CN214607753U - Cab lifting hydraulic driving system and working vehicle - Google Patents
Cab lifting hydraulic driving system and working vehicle Download PDFInfo
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- CN214607753U CN214607753U CN202120232135.6U CN202120232135U CN214607753U CN 214607753 U CN214607753 U CN 214607753U CN 202120232135 U CN202120232135 U CN 202120232135U CN 214607753 U CN214607753 U CN 214607753U
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Abstract
The utility model relates to a hydraulic pressure technical field provides a driver's cabin lift hydraulic drive system and working vehicle, and driver's cabin lift hydraulic drive system includes: the hydraulic pump is connected with an oil tank; the lifting reversing valve is respectively connected with the hydraulic pump and the oil tank and is used for controlling the lifting of the cab; the first balance valve and the second balance valve are respectively connected with the lifting reversing valve; and the rod cavity of the lifting oil cylinder is connected with the first balance valve, and the rodless cavity of the lifting oil cylinder is connected with the second balance valve. Through the utility model discloses hydraulic drive system has avoided hydraulic element sealing performance poor and has leaded to the problem that driver's cabin position can't keep, and the driver's cabin can be in any lifting position locking.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field especially relates to a driver's cabin lift hydraulic drive system and working vehicle.
Background
The cab of a working vehicle, including a crane, an excavator, and other working machines, is controlled to be lifted by a hydraulic drive system, and the hydraulic drive system needs to ensure that the cab can be locked at any position. The existing cab has the problems that the designated position cannot be kept when the cab is lifted, the leakage amount of a hydraulic driving system is large, the element selection is unreasonable and the like, and potential safety hazards exist when the cab is lifted.
SUMMERY OF THE UTILITY MODEL
The utility model provides a driver's cabin lift hydraulic drive system and working vehicle, through the utility model discloses hydraulic drive system has avoided hydraulic element sealing performance poor and has leaded to the problem that the driver's cabin position can't keep, and the driver's cabin can be in any lift position locking.
The utility model provides a driver's cabin lift hydraulic drive system, include: the hydraulic pump is connected with an oil tank; the lifting reversing valve is respectively connected with the hydraulic pump and the oil tank and is used for controlling the lifting of the cab; the first balance valve and the second balance valve are respectively connected with the lifting reversing valve; and the rod cavity of the lifting oil cylinder is connected with the first balance valve, and the rodless cavity of the lifting oil cylinder is connected with the second balance valve.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system still includes the electromagnetism ball valve, the first end of electromagnetism ball valve with lift cylinder's rodless chamber links to each other, the second end of electromagnetism ball valve with the oil tank links to each other.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system, the electromagnetism ball valve set up in the driver's cabin.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system still includes the high pressure stop valve, the high pressure stop valve with the electromagnetism ball valve is parallelly connected.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system, the lift switching-over valve with be equipped with the choke valve between the oil tank, just the choke valve set up in the electromagnetism ball valve with between the oil tank.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system, the choke valve is adjustable throttle valve.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system, first balanced valve is outer accuse formula balanced valve, the second balanced valve is interior accuse formula balanced valve.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system, the hydraulic pump with be equipped with the overflow valve between the lift switching-over valve, the overflow valve with the oil tank links to each other.
According to the utility model provides a pair of driver's cabin lift hydraulic drive system, the switching-over valve that goes up and down is tribit four-way switching-over valve.
The utility model also provides an operating vehicle, include driver's cabin lift hydraulic drive system.
The cab lifting hydraulic driving system and the working vehicle provided by the utility model can realize the locking and keeping of the cab at any lifting position through the first balance valve and the second balance valve; in addition, when the hydraulic component bursts or seriously leaks, the first balance valve and the second balance valve can avoid the phenomenon of out of control of the cab, and the safety of operators is guaranteed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a cab lifting hydraulic drive system provided by the present invention;
reference numerals:
1: a hydraulic pump; 2: a lift diverter valve; 3: a second balancing valve;
4: a lift cylinder; 5: a first counter-balance valve; 6: a throttle valve;
7: an overflow valve; 8: an electromagnetic ball valve; 9: a high pressure stop valve;
10: and an oil tank.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The cab lift hydraulic drive system of the present invention is described below with reference to fig. 1.
