CN210795619U - Jack hydraulic system suitable for heavy load - Google Patents
Jack hydraulic system suitable for heavy load Download PDFInfo
- Publication number
- CN210795619U CN210795619U CN201921064837.7U CN201921064837U CN210795619U CN 210795619 U CN210795619 U CN 210795619U CN 201921064837 U CN201921064837 U CN 201921064837U CN 210795619 U CN210795619 U CN 210795619U
- Authority
- CN
- China
- Prior art keywords
- oil
- piston
- check valve
- small cylinder
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a jack hydraulic system suitable for heavy-duty, including handle, little jar, first check valve, second check valve, third check valve, oil tank and vat, be equipped with the piston in the little jar, epicoele and cavity of resorption are separated into with little jar inner chamber to the piston, the piston rod with the epicoele that the piston links to each other and passes little jar links to each other with the handle, on little jar piston was located to first check valve, little jar cavity of resorption links to each other with the oil tank through the second check valve on the first oil circuit, little jar cavity of resorption links to each other with the oil inlet of vat through the third check valve on the second oil circuit, the oil-out of vat links to each other with little jar epicoele oil inlet through third oil circuit main road directly, the oil inlet of first check valve is linked together with the epicoele of little jar, and the oil-out of first check valve is linked together with the. The utility model discloses an install the two acting cylinders of check valve on the piston, make hydraulic jack use manpower sparingly greatly when heavy load occasion promotes the object to the required oil tank of system is little than traditional hydraulic jack.
Description
Technical Field
The utility model relates to a hydraulic control system of jack especially relates to a jack hydraulic system that heavy load occasion promoted object.
Background
The hydraulic jack has compact structure, stable work and self-locking function, can be carried and operated by one person, is widely used in departments such as factories, mines, transportation and the like as tools for vehicle repair and other lifting, supporting and the like, and has labor-saving effect when lifting objects: area A of the small piston1Area A of large piston2The force acting on the small piston, i.e. the force F depressing the handle1The weight G of the object on the large piston, the relationship between the four is
Due to A1＜A2Therefore F is1<G so that the jack can lift a heavy object with a small force. The area ratio of the two pistons cannot be reduced without limit, and the design principle of a mechanical structure needs to be followed, so that the acting force required by pressing down the handle of the traditional hydraulic jack on a heavy-load occasion is still very large, and even the handle is difficult to press down, therefore, the purpose of realizing light operation on the heavy-load occasion is one of the problems to be solved by the hydraulic jack.
Disclosure of Invention
In order to solve the problem, the utility model provides a jack hydraulic system suitable for heavy load has solved traditional heavy load occasion and has pressed down the technical problem that the handle operation is light inadequately.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a jack hydraulic system suitable for heavy load comprises a handle, a small cylinder, a first one-way valve, a second one-way valve, a third one-way valve, an oil tank and a large cylinder, wherein a first piston is arranged in the small cylinder, the inner cavity of the small cylinder is divided into an upper cavity and a lower cavity by the first piston, a first piston rod is connected with the first piston and penetrates through the upper cavity of the small cylinder to be connected with the handle, the first one-way valve is arranged on the first piston and communicated with the upper cavity and the lower cavity of the small cylinder, the lower cavity of the small cylinder is connected with the oil tank through a first oil path provided with the second one-way valve, the lower cavity of the small cylinder is connected with an oil inlet of the large cylinder through a second oil path provided with the third one-way valve, an oil outlet of the large cylinder is directly connected with an oil inlet of the upper cavity of the small cylinder through a main path of the third oil path, an oil inlet of the first one-way valve is communicated with the upper, the heavy load is connected with the piston in the big cylinder through a second piston rod.
And the oil outlet of the large cylinder is connected with the oil tank through the third oil path branch.
Furthermore, one end of the handle is fixed, and the middle part of the handle is hinged with the top end of the piston rod of the small cylinder.
The utility model discloses with the two effect jars of installing the check valve on the little jar is changed into the piston by traditional single-acting jar, the system adopts the contrary differential connection mode of single piston rod pneumatic cylinder when pushing down the handle: the rod cavity of the small cylinder is filled with oil, and part of the oil output from the rodless cavity flows into the rod cavity of the small cylinder through the large cylinder, so that the acting force required for pressing down the handle is only the product of the area of the piston rod of the small cylinder and the pressure. The hydraulic jack can greatly save manpower particularly when lifting objects in heavy-load occasions, and an oil tank required by the system is smaller than that of the traditional hydraulic jack.
The utility model discloses advantage compared with the conventional art lies in:
(1) when the handle is lifted to enable the small cylinder to absorb oil, the second check valve is opened, oil in the oil tank is sucked into the lower cavity of the small cylinder, meanwhile, the first check valve is opened, the oil in the upper cavity of the small cylinder flows into the lower cavity, namely the oil in the upper cavity is also sucked into the lower cavity, and therefore the oil tank required by the system is smaller than that of a traditional hydraulic jack;
(2) the system adopts the inverse differential connection mode of a single-piston-rod hydraulic cylinder, the system pressure P and the small-cylinder piston rod area A3Satisfies the relationship:
the force required to depress the handle is therefore only that of a conventional hydraulic jack
Therefore, the hydraulic jack can greatly save manpower when lifting objects in heavy-load occasions.
