CN215890340U

CN215890340U - Quick hand pump

Info

Publication number: CN215890340U
Application number: CN202121022717.8U
Authority: CN
Inventors: 张勇; 王荣; 牛思博
Original assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Current assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2022-02-22
Anticipated expiration: 2031-05-13

Abstract

The utility model belongs to the technical field of hand pumps, in particular to a quick hand pump, which comprises a pump shell, wherein the pump shell is provided with an inlet and an outlet for the inlet and the outlet of hydraulic oil, and the pump shell is also internally provided with an overflow valve, a safety valve and a stop valve, therefore, when the rapid hand pump is used, the oil circuit with the hydraulic elements is not required to be recombined outside the hand pump, so that the hand pump can be rapidly put into use and is very convenient, the stop valve is arranged between the inlet and the outlet, and can be opened to realize rapid pressure relief after the load supplied by the hand pump finishes working, in addition, a first plunger component and a second plunger component are arranged in the pump shell, and through the combination of the first plunger component and the second plunger component with an overflow valve and a safety valve, the hand pump is provided with a secondary pressure protection function, and faults or accidents caused by overload use of the hand pump exceeding rated working pressure can be avoided.

Description

Quick hand pump

Technical Field

The utility model belongs to the technical field of hand pumps, and particularly relates to a quick hand pump.

Background

The hand pump is a pump which drives hydraulic medium in a manual mode and is used as a power source of a hydraulic system, the hand pump is widely used in various hydraulic products, and particularly, the hand pump is more suitable than an electric hydraulic pump under the conditions of low use frequency, less hydraulic oil quantity, inconvenient power supply and the like. For example, chinese patent publication No. CN204900176U describes an axial plunger type bidirectional hand pump for driving an oil cylinder, in which a plunger structure is provided, and the driving of a hydraulic medium is realized by pressing the plunger structure.

At present, the function of a hand pump commonly used in the market is relatively single, generally only has the function of a pump, and when the hand pump is used, a hydraulic component needs to be externally connected, so that the whole hydraulic system where the hand pump is located needs to be recombined, and the hand pump is inconvenient to use and cannot be used quickly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a quick hand pump, which solves the technical problem that the hand pump in the prior art cannot be used quickly.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the quick hand pump comprises a pump shell, wherein the pump shell is provided with an inlet and an outlet for the inlet and the outlet of hydraulic oil, the pump shell is provided with a shaking assembly, the pump shell is internally provided with a first plunger assembly and a second plunger assembly which are connected to the shaking assembly, the input ends of the first plunger assembly and the second plunger assembly are communicated with the inlet, and the output ends of the first plunger assembly and the second plunger assembly are communicated with the outlet; an overflow valve, a safety valve and a stop valve are further arranged in the pump shell, the output end of the first plunger assembly is communicated with the input end of the overflow valve, the output end of the overflow valve is communicated with the inlet, and the safety valve and the stop valve are respectively communicated between the inlet and the outlet; an isolation check valve is arranged between the input end of the overflow valve and the output end of the first plunger assembly, so that hydraulic oil output by the first plunger assembly is prevented from flowing into the overflow valve; and the pump shell is internally provided with mounting holes for mounting the first plunger assembly, the second plunger assembly, the isolating one-way valve, the safety valve and the stop valve respectively and an oil path communicated according to the relation.

Preferably, the rocking assembly includes a rocking bar provided inside the pump housing and a handle sleeve provided outside, the rocking bar being connected to the handle sleeve through a rotating shaft, the rotating shaft being provided with a sealing cover connected to the pump housing.

Preferably, the first plunger assembly comprises a plunger sleeve, a plunger assembly mounting cavity is arranged in the pump shell, the mounting hole comprises a first mounting hole located in the plunger assembly mounting cavity, the plunger sleeve is in threaded connection with the first mounting hole, a plunger and a low-pressure area one-way valve and a high-pressure area one-way valve located on the upper side and the lower side of the plunger are arranged in the plunger sleeve, and the top of the plunger is connected to the end of the swing rod of the rocking assembly through a ball head connecting rod; the second plunger assembly is identical to the first plunger assembly in structure, the mounting hole comprises a second mounting hole located in the plunger assembly mounting cavity, and the second plunger assembly is mounted in the second mounting hole.

Preferably, the plunger comprises an annular sleeve matched with the inside of the plunger sleeve, the annular sleeve is in a step shape with the thick upper part and the thin lower part, the top of the annular sleeve is connected with a hollow seat, an oil passing hole is formed in the wall surface of the hollow seat, and the low-pressure area one-way valve is arranged at the bottom in the hollow seat.

