阅读说明：本技术 增压器 (Booster ) 是由 浅叶毅 五十岚正士 佐藤亮辅 于 2018-02-26 设计创作，主要内容包括：一种增压器(10)配备有设置在中心单元(20)两侧的一对缸体(12a,12b),每个设置在该对缸体内的活塞(14a,14b)和连接活塞的活塞杆(26),其中每个缸体具有驱动室(34a,34b)和由其中的活塞分隔的增压室(36a,36b),并且其中增压器还配备有切换阀(18)和复位阀(98),切换阀(18)通过抵接每个活塞而被切换,复位阀(98)设置在将供给端口(45)连接到一对驱动室中的一个的流体通道中。(A kind of a pair of of the cylinder body (12a of booster (10) equipped with centrally disposed unit (20) two sides, 12b), it is each to be arranged in the piston (14a intracorporal to cylinder, 14b) and connection piston piston rod (26), wherein each cylinder body has drive chamber (34a, pumping chamber (36a 34b) and by piston therein separated, 36b), and wherein booster is further equipped with switching valve (18) and resets valve (98), switching valve (18) is switched by abutting each piston, valve (98) are resetted to be arranged in one fluid channel that supply port (45) is connected in a pair of of drive chamber.)

1. a kind of booster (10,110) characterized by comprising

Center cell (20)；

A pair of of cylinder body (12a, 12b), two sides of the pair of cylinder body (12a, the 12b) setting in the center cell (20)；

Piston (14a, 14b), each piston (14a, 14b) setting is in the pair of cylinder body (12a, 12b)；

Piston rod (26), the piston rod (26) connect the pair of piston (14a, 14b)；

Supply port (45), the supply port (45) are supplied with pressure fluid；

Output port (47), the output port (47) is for exporting boost pressure fluid；With

Discharge port (48), the discharge port (48) is for being discharged the pressure fluid；

The wherein drive that each cylinder body (12a, 12b) has pumping chamber (36a, 36b) and separated by the piston (14a, 14b) Dynamic room (34a, 34b)；And

Wherein the booster (10,110) further comprises:

Switching valve (18), the switching valve (18) is switched by abutting each piston (14a, 14b), so that described one One or the other in drive chamber (34a, 34b) is connected to the supply port (45) and makes the pair of drive chamber Another or one in (34a, 34b) are connected to the discharge port (48)；With

It resets valve (98,112), reset valve (98, the 112) setting is connecting the supply port (45) and the pair of driving In one fluid channel in room (34a, 34b).

2. booster (10,110) according to claim 1, which is characterized in that wherein the switching valve (18) is integrated to institute It states in center cell (20), and includes:

A pair of push rods (66a, 66b), the pair of push rod (66a, 66b) are able to be connected on the piston (14a, 14b)； With

Spool (64), the spool (64) are slided by the pair of push rod (66a, 66b).

3. booster (10,110) according to claim 1, which is characterized in that wherein:

The reset valve (98,112) is configured to normally close valve, can switch to the supply port (45) and the pair of drive chamber The connected state or dissengaged positions between one in (34a, 34b), and communicating position can be manually switched to.

4. booster (110) according to claim 3, which is characterized in that wherein:

When receiving the Fluid pressure in the drive chamber (34a) as pilot pressure, reset valve (112) operation is to switch To the communicating position.

5. booster (10) according to claim 3, which is characterized in that wherein:

The reset valve (98) is integrated in the center cell (20).

Technical field

The present invention relates to a kind of boosters for being pressurized by the reciprocating motion of piston with output pressure fluid.

Background technique

So far, it is known that a kind of booster can be at this equipped with the cylinder body on opposite sides of centrally disposed unit The piston slided in a little cylinder bodies, and the piston rod for enabling piston integrally to move back and forth.In the booster, each cylinder body The pumping chamber of inside and the drive chamber in outside are separated by piston.When the piston of side passes through the drive chamber from switching valve to side Compressed air supply and when sliding, the compressed air in the pumping chamber of the cylinder body of side is pressurized to export.Then, work as work Switch switching valve when plug is close to end of travel, then, by the drive chamber of the cylinder body of the compressed air supply other side, thus the other side Cylinder body pumping chamber in compressed air be pressurized with export.By repeating the operation, pressure continuously can be pressurized and exported Force flow body.

