CN114738266B - An electric hydraulic tool - Google Patents
An electric hydraulic tool Download PDFInfo
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- CN114738266B CN114738266B CN202210398538.7A CN202210398538A CN114738266B CN 114738266 B CN114738266 B CN 114738266B CN 202210398538 A CN202210398538 A CN 202210398538A CN 114738266 B CN114738266 B CN 114738266B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
本发明涉及电动液压工具技术领域，特指一种电动液压工具，包括：驱动装置，其用于提供动力；油泵装置，该油泵装置包括泵体和供油机构；以及执行装置，其连接油泵装置；以及控油装置，其安装在油泵装置上，且前端置于执行装置内；其中，所述的供油机构包括：供油座，其内部开设有进油口、出油通道一和柱塞腔；至少两组柱塞机构，其安装在柱塞腔内；以及连接件，用于连接偏心轴；偏心轴上设置有偏心部；偏心轴的转动，转换为连接件在设定方向上的往复移动；所述连接件在该设定方向上的两侧分别连接柱塞机构。本发明具有运行稳定，故障率低，保证使用效率和使用寿命等。
The present invention relates to the technical field of electric hydraulic tools, and in particular to an electric hydraulic tool, comprising: a driving device for providing power; an oil pump device, the oil pump device comprising a pump body and an oil supply mechanism; and an actuator, which is connected to the oil pump device; and an oil control device, which is installed on the oil pump device, and the front end is placed in the actuator; wherein the oil supply mechanism comprises: an oil supply seat, which is provided with an oil inlet, an oil outlet channel and a plunger cavity; at least two groups of plunger mechanisms, which are installed in the plunger cavity; and a connecting piece, which is used to connect an eccentric shaft; an eccentric part is provided on the eccentric shaft; the rotation of the eccentric shaft is converted into a reciprocating movement of the connecting piece in a set direction; the connecting piece is respectively connected to the plunger mechanism on both sides of the set direction. The present invention has stable operation, low failure rate, guaranteed use efficiency and service life, etc.
Description
Technical Field
The invention relates to the technical field of electric hydraulic tools, in particular to an electric hydraulic tool.
Background
Electrohydraulic tools come in a variety of types such as punch, guillotine, crimp pliers, and the like. A complete hydraulic tool system consists of five parts, namely a power element, an actuator element, a control element, an auxiliary element and hydraulic oil.
The existing hydraulic tool, for example, china patent 201020529262.4, discloses a hand-held steel bar quick breaker, which mainly comprises a rechargeable battery, a direct current motor, a speed regulation switch, a hydraulic cylinder body, a piston rod and a blade, wherein a high-pressure plunger pump, an overflow valve and a one-way valve are arranged in the hydraulic cylinder body, the blade is connected with the piston rod, the blade is made of alloy steel or high-speed steel, the direct current motor is powered by the rechargeable battery, the direct current motor is connected with the hydraulic cylinder body through a coupling, the high-pressure plunger pump in the hydraulic cylinder body is driven when the direct current motor rotates, hydraulic fluid with the pressure of 63MPa is generated, the piston rod is driven to do forward motion, and a cut object is sheared off when the piston rod drives the blade to forward.
However, the prior art has the following problems
1. The existing piston assembly is designed by utilizing a piston cap and a spring, and after long-time use, the spring is broken or fails, so that the whole machine cannot work or is low in efficiency, for example, the hydraulic effect is poor, and even scraps are generated after the spring is broken, and the scraps enter an oil duct to cause blockage.
2. When the device is used, as the metal has certain elasticity, the device can retract, the die is clamped and clamped easily, the device cannot be reset, the normal use of the device is affected, and the efficiency is affected.
3. The relative fixed angle of the grip and the handle of the equipment is unchanged, can not be adjusted according to the use scene or the use habit, and is inconvenient to use.
Disclosure of Invention
The invention aims to provide an electric hydraulic tool which is convenient to use and compact in structure.
The purpose of the invention is realized in the following way:
An electro-hydraulic tool comprising:
A driving device for providing power;
an oil pump device including a pump body and an oil supply mechanism, and
An actuator connected to the oil pump device, and
The oil control device is arranged on the oil pump device, and the front end of the oil control device is arranged in the execution device;
Wherein, the oil supply mechanism includes:
the oil supply seat is internally provided with an oil inlet, an oil outlet channel I and a plunger cavity;
at least two sets of plunger mechanisms mounted within the plunger cavity, and
The connecting piece is used for connecting the eccentric shafts;
the eccentric shaft is provided with an eccentric part, and the rotation of the eccentric shaft is converted into the reciprocating movement of the connecting piece in the set direction;
the two sides of the connecting piece in the setting direction are respectively connected with the plunger mechanism.
Preferably, the plunger mechanism has at least:
A plunger rod having a rear end connected to the connector and a front end inserted into the corresponding plunger cavity;
The rotation of the eccentric shaft drives the end parts of at least two plunger rods to alternately reciprocate in the plunger cavity.
Preferably, the connecting member is a ring member to which the rear end of the plunger rod is connected, and the end of the eccentric shaft is disposed within the ring member and movably abuts the rear end or the inner wall of the ring member of the plunger rod.
Preferably, the end surface of the oil supply seat is formed with a first limiting part, and the side wall of the annular element moves along the side wall of the first limiting part to limit the position of the annular element, so that the annular element moves along the axial direction of the plunger rod.
Preferably, the eccentric shaft is sleeved with a first gasket, and the first gasket is abutted against the end face of the connecting piece;
The end part of the first limiting part is provided with a first clamping groove, and the first clamping groove is clamped by the clamping piece to restrict the position of the first gasket, so that the position of the connecting piece is restricted.