Preferably, the rotating shaft is connected with the handle sleeve through a spline structure, a spline is arranged at the end part of the rotating shaft, and a spline sleeve is correspondingly arranged at the end part of the handle sleeve.

Compared with the prior art, the utility model has the beneficial effects that:

1. this swift formula hand pump includes the pump case, is equipped with plunger subassembly in the pump case to and overflow valve, relief valve, these hydraulic component of stop valve, overflow valve, relief valve, stop valve are installed on plunger subassembly's oil circuit, ensure that this hand pump can safe handling, in the use, need not have these hydraulic component's oil circuit outside hand pump reorganization, make this hand pump can drop into the use fast, and is very convenient.

2. Owing to be equipped with the stop valve in the pump case, the stop valve is installed between entry and export, finishes the back when the load work through this hand pump fuel feeding, can open the stop valve, realizes swift pressure release.

3. Because two sets of plunger assemblies are arranged in the pump shell, wherein the output end of the first plunger assembly is communicated with the input end of the overflow valve, the output end of the overflow valve is communicated with the inlet, the output end of the second plunger assembly is communicated with the outlet and is communicated with the input end of the safety valve, and the output end of the safety valve is communicated with the inlet, thus, the oil circuits of the first plunger assembly and the second plunger assembly are respectively a low-pressure working oil circuit and a high-pressure working oil circuit, when the pressure of the oil circuit in the hand pump is lower, the overflow valve is in a closed state, when the pressure of the oil circuit in the hand pump is increased to a designed value, the overflow valve is opened, the hydraulic oil of the low-pressure working oil circuit flows back to the oil tank, only the high-pressure working oil circuit works, and when the pressure of the high-pressure working oil circuit is continuously increased to exceed the designed value of the safety valve, the hydraulic oil pumped by the high-pressure working oil circuit also flows back to the oil tank through the safety valve, and the hand pump stops supplying oil outwards, therefore, the hand pump is provided with a secondary pressure protection function, and faults or accidents caused by overload use when the hand pump exceeds rated working pressure can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic perspective view of an embodiment of the hand pump of the present invention.

FIG. 2 is a bottom view of an embodiment of the hand pump of the present invention.

Fig. 3 is a schematic perspective view of a shaking assembly in an embodiment of the hand pump of the present invention.

FIG. 4 is a hydraulic schematic diagram of an embodiment of the hand pump of the present invention.

Fig. 5 is a schematic view of the first and second plunger assemblies installed in the pump housing in an embodiment of the hand pump of the present invention.

FIG. 6 is a top view of an embodiment of the hand pump of the present invention.

FIG. 7 is a schematic view of the overflow valve installed in the pump housing in an embodiment of the hand pump of the present invention.

In the drawings, each reference numeral means: the pump casing 1, the end cover 11, the inlet 12, the outlet 13, the plunger assembly mounting cavity 14, the first mounting hole 141, the second mounting hole 142, the rocking assembly 2, the swing rod 21, the handle sleeve 22, the spline housing 221, the connecting shaft 23, the rotating shaft 24, the spline 241, the sealing cover 25, the first plunger assembly 3, the plunger housing 30, the annular housing 31, the hollow seat 32, the oil passing hole 321, the second plunger assembly 4, the overflow valve 5, the valve housing 51, the valve core 52, the spring 53, the sealing cover 54, the safety valve 6, the stop valve 7 and the isolating one-way valve 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

a quick-action hand pump, please refer to fig. 1 to 7.

As shown in fig. 1, the rapid hand pump comprises a pump shell 1, the pump shell 1 comprises an end cover 11 at the top, the end cover 11 is connected to the top of the pump body 1 through a screw, as shown in fig. 2, an inlet 12 and an outlet 13 for hydraulic oil to enter and exit are arranged on the pump shell 1, the inlet 12 is used for being connected to an oil tank through a pipeline, the outlet 13 is used for being communicated to a load needing oil supply, such as a hydraulic cylinder, through a pipeline, so that the rapid hand pump can supply oil to the load and drive the load to work by shaking.

