CN105922203A - Handheld hydraulic tool - Google Patents

Handheld hydraulic tool Download PDF

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Publication number
CN105922203A
CN105922203A CN201610464575.8A CN201610464575A CN105922203A CN 105922203 A CN105922203 A CN 105922203A CN 201610464575 A CN201610464575 A CN 201610464575A CN 105922203 A CN105922203 A CN 105922203A
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CN
China
Prior art keywords
oil
hydraulic
valve core
cylinder body
cylinder
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Granted
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CN201610464575.8A
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Chinese (zh)
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CN105922203B (en
Inventor
陈瑞峰
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China Railway Electrification Engineering Group Co Ltd
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陈瑞峰
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Publication of CN105922203A publication Critical patent/CN105922203A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Abstract

The invention provides a handheld hydraulic tool, belongs to the technical field of hydraulic tools, and solves the problem that a conventional electric hydraulic tool is complex in structure. The handheld hydraulic tool comprises a cylinder body, an oil storage cylinder and a hydraulic work head, wherein a pressure relief valve cavity is formed in the cylinder body; a floating pressure relief valve core capable of sliding in the pressure relief valve cavity is arranged in the pressure relief valve cavity; the pressure relief valve cavity is divided into a left cavity chamber and a right cavity chamber in such a manner that the contact surfaces of the floating pressure relief valve core and the pressure relief valve cavity are sealed; an oil inlet channel unilaterally communicates with the left cavity chamber; the cylinder body comprises liquid through holes and an oil return path; the liquid through holes are used for communicating the right cavity chamber with a hydraulic cavity; the oil return path is used for communicating the right cavity chamber with an oil return channel; the floating pressure relief valve core comprises a communicating through hole and a blocking head; the communicating through hole is used for communicating the left cavity chamber with the right cavity chamber; the blocking head extends into the right cavity chamber and can be used for blocking the oil inlet of the oil return path; and an elastic part capable of acting on the floating pressure relief valve core to separate the blocking head from the oil inlet of the oil return path is arranged in the right cavity chamber.

Description

A kind of hand-held hydraulic tools
Technical field
The invention belongs to hydraulic tool technical field, relate to a kind of hand-held hydraulic tools.
Background technology
Hand-held hydraulic tools is the lightest a kind of hydraulic tool, one-hand operation, Generally use rechargeable type design.The functions such as hand-held hydraulic tools can realize cutting off, crimping, Possess quick, light and handy, durable advantage, be extensively received by the market.
Existing hand-held hydraulic tools, such as, Chinese patent [application number 201210578428.5;Authorization Notice No. CN103072124B] disclosed in a kind of electronic liquid Pressure instrument, including body and the hydraulic end being positioned on body, the most internal have oil cylinder And shoe cream room, it is connected by oil circuit between oil cylinder and shoe cream room, body also has energy Power oil in shoe cream room is pressed into in-oil cylinder pressing mechanism, and hydraulic end is positioned at oil In cylinder, body has oil leak hole shoe cream room and oil cylinder being connected, body also has Have when its unlatching can make the switch module of pressing mechanism action, and switch module includes being connected in Switch on body and the handle being hinged on body, handle is energy after its hinged place swings Being resisted against on switch, switch, is switched by wired in series between pressing mechanism and power supply Have between assembly and oil leak hole when switch module opens the plug that can oil leak hole be closed Part, pressing mechanism uses plunger displacement pump and the motor that plunger displacement pump can be driven to work, hydraulic pressure Working end is card pressure head.
Above-mentioned Electric hydraulic tool controls plug part by handle and opens or block draining Hole, it is possible to in-oil cylinder pressure oil is carried out pressurize or pressure release more conveniently.But, This Electric hydraulic tool there is problems of, and the installation of plug part is in Electric hydraulic tool Offer installation cavity on body, and plug part should be positioned in the oil circuit of draining, again with This external handle is connected so that the structure complexity of Electric hydraulic tool, processing cost are relatively High.
Summary of the invention
It is an object of the invention to there are the problems referred to above for existing technology, it is proposed that a kind of Hand-held hydraulic tools, present invention solves the technical problem that it is how to realize oil-feed and draining Automatically switching makes hand-held hydraulic tools structure the simplest.