Preferably, the oil control device has at least:
the rear end of the oil control valve core is arranged in an oil control column in the middle of the pump body, and an oil control channel capable of conducting the hydraulic cavity and the oil chamber is formed in the oil control valve core;
the oil control limiting plate is arranged at the end part of the piston of the executing device;
the end part of the oil control valve core is provided with an oil control plug for abutting against the front end of the sealed oil control column;
when the piston of the executing device moves to a set position, the oil control limiting plate pushes the oil control valve core, so that the oil control channel is conducted;
When the piston of the executing device is retracted to the second set position, the oil control valve core is forced to be pushed to close the oil control channel.
Preferably, a buffer spring I is sleeved outside the oil control plug, an oil control hole is formed in the middle of the oil control limiting plate, the front end of the oil control column penetrates through the oil control hole and is arranged in the piston, and the end part of the buffer spring I is movably abutted against the oil control limiting plate;
And a buffer spring II is sleeved on the oil control valve core, and the end part of the buffer spring II is respectively abutted against the oil control column and the oil control plug and is used for supporting the buffer oil control valve core.
Preferably, a hydraulic cavity is formed in the execution device, and a piston is arranged in the hydraulic cavity to divide the hydraulic cavity into a hydraulic extending cavity and a hydraulic retracting cavity;
an oil inlet channel is formed in the pump body, and comprises an oil inlet channel I and an oil inlet channel III communicated with the hydraulic stretching cavity;
A reset oil duct is formed in the pump body and is communicated with the hydraulic retraction cavity;
an oil passing part is formed on the outer wall of the lower end of the oil control valve core;
When the oil control valve core moves axially, the first oil inlet flow passage is switched to be communicated with the third oil inlet flow passage or the reset oil passage.
Preferably, the oil inlet flow passage I, the oil inlet flow passage III and the reset oil passage are distributed in the pump body along the moving direction of the oil control valve core.
Preferably, the outer wall of the lower end of the oil control valve core is provided with at least two oil passing parts, and the lower end of the oil control valve core is also provided with a second limiting part;
When the second limiting part abuts against the lower end face of the pump body, the oil passing part conducts the first oil inlet flow passage and the reset oil passage.
Compared with the prior art, the invention has the following outstanding and beneficial technical effects:
1. according to the scheme, a spring reset scheme in the prior art is canceled, and a connecting piece is adopted to drive a plunger mechanism to reciprocate, so that oil feeding and reset actions are realized. By adopting the scheme, the moving stability of the plunger mechanism can be ensured, the condition that the spring is broken or fails in the prior art does not exist, the running stability of the plunger mechanism can be ensured, the normal oil supply is ensured, higher hydraulic pressure can be provided, the generation of scraps can be reduced, the conditions that an oil way is blocked and a plunger cavity is scratched are reduced, and the service life is ensured.
2. The limiting part is mainly used for limiting the moving position of the connecting piece, ensuring the accuracy of the moving direction of the connecting piece, and further ensuring the working stability and the plunger effect of the plunger mechanism.
3. According to the invention, the clamping groove I is formed at the end part of the first limiting part, and the clamping part is clamped in the clamping groove I to restrain the position of the first gasket, so that the position of the connecting part is restrained, the connecting part is prevented from moving in the axial direction of the eccentric shaft, the axial shaking is reduced, and the stability and the precision of equipment are ensured.
4. The design of the oil control device can realize automatic oil return of equipment, automatic retraction of the piston can be realized without manual operation, the use is simpler, and the use efficiency is improved.
5. The buffer spring II can support the oil control plug due to continuous decline of oil pressure in the pressure release process, prevent the oil control channel from being closed when the pressure release is not completed, ensure smooth completion of the pressure release, and can buffer the upper end of the oil control column to which the oil control plug is abutted to avoid rapid collision, so that the problem that the sealing between the oil control plug and the end part of the oil control column is not tight and the hydraulic effect is affected due to unstable oil pressure in a hydraulic cavity is solved.
6. The structure of the active reset can realize the active reset of the piston, effectively avoid the condition of jamming, ensure the normal use of the equipment and ensure the use efficiency.
7. The reversing device can automatically adjust the included angle between the grip and the handle according to the use habit or the use scene of a user, and is convenient to use.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is an overall cross-sectional view of the present invention.
Fig. 3 is a schematic structural view of the oil supply mechanism and the plunger mechanism of the present invention.
Fig. 4 is a schematic top view of the oil supply mechanism and the plunger mechanism of the present invention.
Fig. 5 is an exploded view of the oil supply mechanism and the plunger mechanism of the present invention.
Fig. 6 is a cross-sectional view of the actuator of the present invention in a retracted state.
Fig. 7 is a state diagram of the piston of the present invention when extended to a set position.
Fig. 8 is a state diagram of the piston pushing the oil control valve core to move and opening the oil control channel.
FIG. 9 is a second partial cross-sectional view of the present invention.
Fig. 10 is an enlarged view of area a of fig. 7.
Fig. 11 is a schematic view of the bottom structure of the present invention.
Fig. 12 is a sectional view in the direction A-A of fig. 11.
Fig. 13 is an exploded view of the oil control device of the present invention.
Fig. 14 is a schematic end view of the pump body of the present invention.
Fig. 15 is a cross-sectional view in the direction C-C of fig. 14.
Fig. 16 is an exploded view of the reversing device of the present invention.
Fig. 17 is an enlarged view of the D area of fig. 2 in accordance with the present invention.
Fig. 18 is a cross-sectional view of the reversing device of the present invention.
