CN219654873U - Novel pump body device of hydraulic tool - Google Patents

Abstract

The utility model belongs to the technical field of hydraulic tools, and particularly relates to a novel pump body device of a hydraulic tool, which comprises a pump body, wherein the pump body is provided with a pump shell, a plunger cavity and a piston cavity are formed in the pump shell, the plunger cavity and the piston cavity are communicated through a transportation flow passage, and an oil inlet passage is formed in the pump shell and used for communicating an oil storage cavity and the plunger cavity; the oil control cavity is communicated with the piston cavity through an oil outlet and return channel; the oil control cavity is communicated with the oil storage cavity through an oil return flow passage; the oil control cavity is communicated with the oil inlet channel through the oil passing channel and the oil outlet channel; the oil control assembly is arranged in the oil control cavity and is provided with an impact part; when the oil control cavity is communicated with the oil passing channel and the oil outlet channel, the pump body device is in an oil inlet state; when the oil control cavity is switched to be communicated with the oil return flow passage, the pump body device is in an oil return state. According to the pump body device, the movable oil control assembly is arranged, so that the piston cavity is communicated with the oil return channel or the oil inlet runner, and the pump body device can still normally start to work in an oil return state in which the piston cavity is communicated with the oil storage cavity.

Description

Novel pump body device of hydraulic tool

Technical Field

The utility model belongs to the technical field of hydraulic tools, and particularly relates to a novel pump body device of a hydraulic tool.

Background

The electric hydraulic tool utilizes a motor to drive a plunger device to supply oil to a hydraulic cylinder.

When the automatic relief valve of the existing electric hydraulic tool is opened and the piston is not completely reset and the electric hydraulic tool is restarted, oil pumped by the hydraulic pump to the hydraulic cylinder directly flows back to an oil bag (an oil storage device) through the automatic relief valve, continuous work cannot be performed, and the piston must be waited for being completely reset to an initial state to perform next work. In the practical application process, an automatic relief valve of the electric hydraulic tool is opened, and the waiting time for piston reset is longer, particularly for the electric hydraulic tool with a longer stroke, so that the construction efficiency can be seriously influenced; meanwhile, the existing electric hydraulic tool is large in general volume and heavy in weight, and a user can hold the electric hydraulic tool for a long time with a relatively heavy effort.

Therefore, the existing hydraulic tools have the problems of inconvenient use or long time and power waste when being used. Meanwhile, the existing hydraulic tool cannot work continuously in the oil return process, and the hydraulic tool can be started continuously after oil return is in place, so that a new hydraulic tool oil return mode is needed so that the hydraulic tool can still be started normally in an oil return state.

Disclosure of Invention

The purpose of the utility model is that: the novel pump body device of the hydraulic tool is provided, and the oil control assembly is arranged to enable the piston cavity to be communicated with the oil return flow passage or the oil passing passage.

The purpose of the utility model is realized in the following way:

a novel pump body device for a hydraulic tool, comprising:

the pump body is provided with a pump shell, the pump shell is formed with a plunger cavity and a piston cavity, the plunger cavity and the piston cavity are communicated through a transportation flow channel, and the pump shell is formed with an oil inlet one-way valve for communicating the oil storage cavity and the plunger cavity;

the oil control assembly is arranged in the oil control cavity of the pump shell and used for controlling the conduction between the piston cavity and the oil storage cavity;

the oil control cavity of the pump shell is communicated with the piston cavity through an oil outlet and return channel of the transportation flow channel;

the oil control cavity of the pump shell is communicated with the oil storage cavity through an oil return flow passage of the transportation flow passage;

the oil control cavity of the pump shell is communicated with the oil inlet one-way valve through an oil passing channel and an oil outlet channel of the transportation flow channel;

wherein the oil control assembly is provided with an impact part which movably stretches into the oil passing channel;

when the oil control cavity of the pump shell is communicated with the oil passing channel and the oil outlet channel, the pump body device is in an oil inlet state;

when the oil control cavity of the pump shell is switched to be communicated with the oil return flow passage, the pump body device is in an oil return state.

