WO2014126087A1 - 3位置動作型アクチュエータ及び永久磁石式の渦電流式減速装置 - Google Patents
3位置動作型アクチュエータ及び永久磁石式の渦電流式減速装置 Download PDFInfo
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- WO2014126087A1 WO2014126087A1 PCT/JP2014/053152 JP2014053152W WO2014126087A1 WO 2014126087 A1 WO2014126087 A1 WO 2014126087A1 JP 2014053152 W JP2014053152 W JP 2014053152W WO 2014126087 A1 WO2014126087 A1 WO 2014126087A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/043—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with a radial airgap
-
- 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
-
- 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
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/58—Combined or convertible systems
- B60T13/585—Combined or convertible systems comprising friction brakes and retarders
- B60T13/586—Combined or convertible systems comprising friction brakes and retarders the retarders being of the electric type
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/748—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on electro-magnetic brakes
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
- F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
- F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops
-
- 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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
-
- 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
-
- 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
- F16D63/002—Brakes with direct electrical or electro-magnetic actuation
-
- 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
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
-
- 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
- F15B2015/206—Combined actuation, e.g. electric and fluid actuated
-
- 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
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- 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
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
Definitions
- the present invention relates to a three-position operation type actuator capable of stopping control at three positions, and a permanent magnet type eddy current type speed reducer equipped with this actuator.
- an engine brake and an exhaust brake are employed as auxiliary brakes.
- the capacity of engine brakes and exhaust brakes has been reduced along with the reduction in engine displacement mounted on vehicles, and therefore, an eddy current type speed reducer has been introduced and auxiliary brakes are often strengthened.
- the permanent magnet type eddy current type speed reducer has a single row turning method and a two row turning method.
- the single row turning method has a configuration shown in FIG. 6, for example.
- reference numeral 2 denotes a support made of a nonmagnetic material such as aluminum, which is fixedly supported on the bearing case 1, and supports the magnet support ring 4 via a bearing 3 so as to be rotatable.
- a plurality of pole pieces 7 made of a ferromagnetic material are arranged at equal intervals on the same circumference via nonmagnetic support members 8 so as to face the outer surface of each group of permanent magnets 6.
- the rotor 9 is fitted to the rotating shaft 5 so that the cylindrical portion 9a faces the pole piece 7 with a predetermined gap, and an actuator for rotating the magnet support ring 4 is provided on the support 2. It is installed at a position on the circumference.
- the two-row turning method has a configuration shown in FIG. 7, for example.
- the following description demonstrates only a different point from a single row turning system, and abbreviate
- fixed support ring On the outer peripheral surfaces of the fixed-side magnet support ring (hereinafter referred to as fixed support ring) 4a and the rotation-side magnet support ring (hereinafter referred to as rotation support ring) 4b, a plurality of permanent magnets as described above. 6a and 6b are installed in parallel at equal intervals.
- a plurality of pole pieces 7 are arranged on the support member 8 in the same manner as described above so as to face the outer surfaces of the groups of permanent magnets 6a and 6b installed on the fixed support ring 4a and the rotation support ring 4b. It arrange
- FIG. 6B and 7B show the relative positions of the permanent magnets 6, 6a, 6b and the pole piece 7 in the braking state
- FIG. 6C shows the permanent magnets 6, 6a, 6b in the non-braking state. It is a figure which shows the relative position of the pole piece 7.
- the rotation of the magnet support ring 4 and the rotation support ring 4b is performed by an actuator such as an air cylinder through the yoke link 10 protruding from the side surface of the magnet support ring 4 or the rotation support ring 4b. .
- This actuator uses a three-position operation type actuator that can switch the braking force in two stages by controlling the position of the permanent magnet to three positions.
- a three-position operation type actuator will be described.
- a stepped piston having a cylinder that opens toward a small diameter end face is inserted into the large diameter hole of a stepped cylinder having a large diameter hole and a small diameter hole formed therein. Then, a rod that protrudes to the outside through the large-diameter side end wall of the stepped piston and the large-diameter hole side end wall of the stepped cylinder is coupled to the piston fitted into the cylinder, A spring is arranged between the end wall of the attached piston and the piston.
