CN219837734U

CN219837734U - Electric hydraulic tool

Info

Publication number: CN219837734U
Application number: CN202320903175.8U
Authority: CN
Inventors: 田富刚; 杨其军
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-10-17
Anticipated expiration: 2033-04-19

Abstract

The technical scheme relates to the technical field of electric hydraulic tools, in particular to an electric hydraulic tool, which comprises: an oil pump device; a hydraulic device mounted at a front end of the oil pump device; the driving device is arranged at the rear end of the oil pump device and is used for driving a plunger mechanism of the oil pump device to work; the driving device supplies oil to the hydraulic device through the oil pump device to drive the working head to work; wherein the oil pump device includes: a pump body in which a plunger mechanism is installed; the oil box mechanism is arranged on the lower side of the pump body and is arranged on the outer side of the shell of the driving device, and an oil storage cavity is formed by matching with the pump body; and the hydraulic circuit is arranged in the pump body and is used for realizing the circulating flow of hydraulic oil in the oil box mechanism, the pump body and the hydraulic device. According to the utility model, the pump body is arranged outside the shell, so that the problem of installation trouble caused by the need of disassembling the shell for maintenance and replacement in the existing design can be solved without disassembling the shell when the oil pump device and the hydraulic device are maintained and replaced.

Description

Electric hydraulic tool

Technical Field

The technical scheme relates to the technical field of electric hydraulic tools, in particular to an electric hydraulic tool.

Background

The electric hydraulic tool is widely applied in the present life, and can realize different functions only by replacing a working head, for example, the electric hydraulic tool can be an electric hydraulic shearing tool, an electric hydraulic crimping tool or an electric hydraulic pipe expanding tool, and is mainly applied to the aspects of pipeline connection and the like.

However, such designs have drawbacks: because parts such as motor and hydraulic means are all wrapped up by the shell, button, pilot lamp, circuit board also install in the shell simultaneously, in case the instrument breaks down or when needing maintenance, just need to pull down the shell wholly, carry out subsequent maintenance to the pump body again and change, in case pull down, will lead to the disorder in position between each part, very troublesome when installing again, waste time and energy.

Disclosure of Invention

The purpose of this technical scheme is to provide an electric hydraulic tool, through arranging the pump body outside the casing, when maintaining and changing oil pump unit and hydraulic means, need not to dismantle the casing so just can solve the needs in the current design and dismantle the casing and maintain the trouble problem of installation that changes and bring.

The technical scheme aims at realizing the following steps:

an electro-hydraulic tool comprising:

an oil pump device;

a hydraulic device mounted at the front end of the oil pump device for mounting the working head;

the driving device is arranged at the rear end of the oil pump device and is used for driving a plunger mechanism of the oil pump device to work;

the driving device supplies oil to the hydraulic device through the oil pump device to drive the working head to work;

wherein the oil pump device includes:

the pump body is internally provided with a plunger cavity, and a plunger mechanism is arranged in the plunger cavity;

the oil box mechanism is arranged on the lower side of the pump body and is arranged on the outer side of the shell of the driving device, and an oil storage cavity is formed by matching with the pump body;

and the hydraulic circuit is arranged in the pump body and is used for realizing the circulating flow of hydraulic oil in the oil box mechanism, the pump body and the hydraulic device.

Preferably, the hydraulic circuit includes:

the oil control assembly is arranged in the oil control cavity of the pump body and used for controlling the conduction between the oil control cavity and the plunger cavity in the oil pump device;

the oil return assembly is arranged in the oil return cavity of the pump body and used for controlling the conduction between the oil control cavity and the eccentric cavity in the pump body, and the eccentric cavity is communicated with the oil storage cavity;

when the driving device drives the plunger mechanism to work, under the action of oil pressure, the oil return assembly cuts off the conduction between the oil control cavity and the eccentric cavity in the pump body, and meanwhile, the oil control cavity is conducted with the plunger cavity in the oil pump device, so that oil is supplied to the hydraulic device;

when the driving device stops driving the plunger mechanism to work, the oil control assembly cuts off conduction between the oil control cavity and the plunger cavity in the oil pump device, meanwhile, the oil control cavity is conducted with the eccentric cavity in the pump body, and at the moment, oil in the hydraulic device flows into the eccentric cavity and finally flows back to the oil storage cavity.

