CN105171698B - Hydraulic tool - Google Patents
Hydraulic tool Download PDFInfo
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- CN105171698B CN105171698B CN201510450368.2A CN201510450368A CN105171698B CN 105171698 B CN105171698 B CN 105171698B CN 201510450368 A CN201510450368 A CN 201510450368A CN 105171698 B CN105171698 B CN 105171698B
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Abstract
The present invention relates to a kind of hydraulic tool, including working cell, driving unit and pressure release unit.Working cell is suitable for operating workpiece.Driving unit is configured to be driven working cell, and including cylinder body, the moving part that is arranged in cylinder body and can be moved between initial position and operating position and for towards the elastic component of initial position bias movable part, wherein, cylinder body and moving part define pressurized fluid to be filled with towards the chamber of operating position bias movable part.Pressure release unit includes hydraulic pressure releasing valve.Hydraulic pressure releasing valve is configured to open so that chamber pressure release when the indoor Fluid pressure of chamber reaches predetermined threshold.Hydraulic tool is configured to that moving part is allowed to visually indicate to provide a user towards initial position movement preset distance after hydraulic pressure releasing valve is opened, and preset distance is less than the distance from operating position to initial position.
Description
Technical field
The present invention relates to the hydraulic tools of a kind of hydraulic tool, particularly a kind of workpiece for such as pipe.
Background technology
The content of this part provide only with the relevant background information of the disclosure, the prior art may not formed.
Being commonly used for the hydraulic tool (being also referred to as crimping tool in some cases) of the workpiece of crimping such as pipe includes opening
Pass, motor, pump, hydraulic cylinder and working cell (also referred to as crimping unit in some cases).Crimping unit includes movable part
Point and static part.Moving part is mounted on the projecting end of piston rod.In this way, after crimping tool startup, in hydraulic cylinder
Fluid pressure promote piston rod and crimp unit moving part move together, crimp the moving part of unit in translation
Static part is progressively closer in the process, the space between moving part and static part is thus reduced, so as to work therebetween
Part is crimped.
In addition, above-mentioned crimping tool, after crimping process is completed, relief valve is opened so that the pressure in hydraulic cylinder is complete
Pressure release so that crimp the directly movement of the moving part of unit and the piston rod of hydraulic cylinder and piston and be back to initial position.Cause
This, when crimping tool is completed to crimp to workpiece, user be difficult to know crimping process completed and always by compressing switch so that horse
Up to operation always until the movement of above-mentioned movable member is back to initial position.During crimp next time, the pressure in hydraulic cylinder
Power needs are begun to ramp up again from initial pressure, cause that crimping process is longer, work efficiency reduces.
For some conventional crimping tools, after relief valve is by the pressure pressure release in hydraulic cylinder, in hydraulic cylinder
Resetting spring need to provide sufficiently large elastic force so as to will crimp unit moving part and hydraulic cylinder piston rod and
Piston movement is back to initial position.Therefore, the requirement to resetting spring is higher.
Therefore, it is expected a kind of Optimization Work process and the compact hydraulic tool of work efficiency can be improved in this field.
The content of the invention
It is an object of the present invention to provide a kind of hydraulic tool of Optimization Work process, which can be user
What offer work terminated visually indicates.
A further object of the present invention is to provide a kind of hydraulic tool for improving work efficiency.
A further object of the present invention is to provide a kind of compact hydraulic tool of small volume.
One or more of above-mentioned purpose can be realized by following proposal：A kind of hydraulic tool include working cell,
Driving unit and pressure release unit.Working cell is suitable for operating workpiece.Driving unit is configured to drive working cell
It is dynamic, and including cylinder body, be arranged on interior cylinder body and the moving part that can be moved between initial position and operating position and
For towards the elastic component of initial position bias movable part, wherein, cylinder body and moving part define pressurized fluid to be filled
With towards the chamber of operating position bias movable part.Pressure release unit includes hydraulic pressure releasing valve.Hydraulic pressure releasing valve is configured in chamber
Indoor Fluid pressure is opened when reaching predetermined threshold so that chamber pressure release.Hydraulic tool is configured to open it in hydraulic pressure releasing valve
Moving part is allowed to move preset distance towards initial position afterwards to visually indicate to provide a user, preset distance is less than from work
Position to initial position distance.
Using the above program, due to hydraulic pressure releasing valve opening after moving part only partially retract (that is, do not retract to
Initial position), therefore user is visually perceptible for the partial rollback process, it is possible thereby to know the one action of hydraulic tool
Process has been completed.At this moment, user can stop motor, to save the energy of such as battery.This point, it is special when working in the wild
It is not favourable.Further, since moving part only partially retracts, therefore, the indoor pressure of chamber of driving unit is higher than initial pressure.
In this way, for example, it is desired to when being operated to next workpiece, when can shorten the rising of the indoor pressure of chamber of driving unit
Between, so as to improve the work efficiency of hydraulic tool.
Preferably, when the moving part is moved towards the initial position, the working cell and the elastic component
The elastic restoring force that the moving part is biased towards the initial position is provided together, and institute is reached in the moving part
When stating preset distance, the elastic restoring force of the working cell is close to zero.Flexible deformation can occur in working cell and carry
In the case of for the elastic force towards initial position bias movable part, the load of the elastic component of driving unit can be reduced, i.e.
