CN219170808U

CN219170808U - Electric hydraulic tool

Info

Publication number: CN219170808U
Application number: CN202223296259.4U
Authority: CN
Inventors: 朱潇清
Original assignee: Yuhuan Fengwei Hydraulic Tools Co ltd
Current assignee: Yuhuan Fengwei Hydraulic Tools Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-13
Anticipated expiration: 2032-12-09

Abstract

The utility model provides an electric hydraulic tool, and belongs to the technical field of machinery. It has solved the not high problem of current electric hydraulic tool machining efficiency. The electric hydraulic tool comprises a cylinder body, wherein one end of the cylinder body is connected with an oil bag, the other end of the cylinder body is a piston cavity, the middle part of the cylinder body is provided with an installation cavity, the cylinder body is provided with a communication hole for communicating the oil bag and the installation cavity, the cylinder body is further provided with an oil inlet hole for communicating the piston cavity and the installation cavity, the installation cavity is in threaded connection with a guide sleeve, an ejector rod is axially penetrated through the guide sleeve, a first spring and a core are arranged in the installation cavity, the cylinder body is connected with a driving mechanism for driving the ejector rod to axially push against the core in a reciprocating manner, the number of the oil inlet holes is two, one of the oil inlet holes is communicated between the bottom of the installation cavity and the core, and the other oil inlet hole is communicated between the core and the guide sleeve. The utility model has the advantages of high processing efficiency and the like.

Description

Electric hydraulic tool

Technical Field

The utility model belongs to the technical field of machinery, relates to a hydraulic tool, and in particular relates to an electric hydraulic tool.

Background

The electric hydraulic tool comprises an electric hydraulic wire pressing clamp, an electric hydraulic shearing and expanding clamp, an electric hydraulic crimping clamp and the like, and generally comprises a motor, an oil storage cavity, a hydraulic cylinder, a switch assembly and a control valve, wherein a reset spring and a piston rod are arranged in the hydraulic cylinder, and the outer end of the piston rod is fixedly connected with a working end.

For example, chinese patent literature discloses an electro-hydraulic tool [ application number: 201220733158.6; authorized bulletin number: CN202985531U ], it includes the body and is located the hydraulic pressure work end on the body, have hydro-cylinder and oil storage chamber in the body, be linked together through the oil circuit between hydro-cylinder and the oil storage chamber, still have the pressurizing mechanism that can impress the power in the oil storage chamber in the hydro-cylinder on the body, hydraulic pressure work end is located the hydro-cylinder, has the oil drain hole that is linked together oil storage chamber and hydro-cylinder on the body, still have on the body when it opens the switch module that enables pressurizing mechanism action, have between switch module and the oil drain hole and can be with the end cap spare of oil drain hole closure when switch module opens.

The electric hydraulic tool can conveniently maintain pressure or relieve pressure of pressure oil in the oil cylinder through the arrangement of the plug part, is convenient to use, but is low in oil inlet efficiency, so that the piston rod and the hydraulic working end act not fast, and the machining efficiency is influenced.

Disclosure of Invention

The present utility model has been made in view of the above problems occurring in the prior art, and an object of the present utility model is to provide an electro-hydraulic tool with high machining efficiency.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides an electronic hydraulic tool, includes the cylinder body, the one end of cylinder body is connected with the oil bag, the other end of cylinder body is the piston chamber, the middle part of cylinder body has the installation cavity, the cylinder body have the intercommunicating pore in intercommunication oil bag and installation cavity, the cylinder body still have the inlet port of intercommunication piston chamber and installation cavity, the oral area threaded connection of installation cavity have the uide bushing, the uide bushing axial wear to be equipped with the ejector pin, the installation cavity in be equipped with spring one and core, spring one provide elasticity and make the core have the trend of contradicting in the uide bushing inner, the cylinder body be connected with the actuating mechanism that drives the reciprocal axial roof pressure core of ejector pin, its characterized in that, the quantity of inlet port be equipped with the check valve to the one-way oil feed of piston chamber in two and two inlet ports, one of them inlet port communicates between installation cavity bottom and core, another inlet port communicates between core and uide bushing.