Further, the oil control assembly has:

the valve core seat is arranged in the oil control cavity of the pump shell, and the oil return flow passage is formed in the valve core seat;

the oil control valve needle is movably arranged in the oil control cavity of the pump shell, and the outer wall of the oil control valve needle is convexly formed with an abutting plate;

the elastic piece is sleeved on the oil control valve needle, and the end parts of the elastic piece are respectively abutted against the abutting plate and the valve core seat;

the oil outlet of the oil passing channel is provided with a boss, and the abutting plate is movably abutted against the boss under the action of the elastic piece;

when oil supply begins, the end part of the oil control valve needle is abutted against the oil return flow passage;

when the oil supply is stopped, the abutment plate abuts against the boss.

Further, a conical head is formed at one end, close to the oil return flow passage, of the oil control valve needle;

when the oil supply is started, the conical head part stretches into the oil return passage so that the oil return passage is blocked with the oil outlet return passage.

Further, an anti-shake table is sleeved on the oil control valve needle, and two sides of the anti-shake table are respectively abutted against the abutting plate and the elastic piece;

the distance from the outer wall of the shaking prevention table to the inner wall of the oil control cavity of the pump shell is smaller than the distance from the outer wall of the abutting plate to the inner wall of the oil control cavity of the pump shell.

The pump body is also provided with a pump seat;

the oil control cavity and the oil return flow passage of the pump shell are formed in the pump seat;

wherein, the oil return runner has at least:

the end part of the first flow dividing channel is provided with a flow dividing opening, and the flow dividing opening is formed at the end part of the transition flow channel; and

two ends of the second flow dividing flow passage are communicated with the oil outlet and the side wall of the oil control cavity of the pump shell;

the oil control valve needle is movably abutted against the shunt opening to enable the piston cavity to be communicated with the first shunt flow passage or the second shunt flow passage.

Further, the pump seat is provided with at least a first oil return passage which is communicated with the first diversion flow passage;

the pump shell is provided with a second oil return channel, one end of the second oil return channel is communicated with the first oil return channel, and the other end of the second oil return channel is provided with a diversion oil return port in a molded mode at the end part of the pump shell.

Further, the pump body is also provided with a positioning component, the upper end of the positioning component is arranged in the pump seat, and the lower end of the positioning component is arranged in the pump shell;

and the first oil return passage is formed in the positioning member.

Further, the pump shell is also provided with a safety valve cavity communicated with the oil storage cavity, and the safety valve cavity is communicated with the oil passing channel through a pressure relief runner;

the surface of the pump shell is also provided with a pressure relief opening;

the safety valve cavity is movably provided with a safety valve core, and the end part of the safety valve core is movably abutted against the end opening of the pressure relief flow channel, so that the oil passing channel is communicated with or cut off from the pressure relief opening.

Further, a control component is arranged in the oil passing channel, so that the oil outlet channel and the oil passing channel are communicated or cut off;

and when the oil control cavity of the pump shell is disconnected from the oil passing channel, the plunger cavity is communicated with the safety valve cavity.

Further, the control assembly has:

the oil outlet one-way valve is arranged in the oil passing channel; and

the oil control seat is arranged in the oil control cavity of the pump shell;

wherein the oil control assembly is arranged in the oil control seat;

the oil outlet one-way valve enables the oil passing channel to be in one-way conduction with the oil control cavity of the pump shell, and the upper end of the oil control seat is abutted against the bottom end of the pump seat to form the gap.

Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

1. through setting up movable accuse oil subassembly for piston chamber and oil return channel or advance oil flow way and switch on, when the impact portion stretches into the oil passageway, pump case device still can normally start work under the oil return state that piston chamber and oil storage chamber switched on.

2. By arranging the oil control valve needle and the valve core seat, when oil supply begins, the end part of the oil control valve needle is abutted against the oil return channel, and then the oil outlet and return channel is communicated with the oil inlet one-way valve; when the oil supply is stopped, the abutting plate abuts against the boss under the action of the elastic piece, so that the oil outlet and return channel is communicated with the oil return channel.