The purpose of the present invention can be realized by following technical proposal: a kind of hand-held hydraulic pressure work Tool, described hydraulic tool includes cylinder body, oil storage cylinder and hydraulic head, in described cylinder body Having hydraulic cavities, described hydraulic head is arranged on cylinder body and is connected with hydraulic cavities, institute There is in stating cylinder body connection oil storage cylinder and the oil inlet passage of hydraulic cavities, described cylinder body is arranged Have and drive hydraulic pressure in the hydraulic oil in oil storage cylinder can be transported to hydraulic cavities by oil inlet passage Work head action send oil machine structure, also there is in described cylinder body connection oil storage cylinder and hydraulic cavities Drainback passage, it is characterised in that there is in described cylinder body pressure release valve pocket, described pressure release The floating pressure releasing valve core slided at relief valve intracavity, described floating it is provided with in valve pocket Pressure releasing valve core and pressure release valve pocket contact surface seal and pressure release valve pocket are divided into left chamber and right chamber Room, described oil inlet passage to left chamber's unilaterally connected, described cylinder body has the right chamber of connection Room is crossed fluid through-hole with hydraulic cavities and connects the oil return line of right chamber and drainback passage, described There is on floating pressure releasing valve core the through hole that connects of connection left chamber and right chamber, described floating Have on pressure releasing valve core and stretch into right chamber and the block head of oil return line oil-in can be blocked, Being additionally provided with in described right chamber to act on makes block head depart from back on floating pressure releasing valve core The elastic component of oil circuit oil-in.
The operation principle of this hand-held hydraulic tools is: during use, starts and send oil machine structure, will Hydraulic oil in oil storage cylinder delivers to the left chamber of pressure release valve pocket, left chamber by oil inlet passage Pressure raise, pressure acts on and makes floating pressure releasing valve core overcome bullet on floating pressure releasing valve core Property part elastic force slide along pressure release valve pocket, the block head of floating pressure releasing valve core closure oil return line Oil-in, hydraulic oil cannot by oil return line enter drainback passage draining;Meanwhile, liquid Force feed enters right chamber by connection through hole from left chamber, and is led to by the liquid of crossing of right chamber Hole flows to hydraulic cavities and drives hydraulic head action.After use terminates, close and send oil machine structure, Oil inlet passage does not has hydraulic oil to enter left chamber, and the hydraulic oil in left chamber also cannot simultaneously It is back in oil inlet passage, owing to left chamber connects by connecting through hole with right chamber, left After chamber fuel cut-off, in left chamber and right chamber, the pressure of hydraulic oil progressivelyes reach balance, The restoring force of elastic component acts on and makes floating pressure releasing valve core along pressure release on floating pressure releasing valve core Valve pocket slides and resets, and block head departs from the oil-in of oil return line makes oil return line open-minded, hydraulic pressure The hydraulic oil of intracavity can flow back to right chamber by crossing fluid through-hole, and enters through oil return line Drainback passage returns in shoe cream room, it is achieved oil return.
This hand-held hydraulic tools is passed through to arrange pressure release valve pocket in cylinder body, relief valve intracavity Floating pressure releasing valve core is operationally pushed away by the high pressure liquid force feed entering left chamber from oil inlet passage Dynamic closure oil return line, after end-of-job, the hydraulic fluid pressure of relief valve intracavity reaches balance, Floating pressure releasing valve core resets under the restoring force effect of elastic component and makes oil return line open-minded.Oil return The closure on road and open-minded, is changed by the hydraulic fluid pressure of relief valve intracavity and makes floating pressure release Spool is controlled in the motion of pressure release valve pocket, it is achieved that oil-feed and the automatic switchover of oil return, Pressure release valve pocket is positioned at cylinder body and need not and be connected externally to lead to, floating without arranging drive The mechanical driving mechanism of dynamic pressure releasing valve core motion, so that this hand-held hydraulic tools structure is more For simply.
As a kind of scheme, in above-mentioned hand-held hydraulic tools, described pressure release valve pocket has There is the installing port opened towards hydraulic cavities, described installing port has been threaded connection oil return Plug, described fluid through-hole and oil return line excessively are respectively positioned on oil return plug.During assembling, float Pressure releasing valve core directly can load relief valve intracavity from installing port, then oil return plug is passed through spiral shell Stricture of vagina is screwed on installing port close pressure release valve pocket, and fluid through-hole and oil return line directly exist excessively The processing of oil return plug is accomplished on oil return plug, reduces processing and the difficulty of assembling.