Reduce the requirement to the elastic component of driving unit.
Preferably, the pressure release unit further includes manual relief valve, and the manual relief valve is constructed to be permeable to manual unlocking
With by the chamber pressure release so that the moving part can be back to the initial position.In this way, in all of hydraulic tool
After the course of work is completed, i.e. when no longer needing to handle workpiece, can open manual relief valve recovers hydraulic tool
To original state.
Preferably, the hydraulic pressure releasing valve is configured to allow for the chamber via the fluid passageway being arranged in the cylinder body
It is connected with fluid source.
Preferably, the fluid source is located in the space limited by the cylinder body, and the hydraulic pressure releasing valve is arranged on
In the fluid source.
Preferably, the manual relief valve is the form of check valve.For example, manual relief valve includes：The valve of fixed setting
Gear, with the spool of valve guard cooperation, for the valve rod that makes spool movement and for make that the valve rod resets first
Elastic component, the spool construction prevent fluid by the manual relief valve and moving away into when abutting the valve guard
The manual relief valve is allowed fluid from when stating valve guard.Preferably, spool is in hemispherical, and the hemisphere face of the spool with
The valve guard cooperation.
Preferably, manual relief valve further includes to bias the spool to abut the first elastic component of the valve guard, example
Such as, spring.
Preferably, the pressure release unit further includes to manually turn on the control stick of the manual relief valve, the behaviour
Vertical pole is pivotally connected to the housing of the hydraulic tool by pin.
Preferably, hydraulic tool further includes the pumping unit being integrally disposed in the cylinder body, the pumping unit construction
It is pumped to by the fluid in the fluid source in the chamber.Pumping unit is integrated in cylinder body, hydraulic pressure work can be reduced
The volume of tool.
Preferably, hydraulic pressure releasing valve is also configured to reach preset distance in the moving part and the pumping unit stops
It is closed after to the chamber pumped fluid.In this way, user obtain one action terminate visually indicate after, can stop horse
Up to no longer to driving unit supply pressurized fluid.At this point, hydraulic pressure releasing valve can close the indoor pressure of chamber being maintained at pre-
Fixed level, advantageously reduces the pressing time of the next course of work, so as to shorten the course of work, provides work efficiency.
Optionally, pumping unit includes plunger pump.
Preferably, being provided in fluid passageway of the pumping unit with the fluid source is connected allows fluid from fluid
Source stream enters the check valve of the pumping unit.Similarly, in fluid passageway of the pumping unit with the chamber is connected
The check valve that fluid is allowed to flow into the chamber from the pumping unit can be provided with.In this way, the safety of system can be provided
Property and stability.
In addition, the preset distance is determined by least one of following items：The elasticity of the driving unit
Part, by the structure of the hydraulic pressure releasing valve and the fluid passageway of the chamber, the valve for biasing the hydraulic pressure releasing valve
Plug is with the elastic component of closes said fluid channel.It is, of course, also possible to by other modes well known by persons skilled in the art come really
The fixed preset distance.
Preferably, roller is fixedly provided on the moving part so as to directly drive the working cell, and
The roller is exposed to outside or described visually indicate is provided via visual window.Through this construction, user can be conducive to
Visual observation is carried out to the course of work (particularly, the course of work of working cell) of hydraulic tool.
Preferably, preset distance is more than 3mm.In this way, can allow the user to observe visually moving part or roller or
Whether working cell retracts.If user observes visually moving part or roller or working cell retracts, motor can be made
Stop and/or pumping unit is made to stop supplying pressurized fluid to the chamber of driving unit, to save the energy.
Hydraulic tool according to the present invention can be crimping tool or cutting implement, can be used for tubulose particularly
The crimping tool or cutting implement of workpiece.
Description of the drawings
By description referring to the drawings, the feature and advantage of one or several embodiments of the invention will become more
Add and be readily appreciated that, wherein：
Fig. 1 is the partial sectional view of the hydraulic tool of embodiment according to the present invention, and wherein hydraulic tool is in and initially beats
Open and (do not crimp) state；
Fig. 2 is the partial sectional view of the hydraulic tool of embodiment according to the present invention, and wherein hydraulic tool is in pressure completely
Connect state；
Fig. 3 is the partial sectional view of the hydraulic tool of embodiment according to the present invention, and wherein hydraulic tool has been completed to crimp
The hydraulic-driven part of process and hydraulic tool returns to preset distance；
Fig. 4 is the schematic cross-sectional view of the hydraulic tool of embodiment according to the present invention, and it illustrates manual relief valves；
Fig. 5 is the schematic cross-sectional view of the manual relief valve of embodiment according to the present invention, is closed wherein manual relief valve is in
Closed position；And
Fig. 6 is pressure and the figure of time in the hydraulic pressure releasing valve of the hydraulic tool of embodiment according to the present invention.