Specifically, the pump case 1 is provided with the rocking assembly 2, as shown in fig. 3, the rocking assembly 2 includes a rocking bar 21 arranged inside the pump case 1 and a handle sleeve 22 arranged outside the pump case 1, two ends of the rocking bar 21 are respectively provided with a U-shaped groove, a connecting shaft 23 is arranged in the U-shaped groove, and the connecting shaft 23 is used for connecting the plunger assembly inside the pump case 1. The pendulum rod 21 is connected to the front end of handle sleeve 22 through axis of rotation 24, the pendulum rod 21 is fixed at the 24 tip of axis of rotation, axis of rotation 24 passes through spline structural connection with handle sleeve 22, be equipped with spline 241 at the 24 tip of axis of rotation, handle sleeve 22 tip corresponds and is equipped with spline housing 221, can adjust the angle of connection of axis of rotation 24 and handle sleeve 22 like this, be equipped with the sealed lid 25 that is used for being connected to on the pump case 1 on axis of rotation 24, pump case 1 side is equipped with the through-hole that is used for supplying axis of rotation 24 to pass, thereby can set up the pendulum rod 21 of shaking subassembly 2 inside pump case 1, and handle sleeve 22 is located the outside, through connecting the handle of shaking on handle sleeve 22, can shake this hand pump.

As shown in fig. 4, a first plunger assembly 3 and a second plunger assembly 4 are provided in the pump housing 1, and the rocker assembly 2 is used to bring the first plunger assembly 3 and the second plunger assembly 4 into alternate motion.

Specifically, as shown in fig. 5, a plunger assembly installation cavity 14 is provided in the pump housing 1, the installation cavity 14 includes a first installation hole 141 and a second installation hole 142 at the bottom, the first plunger assembly 3 and the second plunger assembly 4 are respectively installed in the first installation hole 141 and the second installation hole 142, wherein, taking the first plunger assembly at the left as an example, the first plunger assembly includes a plunger sleeve 30, the plunger sleeve 30 is connected in the first installation hole 141 through a thread structure, a plunger is provided in the plunger sleeve 30, the plunger includes an annular sleeve 31 matched with the inside of the plunger sleeve 30, the annular sleeve 31 is in a step shape with a thick upper part and a thin lower part, a hollow seat 32 is connected to the top of the annular sleeve 31, an oil passing hole 321 is provided on the wall surface of the hollow seat 32, a low-pressure zone check valve 33 and a high-pressure zone check valve 34 are respectively provided on the upper and lower sides of the plunger, the low-pressure zone check valve 33 is provided at the bottom of the hollow seat 32, the hollow seat 32 at the top of the plunger is connected to a connecting shaft 23 at the end of the rocker assembly 2 through a ball connecting rod 35, thus, when the rocking handle connected to the handle sleeve 22 of the hand pump is rocked, the first plunger assembly 3 is driven to operate, pumping hydraulic oil. The second plunger assembly 4 is identical in construction to the first plunger assembly 3 and will not be described in detail herein.

As shown in fig. 4, the input ends of the first plunger assembly 3 and the second plunger assembly 4 are both communicated with the inlet 12, and the output ends are both communicated with the outlet 13, wherein an overflow valve 5, a safety valve 6 and a stop valve 7 are further arranged in the pump housing 1, the output end of the first plunger assembly 3 is communicated with the input end of the overflow valve 5, the output end of the overflow valve 5 is communicated with the inlet 12, the input end and the output end of the safety valve 6 are respectively communicated with the outlet 13 and the inlet 12, the two ends of the stop valve 7 are also respectively communicated with the inlet 12 and the outlet 13, and in addition, an isolating one-way valve 8 is arranged between the input end of the overflow valve 5 and the output end of the first plunger assembly 3 for preventing the hydraulic oil output by the first plunger assembly 3 from flowing into the overflow valve 5.

The pump shell 1 is internally provided with mounting holes for mounting an isolating one-way valve 8, a safety valve 6 and a stop valve 7 respectively, wherein the stop valve 7 is installed from the side surface of the pump shell 1 as shown in figure 1, the overflow valve 5 is installed from the bottom surface of the pump shell 1 as shown in figure 2, and the safety valve 6 is installed from the step surface of the middle part of the pump shell 1 as shown in figure 6. As shown in fig. 7, the relief valve 5 is inserted into the pump body 1 from the bottom, the relief valve 5 includes a valve sleeve 51, a valve body 52 is provided in the valve sleeve 51, a spring 53 is provided on the top of the valve body 52, the bottom of the valve sleeve 51 is closed by a seal cover 54, and when the spring 53 is compressed, the oil holes on the side surface of the valve body 52 reach the oil hole positions on the side surface of the valve sleeve 51, and the relief valve 5 is opened. In addition, an oil passage is provided inside the pump housing 1 so that the first plunger assembly, the second plunger assembly, and the respective hydraulic components communicate according to the principle in fig. 4.