In above-mentioned hand-held hydraulic tools, described oil return plug includes having externally threaded Connecting portion and the work portion stretching into relief valve intracavity, the outer peripheral face in described work portion has Annular oil guide groove, described oil return line is an at least oil-out in the bottom of annular oil guide groove, Described drainback passage is connected with annular oil guide groove, and described work portion also has with above-mentioned The annular seal groove in the adjacent and close relief valve intracavity portion of annular oil guide groove, described annular is close Sealing ring it is provided with in sealing groove.During oil return, the hydraulic oil entered from the oil-in of oil return line First can enter annular oil guide groove from the oil-out of oil return line, then enter through annular oil guide groove Enter in drainback passage, it is direct relative to oil return line and drainback passage that annular oil guide groove is set Connection reduces position accuracy demand when cylinder body and the assembling of oil return plug;Further, annular One end of oil guide groove is sealed by sealing member, and other end threaded engagement also has sealing effectiveness, Improve sealing, prevent the hydraulic fluid leak in annular oil guide groove.
In above-mentioned hand-held hydraulic tools, described fluid through-hole of crossing is through oil return plug two The straight hole of end face.Crossing the simple in construction of fluid through-hole, it is the easiest to process.
As preferably, in above-mentioned hand-held hydraulic tools, described cylinder body uses split type Structure, described cylinder body includes the operating cylinder of oil-feed cylinder and inner hollow, described oil-feed cylinder End has cylindrical union joint, and described union joint makes work in stretching into operating cylinder Forming described hydraulic cavities in oil cylinder, described installing port is positioned on the end face of union joint and with upper Stating hydraulic cavities to be connected, described oil-feed cylinder and operating cylinder are fixedly connected with.Such structure, Make oil-feed cylinder and operating cylinder structure the most relatively simple, and individually add in manufacturing link Work, reduces difficulty of processing and processing cost;Installing port is positioned at the connection head end of oil-feed cylinder On face, during assembling, can first complete the assembling of parts on oil-feed cylinder, then by work Oil cylinder is connected with oil-feed cylinder, greatly reduces assembly difficulty.
As further preferably, in above-mentioned hand-held hydraulic tools, described oil-feed cylinder and Operating cylinder passes through screw thread releasable connection.Use the mode of releasable connection, the energy when maintenance Enough operating cylinder is pulled down, convenient parts oil return plug pulled down to pressure release valve pocket energy It is replaced.
Alternatively, in above-mentioned hand-held hydraulic tools, described cylinder body uses Split-type structural, described cylinder body includes front-bank rotor housing and rear-bank rotor housing, has in described front-bank rotor housing Partition portion, described hydraulic cavities be positioned at partition portion front portion, described partition portion rear portion tool Cavity one, described rear-bank rotor housing front portion is had to have and above-mentioned cavity one position and shape one a pair The cavity two answered, described front-bank rotor housing and rear-bank rotor housing are fixed connection and are made cavity one and cavity two-phase Company forms described pressure release valve pocket, and described fluid through-hole and oil return line excessively are respectively positioned in partition portion.
In above-mentioned hand-held hydraulic tools, the diameter of described floating pressure releasing valve core is less than letting out The diameter in pressure valve chamber, described floating pressure releasing valve core lateral surface at least has two and pressure release The butting section that valve pocket shapes and sizes match, the gap shape between two described butting sections Becoming to install the mounting groove of sealing ring, described floating pressure releasing valve core lateral surface is near oil inlet passage The lateral surface of outlet also has the forced section of projection.The butting section of floating pressure releasing valve core can With the contact internal walls of pressure release valve pocket, realize left chamber and the sealing of right chamber by sealing ring, Such structure had both enable floating pressure releasing valve core slide swimmingly at relief valve intracavity, again Ensure that sealing;Hydraulic oil can act on forced section and increase floating pressure releasing valve core Thrust;Butting section, forced section and Oil Guide passage process on floating pressure releasing valve core, The structure making pressure release valve pocket is the simplest, reduces difficulty of processing.