Reference numerals:
100. Driving device, 101, eccentric shaft, 102, motor, 103, battery, 104, decelerator;
200. The oil pump comprises an oil pump device 201, a pump body 202, an oil chamber 203, an oil inlet channel 204, an oil supply mechanism 205, a plunger cavity 206, a plunger mechanism 207, a connecting piece 208, a plunger rod 209, a first limiting part 210, a first gasket 211, a first clamping groove 212, a clamping piece 213, a second gasket 214, an oil inlet channel I215, an oil inlet channel III 216, a reset oil channel 217, a pressure stabilizing oil channel 218, a first check valve 219, an oil supply seat 220, a plunger boss 221, a second check valve 222, a third check valve 223 and a needle bearing;
300. the device comprises an actuating device 301, a die seat 302, a piston 303, a hydraulic cavity 304, a hydraulic spring 305, a hydraulic extending cavity 306 and a hydraulic retracting cavity;
400. An oil control device; 401, an oil control valve core, 402, an oil control column, 403, an oil control channel, 404, an oil control limiting plate, 405, an oil control plug, 406, a first buffer spring, 407, an oil control hole, 408, a second buffer spring, 409, an oil passing part, 410 and a second limiting part;
500. The reversing device comprises a reversing device body 501, a handle body 502, a handle body 503, a connecting cover 504, a motor flange plate 505, a positioning mechanism 506, a positioning groove 507, a positioning piece 508, a positioning spring 509, a positioning hole 510, a constraint mechanism 511, a strip-shaped mounting groove 512, an arc-shaped elastic sheet 513, an arc-shaped boss 514, a connecting flange 515, a limiting edge 516, a movable gap 517 and a convex ring.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, an electro-hydraulic tool includes a driving device 100 for providing power, an oil pump device 200 for providing hydraulic oil, an actuating device 300 for driving a die to move, and an oil control device 400 for controlling the flow of hydraulic oil, the oil pump device 200 including a pump body 201, an oil supply mechanism 204, and a plunger mechanism 206.
The output end of the driving device 100 is connected with the oil pump device 200, the end part of the oil pump device 200 is connected with the execution device 300, the oil control device 400 is arranged in the execution device 300, and a die is arranged on the execution device 300 and is driven to move by the execution device 300, so that corresponding functional effects are realized.
The type of the die may be a crimping die, a scissors die for cutting metal, a punching die of a punching machine, or the like.
The preliminary working procedure is that the driving device 100 works to drive the oil pump device 200 to work, so that hydraulic oil flows into the executing device 300, thereby driving the moving die on the executing device 300 to move, and matching with the fixed die to realize corresponding work.
The driving device 100 mainly comprises a motor 102, a battery 103 and a speed reducer 104, wherein the output end of the speed reducer 104 is connected with an eccentric shaft 101, and the motor 102 works through the power provided by the battery 103 to realize the power output of the eccentric shaft 101 of the speed reducer 104.
As shown in fig. 3 to 5, the oil pump device 200 mainly comprises a pump body 201 and an oil supply mechanism 204, wherein the oil supply mechanism 204 comprises a connecting piece 207 and at least two groups of plunger mechanisms 206;
An oil chamber 202 is formed in the pump body 201, an oil supply mechanism 204 is installed in the oil chamber 202, and hydraulic oil is mainly stored in the oil chamber 202.
The pump body 201 is internally provided with an oil inlet channel 203 communicated with the execution device 300, the oil supply mechanism 204 is internally provided with a plunger cavity 205, and the plunger cavity 205 is communicated with the oil inlet channel 203 to realize that hydraulic oil can enter the hydraulic cavity 303 of the execution device 300 from the oil chamber 202.
The plunger mechanism 206 is installed in the oil supply mechanism 204, and when two groups are symmetrically installed, three groups are axially distributed at equal included angles, after the installation is completed, the rear end of the plunger mechanism 206 is connected with the connecting piece 207, the end part of the eccentric shaft 101 is arranged in the middle of the two groups or three groups or more groups of plunger mechanisms 206, namely, the inside of the connecting piece 207, and the connecting piece 207 is driven to reciprocate in the set direction through the rotation of the eccentric shaft 101, so that the plunger mechanism 206 is driven to reciprocate alternately, the flow of hydraulic oil is realized, the hydraulic pressure is generated, and the work is realized.
When the plunger mechanisms 206 are in 2 groups, the plunger mechanisms 206 are distributed on opposite sides of the connecting piece 207, and the set direction refers to the axial direction of the 2 plunger cavities 205.
When the plunger mechanism 206 is 3 or four groups, the plunger mechanism 206 is circumferentially distributed around the connecting member 207, and at this time, the rotational locus of the eccentric shaft, i.e., the annular direction, of the direction finger is set.
The existing piston 302 assembly is designed by utilizing a piston cap and a spring, the eccentric shaft 101 overcomes the elasticity of the spring to push the piston cap to move, and the spring is reset, so that oil is enabled to generate hydraulic pressure, the piston 302 is enabled to move, and the upper die is driven.
However, after long-time use, the spring is broken or the spring is invalid due to temperature rise, so that the whole machine cannot work or has low efficiency and other problems, such as poor hydraulic effect, and even the broken spring generates scraps and enters an oil duct to cause blockage.
In order to solve the above-mentioned problems, in the present embodiment, the plunger mechanism 206 and the oil supply mechanism 204 are modified as follows.
