CN1113358A - Servomotor - Google Patents

Servomotor Download PDF

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Publication number
CN1113358A
CN1113358A CN95102890A CN95102890A CN1113358A CN 1113358 A CN1113358 A CN 1113358A CN 95102890 A CN95102890 A CN 95102890A CN 95102890 A CN95102890 A CN 95102890A CN 1113358 A CN1113358 A CN 1113358A
Authority
CN
China
Prior art keywords
circuit board
pcb
printed circuit
servo motor
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN95102890A
Other languages
Chinese (zh)
Inventor
山野健治
柳川胜志
伊藤彰浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP4165094A external-priority patent/JPH07255148A/en
Priority claimed from JP6054263A external-priority patent/JPH07298555A/en
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Publication of CN1113358A publication Critical patent/CN1113358A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Transform (AREA)

Abstract

The invention provides a servo motor, which includes a printed circuit board, which is arranged on the outer end of the cylinder part on the reverse drive side end of the shell, and is in a complete closed state; a module, which is arranged on the inner surface of the printed circuit board, and can ensure the beam to spread along the axial direction of the servo motor; a turntable of a encoder, which is arranged on the shaft end passing through the shell; a notch window, which is arranged on the surface of the outer end of the cylinder part, and through which the module can pass radially; a window cover, which is detachably arranged on the window, and through which a cable can be led out; an electronic component and the like, which are arranged on the inner surface of the printed circuit board.

Description

Servomotor
The present invention relates to a kind of servo motor, have specific structure, be used to install, be particularly suitable for installing optical encoder such as optical encoder, magnetic coder or the such rotational position detector of induction code device.Servo motor is a kind of permanent magnet type synchronous motor or a kind of induction type motor that drives with converter.
Figure 23 is a front view, shows the cutaway view of servo motor major part in the prior art.In this figure, casing 1 is made up of driving side bracket 1a, frame 1b and anti-driving side bracket 1c.Unillustrated stator and rotor are inlaid within the casing 1.The driving side axle head passes the driving side of casing 1, and anti-driving side axle head passes the anti-driving side of casing 1.
The module 3a integral body of optical encoder 3 is inlaid in encoder carriage 201 the insides, and this carriage is secured to the anti-driving side end end face of casing 1 by attaching seat 201a.One printed circuit board (PCB) 4 is installed on the common end end face of encoder carriage 201 pillar 201b and module 3a, and electronic device etc. are installed on the printed circuit board (PCB).The rotating disk 3b of optical encoder 3 is positioned among the slit 3s of module 3, and is installed on the axle head 2b by sleeve 3c, fixes with fixed screw 3d again.Rotating disk 3b is fixed in sleeve 3c with quick-acting binding agents, perhaps tightens with the ring status nut, and still, rotating disk can directly be installed on the axle head 2b sometimes.Module 3a has light-emitting component 3x and photo detector 3y, and light can pass the unillustrated finedraw of rotating disk 3b.A cover plate 202 that is secured to casing 1 anti-driving side end end face is sealed encoder carriage 201, printed circuit board (PCB) 4 and optical encoder, in order to dustproof., a cable, its termination is welded in printed circuit board (PCB) 4 by hand, draws from cover plate 202 by cable bush 203.Encoder carriage 201 is horseshoe-shaped, does not have pillar 201b at the place, opposite of module 3a.Towards the slit 3s of merge module 3a radially, light-emitting component 3x and photo detector 3y then are integrated among the module rotating disk 3b by this horseshoe-shaped space.Can check and adjust the yardstick between rotating disk 3b and the module 3a from the shape of a hoof space of encoder carriage 201.
Figure 24 shows the section of the major part of second example in the prior art.The termination of cable 5 is secured to printed circuit board (PCB) 4 by guide connector 204, and cable 5 is drawn from cover plate 202 via cable bush 20.
In first example of prior art, encoder carriage 201 and cover plate 202 constitute a kind of dual structure.Thereby, respectively, between encoder carriage 201 and cover plate 202, just need radial gap a and b, and between the base plate of the electronic device 4a of printed circuit board (PCB) cover plate 202, just need axial air gap c.Secondly, the length of servo motor has strengthened, and adds a large amount of thickness d of the attaching seat 201a of encoder carriage 201 just.
In addition, in the first and second prior art examples, have the very big space of wiring need of work of the cable of many pilots, to the wiring work of printed circuit board (PCB) 4 by hand operation carry out, and the work of drawing very long cable 5 is very difficult.
The purpose of this invention is to provide a kind of servo motor, it occupies minimum space in the periphery of the rotation detector such such as optical encoder, exempted this dual structure of encoder carriage and cover plate, and cable has been drawn by the connector that can automatically be welded in printed circuit board (PCB).
The object of the present invention is achieved like this, and a kind of servo motor promptly is provided, and it comprises: a cylindrical portions may is made in anti-driving side one end of casing; One printed circuit board (PCB), the outer end that is secured to cylindrical portions may is to constitute the complete closed state; The standing part of one rotational position detection device is contained on the inner surface of printed circuit board (PCB); The rotating part that the turned position is detected is installed on the axle head that passes casing.Because this cylindrical portions may and printed circuit board (PCB) play a part encoder carriage and cover plate, just exempted this dual structure of encoder carriage and cover plate, reduce occupied space in rotational position detection device and printed circuit board (PCB) periphery, and reduced the number of spare parts of servo motor.And, because outside the outer surface of printed circuit board (PCB) was exposed to, its cooling characteristics was improved.
The present invention also provides a kind of servo motor, and it comprises: a cylindrical portions may is positioned at anti-driving side one end of casing; One printed circuit board (PCB) is secured to the outer end of cylindrical portions may; To constitute the complete closed state; The module of optical encoder is installed on the inner surface of printed circuit board (PCB), make light along servo motor axially; The rotating disk of optical encoder is installed on the axle head that passes casing, further comprises the outer rim among the slit that is positioned at module; A kerf formula window is opened in the outer end face place of cylindrical portions may, and module can be towards radially passing this window; And a window lid, can be installed on the notch-cut type window with unloading.Because cylindrical portions may and printed circuit board (PCB) play a part encoder carriage and cover plate in the prior art, just exempted this dual structure of encoder carriage and cover plate, reduce space occupied in the periphery of optical encoder and printed circuit board (PCB), and reduced the number of spare parts of servo motor.And, because outside the outer surface of printed circuit board (PCB) was exposed to, its cooling characteristics was improved.Assembly work obtains simplifying, so that printed circuit board (PCB) and module can radially be delivered to the normal position by the notch-cut type window court of cylindrical portions may, facing to the rotating disk that is installed on the diameter of axle.This transmission is possible, because the notch-cut type window is opened on the outer end face of cylindrical portions may.
The base plate of cylindrical portions may one preferably is made in motor one side, and disposes thermal insulating device between the end face of the end of base plate and casing.This thermal insulating device can prevent that heat from passing to the space that is used for optical encoder and printed circuit board (PCB) etc.
The present invention also provides a kind of servo motor, and it comprises: a cylindrical portions may is formed at anti-driving side one end of casing; One printed circuit board (PCB) is secured to the outer end of cylindrical portions may, to constitute the complete closed state; The module of optical encoder is installed on the inner surface of printed circuit board (PCB), make light along servo motor axially; The rotating disk of optical encoder is installed on the axle head that passes casing, also comprises the outer rim among the slit that is positioned at module; One assembly fixture aperture, the axle center that is opened in printed circuit board (PCB) is located; Assembly fixture embeds the assembly fixture aperture from the outside and rotating disk can be installed with unloading; Stopple can be installed in place, assembly fixture aperture with unloading.Because column part and printed circuit board (PCB) play a part encoder carriage and cover plate in the prior art, with aforementioned the same, just exempted this dual structure of encoder carriage and cover plate, reduce space occupied in the periphery of optical encoder and printed circuit board (PCB), and reduced the number of spare parts of servo motor.And, because outside the outer surface of printed circuit board (PCB) was exposed to, its cooling characteristics was improved.Assembly work obtains simplifying, and makes assembly fixture can embed the device frame aperture at place, printed circuit board (PCB) axle center from the outside, and temporarily holds rotating disk together with printed circuit board (PCB) and module.And they can be engaged in assembling in the face of casing, and axle head is towards axially passing this casing.