Specific embodiment
Description related to the preferred embodiment is only exemplary below, and is definitely not to the present invention and its application or usage
Limitation.In various figures the same reference numerals are used to designate identical component, therefore the construction of same parts will not
Repeat description.
The hydraulic tool of embodiment according to the present invention is described referring to Fig. 1 to Fig. 3.It should be understood that it is
Illustrative purpose, herein illustrates the principle of the present invention by taking the crimping tool operated to pipe as an example.However, the present invention is simultaneously
Crimping tool is not limited to, for example, present invention can also apply to clamp tool, cutting implement, compression tools etc..
Referring to Fig. 1, it illustrates embodiment according to the present invention for the crimping tool that is crimped to pipe.Such as Fig. 1
Shown, the crimping tool 1 of embodiment can be the form of hand held electric tool according to the present invention.Crimping tool 1 can wrap
It includes crimping unit (or being working cell) 10 and is connected to the housing 80 of crimping unit 10.Crimping unit 10 can be configured to pair
The workpiece of such as pipe is crimped.It can be provided with to drive the driving unit 20 of crimping unit 10 in housing 80, be used for
The pressure release unit 30 of pressure release is carried out when pressure in driving unit 20 is more than predetermined pressure, for hydraulic oil to be pumped to driving
The pumping unit 40 of unit 20, for power is transferred to pumping unit 40 with drive the gear unit 50 of pumping unit 40, use
In the switch that the various pieces for crimping tool 1 provide the power unit 60 of power and are turned on and off power unit 60
Control unit 70.
Although the unit in addition to unit 10 is crimped of crimping tool 1 is integrated in housing 80 in the example of diagram
In, it is to be understood, however, that one or more units can be independently of housing 80, for example, pumping unit 40, gear unit
50th, power unit 60 and/or switch control unit 70 can be arranged on housing 80 outside and with other lists in housing 80
Member is connected.Additionally, it should be understood that crimping unit 10 can be integrally formed with housing 80.
In the example shown in the series of figures, crimping unit 10 includes two crimping components 11 and 13.The two crimping components 11 and 13
It can be the form of plate, side by side and be disposed adjacently in one plane.Preferably, crimping component 11 and 13 can have substantially
Identical structure, and substantially symmetric on axis therebetween, wherein, the axis be approximately perpendicular to workpiece to be crimped (for example,
Pipe) longitudinal axis and be properly termed as the axis of symmetry.Here, describing for convenience, the adjacent of component 11 and 13 will be crimped
Side (face) is known as inside (face), and its side (face) away from each other is known as outside (face).Crimping component 11 and 13 each includes
Pressure contact portion and the driving portion for driving pressure contact portion.In the example shown in the series of figures, pressure contact portion be free end or crimping 117,
137, and driving portion is the driving end 115,135 opposite with crimping 117,137.
In the example shown in the series of figures, the neighbouring workpiece to be crimped of crimping 117,137 of component 11,13 is crimped, and it drives
Moved end portion 115,135 is adjacent to driving unit 20.Crimp component 11,13 driving end 115,135 each include end face 114,
134.Drive surface 112,132 is respectively arranged on the medial surface of crimping component 11,13, at proximate end face 114,134.It is preferred that
Ground is provided with filleted between drive surface 112,132 and end face 114,134.In drive surface 112,132 can be directed towards
The cam surface that side protrudes.Crimping is respectively arranged on the medial surface of crimping component 11,13, at neighbouring crimping 117,137
Face 111,131.Electrolysis 111,131 is recessed towards lateral surface from the medial surface of crimping component 11,13 respectively so as to workpiece
Workpiece is contained in the space limited by electrolysis 111,131 when being handled.Electrolysis 111,131 can have with it is pending
Workpiece the shape that matches of exterior contour.In the case of the crimping tool of aluminium hydraulic pressed connecting pipe etc, electrolysis 111,131 can be with
Each be arc-shaped shape, and it is aligned with each other so as to will piece-holder be crimped therebetween.Electrolysis 111 and drive surface 112 it
Between can be provided with to receive the hole of pin 12 so that crimping component 11 can be pivoted around pin 12.Similarly, in electrolysis
The hole of pin 14 can be provided with to receive between 131 and drive surface 132 so that crimping component 13 can be pivoted around pin 14.
When driving unit 20 drives drive surface 112,132 of crimping component 11,13, driving end 115,135 deforms upon and divides
Not Wei Rao pin 12,14 towards outside pivot, and crimping 117,137 respectively around pin 12,14 towards inside pivot so as to right
The workpiece of such as pipe is crimped.
Preferably, drive end 115,135 can be by certain flexible deformation occurs under the driving effect of driving unit 20
Material formed.In this way, after the completion of crimping, the deformation energy accumulated in driving end 115,135 can be conducive to partly
It resists the hydraulic-driven power in driving unit 20 and is back to its initial position to promote to crimp component 11,13.In this way, with only passing through
The situation that the spring of driving unit provides the power that crimping component is made to be back to initial position is compared, which can be significantly
Reduce the load of the spring of driving unit, so as to optimize the distribution of the power between all parts of entire hydraulic tool.