As shown in fig. 5, the oil supply mechanism 204 includes an oil supply seat 219, a plurality of plunger bosses 220 are convexly formed on a lower end surface of the oil supply seat 219, in this embodiment, two plunger bosses 220 are provided and symmetrically arranged, a plunger cavity 205 is horizontally formed in the plunger bosses 220, an oil inlet is formed in a side surface of the plunger bosses 220, the oil inlet conducts the oil chamber 202 and the plunger cavity 205, an oil outlet channel I is formed in the plunger bosses 220, the oil outlet channel I penetrates through an end surface of the oil supply seat 219, and the oil outlet channel I conducts the plunger cavity 205 and the oil inlet channel 203.
When the upper end surface of the oil supply seat 219 abuts against the lower end of the pump body 201, the oil outlet passage is connected with the oil inlet passage 203.
Meanwhile, a second check valve 221 is arranged at the position of the oil outlet channel, which is connected with the oil inlet channel 203, and a third check valve 222 is arranged at the position of the oil inlet.
The plunger mechanism 206 includes a plunger rod 208;
The connecting members 207 are disposed between the plunger bosses 220, the front ends of the plunger rods 208 are inserted into the corresponding plunger cavities 205, the rear ends of the plunger rods 208 are connected to the connecting members 207, and the connecting members 207 are connected to the eccentric shafts 101.
The rotation of the eccentric shaft 101 drives the plunger rod 208 to alternately reciprocate, so that the end of the plunger rod moves in the plunger cavity 205, and the second check valve 221 and the third check valve 222 are matched to drive hydraulic oil to flow for oil supply operation.
In the scheme of the application, the scheme of spring reset in the prior art is omitted, and the connecting piece 207 is adopted to drive the plunger rod 208 to reciprocate, so that the actions of oil feeding and reset are realized. By adopting the scheme, the stability of the plunger rod 208 moving can be ensured, the condition that the spring is broken or the spring fails in the prior art does not exist, the running stability of the plunger mechanism 206 can be ensured, the normal oil supply is ensured, higher hydraulic pressure can be provided, the generation of scraps can be reduced, the conditions of oil way blockage and scratch of the plunger cavity 205 are reduced, and the service life is ensured.
The specific connecting piece 207 may be a ring-shaped piece, the outline of the ring-shaped piece is close to square, and the included angle is in arc smooth transition.
The rear end of the plunger rod 208 is turned outwards to form a folded edge, the front end passes through the annular piece, the folded edge at the rear end abuts against the inner wall of the annular piece to realize connection between the plunger rod 208 and the connecting piece 207, both ends of the eccentric shaft 101 are fixed through bearings, so that eccentric parts are positioned between the annular pieces, meanwhile, a needle bearing 223 is sleeved at the eccentric parts, the eccentric shaft 101 drives the needle bearing 223 to move in the annular piece, in the moving process, at least one plunger rod 208 is abutted and pressed into the plunger cavity 205, hydraulic oil is driven, other plunger rods 208 corresponding to the inside are pulled out of the plunger cavity 205, and the reciprocating movement is alternately performed to realize hydraulic formation.
The existing springs are replaced by connecting pieces 207, so that the running stability and efficiency of the whole mechanism are ensured.
The needle bearing 223 can reduce wear and ensure a hydraulic effect.
As shown in fig. 5, in order to ensure that the connecting piece 207 always moves in the axial direction of the plunger cavity 205, a first limiting portion 209 is formed on two sides between the plunger bosses 220, and the side wall of the connecting piece 207 movably abuts against the inner side wall of the first limiting portion 209, where the first limiting portion 209 is mainly used for restricting the moving position of the connecting piece 207, ensuring the accuracy of the moving direction of the connecting piece 207, and further ensuring the working stability and the plunger effect of the plunger mechanism 206.
The first limiting portion 209 may be in the form of a boss, or a groove formed in the oil supply seat, or the like, so long as the movement position of the constraint link 207 can be achieved.
Meanwhile, a first washer 210 and a second washer 213 are sleeved on the eccentric shaft 101, the first washer 210 and the second washer 213 are respectively arranged at two ends of the connecting piece 207, the second washer 213 is arranged on the end face of the oil supply seat 219, on one hand, a bearing for fixing the end part of the eccentric shaft 101 is fixed, on the other hand, the contact between the needle bearing 223 and the connecting piece 207 and the oil supply seat 219 is isolated, abrasion to the oil supply seat 219 is reduced, and the service life and the use stability are guaranteed.
The first clamping groove 211 is formed at the end part of the first limiting part 209, the first clamping groove 211 is clamped by the clamping piece 212 to restrain the first gasket 210, so that the position of the connecting piece 207 is restrained, the connecting piece 207 is prevented from moving in the axial direction of the eccentric shaft 101, axial shaking is reduced, and the stability and the precision of equipment are ensured.
The snap spring used in this embodiment of the clip 212 may also be a pin.
The oil supply seat 219 is also provided with a magnet which is mainly used for absorbing metal impurities in hydraulic oil and avoiding the situation of blocking and scratching an oil way.
The outer wall of needle bearing 223 may also abut the inner wall of the annular member, in which case the end of plunger rod 208 does not protrude beyond the inner wall of the annular member.
At the same time, the long side L of the ring is larger than the short side S, so that the eccentric shaft 101 can only drive the ring to move along the axis of the plunger cavity 205, and the movement in other directions can not occur.
[ Modification 1]
The connecting piece 207 may be a connecting rod, the end of which is connected to the outer ring of the needle bearing 223, and the other end of which is connected to the plunger rod 208, so that the rotation of the eccentric shaft 101 can also realize the alternate movement of the plunger rod 208.