3. The end part of the oil control valve needle is provided with the conical head, so that the conical head movably stretches into the oil return flow passage, and the oil control valve has better blocking effect on the oil return flow passage.

4. Through setting up and preventing shaking the platform extrusion elastic component for oil control needle is faster more light to block up the oil passage when returning oil, can also avoid controlling the oil subassembly and rock the accuse oil pocket of leading to dislocation in the pump case simultaneously.

5. The outer wall of the oil control valve needle, which is close to one end of the boss, is provided with the impact part, so that collision interference between the oil control valve needle and the boss in the moving process is avoided.

6. Through set up the pump seat in the oil cap intracavity for control accuse oil needle can switch on piston chamber and oil-out or plunger chamber, need not to change pump case molding, only need set up the oil cap chamber, and add the pump seat and can realize, the design is simple, low in manufacturing cost.

7. The pump seat is internally provided with a first oil return passage and a second oil return passage, and the plunger cavity is communicated with the oil storage cavity through the first oil return passage and the second oil return passage.

8. The pump shell is provided with a safety valve cavity, and the safety valve cavity is provided with a pressure relief opening, and the conduction between the safety valve cavity and the oil passing channel is controlled through the safety valve core, so that the oil can be discharged through the manual pressure relief of the safety valve cavity.

9. The oil outlet channel and the oil passing channel are controlled to be communicated through the control component, so that a gap between the oil cover cavity and the pump seat is directly communicated or cut off, and further the plunger cavity and the safety valve cavity are controlled to be communicated.

10. The oil outlet one-way valve which is in one-way conduction is arranged in the control assembly, so that oil can only flow from the oil passing channel to the oil control cavity of the pump shell, and further, oil is discharged from the safety valve cavity or the shunt oil return port in an oil return state.

Drawings

FIG. 1 is a schematic structural view of a first embodiment;

fig. 2 is a schematic view of an oil passage according to the first embodiment;

fig. 3 is an enlarged view of a portion a in fig. 2;

fig. 4 is an enlarged view of a portion B in fig. 2;

fig. 5 is a schematic structural view of a second embodiment;

FIG. 6 is one of the schematic diagrams of the second embodiment;

FIG. 7 is a cross-sectional view A-A of FIG. 6;

fig. 8 is an enlarged view of a portion C in fig. 7;

FIG. 9 is a second schematic diagram of a second embodiment;

FIG. 10 is a U-U cross-sectional view of FIG. 9;

FIG. 11 is a third schematic illustration of the second embodiment;

FIG. 12 is a D-D sectional view of FIG. 11;

FIG. 13 is a J-J cross-sectional view of FIG. 11;

FIG. 14 is a fourth schematic diagram of the second embodiment;

FIG. 15 is a T-T cross-sectional view of FIG. 14;

FIG. 16 is a cross-sectional view of K-K of FIG. 11;

fig. 17 is a C-C cross-sectional view of fig. 11.

In the figure: 1. a pump housing; 2. an oil control assembly; 3. a pump base; 4. a control assembly; 5. a gap; 6. a discharge port; 7. an oil storage chamber; 8. a positioning member; 11. a plunger cavity; 12. a piston chamber; 13. an oil suction port; 14. an oil inlet; 15. a safety valve cavity; 16. a pressure relief port; 17. a safety valve core; 18. an oil cap cavity; 19. a second oil return passage; 21. an oil control valve needle; 22. an elastic member; 23. a valve core seat; 31. a first flow dividing channel; 32. a second flow dividing channel; 33. a first oil return passage; 41. an oil outlet one-way valve; 42. an oil control seat; 30. a gap flow channel; 141. an oil outlet channel; 142. an oil passage; 144. an oil inlet one-way valve; 145. an oil control cavity; 146. an oil outlet and return passage; 147. an oil return flow passage; 148. a boss; 151. a pressure relief flow passage; 191. a shunt oil return port; 211. an abutment plate; 212. a conical head; 213. an anti-shake table; 214. an impact section; 311. a shunt port; 1411. an oil outlet.