Drawings
Fig. 1 is a schematic diagram of the hydraulic system of the jack hydraulic system in a normal state.
In the figure: 1. the hydraulic control system comprises a handle, 2, a small cylinder, 3, a first check valve, 4, a second check valve, 5, an oil tank, 6, a third check valve, 7, a stop valve, 8, a large cylinder, 9, a first oil path, 10, a second oil path, 11-1, a third oil path main path, 11-2 and a third oil path branch.
Detailed Description
The following describes the implementation of the present invention in detail with reference to specific embodiments.
As shown in fig. 1, a jack hydraulic system suitable for heavy load comprises a handle 1, a small cylinder 2, a first check valve 3, a second check valve 4, a third check valve 6, an oil tank 5 and a large cylinder 8, wherein a first piston is arranged in the small cylinder 2, the inner cavity of the small cylinder 2 is divided into an upper cavity and a lower cavity by the first piston, the first piston rod is connected with the first piston and penetrates through the upper cavity of the small cylinder to be connected with the handle 1, the first check valve 3 is arranged on the piston of the small cylinder, the lower cavity of the small cylinder is connected with the oil tank 5 through the second check valve 4 on a first oil path 9, the lower cavity of the small cylinder is connected with an oil inlet of the large cylinder 8 through the third check valve 6 on a second oil path 10, an oil outlet of the large cylinder 8 is directly connected with an oil inlet of the upper cavity of the small cylinder through a third oil path main path 11-1, the oil inlet of the first check valve 3 is communicated with the upper cavity of the small cylinder 2, the oil outlet of the first check, and a second piston is arranged in the large cylinder 8, and the heavy load is connected with the piston in the large cylinder 8 through a piston rod.
Furthermore, the hydraulic system further comprises a stop valve 7 and an oil tank 5, the stop valve 7 is arranged on the third oil path branch 11-2, and an oil outlet of the large cylinder 8 is connected with the oil tank 5 through the third oil path branch 11-2.
Further, the small cylinder 2 is a single-piston reverse differential rod, oil is input from an upper cavity of the small cylinder 2, namely a rod cavity, part of oil output from a lower cavity of the small cylinder 2, namely a rodless cavity, flows into the rod cavity of the small cylinder 2 through the large cylinder 8, the pressure of the rod cavity and the pressure of the rodless cavity of the small cylinder 2 are equal, and the acting force required for pressing down the handle 1 is only the product of the area of a piston rod of the small cylinder 2 and the pressure.
Further, one end of the handle 1 is fixed, and the middle part of the handle 1 is hinged with the top end of the piston rod of the small cylinder 2.
The working principle of the utility model is as follows:
when the handle 1 is lifted upwards to move the piston in the small cylinder 2 upwards, the lower cavity of the small cylinder 2 is vacuumized due to the increase of the volume, the one-way valve 4 is opened, and oil is sucked into the lower cavity of the small cylinder 2 from the oil tank 5 through the one-way valve 4 under the action of atmospheric pressure; meanwhile, the volume of the upper cavity of the small cylinder 2 is reduced, the pressure is increased, the one-way valve 3 is opened, and the oil in the upper cavity of the small cylinder 2 flows into the lower cavity through the one-way valve 3.
When the handle 1 is pressed to enable the piston of the small cylinder 2 to move downwards, the lower cavity of the small cylinder 2 is increased in pressure due to the reduction of the volume, the one-way valve 3 is closed, the one-way valve 4 is closed, and the one-way valve 6 is opened, so that oil which is just sucked is conveyed to the lower cavity of the large cylinder 8 through the one-way valve 6, the oil is compressed, the pressure is immediately increased, and when the pressure of the oil is increased to a pressure value which can overcome the pressure required by a load (a heavy object G) acting on the large cylinder 8, the heavy object G is simultaneously increased along with the downward pressing of the handle 1; meanwhile, part of oil in the large cylinder 8 directly flows into the rod cavity of the small cylinder 2 through the third oil path main path 11-1, the small cylinder 2 is in inverse differential connection of oil inlet of the rod cavity and liquid outlet of the rodless cavity at the moment, the pressure of the rod cavity is equal to that of the rodless cavity, and the difference of the action areas of the rod cavity and the rodless cavity is the area A of the piston rod of the small cylinder3System pressure P, small cylinder piston rod area A3Satisfies the relationship:
the force required to depress the handle 1 is therefore only the product of the area of the piston rod of the small cylinder 2 and the pressure, which is only that of a conventional hydraulic jack
Thereby the hydraulic jack of this scheme especially can use manpower sparingly greatly when heavy load occasion promotes the object.
