CN110657080A - Double-speed manual pressure pump for hydraulic device of short-stroke hydraulic cylinder - Google Patents
Double-speed manual pressure pump for hydraulic device of short-stroke hydraulic cylinder Download PDFInfo
- Publication number
- CN110657080A CN110657080A CN201910854093.7A CN201910854093A CN110657080A CN 110657080 A CN110657080 A CN 110657080A CN 201910854093 A CN201910854093 A CN 201910854093A CN 110657080 A CN110657080 A CN 110657080A
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- Prior art keywords
- pump
- pump plunger
- hole
- shaft part
- plunger
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
- F04B3/003—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage with two or more pistons reciprocating one within another, e.g. one piston forning cylinder of the other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
Abstract
The invention discloses a double-speed manual pressure pump for a hydraulic device of a short-stroke hydraulic cylinder, which comprises a pump body, wherein the middle part of the pump body is provided with two circular holes with different diameters, the circular hole is communicated with the circular hole, the upper circular hole with a larger diameter is internally provided with a pressure ring in sliding seal fit with the inner wall of the upper circular hole, a step through hole in the middle part of the pressure ring is in sliding fit with a pump plunger, the pump plunger can drive the pressure ring to move upwards together, the lower circular hole with a smaller diameter is in sliding seal fit with the pump plunger, and the bottom of the lower circular hole is provided; the pump plunger comprises a stepped shaft part in sliding fit with the stepped through hole and a threaded shaft part positioned above the stepped shaft part, a cover body is fixedly connected above the pump body, and the threaded shaft part of the pump plunger is in threaded connection with the cover body; the upper part of the pressurizing ring is provided with a circle of steps, and a pressure spring is connected between the bottom of the cover body and the steps. The pressure pump enables the short-stroke hydraulic cylinder to run fast in no-load and move slowly in working stroke, and is beneficial to saving the whole pressure time.
Description
Technical Field
The invention relates to the field of pressurizing equipment, in particular to a two-speed manual pressurizing pump for a short-stroke hydraulic cylinder hydraulic device.
Background
The short-stroke hydraulic cylinder hydraulic device generally refers to a hydraulic device which can complete the clamping action of a hydraulic cylinder through one stroke of a pressurizing pump, in some simple mechanical devices, the short-stroke hydraulic cylinder hydraulic device (such as a hydraulic bench clamp) is often used for clamping an object, and before working pressure is generated, the hydraulic device basically needs to go through an idle stroke with a certain length, and then can go through a pressure stroke. In order to improve the working efficiency of the hydraulic device, during the idle stroke, the working piston of the hydraulic cylinder needs to move quickly, and during the working stroke, the working piston of the hydraulic cylinder needs to move with high pressure and slow speed to clamp the object.
The existing manual pressurizing hydraulic device basically adopts a fixed pressurizing ratio, namely the ratio of the diameter of a working hydraulic cylinder to the diameter of a plunger pump is a fixed value, so that the ratio of the working pressure output by the hydraulic cylinder to the manual force is not changed. Because of the manual pressurization mode, the pressurization acting force is limited, in order to realize large working pressure, the pressurization mechanism is required to have a large pressurization ratio, and the larger the pressurization ratio is, the same working stroke of the hydraulic cylinder is required to be generated, the plunger pump is required to have a large pressurization stroke or multiple pressurization strokes, so that the manual workload and the pressurization time are increased, and the working efficiency is reduced. If a larger pump plunger is used, a larger pressure needs to be applied to the pump plunger at the later stage of pressurization, because manual pressurization is adopted, the manual force of a person is increased, and even the situation that objects cannot be clamped is caused.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a two-speed manual pressure pump for a hydraulic device of a short-stroke hydraulic cylinder, wherein the pressure pump realizes a first-speed and then-slow oil supply process in a single pressure stroke, so that the short-stroke hydraulic cylinder can be operated quickly when no load is applied, and can be moved with a slow and large acting force in a working stroke, thereby saving the overall pressure time and improving the working efficiency of the hydraulic device.