As shown in figure 1, the utility model discloses driver's cabin lift hydraulic drive system mainly includes hydraulic pump 1, lift switching-over valve 2, first balanced valve 5, second balanced valve 3 and lift cylinder 4.
The hydraulic pump 1 is connected with an oil tank 10, the hydraulic pump 1 is a power element of a hydraulic system, and is driven by an engine or an electric motor, oil is sucked from the oil tank 10 to form pressure oil, and the pressure oil is discharged and sent to an element of an actuating element, and in the embodiment, the hydraulic pump 1 sends the pressure oil to the lifting reversing valve 2. The hydraulic pump can be divided into a gear pump, a plunger pump, a vane pump, a screw pump and the like according to the structure, and the utility model discloses do not do special restriction.
The lifting reversing valve 2 is respectively connected with the hydraulic pump 1 and the oil tank 10 and is used for controlling the lifting of the cab.
It can be understood that the reversing valve is a directional control valve with more than two flow forms and more than two oil ports, is a valve for realizing the circulation, the cut-off and the reversing of hydraulic oil, the pressure unloading and the sequential action control, is a directional control valve depending on the relative movement of the valve core and the valve body, and is divided into two-position, three-position and the like according to the number of the working positions of the valve core staying in the valve body, and is divided into two-way, three-way, four-way, six-way and the like according to the number of the oil passages of the valve core connected with the valve body.
In this embodiment, the lifting/lowering direction changing valve 2 is preferably a three-position four-way direction changing valve, the pressure port P of the lifting/lowering direction changing valve 2 is connected to the hydraulic pump 1, and the oil return port T of the lifting/lowering direction changing valve 2 is connected to the oil tank 10.
The first balance valve 5 is connected with a working port A of the lifting reversing valve 2, and the second balance valve 3 is connected with a working port B of the lifting reversing valve 2. The balance valve has a load holding function and good sealing performance, so that the cab can be locked and held at any position; in addition, when the hydraulic component bursts or seriously leaks, the balance valve can avoid the phenomenon of out-of-control of the cab.
The rod cavity of the lift cylinder 4 is connected with the first balance valve 5, and the rodless cavity of the lift cylinder 4 is connected with the second balance valve 3.
The utility model discloses hydraulic drive system's working process includes: when the cab ascends, the electromagnetic valve core is electrified at the right position, the pressure port P is communicated with the working port B, the working port A is communicated with the oil return port T, and pressure oil flows through the pressure port P and the working port B of the lifting reversing valve 2 from the hydraulic pump 1 and then enters a rodless cavity of the lifting oil cylinder 4 through the second balance valve 3; the hydraulic oil in the rod cavity of the lifting oil cylinder 4 flows through the first balance valve 5, then flows through the working port A and the oil return port T of the lifting reversing valve 2, and finally flows back to the oil tank 10, so that the stable operation performance of the executing mechanism is ensured, and the energy consumption is reduced.
When the cab descends, the electromagnetic valve core is electrified at the left position, the pressure port P is communicated with the working port A, the working port B is communicated with the oil return port T, and pressure oil flows through the pressure port P and the working port A of the lifting reversing valve 2 from the hydraulic pump 1 and then enters a rod cavity of the lifting oil cylinder 4 through the first balance valve 5; hydraulic oil in a rodless cavity of the lifting oil cylinder 4 flows through the second balance valve 3, then flows through the working port B and the oil return port T of the lifting reversing valve 2, and finally flows back to the oil tank 10; the process ensures the stability and safety of the actuating mechanism.
The utility model discloses the setting can be selected according to actual demand to the specific kind of first balanced valve 5 and second balanced valve 3, for example first balanced valve 5 and second balanced valve 3 all can be respectively outer accuse formula balanced valve and interior accuse formula balanced valve, when first balanced valve 5 and second balanced valve 3 combination application promptly, can be for outer accuse and outer accuse, interior accuse and outer accuse and interior accuse grade compound mode.