Preferably, an oil return cavity, an oil control cavity and the eccentric cavity are formed in the pump body;

the oil control cavity is communicated with the plunger cavity through a first channel;

the oil return cavity is communicated with the eccentric cavity through a second channel;

the oil control cavity is communicated with a hydraulic cavity of the hydraulic device through a channel three.

The oil return cavity is communicated with the plunger cavity through a channel IV;

and the oil return cavity is communicated with the oil control cavity through a channel six.

Preferably, a safety cavity for installing a safety valve is also formed in the pump body;

the channel is communicated with the safety cavity in a four-way mode, and the safety cavity is communicated with the eccentric cavity in a five-way mode through the channel.

Preferably, the oil return assembly has at least:

the oil return seat is internally provided with an oil return channel, and the oil return channel conducts the second channel and the sixth channel;

the oil return valve core is movably arranged at the bottom of the oil return cavity and used for blocking conduction between the fourth channel and the oil return cavity;

under the action of hydraulic oil difference, the oil return valve core is driven to move in the oil return cavity, so that the oil return channel is conducted or closed.

Preferably, the oil return valve core at least comprises:

the core column is movably arranged at the bottom of the oil return cavity, and a gap between the core column and the side wall of the oil return cavity is sealed through a sealing ring;

the core ball is movably arranged between the core column and the oil return seat;

through the movement of the core column, the sealing of the core ball or the conduction of the horn-shaped oil outlet of the oil return channel are realized.

Preferably, the oil control assembly has at least:

the oil control valve core is movably arranged in the oil control cavity;

the oil control valve seat is in threaded connection with the oil control cavity;

the first return spring is movably arranged in the oil control cavity, and the end parts of the first return spring are respectively abutted against the oil control valve core and the oil control valve seat;

the oil inlet end of the oil control cavity is blocked by the oil control valve core under the action of the first reset spring.

Preferably, a sealing sleeve is arranged in the oil inlet end of the oil control cavity, and the oil control valve core is movably abutted to the end part of the sealing sleeve and used for sealing.

Compared with the prior art, the technical scheme has the advantages that:

1. the technical scheme is that the pump body is arranged outside the shell, and when the oil pump device and the hydraulic device are maintained and replaced, the shell is not required to be disassembled, so that the assembly process is simplified, and the assembly efficiency is improved.

2. According to the technical scheme, automatic oil return can be realized in a hydraulic circuit designed on the pump body, namely oil is supplied when the driving device drives the plunger mechanism to work; when the driving device stops driving the plunger mechanism to work, oil is returned, the trouble of manual oil return is omitted, the use is simpler and more convenient, the use can be carried out at any time, and the use efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of the whole machine in the technical scheme.

Fig. 2 is a cross-sectional view of the whole machine in the technical scheme.

Fig. 3 is a schematic structural diagram of the oil pump device and the hydraulic device according to the present technical solution.

Fig. 4 is a cross-sectional view A-A of fig. 3.

Fig. 5 is a C-C cross-sectional view of fig. 3.

Fig. 6 is a schematic diagram of an internal hydraulic circuit in the pump body according to the present embodiment.

Fig. 7 is a schematic structural diagram of an oil return assembly according to the present technical solution.

Fig. 8 is a schematic structural diagram of an oil control assembly according to the present disclosure.

Reference numerals: 1. an oil pump device; 2. a hydraulic device; 3. a working head; 4. a driving device; 5. a pump body; 6. a plunger cavity; 7. a plunger mechanism; 8. an oil box mechanism; 9. an oil storage chamber; 10. a hydraulic circuit; 11. an oil control assembly; 12. an oil return assembly; 13. an eccentric cavity; 14. a first channel; 15. a second channel; 16. a third channel; 17. a fourth channel; 18. a fifth channel; 19. a sixth channel; 20. channel eight; 21. an oil control cavity; 22. an oil return cavity; 23. a hydraulic chamber; 24. a safety cavity; 25. a safety valve; 26. an oil return seat; 27. an oil return passage; 28. an oil return valve core; 29. a stem; 30. a core ball; 31. a horn-shaped oil outlet; 32. an oil control valve core; 33. an oil control valve seat; 34. a first reset spring; 35. sealing sleeve; 36. and a deceleration eccentric assembly.

