable of being guaranteed in the related technology, and the effect of effectively ensuring the safety of the vehicle and personnel of the heavy-duty vehicle under the emergency working condition is achieved.
In an alternative embodiment, the inlet chamber 7 adopts a "U" shape, wherein the inlet chamber 7 includes a first chamber 701 extending downward from the inlet 2, and a second chamber 702 extending downward from the guide chamber 4; the liquid outlet chamber 3 extends downwards from the flow guide chamber 4; the boosting chamber 9 and the driving chamber 14 are both arranged between the second sub-chamber 702 and the liquid outlet chamber 3, the driving chamber 14 is located on the upper side of the boosting chamber 9, and the second driving pipeline 17 extends between the driving chamber 14 and the boosting chamber 9;
fig. 2 is a schematic internal view of a first driving pipeline provided according to an embodiment of the present invention, as shown in fig. 2, a bent portion 1601 in a "U" shape structure is included in the first driving pipeline 16, and a pipe diameter of an end portion of the first driving pipeline 16 on the liquid outlet chamber 8 side is smaller than a pipe diameter of the bent portion 1601.
It should be further noted that, in the normal working process of the steering hydraulic pump, the liquid inlet chamber of the U-shaped structure can prevent the input hydraulic oil from directly entering the diversion chamber, and the input hydraulic oil is accumulated through the liquid inlet chamber of the U-shaped structure, so as to ensure that part of the hydraulic oil can enter the boosting chamber through the liquid inlet pipeline. Meanwhile, the structural design of the liquid outlet cavity can enable the hydraulic oil to be output downwards under the action of self weight when being output, so that the oil circuit of the hydraulic oil output by the power assisting cavity is more efficient when the power assisting cavity is matched with the liquid outlet cavity to output the hydraulic oil; on the other hand, the structural design of the boosting cavity and the driving cavity can enable the driving piston to compress and push hydraulic oil in the boosting cavity by using the self weight of the hydraulic oil in the reciprocating motion process, so that the pressure of the hydraulic oil output by the boosting cavity is improved.
In addition, the design of the bending part in the first driving pipeline can prevent the hydraulic oil entering the first driving pipeline from overflowing from the first driving pipeline again on one hand, and on the other hand, the pipe diameter of the bending part is larger than the end part of the first driving pipeline, so that a certain adsorption effect can be formed in the bending part relative to the outside of the first driving pipeline, and the efficiency of the hydraulic oil outside the driving cavity entering the inside of the driving cavity is further improved.
In an alternative embodiment, fig. 3 is a schematic internal view of a liquid outlet pipe provided according to an embodiment of the present invention, as shown in fig. 3, the liquid outlet pipe 12 extends obliquely downward from the power assisting chamber 9 to the liquid outlet chamber 8, and an axial direction of the liquid outlet pipe 12 intersects with an axial direction of the liquid outlet 3; the pipe diameter of the liquid outlet pipe 12 is gradually reduced in the direction from the power-assisted cavity 9 to the liquid outlet cavity 3, and an internal thread structure is arranged on the inner wall of the liquid outlet pipe 12.
It should be further noted that, the liquid outlet pipeline is configured to enable the hydraulic oil output by the boost chamber to naturally output toward the axial center of the liquid outlet, and since the liquid outlet is often connected with a metering orifice (not shown in fig. 1), the hydraulic oil output under the above conditions can be output while maintaining the maximum hydraulic pressure. Meanwhile, the internal structure design of the liquid outlet pipeline can enable the liquid outlet pipeline to form effective pressurization treatment in the process of outputting hydraulic oil, so that the hydraulic pressure of the hydraulic oil output by the power assisting cavity is further improved.
In an alternative embodiment, fig. 4 is a schematic view of the interior of the driving chamber provided in the embodiment of the present invention, as shown in fig. 4, the first driving unit 20 is composed of a plurality of driving rods 23 and a plurality of first driving springs 24, the plurality of first driving springs 24 correspond to the plurality of driving rods 23 one by one, and the plurality of first driving springs 24 are respectively disposed outside the driving rods 23; the second driving unit 21 is composed of a plurality of second driving springs 25, and the number of the second driving springs 25 is greater than the number of the first driving springs 24;
the driving rod 23 comprises a first rod 2301 connected to the first driving seat 18, and a second rod 2302 connected to the driving piston 15, wherein a cavity is formed inside the first rod 2301, and the second rod 2302 extends into the first rod 2301; fig. 5 is an internal schematic view of a first rod according to an embodiment of the present invention, and as shown in fig. 5, a fourth check valve 26 and a fifth check valve 27 are disposed in the first rod 2301, wherein the fourth check valve 26 is used for conducting the outside of the first rod to the inside of the first rod when the driving gear is driven by the driving shaft to move, and the fifth check valve 27 is used for conducting the inside of the first rod to the outside of the first rod when the second rod compresses the cavity of the first rod;
a plurality of third driving springs 28 are further disposed in the driving chamber 14, and each third driving spring 28 comprises a fixed end 2801 and a supporting end 2802, wherein the fixed end 2801 is fixed on the first driving seat 18, and the supporting end 2802 and the driving piston 15 are opposite to each other; in the case where the driving gear 5 is driven to move by the driving shaft, a non-contact structure is formed between the supporting end 2802 and the driving piston 15.