Crimping tool 1 according to the present invention can also include connection crimping component 11,13 and connect crimping component 11,13
To the side plate 15 of housing 80.Preferably, can one side plate 15 be respectively set in the both sides of crimping component 11,13.It is set on side plate 15
It is equipped with to receive the hole of pin 12 and 14, thus side plate 15 can be connected to one via pin 12 and 14 by component 11 and 13 is crimped
It rises.In addition, it in the example shown in the series of figures, can also be provided with to receive the hole of pin 16 on side plate 15, wherein by means of pin 16
Side plate 15 is connected to such as hydraulic cylinder.In the example shown in the series of figures, it is located in receive pin 12,14 for receiving the hole of pin 16
Hole the axis of symmetry on.It should be understood that side plate 15 can have the function of to realize above-mentioned any suitable structure, without office
It is limited to the structure of diagram.
Driving unit 20 is configured to that crimping component 11,13 can be driven to surround respectively under the action of the pressure of pressurized fluid
Pin 12,14 pivots.As shown in the figure, driving unit 20 can include hydraulic cylinder crimps component with the driving that is used for for being connected to hydraulic cylinder
11st, 13 actuator.Hydraulic cylinder can include cylinder body 21, the piston 23 being arranged in cylinder body 21, be connected in the one side of piston 23
Piston rod 25 to piston 23, the return springs being arranged on piston rod 25, for example, spring shown in figure 27.In piston
23 one side opposite with resetting spring 27 forms Packed pressurised chamber 26.It is single by pumping when crimping tool 1 operates
Pressurized hydraulic oil is pumped in pressurised chamber 26 by member 40 so that the pressure of the pressurized fluid in pressurised chamber 26 can overcome multiple
Position spring 27 power and promote piston 23 and piston rod 25.Piston rod 25 can be stretched out from cylinder body 21, and component is crimped for driving
The actuator of (drive surface for being specifically as follows crimping component) can be arranged on the projecting end of piston rod 25.Preferably, such as
Shown in figure, actuator can include two rollers 22 for respectively driving the drive surface 112,132 of crimping component 11,13, by
This can reduce the frictional resistance between drive surface 112,132 and therefore can reduce to mill caused by drive surface 112,132
Damage.As described above, cylinder body 21 forms the fixed part of driving unit 20, and piston rod 25 and piston 23 form driving unit 20
Moving part.
Preferably, roller 22 can be installed to moving part in the following manner：Roller 22 can follow moving part one
Translation is played, while itself can be rotated.Particularly, roller 22 can be arranged on the free end of piston rod 25, so as to directly
Working cell 10 is driven, can so reduce driving frictional force.Preferably, roller 22 can be exposed to outside or via can
Form provides a user once visually indicating of terminating of crimping process.In this case, user only needs to observe roller
Movement can understand the state of crimping process.It is, of course, also possible to scale or the like is set in the fixed component of such as housing
Label symbol, so that user more clearly observes the movement position of roller.It should be understood that other any conjunctions can also be passed through
Suitable method provides a user this visually indicate.
In the example shown in the series of figures, actuator sets independently of hydraulic cylinder and is connected to hydraulic cylinder, it should be understood, however, that
It is that actuator can also be integrally formed with the piston rod of hydraulic cylinder.In addition, in the example shown in the series of figures, cylinder body 21 is independently of shell
Body 80 sets and is connected to housing 80, however, it should be understood that cylinder body 21 can be integrally formed with housing 80.
In the example shown in the series of figures, pumping unit 40 can include plunger pump.Plunger pump may be integrally formed in cylinder body 21
In.Plunger pump is in fluid communication with fluid source 90, and is in fluid communication with the pressurised chamber 26 of driving unit 20.As shown in the figure, stream
Body source is oil groove or oil sac 90.Plunger pump pumps the hydraulic oil in oil sac 90 via fluid passageway when its piston reciprocation is moved
Into pressurised chamber 26.Preferably, check valve can be provided in fluid passageway of the connection plunger pump with oil sac 90, to prevent stream
Body is back to from plunger pump in oil sac 90.Furthermore it is possible to it is provided in fluid passageway of the connection plunger pump with pressurised chamber 26
Another check valve is back to from pressurised chamber 26 in plunger pump to prevent fluid.Check valve can be with known in the art any suitable
The valve of form, herein without being described in detail.
Power unit 60 can be motor.In manual depression switch control unit 70, the rotor rotation of motor 60, so as to
Drive drive shaft rotation.Power is transferred to the plunger of plunger pump via gear unit 50 so that piston reciprocation moves to pump
Hydraulic oil.Gear unit 50 can be gear transmission unit.Preferably, gear unit 50 includes the plunger for driving plunger pump
The cam of reciprocating motion.As shown in the figure, switch control unit 70 can be the form of manual switch (for example, button switch) and
It can be arranged on the shank that hand is facilitated to hold of housing 80 to be operated manually.