In the field of the switching valve of booster, present applicant proposes a kind of by main valve and guiding (pilot) The switching valve that valve is constituted, main valve is by being supplied to guide chamber and from the air-operated of guide chamber discharge, for that will drive compressed air A pair of of drive chamber is switched to output driving compressed air, guide valve is operable to supply or be discharged air by piston press To guide chamber (announcing No.10-267002 referring to Japanese Laid-Open Patent).

Summary of the invention

The present invention is completed in view of above-mentioned proposal, even if its purpose is to provide one kind due to supplying adding to it The booster pressed decline of fluid etc. and restart switching valve can also easily when stopping at center.

Booster according to the present invention is characterized in that including center cell, a pair of of cylinder of centrally disposed unit two sides Body, it is each to be arranged in the intracorporal piston of a pair of of cylinder, the piston rod to piston is connected, the supply side of pressure fluid is supplied with Mouthful, for exporting the output port of boost pressure fluid, and for the discharge port of discharge pressure fluid, wherein each cylinder body With pumping chamber and the drive chamber separated by piston, and wherein, booster further includes switching valve and resets valve, and switching valve passes through It abuts each piston and is switched, so that one or the other in a pair of of drive chamber is connected to supply port, and make a pair of of drive Another or one in dynamic room be connected tos with discharge port, reset valve is arranged in connection supply port and a pair of drive chamber one In a fluid channel.

According to above-mentioned booster, even if when the decline of pressurized fluid of switching valve due to being supplied to it etc. stops at center When position, can also easily it restart.

In above-mentioned booster, it is preferred that switching valve is integrated in center cell and equipped with a pair of push rods and valve Core, a pair of push rods can be connected on piston respectively, and spool is slided by a pair of push rods.Using this structure, switching valve becomes It obtains simply, mechanically operates.

Moreover it is preferred that resetting valve is configured to normally close valve, one in supply port and a pair of of drive chamber can switch to Connected state or dissengaged positions between a, and communicating position can be manually switched to.Using this structure, even if working as switching valve When stopping at center, booster can also be reliably restarted manually.

In this case, resetting valve can be when the Fluid pressure in one drive chamber of reception is as pilot pressure It is operated when (pilot pressure) to be switched to the reset valve of communicating position.Using this structure, even if when switching valve stops At center, when the Fluid pressure in a drive chamber is higher than predetermined value, switching valve is operated to restart booster.

It is integrated in center cell moreover it is preferred that resetting valve.Using this structure, can simplify multiple for being arranged The flow channel structure of position valve.

Booster according to the present invention is provided with reset valve, and supply port is being connected to a pair of of driving by reset valve setting In one flow channel in room, and even if during switching valve to decline of Fluid pressure etc. that it is supplied due to being parked in It also can easily be restarted when heart position.

In conjunction with attached drawing, by being described below, above and other purpose of the invention, feature and advantage will become brighter It is aobvious, wherein to show the preferred embodiment of the present invention by illustrated examples.

Detailed description of the invention

Fig. 1 is the front view of booster according to a first embodiment of the present invention；

Fig. 2 is the right side view of booster shown in FIG. 1；

Fig. 3 is the cross-sectional view of the III-III line in Fig. 2；

Fig. 4 is the cross-sectional view of the IV-IV line in Fig. 2；

Fig. 5 is the partial enlarged view of a part of Fig. 3；

Fig. 6 is the schematic diagram that entire booster shown in FIG. 1 is illustrated with circuit；With

Fig. 7 is the schematic diagram that entire booster according to a second embodiment of the present invention is illustrated with circuit.

Specific embodiment

Hereinafter, preferred embodiment will be based on reference to attached drawing describe booster according to the present invention.

As shown in Figure 1 to Figure 4 and shown in Fig. 6, appended drawing reference 10 indicates booster according to a first embodiment of the present invention.This implementation Example in booster 10 be arranged in as the source of supply of pressure fluid (forced air, compressed air) compressor (not shown) and By between the actuator (not shown) of booster compression air-operated.

As shown in figure 3, booster 10 has cylinder mechanism, which includes a pair of cylinder barrel (cylinder body) 12a, 12b and a pair Piston 14a, 14b, and booster 10 also have setting this to cylinder barrel 12a, center cell 20 between 12b, and including Regulating valve 16 and switching valve 18.

Each cylinder barrel 12a, 12b are formed as cylindrical, and are closed at its opposite both ends by end plate 22a, 22b.Each work 14a is filled in, 14b is movably disposed at cylinder barrel 12a, and in 12b, and piston seal 24 is assemblied in each piston 14a, 14b's In annular groove on outer surface.