In an alternative embodiment, fig. 6 is a schematic internal view of a drive piston provided according to an embodiment of the present invention, as shown in fig. 6, a reservoir chamber 29 is provided in the drive piston 15, the reservoir chamber 29 extends to a position above an end surface of the drive piston 15 on a side opposite to the first drive pipe 16, and the third check valve 22 is provided on an inner wall of the reservoir chamber 29 and an end surface of the drive piston 15 on a side opposite to the second drive pipe 17;
the liquid storage chamber 29 includes a liquid inlet portion 2901 and a liquid storage portion 2902, wherein the liquid inlet portion 2901 is conducted to the end surface of the driving piston 15; the width of any position of the liquid storing portion 2902 is larger than the width of the liquid inlet portion 2901, and at least a part of the liquid storing portion 2902 is located between the liquid inlet portion 2901 and the side wall of the driving piston 15.
It should be further noted that, the design of the liquid storage chamber may accumulate a corresponding amount of hydraulic oil inside the driving piston, and the hydraulic oil inside the liquid storage chamber may be concentrated at a position corresponding to the third check valve in the driving piston compared with the hydraulic oil outside the driving piston, so that the liquid storage chamber may ensure that the hydraulic oil in the liquid storage chamber may enter the other side of the driving piston through the third check valve under the inertia effect during the reciprocating motion of the driving piston, thereby further ensuring the source of the hydraulic oil at one side of the boosting chamber during the reciprocating motion of the driving piston, and further ensuring the output hydraulic pressure of the boosting chamber.
The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (4)
1. A steering hydraulic pump suitable for heavy-duty vehicle emergency conditions, comprising: the pump comprises a pump body, wherein an inner cavity is formed in the pump body, and a liquid inlet and a liquid outlet which are communicated with the inner cavity are also formed in the pump body; a diversion cavity is arranged in the inner cavity, a driving gear and a driven gear which are meshed with each other are arranged in the diversion cavity, the driving gear is driven to rotate through an external driving shaft, and the inner cavity is also provided with a liquid inlet cavity and a liquid outlet cavity, wherein the liquid inlet cavity is formed between the liquid inlet and the diversion cavity, and the liquid outlet cavity is formed between the liquid outlet and the diversion cavity; still be provided with booster unit among the pump body, booster unit includes:
the liquid inlet cavity is communicated with the liquid outlet cavity through a liquid inlet pipeline, a first one-way valve is arranged in the liquid inlet pipeline and used for communicating the liquid inlet cavity with the liquid outlet cavity, a liquid outlet pipeline is arranged between the boosting cavity and the liquid outlet cavity, and a second one-way valve is arranged in the liquid outlet pipeline and used for communicating the boosting cavity with the liquid outlet cavity;
the driving cavity is internally provided with a driving piston, a first driving pipeline communicated to the liquid outlet cavity and a second driving pipeline communicated to the boosting cavity are arranged in the driving cavity, and the driving piston is arranged between the first driving pipeline and the second driving pipeline; the driving cavity is also internally provided with a first driving seat and a second driving seat, the first driving seat is arranged on the inner wall of the driving cavity at one side of the first driving pipeline, and the second driving seat is arranged on the inner wall of the driving cavity at one side of the second driving pipeline; a first driving unit is arranged between the driving piston and the first driving seat, and a second driving unit is arranged between the driving piston and the second driving seat;
the first drive unit and the second drive unit are configured such that, in the case where the drive gear is driven to move by the drive shaft, the drive piston compresses the second drive unit under hydraulic pressure to close the second drive duct; and under the condition that the driving gear is not driven by the driving shaft to move, the driving piston enables the second driving pipeline to be opened under the driving of the second driving unit and compresses the first driving unit;
a third one-way valve is further arranged on the driving piston and used for conducting the first driving pipeline side to the second driving pipeline side;
the liquid inlet cavity is of a U-shaped structure, wherein the liquid inlet cavity comprises a first subchamber extending downwards from the liquid inlet and a second subchamber extending downwards from the flow guide cavity; the liquid outlet chamber extends downwards from the flow guide chamber; the boosting chamber and the driving chamber are both arranged between the second subchamber and the liquid outlet chamber, the driving chamber is positioned on the upper side of the boosting chamber, and the second driving pipeline extends between the driving chamber and the boosting chamber; the first driving pipeline comprises a bending part in a U-shaped structure, and the pipe diameter of the end part of the first driving pipeline, which is positioned on one side of the liquid outlet cavity, is smaller than that of the bending part.
2. The steering hydraulic pump for the emergency condition of the heavy-duty vehicle as claimed in claim 1, wherein said outlet pipe extends from said booster chamber to said outlet chamber in an inclined downward direction, and an axial direction of said outlet pipe intersects with an axial direction of said outlet port; the pipe diameter of the liquid outlet pipeline is gradually reduced from the power-assisted cavity to the liquid outlet cavity, and an internal thread structure is arranged on the inner wall of the liquid outlet pipeline.
3. The steering hydraulic pump for an emergency condition of a heavy-duty vehicle according to claim 1, wherein the first driving unit is formed of a plurality of driving levers and a plurality of first driving springs, the plurality of first driving springs correspond to the plurality of driving levers one to one, and the plurality of first driving springs are respectively disposed outside the driving levers; the second driving unit is composed of a plurality of second driving springs, and the number of the second driving springs is larger than that of the first driving springs;
the driving rod comprises a first rod connected to the first driving seat and a second rod connected to the driving piston, a cavity is formed in the first rod, and the second rod extends into the first rod; a fourth one-way valve and a fifth one-way valve are arranged in the first rod piece, wherein the fourth one-way valve is used for enabling the outside of the first rod piece to be communicated to the inside of the first rod piece under the condition that the driving gear is driven by the driving shaft to move, and the fifth one-way valve is used for enabling the inside of the first rod piece to be communicated to the outside of the first rod piece under the condition that the second rod piece compresses the cavity of the first rod piece;
a plurality of third driving springs are further arranged in the driving chamber and comprise fixed ends and supporting ends, wherein the fixed ends are fixed on the first driving seat, and the supporting ends and the driving piston are opposite to each other; under the condition that the driving gear is driven by the driving shaft to move, a non-contact structure is arranged between the supporting end and the driving piston.
4. A steering hydraulic pump for a heavy-duty vehicle as claimed in claim 1, wherein said drive piston is provided with a reservoir chamber therein, said reservoir chamber extending above an end surface of said drive piston on a side opposite to said first drive conduit, said third check valve being provided on an inner wall of said reservoir chamber and an end surface of said drive piston on a side opposite to said second drive conduit;
the liquid storage cavity comprises a liquid inlet part and a liquid storage part, wherein the liquid inlet part is communicated to the upper part of the end face of the driving piston;
the width of any position in the liquid storage part is larger than that of the liquid inlet part, and at least part of the liquid storage part is positioned between the liquid inlet part and the side wall of the driving piston.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010130739.XA CN111186483B (en) | 2020-02-28 | 2020-02-28 | Steering hydraulic pump suitable for heavy vehicle emergency working condition |
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| CN202010130739.XA CN111186483B (en) | 2020-02-28 | 2020-02-28 | Steering hydraulic pump suitable for heavy vehicle emergency working condition |
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| CN111186483A CN111186483A (en) | 2020-05-22 |
| CN111186483B true CN111186483B (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010130739.XA Active CN111186483B (en) | 2020-02-28 | 2020-02-28 | Steering hydraulic pump suitable for heavy vehicle emergency working condition |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425784A (en) * | 1971-10-01 | 1976-02-18 | Bendix Corp | Hydraulic booster |
| GB1597057A (en) * | 1977-05-04 | 1981-09-03 | Zahnradfabrik Friedrichshafen | Power-assisted steering systems for motor vehicles |
| CN2900287Y (en) * | 2006-05-09 | 2007-05-16 | 重庆大江工业(集团)有限责任公司 | Oil path distribution valve for automobile power steering |
| CN102099232A (en) * | 2008-06-26 | 2011-06-15 | 由美国环境保护署署长代表的美利坚合众国政府 | On-demand power brake system and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1497073A (en) * | 1974-05-21 | 1978-01-05 | Girling Ltd | Hydraulic booster for vehicle braking system |
| CN201280128Y (en) * | 2007-09-19 | 2009-07-29 | 德尔菲技术公司 | Vehicle hydraulic system |
| CN201280153Y (en) * | 2007-09-19 | 2009-07-29 | 德尔菲技术公司 | Vehicle hydraulic system with pressure release valve |
-
2020
- 2020-02-28 CN CN202010130739.XA patent/CN111186483B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425784A (en) * | 1971-10-01 | 1976-02-18 | Bendix Corp | Hydraulic booster |
| GB1597057A (en) * | 1977-05-04 | 1981-09-03 | Zahnradfabrik Friedrichshafen | Power-assisted steering systems for motor vehicles |
| CN2900287Y (en) * | 2006-05-09 | 2007-05-16 | 重庆大江工业(集团)有限责任公司 | Oil path distribution valve for automobile power steering |
| CN102099232A (en) * | 2008-06-26 | 2011-06-15 | 由美国环境保护署署长代表的美利坚合众国政府 | On-demand power brake system and method |
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| Publication number | Publication date |
|---|---|
| CN111186483A (en) | 2020-05-22 |
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