As shown in fig. 2 and 6, the actuator 300 mainly includes a die holder 301, a piston 302, and a hydraulic spring 304;
The end of the die seat 301 is connected with the end face of the pump body 201 to form a hydraulic cavity 303, a piston 302 and a hydraulic spring 304 are arranged in the hydraulic cavity 303, the front end of the piston 302 penetrates out of the die seat 301 for installing a movable die, the end of the hydraulic spring 304 is respectively abutted against the piston 302 and the die seat 301 for enabling the piston 302 to have a trend of approaching the pump body 201, meanwhile, the piston 302 divides the hydraulic cavity 303 into a hydraulic extending cavity 305 and a hydraulic retracting cavity 306, and the hydraulic spring 304 is arranged in the hydraulic retracting cavity 306.
The oil feed passage 203 mentioned above is mainly for conducting the hydraulic pressure extending chamber 305.
Channels for oil return can be arranged in the die seat 301 and the pump body 201 to realize oil return and ensure the reset of the piston 302.
The mode that adopts can be current manual oil return's design, just does not develop the description about manual oil return's structure, belongs to prior art.
However, manual oil return is troublesome, and in order to make the use simpler, the scheme also designs an oil control device 400 capable of automatically returning oil, and the specific scheme of the oil control device 400 is as follows, and reference can be made to fig. 6-8.
The oil control device 400 comprises an oil control valve core 401, an oil control limiting plate 404, a first buffer spring 406 and a second buffer spring 408;
An oil control column 402 is formed or installed in a protruding mode in the middle of the upper end face of the pump body 201, the inside of the oil control column 402 is hollow and conducts the upper end face and the lower end face, the lower end of the oil control column 402 is communicated with an oil chamber, and the inner diameter part of the inside of the upper end of the oil control column 402 is slightly larger than that of other parts;
The lower end of the piston 302 is recessed inwards to form a cavity for accommodating an oil control column 402, the rear end of the oil control valve core 401 is arranged in the oil control column 402, an oil control plug 405 is formed at the front end of the oil control valve core 401, an oil control channel 403 is formed in the oil control valve core 401, and openings at two ends of the oil control channel 403 are respectively positioned at the lower end of the oil control valve core 401 and the side wall of the oil control valve core 401.
The oil control limiting plate 404 is arranged at the lower end of the piston 302, the middle part of the oil control limiting plate 404 is provided with an oil control hole 407, and the diameter of the oil control hole 407 is smaller than the outer diameter of the oil control plug 405, so that the oil control plug 405 can be blocked.
The oil supply seat 219 is provided with an oil passing hole, so that the oil control passage 403 is communicated with the oil chamber 202.
When the oil pump device starts to work and hydraulic oil starts to push the piston 302 to extend, because the oil pressure continuously increases, when the oil control plug 405 is not subjected to the action of additional external force, the oil pressure continuously acts on the oil control plug 405, so that the end part of the oil control column 402 can be sealed by the oil control plug 405, the normal extension of the piston is realized, and the action of the hydraulic cylinder is realized.
During the extending process of the piston 302, the oil control valve core 401 is not moved, at this time, the hydraulic retraction cavity 306 conducts the oil chamber 202 through the return oil duct 216, the hydraulic retraction cavity 306 gradually decreases, and hydraulic oil in the hydraulic retraction cavity 306 can flow back into the oil chamber through the return oil duct 216, so that smooth extending of the piston 302 is realized.
As shown in fig. 7 and 8, when the piston 302 of the actuator 300 moves to a set position, the oil control limiting plate 404 pushes the oil control valve cartridge 401, thereby making the oil control passage 403 conductive.
The setting position refers to that when the actuator 300 is at the critical position of the extended state, that is, when the piston 302 is about to move to the maximum extended state, the oil control limiting plate 404 contacts with the oil control plug 405, so that the oil control valve core 401 is displaced, the end of the oil control valve core 401 is separated from the front end of the oil control column, at this time, high-pressure hydraulic oil of the hydraulic extension cavity 305 flows back to the oil chamber 202 along the oil control channel 403 to realize pressure relief, and the hydraulic spring 304 presses the piston 302 back to the initial position.
As shown in fig. 6, when the piston 302 of the actuator 300 is retracted to the second setting position, the oil control valve cartridge 401 is forcibly pushed to close the oil control passage 403.
The set position indicates that when the piston 302 is retracted to an initial state, that is, when the actuator 300 is in a retracted state, hydraulic oil is not provided to the hydraulic extension cavity 305 at this time, under the action of the hydraulic spring 304, the piston 302 abuts against the oil control plug 405, and the oil control plug 405 is forced to move, so that the end face of the oil control plug 405 abuts against the end face of the oil control column 402, thereby sealing the oil control channel 403, realizing the closing of the oil control channel 403, and at this time, the hydraulic oil in the hydraulic extension cavity 305 cannot flow back to the oil chamber 202 through the oil control channel 403.
When the device is used again, the above process is repeated to perform work.
The first buffer spring 406 is sleeved outside the oil control plug 405, the front end of the oil control column passes through the oil control hole 407 and is arranged in the piston 302, and the end part of the first buffer spring 406 is movably abutted against the oil control limiting plate 404.
The buffer spring one 406 mainly plays a role of buffering, namely, after the piston 302 extends to a certain extent, the oil control limiting plate 404 starts to abut against the buffer spring one 406, and then moves along with the continued movement of the piston 302. After the buffer spring I406 is compressed to a certain extent, the pressure of the oil pressure to the oil control plug 405 is overcome to push the oil control plug 405 to move, so that the oil control channel 403 is communicated.
The buffer spring I406 realizes flexible pressing of the oil control limiting plate 404 and the oil control plug 405, avoids collision deformation and other conditions, reduces noise and prolongs the service life.
