WO2015083440A1 - 直線運動ロッドのロック装置 - Google Patents
直線運動ロッドのロック装置 Download PDFInfo
- Publication number
- WO2015083440A1 WO2015083440A1 PCT/JP2014/077035 JP2014077035W WO2015083440A1 WO 2015083440 A1 WO2015083440 A1 WO 2015083440A1 JP 2014077035 W JP2014077035 W JP 2014077035W WO 2015083440 A1 WO2015083440 A1 WO 2015083440A1
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- WO
- WIPO (PCT)
- Prior art keywords
- piston
- rod
- screw hole
- pressure
- locking device
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C1/00—Fastening devices with bolts moving rectilinearly
- E05C1/08—Fastening devices with bolts moving rectilinearly with latching action
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/262—Locking mechanisms using friction, e.g. brake pads
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B51/00—Operating or controlling locks or other fastening devices by other non-mechanical means
- E05B51/02—Operating or controlling locks or other fastening devices by other non-mechanical means by pneumatic or hydraulic means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B55/00—Locks in which a sliding latch is used also as a locking bolt
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B61/00—Other locks with provision for latching
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/008—Brakes acting on a linearly moving member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
- F16D2121/16—Mechanical for releasing a normally applied brake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/66—Wedges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
- F16D49/08—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like shaped as an encircling band extending over approximately 360 degrees
- F16D49/10—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like shaped as an encircling band extending over approximately 360 degrees mechanically actuated
Definitions
- the present invention relates to a locking device that is attached to a linear operation device such as a fluid pressure cylinder having a linearly moving rod and locks the rod when the rod is not operating.
- a linear operation device such as a fluid pressure cylinder having a linearly moving rod and locks the rod when the rod is not operating.
- a lock device for locking a rod that linearly moves in a fluid pressure cylinder a lock device body through which the rod passes is fixed to a rod lead-out portion of the fluid pressure cylinder.
- the brake member which clamps the said rod in this locking device main body is generally known conventionally.
- the brake member is a thick cylindrical member having an inner diameter smaller than the outer diameter of the rod, and has a slit-like opening cut in a part of the cylinder in the axial direction, and on both sides of the opening.
- It has a pair of pressure-receiving parts opposite to each other, and the pair of pressure-receiving parts is unlocked by driving the unlocking piston provided in the lock device main body to open and releasing the tightening of the rod by the brake member.
- the rod is tightened and locked by the elastic force of the brake member itself by returning the piston.
- a tapered widened portion is inserted between each pair of pressure receiving portions of the brake member via rollers, and the tapered widened portion is inserted into the unlocking piston.
- the piston is driven by supplying and discharging pressure fluid from the outside to a piston chamber defined in the lock device main body. That is, the tapered expansion portion is disposed so that it can be press-fitted between the pair of rollers that are in contact with the pressure receiving portion of the brake member by driving the piston with the pressure fluid supplied to the piston chamber.
- the pressure receiving portion is expanded by press-fitting the tapered expanding portion to unlock the rod, and the piston is released by the biasing force of the return spring acting on the piston by the discharge of the pressure fluid from the piston chamber. And the peripheral surface of the rod is tightened and locked by the elastic force of the brake member itself.
- the locking device as described above can be unlocked and locked by the manual operation and at the same time be unlocked and locked by the unlocking piston.
- the said locking device has already been supplied to the market as a product provided with the structure which enabled the lock and unlocking by the manual operation volt
- the unlocking piston 43 is accommodated in a piston chamber 42 formed inside the lock device main body 41, and a pressure fluid supply / discharge port 44 communicating with the piston chamber 42 is opened in the lock device main body 41. Yes.
- the piston 43 is integrally provided with a pressing protrusion 45 for pressing the piston 43 in the unlocking direction from the outside.
- the pressing protrusion 45 is a manual operation bolt 60 formed separately from the lock device main body 41. Is screwed into the screw hole 46. Then, by screwing the manual operation bolt 60 into the screw hole 46, the manual operation bolt 60 presses the operation end of the pressing protrusion 45, and the tapered expanded portion 43 b receives a pair of pressures received by the brake member 50.
- the rod 40 is locked by the brake member 50 by manually press-fitting between the parts 51 and pushing the pressure-receiving part 51 open.