Detailed Description

The utility model will be further described with reference to specific examples, to which the utility model is not limited.

[ embodiment one ]

Embodiments provide a pump body device for a hydraulic tool.

As shown in fig. 1 to 4, the pump body device of the hydraulic tool provided in this embodiment includes a pump housing 1 and an oil control assembly 2. The pump shell 1 is provided with a plunger cavity 11 and a piston cavity 12, and the plunger cavity 11 and the piston cavity 12 are communicated through a transportation flow channel; the pump housing 1 is also formed with an oil inlet check valve 144 for communicating the oil reservoir chamber 7 with the plunger chamber 11. One end of the oil inlet check valve 144 is an oil inlet 14 arranged on the outer surface of the pump shell 1, and the other end is a conducting plunger cavity 11.

The oil reservoir 7 may be an internal chamber of the oil reservoir or may be a space defined by the oil reservoir and the pump housing 1. In this embodiment the oil reservoir is an oil bag and the oil reservoir 7 is a space enclosed by the oil bag and the pump housing 1. Specifically, the oil pocket is not shown in fig. 1.

The transport channel means a channel through which oil flows in the pump casing 1. The surface of the pump shell 1 is provided with an oil inlet 14 and an oil outlet 1411. The oil inlet 14 is communicated with the oil storage cavity 7 and the pump shell 1, and oil flows into the plunger cavity 11 from the oil storage cavity 7 through the oil inlet 14 during oil inlet; oil returns from the oil outlet 1411 to the oil reservoir 7 when the oil is discharged.

The plunger chamber 11 is used for setting a plunger, the piston chamber 12 is used for setting a piston, and both the plunger chamber 11 and the piston chamber 12 are communicated with a transportation flow passage so that oil can flow into or out of the plunger chamber 11 and the piston chamber 12.

During normal operation, oil flows out from the oil bag, enters the plunger cavity 11 from the oil inlet 14 under the suction action of the plunger, and enters the piston cavity 12 through the transportation flow channel; after stopping the oil flows out of the piston chamber 12 and returns from the oil outlet 1411 back to the oil pocket.

The oil control assembly 2 is installed in the oil control cavity 145 of the pump shell 1 and is used for controlling the communication between the piston cavity 12 and the oil storage cavity 7.

Specifically, the transportation flow passage includes an oil outlet passage 141, an oil passing passage 142, and an oil outlet return passage 146. Wherein the oil outlet channel 141 is communicated with the plunger cavity 11; the oil passing channel 142 is communicated with the plunger cavity 11 through the oil suction port 13, and the oil control cavity 145 and the oil outlet channel 141 are communicated; the drain-back passage 146 communicates the oil control chamber 145 with the piston chamber 12.

The oil control assembly 2 is formed with an oil return passage 147 communicating with the oil reservoir 7. The piston chamber 12 is brought into communication with the oil return passage 147 or the oil passage 142 by controlling the oil control assembly 2. When the piston cavity 12 is communicated with the oil return flow passage 147, the pump shell device stops working and is in an oil return state, and the oil outlet and return passage 146 is communicated with the oil return flow passage 147; when the piston cavity 12 is communicated with the oil passing channel 142, the pump shell device is in an operating state for oil feeding, and the oil feeding one-way valve 144 is communicated with the oil outlet return channel 146. By the design of the oil control assembly 2, when the pump shell device stops working, the pump shell device can also run again without waiting for the end of oil return.

Specifically, the oil control assembly 2 includes a spool seat 23, an oil control needle 21, and an elastic member 22. The valve core seat 23 is installed in the oil control chamber 145 of the pump housing 1, and the oil return flow passage 147 is formed in the valve core seat 23. The oil control valve needle 21 is movably arranged in the oil control cavity 145, and an abutting plate 211 is formed on the outer wall in a protruding mode; the elastic member 22 is sleeved on the oil control valve needle 21, and the end parts of the elastic member are respectively abutted on the abutting plate 211 and the oil control seat.