In the electric hydraulic tool, the core is provided with a plurality of oil holes which are axially communicated, the core is provided with a turned edge which is turned towards the bottom side of the installation cavity, the turned edge is in clearance fit with the inner wall of the installation cavity, the core is provided with a limiting rod, the limiting rod is provided with a stop shoulder which radially protrudes outwards and is used for the first spring to abut against, the limiting rod is provided with a limiting part which axially extends and is inserted into the center of the core, and the bottom of the installation cavity is provided with a limiting groove for the first end part of the first spring to be inserted.

In the electric hydraulic tool, the one-way valve comprises the steel ball, the second spring and the valve cover, the valve cover is provided with the through hole which is axially penetrated, the valve cover is in threaded connection with the oil inlet hole, the second spring is positioned between the valve cover and the steel ball, the oil inlet hole is provided with the step for sealing the steel ball, and the second spring provides elasticity to enable the steel ball to always have a trend of sealing in the step.

In the electric hydraulic tool, the first sealing ring sealed on the cylinder body is sleeved outside the guide sleeve, and the second sealing ring is embedded in the inner wall of the guide sleeve.

In the above-mentioned electric hydraulic tool, the actuating mechanism include motor, reduction gear and camshaft, the motor link firmly in the cylinder body lateral part, the output shaft of motor is connected with the input of reduction gear, the output of reduction gear is connected with the camshaft, the cam overcoat that the camshaft has the bearing, the outer lane of bearing conflict in the outer end that the ejector pin stretches out the uide bushing and radial evagination.

In the electric hydraulic tool, the oil return cavity is arranged in the cylinder body, the oil return hole communicated with the piston cavity and the oil return cavity is arranged in the cylinder body, the oil passing plate is connected with the oil return hole through threads at the communication position of the oil return hole and the oil return cavity, the sealing gasket sealed in the cylinder body is sleeved outside the oil passing plate, the oil passing hole is axially penetrated through the oil passing plate, the oil return cavity is connected with the sealing cover through threads, the sealing cover axially penetrates through the oil drain rod, the piston block is sleeved outside the oil drain rod, the sealing ring III sealed on the inner wall of the oil return cavity is embedded in the piston block, the sealing ring III is arranged at the inner end of the oil drain rod, the sealing head is provided with a conical sealing head, the outer wall at the inner end is provided with a radially outwards protruding retaining ring, one end of the spring III is abutted against the sealing cover, the other end of the spring III is abutted against the piston block, the spring III provides elasticity to enable the piston block to be abutted against the retaining ring and enable the sealing head to be sealed on the oil passing hole, and the cylinder body is provided with the oil drain hole communicated with the oil return cavity and the oil bag.

In the electric hydraulic tool, the number of the oil leakage holes is two, the cylinder body is provided with the pressure discharge holes communicated with the oil return cavity area between the oil passing plate and the piston block, the outer ends of the pressure discharge holes are communicated with the oil leakage holes close to the oil passing holes, the cylinder body is in threaded connection with the electromagnetic valve, the end part of the valve rod of the electromagnetic valve is provided with the plug in a pointed cone shape, the valve rod of the electromagnetic valve is sleeved with the spring IV, one end of the spring IV is abutted against the valve body of the electromagnetic valve, the other end of the spring IV is abutted against the plug, and the spring IV provides elasticity to enable the plug to have a trend of being sealed at the outer end of the pressure discharge holes.

Compared with the prior art, the electric hydraulic tool has the advantages of high oil inlet efficiency, continuous oil inlet function and high processing efficiency.

Drawings

Fig. 1 is a schematic sectional view of the structure of the present electro-hydraulic tool.

Fig. 2 is a schematic cross-sectional view of the present electro-hydraulic tool at another angle.