The technical scheme adopted by the invention to solve the technical problems is as follows: a double-speed manual pressure pump for a short-stroke hydraulic cylinder hydraulic device comprises a pump body, wherein the middle part of the pump body is provided with two circular holes with different diameters, the circular hole is communicated with the other circular hole, a pressure ring in sliding seal fit with the inner wall of the circular hole is arranged in the circular hole with the larger diameter, a step through hole is arranged in the middle of the pressure ring, a pump plunger in sliding fit with the inner wall of the step through hole is arranged in the step through hole, the pump plunger can drive the pressure ring to move upwards together, the lower circular hole with the smaller diameter is in sliding seal fit with the pump plunger, and the bottom of; the pump plunger comprises a stepped shaft part in sliding fit with the stepped through hole of the pressurizing ring, and also comprises a threaded shaft part positioned above the stepped shaft part, a cover body is fixedly connected above the pump body, and the threaded shaft part of the pump plunger is in threaded connection with the cover body so that the pump plunger can move up and down relative to the cover body through rotation; the upper part of the pressurizing ring is provided with a circle of steps, and a pressure spring used for pushing the pressurizing ring to move downwards is connected between the bottom of the cover body and the steps.
Furthermore, the middle part of the cover body is provided with a through hole consistent with the axis of the cover body, and the through hole comprises a small-diameter part, a large-diameter part and a thread part from top to bottom; and an upper end small shaft part matched with the small diameter part of the through hole is further arranged above the threaded shaft part of the pump plunger, a gap is reserved between the threaded shaft part of the pump plunger and the large diameter part of the through hole, and the threaded shaft part of the pump plunger is in threaded connection with the threaded part of the through hole.
Furthermore, the one end that the screw axial region was kept away from to the little axial region of upper end is equipped with and is used for driving pump plunger pivoted handle.
Furthermore, the stepped shaft part of the pump plunger comprises a small cylinder positioned above and a large cylinder positioned at the bottom of the small cylinder, and the large cylinder is in sliding sealing fit with a lower circular hole with a smaller diameter in the pump body.
Further, the cover body, the pump body and the pump plunger are coaxial.
Has the advantages that:
as described above, the two-speed manual booster pump for a hydraulic device of a short-stroke hydraulic cylinder according to the present invention has the following advantageous effects:
1. when the hydraulic device is in a low-pressure no-load stroke, the pressure pump can utilize the pressure rod to rotate the pump plunger so that the pump plunger and the pressure ring perform axial synchronous motion in the pump body, can generate more liquid (oil) discharge amount, and can complete a low-pressure stroke by enabling the hydraulic cylinder piston to rapidly move; when the hydraulic system needs pressurization in a working stroke, the pressurizing ring stops moving when being pressed to the bottom surface of the circular hole in the pump body, and the pump plunger with a smaller cross section area independently moves to realize a slow large-pressure stroke of the hydraulic cylinder piston. The time is saved integrally, the working efficiency is improved, and the production cost is reduced.
2. The sectional area of the pump plunger for the pressure pump is smaller, so that the double-speed pressure pump has a larger pressure ratio and can obtain a large pressure boosting effect.
3. When the specified clamping action is completed, the reduced stroke of the pressurizing pump can be adopted, or the working stroke of the hydraulic cylinder can be effectively increased when the stroke of the pressurizing pump is fixed.
The present invention will be described in further detail with reference to the drawings and specific examples.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a sectional view of the pressurizing pump in the present invention with the pump plunger and the pressurizing ring at the upper starting point.
Fig. 2 is a sectional view of the pressurizing pump in the present invention with the pressurizing ring at the bottom dead center.
Fig. 3 is a sectional view of the pressurizing pump in the present invention with the pressurizing ring at the bottom dead center and the pump plunger at the lower position.
The pump comprises graphic marks, 1, a handle, 2, a pump plunger, 3, a cover body, 31, a through hole, 4, a pressure spring, 5, a pressurizing ring, 6, a pump body, 61, an upper circular hole, 62, a lower circular hole, 63 and an oil hole.
Detailed Description
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed; the specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, the terms such as "upper", "lower", "left", "right", "middle", "I" and "II" used in the present specification are for simplicity and clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial technical changes.