The oil outlet of the oil passage 142 is formed with a boss 148, and the abutment plate 211 is movably abutted against the boss 148 under the action of the elastic member 22.

Wherein the abutment plate 211 is movably abutted against the boss 148; the end of the oil control needle 21 is movable against the end opening of the oil outlet channel 141. When the pump shell device normally feeds oil, the piston cavity 12 is communicated with the oil control cavity 145, and the pressure of the oil passage 142 enables the end of the oil control valve needle 21 to abut against the end opening of the oil outlet passage 141; when the pump housing stops feeding, the piston spring in the piston chamber 12 causes the oil in the piston chamber 12 to flow out of the oil outlet return passage 146, and the impact control valve needle 21 causes the abutment plate 211 to abut against the boss 148 and seal the port of the oil passage 142, at which time the piston chamber 12 is in communication with the oil outlet passage 141.

In this embodiment, a conical head 212 is formed at one end of the oil control needle 21 near the oil return passage 147, and when oil supply is started, the conical head part extends into the oil return passage 147 to block the oil return passage 147 and the oil outlet oil return passage 146. The design of the conical head 212 makes the blocking effect of the oil control valve needle 21 better.

The oil control valve needle 21 is further sleeved with an anti-shake table 213, and two sides of the anti-shake table are respectively abutted against the abutting plate 211 and the elastic piece 22. The anti-shake table 213 compresses the space of the elastic member 22, so that the force acting on the oil control needle 21 is greater when the elastic member 22 is restored, which is beneficial to restoring the oil control needle 21. Meanwhile, the distance from the outer wall of the anti-shaking table 213 to the inner wall of the oil control cavity 145 is smaller than the distance from the outer wall of the abutting plate 211 to the inner wall of the oil control cavity 145, so that the space between the oil control assembly 2 and the inner wall of the oil control cavity 145 is compressed, the shaking amplitude of the oil control assembly 2 can be reduced, and the malposition of the oil control assembly 2 and the interference collision of the inner wall of the oil control cavity 145 are avoided.

The oil control valve needle 21 is close to the inner concave forming of the outer wall of one end of the boss 148 and is provided with an impact part 214, and the design of the inner concave forming of the impact part 214 prevents the oil control valve needle 21 from interfering with the boss 148 in the moving process, so that the oil control cavity 145 and the oil control valve needle 21 are protected.

The pump housing 1 also has a relief valve chamber 15, which communicates with the oil passage 142 via a relief flow channel 151. The surface of the pump shell 1 is provided with a pressure relief opening 16. The safety valve cavity 15 is provided with a movable safety valve core 17, and the end part of the movable safety valve core is movably abutted against the end opening of the pressure relief flow channel 151, so that the oil passing channel 142 is communicated with or blocked from the pressure relief opening 16. When the end of the safety valve core 17 abuts against the end opening of the pressure relief flow channel 151, the oil passing channel 142 is cut off from the pressure relief opening 16, and the pump shell device normally feeds oil; when the end of the relief spool 17 does not abut against the end opening of the relief flow channel 151, the oil passage 142 communicates with the relief port 16, and oil is discharged from the pump housing 1 through the oil passage 142 from the relief port 16 via the oil passage 142. Through the design of the safety valve cavity 15 and the safety valve core 17, when the pressure in the pump shell 1 is too high, oil can be discharged out of the pump shell 1 through the pressure relief flow channel 151, and the damage of a pump shell device is avoided.

Further, a locking piece is fixed at the top end of the pump shell 1 through a bolt fastener, the lower end of the locking piece abuts against the top end of the safety valve core 17, and the abutting of the other end of the safety valve core 17 against the end opening of the pressure relief flow channel 151 is controlled. That is, the user can open the safety valve core 17 by pressing the locking piece to release the pressure in the pump shell, so that the operation is simple and safe.