Pressure release unit 30 can include hydraulic pressure releasing valve 32.Hydraulic pressure releasing valve 32 is configured to the pressure in pressurised chamber 26
It opens when reaching predetermined threshold and is closed after the moving part of driving unit 20 returns to preset distance.The predetermined threshold example
It can such as be determined according to desired crimping level.In other words, when being crimped to aspiration level to workpiece, driving unit 20
Pressure in chamber 26 rises to maximum, which corresponds to above-mentioned predetermined threshold.In this way, at the end of crimping, chamber
Pressure in 26 rises to predetermined threshold, at this point, hydraulic pressure releasing valve 32 is opened.After the opening of hydraulic pressure releasing valve 32, chamber 26
It is connected with fluid source, therefore the pressure in chamber 26 declines, i.e. pressure release.
As shown in Figure 1, hydraulic pressure releasing valve 32 is connected by the fluid passageway 34 set in cylinder body 21 with 26 fluid of pressurised chamber
It is logical.Hydraulic pressure releasing valve 32 can be arranged in oil sac 90 or be arranged in the space connected with oil sac 90.Hydraulic pressure releasing valve 32
It can include cylinder body, be arranged in cylinder body and stretch out the valve plug 322 coordinated with fluid passageway 34 from one end of cylinder body, set
In the in vivo spring for being used to apply valve plug 322 restoring force of cylinder.When hydraulic pressure releasing valve 32 is closed, valve plug 322 is in spring
Under the action of against fluid passageway 34 outlet.When the pressure in pressurised chamber 26 reaches predetermined threshold, the pressure of pressurized fluid
Valve plug 322 can be pushed away the outlet of fluid passageway 34 by power so that the fluid (hydraulic oil) in pressurised chamber 26 is via passage 34
It flows into oil sac 90.When valve plug 322 is opened, pressurised chamber 26 is in fluid communication with oil sac 90, thus reduces pressurised chamber 26
Interior pressure.Pressure after the opening of valve plug 322 and in the pressurised chamber 26 drops to desired closing pressure (or to set
Definite value) when, valve plug 322 return against and thus close fluid passageway 34 outlet.Closing pressure can be adjusted as needed
Section, such as be adjusted by changing the spring of valve.Preferably, which can be more than the pressure value in oil sac 90.It changes
Sentence is talked about, and when being turned off after valve plug 322 is opened, can the pressure in pressurised chamber 26 be remained setting value and non-initial
It is worth (for example, pressure value substantially in oil sac).In this case, the moving part of driving unit 20 returns to certain distance,
Rather than it is back to its initial position.
After hydraulic pressure releasing valve opening, in order to allow users to be clearly observed this movement that retracts, it can will drive
The preset distance of the moving part of moving cell towards initial position return movement is set greater than 3mm.
Can by design fluid passageway 34 size (particularly fluid passageway 34 outlet size), hydraulic pressure releasing valve
The size or material of the size or material of 32 spring and/or the spring of driving unit realizes pressure release unit according to the present invention
The above-mentioned function and the course of work of 30 hydraulic pressure releasing valve 32 and/or come the preset distance that determines the return movement of moving part.
It should be understood that the preset distance can also be adjusted by setting the parameter of other component.
After completing all crimping processes and making 26 pressure release of pressurised chamber by hydraulic pressure releasing valve 32, micro-leakage,
Consume etc. reduces further slowly the pressure in pressurised chamber 26.In this way, after longer period, pressurised chamber
Pressure in 26 can also be slowly decreased to initial pressure.
Preferably, pressure release unit 30 can also include manual relief valve 31.Manual relief valve 31 can be configured to all
It when crimping process is completed and/or can in case of emergency be manually opened and driving unit is caused with the thorough rapidly pressure release of progress
20 moving part is reset to its initial position.
Referring to Fig. 4 to Fig. 5, it illustrates manual relief valves 31 according to the present invention.Optionally, manual relief valve 31 can be with
It is the form of check valve.As shown in the figure, manual relief valve 31 can include the valve being fixed in housing 80 and/or cylinder body 21
Gear 319, the spool 317 coordinated with valve guard 319, for activating the valve rod 315 of spool 317 and be arranged on valve rod 315 and valve guard
To provide the spring 313 of restoring force for valve rod 315 between 319.In the example shown in the series of figures, the substantially hemispherical of spool 317, and
And the spherical surface of spool 317 can abut valve guard 319 to close manual relief valve 31.Preferably, valve guard 319 can be set on the inside of it
It is equipped with and the protruding portion of the mating spherical surfaces of spool 317 3192.When spherical surface abuts protruding portion 3192, manual relief valve 31, which is in, to close
Closed state.When valve rod 315 promotes spool 317 away from protruding portion 3192, manual relief valve 31 is opened to allow pressurised chamber
Fluid in 26 flows through protruding portion 3192 via fluid passageway 312 and is flowed into via fluid passageway 316 in oil groove or oil sac.It is preferred that
Ground can set sealing element between valve rod 315 and housing 80, be leaked to prevent fluid.The sealing element can be the shape of O-ring
Formula.