Axle head preferably disposes attaching seat and axially extended screw hole along axle of the axis hole of the rotating disk of packing into, the composition of assembly fixture is: one is loaded on the assembly fixture axle of axis hole seamed edge, one ring around the assembly fixture axle and the assembly fixture aperture of packing into, one is configured in the ring end and the tight bellows of contact rotating disk, and one with assembly fixture axle and ring formation one and the flange that contacts with printed circuit board (PCB); Dispose an axle vacuum plant that can apply vacuum pressure to the space between bellows and the assembly fixture axle; Rotating disk is to rely on screw to be screwed into described screw hole and to be installed on the axle head.Assembly fixture is temporarily held rotating disk together with printed circuit board (PCB) and module.Because the pairing screw hole of screw that is used for rotating disk is fixed on the servo motor axial end is towards axial, the assembly fixture aperture above the printed circuit board (PCB) also is used for tightening the screw with screwdriver.
A sleeve of fixing rotating disk above preferably stretches out axle head, this sleeve can temporarily be contained on the temporary axle of the assembly fixture with flange and temporary axle, and temporarily fix with screw radially, an operation window that is used for sleeve is fixed in axle head is arranged on cylindrical portions may, and a window plug can be installed on the operation window with unloading.Assembly fixture is temporarily held rotating disk together with printed circuit board (PCB) and module.After the assembling, can unload by operation window from the screw that radially sleeve is fixed in the temporary axle and to take off.And the position relation after the assembling between rotating disk and the module can be checked definitely by operation window.
Assembly fixture preferably comprises a flange and a conical collet, and conical collet can be flexibly and can be loaded on the axis hole of rotating disk with unloading, or is loaded on the axis hole on fixing the sleeve of rotating disk.Assembly fixture is temporarily held rotating disk together with printed circuit board (PCB) and module.Be used for temporary transient installation without any need for screw.
The present invention also provides a kind of servo motor, and it comprises: a cylindrical portions may that is made in the anti-driving side of casing one end place; One printed circuit board (PCB) is secured to the outer end of cylindrical portions may, to constitute the complete closed state; The module of one optical encoder is installed on the inner surface of printed circuit board (PCB), makes light along servo motor radially; And the rotating disk of optical encoder, be installed on the axle head that passes casing, also comprise a ring flat-plate, be set in place the outer rim place among the slit of module.Because cylindrical portions may and printed circuit board (PCB) play a part encoder carriage and cover plate in the prior art, with aforementioned the same, just exempted this dual structure of encoder carriage and cover plate, reduce occupied space in optical encoder and printed circuit board (PCB) periphery, and reduced the number of spare parts of servo motor.And, because outside the outer surface of printed circuit board (PCB) was exposed to, its cooling characteristics was improved.Owing to ring flat-plate is axially to be assembled among the slit of module by migration, assembly work is simplified, and without any need for notch-cut type window, operation window or assembly fixture.
The present invention also provides a kind of servo motor, and it comprises: a printed circuit board (PCB) that is secured to the projection piece that protrudes from the anti-driving side of servo motor casing end end face; The module of optical encoder is installed on the outer end face of printed circuit board (PCB), thus make light along servo motor axially; The rotating disk of optical encoder is installed on the axle head that passes casing by sleeve, also comprises the outer rim among the slit that is positioned at module; And cover plate, complete closed printed circuit board (PCB), optical encoder and sleeve; Wherein, base diameter is that the ring groove shape of α is formed in the place, bottom that diameter is the sleeve of γ; Internal diameter is that the temporary installing hole of β is fitted to annular groove and is positioned at the place, axle center; And internal diameter is that one of δ sets the hole and is located at prejudicially on radially opposite with the module position, and two holes are formed on above the printed circuit board (PCB); Temporary installing hole and set the hole and couple together by the connecting hole that width is at least β; And keep following relation:
α＜β＜γ＜δ。
Because the projection piece is very simple, has just exempted encoder carriage and this dual structure of cover plate in the prior art, has reduced space occupied in the periphery of optical encoder, and has reduced the number of spare parts of servo motor.Assembling printed circuit board (PCB) and rotating disk carry out under plumbness.The sleeve that rotating disk is installed in the above is after the eccentric position place sets the hole, and again towards radially passing to the axle center, and the annular groove of sleeve is installed on the temporary installing hole.Because γ＜δ, this embedding is possible, and owing to α＜β＜γ, annular groove can be installed on the temporary installing hole again.So, unless printed circuit board (PCB) has formed towards passing a temporary transient assembly that just can not get loose with aforementioned opposite direction with rotating disk.This temporary transient part can be secured to the temporary transient assembly of motor.
Order of the present invention also provides a kind of servo motor, and it comprises: a printed circuit board (PCB) that is installed in the projection piece that protrudes from the anti-driving side of servo motor casing end end face; The module of one optical encoder is installed on the outer surface of printed circuit board (PCB), and make light along servo motor axially; The rotating disk of optical encoder is installed on the axle head that passes casing by sleeve, also comprises the outer rim that is positioned among the module slit; And cover plate, complete closed printed circuit board (PCB), optical encoder and sleeve; Wherein, base diameter is that the ring groove shape of α is formed in the bottom of footpath for the sleeve of γ; Internal diameter is the temporary installing hole of β, is fitted to annular groove and is positioned at the axle center, is formed on the printed circuit board (PCB); The temporary installing hole is at least outer β, be communicated in printed circuit board (PCB) towards opposite a kerf radially with module by width; And keep following relation:
α＜β＜δ。
Because the projection piece is very simple, one as described above, just exempted encoder carriage and this dual structure of cover plate in the prior art, reduced space occupied in the optical encoder periphery, and reduced the number of spare parts of servo motor.Assembling printed circuit board (PCB) and rotating disk carry out under plumbness.The sleeve that is installed in rotating disk in the above is after the place, outer of printed circuit board (PCB) embeds by otch, and again towards radially passing to the axle center, and the annular groove of sleeve is fitted to the temporary installing hole.Because α＜β＜γ, annular groove can be loaded on the temporary installing hole.So, unless printed circuit board (PCB) and rotating disk have formed towards passing the temporary transient assembly that just can not get loose in the opposite direction with aforementioned side.This assembly can be secured to the temporary transient assembly of motor.
The present invention also provides a kind of servo motor, and it comprises: a cylindrical portions may is made in anti-driving side one end of servo motor casing; One printed circuit board (PCB) is secured to the outer end of cylindrical portions may, thereby constitutes the complete closed state; A device among the luminescent device of optical encoder and the sensitive device is installed on the inner surface of printed circuit board (PCB), thus make light along servo motor axially; The luminescent device of optical encoder and another device among the sensitive device are contained on the end surface of casing; One rotating disk of optical encoder is installed on the axle head that passes casing, also comprises the outer rim between a described device and described another device; And electrical connection arrangement, be used to connect luminescent device and sensitive device.Because cylindrical portions may and printed circuit board (PCB) play a part encoder carriage and cover plate in the prior art, just exempted this dual structure of encoder carriage and cover plate, reduce space occupied in the periphery of optical encoder and printed circuit board (PCB), and reduced the number of spare parts of servo motor.And, because outside the outer surface of printed circuit board (PCB) was exposed to, its cooling characteristics was improved.Because luminescent device is what separate with sensitive device, assembly work is just very simple, need only successively luminescent device, rotating disk and above sensitive device is installed printed circuit board (PCB) be assemblied in above the casing.