In summary, when the hydraulic tool is started, the plunger is pressed down to make the oil in the oil storage chamber enter the plunger chamber 11 through the oil inlet check valve 144, and the oil enters the oil passing channel 142 through the oil outlet channel 141 to impact the oil control assembly 2 to make the conical head 212 abut against the oil return channel 147, at this time, the oil enters the oil control chamber 145 from the oil passing channel 142 along the boss 148, and then enters the piston chamber 12 from the oil outlet oil return channel 146.

When the hydraulic tool is stopped, the plunger is reset, at the moment, the oil inlet check valve 144 is blocked, oil cannot flow into the plunger cavity 11, so that the pressure of the oil passing channel 142 is reduced, and at the moment, the oil control assembly 2 moves to enable the abutting plate 211 to abut the boss 148, so that the oil passing channel 142 is blocked from the oil control cavity 145; simultaneously, the conical head 212 is out of contact with the oil return flow passage 147, so that the oil outlet oil return passage 146 is communicated with the oil return flow passage 147, and oil in the piston cavity 12 is automatically decompressed from the oil return flow passage 147.

When the piston is not completely reset, the piston is started again, and oil enters the plunger cavity 11 from the oil inlet one-way valve 144 and enters the oil passing channel 142 through the oil outlet channel 141; at this time, however, the oil passage 142 is blocked from the oil control chamber 145, and thus the pressure in the oil passage 142 increases, and the end of the relief valve spool 17 is pushed open so that the oil passage 142 is communicated with the relief flow passage 151 and discharged from the relief port 16.

[ example two ]

The second embodiment is basically identical to the first embodiment, except that the pump body provided in the second embodiment further has a pump seat 3. The piston chamber 12 in the second embodiment is a notch for connecting the oil bag and the piston, and is described below with the piston chamber 12. See in particular fig. 5-17.

In this embodiment, the oil control assembly 2 is not provided with the valve core seat 23, and the oil control chamber 145 and the oil return passage 147 are formed in the pump seat 3. The surface of the pump seat 3 is provided with a discharge port 6. The oil return flow passage 147 is provided with a first flow dividing flow passage 31 and a second flow dividing flow passage 32, a flow dividing opening 311 is arranged at the end part of the first flow dividing flow passage 31, and the flow dividing opening 311 is formed at the end part of the oil control cavity 145; both ends of the second split runner 32 are communicated with the oil outlet 1411 and the side wall of the oil control cavity 145. A clearance runner 30 is arranged between the oil inlet 14 and the pump seat 3. The oil control valve needle 21 is movably abutted against the shunt opening 311, so that the piston cavity 12 is communicated with the first shunt flow passage 31 or the second shunt flow passage 32. When the oil control valve needle 21 abuts against the shunt opening 311, the oil outlet 1411 is communicated with the second shunt flow passage 32, and oil can enter the second shunt flow passage 32 from the oil inlet check valve 144 and be discharged from the oil outlet 1411; note that, the second split flow passage 32 in the second embodiment corresponds to the first oil return flow passage 147 in the first embodiment.

When the plunger stops working, oil enters the second flow dividing runner 32 from the oil outlet 1411 and returns to the oil control cavity 145; at this time, the oil control valve needle 21 does not abut against the shunt opening 311, the oil outlet 1411 is communicated with the shunt flow passage two 32, the oil control chamber 145 and the shunt opening 311, and oil can enter the shunt flow passage one 31 from the oil control chamber 145 and then enter the safety valve cavity 15 through the shunt flow passage one 31.

The pump seat 3 is provided with at least a first oil return passage 33 which is communicated with the first diversion flow passage 31; the pump housing 1 has a second oil return channel 19, one end of which is in communication with the first oil return channel 33, and the other end of which has a split oil return opening 191 at the end of the pump housing 1.

The pump body is also provided with a positioning component 8, the upper end of which is arranged in the pump seat 3, and the lower end of which is arranged in the pump shell 1; and a first oil return passage 33 is formed in the positioning member 8. The pump seat 3 can be quickly and accurately installed by arranging the positioning member 8; meanwhile, the pump seat 3 can be placed to rotate, and the function of fixing the pump seat 3 is achieved.