As preferably, in above-mentioned hand-held hydraulic tools, on described floating pressure releasing valve core Also have and can will lead to described forced section towards entering from the hydraulic oil near oil inlet passage outlet The Oil Guide passage of the side of oil channel outlet.When floating pressure releasing valve core is positioned at initial position, The end of floating pressure releasing valve core is close to the outlet of oil inlet passage, and Oil Guide passage can be by The hydraulic oil in the exit of oil inlet passage is guided on forced section so that floating pressure release during use The slip of spool is the rapidest and smooth and easy.
In above-mentioned hand-held hydraulic tools, described floating pressure releasing valve core is positioned at left chamber There is inside one end installing hole, in described installing hole, be provided with steel ball and back-moving spring, institute The spring-force driven dual stating back-moving spring makes steel ball can block going out of oil inlet passage on steel ball Mouthful.Steel ball and back-moving spring are installed in the installing hole of floating pressure releasing valve core one end, add Work and assembling are more convenient.
As preferably, in above-mentioned hand-held hydraulic tools, described back-moving spring is taper Spring.After volute spring stress, the part of ringlet can be locked in the part of great circle so that The volume of volute spring is less, is ensureing that the space taken while elastic force is less.
Compared with prior art, the advantage of this hand-held hydraulic tools is, this hand-held hydraulic pressure Instrument arranges pressure release valve pocket in cylinder body, by being positioned at the floating relief valve of relief valve intracavity Core is motion closure oil return line, floating during oil return under the pressure effect of hydraulic oil when oil-feed Pressure releasing valve core resets and makes oil return line open-minded, thus realizes the automatic switchover of oil-feed and oil return, Make this hand-held hydraulic tools structure the simplest.
Accompanying drawing explanation
Fig. 1 is the structural representation of this hand-held hydraulic tools.
Fig. 2 is the broken section structural representation under this hand-held hydraulic tools oil-feed state.
Fig. 3 is the partial enlarged drawing in Fig. 2 at A.
Fig. 4 is the broken section knot of another angle under this hand-held hydraulic tools oil-feed state Structure schematic diagram.
Fig. 5 is the partial enlarged drawing in Fig. 4 at B.
Fig. 6 is the broken section structural representation under this hand-held hydraulic tools oil return state.
Fig. 7 is that the structure of the floating pressure releasing valve core of this hand-held hydraulic tools in embodiment one is shown It is intended to.
Fig. 8 is the structural representation of the oil return plug of this hand-held hydraulic tools.
Fig. 9 is that the structure of the floating pressure releasing valve core of this hand-held hydraulic tools in embodiment four is shown It is intended to.
Figure 10 is the section view of the floating pressure releasing valve core of this hand-held hydraulic tools in embodiment four Structural representation.
Figure 11 is the structural representation of the oil-feed cylinder of this hand-held hydraulic tools in embodiment one.
Figure 12 is the structural representation of the operating cylinder of this hand-held hydraulic tools in embodiment one Figure.
In figure, 1, cylinder body;1a, oil-feed cylinder;1a1, union joint;1b, operating cylinder; 2, hydraulic cavities;3, oil inlet passage;4, drainback passage;5, pressure release valve pocket;5a, a left side Chamber;5b, right chamber;5c, installing port;6, floating pressure releasing valve core;6a, connection are led to Hole;6b, block head;6c, butting section;6d, mounting groove;6e, forced section;6f、 Oil Guide passage;6g, installing hole;7, fluid through-hole is crossed;8, oil return line;9, elastic component; 10, oil return plug;10a, connecting portion;10b, work portion;10c, annular oil guide groove; 10d, annular seal groove;11, sealing ring;12, steel ball;13, back-moving spring;14、 Send oil machine structure;15, oil storage cylinder;16, hydraulic head.
Detailed description of the invention
The following is the specific embodiment of the present invention and combine accompanying drawing, the technical side to the present invention Case is further described, but the present invention is not limited to these embodiments.
Embodiment one:
This hand-held hydraulic tools includes cylinder body 1, oil storage cylinder 15, hydraulic head 16, liquid Pressure chamber 2, oil inlet passage 3, drainback passage 4, send oil machine structure 14, pressure release valve pocket 5, floating Move pressure releasing valve core 6, cross fluid through-hole 7, oil return line 8, connection through hole 6a, block head 6b With elastic component 9.