As shown in figure 4, a pair of pistons 14a, 14b are entirely connected by piston rod 26.Center cell 20 is in center portion Respectively with rod aperture 28.Rod aperture 28 penetrates center cell 20, and moveable piston on (direction arrow A-B) in the axial direction Bar 26 is inserted into rod aperture 28.

As shown in figure 3, in each cylinder barrel 12a, the inside of 12b is formed with piston 14a, the cylinder chamber that 14b is inserted respectively 30a, 30b.Fluid channel 32a, 32b are respectively parallel to cylinder chamber 30a, and 30b is formed.Each fluid channel 32a, 32b and cylinder chamber 30a, 30b are formed separately, and respectively with cylinder barrel 12a, cylinder chamber 30a, 30b connection on the end side of 12b, in cylinder barrel 12a, 12b's End plate 22a, 22b are attached on end side.

Each cylinder chamber 30a, 30b are respectively classified into drive chamber 34,34b and pumping chamber 36a, 36b.Each drive chamber 34a, 34b Be arranged between piston 14a, 14b and end plate 22a, 22b, and pressure fluid is supplied to each drive chamber 34a, 34b or from Each drive chamber 34a, 34b discharge.Each pumping chamber 36a, 36b are arranged between piston 14a, 14b and center cell 20, and grasp Make with boost pressure fluid.Each fluid channel 32a, 32b pass through first passage 38a, 38b and cylinder chamber 30a, the drive of 30b respectively Dynamic room 34a, 34b connection.

In cylinder barrel 12a, the outside of 12b, multiple connecting rods 40 are inserted into another end plate 22b from an end plate 22a, and from The end part of end plate 22b connecting rod 40 outstanding is fastened by nut 42.Therefore, center cell 20 is maintained at cylinder barrel 12a and cylinder barrel 12b Between.Center cell 20 includes centerbody 44 and the opposite end for the axial direction (direction arrow A-B) for being attached to centerbody 44 A pair of side plates 46.

Centerbody 44 has the supply port 45 for being fed with the pressure fluid from compressor, for (not showing to actuator The output port 47 of boost pressure fluid, and the discharge port 48 for discharge pressure fluid are exported out).Supply port 45 connects It is connected to introduction passage 50, introduction passage 50 is located in centerbody 44, is connected to a pair of pumping chamber 36a, 36b (referring to fig. 4), and Supply port 45 is also connected to the feed path 52 in centerbody 44, and feed path 52 passes through switching valve 18 (referring to Fig. 3) It is connected to a pair of of fluid channel 32a, any of 32b.Feed path 52 is provided with regulating valve 16, the pressure at output port 47 Power is fed back to regulating valve 16, so that can adjust when the handle 54 on the upper part of centrally disposed body 44 is rotated by worker Save the flow of pressure fluid.

As shown in figure 4, between 36b, it is provided with first check-valve 56a in introduction passage 50 and corresponding pumping chamber 36a, 56b for allowing fluid to flow to pumping chamber 36a, 36b from introduction passage 50, but prevents fluid from flowing to from pumping chamber 36a, 36b Introduction passage 50.Output port 47 is connected to extraction channel 58, and extraction channel 58 is located in centerbody 44, with a pair of of pumping chamber 36a, 36b connection.Between extraction channel 58 and corresponding pumping chamber 36a, 36b, it is provided with second check-valve 60a, 60b, is used Extraction channel 58 is flowed to from pumping chamber 36a, 36b in permission fluid, but fluid is prevented to flow to pumping chamber 36a from extraction channel 58, 36b.First check-valve 56a, 56b and second check-valve 60a, 60b are integrated in centerbody 44 by using side plate 46.

As shown in figure 5, switching valve 18 is equipped with the valve component 62 being integrated in centerbody 44 by using side plate 46, it can The spool 64 slided in valve component 62, and it is projected into corresponding pumping chamber 36a, a pair of push rods 66a in 36b respectively, 66b.Valve component 62 includes cylindrical sleeve 68 and a pair of of the side valve body 70 for being arranged in 68 two sides of sleeve.

The central portion of sleeve 68 (direction arrow A-B) in the axial direction is provided with ingress port 72, and in entrance The two sides of port 72 are provided with a pair of of the outlet port 76a, 76b separated in the axial direction with ingress port 72.Ingress port 72 are connected to feed path 52, and corresponding outlet port 76a, 76b pass through second channel 74a respectively, and 74b is connected to fluid Channel 32a, 32b.In addition, being respectively arranged with a pair of of the passing away 78 for being connected to discharge port 48 in side valve body 70,70.In Between heart body 44 and valve component 62, it is provided with containment member 80, in ingress port 72, outlet port 76a, 76b and row It is hermetically sealed between channel 78 out.