And oil returns through the relief valve, the oil passes from the oil outlet 1411, through the oil control chamber 145, and to the relief valve chamber 15. Specifically, a control component 4 is arranged in the oil passing channel 142, so that the oil control cavity 145 and the oil passing channel 142 are conducted or cut off; a gap 5 exists between the control assembly 4 and the bottom end of the pump seat 3, and when the gap 5 is communicated with the control assembly 4 so that the oil control cavity 145 is blocked from the oil passing channel 142, the plunger cavity 11 is communicated with the safety valve cavity 15.

When the pump case device stops working, oil is returned at the moment, the oil control cavity 145 is blocked with the oil passing channel 142, the machine is restarted at the moment, the plunger cavity 11 is filled with oil through the oil inlet one-way valve, and as the oil control cavity 145 is blocked with the oil passing channel 142, oil enters the oil cover cavity 18 from the oil passing channel, then enters the pressure relief flow channel 151 from the gap 5 and then enters the safety valve cavity 15.

Wherein the control assembly 4 is provided with an oil outlet one-way valve 41 and an oil control seat 42. The oil outlet check valve 41 is arranged in the oil passing channel 142; the oil control seat 42 is disposed in the oil passage 142. The oil control assembly 2 is arranged in the oil control seat 42, and the oil outlet one-way valve 41 is arranged to enable the oil outlet channel 142 to be in one-way conduction with the oil outlet channel 141, so that when the pump shell device stops working and returns oil, the pump shell device can be directly restarted, and at the moment, the inside of the pump shell directly returns oil through the gap 5.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. A novel pump body device of hydraulic tool, characterized by comprising:

a pump body having a pump housing (1);

the pump shell (1) is formed with a plunger cavity (11) and a piston cavity (12), the plunger cavity (11) and the piston cavity (12) are communicated through a transportation flow passage, and the pump shell (1) is formed with an oil inlet one-way valve (144) for communicating the oil storage cavity (7) and the plunger cavity (11);

an oil control assembly (2) which is arranged in the oil control cavity (145) of the pump shell (1) and is used for controlling the communication between the piston cavity (12) and the oil storage cavity (7);

an oil control cavity (145) of the pump shell (1) is communicated with the piston cavity (12) through an oil outlet and return channel (146) of the transportation flow channel;

the oil control cavity (145) of the pump shell (1) is communicated with the oil storage cavity (7) through an oil return flow passage (147) of the transportation flow passage;

the oil control cavity (145) of the pump shell (1) is communicated with the oil inlet one-way valve (144) through the oil passing channel (142) and the oil outlet channel (141) of the transportation flow channel;

wherein the oil control assembly (2) is provided with an impact part (214) which movably stretches into the oil passing channel (142);

when the oil control cavity (145) of the pump shell (1) is communicated with the oil passing channel (142) and the oil outlet channel (141), the pump body device is in an oil inlet state;

when the oil control cavity (145) of the pump shell (1) is switched to be communicated with the oil return flow passage (147), the pump body device is in an oil return state.

2. The novel pump body device of a hydraulic tool according to claim 1, wherein:

the oil control assembly (2) has:

a valve core seat (23) which is installed in the oil control cavity (145) of the pump shell (1), and the oil return flow passage (147) is formed in the valve core seat (23);

an oil control valve needle (21) which is movably arranged in an oil control cavity (145) of the pump shell (1), and the outer wall of which is convexly formed with an abutting plate (211);

an elastic piece (22) which is sleeved on the oil control valve needle (21) and the end parts of which are respectively abutted on the abutting plate (211) and the valve core seat;

an oil outlet of the oil passing channel (142) is formed with a boss (148), and the abutting plate (211) is movably abutted against the boss (148) under the action of the elastic piece (22);

when oil supply is started, the end part of the oil control valve needle (21) is abutted against the oil return flow passage (147);

when the oil supply is stopped, the abutment plate (211) abuts the boss (148).