A second buffer spring 408 is installed in the upper end of the oil control column 402, and the end of the second buffer spring 408 abuts against the oil control column 402 and the oil control plug 405, respectively.
The buffer spring II 408 can support the oil control plug 405 due to continuous decline of oil pressure in the pressure release process, prevent closing the oil control channel 403 when pressure release is not completed, and ensure smooth completion of pressure release, and can buffer the upper end of the oil control plug 405 to abut against the upper end of the oil control column 402, so as to avoid rapid collision, and prevent unstable oil pressure in the hydraulic cavity 303 and influence hydraulic effect due to poor sealing between the oil control plug 405 and the end of the oil control column 402.
The process of automatic pressure relief oil return can be understood in the process, and in the use scene that combines other equipment, for example, the use of punching tool, when punching a hole, because metal itself can have certain elasticity, can retract, after punching a hole, can have to clip cut-out press utensil, leads to the machine to reset, influences the normal use of equipment, influences the problem of efficiency.
In order to solve the above problems, a structure capable of actively resetting is designed, specifically as follows.
As shown in fig. 9-15, the oil inlet channel 203 includes an oil inlet channel one 214 and an oil inlet channel three 215 which are communicated with the hydraulic extending cavity 305, meanwhile, a reset oil channel 216 is formed in the pump body 201, the reset oil channel 216 is communicated with the hydraulic retracting cavity 306, an oil passing portion 409 is formed on the outer wall of the lower end of the oil control valve core 401, and when the oil control valve core 401 moves axially, the oil inlet channel one 214 can be switched to be communicated with the oil inlet channel three 215 or the reset oil channel 216.
That is, when the piston is at the second setting position, hydraulic oil is not provided to the hydraulic extension chamber 305, that is, when the piston 302 is in the retracted state, the oil passing portion 409 is communicated with the oil inlet flow passage one 214 and the oil inlet flow passage three 215, at this time, hydraulic oil in the oil chamber 202 can be supplied to the hydraulic extension chamber 305 under the action of the oil pump, and hydraulic oil in the hydraulic retraction chamber 306 can flow back to the oil chamber through the return oil passage 216, so as to realize extension of the piston 302.
When the piston is at the set position, the piston is at the critical position of the extending state, namely, the piston 302 is about to move to the maximum extending state, the oil control limiting plate 404 is in contact with the oil control plug 405 to enable the oil control valve core 401 to displace, at the moment, the oil passing part 409 is communicated with the oil inlet channel I214 and the reset oil channel 216 to cut off the communication between the reset oil channel 216 and the oil chamber, namely, hydraulic oil in the hydraulic extending cavity 305 flows back to the oil chamber 202 through the oil control channel 403, meanwhile, the oil supply path of the oil pump is changed into the oil supply for the hydraulic retracting cavity 306 due to the switching of the oil channels, so that the piston 302 returns to the initial position under the action of the oil pressure of the hydraulic spring 304 and the reverse oil supply, the active reset action is realized, and thus, even if the punching die is clamped, the piston 302 can be reset under the action of the reverse oil supply, the blocking is avoided, and the normal use of the equipment is ensured.
The first oil outlet passage is in communication with the first oil inlet passage 214.
At least two oil passing portions 409 are formed on the outer wall of the lower end of the oil control valve core 401, the oil passing portions 409 are distributed along the axial direction of the oil control valve core 401, a second limiting portion 410 is further arranged at the lower end of the oil control valve core 401, and the second limiting portion 410 can be a clamp spring or a pin.
In operation, when oil is supplied into the hydraulic extension chamber 305, one of the oil passing portions 409 is communicated with the first oil inlet flow passage 214 and the third oil inlet flow passage 215, and the other oil passing portion is not in operation;
when the oil control valve core 401 is displaced until the second limiting part 410 abuts against the lower end face of the pump body 201, one oil passing part 409 conducts the first oil inlet flow passage 214 and the return oil passage 216, and the other oil passing part 409 blocks the third oil inlet flow passage 215.
The second limiting part 410 mainly plays a role in ensuring the accuracy of the moving position of the oil control valve core 401, so that the first oil inlet flow passage 214 and the reset oil passage 216 can be accurately conducted by the oil passing part 409, the third oil inlet flow passage 215 is blocked by the other oil passing part 409, smooth operation of the reset action is ensured, and the use stability is ensured.
The mold seat 301 is further formed with a second oil chamber, which is in communication with the oil chamber, mainly to compensate for lack of hydraulic oil due to leakage or loss of the oil chamber.
The oil chamber can be formed in the pump body, and can be additionally connected with an external oil chamber.
In order to ensure the balanced flow of the hydraulic oil in the hydraulic extending cavity 305 and the hydraulic retracting cavity 306 in the oil supply or pressure relief process, a pressure stabilizing oil passage 217 is formed in the oil supply seat 219, the pressure stabilizing oil passage 217 conducts the oil chamber 202 and the return oil passage 216, and a one-way valve 218 is arranged at the joint of the pressure stabilizing oil passage 217 and the return oil passage 216 and is used for controlling the hydraulic oil in the hydraulic retracting cavity 306 to flow back to the oil chamber 202.
On the basis of automatic oil return, a manual oil return device can be installed, the manual oil return device adopts the existing design, description is not expanded, the manual oil return device can be used for pressure relief at any time, and the use scene is more free.
In the actual use process, the relative fixed angle between the grip 501 of the existing device and the grip 502 of the driving device 100 is unchanged, and cannot be adjusted according to the use scene or the use habit, which is inconvenient to use. The present embodiment also describes a reversing device 500 that is installed between the driving device 100 and the oil pump device 200, and has the following specific structure.