In the figure, 1, a cylinder body; 2. an oil bag; 3. a piston chamber; 4. a communication hole; 5. an oil inlet hole; 6. a guide sleeve; 7. a push rod; 8. a first spring; 9. a core; 91. flanging; 10. a one-way valve; 101. steel balls; 102. a second spring; 103. a valve cover; 11. oil holes; 12. a limit rod; 13. a first sealing ring; 14. a second sealing ring; 15. a motor; 16. a speed reducer; 17. a cam shaft; 18. a bearing; 19. an oil return cavity; 20. an oil return hole; 21. an oil passing plate; 211. an oil passing hole; 22. a sealing gasket; 23. a cover; 24. a drain rod; 241. a sealing head; 242. a retainer ring; 25. a piston block; 26. a third sealing ring; 27. a third spring; 28. an oil drain hole; 29. a pressure discharge hole; 30. an electromagnetic valve; 31. a plug; 32. and a spring IV.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 and 2, the electric hydraulic tool comprises a cylinder body 1, one end of the cylinder body 1 is connected with an oil bag 2, the other end of the cylinder body 1 is a piston cavity 3, an installation cavity is arranged in the middle of the cylinder body 1, the cylinder body 1 is provided with a communication hole 4 for communicating the oil bag 2 with the installation cavity, the cylinder body 1 is also provided with an oil inlet hole 5 for communicating the piston cavity 3 with the installation cavity, the opening of the installation cavity is in threaded connection with a guide sleeve 6, a push rod 7 is axially penetrated through the guide sleeve 6, a first spring 8 and a core 9 are arranged in the installation cavity, the first spring 8 provides an elastic force to enable the core 9 to have a trend of abutting against the inner end of the guide sleeve 6, the cylinder body 1 is connected with a driving mechanism for driving the push rod 7 to axially push the core 9 in a reciprocating manner, one-way valves 10 for unidirectional oil inlet to the piston cavity 3 are arranged in the two oil inlet holes 5, one oil inlet hole 5 is communicated between the bottom of the installation cavity and the core 9, and the other oil inlet hole 5 is communicated between the core 9 and the guide sleeve 6.

When the oil bag 2 of the electric hydraulic tool is used for storing hydraulic oil, the driving mechanism drives the ejector rod 7 to axially push against the core 9 in a reciprocating mode, when the elastic force of the first spring 8 enables the core 9 to reset, the core 9 presses hydraulic oil entering from the communication hole 4 into the oil inlet hole 5 between the core 9 and the guide sleeve 6, the one-way valve 10 in the oil inlet hole 5 is used for supplying the hydraulic oil to enter the piston cavity 3, when the core 9 overcomes the elastic force of the first spring 8 and axially displaces towards the bottom side of the installation cavity, the core 9 presses residual hydraulic oil in the installation cavity into the oil inlet hole 5 between the bottom of the installation cavity and the core 9, the one-way valve 10 in the oil inlet hole 5 is used for supplying the hydraulic oil to enter the piston cavity 3, and thus the core 9 can press the hydraulic oil at the installation cavity into the piston cavity 3 in two processes of pressing in and resetting, so that the oil inlet efficiency is improved, and the machining efficiency is improved.

Further, the core 9 has two axially through and symmetrical oil holes 11, the core 9 has a flange 91 turned to the bottom of the installation cavity, the flange 91 is in clearance fit with the inner wall of the installation cavity, the core 9 is provided with a limit lever 12, the limit lever 12 has a shoulder protruding radially and abutting against the first spring 8, the limit lever 12 has a limit part extending axially and inserted into the center of the core 9, and the bottom of the installation cavity has a limit groove for inserting the end of the first spring 8. Through the setting of spacing groove and gag lever post 12 for spring 8 is radial spacing, and spring 8 job stabilization nature is good, and oil feed rate is big for the hydraulic oil of installation cavity department to enter into between core 9 and the uide bushing 6 fast, has improved oil feed efficiency and machining efficiency.