- Patent Document 3 the applicant proposed a three-position operation type actuator using two cylinders in Patent Document 3.
- the actuator proposed in Patent Document 3 can perform three-position control without using complicated shaped parts and without increasing the diameter of the actuator more than necessary, unlike the actuator proposed in Patent Document 2. it can.
- the problem to be solved by the present invention is that, in the case of a three-position operation type actuator using a spring, the piston diameter becomes large and the apparatus becomes large, which hinders mounting on a vehicle.
- the piston diameter becomes large and the apparatus becomes large, which hinders mounting on a vehicle.
- the three-position operation type actuator of the present invention employs the following configuration in order to realize a three-position operation with one cylinder without using a spring.
- the three-position motion actuator of the present invention is A cylinder closed at both ends with holding lids; A partition plate and an intermediate stopper plate fixed inside the cylinder at an appropriate interval in the axial direction; A first piston inserted between the one holding lid inside the cylinder and the intermediate stopper plate so as to be movable in the axial direction of the cylinder; A second piston inserted between the intermediate stopper plate and the partition plate inside the cylinder so as to be movable in the axial direction of the cylinder; A third piston inserted between the partition plate inside the cylinder and the other pressing lid so as to be movable in the axial direction of the cylinder; The third piston is attached to the base end, and the tip protrudes outside the cylinder through the partition plate, the second piston, the intermediate stopper plate, the first piston, and the one holding lid.
- the main feature is that it has
- the fluid is supplied to or discharged from the actuator, and the tip of the rod is moved to the braking OFF position, the partial braking position (braking force weak), the braking ON position (controlling). Power).
- the present invention since a three-position operation can be realized with one cylinder without using a spring, a large-diameter cylinder is not required, and the size of the apparatus is increased due to the use of two cylinders. This makes it possible to prevent the device from becoming lighter and more compact, thereby improving the mountability on the vehicle. Further, when the solenoid valve is directly connected to the actuator, piping is not necessary, and the apparatus can be further reduced in size and weight.
- the present invention is fixed to the first and second pistons and the rod which are movable along the rod inside the cylinder for the purpose of realizing a three-position operation with one cylinder without using a spring.
- Three-position operation was realized by moving the third piston inside the cylinder.
- FIG. 1 is a longitudinal sectional view showing a three-position operation type actuator according to the present invention.
- the tip of the rod 12 is moved. It is configured to be positioned at three positions of braking OFF, partial braking, and braking ON.
- the cylinder 11 has a configuration in which the other end of the first cylinder 11a and one end of the second cylinder 11b are connected in series. Then, one end of the first cylinder 11a is closed with one pressing lid 16, and the other end of the second cylinder 11b is closed with the other pressing lid 17, thereby forming a sealed space 11c inside.
- Reference numerals 16a and 17a denote, for example, ring-shaped cushion pads installed on the side of the closed space 11c of the pressing lids 16 and 17.
- Reference numeral 18 denotes an intermediate stopper plate fixed by being sandwiched between the cylinders 11a and 11b in the sealed space 11c of the connecting portion between the first cylinder 11a and the second cylinder 11b.
- An opening 18a having a size to accommodate is provided.
- ring-shaped cushion pads 18b are also provided on the outer and front surfaces of the opening 18a.
- Reference numeral 19 denotes a partition plate fixed to an axially intermediate portion of the second cylinder 11b of the sealed space 11c, and a through hole 19a of the rod 12 is provided in the central portion.
- the partition plate 19 is fixed to the second cylinder 11 b by providing a retaining ring 20 inside the second cylinder 11 b at the front and back surface positions of the partition plate 19.
- the first piston 13 is inserted between the one pressing lid 16 and the intermediate stopper plate 18 inside the cylinder 11 so as to be movable in the axial direction of the cylinder 11.
- the first piston 13 is provided with a through-hole 13a of the rod 12 in the center so that the first piston 13 can move with respect to the rod 12.