In this embodiment, the utility model discloses preferred external control and interior accuse compound mode, specific: the first counter-balance valve 5 is preferably an externally controlled counter-balance valve and the second counter-balance valve 3 is preferably an internally controlled counter-balance valve. In order to lock the cab at any position, an internal control type balance valve is required to seal the oil in the rodless cavity of the lift cylinder 4 under a certain pressure, and an external control type balance valve is required to seal the oil in the rod cavity of the lift cylinder 4 under a certain pressure.
It can be understood that the rod cavity of the lift cylinder 4 uses an external control type balance valve, and oil in the rod cavity can be sealed under a set pressure, so that a cab is prevented from shaking when the working vehicle runs or works; moreover, the utility model uses the external control type balance valve, which can reduce the energy consumption when the rod cavity of the lifting oil cylinder 4 returns oil; the rodless cavity of the lifting oil cylinder 4 uses an internal control type balance valve, so that oil in the rodless cavity can be sealed under set pressure, and the cab can be kept in a locking position; and the utility model discloses because of the use is interior accuse formula balanced valve, because valve member attribute reason itself, though the energy consumption is higher, nevertheless improved the leakproofness, and then improved the stationarity that the executive component moved (the driver's cabin descends), the security performance promotes.
According to the embodiment of the present invention, in some examples, when the load on the cab is large, the internal pressure of the lift cylinder 4 increases suddenly, and in order to prevent the damage of the hydraulic component or the control failure of the hydraulic system, the internal control type balance valve allows the oil in the rodless cavity of the lift cylinder 4 to return, so that the cab descends slowly; and when the cab is in a lifting posture, walks or works, the shaking of the cab can be avoided by the external control type balance valve arranged at the rod cavity of the lifting oil cylinder 4.
As further improvement, the utility model discloses hydraulic drive system still includes electromagnetic ball valve 8, and it is connected with electromagnetic ball valve 8 still to bypass on the oil circuit of the rodless chamber department of lift cylinder 4, and electromagnetic ball valve 8 links to each other with oil tank 10, and under the normal operating condition, electromagnetic ball valve 8 does not switch on, and when hydraulic drive system trouble, operatable electromagnetic ball valve 8, under the effect of driver's cabin dead weight, hydraulic oil flows back to oil tank 10 through electromagnetic ball valve 8's right position oil circuit, guarantees operation personnel's safety.
The electromagnetic ball valve is an electromagnetic reversing valve which uses the thrust of an electromagnet as driving force to push a steel ball to realize the on-off of an oil way, the embodiment is preferably a two-position two-way electromagnetic ball valve, and the electromagnetic ball valve 8 is arranged in a cab, so that the operation of a driver is facilitated.
According to the embodiment of the utility model, the utility model discloses hydraulic drive system still is provided with high-pressure stop valve 9, and high-pressure stop valve 9 is installed on work vehicle's platform, and high-pressure stop valve 9 connects in parallel with electromagnetism ball valve 8, and high-pressure stop valve 9 is in with electromagnetism ball valve 8 the utility model provides an application principle is the same, and under the normal operating condition, high-pressure stop valve 9 does not switch on, when hydraulic drive system trouble, equally can be through adjusting high-pressure stop valve 9, under the effect of driver's cabin dead weight, hydraulic oil flows back to the oil tank through high-pressure stop valve 9, guarantees operation personnel's safety.
It can be understood that, when the hydraulic drive system is in failure, the electromagnetic ball valve 8 is arranged in the cab, so that the driver operates the electromagnetic ball valve 8 preferentially, and when the electromagnetic ball valve 8 is also in failure, the high-pressure stop valve 9 is operated. The utility model discloses a set up the dual guarantee of electromagnetism ball valve 8 and high pressure stop valve 9, when hydraulic drive system trouble, driver's cabin accessible electromagnetism ball valve 8 or high pressure stop valve 9 realize descending and reset.