The one-way valve 10 comprises a steel ball 101, a second spring 102 and a valve cover 103, wherein the valve cover 103 is provided with an axial through hole, the valve cover 103 is in threaded connection with the oil inlet hole 5, the second spring 102 is positioned between the valve cover 103 and the steel ball 101, the oil inlet hole 5 is provided with a step for the steel ball 101 to seal, and the second spring 102 provides elasticity to enable the steel ball 101 to always have a trend of sealing in the step. The structure is simple, the second spring 102 enables the steel ball 101 to plug the oil inlet hole 5 in one direction, when hydraulic oil overcomes the elasticity of the second spring 102, the steel ball 101 is separated from the step, the hydraulic oil enters the oil inlet hole 5 and flows into the piston cavity 3 from the through hole of the valve cover 103.

The guide sleeve 6 is sleeved with a first sealing ring 13 sealed on the cylinder body 1, and a second sealing ring 14 is embedded in the inner wall of the guide sleeve 6. The sealing performance between the guide sleeve 6 and the cylinder body 1 is guaranteed by the first sealing ring 13, the sealing performance between the guide sleeve 6 and the ejector rod 7 is guaranteed by the second sealing ring 14, the second sealing ring 14 is in a straight cylinder shape in the embodiment, the contact area is large, the sealing performance is good, the second sealing ring 14 is located on the inner wall of the guide sleeve 6 and is different from the arrangement embedded in the ejector rod 7 in the past, so that the electric loss can be reduced, and the working time is prolonged.

The driving mechanism comprises a motor 15, a speed reducer 16 and a cam shaft 17, wherein the motor 15 is fixedly connected to the side part of the cylinder body 1, an output shaft of the motor 15 is connected with an input end of the speed reducer 16, an output end of the speed reducer 16 is connected with the cam shaft 17, a cam sleeve arranged on the cam shaft 17 is sleeved with a bearing 18, and an outer ring of the bearing 18 is abutted against an outer end of the ejector rod 7, which extends out of the guide sleeve 6 and radially protrudes outwards. The speed reducer 16 is in the prior art, and will not be described in detail herein, the output shaft of the motor 15 drives the speed reducer 16 to work, the speed reducer 16 drives the cam shaft 17 to rotate, and the cam drives the bearing 18 to rotate, so that the ejector rod 7 is axially and reciprocally pushed and pressed, and the ejector rod 7 is axially and reciprocally displaced.

The cylinder body 1 is internally provided with an oil return cavity 19, the cylinder body 1 is internally provided with an oil return hole 20 communicated with the piston cavity 3 and the oil return cavity 19, the oil return hole 20 is in threaded connection with an oil passing plate 21 at the communication part of the oil return hole 20 and the oil return cavity 19, a sealing pad 22 sealed on the cylinder body 1 is sleeved outside the oil passing plate 21, the oil passing plate 21 axially penetrates through the oil passing hole 211, the oil return cavity 19 is in threaded connection with a sealing cover 23, the sealing cover 23 axially penetrates through an oil drain rod 24, the oil drain rod 24 is sleeved with a piston block 25, the piston block 25 is embedded with a sealing ring III 26 sealed on the inner wall of the oil return cavity 19, the inner end of the oil drain rod 24 is provided with a conical sealing head 241, the outer wall at the inner end is provided with a radially outwards protruding check ring 242, one end of the oil drain rod 24 is sleeved with a spring III 27, one end of the spring III 27 is abutted against the sealing cover 23, the other end of the spring III 27 is abutted against the piston block 25, the spring III 27 provides elasticity to enable the piston block 25 to be abutted against the check ring 242 and enable the sealing head 241 to be sealed on the oil passing hole 211, and the cylinder body 1 is provided with an oil drain hole 28 communicated with the oil return cavity 19 and the oil pocket 2. When the hydraulic oil in the piston cavity 3 reaches a set pressure value, the pressure of the hydraulic oil in the oil return hole 20 overcomes the elasticity of the third spring 27, so that the sealing head 241 is separated from the oil passing hole 211, the oil drain rod 24 and the piston block 25 are axially displaced towards the sealing cover 23 side, the oil drain hole 28 is communicated with the oil return cavity 19, the hydraulic oil in the piston cavity 3 enters the oil return cavity 19 through the oil return hole 20 and the oil passing hole 211, and then enters the oil bag 2 through the oil drain hole 28.