- 6 and 7 show a state in which the manual operation bolt 60 is removed from the screw hole 46, and the dust cover 61 is screwed onto the screw hole 46.
- the pressing protrusion 45 for manual operation is integrally provided on the unlocking piston 43, and the pressing protrusion 45 is pressed by the manual operation bolt 60 formed as a dedicated part for unlocking. If this means is adopted, it is necessary to prepare the manual operation bolt 60 and the dustproof cover 61 for closing the screw hole 46 separately, and store them in another place when not in use.
- the inner peripheral surface of the screw hole 46 and the outer peripheral surface of the pressing protrusion 45 are provided.
- the seal ring 47 must be attached to a location in the screw hole 46 different from the portion where the internal thread is cut.
- the sealing by the seal ring 47 must be performed over the entire stroke length of the piston 43, and the screw hole 46 can be manually operated even when the pressing protrusion 45 is at the rising end position.
- the technical problem of the present invention is to simplify and downsize the structure of the lock device by modifying the lock device having a brake member that tightens and locks the rod that linearly moves to a rational design structure. There is to plan.
- a locking device body through which a linearly moving rod passes, a cylindrical brake member that locks the outer periphery of the rod by locking, and unlocks the brake member by opening the brake member.
- the brake member is formed in the axial direction in a tightening hole into which the rod is inserted, and a part of the tightening hole.
- An opening and a pair of pressure receiving portions formed on both sides of the opening, and the piston is accommodated in a piston chamber formed in the lock device main body so as to be displaceable between a lock position and a lock release position.
- a pressure chamber for applying fluid pressure to the pressure receiving surface of the piston body, and a supply / discharge port communicating with the pressure chamber is formed in the lock device body, and the operating element is separate from the piston.
- a concave portion having a diameter larger than the pressing plate portion and deeper than the thickness of the pressing plate portion is formed at a position of the pressure receiving surface of the piston body where the pressing plate portion of the operating element abuts. It is desirable.
- the pair of pressure receiving portions of the brake member and the expansion member of the piston be held between the pair of pressure receiving portions so as to be rotatable in a roller holder and displaceable in a direction of contacting and separating from each other.
- the roller holders are individually provided with their axes directed in a direction perpendicular to the direction in which the expanding member is pushed, and the roller holder has a cylindrical cylindrical portion, and one side and the other of the cylindrical portion facing each other And two roller support holes into which one end of the pair of rollers is separately fitted, and two roller support holes into which the other end of the pair of rollers is fitted separately.
- a restraining member is provided that is locked to the end portion and prevents the roller from coming out of the roller support hole.
- the cylindrical portion has insertion holes that respectively traverse the two roller support holes on the one side and the two roller support holes on the other side, and the suppression member is located in the insertion hole. It has a plate-like portion arranged so as to cross the adjacent roller support hole, and a locking portion formed at the end of the plate-like portion, and the locking portion is formed at the entrance end of the insertion hole It is desirable to be locked to the recessed step.
- the locking device body is connected to a fluid pressure cylinder having the rod, and one end portion of the locking device body along the rod is connected to the fluid pressure cylinder. It is closed by a rod cover which is a part of the cylinder, and the other end of the lock device main body is closed by an end plate through which the rod passes.
- the locking device for a linear motion rod since the operating member for manual operation is always attached to the screw hole of the locking device body, it is not necessary to store the operating member in another place when not in use. Further, when the seal member is attached to the operation element and the piston is displaced by the operation element to release the lock, the seal material does not seal the screw hole, but the operation element is moved to the lock position and the piston is moved. When performing the unlocking operation, the sealing material is configured so that the pressure fluid can be supplied to the pressure chamber by sealing the screw hole. Therefore, the known locking device shown in FIGS. In comparison, it has a rational design structure, and at the same time, the structure is simplified and the size can be reduced.
- FIG. 1 and 2 show a typical embodiment of a locking device for a linear motion rod according to the present invention, cut in a direction perpendicular to the linear motion rod.
- FIG. 1 is a sectional view of a manual unlocking state.
- FIG. 2 is a cross-sectional view in a locked state
- FIG. 3 is a vertical cross-sectional view of an essential part of the embodiment cut in a direction along a linear motion rod.
- the linear motion rod locking device 10 is used to lock the movement of the rod 2 in the direction of the axis L in a linear operation device having a linearly moving rod 2 such as a fluid pressure cylinder 1.