As depicted in figs. 1 and 2, hydraulic cavities 2 is positioned at cylinder body 1, hydraulic head 16 Being arranged on cylinder body 1 and be connected with hydraulic cavities 2, oil inlet passage 3 is for by oil storage cylinder 15 Interior hydraulic oil is transported in hydraulic cavities 2, and drainback passage 4 is the hydraulic pressure in hydraulic cavities 2 Oil returns to the path of oil storage cylinder 15.As shown in Figure 1 and Figure 4, oil machine structure 14 is sent to arrange Cylinder body 1 provides power, the present embodiment for hydraulic oil conveying in oil inlet passage 3 In, send oil machine structure 14 to be driven the plunger displacement pump of plunger motion by eccentric for motor.In reality In the production on border and manufacture process, send oil machine structure 14 can also use other liquid such as gear pump Press pump structure.
As depicted in figs. 1 and 2, in the present embodiment, cylinder body 1 uses split-type structural, Cylinder body 1 includes oil-feed cylinder 1a and operating cylinder 1b.As shown in figure 11, oil-feed cylinder 1a End has cylindrical union joint 1a1.As shown in figure 12, in operating cylinder 1b Portion's hollow.Union joint 1a1 forms liquid in making operating cylinder 1b in stretching into operating cylinder 1b Pressure chamber 2, oil-feed cylinder 1a and operating cylinder 1b is fixedly connected with.Preferably, oil-feed Cylinder 1a and operating cylinder 1b passes through screw thread releasable connection, uses the mode of releasable connection, Operating cylinder 1b can be pulled down when maintenance, the convenient maintenance to oil-feed cylinder 1a.
As shown in Fig. 2, Fig. 3 and Figure 11, pressure release valve pocket 5 is positioned at oil-feed cylinder 1a, Pressure release valve pocket 5 has the peace opened on the end face being positioned at union joint 1a1 and relative to the external world After dress mouth 5c, oil-feed cylinder 1a and operating cylinder 1b connect, installing port 5c and hydraulic cavities 2 Being connected, the size of floating pressure releasing valve core 6, less than the size of pressure release valve pocket 5, makes floating Pressure releasing valve core 6 can load pressure release valve pocket 5, and the oil return that installing port 5c is threaded connection is blocked up 10 block.As it is shown in fig. 7, there are two on floating pressure releasing valve core 6 lateral surface The butting section 6c matched with pressure release valve pocket 5 shapes and sizes, makes floating pressure releasing valve core 6 Can slide in pressure release valve pocket 5.It is close that gap between two butting section 6c forms installation The mounting groove 6d of seal 11, floating pressure releasing valve core 6 seals with pressure release valve pocket 5 contact surface Pressure release valve pocket 5 is divided into left chamber 5a and right chamber 5b.Outside floating pressure releasing valve core 6 Face also has the forced section 6e of projection, hydraulic oil near the lateral surface that oil inlet passage 3 exports Forced section 6e can be acted on and increase the thrust to floating pressure releasing valve core 6.
As shown in Figures 2 and 3, left chamber 5a connects with oil inlet passage 3, floating pressure release Spool 6 is positioned at inside one end of left chamber 5a and has installing hole 6g, sets in installing hole 6g Being equipped with steel ball 12 and back-moving spring 13, the spring-force driven dual of back-moving spring 13 is at steel ball 12 On make steel ball 12 can block the outlet of oil inlet passage 3.Preferably, back-moving spring 13 is volute spring, and after volute spring stress, the part of ringlet can be locked into the part of great circle In so that the volume of volute spring is less, and the space taken while guarantee elastic force is more Little.
As shown in Figure 8, oil return plug 10 includes having externally threaded connecting portion 10a and stretch Enter the work portion 10b in pressure release valve pocket 5, the outer peripheral face of work portion 10b has annular Oil guide groove 10c.As shown in Figure 4 and Figure 5, cross fluid through-hole 7 to be positioned on oil return plug 10 And connect right chamber 5b and hydraulic cavities 2, and the quantity crossing fluid through-hole 7 is two, each Cross the both ends of the surface of fluid through-hole 7 the most through oil return plug 10;Oil return line 8 is positioned at oil return plug On 10, and oil return line 8 in the bottom of annular oil guide groove 10c an at least oil-out, Drainback passage 4 is connected with annular oil guide groove 10c, and work portion 10b also has and ring Shape oil guide groove 10c is adjacent and near annular seal groove 10d within pressure release valve pocket 5, ring It is provided with sealing ring 11 in shape seal groove 10d.