The quantity of oil drain hole 28 is two, cylinder body 1 has the pressure discharge hole 29 that communicates in the oil return chamber 19 region between oil passing plate 21 and piston piece 25, the outer end of pressure discharge hole 29 communicates in the oil drain hole 28 that is close to its setting, cylinder body 1 threaded connection has solenoid valve 30, the valve rod tip of solenoid valve 30 has the end cap 31 that is the pointed cone form, the valve rod overcoat of solenoid valve 30 has four springs 32, the one end of four springs 32 is contradicted in solenoid valve 30's valve body, the other end of four springs 32 is contradicted in end cap 31, four springs 32 provide elasticity and make end cap 31 have the trend of sealing in pressure discharge hole 29 outer end.

The plug 31 is sealed at the outer end of the pressure discharge hole 29 at ordinary times, the two oil discharge holes 28 enable oil discharge to be thorough, the electromagnetic valve 30 and the motor 15 are controlled by the same linkage switch, in the oil return process, when the working end of the hydraulic tool meets the condition of workpiece placement, the linkage switch is pressed, the electromagnetic valve 30 works, the elasticity of the spring four 32 is overcome, the valve rod moves outwards, the plug 31 is separated from the outer end of the pressure discharge hole 29, then the electromagnetic valve 30 is rapidly closed, the outer end of the pressure discharge hole 29 is communicated with the oil discharge hole 28 in the short time of opening and closing the electromagnetic valve 30, high-pressure oil is rapidly discharged to the oil bag 2, the pressure in the oil return cavity 19 is instantaneously reduced, the pressure of hydraulic oil in the oil return hole 20 is smaller than the elasticity of the spring three 27, the spring three 27 provides elasticity to enable the piston block 25 to drive the sealing head 241 of the oil discharge rod 24 to be sealed at the oil passing hole 211 again, meanwhile, the motor 15 is opened, hydraulic oil in the oil bag 2 is fed into the oil inlet hole 5 to perform pressurizing work again, oil supply time is shortened, and machining efficiency is improved.

What is not described in detail in this specification is prior art known to those skilled in the art. The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides an electronic hydraulic tool, includes cylinder body (1), the one end of cylinder body (1) is connected with oil bag (2), the other end of cylinder body (1) is piston chamber (3), the middle part of cylinder body (1) has the installation cavity, cylinder body (1) have intercommunication oil bag (2) and installation cavity's intercommunicating pore (4), cylinder body (1) still have intercommunication piston chamber (3) and installation cavity's inlet port (5), installation cavity's oral area threaded connection have uide bushing (6), uide bushing (6) axial wear to be equipped with ejector pin (7), the installation cavity in be equipped with spring one (8) and core (9), spring one (8) provide elasticity and make core (9) have the trend of contradicting in uide bushing (6) inner, cylinder body (1) be connected with the actuating mechanism that drives ejector pin (7) reciprocal axial roof pressure core (9), its characterized in that, quantity of inlet port (5) be equipped with two and two inlet port (5) in advance to piston chamber (3) advance oil valve (10), one of which is in advance between core (5) and one of them (5) intercommunication between core (5) and the one-way valve (9).