Detailed Description

The following describes the specific embodiments of the present technical solution in further detail with reference to the accompanying drawings.

As shown in fig. 1-8, an electro-hydraulic pipe expanding tool is mainly used for expanding the inner diameter of a port of a pipe fitting, and mainly comprises: an oil pump device 1, a hydraulic device 2 and a driving device 4;

the hydraulic device 2 is mounted at the front end of the oil pump device 1, the driving device 4 is mounted at the rear end of the oil pump device 1, the working head 3 is mounted on the hydraulic device 2, the driving device 4 drives the oil pump device 1 to work to supply oil to the hydraulic device 2, so that the piston of the hydraulic device 2 is driven to move, the working head 3 can work, crimping operation can be performed when the working head 3 adopts a crimping head, shearing operation can be performed when the working head 3 adopts a shearing head, and the like.

Wherein the driving device 4 comprises a shell, a motor, a control board and the like;

the motor and the control board are both arranged and fixed in the shell, and after the power is on, the motor can work through the relevant matching of the switch and the control board.

The oil pump device 1 is located outside the housing, is not wrapped by the housing, and mainly comprises: the pump body 5, the oil box mechanism 8 and the hydraulic circuit 10;

the shell is fixed on the rear end face of the pump body 5, an eccentric cavity 13 is formed in the pump body 5, a deceleration eccentric component 36 of the driving device 4 is arranged in the eccentric cavity 13, the deceleration eccentric component 36 is connected with an output shaft of the motor, and the motor can drive the deceleration eccentric component to rotate.

The hydraulic circuit 10 is arranged in the pump body 5, the oil box mechanism 8 is arranged at the lower end of the pump body 5, and an oil storage cavity 9 can be formed by matching with the lower end surface of the pump body 5.

The pump body 5 is provided with a plunger cavity 6, a plunger mechanism 7 is arranged in the plunger cavity 6, the deceleration eccentric assembly is abutted to the upper end of the plunger mechanism 7, when the motor drives the deceleration eccentric assembly to rotate, the plunger mechanism 7 is pressed down, so that oil is sucked into the plunger cavity 6 from the oil storage cavity 9, and then is supplied into a hydraulic cavity 23 of the hydraulic device 2 through the hydraulic circuit 10, oil supply is realized, and the principle of the plunger mechanism 7 is the existing design and is not specifically developed.

The pump body 5 is arranged outside the shell, and the shell is not required to be disassembled when the oil pump device 1 and the hydraulic device 2 are maintained and replaced, so that the installation positions of the components such as the control board, the switch and the like are not affected, the movement is avoided, the assembly process is simplified, and the assembly efficiency is improved.

The hydraulic circuit 10 includes: the oil control assembly 11, the oil return assembly 12, a plurality of channels and one-way valves;

specifically, a plunger cavity 6, an eccentric cavity 13, an oil control cavity 21 and an oil return cavity 22 are formed in the pump body 5, and meanwhile, a first channel 14, a second channel 15, a third channel 16, a fourth channel 17, a fifth channel 18, a sixth channel 19, a seventh channel (not marked in the drawing) and a eighth channel 20 are also formed in the pump body 5;

the upper end of the plunger cavity 6 is communicated with the eccentric cavity 13, so that the upper end of the plunger mechanism 7 can extend into the eccentric cavity 13 to be matched with the deceleration eccentric assembly, and the lower end of the plunger cavity 6 is communicated with the oil storage cavity 9 through a channel eight 20; the oil control cavity 21 is communicated with the plunger cavity 6 through a first channel 14, and in the embodiment, the first channel 14 and a eighth channel 20 are communicated; an oil inlet guide valve and an oil outlet one-way valve are arranged in the channel eight 20 to be matched with the plunger mechanism 7 so as to realize that oil is sucked into the plunger cavity 6 from the oil storage cavity 9 and then is pressed into the flow direction in the oil control cavity 21;

the oil control cavity 21 is communicated with a hydraulic cavity 23 of the hydraulic device 2 through a channel III 16, so that oil is supplied to the hydraulic cavity 23 to drive the piston to move.