As shown in Figures 2 and 3, floating pressure releasing valve core 6 has connection left chamber 5a With right chamber 5b connect through hole 6a, it is close that block head 6b is positioned at floating pressure releasing valve core 6 Right chamber 5b is also stretched in one end of right chamber 5b, and in the present embodiment, block head 6b is circle Taper, floating pressure releasing valve core 6 slides and the end of block head 6b can be made to be inserted back into oil circuit 8 Oil-in, thus block oil return line 8.Elastic component 9 is arranged in right chamber 5b, elastic Part 9 one end is resisted against on oil return plug 10, and the other end is resisted against floating pressure releasing valve core 6 On, the elastic force of elastic component 9 makes the block head 6b on floating pressure releasing valve core 6 depart from oil return line 8 oil-ins.Floating pressure releasing valve core 6 is arranged in pressure release valve pocket 5, and at hydraulic oil Pressure varying motion, it is achieved oil-feed and the automatic switchover of oil return, pressure release valve pocket 5 is with extraneous Do not connect, it is to avoid the hydraulic fluid leak in pressure release valve pocket 5 so that this hand-held hydraulic pressure work The fault of leakage of oil is less likely to occur tool, uses the most reliable.In the present embodiment, elastic component 9 is spring, and in actual production and manufacture process, elastic component 9 can also use bullet Sheets etc. have resilient parts.
The operation principle of this hand-held hydraulic tools is: during use, starts and send oil machine structure 14, Being transported in oil inlet passage 3 by hydraulic oil in oil storage cylinder 15, hydraulic oil backs down steel ball In the 12 left chamber 5a entering pressure release valve pocket 5, and floating pressure releasing valve core 6 is driven to overcome The elastic force of elastic component 9 slides along pressure release valve pocket 5, makes the block head of floating pressure releasing valve core 6 The oil-in of 6b closure oil return line 8, as in figure 2 it is shown, hydraulic oil cannot pass through oil return line 8 enter drainback passage 4 draining;Meanwhile, hydraulic oil is by connecting through hole 6a from left chamber 5a enters right chamber 5b, and flows to hydraulic cavities 2 by the fluid through-hole 7 of crossing of right chamber 5b, And drive hydraulic head 16 action.After use terminates, close and send oil machine structure 14, enter Oil passage 3 does not has hydraulic oil to enter left chamber 5a, and steel ball 12 drives at back-moving spring 13 Lower closure oil inlet passage 3, makes the hydraulic oil in left chamber 5a cannot be back to oil inlet passage In 3, owing to left chamber 5a and right chamber 5b connects by connecting through hole 6a, left chamber In 5a and right chamber 5b, the pressure of hydraulic oil progressivelyes reach balance, floating pressure releasing valve core 6 Resetting under the effect of elastic component 9, block head 6b departs from the oil-in of oil return line 8 to be made back Oil circuit 8 is open-minded, and as shown in Figure 6, the hydraulic oil in hydraulic cavities 2 can lead to by crossing liquid Right chamber 5b is flowed back in hole 7, and enters in annular oil guide groove 10c from oil return line 8, and leads to Cross drainback passage 4 and return in shoe cream room, it is achieved oil return.
Embodiment two:
Technical scheme in the present embodiment is essentially identical with the technical scheme in embodiment one, Difference is, in the present embodiment, cylinder body 1 uses monolithic construction.
Embodiment three:
Compared with the technical scheme in embodiment one, cylinder body 1 also uses split-type structural, Difference is, in the present embodiment, is not provided with installing port 5c and oil return plug 10.For Floating pressure releasing valve core 6 is loaded in pressure release valve pocket 5, cylinder body 1 is divided into front-bank rotor housing and Rear-bank rotor housing, has partition portion in front-bank rotor housing, hydraulic cavities 2 be positioned at partition portion front portion, The rear portion in partition portion has cavity one, rear-bank rotor housing front portion have with above-mentioned cavity one position and Shape cavity two one to one, front-bank rotor housing and rear-bank rotor housing are fixed connection and are made cavity one and sky Chamber two is connected to form pressure release valve pocket 5, crosses fluid through-hole 7 and oil return line 8 is respectively positioned on partition portion On.