The present invention also provides a kind of servo motor, and it comprises: a printed circuit board (PCB) is secured to the projection piece that protrudes from the anti-drive end end face of servo motor casing; A device among the luminescent device of optical encoder and the sensitive device is installed on the inner surface of printed circuit board (PCB), thus make light along servo motor axially; The luminescent device of optical encoder and another device among the sensitive device are secured on the encoder cover plate, and cover plate is columnar, has base plate, are secured to the anti-driving side end end face of casing; One rotating disk of optical encoder is installed on the axle head that passes casing, also comprises the outer rim between a described device and described another device; And electrical connection arrangement, be used to connect luminescent device and sensitive device.Because the projection piece is very simple, has just exempted this dual structure of encoder carriage and cover plate, has reduced space occupied in the optical encoder periphery, and has reduced the number of spare parts of servo motor.Because luminescent device is what to separate with sensitive device, need only successively printed circuit board (PCB), sensitive device, rotating disk and above luminescent device is installed the encoder cover plate be assemblied on the casing.
The present invention also provides a kind of servo motor, and it comprises: a cylindrical portions may is formed at the anti-driving side one end place of casing; One printed circuit board (PCB) has electric-conductor on its inboard, is secured to the outer end of cylindrical portions may, thereby constitutes the complete closed state; One rotational position detection device is received within by within cylindrical portions may and the formed space of printed circuit board (PCB); An interface unit in male end or the female end interface unit is connected with printed circuit board (PCB); Wherein, an outer cover of interface unit is contained in the inboard of printed circuit board (PCB); The electric-conductor of connector connects and is fixed in the electric-conductor of printed circuit board (PCB) inner crest face; A kerf formula window is opened in the outer end face place of cylindrical portions may; And outer cover passes and has a liner cuts formula window.
The present invention also provides a kind of servo motor, and it comprises: a cylindrical portions may is formed on anti-driving side one end of casing; One printed circuit board (PCB) has electric-conductor on its inboard, is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state; One rotational position detection device is received within the formed inner chamber of cylindrical portions may and printed circuit board (PCB); And an interface unit of male end or female end connector, be connected with printed circuit board (PCB); Wherein, an outer cover of interface unit is secured to the outside of printed circuit board (PCB); The electric-conductor of interface unit connects and is fixed in the electric-conductor of printed circuit board (PCB) by a window of printed circuit board (PCB); And outer cover covers this window.
The present invention also provides a kind of servo motor, and it comprises: an encoder cover plate, have base plate, and be installed in the anti-driving side one end place of casing; One printed circuit board (PCB) and a rotational position detection device are received among the inner chamber of encoder cover plate; And an interface unit of connector, or male end or female end, be connected with printed circuit board (PCB); Wherein, the outer cover of interface unit is contained on the printed circuit board (PCB); The electric-conductor of interface unit connects and is fixed in the electric-conductor of printed circuit board (PCB); A kerf formula window is opened in the internal end surface place of encoder cover plate, and an outer cover of interface unit passes the notch-cut type window that has liner.
The present invention also provides a kind of servo motor, and it comprises: an encoder cover plate, have base plate, and be installed in the anti-driving side one end place of casing; One printed circuit board (PCB) and a rotational position detection device are received among the inner chamber of encoder; And an interface unit of connector, or male end or female end, be connected with printed circuit board (PCB); Wherein, an outer cover of interface unit is installed on the described printed circuit board (PCB); The electric-conductor of interface unit connects and is fixed in the electric-conductor of printed circuit board (PCB); One window is offered to such an extent that pass the encoder cover plate; And the outer cover of another interface unit passes this notch-cut type window that has liner.
Have the servo motor that is arranged in the connector on the printed circuit board (PCB) at these, pilot can be drawn from the inner chamber of servo motor by connector, and connector can automatically be welded on the printed circuit board (PCB).Thereby this has just reduced the space that is used to draw many pilots.Except original conducting function; connector can protect inner chamber not have foreign matter and dust enters; this is because connector self is sealed and is used for leading-out connector window or notch-cut type window, and the heat that electric device generated among the radiation-curable inner chamber of connector outer cover that mainly is made of metal.
Below, will describe embodiments of the invention in conjunction with the accompanying drawings in detail, in the accompanying drawing:
Fig. 1 is the cutaway view of forward sight, shows the major part of the first embodiment servo motor;
Fig. 2 is the cutaway view at A-A place among Fig. 1;
Fig. 3 is the resulting view of direction of arrow B in Fig. 2;
Fig. 4 is the cutaway view of forward sight, has shown the major part of the second embodiment servo motor;
Fig. 5 is the cutaway view of forward sight, shows the major part of the 3rd embodiment servo motor;
Fig. 6 is a front view, shows the assembly method of the major part of servo motor among Fig. 5;
Fig. 7 is the cutaway view of forward sight, shows the major part of the 4th embodiment servo motor;
Fig. 8 is the cutaway view at C-C place, Fig. 7 middle section;
Fig. 9 is the assembly fixture of the 5th embodiment and the longitudinal profile view and the rotation end view of sleeve;
Figure 10 is the cutaway view of forward sight, shows the major part of the 6th embodiment servo motor;
Figure 11 is the cutaway view of forward sight, shows the major part of the 7th embodiment servo motor;
Figure 12 is the front view of printed circuit board (PCB) among Figure 11, module and rotating disk;
Figure 13 is the front view of the 8th embodiment printed circuit board (PCB) and module;
Figure 14 is the cutaway view of forward sight, shows the major part of the 9th embodiment servo motor;
Figure 15 is the cross section view of D-D section among Figure 14;
Figure 16 is the cutaway view of forward sight, shows the major part of the tenth embodiment servo motor;
Figure 17 is the cutaway view of forward sight, shows the major part of the 11 embodiment servo motor;
Figure 18 is the cross section view of F-F section among Figure 17;
Figure 19 is the cutaway view of forward sight, shows the major part of the 12 embodiment servo motor;
Figure 20 is the cutaway view of forward sight, shows the major part of the 13 embodiment servo motor;
Figure 21 is the cutaway view of forward sight, shows the major part of the 14 embodiment servo motor;
Figure 22 is the cutaway view of forward sight, shows the major part of the 15 embodiment servo motor;
Figure 23 is the cutaway view of forward sight, shows the major part of a kind of servo motor in the prior art;
Figure 24 is the cutaway view of another kind of servo motor major part in the prior art.
In first embodiment shown in Fig. 1,2 and 3, casing 1 constitutes by driving side bracket 1a, frame 1b and anti-driving side bracket 1c.Stator of Huaing and rotor are not inlaid within the casing 1.Driving side axle head 2a passes the driving side of casing 1, and anti-driving side axle head 2b passes the anti-driving side of casing 1.
Cylindrical portions may 11 is arranged on anti-driving side one end of casing 1, and printed circuit board (PCB) 4 is installed in the outer end of cylindrical portions may 11, constitutes the complete closed state.The module 3a of optical encoder 3 is installed on the inner surface of printed circuit board (PCB) 4, make light towards servo motor axially.The outer rim of the rotating disk 3b of optical encoder 3 is positioned among the slit 3S of module 3a, and rotating disk 3b is installed in above the axle head 2b that passes casing 1.Offer an open type window 12 at the outer end face place of cylindrical portions may 11, module 3a can radially pass from this window, and detachable window lid 13 is installed in above the open type window 12.
Rotating disk 3b is contained on the axle head 2b by sleeve 3c, and fixes with fixed screw 3d, but rotating disk also can be fixed on the sleeve with quick-acting binding agents sometimes, perhaps tightens with the ring-type nut.Have, rotating disk 3b can directly be installed on the axle head 2b again.Module 3a has a light-emitting component 3x and a photo detector 3y, and light can see through some (not shown) finedraws of rotating disk 3b.Cable 5 is drawn from window lid 13, perhaps can draw the cable 5a shown in chain-dotted line from the outside of printed circuit board (PCB) 4.Electronic unit 4a etc. is installed on the inner surface of printed circuit board (PCB) 4, still, if they itself are dust-proof types, and have insulating capacity and to the resistance of external force, then can be contained on the outer surface of printed circuit board (PCB) 4.Printed circuit board (PCB) can be an insulation board, with printing method conductor laying (so-called general printed circuit board (PCB)) on it, or a metallic plate that has insulation film, use printing method conductor laying (so-called operplate printing circuit board) on it.Metallic circuit has cooling characteristics preferably.
According to first embodiment, because cylindrical portions may 11 and printed circuit board (PCB) 4 play a part encoder carriage 201 of the prior art and cover plate 202, just exempted this dual structure of encoder carriage 201 and cover plate 202, reduce space occupied in the periphery of encoder 3, and reduced the number of spare parts of servo motor.Secondly, because the outer surface of printed circuit board (PCB) is exposed to the external world, its cooling characteristics improves.Especially, when using the operplate printing circuit board, cooling characteristics obtains bigger improvement.Because the assembling work of first embodiment is so simple, so that printed circuit board (PCB) 4(is equipped with under the situation of module 3a and electronic device 4a on the surface within it) can rely on module is sent on the normal position towards the notch-cut type window 12 that radially passes cylindrical portions may.Assembling is by realizations such as tighten the screws.Tightening fixed screw so that rotating disk 3b is attached to when axle head 2b gets on, notch-cut type window 12 has played effect.
The difference of second embodiment shown in Figure 4 and first embodiment is that base plate 21 is made in leaning on motor one side and between the distal end faces of base plate 21 and casing 1 thermal insulating device being set of cylindrical portions may 11.Projection piece 22 is arranged at the end (the perhaps distal end faces of base plate 21) of casing 1, and the interval 23 that is formed between base plate 21 and casing 1 distal end faces becomes thermal insulating device.Liner 24 can be guaranteed to constitute one by printed circuit board (PCB), cylindrical portions may 11 and base plate 21 formed dustproof space for optical encoder 3a etc.Except this structure, thermal insulation panel commonly used can be inlaid between base plate 21 and casing 1 distal end faces.According to second embodiment, the heat that sends from motor can be prevented from reaching the space that is used for optical encoder etc.
The 3rd embodiment that is shown in Fig. 5 and 6 shows a kind of structure, even rotating disk 3b can axially hindering in the slit 3S of module 3a to some extent during the notch-cut type window 12 of casing 1 in removing first and second embodiment, and also may be from axially being engaged in assembling work.In these figure, cylindrical portions may 11 is formed in anti-driving side one end of casing 1, and printed circuit board (PCB) 4 is secured to the outer end of cylindrical portions may 11, thereby constitutes the complete closed state.The module 3a of optical encoder 3 is installed on the inner surface of printed circuit board (PCB) 4, make light towards servo motor axially.The outer rim of the rotating disk 3b of optical encoder 3 is positioned among the slit 3a of module 3, and rotating disk 3b directly, is not installed in via sleeve on the axle head 2b that passes casing 1.Rotating disk 3b is fixed on the axle head 2b by means of packing ring 2c and screw 2d.In structure hereto, just rotating disk 3b and syndeton between the axle head 2b are different from first and second embodiment, and other then all.Add one, the syndeton between this rotating disk 3b and the axle head 2b also can be used for first and second embodiment.
As characteristics among the 3rd embodiment, offer assembly fixture aperture 31 at the place, axle center of printed circuit board (PCB) 4, assembly fixture 32 can pass this aperture from the outside of printed circuit board (PCB) 4 and embed, and rotating disk 3b is removably mounted on the assembly fixture 32.Stopple 33 removably is secured to assembly fixture aperture 31, and attaching when the final step of assembling, prevents dust guaranteeing.An attaching seat 2e and the screw 2f of rotating disk 3b axis hole 3e of being used for packing into is arranged at axle head 2b.The detailed structure of assembly fixture 32 is illustrated with reference to Fig. 6.Assembly fixture 32 comprises following each several part: the assembly fixture axle 32a that is fitted to the seamed edge of rotating disk 3b axis hole 3e, ring 32b around the assembly fixture axle 32a and the assembly fixture aperture 31 of packing into, be arranged on ring 32b end and the tight bellows 32c of contact rotating disk 3b, and form the flange 32d of one and contact print circuit board 4 with assembly fixture axle 32a and ring 32b.Also be provided with the space that a vacuum extractor 32e is used between bellows 32c and assembly fixture axle 32a vacuum pressure is provided.Rotating disk 3b relies on screw 2d to be screwed into screw 2f and to be installed in above the axle head 2b.
The assemble method of the 3rd embodiment is described now.The ring 32b of assembly fixture 32 pack into assembly fixture aperture 31 and make flange 32d contact print circuit board 4 after, when the seamed edge of assembly fixture axle 32a contact rotating disk 3b axis hole 3e and vacuum extractor 32e were activated, bellows 32c was attracted on rotating disk 3b.Whereby, printed circuit board (PCB) 4 is temporarily held rotating disk 3b by assembly fixture 32.At this moment, the outer rim of rotating disk 3b is seated among the slit 3S of module 3a, and can guarantee the correct positioning relation between module 3a and the rotating disk 3b.After this, temporarily remain on printed circuit board (PCB) 4, module 3a and rotating disk 3b above the assembly fixture 32 towards axially being sent to casing 1, and when the axis hole 3e of rotating disk 3b packs axle head 2b into, free vacuum extractor, and lay down assembly fixture 32 with axle head 2b.Screw 2d is fixed in axle head 2b to rotating disk 3b.Simultaneously, unillustrated bolt of printed circuit board (PCB) 4 usefulness etc. is fixed in cylindrical portions may 11.Stopple 33 is secured to assembly fixture aperture 31, has so just finished assembling work.
According to the 3rd embodiment, the same with first embodiment, because cylindrical portions may 11 and printed circuit board (PCB) 4 play a part encoder carriage 201 of the prior art and cover plate 202, encoder carriage 201 and cover plate 202 this dual structures have just been exempted, reduce occupied space in encoder 3 peripheries, and reduced the number of spare parts of servo motor.Secondly, because the outer surface of printed circuit is exposed to the external world, its cooling characteristics is improved.Especially, when using the operplate printing circuit board, cooling characteristics is improved more.Compare with first embodiment, this embodiment and then need assembly fixture 32 still, because stopple 33 is sealed assembly fixture aperture 31, and does not adopt notch-cut type window 12, can dirt exclusion capabilities be guaranteed.
As a distinguishing characteristics among the 4th embodiment that is shown in Fig. 7 and 8, have assembly fixture aperture 41 at printed circuit board (PCB) 4 axle center places, assembly fixture 42 passes this aperture and embeds from the outside of printed circuit board (PCB) 4, but and rotating disk 3b demolition be installed on the assembly fixture 42.Stopple 43 is removably disposed on the assembly fixture aperture 42.In this case, rotating disk 3b is fixed on above the sleeve 3c that protrudes in axle head 2b.Sleeve 3c temporarily is fitted in above the temporary axle 42b of the assembly fixture 42 with flange 42a and temporary axle 42b, and can be temporarily fixed with screw 42c radially.The operation window 44 that is used for sleeve 3c is fixed in axle head 2b is arranged on above the cylindrical portions may 11, and window plug 45 removably is configured in above the operation window 44.
The assembly method of the 4th embodiment is described now.After the temporary axle 42b of assembly fixture 42 is fitted into assembly fixture aperture 41 and makes flange 42a contact print circuit board, the temporary axle 42b sleeve 3c of rotating disk 3b that packs into, and temporarily fix with screw 42c.Whereby, printed circuit board (PCB) 4 is temporarily held rotating disk 3b by assembly fixture 42, and can guarantee the correct positioning relation between module 3a and the rotating disk 3b.After this, temporarily remain on printed circuit board (PCB) 4, module 3a and rotating disk 3b above the assembly fixture 42 towards axially being sent to casing 1, and the sleeve 3c of rotating disk 3b is fitted in above the axle head 2b with axle head 2b.Rotating disk 3b is fixed on axle head 2b with fixed screw 3d.Simultaneously, unillustrated bolt of printed circuit board (PCB) 4 usefulness etc. is fixed in cylindrical portions may 11.Also have, screw 42c can disassemble by operation window 44 with screwdriver 46, and removal assembly fixture 42.Stopple 43 is secured to assembly fixture aperture 41, and window plug 45 is secured to operation window 44, and then, assembling work is finished.
According to the 4th embodiment, the same with first embodiment, because cylindrical portions may 11 and printed circuit board (PCB) 4 play a part encoder carriage 201 of the prior art and cover plate 202, just exempted dual structure, reduce the space that in encoder 3 peripheries, occupies, and reduced the number of spare parts of servo motor.Have, because the outer surface of printed circuit board (PCB) 4 is exposed to the external world, its cooling characteristics is improved again.Compare with first embodiment, this embodiment and then require assembly fixture 42, still, because stopple 43 seals assembly fixture aperture 41 and do not adopt notch-cut type window 12, and window plug 45 seals operation window 44, just guaranteed dirt exclusion capabilities.Positioning relation after the assembling between module 3a and the rotating disk 3b can be checked definitely by operation window 44.When using that one wherein screw 42c forms the long screw of one with screwdriver 46, operation window 44 can be made and like the notch-cut type window of offering in end, cylindrical portions may 11 outer end.
As the feature of the 5th embodiment that is shown in Fig. 9, assembly fixture 52 is made of flange 52a and conical collet 52b.Conical collet 52b flexibly and removably is loaded on the aperture of sleeve 3c, and is fixing rotating disk 3b(or directly be fitted to the axis hole (with the same axis hole of the 3rd embodiment central axis hole 3e) of rotating disk 3b on sleeve 3c).Identical among other structure and assembly method and the 3rd or the 4th embodiment.According to the 5th embodiment, various functions in the 4th embodiment and the effect, do not need to be used among the 4th embodiment temporary transient fixing screw.
In the 6th embodiment shown in Figure 10, cylindrical portions may 11 is made in anti-driving side one end of casing 1, and printed circuit board (PCB) 4 is secured to the place, outer end of cylindrical portions may 11, constitutes the complete closed state.The module 63a of optical encoder 63 is contained on the inner surface of printed circuit board (PCB) 4, and makes light towards servo motor radially.Among the ring flat-plate 63c at the rotating disk 63b of optical encoder 63 outer rim place is positioned at the slit 63S of module 63a, and rotating disk 3b is contained on the axle head 63b that passes casing 1.
According to the 6th embodiment, the same with first embodiment, because cylindrical portions may 11 and printed circuit board (PCB) 4 play a part encoder carriage 201 of the prior art and cover plate 202, encoder carriage 201 and cover plate 202 this dual structures have just been exempted, reduced in encoder 63 peripheral occupied spaces, and reduced the number of spare parts of servo motor.Secondly, because the outer surface of printed circuit board (PCB) 4 is exposed to the external world, its cooling characteristics is improved.Especially, when using the operplate printing circuit board, cooling characteristics improves more.In the 6th embodiment, because rotating disk 63b configuration has the ring flat-plate 63c of some unillustrated finedraws, difficulty is a bit a little for the preparation rotating disk, but, because as long as towards axially just being engaged in assembling to the slit 63S of ring flat-plate 63c shift-in module 63a to them, so assembly work is simplified, and have an advantage, promptly no longer need notch-cut type window, operation window or assembly fixture.
In being shown in the 7th embodiment of Figure 11 and 12, casing 1 is made of driving side bracket 1a, frame 1b and anti-driving side bracket 1c.Unillustrated stator and rotor are inlaid within the casing 1.Driving side axle head 2a passes the driving side of casing 1, and anti-driving side axle head 2b passes the anti-driving side of casing 1, with the same among first embodiment.
As feature among the 7th embodiment, printed circuit board (PCB) 72 is secured to the projection piece 71 that protrudes from the anti-driving side one end end face of casing 1, and the module 3a of optical encoder 3 is installed on the outer end face of printed circuit board (PCB) 72, make light towards servo motor axially.Electronic device 4a etc. is installed on the printed circuit board (PCB) 72.The rotating disk 3b outer rim of optical encoder 3 is positioned among the slit 3S of module 3a, and rotating disk 3b is installed in above the axle head 2b that passes casing 1 by sleeve 73.Cover plate 74 is sealed printed circuit board (PCB) 72, optical encoder 3 and sleeve 73 fully.Compare with example of the prior art, the position of printed circuit board (PCB) 72 and rotating disk 3b is opposite aspect organization plan.
As on the structure and the characteristics on the size, internal diameter is that the circumferential weld 73a of α is made in the sleeve 73 bottoms place that diameter is γ.On the other hand, on printed circuit board (PCB) 22, make be fitted to annular groove 73a and be positioned at the axle center, internal diameter is the temporary installing hole 72a of β, and towards the setting of the ground of opposite radial disbalance with module 3a, internal diameter be δ set hole 72b.Temporary installing hole 72a and set hole 72b and couple together by the connecting hole 72c that a width is at least β.Size relationship is:
α＜β＜γ＜δ。
According to the 7th embodiment, because projection piece 71 is very simple, just exempted encoder carriage 201 and cover plate 202 this dual structures in the prior art, reduce space occupied in the periphery of optical encoder 3, and reduced the number of spare parts of servo motor.
The assembly method that has much characteristic of the 7th embodiment is described now.
(1) stretches out axle head 2b from casing 1, be assembled into the temporary transient assembly of servo motor.
(2) be ready to be used for fixing the sleeve 73 of rotating disk 3b and be used for the printed circuit board (PCB) 72 of installed module 3a.
(3) under plumbness, after the eccentric position A place of printed circuit board (PCB) 72 set hole 72b, towards radially moving to axle center B, and the annular groove 73a of sleeve 73 was fitted to temporary installing hole 72a to sleeve 73 along arrow P at sleeve 73.Because γ＜δ, this embedding is possible, and owing to α＜β＜γ, annular groove 73a can be fitted to temporary installing hole 72a again.So, pass a temporary transient assembly that just can not get loose unless printed circuit board (PCB) 72 has formed towards the direction opposite with arrow P with rotating disk 3b.
(4) this temporary transient assembly is secured to the temporary transient assembly of servo motor (1), and tighten the screws 75 and fixed screw 3d.
The 8th embodiment that is shown in Figure 13 is the same with the 7th embodiment, just the printed circuit board (PCB) difference.Using Figure 11 when auxiliary, can see that internal diameter is that to be made in diameter be that α annular groove 73a is made in the place, sleeve 73 bottoms that diameter is γ to α annular groove 73a.On the other hand, on printed circuit board (PCB) 82, make be fitted to circumferential weld 73a and be positioned at the axle center, internal diameter is the temporary installing hole 82a of β.Temporary installing hole 82a by width be at least β, towards being communicated in the outer of printed circuit board (PCB) 82 with the rightabout otch 82c of module 3a.Size relationship is:
α＜β＜γ。
According to the 8th embodiment, the same with first embodiment, can exempt encoder carriage 201 and cover plate 202 this dual structures in the prior art, reduce occupied space in encoder 3 peripheries, and reduce the number of spare parts of servo motor.The assembly method of the 8th embodiment is to pass through otch 82c from printed circuit board (PCB) 82 outer rims, rather than set hole 72b, setting-in sleeve 73.
In being shown in the 9th embodiment of Figure 14 and 15, casing 1 is made of driving side bracket 1a, frame 1b and anti-driving side bracket 1c.Unillustrated stator and rotor are flush-mounted within the casing 1.Driving side axle head 2a passes the driving side of casing 1, and anti-driving side axle head 2b passes the anti-driving side of casing 1.
As the characteristics of this embodiment, cylindrical portions may 11 is made in the anti-driving side one end place of casing 1, and printed circuit board (PCB) 4 is secured to the outer end of cylindrical portions may 11, constitutes the complete closed state.The sensitive device 91y of optical encoder 91 together with electronic device 4a etc., is installed on the inner surface of printed circuit board (PCB), make light towards servo motor axially.Luminescent device 91x is installed on the end end face of casing 1 with screw 91a.The rotating disk 3b outer rim of optical encoder 91 is between luminescent device 91x and sensitive device 91y, and rotating disk 3b is installed on the axle head 2b by sleeve 3c.Luminescent device 91x and sensitive device 91y couple together by the connector 92 that has the male and female contact element respectively each other.Can adopt vinyl circuit or flexible print wiring board without connector 92.Printed circuit board (PCB) 4 can be general pattern, but when adopting the operplate printing circuit board, it has resistance and have cooling characteristics preferably external force.The position of luminescent device 91x and sensitive device 91y can exchange, but preferably the sensitive device 91y with more output line terminal is placed in printed circuit board (PCB) 4 places.Common pin-and-hole etc. can be used for correctly setting up between luminescent device 91x and the sensitive device 91y mutual optical axis and the position for the axle center.Sensitive device 91y is connected in printed circuit board (PCB) 4 with lead-in wire 91b line.Cable 5 preferably is connected in printed circuit board (PCB) 4.
According to the 9th embodiment, because cylindrical portions may 11 and printed circuit board (PCB) 4 play a part encoder carriage 201 of the prior art and cover plate 202, encoder carriage 201 and cover plate 202 this dual structures have just been exempted, reduce occupied space in encoder 91 peripheries, and reduced the number of spare parts of servo motor.Secondly, because the outer surface of printed circuit board (PCB) 4 is exposed to the external world, its cooling characteristics improves.Especially, when using the operplate printing circuit board, cooling characteristics improves more.As for assembling work, in the example of prior art, rotating disk 3b goes in the slit 3a that radially is embedded into module 3 by the space of the horseshoe shape of encoder carriage 201, and luminescent device 91x and sensitive device 91y form one in module.In this embodiment, assembly work obtains simplifying, and makes luminescent device 91x, rotating disk 3b and the printed circuit board (PCB) 4 that sensitive device 91y is installed can be assemblied in casing 1 successively, because luminescent device 91x separates with sensitive device 91y.
In being shown in the tenth embodiment of Figure 16, printed circuit board (PCB) 102 is secured to the projection piece 101 that protrudes from casing 1 anti-driving side one end end face, and the sensitive device 103y of optical encoder 103 is installed on the outer end face of printed circuit board (PCB) 102 so that light towards servo motor axially.Luminescent device 103x is installed on the encoder cover plate 104, and this cover plate is columnar, has base plate, is installed on the anti-driving side end end face of casing 1.The outer rim of rotating disk 3b is between luminescent device 103x and sensitive device 103y, and rotating disk 3b is installed on the axle head 2b that passes casing 1.Luminescent device 103x and sensitive device 103y are coupled together by connector 92 by this.
According to the tenth embodiment, because projection 101 is very simple, just exempted encoder carriage 201 and cover plate 202 this dual structures in the prior art, reduce space occupied in the optical encoder periphery, and reduced the number of spare parts of servo motor.The same simple among assembling work and the 9th embodiment, as long as successively printed circuit board (PCB) 102, sensitive device 103y, rotating disk 3b and encoder cover plate 104 that luminescent device 103x is housed have been assemblied in casing 1, because luminescent device 103x is what to separate with sensitive device 103y.
In the 11 embodiment that is shown in Figure 17 and 18, casing 1 is made of driving side bracket 1a, frame 1b and anti-driving side bracket 1c.Unillustrated stator and rotor are inlaid within the casing 1.Driving side axle head 2a passes the driving side of casing 1, and anti-driving side axle head 2b passes the anti-driving side of casing 1.
Cylindrical portions may 11 is made in anti-driving side one end of casing 1, and printed circuit board (PCB) 4, and the conductor side above it is towards inside, is secured to the outer end of cylindrical portions may 11 with helical 11a, constitutes the state of complete closed.The sensitive device 91y of optical encoder 91 together with electronic device 4a etc., is installed on the inner surface of printed circuit board (PCB) 4, thus light towards servo motor axially.Luminescent device 91x is installed on the distal end faces of casing 1 with screw 91a.The rotating disk 3b outer rim of optical encoder 91 is between luminescent device 91x and sensitive device 91y, and rotating disk 3b is installed on the axle head 2b by sleeve 3c.Printed circuit board (PCB) 4 can be general pattern, but when using the operplate printing circuit board, it has resistance and have cooling characteristics preferably external force.
As the characteristics of the 11 embodiment, on the male end of connector 111 or its female end, establish an interface unit, make it to be connected with printed circuit board (PCB) 4.The outer cover 111h of the male end 111a of connector 111 is contained in screw 112 on the inboard of printed circuit board (PCB) 4, and then the male end electric-conductor 111m of connector 111 can automatically weld and be fixed on the electric-conductor of printed circuit board (PCB) 4.End, outer end in cylindrical portions may 11 offers notch-cut type window 113, and outer cover 111h passes the notch-cut type window 113 that has liner 114.Connector 111 is towards axially, but connector 111x that also can be shown in chain-dotted line is such, towards radially.
According to the 11 embodiment, because pilot can be drawn from an inner chamber 110 that is made of and holds optical encoder 91 and printed circuit board (PCB) 4 cylindrical portions may 11 and printed circuit board (PCB) 4 via connector 111, and connector can automatically be welded in printed circuit board (PCB) 4, thereby does not just need to have connected occupied space for cable in the prior art example.Except original being electrically connected the function; connector 111 can also protect inner chamber 110 no foreign matters and dust to enter; what lean on is that connector self is sealed the notch-cut type window 113 that is used for leading-out connector 111, and the connector outer cover that mainly the is made of metal heat that electric device generated among can radiation lumens 110.
In being shown in the 12 embodiment of Figure 19, among the same optical encoder among Figure 17 and printed circuit board (PCB) 4 were received within inner chamber 110, this inner chamber was made of cylindrical portions may 11 and printed circuit board (PCB) 4.As the outstanding feature of the 12 embodiment, the male end of connector 121 or the interface unit of female end are connected with printed circuit board (PCB) 4.The outer cover 121h of connector 121 male end 121a is contained on the outside of printed circuit board (PCB) 4 with screw 122, and the male end 121a electric-conductor 121m of connector 121 can automatically be welded in by the window 123 of printed circuit board (PCB) 4 and be fixed on the electric-conductor device of printed circuit board (PCB) 4.Outer cover 121h can seal window 123.Connector 121 is towards radially, but the connector 121x that it also can be shown in chain-dotted line is like that towards axially.
According to the 12 embodiment, because pilot can be drawn from an inner chamber 110 that is made of and holds optical encoder 91 and printed circuit board (PCB) 4 cylindrical portions may 11 and printed circuit board (PCB) 4 via connector 121, this connector can automatically be welded in printed circuit board (PCB) 4 again, so just do not need to have connected occupied space for cable in the prior art example.Except original electric function; connector 121 can also protect inner chamber 110 no foreign matters and dust to enter; what lean on is to seal the notch-cut type window 123 that is used for leading-out connector 121 by connector self, and the connector outer cover that mainly the is made of metal heat that electric device generated among can radiation lumens.
In being shown in Figure 20 the 13 embodiment, cylindrical portions may 11 is made in anti-driving side one end of casing 1, and printed circuit board (PCB) 4, the connector above it faces inside, is secured to the outer end of cylindrical portions may, constitutes the complete closed state.The module 3a of optical encoder 3 is contained on the inner surface of printed circuit board (PCB) 4, and make light towards servo motor axially.The rotating disk 3b outer rim of optical encoder 3 is positioned within the slit 3a of module 3, and rotating disk 3b is contained on the axle head 2b that passes casing 1.
The outstanding feature of the 13 embodiment is the same with the 11 embodiment, and the male end of connector 111 or the interface unit of female end are connected with printed circuit board (PCB) 4.The outer cover 111h of connector 111 male end 111a is contained on the inboard of printed circuit board (PCB) 4 with screw 112, and the electric-conductor 111m of connector 111 male ends can automatically be welded in and be fixed in above the electric-conductor of printed circuit board (PCB) 4, be provided with in the end, outer end of cylindrical portions may 11 and offer notch-cut type window 113, and outer cover 111h passes the notch-cut type window 113 that has liner 114.Connector 111 is towards axially, but also can be towards radially.
According to the 13 embodiment, the same with the 11 embodiment, because pilot can be drawn from an inner chamber 110 that is made of and holds optical encoder 3 and printed circuit board (PCB) 4 cylindrical portions may 11 and printed circuit board (PCB) 4 via connector 121, this connector can automatically be welded in printed circuit board (PCB) 4, so just need not connect occupied space for cable in the prior art example.Except original conducting function; connector 111 can protect inner chamber 110 no foreign matters and dust to enter; what lean on is to seal the notch-cut type window 115 that is used for leading-out connector 111 by connector self, and the connector outer cover that mainly the is made of metal heat that electric device generated among can radiation lumens 110.
In being shown in the 14 embodiment of Figure 21, printed circuit board (PCB) 102 is secured to the projection of protruding 101 from casing 1 anti-driving side end end face.The sensitive device 103y of optical encoder 103 is installed on the outer end face of printed circuit board (PCB) 102, and make light towards servo motor axially.Luminescent device 103x is installed on the encoder cover plate 104, and it is columnar, has base plate, and is secured on the anti-driving side end end face of casing 1.The outer rim of rotating disk 3b is between luminescent device 103x and sensitive device 103y, and rotating disk 3b is installed on the axle head 2b that passes casing 1.
As one of the 14 embodiment outstanding characteristics, the male end of connector 141 or the interface unit of female end are connected with printed circuit board (PCB) 102.The outer cover 141h of connector 141 male end 141a is contained on the inboard of printed circuit board (PCB) 4, and the electric-conductor 141m of connector 141 male end 141a can automatically be welded in and be fixed in the electric-conductor of printed circuit board (PCB) 4.Inner end at encoder cover plate 104 offers notch-cut type window 142, and outer cover 141h passes the notch-cut type window 142 that has liner 143.
According to the 14 embodiment, the same with first embodiment, because pilot can be drawn among an inner chamber that holds optical encoder 103 and printed circuit board (PCB) 102 via connector 141, this connector can automatically be welded in printed circuit board (PCB) 4, so just do not need to have connected occupied space for cable in the prior art example.Except original conducting function; connector 141 can protect inner chamber 110 no foreign matters and dust to enter; what lean on is to seal the notch-cut type window 142 that is used for leading-out connector 141 by connector itself, and the connector outer cover that mainly the is made of metal heat that electric device generated among can radiation lumens 110.
Compare with the 14 embodiment, the 15 embodiment is suitable for the servo motor of diameter greater than the printed circuit board diameter.The layout of printed circuit board (PCB) 102, optical encoder 103 etc. and structure and the 14 embodiment are identical.
As the characteristics of the 15 embodiment, the encoder cover plate 150 that has base plate is quite big.It is provided with a male end 151a and a female end 151b of connector 151.The outer cover 151h of connector 151 male end 151a is installed on the printed circuit board (PCB) 102, and the electric-conductor 151m of connector 151 male end device 151a can automatically be welded in and be fixed on the electric-conductor of printed circuit board (PCB) 102.These devices all are received among the inner chamber 110 of encoder cover plate 150.Also have, the outer cover 151i of connector 151 female end 151b passes the window 152 that has liner 153.
According to the 15 embodiment, because pilot can be drawn among an inner chamber 110 that holds optical encoder 103 and printed circuit board (PCB) 102 by connector 151, this connector can automatically be welded in printed circuit board (PCB) 102, so just do not need to have connected occupied space for cable in the prior art.Except original conducting function; connector 151 can protect inner chamber 110 no foreign matters and dust to enter; what lean on is to seal the window 152 that is used for leading-out connector 151 by connector itself, and the connector outer cover that mainly the is made of metal heat that electric device generated among can radiation lumens 110.
According to the present invention, just like above-mentioned.End by means of the cylindrical portions may at the anti-driving side end place that printed circuit board (PCB) is secured to the servo motor casing of making, thereby constitute the complete closed state, just can exempt common encoder carriage and this dual structure of cover plate, minimizing rotational position detection device (such as, optical encoder) occupied space in the periphery, and reduce the number of spare parts of servo motor, and the cooling characteristics of printed circuit board (PCB) improves, because it is exposed to the external world.
By means of constituting inner chamber by cylindrical portions may that has base plate and printed circuit board (PCB), and inner chamber is loaded on the anti-driving side end of casing by some simple protrusion pieces of protruding from the casing distal end faces or exhausted plate of the heat of setting, can prevent that the heat that comes from motor from reaching the inner chamber that is used for optical encoder and printed circuit board (PCB).
Offer the notch-cut type window by means of the outer end face place in cylindrical portions may, the printed circuit board (PCB) that has module can be sent to by the way that makes module pass the notch-cut type window and be assemblied on the normal position.
Be used for temporarily supporting printed circuit board (PCB) and the detachable rotating disk of separating twelve Earthly Branches chengguang encoder that has module by means of assembly fixture of preparation, and on printed circuit board (PCB) assembly fixture aperture that assembly fixture can be installed of configuration, just can exempt and be unfavorable for dustproof notch-cut type window.When rotating disk temporarily is fixed on the assembly fixture with radially screw, pass the outer surface of cylindrical portions may and offer operation window so that by operation window with the screwdriver screw that gets loose.By operation window, can check definitely in the relation of the position between module and the rotating disk after the assembling.When assembly fixture had vacuum extractor or elastic cone collet with temporary transient supporting turntable, being used for temporary transient fixing screw and operation window just became unwanted.
Except the temporary installing hole of assembly fixture, on printed circuit board (PCB), be provided with and set hole or notch-cut type window, between printed circuit board (PCB) and the module, vertically geometrical interference problem can be resolved on their normal position, and the relative dimensions between rotating disk and the module can easily obtain checking and adjusting.
By means of the ring flat-plate that is provided with finedraw on the rotating disk outer rim, assembly work is simplified, and has not needed operation window or notch-cut type window.
By means of the luminescent device and the sensitive device of separate configuration optical encoder, assembly work can be simplified to them as long as assembled vertically.
By means of drawing pilot, just reduced the space that occupies in peripheral place such as the such rotational position detection device of optical encoder by the connector that can automatically be welded in printed circuit board (PCB).Because automatic brazing, just exempted common complicated weld job, and owing to shortened the cable that leads to servo amplifier etc., intermediate connector just becomes unnecessary.Except original conducting function; connector can protect inner chamber not have foreign matter and dust enters; what lean on is window or the notch-cut type window of being sealed the electric-conductor that is used for leading-out connector by connector itself, and the heat that electric device generated among the radiation-curable inner chamber of connector outer cover that mainly is made of metal.

Claims (16)

1, a servo motor comprises:
One cylindrical portions may is positioned at anti-driving side one end of a casing;
One printed circuit board (PCB) is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
The standing part of one rotational position detection device is installed on the inner surface of described printed circuit board (PCB); And
The rotating part of one described rotational position detection device is installed on the axle head that passes described casing.
2, a servo motor comprises:
One cylindrical portions may is positioned at anti-driving side one end of a casing;
One printed circuit board (PCB) is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
The module of one optical encoder is installed on the inner surface of described printed circuit board (PCB) so that light along described servo motor axially;
The rotating disk of one described optical encoder is installed on the axle head that passes described casing, further comprises the outer rim of the slit that is arranged in described module;
A kerf formula window is opened in the outer end face place of described cylindrical portions may, and described module can be towards radially passing this window; And
One window lid removably is installed on the described notch-cut type window.
3, servo motor according to claim 2, wherein, a base plate of described cylindrical portions may is arranged on a side of described motor, and a thermal insulating device is arranged between the end end face of described base plate and described casing.
4, a servo motor comprises:
One cylindrical portions may is formed in the anti-driving side one end place of a casing;
One printed circuit board (PCB) is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
The module of one optical encoder is contained on the inner surface of described printed circuit board (PCB), thus make light along described servo motor axially;
The rotating disk of one described optical encoder is installed on the axle head of stating casing that passes, and further comprises the outer rim of the slit that is arranged in described module;
One assembly fixture aperture, the axle center that is opened in described printed circuit board (PCB) is located;
One assembly fixture inserts described assembly fixture aperture from the outside and described rotating disk removably is installed; And
One stopple can be installed in place, described assembly fixture aperture with unloading.
5, servo motor according to claim 4, wherein,
Described axle head has the attaching seat of the axis hole that is fitted into described rotating disk and along described axial screw hole;
Described assembly fixture by the assembly fixture axle of the seamed edge that is fitted to described axis hole, round the ring in the described assembly fixture axle and the described assembly fixture aperture of packing into, be configured in the place, described ring end and the tight bellows of the described rotating disk of contact, and the flange composition that forms one with described ring and contact with described assembly fixture axle with described printed circuit board (PCB);
One vacuum extractor is used to apply vacuum pressure to the space between described bellows and the described assembly fixture axle; And
Described rotating disk is installed on the axle head by a screw is screwed into described screw hole.
6, servo motor according to claim 4, wherein,
One sleeve, it stretches out described axle head, and described rotating disk is fixed on this sleeve;
Described sleeve can temporarily be contained on the temporary axle of the assembly fixture with a flange and a temporary axle, and temporarily fixes with screw radially;
One is arranged on the operation window on the described cylindrical portions may, is used for described sleeve is fixed in described axle head; And
One window plug can be installed on the described operation window with unloading.
7, servo motor according to claim 4, wherein,
Described assembling comprises a flange and a conical collet;
Described conical collet can be flexibly and can be loaded in the axis hole of described rotating disk with unloading, or is loaded in the axis hole of the sleeve that a rotating disk is fixed thereon.
8, a kind of servo motor comprises:
One cylindrical portions may is positioned at the anti-driving side one end place of casing;
One printed circuit board (PCB) is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
The module of one optical encoder is installed on the inner surface of described printed circuit board (PCB), and make light towards described servo motor axially; And
The rotating disk of one described optical encoder is installed on the axle head that passes described casing, further comprises a ring flat-plate, is arranged on its periphery and is positioned among the slit of described module.
9, a servo motor comprises:
One printed circuit board (PCB) is secured on the projection piece that protrudes from the anti-driving side of the casing of described servo motor end end face;
The module of one optical encoder is installed on the outer end face of described printed circuit board (PCB), and makes light along described servo motor radially;
The rotating disk of one optical encoder is installed on the axle head that passes described casing by a sleeve, further comprises the outer rim among the slit that is positioned at described module; And
One cover plate, the described printed circuit board (PCB) of complete closed, optical encoder and sleeve; Wherein:
One base diameter is that the ring groove shape of α is formed in the place, bottom that diameter is the described sleeve of γ;
One internal diameter is the temporary installing hole of β, be fitted to described annular groove and be positioned at axle center place, and an internal diameter is the hole of setting of δ that it is positioned at locate radially opposite with described module prejudicially; This two hole is formed on the described printed circuit board (PCB);
Described temporary installing hole and the described hole of setting couple together by the connecting hole that width is at least β; And
Following relation is arranged between them:
α＜β＜γ＜δ。
10, a servo motor comprises: a printed circuit board (PCB) is secured on the projection piece that protrudes from the anti-driving side of the casing of described servo motor end end face;
The module of one optical encoder is installed on the outer surface of described printed circuit board (PCB), and make light along described servo motor axially;
The rotating disk of one optical encoder is installed on the axle head that passes described casing by sleeve, further comprises the outer rim among the slit that is positioned at described module; And
One cover plate, the described printed circuit board (PCB) of complete closed, optical encoder and sleeve; Wherein
One base diameter is that the ring groove shape of α is formed in the place, bottom that diameter is the described sleeve of γ;
One internal diameter is the temporary installing hole of β, is fitted to described circumferential weld and is positioned at the place, axle center, is formed on above the described printed circuit board (PCB);
Described temporary installing hole is at least outer β, be communicated in described printed circuit board (PCB) towards opposite otch radially with described module by width; And
Following relation is arranged between them:
α＜β＜γ。
11, a servo motor comprises:
One cylindrical portions may is made in the anti-driving side one end place of a casing of described servo motor;
One printed circuit board (PCB) is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
A device among the luminescent device of one optical encoder and the sensitive device is installed on the inner surface of described printed circuit board (PCB), and make light along described servo motor axially;
The luminescent device of described optical encoder and another device among the sensitive device are contained on the end surface of described casing;
The rotating disk of one optical encoder is installed in the axle head end of passing described casing, further comprises the outer rim between a described device and described another device; And
One electrical connection arrangement is used to connect described luminescent device and described sensitive device.
12, a servo motor comprises:
One printed circuit board (PCB) is secured to the projection piece that protrudes from the anti-driving side end end face of described servo motor casing;
A device among the luminescent device of optical encoder and the sensitive device is installed on the inner surface of described printed circuit board (PCB), and make light along described servo motor axially;
The luminescent device of described optical encoder and another device among the sensitive device are contained on the encoder cover plate, and cover plate is columnar, has base plate, are secured to the anti-driving side end end face of described casing;
One rotating disk of described optical encoder is installed on the axle head end of passing described casing, further comprises the outer rim between a described device and described another device; And
One electrical connection arrangement is used to connect described luminescent device and described sensitive device.
13, a servo motor comprises the cylindrical portions may that is formed on the anti-driving side of casing one end place;
One printed circuit board (PCB) has electric-conductor on its inboard, is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
One rotational position detection device is received within by within described cylindrical portions may and the formed space of described printed circuit board (PCB); And
A connector spare, or male end or female end are connected with described printed circuit board (PCB), wherein
One outer cover of described interface unit is contained in the inboard of described printed circuit board (PCB);
The electric-conductor of described interface unit connects and is fixed in the described electric-conductor of described printed circuit board (PCB) inner crest face;
A kerf formula window is opened in the outer end face place of described cylindrical portions may; And
Described outer cover passes the described notch-cut type window that has liner.
14, a servo motor comprises: the cylindrical portions may that is formed on the anti-driving side of casing one end place;
One printed circuit board (PCB) has electric-conductor on its inboard, is secured to the outer end of described cylindrical portions may, thereby constitutes the complete closed state;
One rotational position detection device is received within by among described cylindrical portions may and the formed inner chamber of described printed circuit board (PCB); And
A connector spare, perhaps male end or female end are connected with described printed circuit board (PCB), wherein
One outer cover of described interface unit is secured to the outside of described printed circuit board (PCB);
The electric-conductor of described interface unit connects and is fixed in the electric-conductor of described printed circuit board (PCB) by a window of described printed circuit board (PCB); And
Window is stated in described outside housing cover residence.
15, a servo motor comprises:
One encoder cover plate has a base plate, is installed in the anti-driving side one end place of casing;
One printed circuit board (PCB) and a rotational position detection device are received among the inner chamber of described encoder cover plate; And
A connector spare, or male end or female end are connected with described printed circuit board (PCB), wherein
One outer cover of described interface unit is installed on the described printed circuit board (PCB);
The electric-conductor of described interface unit connects and is fixed in the electric-conductor of described printed circuit board (PCB);
A kerf formula window is opened in the internal end surface place of described encoder cover plate; And
The outer cover of described interface unit passes the described notch-cut type window that has a liner.
16, a servo motor comprises:
One encoder cover plate has a base plate, is installed in the anti-driving side one end place of casing;
One printed circuit board (PCB) and a rotational position detection device are received among the inner chamber of described encoder cover plate; And
A connector spare, or male end or female end are connected with described printed circuit board (PCB); Wherein
One outer cover of described interface unit is installed on the described printed circuit board (PCB);
The electric-conductor of described interface unit connects and is fixed in the electric-conductor of described printed circuit board (PCB);
One window is offered to such an extent that pass described encoder cover plate; And
One outer cover of another interface unit passes the described window that has a liner.
CN95102890A 1994-03-14 1995-03-14 Servomotor Pending CN1113358A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP4165094A JPH07255148A (en) 1994-03-14 1994-03-14 Servo motor
JP41650/94 1994-03-14
JP54263/94 1994-03-25
JP6054263A JPH07298555A (en) 1994-02-18 1994-03-25 Servomotor

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CN (1) CN1113358A (en)
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