In order to realize oil return, the oil control cavity 21 and the oil return cavity 22 are communicated through a channel six 19, the oil return cavity 22 and the eccentric cavity 13 are communicated through a channel two 15, and the oil return cavity 22 and the plunger cavity 6 are communicated through a channel four 17;

the oil control assembly 11 is installed in the oil control chamber 21, and the oil return assembly 12 is installed in the oil return chamber 22.

Working principle:

when the driving device 4 drives the plunger mechanism 7 to work, oil in the oil storage cavity 9 is firstly sucked into the plunger cavity 6, then the oil control assembly 11 is jacked up, hydraulic oil is pressed into the oil control cavity 21 through the first channel 14, meanwhile, high-pressure oil flowing out of the plunger cavity 6 moves against the oil return assembly 12 through the fourth channel 17, so that the conduction between the oil control cavity 21 and the eccentric cavity 13 in the pump body 5 is cut off, and at the moment, the hydraulic oil is completely pressed into the hydraulic cavity 23 through the third channel 16, so that oil supply is realized;

when the driving device 4 stops driving the plunger mechanism 7 to work, oil is not supplied at this time, under the action of a spring in the hydraulic device 2, the oil pressure in the hydraulic cavity 23 is higher than the oil pressure in the first channel 14 and the fourth channel 17, at this time, under the action of the oil pressure, the oil return assembly 12 returns to the initial state, the oil control cavity 21 is communicated with the eccentric cavity 13 in the pump body 5, the oil control assembly 11 cuts off the conduction between the oil control cavity 21 and the plunger cavity 6, at this time, the oil in the hydraulic cavity 23 flows into the eccentric cavity 13 sequentially through the third channel 16, the oil control cavity 21, the sixth channel 19, the oil return cavity 22 and the second channel 15, and finally flows back to the oil storage cavity 9, so that oil return is realized, and the hydraulic device 2 is reset.

By adopting the design, automatic oil return can be realized, namely, oil is supplied when the driving device 4 drives the plunger mechanism 7 to work; when the driving device 4 stops driving the plunger mechanism 7 to work, oil is returned, the trouble of manual oil return is omitted, the use is simpler and more convenient, the use can be carried out at any time, and the use efficiency is improved.

In order to further improve the convenience of use and the safety of use, a safety cavity 24 is further formed in the pump body 5, a safety valve 25 is installed in the safety cavity 24, the safety cavity 24 is communicated with the channel IV 17, the oil inlet end at the lower end of the oil control cavity 21, the lower end of the oil return cavity 22 and the safety cavity 24 can be communicated, the common pressure is realized, and the safety cavity 24 is communicated with the eccentric cavity 13 through the channel IV 18.

When the oil pressure reaches the set value, the relief valve 25 is triggered, and at this time, even if the plunger mechanism 7 is still operating, the supplied oil enters the fourth passage 17 through the lower end of the oil control chamber 21, enters the relief chamber 24, flows into the eccentric chamber 13 through the fifth passage 18, and finally flows back to the oil reservoir chamber 9.

When the relief valve 25 is triggered, there may be a case that the oil pressure of the first channel 14 is lower than the oil pressure of the third channel 16 and the sixth channel 19, at this time, the oil return assembly 12 is returned to the initial state, the oil control cavity 21 is conducted with the eccentric cavity 13 in the pump body 5, the oil control assembly 11 cuts off the conduction between the oil control cavity 21 and the plunger cavity 6, at this time, the oil in the hydraulic cavity 23 flows into the eccentric cavity 13 sequentially through the third channel 16, the oil control cavity 21, the sixth channel 19, the oil return cavity 22 and the second channel 15, and finally flows back to the oil storage cavity 9, so that oil return is realized, and the hydraulic device 2 is reset.

The safety is better after the design like this, and foretell oil return all flows into eccentric cavity 13 simultaneously in, and hydraulic oil can lubricate the eccentric subassembly that slows down, avoids too much wearing and tearing, guarantees life.