- the second piston 14 is inserted between the intermediate stopper plate 18 and the partition plate 19 inside the cylinder 11 so as to be movable in the axial direction of the cylinder 11.
- the second piston 14 is provided with a through-hole 14a of the rod 12 at the center so that the second piston 14 can move with respect to the rod 12.
- the third piston 15 is inserted between the partition plate 19 inside the cylinder 11 and the other pressing lid 17 so as to be movable in the axial direction of the cylinder 11, and the base of the rod 12 is inserted. It is fixed to the end with a set screw 21.
- Reference numeral 22 denotes a stopper fixed to an intermediate portion of the rod 12 in order to move the first or second piston 13 or 14 when the rod 12 moves, and an intermediate stopper plate provided with cushion pads 18b on the front and back surfaces. 18 has substantially the same thickness.
- the rod 12 has a configuration in which a first rod 12a and a second rod 12b are connected in series, and the stopper 22 is sandwiched between the first rod 12a and the second rod 12b. It is fixed.
- the three-position operation type actuator of the present invention having the above-described configuration supplies, for example, compressed air to the passage shown in FIG. 1 or exhausts it through the passage, thereby enabling braking OFF, partial braking (braking force weak), braking ON (braking).
- the tip of the rod 12 is moved to the 3rd position of (strong power).
- the 23 is a first passage for supplying or discharging compressed air between the other pressing lid 17 and the third piston 15 and is formed by penetrating the other pressing lid 17.
- 24 passes through the other holding lid 17 and passes through the outer peripheral wall of the second cylinder 11b, so that compressed air is supplied or discharged between the third piston 15 and the partition plate 19. It is the formed 2nd channel
- 25 branches from the first passage 23 and passes through the outer peripheral wall of the second cylinder 11b, so that compressed air is supplied or discharged between the partition plate 19 and the second piston 14. It is the 3rd channel
- 26 branches from the second passage 24 and passes through the outer peripheral walls of the second cylinder 11 b and the first cylinder 11 a, and is compressed between the one pressing lid 16 and the first piston 13. It is the 4th channel formed so that air may be supplied or exhausted.
- a nozzle 27 opens the air in the space formed by the intermediate stopper plate 18 and the second piston 14 to the atmosphere, and is installed in a through hole 11ba that penetrates the outer peripheral wall of the second cylinder 11b. ing.
- the tip of the rod is moved to three positions of braking OFF, partial braking (braking force weak), and braking ON (braking force strong). The case of moving to will be described.
- the third piston 15 is pressed against the other holding lid 17 and the rod 12 from the cylinder 11 is pressed.
- the amount of protrusion is the smallest.
- the movement of the rod 12 causes the second piston 14 to be pushed by the stopper 22 to discharge air from the third passage 25 and move to the position closest to the partition plate 19.
- the first piston 13 is pressed against the intermediate stopper plate 18 by supplying compressed air through the fourth passage 26 and discharging air from the nozzle 27.
- the stopper 22 is also moved by the movement of the second piston 14.
- the stopper 22 is sandwiched between the first piston 13 and the second piston 14. In this state, the stopper 22 stops at the opening 18a portion of the intermediate stopper plate 18, and the protruding amount of the rod 12 is intermediate between braking OFF and braking ON to reach the partial braking position.
- the third piston 15 is moved in the direction of the partition plate 19 and the first piston 13 is pushed by the stopper 22 and moved in the direction of the one holding lid 16. Then, when the first piston 13 comes into contact with one holding lid 16, the movement of the rod 12 is stopped, and the protruding amount of the rod 12 is maximized.
- the space defined by the one pressing lid 16 and the partition plate 19 is a working chamber for controlling the partial braking position. Further, a space defined by the partition plate 19 and the other pressing lid 17 is a control working chamber at both ends of braking OFF and braking ON.
- the three-position operation type actuator of the present invention adopts the above-described configuration, so that a three-position operation can be realized with one cylinder without using a spring. Therefore, it is not necessary to increase the diameter of the cylinder, and it is possible to prevent an increase in the size of the apparatus due to the use of two cylinders, making the apparatus lightweight and compact, and improving the mountability to the vehicle.
- the three-position operation type actuator of the present invention has electromagnetic valves 28 and 29 in the first and third passages 23 and 25 and the second and fourth passages 24 and 26, respectively.
- piping between the solenoid valves 28 and 29 and the actuator can be made unnecessary. Therefore, the apparatus can be further reduced in size and weight.
- the solenoid valve 28 connected to the first and third passages 23 and 25 is a single-acting normally closed solenoid valve having two ports.
- the solenoid valve 29 connected to the second and fourth passages 24, 26 is a single-acting normally open solenoid valve having two ports (see FIG. 3B).
- the permanent magnet type eddy current speed reducer of the present invention is an actuator for a braking ON-OFF switching device in the eddy current speed reducer of the single-row swing type or the double-row swing type described with reference to FIGS.
- the three-position operation type actuator of the present invention having the above-described configuration is used.
- the rod 12 of the three-position operation type actuator of the present invention and the rotating portion of the magnet support ring 4 are not directly connected, but may be connected via a lever mechanism.
- FIG. 4 is a view showing an example in which the three-position operation type actuator of the present invention and the rotating portion of the magnet support ring 4 are directly connected.
- FIG. 4 shows an example in which a stand 31 with a cam follower 30 protruding is attached to the magnet support ring 4 and a connecting fitting 32 having a U groove 32a fitted to the cam follower 30 is installed and connected to the tip end of the rod 12. It is.
- FIG. 5 is a view showing an example in which the three-position operation type actuator of the present invention and the rotating portion of the magnet support ring 4 are connected via a lever mechanism.
- the pins 33 protrude from the stand 31, while the pins 34 and 35 are installed at the tip of the rod 12 and the housing of the eddy current reduction device, and these pins 33 to 35 can be rotated by the lever 36.
- This is an example of installation and connection.
- the distance L2 from the pin 35 to the pin 34 installed at the tip of the rod 12 is larger than the distance L1 from the pin 35 installed in the housing to the pin 33 projected from the stand 31.
- the same turning power can be obtained with a cylinder having a smaller diameter than in the case of the direct connection shown in FIG.
- the positions of the control chamber at the partial braking position and the control chamber at both ends in the above example may be interchanged.
- the actuator of the present invention can be applied not only to an eddy current type reduction device but also as a drive device for controlling the position of an exhaust valve of an exhaust brake as long as it requires a three-position operation.
- the permanent magnet type eddy current type speed reducer of the present invention is not limited to the single row swivel type and the double row swivel type, and can be applied to, for example, a disk type disclosed in Japanese Patent Laid-Open No. 1-234044. .
- the actuator of the present invention is operated by compressed air.
- a gas other than compressed air or a liquid such as oil is used.
- the actuator of the present invention may be operated.
- one presser lid 16 and the other presser lid 17 do not need to be separate from the cylinder 11 as in the above example, and the cylinder 11 is formed by forming the end of the cylinder 12 into a wall shape (end wall). It may be one.
- the case where the protruding amount of the rod 12 is the smallest is the braking OFF position of the permanent magnet type eddy current reduction device, and the case where the protruding output of the rod 12 is the largest is the braking ON position.
- the rod 12 may be connected such that the protrusion amount is the largest, and the position where the rod 12 protrusion amount is the smallest is the brake ON position.
- the partial braking position does not have to be an intermediate position of the stroke of the rod 12 (the amount of movement from the braking OFF position to the braking ON position), and is a braking OFF position at which a necessary braking force (weak) can be exerted. It is an arbitrary position between the braking ON position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
図6において、2は軸受けケース1に固定支持されたアルミニウム等の非磁性体からなる支持体であり、軸受3を介して磁石支持リング4を回動自在に支持している。この磁石支持リング4の外周面には、上下の磁極面が回転軸5の軸心に対して直角方向の断面において同一半径の円弧面をなす複数個の永久磁石6を、同一円周上に等間隔で固定している。加えて、前記各永久磁石6群の外表面に対面するように、強磁性体からなる複数枚のポールピース7を非磁性体の支持部材8を介して同一円周上に等間隔で配置して支持体2に一体に固定している。そして、ロータ9を回転軸5にはめて、その円筒部9aを所定の隙間を有するようにしてポールピース7に対面させると共に、支持体2には磁石支持リング4を回動させるためのアクチュエータを円周上の位置に設置している。
すなわち、二列旋回方式は、前記支持体2に2つの磁石支持リング4a,4bを並列に配置し、一方の磁石支持リング4aを前記支持体2に固定支持する一方、他方の磁石支持リング4bは軸受3を介して回転が自在なように支持している。前記固定側の磁石支持リング(以下、固定支持リングという)4a及び前記回動側の磁石支持リング(以下、回動支持リングという)4bの外周面に、前記と同様に、複数個の永久磁石6a,6bを等間隔に並列に設置している。加えて、これら固定支持リング4a及び回動支持リング4bに設置した各永久磁石6a,6b群の外表面に対面するように、前記と同様に、複数のポールピース7を前記支持部材8に等間隔で同一円周上に配置して支持体2に一体に設置している。
両端を押さえ蓋で閉じたシリンダと、
このシリンダの内部に、軸方向に適宜の間隔を有して固定された仕切り板及び中間止め板と、
前記シリンダの内部の前記一方の押さえ蓋と前記中間止め板の間を、シリンダの軸方向の移動自在に挿入した第1のピストンと、
前記シリンダの内部の前記中間止め板と前記仕切り板の間を、シリンダの軸方向の移動自在に挿入した第2のピストンと、
前記シリンダの内部の前記仕切り板と前記他方の押さえ蓋の間をシリンダの軸方向の移動自在に挿入した第3のピストンと、
基端に前記第3のピストンを取り付け、先端が前記仕切り板、前記第2のピストン、前記中間止め板、前記第1のピストン、及び前記一方の押さえ蓋を貫通して前記シリンダの外部に突出した、シリンダの軸方向に移動自在なロッドと、
前記ロッドの中間部に固定され、ロッドの前記移動時に前記第1又は第2のピストンを移動させるストッパと、
を備えたことを最も主要な特徴としている。
第3のピストンと仕切り板の間、及び一方の押さえ蓋と第1のピストンの間に流体を供給する一方、仕切り板と第2のピストンの間、及び第3のピストンと他方の押さえ蓋の間への流体の供給通路は大気に開放する。このうち、第3のピストンと仕切り板の間への流体の供給によって、第3のピストンは他方の押さえ蓋に押し付けられてシリンダからのロッドの突出量が一番小さくなる。前記ロッドの移動により、第2のピストンはストッパに押されて最も仕切り板に接近した位置に移動する。一方、一方の押さえ蓋と第1のピストンの間への流体の供給によって、第1のピストンは、中間止め板に押し付けられる。
前記制動OFFの状態から、さらに他方の押さえ蓋と第3のピストンの間、及び仕切り板と第2のピストンの間にも流体を供給して、第2のピストンが中間止め板に当接するまで移動させる。ストッパは、第1のピストンと第2のピストンに挟まれているため、前記第1のピストンと第2のピストンが中間止め板に当接すると、中間止め板の開孔部で静止して、ロッドは部分制動位置になる。第3のピストンは、ロッドに固定されているため、第1のピストンと第2のピストンが中間止め板に当接して停止すると、他方の押え蓋と仕切り板との間の軸方向の中間位置で停止する。