3. The novel pump body device of a hydraulic tool according to claim 2, wherein:

a conical head (212) is formed at one end, close to the oil return flow passage (147), of the oil control valve needle (21);

when the oil supply is started, the conical head part extends into the oil return passage (147) so that the oil return passage (147) is blocked with the oil outlet return passage (146).

4. A novel pump body device for a hydraulic tool according to claim 2 or 3, characterized in that:

an anti-shaking table (213) is also sleeved on the oil control valve needle (21), and two sides of the oil control valve needle are respectively abutted against the abutting plate (211) and the elastic piece (22);

the distance from the outer wall of the shaking prevention table (213) to the inner wall of the oil control cavity (145) of the pump shell (1) is smaller than the distance from the outer wall of the abutting plate (211) to the inner wall of the oil control cavity (145) of the pump shell (1).

5. The novel pump body device of a hydraulic tool of claim 4, wherein:

the pump body is also provided with a pump seat (3);

an oil control cavity (145) and an oil return flow passage (147) of the pump shell (1) are formed in the pump seat (3);

wherein the oil return flow passage (147) has at least:

the end part of the first diversion flow passage (31) is provided with a diversion opening (311), and the diversion opening (311) is formed at the end part of the transition flow passage (143); and

two ends of the second flow dividing channel (32) are communicated with the oil outlet (1411) and the side wall of the oil control cavity (145) of the pump shell (1);

the oil control valve needle (21) is movably abutted against the shunt opening (311) so that the piston cavity (12) is communicated with the first shunt flow passage (31) or the second shunt flow passage (32).

6. The novel pump body device of a hydraulic tool of claim 5, wherein:

the pump seat (3) is provided with at least a first oil return passage (33) which is communicated with the first diversion flow passage (31);

the pump shell (1) is provided with a second oil return channel (19), one end of the second oil return channel is communicated with the first oil return channel (33), and the other end of the second oil return channel is provided with a diversion oil return opening (191) at the end part of the pump shell (1).

7. The novel pump body device of a hydraulic tool of claim 6, wherein:

the pump body is also provided with a positioning component (8), the upper end of the positioning component is arranged in the pump seat (3), and the lower end of the positioning component is arranged in the pump shell (1);

and the first oil return passage (33) is formed in the positioning member (8).

8. The novel pump body device of a hydraulic tool of claim 5, wherein:

the pump shell (1) is also provided with a safety valve cavity (15) communicated with the oil storage cavity (7), and the safety valve cavity (15) is communicated with the oil passing channel (142) through a pressure relief flow channel (151);

the surface of the pump shell (1) is also provided with a pressure relief opening (16);

the safety valve cavity (15) is internally and movably provided with a safety valve core (17), and the end part of the safety valve core is movably abutted against the end opening of the pressure relief flow channel (151) so that the oil passing channel (142) is communicated with or disconnected from the pressure relief opening (16).

9. The novel pump body device of a hydraulic tool of claim 8, wherein:

a control component (4) is arranged in the oil passing channel (142) and is used for conducting or cutting off the oil outlet channel (141) and the oil passing channel (142);

the plunger piston comprises a pump seat (3), a pump shell (1) and a plunger piston cavity (11), wherein a gap (5) is formed between the control assembly (4) and the bottom end of the pump seat (3), and when the gap (5) is communicated with the control assembly (4) so that a control oil cavity (145) of the pump shell (1) is disconnected with an oil passing channel (142), the plunger piston cavity (11) is communicated with a safety valve cavity (15).

10. The novel pump body device of a hydraulic tool of claim 9, wherein:

the control unit (4) has:

an oil outlet check valve (41) provided in the oil passage (142); and

an oil control seat (42) which is arranged in an oil control cavity (145) of the pump shell (1);

wherein the oil control assembly (2) is arranged in an oil control seat (42);

the oil outlet one-way valve (41) enables the oil passing channel (142) to be in one-way conduction with the oil control cavity (145) of the pump shell (1), and the upper end of the oil control seat (42) is abutted against the bottom end of the pump seat (3) to form the gap (5).