After the object is lifted, the stop valve 7 is opened, the oil in the lower cavity of the large cylinder 8 flows back to the oil tank 5 through the third oil path branch 11-2 and the stop valve 7, and the heavy object G is put down from the lifted position.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The jack hydraulic system suitable for heavy load is characterized by comprising a handle (1), a small cylinder (2), a first one-way valve (3), a second one-way valve (4), a third one-way valve (6), an oil tank (5) and a large cylinder (8), wherein a first piston is arranged in the small cylinder (2), the inner cavity of the small cylinder (2) is divided into an upper cavity and a lower cavity by the first piston, a first piston rod is connected with the first piston and penetrates through the upper cavity of the small cylinder (2) to be connected with the handle (1), the first one-way valve (3) is arranged on the first piston and is communicated with the upper cavity and the lower cavity of the small cylinder (2), the lower cavity of the small cylinder (2) is connected with the oil tank (5) through a first oil path (9) provided with the second one-way valve (4), the lower cavity of the small cylinder (2) is connected with an oil inlet of the large cylinder (8) through a second oil path (10) provided with the third one-way valve (6), the oil outlet of the large cylinder (8) is directly connected with the oil inlet of the upper cavity of the small cylinder through a third oil path main path (11-1), the oil inlet of the first check valve (3) is communicated with the upper cavity of the small cylinder (2), the oil outlet of the first check valve (3) is communicated with the lower cavity of the small cylinder (2), a second piston is arranged in the large cylinder (8), and the heavy load is connected with the piston in the large cylinder (8) through the second piston rod.
2. A jack hydraulic system as claimed in claim 1 further comprising a stop valve (7), said stop valve (7) being located on the third oil path branch (11-2), the oil outlet of the large cylinder (8) being connected to the oil tank (5) via the third oil path branch (11-2).
3. The hydraulic jack system according to claim 1, wherein the handle (1) is fixed at one end and the middle part of the handle is hinged with the top end of the piston rod of the small cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064837.7U CN210795619U (en) | 2019-07-09 | 2019-07-09 | Jack hydraulic system suitable for heavy load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064837.7U CN210795619U (en) | 2019-07-09 | 2019-07-09 | Jack hydraulic system suitable for heavy load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210795619U true CN210795619U (en) | 2020-06-19 |
Family
ID=71245500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921064837.7U Active CN210795619U (en) | 2019-07-09 | 2019-07-09 | Jack hydraulic system suitable for heavy load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210795619U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112722250A (en) * | 2021-03-23 | 2021-04-30 | 常州市科惠电力设备有限公司 | Hydraulic actuating mechanism and unmanned aerial vehicle undercarriage |
| CN113309750A (en) * | 2021-05-25 | 2021-08-27 | 杭州天铭科技股份有限公司 | Hydraulic oil circuit system and hydraulic jack |
-
2019
- 2019-07-09 CN CN201921064837.7U patent/CN210795619U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112722250A (en) * | 2021-03-23 | 2021-04-30 | 常州市科惠电力设备有限公司 | Hydraulic actuating mechanism and unmanned aerial vehicle undercarriage |
| CN113309750A (en) * | 2021-05-25 | 2021-08-27 | 杭州天铭科技股份有限公司 | Hydraulic oil circuit system and hydraulic jack |
| CN113309750B (en) * | 2021-05-25 | 2023-11-07 | 杭州天铭科技股份有限公司 | Hydraulic oil circuit system and hydraulic jack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210795619U (en) | Jack hydraulic system suitable for heavy load | |
| CN205136180U (en) | Hydraulic system of big indisputable fill compression dustbin compression material loading simultaneous working | |
| CN109626250B (en) | Jack hydraulic system capable of saving labor for two times | |
| CN203939790U (en) | The reciprocal supercharging device of twin-tub | |
| CN1037759C (en) | Controller for hand-operated hydraulic press | |
| CN202346713U (en) | Buffering protection piston cylinder | |
| CN204342351U (en) | Secondary reinforcement Manual hydraulic jack | |
| CN203584934U (en) | Double-cavity pressurized oil cylinder device | |
| CN102182720A (en) | Double-speed oil cylinder | |
| CN117246391A (en) | Power distribution cabinet carrying device | |
| CN201273253Y (en) | Push-pull type hydraulic pump | |
| CN205277961U (en) | Cut fork truck's lift hydraulic system | |
| CN204938830U (en) | A kind of Quick lifting device of hydraulic jack | |
| CN107673259A (en) | High-effect hydraulic jack | |
| CN2853509Y (en) | Air-hydraulic linkage tipping device | |
| CN202073869U (en) | Dual-speed oil cylinder | |
| CN2421426Y (en) | Double-oil-way double-flow band hydraulic pump | |
| CN201357579Y (en) | Large-scale ultrahigh pressure piston plunger type cylinder | |
| CN201560093U (en) | Pneumatic hydraulic jack | |
| CN2373428Y (en) | Hydraulic jack | |
| CN205709677U (en) | The motorcycle repairing rack of double pump fast lifting | |
| CN110759274B (en) | Oil jack | |
| CN206668653U (en) | Tray carriage oil pump hydraulic control system | |
| CN205575451U (en) | Double oil cylinder jack for car | |
| CN103288005A (en) | Manual rapid portable extra-high-pressure hydraulic jack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |