CN214196800U - Hydraulic system capable of being adjusted in two directions - Google Patents

Abstract

The utility model provides a but hydraulic system of two way regulation, including the piston cylinder, first liquid pump and second liquid pump, piston chamber and back piston chamber before piston chamber is divided into with the piston chamber to the inside piston of piston cylinder, the inner of piston rod gets into and is connected with the piston in the past piston chamber, preceding piston chamber intercommunication sets up first check valve, back piston chamber intercommunication sets up the second check valve, the entry of first check valve of first liquid pump intercommunication and the export of second check valve, the export of first check valve of second liquid pump intercommunication and the entry of second check valve. The utility model discloses a shrink of first plunger control piston pole, the extension of the outside actuating mechanism control piston pole of second plunger cooperation can adjust the position of piston rod in a flexible way, has infinitely variable control's characteristics, and whole hydraulic system reasonable in design need not adopt the switching-over valve, and operation control is convenient, and piston rod can be maintained in the position of adjusting through hydraulic pressure force, use reliably.

Description

Hydraulic system capable of being adjusted in two directions

Technical Field

The utility model relates to a hydraulic pressure technical field, in particular to but hydraulic system of two-way regulation.

Background

A pedal is generally disposed at the bottom end of a cab of rail transit, a vehicle, or the like, and a driver operates the pedal by touching the pedal. The bottom end of a cab of rail transit or a vehicle is usually narrow, so that feet of a driver are easy to fatigue when the driver drives for a long time, and the comfortable pedal heights of different drivers are different due to the height and the like. Different drivers can reduce the fatigue of feet when driving for a long time by changing the height of the pedal to the position where the driver feels comfortable, or the same driver can adjust the height of the pedal, so that the posture of the feet is adjusted, and the aim of relaxing is fulfilled.

The height of the pedal in the prior art is usually adjusted in an electrically driven mode, the structure control of the electrically driven pedal is complex, the use cost is high, meanwhile, the pedal is easy to lose efficacy in a humid environment, and the maintenance after the pedal loses efficacy is complex. Patent CN111634298A discloses a purely mechanical pedal, which is stabilized after adjustment by a spherical lock body between a lock seat, a lock disc and a lock cover. However, the adjusted position of the pedal is determined by the first taper holes distributed in the annular array, and stepless adjustment cannot be performed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a but hydraulic system of two-way regulation, can be applied to the footboard device and conveniently carry out stepless lift adjustment.

In order to achieve the purpose, the utility model provides a hydraulic system capable of being adjusted in two directions, including piston cylinder, first liquid pump and second liquid pump, piston cavity is divided into preceding piston cavity and back piston cavity with the piston of piston cylinder inside, the inner of piston rod gets into and is connected with the piston from preceding piston cavity, preceding piston cavity intercommunication sets up first check valve, back piston cavity intercommunication sets up the second check valve, the entry of first check valve and the export of second check valve are communicated to the first liquid pump, the export of second check valve and the entry of second check valve are communicated to the second liquid pump; the first liquid pump is a one-way liquid pump, the flow direction is that the outlet of the second one-way valve arrives at the inlet of the first one-way valve, a first pump cavity is arranged in the first liquid pump, a movable first plunger is arranged in the first pump cavity, the outer end of the first plunger passes through a spring and is elastically connected with the first pump cavity, the second liquid pump is a one-way liquid pump, the flow direction is that the outlet of the first one-way valve arrives at the inlet of the second one-way valve, a second pump cavity is arranged in the second liquid pump, a movable second plunger is arranged in the second pump cavity, the outer end of the second plunger passes through a spring and is elastically connected with the second pump cavity, a plunger head is further arranged in the second liquid pump, the plunger head passes through a spring and is elastically connected with the opening and closing opening of the second pump cavity, and the second plunger head corresponds to the opening and closing opening.

And the energy storage hydraulic cylinder is communicated with an outlet of the second one-way valve, an energy storage piston inside the energy storage hydraulic cylinder is connected with an energy storage spring, and the other end of the energy storage spring is connected with the inner side wall of the energy storage hydraulic cylinder.

Furthermore, a channel is arranged inside the piston rod, the first one-way valve is communicated with the front piston cavity through the channel, and the second one-way valve is directly communicated with the rear piston cavity.

The above technical scheme of the utility model has following beneficial effect:

the utility model provides a but hydraulic system of two-way regulation, through the shrink of first plunger control piston pole, the extension of the outside actuating mechanism control piston pole of second plunger cooperation can adjust the position of piston rod in a flexible way, has infinitely variable control's characteristics, and whole hydraulic system reasonable in design need not adopt the switching-over valve, and operation control is convenient, and piston rod can be maintained in the position of adjusting through hydraulic pressure force, use reliably.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of a first liquid pump according to the present invention;

fig. 3 is a schematic structural view of a second fluid pump of the present invention.

[ description of reference ]

1-a piston cylinder; 2-a piston; 3-front piston cavity; 4-rear piston cavity; 5-a piston rod; 6-a first one-way valve; 7-a second one-way valve; 8-a first liquid pump; 9-a second liquid pump; 10-a first pump chamber; 11-a first plunger; 12-a second pump chamber; 13-a second plunger; 14-a plug head; 15-energy storage hydraulic cylinder; 16-an energy storage piston; 17-energy storage spring.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the embodiment of the utility model provides a but hydraulic system of two-way regulation, including piston cylinder 1, piston 2 inside piston cylinder 1 divide into preceding piston chamber 3 and back piston chamber 4 with the piston chamber, the inner of piston rod 5 gets into and is connected with piston 2 from preceding piston chamber 3, preceding piston chamber 3 intercommunication sets up first check valve 6, back piston chamber 4 intercommunication sets up second check valve 7, the entry of first check valve 6 of first liquid pump 8 intercommunication and the export of second check valve 7, the export of second liquid pump 9 intercommunication first check valve 6 and the entry of second check valve 7.

Meanwhile, as shown in fig. 2, the first liquid pump 8 is a one-way liquid pump, and the flow direction is from the outlet of the second one-way valve 7 to the inlet of the first one-way valve 6, a first pump chamber 10 is arranged in the first liquid pump 8, a movable first plunger 11 is arranged in the first pump chamber 10, and the outer end of the first plunger 11 is elastically connected with the first pump chamber 10 through a spring.

Meanwhile, as shown in fig. 3, the second liquid pump 9 is also a one-way liquid pump, and the flow direction is from the outlet of the first one-way valve 6 to the inlet of the second one-way valve 7, a second pump chamber 12 is arranged in the second liquid pump 9, a movable second plunger 13 is arranged in the second pump chamber 12, and the outer end of the second plunger 13 is elastically connected with the second pump chamber 12 through a spring. In addition, a plug 14 is arranged in the second liquid pump 9, the plug 14 is elastically connected with the opening and closing opening of the second pump chamber 12 through a spring, the opening and closing opening is blocked by the plug 14 under the action of the spring in a normal state, and the second plug 13 in the second pump chamber 12 is aligned with the plug 14.

In the initial state, the piston 2 is located at the foremost end of the piston chamber, at which time the volume of the front piston chamber 3 is minimum, the piston rod 5 has the maximum extension, and the system is filled with a pressure-transmitting liquid, in this embodiment, oil. The first plunger 11 is driven by an external force to move toward the inside of the first pump chamber 10, and the oil is delivered to the first check valve 6 in the process of reducing the volume of the first pump chamber 10 and increasing the pressure, and is not delivered to the second check valve 7 due to the one-way property of the first liquid pump 8 itself. Although the first check valve 6 is communicated with the second pump 9 and the direction is correct, the plug 14 in the second pump chamber 12 blocks the whole passage, and the hydraulic pressure cannot overcome the spring force to push the plug open, so that the oil in the first check valve 6 cannot flow into the second pump chamber 12 and all flows into the front piston chamber 3 to push the piston 2 to move backwards, so that the piston 2 drives the piston rod 5 to contract while the front piston chamber 3 is enlarged, and the hydraulic pressure is transmitted to the actuating mechanism through the piston rod 5. In the process, the oil in the rear piston cavity 4 enters the first pump cavity 10 from the second check valve 7, which is equivalent to the process of conveying the oil in the rear piston cavity 4 to the front piston cavity 3. In the initial position, the hydraulic forces are balanced, and during the process of driving the first plunger 11, the balance of the liquid is maintained after the liquid is re-flowed and stabilized, and the piston 2 is maintained at the new position. The first plunger 11 can be maintained at a new position by the internal hydraulic pressure and the external pneumatic pressure.

Correspondingly, when the second plunger 13 is driven by an external force to move along the inside of the second pump chamber 12, the second plunger 13 can push the plunger head 14 open, thereby opening the inside of the second pump chamber 12. At the moment, the actuating mechanism is gradually restored to the initial position under the action of gravity and the like, the piston 2 moves forwards, the volume of the front piston cavity 3 is reduced, oil enters the second pump cavity 12 from the first check valve 6 and then returns to the rear piston cavity 4, and in addition, part of the oil in the rear piston cavity 4 enters the first pump cavity 10 again to enable the first plunger 11 to be reset.