The core of the invention is to provide a double-speed manual pressure pump for a short-stroke hydraulic cylinder hydraulic device, and the pressure pump is matched with a short-stroke hydraulic cylinder, so that the quick-speed and slow-speed double-speed movement of the short-stroke hydraulic cylinder can be realized.
It should be noted that "slow motion" in the present invention is relative to fast motion, and the actual motion speed is about the normal motion speed of most hydraulic devices.
Referring to fig. 1 ~ and fig. 3, the two-speed manual booster pump for a hydraulic device of a short-stroke hydraulic cylinder provided by the invention mainly comprises a handle 1, a pump plunger 2, a cover body 3, a pressure spring 4, a booster ring 5 and a pump body 6.
Specifically, this force (forcing) pump includes the pump body 6, the pump body 6 middle part is equipped with the unequal circular port of two diameters that are linked together, is equipped with in the great last circular port 61 of diameter with the inner wall sliding seal complex pressure ring 5 of last circular port 61, and pressure ring 5 is coaxial to be equipped with the step through-hole, is equipped with in the step through-hole rather than inner wall sliding fit's pump plunger 2.
Specifically, the pump plunger 2 includes an upper end small shaft portion, a threaded shaft portion, and a stepped shaft portion located at a lower portion in this order from top to bottom. The stepped shaft part of the pump plunger 2 is in sliding fit with the stepped through hole of the pressurizing ring 5, and the pump plunger 2 can drive the pressurizing ring 5 to move upwards together through the stepped shaft part.
The stepped shaft part of the pump plunger 2 is in sliding sealing fit with a lower circular hole 62 with a smaller diameter in the pump body 6, and the bottom of the lower circular hole 62 with the smaller diameter is communicated with an oil hole 63 which can be communicated with a hydraulic cylinder.
A cover body 3 is fixedly connected above the pump body 6, and the threaded shaft part of the pump plunger 2 is in threaded connection with the cover body 3 so that the pump plunger 2 can move up and down relative to the cover body 3; a circle of steps are arranged at the upper part of the pressurizing ring 5, and a pressure spring 4 used for pushing the pressurizing ring 5 to move downwards is connected between the bottom of the cover body 3 and the steps.
In detail, the middle part of the cover body 3 is provided with a through hole 31 consistent with the axis of the cover body 3, and the through hole 31 comprises a small-diameter part, a large-diameter part and a thread part from top to bottom; the upper end small shaft portion of the pump plunger 2 is fitted to the small diameter portion of the through hole 31, a gap is left between the threaded shaft portion of the pump plunger 2 and the large diameter portion of the through hole 31, and the threaded shaft portion of the pump plunger 2 is screwed to the threaded portion of the through hole 31.
It should be noted that, the handle 1 for driving the pump plunger 2 to rotate is arranged at the end of the upper end small shaft part far away from the threaded shaft part. The handle 1 has a certain force-increasing effect.
In detail, the stepped shaft portion of the pump plunger 2 includes a small cylinder located above and a large cylinder located at the bottom of the small cylinder, and the large cylinder is in sliding sealing fit with a lower circular hole 62 with a smaller diameter in the pump body 6.
Preferably, the cover 3, the pump body 6 and the pump plunger 2 are of coaxial design, facilitating the manufacture of the pressure pump.
Specifically, this embodiment the quantity of pressure spring is one, and pressure spring 4 cover is established on pressure ring 5, and pressure spring 4 places with pressure ring 5 is coaxial, and the effort of pressure spring 4 can make the piston of pneumatic cylinder produce the idle stroke of less pressure. In other embodiments, the number of the compression springs 4 may also be two or more, the compression springs 4 are uniformly distributed between the bottom of the cover body 3 and the step of the pressurizing ring 5, and the resultant force generated by each compression spring 4 can enable the piston of the hydraulic cylinder to generate a small-pressure idle stroke.
In the embodiment of the invention, the screw mechanism is adopted to drive the pump plunger to axially move, so as to provide power for the short-stroke hydraulic cylinder hydraulic device. In other embodiments, a cam mechanism or a lever mechanism can be used for driving the pump plunger to move axially to provide power for the hydraulic device of the short-stroke hydraulic cylinder.