Manual relief valve 31 can be in fluid communication via fluid passageway 312 and pressurised chamber 26.In addition, by control stick 311
Being fixedly attached to housing 80 enables control stick 311 that the movement of valve rod 315 is made to push away spool 317 when being manually depressed
Valve guard 319 is to open manual relief valve 31.In the case of non-depressed control stick 311, the pressurized fluid pair in fluid passageway 312
Spool 317, which applies pressure, makes it abut the protruding portion 3192 of valve guard 319 to close manual relief valve 31.In the example shown in the series of figures,
Control stick 311 is pivotally connected to housing 80 by pin.However, it should be understood that control stick 311 can be with any suitable side
Formula is connected to housing 80, as long as it can realize above-mentioned function.
Optionally, manual relief valve 31 can also include the protruding portion 3192 towards valve guard 319 to 317 applied force of spool
Spring 314.Specifically, spring 314 is configured to bias spool 317 so that can make 317 court of spool after control stick 311 is discharged
It moves to close manual relief valve 31 to protruding portion 3192.
The operating process of crimping tool 1 according to the present invention is described in detail referring to Fig. 1 to Fig. 6.
Under the original state of crimping tool 1, as shown in Figure 1, the pressure of two crimping components 11 and 13 of crimping unit 10
End is connect to open to receive workpiece to be crimped away from each other.Moreover, manual relief valve 31 and hydraulic pressure releasing valve 32 are in
Closed state.Will be after workpiece be crimped is put into the space limited by electrolysis 111 and 131, pressure switch 70 be to start
Motor 60.The plunger that power is transferred to plunger pump via the cam of gear unit 50, particularly gear unit 50 causes plunger
It moves back and forth, so as to which the hydraulic fluid in oil sac 90 is pumped to via fluid passageway in the pressurised chamber 26 of driving unit 20.
With the increase of the Fluid pressure in pressurised chamber 26, the moving part of driving unit 20 is forced to move, so as to against and promote
Crimp the drive surface 112,132 of component 11,13 so that the driving end 115 of crimping component 11,13,135 flexible deformation (such as Fig. 2
Shown in arrow) and so that crimping component 11,13 pivots respectively around pin 12,14.At this point, the crimping of crimping component 11,13
Face 111 and 131 is close to each other to be crimped to workpiece.
As shown in Fig. 2, when applying maximum allowable crimp force to workpiece, i.e. when the pressure in pressurised chamber 26 rises to
During predetermined threshold (for example, 50Mpa shown in Fig. 6), the driving end 115,135 of crimping component 11,13 is substantially at maximum
Deformation state.Lead at this point, the pressure of the fluid in pressurised chamber 26 forces the valve plug 322 of hydraulic pressure releasing valve 32 to move away fluid
The outlet in road 34 so that pressurised chamber 26 is in fluid communication with oil sac 90.Therefore, the pressure rapid decrease in pressurised chamber 26.Example
Such as, as shown in fig. 6, the pressure in pressurised chamber 26 drops to 2Mpa.
As shown in figure 3, during the pressure in pressurised chamber 26 declines, the driving end of component 11,13 is crimped
115th, 135 deformation energy release, the restoring force F2 of resulting deformation force F1 and the spring 27 in hydraulic cylinder act on piston
The pressure F3 that applies to piston 23 of pressurized fluid for making a concerted effort to be more than in pressurised chamber 26 on 23 so that drive end 115,135,
The moving part of driving unit 20 back moves.As the moving part displacement distance D1 of driving unit 20, the work of F1 ' and F2 '
With when the fluid for making a concerted effort to be substantially equal in pressurised chamber 26 on piston 23 is applied to the pressure F3 ' on piston 23, i.e. piston
When the power of 23 both sides is in equilibrium state, the moving part of driving unit 20 stops movement.It conveyed by distance D1 for user
What once crimping process had terminated visually indicates.Therefore, distance D1 is set as in the range of user's visual perception.For example, away from
From D1 can be moving part retract to initial position 10 to percent 90.Due to according to the present invention
What the once crimping process that crimping tool can provide to the user had terminated visually indicates, therefore user can discharge in time
It closes, with energy saving.In the example depicted in fig. 3, the moving part of driving unit 20 is back to its initial position not yet.
In above process, due to make use of the deformation force F1 of driving end 115,135, the spring 27 in hydraulic cylinder
Restoring force F2 need not be too big, it is possible thereby to reduce the size of spring 27, and therefore can reduce the size of hydraulic cylinder.
In addition, user is after the moving part for perceiving driving unit 20 has retracted distance D1 --- learning once
After crimping process has terminated --- release switch 70, motor 60 stop, thus plunger pump stops pumped fluid, pressurised chamber 26
Interior pressure further declines.Once release switch 70, the valve plug 322 of hydraulic pressure releasing valve 32, which then quickly returns and abuts fluid, to be led to
The outlet in road 34.When the valve plug 322 of hydraulic pressure releasing valve 32 closes fluid passageway 34, the pressure in pressurised chamber 26 is approximately
2Mpa, still above the pressure in oil sac 90.
At this point, if necessary to continuously crimp same pipe or another pipe, switch 70 can be directly depressed, repeats crimping process.
Process is this time crimped from initial crimping process the difference is that the pressure in pressurised chamber 26 is different.Due to pressurised chamber 26
Interior pressure is still above the pressure in oil sac 90, therefore, for subsequent crimping process, the pressure in pressurised chamber 26
Rise time can shorten.Alternatively, the motor of small volume may be employed in crimping tool according to the present invention, it is possible thereby to drop
The cost of low pressure bonding tool.