In addition, the electromagnetic ball valve 8 and the high-pressure stop valve 9 have good sealing performance, good sealing of the rodless cavity oil of the lifting oil cylinder 4 can be guaranteed, hydraulic elements cannot be connected due to the fact that an internal control type balance valve is in bypass connection, the sealing performance of the rodless cavity oil of the lifting oil cylinder 4 is reduced, and therefore the cab can be locked at any position.
Therefore, based on the above-mentioned embodiment, the utility model discloses a set up interior accuse formula balanced valve, outer accuse formula balanced valve, electromagnetic ball valve 8 and high pressure stop valve 9, guaranteed the good sealing performance of lift cylinder 4, make the driver's cabin can lock and keep in any position.
Be equipped with choke valve 6 between lift switching-over valve 2's oil return opening T and oil tank 10, choke valve 6 is through changing throttle cross-section or throttle length with the valve of control fluid flow, the utility model discloses the preferred adjustable throttle valve that is of choke valve 6, and adjustable throttle valve sets up between electromagnetic ball valve 8 and oil tank 10, and when hydraulic drive system trouble, electromagnetic ball valve 8 or high pressure stop valve 9 use with the cooperation of adjustable throttle valve, can reset according to the speed of setting under the effect of driver's cabin dead weight.
In a specific example, an overflow valve 7 is further arranged between the hydraulic pump 1 and the pressure port P of the lifting reversing valve 2, and the overflow valve 7 is connected with an oil tank 10 to limit the pressure of a cab lifting hydraulic control system, ensure that hydraulic elements all work within a use pressure range, and play a role in safety protection.
The utility model also provides a work vehicle, work vehicle's specific type is unrestricted, for example can be operation machinery such as hoist, excavator, including the driver's cabin lift hydraulic drive system of above-mentioned embodiment, work vehicle's driver's cabin when going up and down, can lock and keep in any position, and the security performance is high.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A cab lift hydraulic drive system, comprising:
the hydraulic pump is connected with an oil tank;
the lifting reversing valve is respectively connected with the hydraulic pump and the oil tank and is used for controlling the lifting of the cab;
the first balance valve and the second balance valve are respectively connected with the lifting reversing valve;
and the rod cavity of the lifting oil cylinder is connected with the first balance valve, and the rodless cavity of the lifting oil cylinder is connected with the second balance valve.
2. The cab lift hydraulic drive system of claim 1, further comprising an electromagnetic ball valve, a first end of said electromagnetic ball valve being connected to said rodless cavity of said lift cylinder, and a second end of said electromagnetic ball valve being connected to said fuel tank.
3. The cab lift hydraulic drive system of claim 2, wherein said electromagnetic ball valve is disposed within said cab.
4. The cab lift hydraulic drive system of claim 2, further comprising a high pressure shut-off valve in parallel with the electromagnetic ball valve.
5. The cab lift hydraulic drive system of claim 2, wherein a throttle valve is disposed between the lift reversal valve and the oil tank, and the throttle valve is disposed between the electromagnetic ball valve and the oil tank.
6. The cab lift hydraulic drive system of claim 5, wherein the throttle valve is an adjustable throttle valve.
7. The cab lift hydraulic drive system of claim 1, wherein the first counterbalance valve is an externally controlled counterbalance valve and the second counterbalance valve is an internally controlled counterbalance valve.
8. The cab lift hydraulic drive system of claim 1, wherein an overflow valve is provided between the hydraulic pump and the lift directional valve, the overflow valve being connected to the oil tank.
9. The cab lift hydraulic drive system of claim 1, wherein the lift reversing valve is a three-position, four-way reversing valve.
10. A work vehicle comprising a cab lift hydraulic drive system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232135.6U CN214607753U (en) | 2021-01-26 | 2021-01-26 | Cab lifting hydraulic driving system and working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232135.6U CN214607753U (en) | 2021-01-26 | 2021-01-26 | Cab lifting hydraulic driving system and working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214607753U true CN214607753U (en) | 2021-11-05 |
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ID=78437614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120232135.6U Active CN214607753U (en) | 2021-01-26 | 2021-01-26 | Cab lifting hydraulic driving system and working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214607753U (en) |
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2021
- 2021-01-26 CN CN202120232135.6U patent/CN214607753U/en active Active
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