Spool 64 is formed as cylindrical, and its periphery is provided with the first landing portions (first land portion) 82 and the second landing portions (second land portion) 84 for being slidably contacted with the inner peripheral surface of sleeve 68.Work as valve Core 64 is when (direction arrow A) is slided to the right in valve component 62, the first landing portions 82 be located at the outlet port 76b in left side with Between ingress port 72, and the second landing portions 84 are located between the outlet port 76a on right side and the passing away 78 on right side.This Afterwards, which is considered as that spool 64 or switching valve 18 are located at " first position " (referring to Fig. 6).When spool 64 is in valve component 62 Inside to the left (in the direction of arrowb) slide when, the first landing portions 82 are located at the passing away 78 in left side and the outlet end in left side Between mouth 76b, and the second landing portions 84 are located between ingress port 72 and the outlet port 76a on right side.Hereafter, the state quilt It is considered that spool 64 or switching valve 18 are in " second position ".In this way it is possible to relative to a pair of of outlet port 76a, 76b Switch feed path 52 and passing away 78.

Each push rod 66a, 66b are removably inserted within by being inserted into hole, and insertion hole is worn on (direction arrow A-B) in the axial direction The central part of saturating side valve body 70, and containment member 86 is arranged between push rod 66a, 66b and side valve body 70.Each push rod 66a, For 66b in pumping chamber 36a, the side 36b end portion outstanding can be connected to piston 14a, on 14b.

Spool 64 is provided with small diameter portion 88 at its inner peripheral surface, the small diameter portion 88 it is radially-inwardly prominent and Predetermined length is extended beyond in the axial direction.Therefore, spool 64 is provided with a pair of of step part 90 at its inner peripheral surface.One To push rod 66a, the opposed facing end part of 66b is inserted into spool 64, and each push rod 66a, 66b are being formed in respectively It is engageable with the step part 90 of spool 64 at first flange portion 92 of end part.Respectively, each push rod 66a, 66b are being leaned on It is provided with the second flange portion 94 at the part of the central part of nearly axial direction, and since the second flange portion 94 is resisted against It is limited on side valve body 70 towards push rod 66a, the pumping chamber 36a of 66b, the side 36b is mobile.The setting of return spring 96 is pushed away in a pair Between the opposed facing end part of bar 66a, 66b.

As shown in figure 3, the reset valve 98 including valve body 100 and reset button 102 is attached to centerbody 44.Reset 98 structure of valve It, can be in the third channel 106 for being connected to feed path 52 and the second channel for being connected to fluid channel 32a as normally close valve Connected state or dissengaged positions are switched between 74a.Valve body 100 receives the motive force of spring 104, therefore in general, resets valve 98 Rest on off-position.When worker presses reset button 102, valve body 100 be reset button 102 promotion, to resist spring 104 Motive force it is mobile.Therefore, third channel 106 is connected to second channel 74a, and thus the pressure fluid from compressor directly draws Enter drive chamber 34a.

Booster 10 according to a first embodiment of the present invention constructs basically described above.Next, will description operation and Operating effect.Incidentally, it is assumed that initial position is state as shown in FIG. 6, and switching valve 18 is in first position and piston 14a is moved into the side end plate 22a (in the direction of arrow).

It is located at the outlet port 76a on right side and the discharge on right side in the second landing portions 84 of the initial position, spool 64 Between channel 78, the outlet port 76a on right side is connected to ingress port 72.That is, fluid channel 32a passes through second channel 74a is connected to feed path 52.In addition, the first landing portions 82 of spool 64 are located at the outlet port 76b and arrival end in left side Between mouth 72, the outlet port 76b in left side is connected to the passing away 78 in left side.That is, the fluid channel 32b of the other side Passing away 78 is connected to by second channel 74b.

In the initial position, pressure fluid is supplied to supply port 45, therefore, pressure fluid flow from compressor (not shown) Enter introduction passage 50 and pumping chamber 36a, 36b are introduced by first check-valve 56a, 56b respectively.

The partial pressure fluid supplied from supply port 45 is adjusted flow by regulating valve 16 and is flowed to by feed path 52 Switching valve 18.Then, pressure fluid is supplied to fluid channel 32a by being maintained at the switching valve 18 of first position, and further It is supplied to drive chamber 34a.