- the device is attached to a rod cover 3 that forms a lead-out portion of the rod 2 at one end of the device.
- the locking device 10 has a casing-shaped locking device body 11 fixed to the rod cover 3 of the fluid pressure cylinder 1.
- the lock device main body 11 has a container portion 11a through which the rod 2 passes, and an upper lid 11b that covers an upper surface of the container portion 11a that is opened.
- a brake member 20 that locks the outer periphery is provided.
- the brake member 20 is a metal thick cylindrical member having a tightening hole 20a having an inner diameter slightly smaller than the outer diameter of the rod 2, and is a slit extending in a direction of the axis L in a part of the tightening hole 20a. And a pair of pressure receiving portions 21 extending toward the upper lid 11b at opposite positions on both sides of the opening 20b.
- a spiral groove 20c surrounding the rod 2 is formed on the inner surface of the tightening hole 20a.
- the spiral groove 20c serves as a clearance for wear powder and grease adhering to the inner peripheral surface of the tightening hole 20a and the outer peripheral surface of the rod 2, and functions as a discharge path for the wear powder and grease. It is.
- the lock device main body 11 has a piston chamber 12 formed between the upper portion of the container portion 11a and the upper lid 11b.
- a piston 13 for unlocking is attached to the rod 2.
- a pressure chamber 12a is formed between the piston 13 and the upper lid 11b, and a supply / discharge port 14 for supplying and discharging pressure fluid communicating with the pressure chamber 12a is provided in the upper lid 11b.
- the pressure receiving unit 21 is pushed open through the roller 33 and the roller receiver 36. Between the upper end surface of the pressure receiving portion 21 of the brake member 20 and the piston 13, when the pressure fluid from the supply / discharge port 14 does not act on the piston 13, the piston 13 returns to the position of FIG. 2.
- a coiled return spring 18 is interposed for the purpose.
- the operating element 15 is a member formed separately from the piston 13 and is screwed into a screw hole 16 formed in the upper cover 11b by screwing a shaft portion 15a formed with a male screw around the upper cover 11b.
- the operation end 15c at the upper end of the shaft portion 15a is exposed to the outside of the lock device main body 11 through the screw hole 16.
- the operation end 15c is formed with an operation hole 15d for inserting and rotating a tool such as a hexagon wrench.
- a disc-shaped pressing plate portion 15b is formed at the lower end portion of the shaft portion 15a of the operating element 15 so as to be positioned in the pressure chamber 12a.
- the pressing plate portion 15b is fitted into a circular recess 13d formed at the center of the upper surface (pressure receiving surface 13c) of the piston 13, and the lower end surface comes into contact with the piston 13 in the recess 13d.
- An annular sealing material 17 is attached to a portion of the upper end surface of the pressing plate portion 15b that contacts the periphery of the screw hole 16 on the inner surface of the upper lid 11b so as to surround the shaft portion 15a.
- the diameter of the concave portion 13d is larger than the diameter of the pressing plate portion 15b, and the depth of the concave portion 13d is larger than the thickness including the sealing material 17 of the pressing plate portion 15b.
- the operating element 15 is attached to the lock device main body 11 by screwing the shaft portion 15a into the screw hole 16 from the inside of the lock device main body 11, and the operation end 15c is moved to the lock device by rotating operation. It is possible to appear outside the main body 11. That is, when the shaft portion 15a is screwed to the unlocking position in FIG. 1, the operation end 15c is immersed in the screw hole 16 or is substantially at the same position as the outer end surface of the lock device main body 11 (upper lid 11b). When the pressing plate portion 15b displaces the piston 3 to the unlocking position and screwes the shaft portion 15a back to the locking position in FIG. While projecting outside from the screw hole 16, the sealing material 17 of the pressing plate portion 15 b comes into contact with a portion surrounding the screw hole 16 on the inner surface of the lock device main body 11 (upper lid 11 b).
- the pressure chamber 12a is configured to be cut off.
- the operation end 15c of the operation element 15 is protruded or not protruded from the screw hole 16 when the rod 2 is locked by screwing back the operation element 15 and when the operation element 15 is unlocked by screwing in the operation element 15. Is to function as an indicator for visually confirming from the outside. Compared with the known ones shown in FIGS. 6 and 7, this configuration eliminates the need for separate storage when the manual operation bolt 60 or the dust cover 61, which can also be used as an indicator, is not used, and the mounting effort during use. This is advantageous in that the rod 2 can be locked and released only by rotating the operation element 15 and at the same time the state can be displayed by an indicator.
- the sealing material 17 of the operating element 15 is inserted into the screw hole 16 on the inner surface of the locking device main body 11 in the pressure chamber 12a. Since the screw hole 16 is stably sealed by being in contact with the periphery and shut off from the pressure chamber 12a, the lock is released by supplying pressure fluid from the supply / discharge port 14 of the lock device body 11 to the pressure chamber 12a. The piston 2 can be driven to unlock the rod 2. Of course, if the pressure fluid in the pressure chamber 12a is discharged from the supply / discharge port 14, the piston 13 is restored by the urging force of the return spring 18 and the rod 2 is locked again.
- the unlocking piston 13 can be moved up and down by the pressure fluid supplied to and discharged from the pressure chamber 12a through the supply / discharge port 14 and the manually operated operation element 15.
- the configuration is as follows. That is, the unlocking piston 13 gradually increases in thickness toward the distal end side for pushing open the circular piston main body 13a accommodated in the piston chamber 12 and the pair of pressure receiving portions 21 of the brake member 20. It has the said expansion member 13b formed in the taper shape which becomes thin.
- a circular connecting portion 13e is formed at the base end portion of the expanding member 13b, and the convex portion of the connecting portion 13e is formed into a circular concave portion 13f formed in the piston main body 13a.
- the piston main body 13a and the expansion member 13b are integrally coupled by being fitted inside and screwing a connecting screw 13g into a screw hole formed in the piston main body 13a and the connecting portion 13e.
- the connection between the piston main body 13a and the expanding member 13b is not limited to the illustrated structure, and can be performed using appropriate means.
- the expansion member 13b that receives a large local force to push open a pair of pressure receiving portions 21 in the brake member 20 via a roller 33 described later, and the pressure chamber 12a entirely.
- the piston main body 13a which is hardly affected by the fluid pressure and has a large local force, is individually molded with, for example, a wear-resistant material suitable for the former or a synthetic resin material suitable for the latter. Therefore, the unlocking piston 13 can be made inexpensive and highly durable.
- the operating element 15 has the sealing material 17 that comes into contact with the periphery of the screw hole 16 on the inner surface of the lock device main body 11, and the sealing material 17 is locked when the operating element 15 is locked by screwing back.
- the seal of the screw hole 16 is stabilized and the lock device main body 11 is compared with the known one shown in FIGS. 6 and 7. It is very effective for reducing the thickness.
- the screw hole 46 into which the manual operation bolt 60 is screwed and the pressing protrusion of the piston 43 fitted in the screw hole 46 Since the seal 45 is sealed with the child 45 by the seal ring 47 at the position of the guide hole portion 46a connected to the screw hole 46, the length of the screw hole 46 is set to the stroke of the piston 43. It is necessary to form a length with an allowance for a screw groove so that screwing can be started.
- the locking device 10 of the present invention since the sealing member 17 that contacts the periphery of the screw hole 16 is provided on the operation element 15, the screw hole 16 can be made sufficiently short, and as a result.
- the upper lid 11b of the lock device main body 11 can be made thinner, so that the lock device 10 main body can be made thinner and lighter.
- the lock device 10 when the lock device main body 11 that accommodates the brake member 20 is integrally connected to the fluid pressure cylinder 1 including the rod 2, one end face of the lock device main body 11 is provided.
- the spacer 63 (see FIG. 7) interposed between the lock device body 41 and the fluid pressure cylinder 1 in the conventional device is omitted, and the product Small and lightweight.
- the other end face of the lock device main body 11 is closed by the end plate 4 by fixing the end plate 4 through which the rod 2 passes, so that the size of the rod 2 is the same.
- the expanding member is provided between the pair of pressure receiving portions 21 of the brake member 20 and the expanding member 13b of the unlocking piston 13 that pushes the pair of pressure receiving portions 21 in order to reduce frictional force.
- a pair of rollers 33 rotatable around an axis perpendicular to the advancing and retreating direction of 13 b and a plate-like roller receiver 36 against which the rollers 33 come into contact are provided.
- the member 13b enters from the tip side.
- the roller receiver 36 is for preventing a large load from the roller 33 from being directly applied to the pressure receiving portion 21 and is a hardened high-strength member.
- the roller 33 is fixed by a plurality of set screws 37 screwed from the outer surface side of the portion 21, and the roller 33 is configured to indirectly press the pressure receiving portion 21 through the roller receiver 36.
- the set screw 37 is arranged at two places, the lower left and the upper right of the roller receiver 36, and the lower left one set screw 37 appears in the drawings.
- the roller 33 is held by a roller holder 30.
- the roller holder 30 includes a cylindrical tube portion 31 and a flange portion 32 at the upper end of the tube portion 31.
- the pressure receiving portion 21 and the expanding member 13b are disposed so as to surround the pressure receiving portion 21 and the expanding member 13b.
- roller support wall 31 a that supports one end of the roller 33 and the other roller support wall 31 a that supports the other end of the roller 33 are provided at positions opposite to the inner lower end of the cylindrical portion 31.
- two horizontally long roller support holes 31b are formed side by side at a slight interval.
- One end of the pair of rollers 33 arranged in parallel with each other is individually fitted into the two roller support holes 31b formed in the one roller support wall 31a, and the other roller support wall 31a.
- the other ends of the pair of rollers 33 are individually fitted inside the two roller support holes 31b formed in the two, and the pair of rollers 33 is within the length of the roller support holes 31b.
- the roller support hole 31b passes through the roller support wall 31a and the cylindrical portion 31 from the inside to the outside of the cylindrical portion 31, and the roller 33 moves in the axial direction of the roller 33 so that the roller support hole
- a slit-like insertion hole 31c is formed in each of the roller support walls 31a in the vertical direction (vertical direction in the figure) across the two adjacent roller support holes 31b.
- a restraining member 34 having a lateral length straddling the two roller support holes 31b is inserted into the insertion hole 31c so as to close the roller support holes 31b.
- the restraining member 34 is an L-shaped member, and includes a plate-like portion 34a that fits into the insertion hole 31c, and a locking portion 34b that extends perpendicularly to the upper end of the plate-like portion 34a.
- the stopper 34b is engaged with a concave step 31d formed at the upper end (entrance end) of the insertion hole 31c.
- the suppression member 34 can be formed, for example, by bending a metal plate into an L shape. However, the suppression member 34 is not limited to such a configuration, and any member that can prevent the pair of rollers 33 from coming out of the roller support holes 31b can be used.
- the roller holder 30 configured as described above is not only simple in structure but also very easy to assemble as compared with that shown in FIGS.
- the pair of rollers 33 can smoothly roll between the pair of pressure receiving portions 21 of the brake member 20 and the tapered expanding member 13b of the unlocking piston 13.
- the return spring 35 is interposed between the flange portion 32 and the step portion 38 formed in the container portion 11a of the lock device main body 11 so that the piston 13 is slightly movable in the moving direction.
- the return spring 35 is always urged toward the piston 13 side. 2 when the piston 13 is raised and locked, the roller holder 30 is lifted together with the roller 33 by the return spring 35, and when the piston 13 is lowered and unlocked as shown in FIG. The roller holder 30 is lowered together with the roller 33.
- the upper end surface of the roller support wall 31 a is substantially at the same height as the upper end surface of the pressure receiving portion 21 of the brake member 20. For this reason, the lower end of the return spring 18 comes into contact with the locking portion 34b of the restraining member 34, and the restraining member 34 is prevented from coming out of the insertion hole 31c.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Actuator (AREA)
- Braking Arrangements (AREA)
Abstract
Description
また、上記操作子をロック位置からロック解除位置までねじ込むと、該操作子に押されて上記ピストンがロック解除位置まで移動し、上記拡開部材が一対の受圧部を押し開くため、上記ロッドのロックを手動で解除することができる。
この場合に、上記筒部は、上記一側の2つのローラ支持孔及び上記他側の2つのローラ支持孔をそれぞれ横切る挿入孔を有し、また、上記抑止部材は、上記挿入孔内に上記隣接するローラ支持孔を横切るように配置された板状部と、該板状部の端部に形成された係止部とを有し、該係止部が、上記挿入孔の入口端に形成された凹段部に係止していることが望ましい。
また、上記操作子にシール材を取り付け、該操作子によりピストンを変位させてロックを解除するときには、上記シール材が上記ネジ孔をシールしないが、上記操作子をロック位置に移動させてピストンによるロック解除操作を行うときには、上記シール材が上記ネジ孔をシールすることによって圧力室に対する圧力流体の供給を可能になるように構成されているため、図6,7に示した公知のロック装置に比べ、合理的な設計構造を有すると同時に、構造が簡略化されており、小型化も可能である。
この直線運動ロッドのロック装置10は、図3に示すように、流体圧シリンダ1のような直線運動するロッド2を備えた直線作動機器に、上記ロッド2の軸線L方向の移動をロックするための装置として、上記機器の一端の上記ロッド2の導出部を形成するロッドカバー3に取り付けられるものである。
上記操作子15をねじ戻し操作して、上記押圧部材15dによるピストン13の押し下げを解除すれば、図2に示すように、該ブレーキ部材20自体の弾性力によるロッド2の締め付けで、ブレーキ部材20がロック位置に戻される。
即ち、上記ロック解除用ピストン13は、上記ピストン室12内に収容された円形のピストン本体13aと、上記ブレーキ部材20の一対の受圧部21を押し開くための、先端側に向けて厚みが次第に薄くなるようなテーパー状に形成された上記拡開部材13bとを有している。該拡開部材13bの基端部には、図5から分かるように、円形をした連結部13eが形成され、該連結部13eの凸部が、上記ピストン本体13aに形成された円形の凹部13f内に嵌合し、該ピストン本体13aと上記連結部13eとに形成されたネジ孔内に連結ネジ13gをねじ込むことにより、上記ピストン本体13aと上記拡開部材13bとが一体に結合されている。なお、上記ピストン本体13aと拡開部材13bとの連結は、図示の構造に限らず、適宜手段を用いて行うことができる。
これに対し、本発明のロック装置10においては、上記操作子15にネジ孔16の周辺に当接するシール材17を設けているので、該ネジ孔16を十分に短くすることができ、結果的に、ロック装置本体11の上蓋11bを薄くし、ひいてはロック装置10本体をそれだけ薄型化、軽量化することができる。
上記抑止部材34は、例えば金属板をL字形に折曲することにより形成することができる。
しかし、上記抑止部材34は、このような構成のものに限らず、一対のローラ33の上記ローラ支持孔31bからの抜け出しを防止できるものであればよい。
このように構成したローラホルダ30は、特許文献1の図5~図9に示されているものに比して構成が簡単であるだけでなく、組立が非常に容易なものである。
従って、上記復帰ばね18は、上記ピストン13を復帰させる機能と、上記抑止部材34の抜け出しを防止する機能とを、兼備するものであるということができる。
2 ロッド
3 ロッドカバー
4 端板
10 ロック装置
11 ロック装置本体
12 ピストン室
12a 圧力室
13 ピストン
13a ピストン本体
13b 拡開部材
13c 受圧面
13f 凹部
14 給排ポート
15 操作子
15a 軸部
15b 押圧板部
15c 操作端
16 ネジ孔
17 シール材
20 ブレーキ部材
20a 締付孔
20b 開口部
21 受圧部
30 ローラホルダ
31 筒部
31b ローラ支持孔
31c 挿入孔
31d 凹段部
33 ローラ
34 抑止部材
34a 板状部
34b 係止部
L 軸線
Claims (5)
- 直線運動するロッドが貫通するロック装置本体が、上記ロッドの外周を締め付けてロックする円筒状のブレーキ部材と、該ブレーキ部材を押し開いてロックを解除するロック解除用ピストンと、該ピストンを手動操作する操作子とを有し、
上記ブレーキ部材は、上記ロッドが挿通された締付孔と、該締付孔の一部に軸線方向に形成された開口部と、該開口部の両側に形成された一対の受圧部とを有し、
上記ピストンは、上記ロック装置本体に形成されたピストン室内にロック位置とロック解除位置とに変位自在に収容されたピストン本体と、該ピストン本体が上記ロック解除位置に変位したとき上記一対の受圧部間に進入して該受圧部を押し開くテーパー状の拡開部材とを有し、