前記部分制動位置から、第3のピストンと仕切り板の間、及び一方の押さえ蓋と第1のピストンの間への流体の供給を停止し、大気に開放する。この操作によって、第3のピストンは仕切り板方向に移動し、この移動に伴って第1のピストンはストッパに押されて一方の押さえ蓋方向に移動する。そして、第1のピストンが一方の押さえ蓋に当接して停止した状態で、ロッドの突出量が最大になる。
第2の通路24を通じて第3のピストン15と仕切り板19の間に、及び第4の通路26を通じて一方の押さえ蓋16と第1のピストン13の間に、それぞれ圧縮空気を供給する。一方、第1及び第3の通路23,25は大気に開放する。これら圧縮空気の供給及び排出によって第1~第3のピストン13~15は密閉空間1cの内部を中間止め板18、仕切り板19及び他方の押さえ蓋17方向に移動する。
前記制動OFFの状態から、さらに第1及び第3の通路23,25を通じて他方の押さえ蓋17と第3のピストン15の間、及び仕切り板19と第2のピストン14の間にも圧縮空気を供給する。
前記部分制動の状態から、第2の通路24を通じた第3のピストン15と仕切り板19の間、及び第4の通路26を通じた一方の押さえ蓋16と第1のピストン13の間への圧縮空気の供給を停止し、大気に開放する。
6 永久磁石
11 シリンダ
12 ロッド
13 第1のピストン
14 第2のピストン
15 第3のピストン
16 一方の押さえ蓋
17 他方の押さえ蓋
18 中間止め板
19 仕切り板
22 ストッパ
23 第1の通路
24 第2の通路
25 第3の通路
26 第4の通路
27 ノズル
28,29 電磁弁
36 レバー
Claims (6)
- 両端を一体又は別体からなる押さえ蓋で閉じたシリンダと、
このシリンダの内部に、軸方向に適宜の間隔を有して固定された仕切り板及び中間止め板と、
前記シリンダの内部の前記一方の押さえ蓋と前記中間止め板の間を、シリンダの軸方向の移動自在に挿入した第1のピストンと、
前記シリンダの内部の前記中間止め板と前記仕切り板の間を、シリンダの軸方向の移動自在に挿入した第2のピストンと、
前記シリンダの内部の前記仕切り板と前記他方の押さえ蓋の間をシリンダの軸方向の移動自在に挿入した第3のピストンと、
基端に前記第3のピストンを取り付け、先端が前記仕切り板、前記第2のピストン、前記中間止め板、前記第1のピストン、及び前記一方の押さえ蓋を貫通して前記シリンダの外部に突出した、シリンダの軸方向に移動自在なロッドと、
前記ロッドの中間部に固定され、ロッドの前記移動時に前記第1又は第2のピストンを移動させるストッパと、
を備えたことを特徴とする3位置動作型アクチュエータ。 - 前記他方の押さえ蓋には、他方の押さえ蓋と第3のピストンの間に流体を供給又は排出する第1の通路を形成する一方、
前記シリンダの外周壁には、第3のピストンと仕切り板の間、仕切り板と第2のピストンの間、及び一方の押さえ蓋と第1のピストンの間に流体を供給又は排出する第2~第4の通路を形成すると共に、
中間止め板と第2のピストンで形成される空間内の流体を大気に開放するノズルを前記シリンダに設置したことを特徴とする請求の範囲第1項に記載の3位置動作型アクチュエータ。 - 請求の範囲第2項に記載の3位置動作型アクチュエータに電磁弁を前記他方の押さえ蓋に直接接続したことを特徴とする3位置動作型アクチュエータ。
- 前記電磁弁は2ポートを有する単動の常時は閉じた状態の電磁弁と、2ポートを有する単動の常時は開いた状態の電磁弁であることを特徴とする請求の範囲第3項に記載の3位置動作型アクチュエータ。
- 請求の範囲第1~4項の何れかに記載の3位置動作型アクチュエータを、制動のON-OFF切換装置のアクチュエータとして使用したことを特徴とする永久磁石式の渦電流式減速装置。
- 前記アクチュエータと磁石回動機構とを、レバーを介して接続したことを特徴とする請求項5に記載の永久磁石式の渦電流式減速装置。
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US14/434,850 US9476435B2 (en) | 2013-02-12 | 2014-02-12 | 3-position operating actuator and permanent-magnet eddy-current deceleration device |
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