Embodiment four:
In technical scheme in the present embodiment and embodiment one, embodiment two and embodiment three Technical scheme essentially identical, difference is, as shown in Figure 9 and Figure 10, this reality Execute in example, floating pressure releasing valve core 6 also has and can will export near oil inlet passage 3 Hydraulic oil leads to the Oil Guide passage of the side that described forced section 6e exports towards oil inlet passage 3 6f.When floating pressure releasing valve core 6 is positioned at initial position, the end of floating pressure releasing valve core 6 Outlet with oil inlet passage 3 is close to, and Oil Guide passage 6f can going out oil inlet passage 3 Hydraulic oil at Kou is guided on forced section 6e so that the cunning of floating pressure releasing valve core 6 during use Dynamic the rapidest and smooth and easy.During the actual manufacturing, Oil Guide passage 6f can be straight Connect from floating pressure releasing valve core 6 outer wall through installing hole 6g so that enter in installing hole 6g Hydraulic oil be directed to forced section 6e, decrease the pressure loss of hydraulic oil.
Specific embodiment described herein is only to present invention spirit theory for example Bright.Those skilled in the art can be to described specific embodiment Make various amendment or supplement or use similar mode to substitute, but without departing from The spirit of the present invention or surmount scope defined in appended claims.
Although the most more employing cylinder body 1, oil-feed cylinder 1a, union joint 1a1, work Make oil cylinder 1b, hydraulic cavities 2, oil inlet passage 3, drainback passage 4, pressure release valve pocket 5, a left side Chamber 5a, right chamber 5b, installing port 5c, floating pressure releasing valve core 6, connection through hole 6a, Block head 6b, butting section 6c, mounting groove 6d, forced section 6e, Oil Guide passage 6f, peace Fill hole 6g, cross fluid through-hole 7, oil return line 8, elastic component 9, oil return plug 10, connection Portion 10a, work portion 10b, annular oil guide groove 10c, annular seal groove 10d, sealing ring 11, steel ball 12, back-moving spring 13, send the terms such as oil machine structure 14, but be not precluded from making By the probability of other term.Use these terms to be only used to more easily to describe and Explain the essence of the present invention;Being construed as any additional restriction is all and this Spirit is contrary.

Claims (10)

1. a hand-held hydraulic tools, described hydraulic tool includes cylinder body (1), oil storage cylinder And hydraulic head (16) (15), there is in described cylinder body (1) hydraulic cavities (2), Described hydraulic head (16) is arranged on cylinder body (1) and above and is connected with hydraulic cavities (2), The oil-feed in described cylinder body (1) with connection oil storage cylinder (15) and hydraulic cavities (2) is led to Road (3), described cylinder body (1) is provided with and can be led to by the hydraulic oil in oil storage cylinder (15) Crossing in oil inlet passage (3) is transported to hydraulic cavities (2) drives hydraulic head (16) to move That makees send oil machine structure (14), also has connection oil storage cylinder (15) in described cylinder body (1) Drainback passage (4) with hydraulic cavities (2), it is characterised in that in described cylinder body (1) There is pressure release valve pocket (5), be provided with at pressure release valve pocket in described pressure release valve pocket (5) (5) in slide floating pressure releasing valve core (6), described floating pressure releasing valve core (6) with let out Pressure valve chamber (5) contact surface seals and pressure release valve pocket (5) is divided into left chamber (5a) and the right side Chamber (5b), described oil inlet passage (3) arrives left chamber (5a) unilaterally connected, described There is on cylinder body (1) fluid through-hole (7) excessively connecting right chamber (5b) with hydraulic cavities (2) With the oil return line (8) connecting right chamber (5b) and drainback passage (4), described floating is let out Have connection left chamber (5a) and right chamber (5b) on pressure valve core (6) connects through hole (6a), described floating pressure releasing valve core (6) has stretch into right chamber (5b) can The block head (6b) of closure oil return line (8) oil-in, in described right chamber (5b) also Being provided with to act on makes block head (6b) depart from oil return line on floating pressure releasing valve core (6) (8) elastic component (9) of oil-in.