In the following detailed description of the working principle of the pressurizing pump, a cavity formed by the upper circular hole 61 in the middle of the pump body 6 is defined as an upper circular cavity; the cavity formed by the lower circular hole 62 in the middle of the pump body 6 is defined as a lower circular cavity. The action principle of the pressure pump is as follows: the handle 1 is rotated to drive the pump plunger 2 to rotate, the pump plunger 2 descends through the matching of the external thread on the pump plunger 2 and the internal thread of the cover body 3, the pressurizing ring 5 synchronously descends under the pressure action of the pressure spring 4 to force the volume in the upper circular cavity in the pump body 6 to be reduced (as shown in figure 2), oil in the upper circular cavity enters the hydraulic cylinder through the lower circular cavity and the oil hole 63 and the oil way at the lower part of the pump body 6 to move the working piston of the hydraulic cylinder, and in the process, the pump plunger 2 and the pressurizing ring 5 synchronously move, so that the oil discharging speed is high, and the piston of the hydraulic cylinder can rapidly move; the pressurizing ring 5 moves downwards to the lower initial point (as shown in figure 2), the volume of the upper circular cavity is 0, the lower surface of the pressurizing ring 5 is contacted with the bottom surface of the upper circular hole 61 of the pump body 6 to stop moving, the handle 1 is continuously rotated, the stepped shaft part of the pump plunger 2 enters the lower circular hole 62 of the pump body 6, so that the volume of the lower circular cavity is reduced (as shown in figure 3), and when oil is continuously pumped to the hydraulic cylinder, because only the pump plunger 2 works, the sectional area is smaller, the produced oil discharge amount is less, so that the hydraulic cylinder piston moves slowly, and because the sectional area of the pump plunger 2 is smaller, the pressurizing ring has larger pressurizing ratio, and can obtain large pressurizing effect; during return stroke, the handle 1 is rotated reversely, the pump plunger 2 returns upwards, when the step part with the step shaft part at the lower end of the pump plunger 2 contacts the pressurizing ring 5, the pressurizing ring 5 is driven to return together by overcoming the elasticity of the pressure spring 4, the volume of the lower circular cavity and the volume of the upper circular cavity are gradually increased, oil returns to a hydraulic system, and the piston of the hydraulic cylinder returns at first slowly and then quickly.
The pressure pump can utilize the handle to rotate the pump plunger to enable the pump plunger and the pressure ring to move axially in the pump body to realize pressurization of the short-stroke hydraulic cylinder, so that the hydraulic device can run quickly, and then the pump plunger moves downwards independently to realize slow motion of the hydraulic device.
The two-speed hand-operated booster pump for a short stroke hydraulic cylinder hydraulic apparatus provided by the present invention has been described in detail above, and the principle and the embodiments of the present invention are explained herein using specific examples, which are only used to help understand the method and the core idea of the present invention. It should be noted that any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are within the protective scope of the present invention to those skilled in the art.
Claims (5)
1. A double-speed manual force (forcing) pump for short stroke pneumatic cylinder hydraulic means, characterized by, including the pump body (6), the middle part of the pump body (6) is equipped with two unequal circular ports of diameter that are linked together, there are forcing rings (5) with the inner wall sliding seal fit of the upper circular port (61) in the upper circular port (61) with the bigger diameter, there are step through holes in the middle part of forcing rings (5), there are pump plungers (2) with its inner wall sliding fit in the step through hole, the pump plunger (2) can drive the forcing rings (5) to move up together, the smaller lower circular port (62) of diameter is in the pump body (6) and is fitted with the pump plunger (2) sliding seal, there are oil holes (63) communicated with pneumatic cylinder at the bottom of the lower circular port (62; the pump plunger (2) comprises a stepped shaft part in sliding fit with the stepped through hole of the pressurizing ring (5) and a threaded shaft part positioned above the stepped shaft part, a cover body (3) is fixedly connected above the pump body (6), and the threaded shaft part of the pump plunger (2) is in threaded connection with the cover body (3) so that the pump plunger (2) can move up and down relative to the cover body (3) through rotation; a circle of steps are arranged at the upper part of the pressurizing ring (5), and a pressure spring (4) used for pushing the pressurizing ring (5) to move downwards is connected between the bottom of the cover body (3) and the steps.