When the hydraulic system is applied to a pedal and other devices, the outer end of the first plunger 11 can be connected with the bottom end of the lifting pedal, and the outer end of the second plunger 13 can be connected with the bottom end of the lowering pedal. The first plunger 11 is driven by the downward stepping pedal to move towards the inside of the first pump cavity 10, so that the piston rod 5 is contracted, the pedal is driven by the corresponding actuating mechanism to rise, the downward stepping position of the pedal corresponds to each height position of the pedal, the downward stepping degree of the driver is directly related to the lifting height of the pedal, and the pedal position can be steplessly increased. The step-down pedal controls the pedal to descend, and as long as the step-down pedal is stepped on, the pedal can continuously descend under the action of gravity, so that the execution structure and the piston rod 5 are gradually restored to the initial position. After the step-down pedal is released, the plug 14 blocks the second pump chamber 12 again under the action of the spring, the oil cannot continuously circulate, the pedal is maintained at a new position, the second plunger 13 is reset under the action of the spring (the influence on the volume of the second pump chamber is small), and the step-down pedal directly restores to the initial position. Therefore, the pedal can be continuously lowered as long as the driver steps on the lowering pedal, and the effect of steplessly lowering the position of the pedal is achieved.

Therefore, the two-way adjustable hydraulic structure provided by the embodiment controls the contraction of the piston rod 5 through the first plunger 11, the second plunger 13 is matched with the external actuating mechanism to control the extension of the piston rod 5, the position of the piston rod 5 can be flexibly adjusted, the two-way adjustable hydraulic structure has the characteristic of stepless adjustment, the whole hydraulic system is reasonable in design, a reversing valve is not needed, the operation and the control are convenient, the piston 2 and the piston rod 5 can be maintained at the adjusted position through hydraulic pressure, and the use is reliable.

As a further improvement, the hydraulic system provided by the embodiment further includes an energy storage hydraulic cylinder 15, and the energy storage hydraulic cylinder 15 is communicated with the outlet of the second check valve 7. The energy storage piston 16 inside the energy storage hydraulic cylinder 15 is connected with an energy storage spring 17, the other end of the energy storage spring 17 is connected with the inner side wall of the energy storage hydraulic cylinder 15, the front end of the energy storage piston 16 is an oil liquid storage position, and the rear end of the energy storage piston is a cavity only provided with the energy storage spring 17. In the process that the piston rod 5 extends out and the front piston cavity is reduced, oil in the front piston cavity 3 enters the rear piston cavity 4 and also enters the energy storage hydraulic cylinder 15, so that the energy storage piston 16 moves backwards and compresses the energy storage spring 17, and elastic potential energy is stored; when the first plunger 11 is driven to move towards the interior of the first pump chamber 10, the energy storage piston 16 can move forwards under the action of the energy storage spring 17, so that the oil liquid at the second check valve 7 is more smoothly pressed into the front piston chamber 3, and the oil liquid and the front piston chamber cooperate to further improve the hydraulic pressure, thereby ensuring the smooth execution of the actuating mechanism. In addition, the energy storage hydraulic cylinder 15 can also adjust the pretightening force of the whole hydraulic system during installation, and the specification of the energy storage spring 17 and the position of the energy storage piston 16 are set in the initial state, so that the tightness and the sensitivity of the plunger piston structure can be controlled.

In this embodiment, the piston rod 5 is internally provided with a passage through which the first check valve 6 communicates with the front piston chamber 3, while the second check valve 7 communicates directly with the rear piston chamber 4.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. A hydraulic system capable of being adjusted in two directions is characterized by comprising a piston cylinder, a first liquid pump and a second liquid pump, wherein a piston in the piston cylinder divides a piston cavity into a front piston cavity and a rear piston cavity, the inner end of a piston rod enters from the front piston cavity and is connected with the piston, the front piston cavity is communicated with and provided with a first one-way valve, the rear piston cavity is communicated with and provided with a second one-way valve, the first liquid pump is communicated with an inlet of the first one-way valve and an outlet of the second one-way valve, and the second liquid pump is communicated with an outlet of the first one-way valve and an inlet of the second one-way valve; the first liquid pump is a one-way liquid pump, the flow direction is that the outlet of the second one-way valve arrives at the inlet of the first one-way valve, a first pump cavity is arranged in the first liquid pump, a movable first plunger is arranged in the first pump cavity, the outer end of the first plunger passes through a spring and is elastically connected with the first pump cavity, the second liquid pump is a one-way liquid pump, the flow direction is that the outlet of the first one-way valve arrives at the inlet of the second one-way valve, a second pump cavity is arranged in the second liquid pump, a movable second plunger is arranged in the second pump cavity, the outer end of the second plunger passes through a spring and is elastically connected with the second pump cavity, a plunger head is further arranged in the second liquid pump, the plunger head passes through a spring and is elastically connected with the opening and closing opening of the second pump cavity, and the second plunger head corresponds to the opening and closing opening.

2. The hydraulic system with bidirectional adjustment of claim 1, further comprising an energy storage cylinder, wherein the energy storage cylinder is communicated with the outlet of the second one-way valve, an energy storage piston inside the energy storage cylinder is connected with an energy storage spring, and the other end of the energy storage spring is connected with the inner side wall of the energy storage cylinder.

3. The bidirectionally adjustable hydraulic system of claim 1, wherein said piston rod has a passage disposed therein, said first one-way valve communicating with said front piston chamber through said passage, said second one-way valve communicating directly with said rear piston chamber.

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