Hand-held hydraulic tools the most according to claim 1, it is characterised in that described Pressure release valve pocket (5) has the installing port (5c) opened towards hydraulic cavities (2), described peace Oil return plug (10), described fluid through-hole (7) excessively it has been threaded connection on dress mouth (5c) It is respectively positioned on oil return plug (10) with oil return line (8).
Hand-held hydraulic tools the most according to claim 2, it is characterised in that described Oil return plug (10) includes having externally threaded connecting portion (10a) and stretch into pressure release valve pocket (5) the work portion (10b) in, the outer peripheral face of described work portion (10b) has ring Shape oil guide groove (10c), described oil return line (8) is in the bottom of annular oil guide groove (10c) An at least oil-out, described drainback passage (4) and annular oil guide groove (10c) phase Connection, described work portion (10b) also has and above-mentioned annular oil guide groove (10c) phase The annular seal groove (10d) that adjacent and close pressure release valve pocket (5) is internal, described ring packing Sealing ring (11) it is provided with in groove (10d).
Hand-held hydraulic tools the most according to claim 2, it is characterised in that described Cross the straight hole that fluid through-hole (7) is through oil return plug (10) both ends of the surface.
Hand-held hydraulic tools the most according to any one of claim 1 to 4, it is special Levy and be, described cylinder body (1) use split-type structural, described cylinder body (1) include into The operating cylinder (1b) of oil cylinder (1a) and inner hollow, described oil-feed cylinder (1a) end Having cylindrical union joint (1a1), described union joint (1a1) stretches into operating cylinder (1b) described hydraulic cavities (2), described installing port are formed in making operating cylinder (1b) in (5c) it is positioned on the end face of union joint (1a1) and is connected with above-mentioned hydraulic cavities (2), Described oil-feed cylinder (1a) and operating cylinder (1b) are fixedly connected with.
Hand-held hydraulic tools the most according to claim 5, it is characterised in that described Oil-feed cylinder (1a) and operating cylinder (1b) are by screw thread releasable connection.
Hand-held hydraulic tools the most according to any one of claim 1 to 4, it is special Levying and be, described cylinder body (1) uses split-type structural, before described cylinder body (1) includes Cylinder body and rear-bank rotor housing, have partition portion in described front-bank rotor housing, described hydraulic cavities (2) is positioned at Partition portion front portion, the rear portion in described partition portion has cavity one, before described rear-bank rotor housing Portion has and above-mentioned cavity one position and shape cavity two one to one, described front-bank rotor housing Fixing connection with rear-bank rotor housing makes cavity one and cavity two be connected to form described pressure release valve pocket (5), Described fluid through-hole (7) and oil return line (8) excessively are respectively positioned in partition portion.
Hand-held hydraulic tools the most according to any one of claim 1 to 4, it is special Levying and be, the diameter of described floating pressure releasing valve core (6) is interior less than pressure release valve pocket (5) Footpath, described floating pressure releasing valve core (6) lateral surface at least has two and pressure release valve pocket (5) The butting section (6c) that shapes and sizes match, between two described butting sections (6c) Gap forms the mounting groove (6d) installing sealing ring (11), described floating pressure releasing valve core (6) Lateral surface also has the forced section (6e) of projection near the lateral surface that oil inlet passage (3) exports.
Hand-held hydraulic tools the most according to claim 8, it is characterised in that described Also having on floating pressure releasing valve core (6) can be from the liquid exported near oil inlet passage (3) Force feed leads to the Oil Guide of the side that described forced section (6e) exports towards oil inlet passage (3) Passage (6f).
Hand-held hydraulic tools the most according to any one of claim 1 to 4, its Being characterised by, described floating pressure releasing valve core (6) is positioned at inside one end of left chamber (5a) There is installing hole (6g), be provided with steel ball (12) in described installing hole (6g) and reset Spring (13), the spring-force driven dual of described back-moving spring (13) makes on steel ball (12) Steel ball (12) can block the outlet of oil inlet passage (3).
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CN110299679A (en) * 2019-07-05 2019-10-01 中铁电气化局集团有限公司 A kind of quick break wire device of pocket lithium electricity

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CN110299679A (en) * 2019-07-05 2019-10-01 中铁电气化局集团有限公司 A kind of quick break wire device of pocket lithium electricity

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