After the completion of all crimping processes, i.e. when will not be used crimping tool workpiece being crimped, can pass through
Control stick 311 is manually depressed and opens manual relief valve 31, so that the pressure in pressurised chamber 26 further reduces.For example,
When manual relief valve 31 is opened, the pressure in pressurised chamber 26 is reduced to the pressure roughly equal with the pressure in oil sac.It is logical
It crosses and opens manual relief valve 31, the moving part of driving unit 20 can be made to be back to its initial position.Alternatively, in operating trouble
Or in emergency circumstances, manual relief valve 31 can also be manually turned on by control stick 311, so that 26 pressure release of pressurised chamber, from
And it may insure the security of crimping tool.
Due to reducing the pressure in pressurised chamber 26 by hydraulic pressure releasing valve 32, then manually pressure release
When valve 31 is to 26 further pressure release of pressurised chamber, can greatly reduce the power that is operated manually to relief valve 31 and/or
The length of control stick 311 can be shortened.
As noted previously, as the size of hydraulic cylinder can be integrated in cylinder body with smaller, plunger pump and be may be employed smaller
The motor of volume, therefore, the structure of entire crimping tool of the invention can be compacter, and weight is lighter, thus significantly facilitates
Hand-held.
It will be understood by those skilled in the art that the present invention is not limited to above-mentioned and diagram concrete structure, but can be with
Many changes are made to it.For example, the elastic component of such as spring described above can be compression spring or other suitable forms
Elastic component.In addition, all components described here can be replaced by component equivalent in other technologies.The present invention's
Protection domain should be limited only by the following claims.
Claims (18)
1. a kind of hydraulic tool (1), including：
Working cell (10), the working cell (10) are suitable for operating workpiece；
Driving unit (20), the driving unit (20) are configured to be driven the working cell (10), and including cylinder
Body (21), the moving part that is arranged in the cylinder body (21) and can be moved between initial position and operating position (23,
25) and the elastic component (27) for biasing the moving part (23,25) towards the initial position, wherein, the cylinder body
(21) and the moving part (23,25) defines pressurized fluid to be filled to bias the movable part towards the operating position
Divide the chamber (26) of (23,25)；And
Pressure release unit (30), the pressure release unit (30) include hydraulic pressure releasing valve (32) and manual relief valve (31),
Wherein, the Fluid pressure that the hydraulic pressure releasing valve (32) is configured in the chamber (26) is opened when reaching predetermined threshold
So that chamber (26) pressure release so as to allow the moving part (23,25) towards the initial position move preset distance with
It provides a user and visually indicates, the preset distance is less than from the operating position to the distance of the initial position；The hand
Dynamic relief valve (31) is constructed to be permeable to manual unlocking with by the chamber (26) pressure release so that moving part (the 23,25) energy
Enough it is back to the initial position.
2. hydraulic tool (1) as described in claim 1, wherein, in the moving part (23,25) towards the initial position
When mobile, the working cell (10) provides towards the initial position together with the elastic component (27) and biases the movable part
Divide the elastic restoring force of (23,25), and when the moving part (23,25) reaches the preset distance, the job note
The elastic restoring force of first (10) is close to zero.
3. hydraulic tool (1) as described in claim 1, wherein, the hydraulic pressure releasing valve (32) is configured to allow for the chamber
(26) connected via the fluid passageway (34) being arranged in the cylinder body (21) with fluid source (90).
4. hydraulic tool (1) as claimed in claim 3, wherein, the fluid source (90) is located to be limited by the cylinder body (21)
Space in, and the hydraulic pressure releasing valve (32) is arranged in the fluid source (90).
5. hydraulic tool (1) as described in claim 1, wherein, the manual relief valve (31) is the form of check valve.
6. hydraulic tool (1) as described in claim 1, wherein, the manual relief valve (31) includes：The valve guard of fixed setting
(319), with the spool (317) of the valve guard (319) cooperation, for the valve rod (315) that makes the spool (317) mobile and
For making the first elastic component (313) that the valve rod (315) resets, the spool (317) is configured to abutting the valve guard
(319) prevent fluid from passing through the manual relief valve (31) when to be allowed fluid from when moving away the valve guard (319)
The manual relief valve (31).
7. hydraulic tool (1) as claimed in claim 6, wherein, the spool (317) is in hemispherical, and the spool
(317) hemisphere face coordinates with the valve guard (319).
8. hydraulic tool (1) as claimed in claim 6, wherein, the manual relief valve (31) further includes to bias described
Spool (317) is to abut the first elastic component (314) of the valve guard (319).
9. hydraulic tool (1) as described in claim 1, wherein, the pressure release unit (30) further includes to manually turn on
The control stick (311) of the manual relief valve (31), the control stick (311) are pivotally connected to the hydraulic tool by pin
(1) housing (80).
10. hydraulic tool (1) as described in claim 1, wherein, the hydraulic tool (1) further include be integrally disposed in it is described
Pumping unit (40) in cylinder body (21), the pumping unit (40) are configured to the fluid in fluid source (90) being pumped to described
In chamber (26).