A grip 501 is mounted on the die holder 301 and a handle 502 is mounted on the drive device 100.
As shown in fig. 14-18, the reversing device 500 includes a connecting cover 503, a motor flange 504, and a positioning mechanism 505;
The connecting cover 503 is connected to the end of the oil pump device 200, the motor flange 504 is connected to the end of the speed reducer 104, the connecting cover 503 is rotatably connected to the motor flange 504, the positioning mechanism 505 is installed between the connecting cover 503 and the motor flange 504, and the motor flange 504 is formed with a positioning groove 506 matched with the positioning mechanism 505.
The positioning mechanism 505 comprises a positioning member 507 and a positioning spring 508, a positioning hole 509 is formed in the connecting cover 503, the positioning spring 508 and the positioning member 507 are both installed in the positioning hole 509, the positioning member 507 is located at the end part of the positioning spring 508, the positioning spring 508 enables the positioning member 507 to have a trend of protruding the positioning hole 509, and part of the positioning member 507 protruding the positioning hole 509 is matched with the positioning groove 506, so that positioning is achieved.
In this design, can 360 degrees rotations between connecting cover 503 and the motor ring flange 504, constant head tank 506 circumference is provided with four, and the interval contained angle is 90 degrees between the adjacent constant head tank 506, also can set up the constant head tank 506 of other numbers, and the angle can be selected by oneself according to actual conditions.
Therefore, the included angle between the grip 501 and the handle 502 can be automatically adjusted according to the use habit or the use situation of the user, and the use is convenient.
The number of the positioning mechanisms 505 may not be the same as that of the positioning grooves 506, so that in order to restrict the force required by the rotation angle, namely, the included angle between the light twists cannot occur, the use safety is ensured, and a restriction mechanism 510 is further arranged between the connecting cover 503 and the motor flange 504, and the restriction mechanism 510 is used for increasing the force required by rotation, so that the use safety is ensured.
The restraining mechanism 510 includes a strip-shaped mounting groove 511 and an arc-shaped elastic piece 512 formed on the end surface of the connection cover 503, the arc-shaped elastic piece 512 being placed in the strip-shaped mounting groove 511 and partially protruding from the end surface of the connection cover 503.
When the connecting cover 503 is connected to the motor flange 504, the protruding portion of the arc spring 512 is placed in the positioning groove 506, and the deformation elastic force of the arc spring 512 is greater than the force of the positioning spring 508.
An arc-shaped boss 513 is formed on the end face of the motor flange 504, and the outer wall of the arc-shaped boss 513 is movably abutted against the inner wall of the connecting cover 503, so that the motor flange mainly has a positioning function, on one hand, the installation and positioning are guaranteed, and on the other hand, the smoothness of rotation is guaranteed.
The rotational connection between the connection cover 503 and the motor flange 504 is as follows.
The end face of the motor flange 504 is connected with a connecting flange 514 by bolts, the outer side wall of the connecting flange 514 is provided with a limiting edge 515, a movable gap 516 is formed between the limiting edge 515 and the motor flange 504, and the inner side wall of the connecting cover 503 is provided with a convex ring 517.
After the male ring 517 is placed in the clearance 516, and the motor flange 504 is then coupled to the coupling flange 514, the male ring 517 is constrained within the clearance 516 such that the male ring 517 can only rotate within the clearance 516 and cannot be axially displaced to effect coupling.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An electro-hydraulic tool, comprising:
a drive device (100) for providing power;
an oil pump device (200), the oil pump device (200) comprising a pump body (201) and an oil supply mechanism, and
An actuator (300) connected to the oil pump device (200), and
An oil control device (400) which is mounted on the oil pump device (200) and has a front end disposed in the execution device (300);
Wherein, the oil supply mechanism includes:
the oil supply seat (219) is internally provided with an oil inlet, an oil outlet channel I and a plunger cavity (205);
At least two sets of plunger mechanisms (206) mounted within the plunger cavity (205), and
A connecting piece (207) for connecting the eccentric shafts (101);
the eccentric shaft (101) is provided with an eccentric part, and the rotation of the eccentric shaft (101) is converted into the reciprocating movement of the connecting piece (207) in the set direction;
the two sides of the connecting piece (207) in the setting direction are respectively connected with a plunger mechanism (206);
A first gasket (210) is sleeved on the eccentric shaft (101) of the driving device (100), and the first gasket (210) is abutted against the end face of the connecting piece (207);
the oil control device (400) has at least:
The rear end of the oil control valve core (401) is arranged in an oil control column (402) in the middle of the pump body (201), and an oil control channel (403) capable of conducting the hydraulic cavity (303) and the oil chamber (202) is formed in the oil control valve core (401);
An oil control limiting plate (404) mounted on the end of the piston (302) of the actuator (300);
an oil control plug (405) is formed at the end part of the oil control valve core (401) and is used for abutting against the front end of the sealed oil control column;
when the piston (302) of the executing device (300) moves to a set position, the oil control limiting plate (404) pushes the oil control valve core (401), so that the oil control channel (403) is conducted;
When the piston (302) of the executing device (300) is retracted to a second set position, the oil control valve core (401) is forced to be pushed to close the oil control channel (403);
The actuating device (300) is internally provided with a hydraulic cavity (303), a piston (302) is arranged in the hydraulic cavity (303), and the hydraulic cavity (303) is divided into a hydraulic extending cavity (305) and a hydraulic retracting cavity (306);
An oil inlet channel (203) is formed in the pump body (201), and the oil inlet channel (203) comprises an oil inlet channel I (214) and an oil inlet channel III (215) communicated with the hydraulic extension cavity (305);
a reset oil duct (216) is formed in the pump body (201), and the reset oil duct (216) is communicated with a hydraulic retraction cavity (306);
An oil passing part (409) is formed on the outer wall of the lower end of the oil control valve core (401);
when the oil control valve core (401) axially moves, the first oil inlet flow passage (214) is switched to be communicated with the third oil inlet flow passage (215) or the reset oil passage (216).