The oil return assembly 12 is configured as follows:

the oil return assembly 12 has at least:

the oil return seat 26 is provided with an oil return channel 27, and the oil return channel 27 conducts the channel II 15 and the channel VI 19;

the oil return valve core 28 is movably arranged at the bottom of the oil return cavity 22 and is used for blocking the conduction between the fourth channel 17 and the oil return cavity 22;

under the action of the hydraulic oil difference, the oil return valve core 28 is driven to move in the oil return cavity 22, so that the oil return channel 27 is conducted or closed.

After the design, other triggering devices are not required to be designed, the control of the oil return assembly 12 can be realized through the internal oil pressure, and the whole design is simple and the use is convenient.

The oil return spool 28 includes at least:

the stem 29 is movably arranged at the bottom of the oil return cavity 22, and a gap between the stem 29 and the side wall of the oil return cavity 22 is sealed by a sealing ring;

a core ball 30 movably disposed between the core post 29 and the oil return seat 26;

by the movement of the stem 29, it is achieved that the core ball 30 seals or opens the trumpet-shaped outlet opening 31 of the oil return channel 27.

The above oil control assembly 11 has the following structure:

the oil control assembly 11 has at least:

an oil control valve core 32 movably disposed in the oil control chamber 21;

an oil control valve seat 33 screwed into the oil control chamber 21;

a first return spring 34 movably arranged in the oil control cavity 21, and the ends of the first return spring are respectively abutted against the oil control valve core 32 and the oil control valve seat 33;

the oil control valve core 32 blocks the oil inlet end of the oil control cavity 21 under the action of the first return spring 34.

In order to protect the pump body 5, a sealing sleeve 35 is arranged in the oil inlet end of the oil control cavity 21, and the oil control valve core 32 is movably abutted to the end part of the sealing sleeve 35 for sealing.

Only the sealing sleeve 35 needs to be replaced after the abrasion, and the pump body 5 does not need to be replaced, so that the cost is saved.

The speed reducing eccentric assembly is also in the prior art, and is characterized in that an oil seal is sleeved on the eccentric shaft for preventing oil from entering the shell.

The structure of the hydraulic device 2 is as follows:

the hydraulic device mainly comprises a spring seat and a piston, wherein the spring seat is in threaded connection with the front end of the pump body 5 and is matched with the pump body 5 to form a hydraulic cavity 23, the rear end of the piston is arranged in the hydraulic cavity 23, and the hydraulic device 2 is of conventional design and is not unfolded in detail.

The oil box mechanism 8 has the following structure:

the oil storage device mainly comprises an oil box I and an oil box II, wherein the oil box I is made of flexible materials, the oil box I is arranged in the oil box II, the oil box II is fixed on the pump body 5, the oil storage cavity 9 is formed between the oil box I and the end face of the pump body 5, and when oil in the oil storage cavity 9 is sucked out, the oil box I can deform.

An oil seat can be arranged at the lower end of the pump body 5, the oil seat and the pump body 5 jointly form a plunger cavity 6, the oil seat is internally provided with a channel eight 20, and an oil inlet one-way valve and an oil outlet one-way valve are respectively arranged at two ends of the channel eight 20 and are used for being matched with a plunger mechanism 7.

The foregoing shows and describes the basic principles and main features of the present technical solution and the advantages of the present technical solution. It will be appreciated by persons skilled in the art that the present utility model is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of protection of the technical solution is defined by the appended claims and equivalents thereof.

Claims

1. An electro-hydraulic tool, comprising:

an oil pump device (1);

a hydraulic device (2) which is mounted at the front end of the oil pump device (1) and is used for mounting the working head (3);

a driving device (4) which is installed at the rear end of the oil pump device (1) and is used for driving a plunger mechanism (7) of the oil pump device (1) to work;

the driving device (4) supplies oil to the hydraulic device (2) through the oil pump device (1) to drive the working head (3) to work;

wherein the oil pump device (1) comprises:

a pump body (5) is provided with a plunger cavity (6), and a plunger mechanism (7) is arranged in the plunger cavity (6);

the oil box mechanism (8) is arranged at the lower side of the pump body (5) and is arranged at the outer side of the shell of the driving device (4), and is matched with the pump body (5) to form an oil storage cavity (9);

and the hydraulic circuit (10) is arranged in the pump body (5) and is used for realizing the circulating flow of hydraulic oil in the oil box mechanism (8) -the pump body (5) -the hydraulic device (2).