上記ピストン室内には、上記ピストン本体の受圧面に流体圧を作用させる圧力室が形成され、上記ロック装置本体には、該圧力室に連通する給排ポートが形成され、
上記操作子は、上記ピストンと別体に形成されていて、上記ロック装置本体のネジ孔にねじ込まれた軸部と、該軸部の一端に形成されて上記圧力室内に位置する押圧板部と、上記軸部の他端に形成された操作端と、上記押圧板部に上記軸部を取り囲むように設けられシール材とを有し、上記軸部がロック解除位置までねじ込まれると、上記操作端が上記ネジ孔に対して非突出の位置を占めると共に、上記押圧板部が上記ピストン本体を上記ロック解除位置に変位させ、上記軸部がロック位置までねじ戻されると、上記操作端が上記ネジ孔から外部に突出した位置を占めると共に、上記押圧板部のシール材が、上記ロック装置本体の上記ネジ孔を取り囲む部位に当接して該ネジ孔を上記圧力室から遮断する、
ことを特徴とする直線運動ロッドのロック装置。
- 上記ピストン本体の受圧面の、上記操作子の押圧板部が当接する位置に、該押圧板部より大径で該押圧板部の厚みより深さの深い凹部が形成されていることを特徴とする請求項1に記載の直線運動ロッドのロック装置。
- 上記ブレーキ部材の一対の受圧部と上記ピストンの拡開部材との間に、ローラホルダに回転自在且つ相互に接離する方向に変位自在なるように保持された一対のローラが、軸線を上記拡開部材の押入方向と直交する方向に向けて個別に介設され、
上記ローラホルダは、円筒形の筒部を有し、該筒部の相対する一側と他側とに、上記一対のローラの一端が別々に嵌合する2つのローラ支持孔と、上記一対のローラの他端が別々に嵌合する2つのローラ支持孔とが設けられると共に、上記ローラの端部に係止して該ローラが上記ローラ支持孔から抜け出すのを抑止する抑止部材が設けられている、
ことを特徴とする請求項1又は2に記載の直線運動ロッドのロック装置。
- 上記筒部は、上記一側の2つのローラ支持孔及び上記他側の2つのローラ支持孔をそれぞれ横切る挿入孔を有し、
上記抑止部材は、上記挿入孔内に上記2つのローラ支持孔を横切るように配置された板状部と、該板状部の端部に形成された係止部とを有し、該係止部が、上記挿入孔の入口端に形成された凹段部に係止している、
ことを特徴とする請求項3に記載の直線運動ロッドのロック装置。
- 上記ロック装置本体は、上記ロッドを有する流体圧シリンダに連結されていて、該ロック装置本体の上記ロッドに沿った一方の端部は、上記流体圧シリンダの一部であるロッドカバーにより閉鎖され、該ロック装置本体の他方の端部は、上記ロッドが貫通する端板で閉鎖されている、
ことを特徴とする請求項1から4の何れかに記載の直線運動ロッドのロック装置。
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US15/102,199 US9885201B2 (en) | 2013-12-06 | 2014-10-09 | Lock device for linear motion rod |
CN201480066489.0A CN105814323B (zh) | 2013-12-06 | 2014-10-09 | 直线运动杆的锁止装置 |
DE112014005547.6T DE112014005547T5 (de) | 2013-12-06 | 2014-10-09 | Verriegelungsvorrichtung für eine linear bewegbare Stange |
KR1020167014040A KR102164909B1 (ko) | 2013-12-06 | 2014-10-09 | 직선 운동 로드의 록 장치 |
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JP6252947B2 (ja) * | 2014-05-15 | 2017-12-27 | Smc株式会社 | ガイド機構及びその製造方法 |
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DE102017126870A1 (de) * | 2017-11-15 | 2019-05-16 | Schaeffler Technologies AG & Co. KG | Nehmerzylinder mit höhenverstellbarem Kolben und Kupplung mit Nehmerzylinder |
US11668357B2 (en) | 2017-11-30 | 2023-06-06 | Airbus Canada Managing Gp Inc. | Brake for transmission line of aircraft control surfaces |
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DE202018005634U1 (de) * | 2018-12-09 | 2020-03-11 | Herbert Höfler | Feststelleinrichtung |
CN111113192A (zh) * | 2020-01-21 | 2020-05-08 | 广东金玻智能装备有限公司 | 一种进给装置和采用该进给装置的玻璃磨边机 |
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JP2022025630A (ja) | 2020-07-29 | 2022-02-10 | Smc株式会社 | ロッド用ロック装置 |
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US20160312502A1 (en) | 2016-10-27 |
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