11. hydraulic tool (1) as claimed in claim 10, wherein, the hydraulic pressure releasing valve (32) be also configured to it is described can
Dynamic part (23,25) reaches preset distance and the pumping unit (40) stops closing after to the chamber (26) pumped fluid
It closes.
12. hydraulic tool (1) as claimed in claim 10, wherein, the pumping unit (40) includes plunger pump.
13. hydraulic tool (1) as claimed in claim 10, wherein, connecting the pumping unit (40) and the fluid source
(90) check valve that fluid is allowed to flow into the pumping unit (40) from fluid source (90) is provided in fluid passageway.
14. hydraulic tool (1) as claimed in claim 10, wherein, connecting the pumping unit (40) and the chamber
(26) check valve that fluid is allowed to flow into the chamber (26) from the pumping unit (40) is provided in fluid passageway.
15. the hydraulic tool (1) as any one of claim 1 to 14, wherein, by least one of following items come
Determine the preset distance：The elastic component (27) of the driving unit (20), by the hydraulic pressure releasing valve (32) with it is described
The structure of the fluid passageway of chamber (26) connection, for biasing the valve plug of the hydraulic pressure releasing valve (32) and close the liquid
The elastic component for the fluid passageway that pressure relief valve (32) is connected with the chamber (26).
16. the hydraulic tool (1) as any one of claim 1 to 14, wherein, roller (22) is fixedly provided in described
So as to directly driving the working cell (10) on moving part (23,25), and the roller (22) be exposed to it is external or
Person provides described visually indicate via visual window.
17. the hydraulic tool (1) as any one of claim 1 to 14, wherein, the preset distance is more than 3mm.
18. the hydraulic tool (1) as any one of claim 1 to 14, wherein, the hydraulic tool (1) is crimping work
Tool or cutting implement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450368.2A CN105171698B (en) | 2015-07-28 | 2015-07-28 | Hydraulic tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450368.2A CN105171698B (en) | 2015-07-28 | 2015-07-28 | Hydraulic tool |
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| CN105171698A CN105171698A (en) | 2015-12-23 |
| CN105171698B true CN105171698B (en) | 2018-05-22 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105500278B (en) * | 2016-01-05 | 2017-08-15 | 艾默生管道工具(上海)有限公司 | Hydraulic tool |
| WO2017118444A1 (en) * | 2016-01-05 | 2017-07-13 | 艾默生管道工具(上海)有限公司 | Hydraulic tool |
| CN205996044U (en) * | 2016-01-19 | 2017-03-08 | 艾默生管道工具(上海)有限公司 | Hydraulic tool |
| US10428843B2 (en) * | 2016-06-08 | 2019-10-01 | Milwaukee Electric Tool Corporation | Hydraulic system of a tool |
| CN105922203B (en) * | 2016-06-21 | 2018-04-10 | 陈瑞峰 | A kind of hand-held hydraulic tools |
| US10265758B2 (en) * | 2016-09-30 | 2019-04-23 | Milwaukee Electric Tool Corporation | Power tool |
| WO2018065513A1 (en) * | 2016-10-07 | 2018-04-12 | Gustav Klauke Gmbh | Working tool |
| CN107681410A (en) * | 2017-10-20 | 2018-02-09 | 台州巨力工具有限公司 | One kind is exempted to change the mold crimping tool |
| CN213673947U (en) * | 2019-11-04 | 2021-07-13 | 苏州宝时得电动工具有限公司 | Power tool |
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| CN2407881Y (en) * | 2000-01-19 | 2000-11-29 | 浙江铭仕管业有限公司 | hand hydraulic pipe clamping and pressing device |
| CN2467274Y (en) * | 2001-02-28 | 2001-12-26 | 辽宁东沅管业有限公司 | Charging hydraulic tongs for crimp connecting bayonet pipe fittings |
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| CN205219041U (en) * | 2015-07-28 | 2016-05-11 | 艾默生管道工具(上海)有限公司 | Hydraulic tool |
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| JP3161993B2 (en) * | 1997-05-06 | 2001-04-25 | 石原機械工業株式会社 | Portable hydraulic processing machine |
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| CN2407881Y (en) * | 2000-01-19 | 2000-11-29 | 浙江铭仕管业有限公司 | hand hydraulic pipe clamping and pressing device |
| CN2467274Y (en) * | 2001-02-28 | 2001-12-26 | 辽宁东沅管业有限公司 | Charging hydraulic tongs for crimp connecting bayonet pipe fittings |
| CN101437636A (en) * | 2006-03-15 | 2009-05-20 | Fci公司 | Hydraulic tool release system |
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| CN105171698A (en) | 2015-12-23 |
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Address after: Shanghai Jiangtian road 201613 Songjiang Industrial Zone No. 89 Patentee after: Emerson precision tool technology (Shanghai) Co.,Ltd. Address before: Shanghai Jiangtian road 201613 Songjiang Industrial Zone No. 89 Patentee before: Emerson Professional Tools (Shanghai) Co.,Ltd. |