2. The electro-hydraulic tool of claim 1, wherein:

the hydraulic circuit (10) includes:

the oil control assembly (11) is arranged in the oil control cavity (21) of the pump body (5) and is used for controlling the conduction between the oil control cavity (21) and the plunger cavity (6) in the oil pump device (1);

the oil return assembly (12) is arranged in an oil return cavity (22) of the pump body (5) and used for controlling the conduction between the oil control cavity (21) and an eccentric cavity (13) in the pump body (5), and the eccentric cavity (13) is conducted with the oil storage cavity (9);

when the driving device (4) drives the plunger mechanism (7) to work, the oil return assembly (12) cuts off the conduction between the oil control cavity (21) and the eccentric cavity (13) in the pump body (5) under the action of oil pressure, and meanwhile, the oil control cavity (21) is conducted with the plunger cavity (6) in the oil pump device (1) to supply oil to the hydraulic device (2);

when the driving device (4) stops driving the plunger mechanism (7) to work, the oil control assembly (11) cuts off conduction between the oil control cavity (21) and the plunger cavity (6) in the oil pump device (1), meanwhile, the oil control cavity (21) is conducted with the eccentric cavity (13) in the pump body (5), and at the moment, oil in the hydraulic device (2) flows into the eccentric cavity (13) and finally flows back to the oil storage cavity (9).

3. The electro-hydraulic tool of claim 2, wherein:

an oil return cavity (22), an oil control cavity (21) and the eccentric cavity (13) are formed in the pump body (5);

the oil control cavity (21) is communicated with the plunger cavity (6) through the first channel (14);

the oil return cavity (22) is communicated with the eccentric cavity (13) through a second channel (15);

the oil control cavity (21) is communicated with a hydraulic cavity (23) of the hydraulic device (2) through a channel III (16);

the oil return cavity (22) is communicated with the plunger cavity (6) through a channel IV (17);

the oil return cavity (22) is communicated with the oil control cavity (21) through a channel six (19).

4. The electro-hydraulic tool of claim 3, wherein:

a safety cavity (24) for installing a safety valve (25) is also formed in the pump body (5);

the fourth channel (17) is communicated with a safety cavity (24), and the safety cavity (24) is communicated with the eccentric cavity (13) through the fifth channel (18).

5. The electrohydraulic tool of claim 3 or 4, wherein:

the oil return assembly (12) has at least:

an oil return seat (26) is provided with an oil return channel (27), and the oil return channel (27) is communicated with a second channel (15) and a sixth channel (19);

the oil return valve core (28) is movably arranged at the bottom of the oil return cavity (22) and is used for blocking the conduction between the fourth channel (17) and the oil return cavity (22);

under the action of hydraulic oil difference, the oil return valve core (28) is driven to move in the oil return cavity (22), so that the oil return channel (27) is conducted or closed.

6. The electro-hydraulic tool of claim 5, wherein:

the oil return valve core (28) at least comprises:

the core column (29) is movably arranged at the bottom of the oil return cavity (22), and a gap between the core column (29) and the side wall of the oil return cavity (22) is sealed by a sealing ring;

the core ball (30) is movably arranged between the core column (29) and the oil return seat (26);

through the movement of the core column (29), the sealing of the core ball (30) or the conduction of the horn-shaped oil outlet (31) of the oil return channel (27) are realized.

7. The electro-hydraulic tool as set forth in any one of claims 2-4, wherein:

the oil control assembly (11) has at least:

an oil control valve core (32) which is movably arranged in the oil control cavity (21);

an oil control valve seat (33) which is in threaded connection with the oil control cavity (21);

the first return spring (34) is movably arranged in the oil control cavity (21), and the end parts of the first return spring are respectively abutted against the oil control valve core (32) and the oil control valve seat (33);

the oil control valve core (32) is used for blocking the oil inlet end of the oil control cavity (21) under the action of the first return spring (34).

8. The electro-hydraulic tool of claim 7, wherein:

the oil inlet end of the oil control cavity (21) is internally provided with a sealing sleeve (35), and the oil control valve core (32) is movably abutted to the end part of the sealing sleeve (35) for sealing.