The working principle of the quick hand pump is as follows:

(1) an inlet 12 and an outlet 13 on the pump shell 1 are respectively connected with an oil tank and a load driven by hydraulic pressure through pipelines, and are connected with a handle through a handle sleeve 22, oil paths where a first plunger assembly 3 and a second plunger assembly 4 in the pump shell 1 are respectively a low-pressure working oil path and a high-pressure working oil path, the handle connected with the handle sleeve 22 is pressed, the inlet 12 takes oil, and the outlet 13 outputs hydraulic oil;

(2) when the pressure of an oil line in the hand pump is lower, the overflow valve 5 is in a closed state, the low-pressure working oil line and the high-pressure working oil line work simultaneously, the flow in the hand pump is larger, namely the flow of the outlet 13 is larger;

(3) when the pressure of the oil circuit in the hand-operated pump is increased to a designed value, the overflow valve 5 is opened, the hydraulic oil of the low-pressure working oil circuit flows back to the oil tank, only the high-pressure working oil circuit works, the flow of the oil circuit in the hand-operated pump is reduced, the handle force of the hand-operated pump is prevented from being too large, and internal parts of the hand-operated pump are prevented from being damaged;

(4) when the pressure of the high-pressure working oil way exceeds the design value of the safety valve 6, the hydraulic oil pumped out by the high-pressure working oil way also flows back to the oil tank through the safety valve 6, the hand pump stops supplying oil outwards, and faults or accidents caused by overload use of the hand pump when the pressure exceeds the rated working pressure are further avoided;

(5) when the stop valve 7 is closed, the position between the inlet 12 and the outlet 13 is not affected, and when the stop valve 7 is opened, hydraulic oil in the outlet 13 and a load can quickly flow back to the inlet 12, so that quick pressure relief is realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The phrase "comprising a defined element does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a swift formula hand pump, includes the pump case, be equipped with the entry and the export that are used for the hydraulic oil business turn over on the pump case, be equipped with on the pump case and wave subassembly, its characterized in that: a first plunger assembly and a second plunger assembly which are connected to the shaking assembly are arranged in the pump shell, the input ends of the first plunger assembly and the second plunger assembly are communicated with the inlet, and the output ends of the first plunger assembly and the second plunger assembly are communicated with the outlet; an overflow valve, a safety valve and a stop valve are further arranged in the pump shell, the output end of the first plunger assembly is communicated with the input end of the overflow valve, the output end of the overflow valve is communicated with the inlet, and the safety valve and the stop valve are respectively communicated between the inlet and the outlet; an isolation check valve is arranged between the input end of the overflow valve and the output end of the first plunger assembly, so that hydraulic oil output by the first plunger assembly is prevented from flowing into the overflow valve; and an oil path and mounting holes for mounting the first plunger assembly, the second plunger assembly, the isolating one-way valve, the safety valve and the stop valve are formed in the pump shell.

2. A shortcut hand pump in accordance with claim 1 wherein: the swing assembly comprises a swing rod arranged in the pump shell and a handle sleeve positioned outside, the swing rod is connected to the handle sleeve through a rotating shaft, and a sealing cover connected to the pump shell is arranged on the rotating shaft.

3. A shortcut hand pump in accordance with claim 2 wherein: the first plunger assembly comprises a plunger sleeve, a plunger assembly mounting cavity is arranged in the pump shell, the mounting hole comprises a first mounting hole located in the plunger assembly mounting cavity, the plunger sleeve is in threaded connection with the first mounting hole, a plunger, a low-pressure area one-way valve and a high-pressure area one-way valve are arranged in the plunger sleeve and located on the upper side and the lower side of the plunger, and the top of the plunger is connected to the end part of a swing rod of the rocking assembly through a ball head connecting rod; the second plunger assembly is identical to the first plunger assembly in structure, the mounting hole comprises a second mounting hole located in the plunger assembly mounting cavity, and the second plunger assembly is mounted in the second mounting hole.

4. A shortcut hand pump in accordance with claim 3 wherein: the plunger comprises an annular sleeve matched with the inside of the plunger sleeve, the annular sleeve is in a step shape with the upper portion being thick and the lower portion being thin, the top of the annular sleeve is connected with a hollow seat, an oil passing hole is formed in the wall surface of the hollow seat, and the low-pressure area one-way valve is arranged at the bottom in the hollow seat.

5. A shortcut hand pump in accordance with claim 2 wherein: the rotating shaft is connected with the handle sleeve through a spline structure, a spline is arranged at the end of the rotating shaft, and a spline sleeve is correspondingly arranged at the end of the handle sleeve.