2. An electrohydraulic tool according to claim 1, characterized in that the core (9) has a plurality of through holes (11) penetrating axially, the core (9) has a flange (91) turned over to the bottom side of the installation cavity, the flange (91) is in clearance fit with the inner wall of the installation cavity, the core (9) is provided with a limit lever (12), the limit lever (12) has a shoulder protruding radially outwards and abutting against the first spring (8), the limit lever (12) has a limit part extending axially and inserted into the center of the core (9), and the bottom of the installation cavity has a limit groove for inserting the end of the first spring (8).

3. The electric hydraulic tool according to claim 2, wherein the one-way valve (10) comprises a steel ball (101), a second spring (102) and a valve cover (103), the valve cover (103) is provided with an axially-through hole, the valve cover (103) is in threaded connection with the oil inlet hole (5), the second spring (102) is positioned between the valve cover (103) and the steel ball (101), the oil inlet hole (5) is provided with a step for sealing the steel ball (101), and the second spring (102) provides elastic force to enable the steel ball (101) to always have a trend of sealing the step.

4. An electro-hydraulic tool according to claim 3, wherein the guide sleeve (6) is sleeved with a first sealing ring (13) sealed to the cylinder body (1), and a second sealing ring (14) is embedded in the inner wall of the guide sleeve (6).

5. An electrohydraulic tool according to claim 1, 2, 3 or 4, characterized in that said driving mechanism comprises a motor (15), a reducer (16) and a cam shaft (17), said motor (15) is fixedly connected to the side of the cylinder (1), the output shaft of said motor (15) is connected to the input end of said reducer (16), the output end of said reducer (16) is connected to the cam shaft (17), the cam shaft (17) has a cam housing with a bearing (18), said bearing (18) has an outer ring which abuts against the outer end of the ejector rod (7) extending beyond the guide sleeve (6) and protruding radially.

6. The electric hydraulic tool according to claim 5, wherein the oil return cavity (19) is arranged in the cylinder body (1), the oil return hole (20) communicated with the piston cavity (3) and the oil return cavity (19) is arranged in the cylinder body (1), the oil passing plate (21) is connected with the oil return hole (20) and the oil return cavity (19) at the communicating position in a threaded manner, the sealing gasket (22) sealed in the cylinder body (1) is sleeved outside the oil passing plate (21) and the oil passing plate (21) axially penetrates through the oil passing hole (211), the oil return cavity (19) is connected with the sealing cover (23) in a threaded manner, the sealing cover (23) axially penetrates through the oil release rod (24), the sealing rod (24) is sleeved with the piston block (25) and the piston block (25) is embedded with the sealing ring III (26) sealed on the inner wall of the oil return cavity (19), the inner end of the oil release rod (24) is provided with the conical sealing head (241) and the outer wall at the inner end is provided with the radial outwards protruding retainer ring (242), the oil release rod (24) is sleeved with the spring III (27) and the spring 27) is abutted against the sealing cover III (27) at one end of the piston block (27), the spring III (27) provides elasticity to enable the piston block (25) to abut against the check ring (242) and enable the sealing head (241) to be sealed on the oil passing hole (211), and the cylinder body (1) is provided with an oil draining hole (28) communicated with the oil returning cavity (19) and the oil bag (2).

7. The electric hydraulic tool according to claim 6, wherein the number of the oil drain holes (28) is two, the cylinder body (1) is provided with a pressure drain hole (29) communicated with an oil return cavity (19) area between the oil passing plate (21) and the piston block (25), the outer end of the pressure drain hole (29) is communicated with the oil drain hole (28) arranged close to the oil drain hole, the cylinder body (1) is in threaded connection with the electromagnetic valve (30), the end part of a valve rod of the electromagnetic valve (30) is provided with a plug (31) in a pointed cone shape, a valve rod of the electromagnetic valve (30) is sleeved with a spring four (32), one end of the spring four (32) is abutted against a valve body of the electromagnetic valve (30), and the other end of the spring four (32) is abutted against the plug (31), and the spring four (32) provides elasticity to enable the plug (31) to have a trend of being sealed at the outer end of the pressure drain hole (29).