2. A two-speed manual booster pump for hydraulic devices of short-stroke hydraulic cylinders according to claim 1, characterized in that the central part of the cover (3) is provided with a through hole (31) coinciding with the axis of the cover (3), the through hole (31) comprising, from top to bottom, a small-diameter portion, a large-diameter portion and a threaded portion; an upper end small shaft part matched with the small diameter part of the through hole (31) is further arranged above the threaded shaft part of the pump plunger (2), a gap is reserved between the threaded shaft part of the pump plunger (2) and the large diameter part of the through hole (31), and the threaded shaft part of the pump plunger (2) is in threaded connection with the threaded part of the through hole (31).
3. A two-speed manual booster pump for a short stroke hydraulic cylinder unit as claimed in claim 2 wherein the end of the upper small shaft portion remote from the threaded shaft portion is provided with a handle (1) for rotating the pump plunger (2).
4. A two-speed manual booster pump for short stroke hydraulic cylinder hydraulics according to claim 1 characterised in that the stepped shaft portion of the pump plunger (2) comprises an upper small cylinder and a lower larger cylinder at the base of the small cylinder, the larger cylinder being in sliding sealing engagement with a lower circular bore (62) of smaller diameter in the pump body (6).
5. A two-speed manual booster pump for short stroke hydraulic cylinder hydraulics according to claim 1 wherein the cover (3), pump body (6) and pump plunger (2) are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910854093.7A CN110657080B (en) | 2019-09-10 | 2019-09-10 | Double-speed manual pressure pump for hydraulic device of short-stroke hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910854093.7A CN110657080B (en) | 2019-09-10 | 2019-09-10 | Double-speed manual pressure pump for hydraulic device of short-stroke hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110657080A true CN110657080A (en) | 2020-01-07 |
| CN110657080B CN110657080B (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910854093.7A Active CN110657080B (en) | 2019-09-10 | 2019-09-10 | Double-speed manual pressure pump for hydraulic device of short-stroke hydraulic cylinder |
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| CN (1) | CN110657080B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2469578A1 (en) * | 1979-11-15 | 1981-05-22 | Gateau Internal Sarl | Control for reciprocating hydraulic piston pump - has double co-axial piston with independent control via pawl |
| US5542827A (en) * | 1995-02-08 | 1996-08-06 | Navistar International Transportation Corp. | Multiple nested pistons hand priming pump with spring biasing |
| US20120233989A1 (en) * | 2009-12-08 | 2012-09-20 | Les Chaussures Stc Inc. | Fluid compression system |
| CN204553138U (en) * | 2014-12-18 | 2015-08-12 | 山西平阳重工机械有限责任公司 | A kind of manual simplified hydraulic test pump |
-
2019
- 2019-09-10 CN CN201910854093.7A patent/CN110657080B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2469578A1 (en) * | 1979-11-15 | 1981-05-22 | Gateau Internal Sarl | Control for reciprocating hydraulic piston pump - has double co-axial piston with independent control via pawl |
| US5542827A (en) * | 1995-02-08 | 1996-08-06 | Navistar International Transportation Corp. | Multiple nested pistons hand priming pump with spring biasing |
| US20120233989A1 (en) * | 2009-12-08 | 2012-09-20 | Les Chaussures Stc Inc. | Fluid compression system |
| CN204553138U (en) * | 2014-12-18 | 2015-08-12 | 山西平阳重工机械有限责任公司 | A kind of manual simplified hydraulic test pump |
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| Publication number | Publication date |
|---|---|
| CN110657080B (en) | 2022-02-15 |
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Application publication date: 20200107 Assignee: Luoyang 808 Intelligent Photoelectric Technology Co.,Ltd. Assignor: HENAN University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980025516 Denomination of invention: Two-speed manual booster pump for short-stroke hydraulic cylinder hydraulic device Granted publication date: 20220215 License type: Common License Record date: 20230103 |
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