2. The electro-hydraulic tool of claim 1, wherein,
The plunger mechanism (206) has at least:
a plunger rod (208) having a rear end connected to the connecting element (207) and a front end inserted into the corresponding plunger cavity (205);
the rotation of the eccentric shaft (101) drives the end parts of at least two plunger rods (208) to alternately reciprocate in the plunger cavity (205).
3. The electro-hydraulic tool of claim 2, wherein:
The connecting piece (207) is an annular piece, the rear end part of the plunger rod (208) is connected to the annular piece, and the end part of the eccentric shaft (101) is arranged in the annular piece and movably abuts against the rear end part of the plunger rod (208) or the inner wall of the annular piece.
4. The electro-hydraulic tool of claim 3, wherein:
The end face of the oil supply seat (219) is provided with a first limiting part (209), and the side wall of the annular piece moves along the side wall of the first limiting part (209) and is used for limiting the position of the annular piece so as to enable the annular piece to move along the axial direction of the plunger rod (208).
5. The electro-hydraulic tool of claim 4, wherein:
The end part of the first limiting part (209) is provided with a first clamping groove (211), and the first clamping groove (211) is clamped by the clamping piece (212) to restrict the position of the first gasket (210), so that the position of the connecting piece (207) is restricted.
6. The electro-hydraulic tool as set forth in any one of claims 1-4, wherein:
The oil control plug (405) is sleeved with a first buffer spring (406), an oil control hole (407) is formed in the middle of the oil control limiting plate (404), the front end of the oil control column (402) penetrates through the oil control hole (407) and is arranged in the piston (302), and the end part of the first buffer spring (406) is movably abutted against the oil control limiting plate (404);
and a buffer spring II (408) is sleeved on the oil control valve core (401), and the end part of the buffer spring II (408) is respectively abutted against the oil control column (402) and the oil control plug (405) and is used for supporting the buffer oil control valve core (401).
7. The electro-hydraulic tool as set forth in any one of claims 1-4, wherein:
The oil inlet flow passage I (214) is provided with an oil inlet flow passage III (215) and a reset oil passage (216) which are distributed in the pump body (201) along the moving direction of the oil control valve core (401).
8. The electro-hydraulic tool as set forth in any one of claims 1-4, wherein:
At least two oil passing parts (409) are formed on the outer wall of the lower end of the oil control valve core (401), and a limiting part II (410) is further arranged at the lower end part of the oil control valve core (401);
when the second limit part (410) abuts against the lower end face of the pump body (201), the oil passing part (409) conducts the first oil inlet flow passage (214) and the reset oil passage (216).
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| CN202210398538.7A CN114738266B (en) | 2022-04-16 | 2022-04-16 | An electric hydraulic tool |
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| CN202210398538.7A CN114738266B (en) | 2022-04-16 | 2022-04-16 | An electric hydraulic tool |
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| CN115507014B (en) * | 2022-08-24 | 2024-11-12 | 台州昊海动力科技有限公司 | An oil pump |
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| CN201810542U (en) * | 2010-10-19 | 2011-04-27 | 郑州磨料磨具磨削研究所 | Ultrahigh-pressure variable radial plunger pump |
| CN106944959A (en) * | 2017-03-10 | 2017-07-14 | 黄建鑫 | A kind of automatic oil return formula hydraulic pressure pressure pipe pincers |
| CN218882497U (en) * | 2022-04-16 | 2023-04-18 | 台州巨力工具股份有限公司 | Electric hydraulic tool |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100358745B1 (en) * | 1998-12-23 | 2003-01-15 | 주식회사 만도 | Reciprocating hydraulic valve of brake traction control system |
| US6490962B1 (en) * | 2001-05-17 | 2002-12-10 | The Stanley Works | Hydraulic tool with an OC/CC selector |
| CN1862072A (en) * | 2006-06-15 | 2006-11-15 | 王东升 | Valve type oil feeder |
| CN201802328U (en) * | 2010-09-09 | 2011-04-20 | 莱州市霸力石油机械有限公司 | Hydraulic safety control system for hydraulic power tongs |
| WO2013141737A1 (en) * | 2012-03-23 | 2013-09-26 | Zuev Boris Konstantinovich | Internal combustion engine |
| JP5730369B2 (en) * | 2013-10-17 | 2015-06-10 | 定之 中西 | Switching valve |
| CN206144654U (en) * | 2016-10-28 | 2017-05-03 | 广州汽车集团股份有限公司 | Piston cooling nozzle controlling means and have device's engine |
| CN210564433U (en) * | 2019-10-08 | 2020-05-19 | 中石化石油工程技术服务有限公司 | Hydraulic setting tool |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810542U (en) * | 2010-10-19 | 2011-04-27 | 郑州磨料磨具磨削研究所 | Ultrahigh-pressure variable radial plunger pump |
| CN106944959A (en) * | 2017-03-10 | 2017-07-14 | 黄建鑫 | A kind of automatic oil return formula hydraulic pressure pressure pipe pincers |
| CN218882497U (en) * | 2022-04-16 | 2023-04-18 | 台州巨力工具股份有限公司 | Electric hydraulic tool |
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