Piston 14a is pressed to 20 side of center cell (in the direction of arrowb) by the pressure fluid for introducing drive chamber 34a, because This, the pressure fluid in pumping chamber 36a is pressurized by piston 14a.The pressure fluid being pressurized in this way is conducted through second check-valve 60a, and exported and being directed to output port 47 from extraction channel 58.

On the other hand, the sliding that piston 14b and piston 14a is integrally moved is so that the volume of drive chamber 34b becomes smaller, therefore Pressure fluid in drive chamber 34b is directed into passing away by fluid channel 32b and the switching valve 18 positioned at first position 78, and be discharged from discharge port 48.

Then, when mobile when end position towards 20 side of center cell (in the direction of arrowb), piston 14a against To press push rod 66a on the push rod 66a of switching valve 18.As a result, push rod 66a connects at the first flange portion 92 with spool 64 It closes, and spool 64 is made to be moved to the second position.That is, switching valve 18 is switched to the second position.

At this point, the pressure fluid for being supplied to feed path 52 is supplied to fluid by the switching valve 18 positioned at the second position and leads to Road 32b and drive chamber 34b, therefore, piston 14b are mobile towards 20 side of center cell (in the direction of arrow).Therefore, pumping chamber The pressure fluid that pressure fluid in 36b is pressurized, and is thus pressurized passes through second check-valve 60b and defeated from output port 47 Out.As, piston 14b pressing push rod 66b mobile when end position towards 20 side of center cell (in the direction of arrow).This Switching valve 18 is caused to again switch to first position, thus pressure fluid is fed into drive chamber 34a.With side same as described above Formula, piston 14a and piston 14b integrally repeat to move back and forth, to continuously export the pressure current of pressurization from output port 47 Body.

Here, it may be possible to which since the pressure of the pressure fluid of supply is low and the thrust or driving force of piston 14a, 14b become Deficiency, the pressure difference between pumping chamber 36a, 36b and drive chamber 34a, 34b is smaller or back pressure is applied in discharge port 48.This Outside, the resistance to sliding of piston 14a, 14b or switching valve 18 may become larger.

In this case, spool 64 can keep stopping middle position between the first position and the second position.At this Under kind state, it is assumed that the first landing portions 82 are located at the position Chong Die with the outlet port 76b in left side, therefore in ingress port 72 Occur not between the outlet port 76b in left side and between the outlet port 76b in left side and the passing away 78 in left side Perfect dissengaged positions.It is similarly assumed that the second landing portions 84 are located at the position Chong Die with the outlet port 76a on right side, therefore Between the outlet port 76a on ingress port 72 and right side and in the passing away 78 of the outlet port 76a on right side and right side Between there is faulty dissengaged positions.

When worker presses reset button 102 in the above-described state, the pressure fluid from compressor is introduced directly into drive Dynamic room 34a.As a result, piston 14a is pressed towards 20 side of center cell, to restart booster 10.

According to the booster 10 of the present embodiment, the manually operable setting of reset valve 98 is in connection supply port 45 and driving In the channel of room 34a, therefore, even if when the decline of Fluid pressure of switching valve 18 due to being supplied to it etc. stops at interposition Restarting can also be easy to carry out when setting.

Next, with reference to Fig. 7, by the booster 110 of description according to a second embodiment of the present invention.Booster 110 has multiple Position valve 112, structure are different from the reset valve 98 of first embodiment.Incidentally, with booster 10 according to first embodiment The identical component of component be endowed identical appended drawing reference, and detailed description will be omitted.

It resets valve 112 and is configured to normally close valve, connected state can be switched between feed path 52 and fluid channel 32a Or dissengaged positions, and the Fluid pressure in fluid channel 32a is used as pilot pressure.That is, when in fluid channel 32a When Fluid pressure is higher than predetermined value, the operation of valve 112 is resetted to be switched to communicating position.

In addition, worker presses reset button 102 feed path 52 is connected to fluid channel 32a, to may be used also Pressure fluid is introduced directly into drive chamber 34a from compressor.

According to the booster 110 of the second embodiment, by receiving the Fluid pressure in drive chamber 34a as guiding pressure Power resets the operation of valve 112 to be switched to communicating position.Therefore, even if when switching valve 18 stops at middle position, switching valve 18 Also it is operated when the Fluid pressure in drive chamber 34a is higher than predetermined value, to restart booster 110.

Booster according to the present invention is not limited to previous embodiment.Much less, the case where not departing from purport of the invention Under, the present invention can use various structures.