CN2849058Y

CN2849058Y - Mechanic puzzle lock core

Info

Publication number: CN2849058Y
Application number: CN 200620055356
Authority: CN
Inventors: 刘振林
Original assignee: 叶细轩
Current assignee: Liu Zhenlin
Priority date: 2006-02-27
Filing date: 2006-02-27
Publication date: 2006-12-20
Anticipated expiration: 2016-02-27

Abstract

The utility model relates to a mechanical cipher lock core. A rotor core (21) and rotor teeth (12) are arranged on a cipher seat (31). Lockset unlocking teeth and a fixing hole of encoding teeth are arranged on the rotor core (21). Encoding teeth (14) are arranged on the fixing hole of the encoding teeth corresponding to the arranged encoding. A disk spring (13) of the rotor teeth is connected between the rotor teeth (12) and the cipher seat (31). A clamping head (35) of the rotor teeth on an identifying frame (27) is clamped on a teeth space slot of the rotor teeth (12). An identifying sheet (23) is hinged on the identifying frame (27). The rotor core (21) is fixedly connected with the torsional moment of a rotor coaxial shaft (20). The rotor teeth (12) are arranged on the rotor coaxial shaft (20). The lower end of a press-key pushing board (1) is provided with a pressing block (36) of the encoding teeth and a pressing block (37) of the identifying sheet. The lockset unlocking teeth are connected with a lockset unlocking mechanism. The mechanical cipher lock core of the utility model has the advantages of great cipher amount, high confidentiality and reliable motion.

Description

Mechanical cipher lock cylinder

Technical field

The utility model relates to the close control device of a kind of machinery, particularly a kind of mechanical cipher lock cylinder.

Background technology

Mechanical cipher lock cylinder is mainly used in lock as the control movement of a kind of confidentiality equipment or lockset, relative common lock, and it has easy to operate, the characteristics of good anti-theft effect.Since adopt specific structure function between parts and the parts, not electricity consumption, thus more high temperature resistant, less affected by environment, can play good antitheft secret effect.But, present mechanical cipher lock cylinder, all coding sites all are provided with in one plane, because the restriction of frame for movement, unless be provided with the lock core volume very big, otherwise be difficult to set more password combination, like this, just caused password relatively easily to crack or the cost of lockset is too high and the problem of the bad arrangement in space.

The utility model content

The purpose of this utility model is, overcomes above-mentioned the deficiencies in the prior art, provides a kind of volume can be less, and the lock core of the more mechanical code lock of code combination.

For achieving the above object, the technical solution adopted in the utility model is: mechanical cipher lock cylinder comprises the password seat, but columned rotor core coaxial, transfer torque each other and rotor tooth is housed on the password seat; Described rotor core is provided with lockset and opens tooth and the sign indicating number of many schedulings longitudinally tooth fixing hole, and on the coding respective coding tooth fixing hole of setting the coding tooth is housed; Described lockset is opened tooth and the lockset opening mechanism links; One of rotor tooth disc spring is fixed on the rotor tooth, and the other end is fixed on the password seat; Be hinged with the identification frame on the password seat, under the effect of identification frame torsion spring to the identification frame, the rotor tooth dop on the identification frame is stuck on the rotor tooth inter-tooth slots banking; Described password seat is provided with a plurality of button push pedals corresponding respectively with the lockset password key, and described button push pedal lower end one side can be pressed onto respective coding tooth on the rotor core, and opposite side can be pressed onto the identification frame and be provided with button push pedal return between the two dodges mechanism.

The utility model utilizes the main body of the periphery of rotor core as the regular coding tooth, under the kindred circumstances, than utilizing the plane to save the space greatly merely, thereby can set more coded combination, increases confidentiality and safety.

As to further improvement in the technical proposal, technical scheme is as follows.

Above-mentioned mechanical cipher lock cylinder, described rotor core is fixedlyed connected with rotor concentric shafts moment of torsion, and the rotor concentric shafts is fixedly set in the rotor tooth concentric shafts, and rotor tooth slides on the rotor concentric shafts; Can carry out a certain amount of relatively rotating between rotor concentric shafts and the rotor tooth, one of rotor core torsion spring is fixed on the rotor concentric shafts, and the other end is fixed on the rotor tooth, and the lower end of described button push pedal is provided with the coding tooth pressure piece that can be pressed onto the coding tooth.

Above-mentioned mechanical cipher lock cylinder, the button push pedal return between described button push pedal and the identification frame is dodged mechanism and is, is hinged with the identification sheet on the described identification frame, is provided with identification sheet torsion spring between identification sheet and the identification frame; Described button push pedal lower end is provided with the identification sheet briquetting that can be pressed onto the identification sheet.

Above-mentioned mechanical cipher lock cylinder, described password seat is provided with rotor core original position bumping post, and described rotor tooth is provided with the rotor core original position backing pin that can cooperate with rotor core original position bumping post; Described identification frame and rotor core reset to link up with and fixedly link, hinge is associated with its rotor core drag hook and rotor core restoring lever that hook cooperates and link to each other with reset operation mechanism on the lockset that resets that resets on the described password seat, is provided with the restoring lever torsion spring between password seat and the restoring lever.

Above-mentioned mechanical cipher lock cylinder, described lockset opening mechanism be, on the described password seat with rotor core on lockset open corresponding position, tooth position and be provided with the unlatching lever that is subjected to lockset open operation mechanism controls, password seat and open to be provided with between the lever and open the lever torsion spring.

Above-mentioned mechanical cipher lock cylinder, described rotor core is contained on the frame of loosing core by the bearing on the frame axle of loosing core, and the other end can be connected with the rotor concentric shafts with extracting out, described rotor core is provided with the tooth of loosing core, the unlatching lever shaft of loosing core is housed on the password seat, loose core to open on the lever shaft and be provided with the unlatching lever of loosing core with the corresponding position, tooth position of loosing core, be provided with the lever torsion spring of loosing core loosing core to open between lever and the password seat, loose core open also be fixed with on the lever with the frame of loosing core on the frame latch hook of loosing core that the frame location hook matches of loosing core, be provided with the spring of loosing core between described rotor core and the rotor concentric shafts; The password seat is provided with available end and lifts the unlatching lever of loosing core, the shell fragment of loosing core that its end can be depressed again after the rotor core insertion puts in place.

Above-mentioned mechanical cipher lock cylinder is fixed with guided way on the password seat, guiding block fixing on the frame of loosing core is inserted in the guided way.

Above-mentioned mechanical cipher lock cylinder, rotor core are provided with 10 scheduling sign indicating number tooth fixing holes longitudinally, and every scheduling sign indicating number tooth fixing hole has 11.

Above-mentioned mechanical cipher lock cylinder, identification sheet briquetting has outward-dipping from down to up inclined-plane in the described button push pedal, and the side of coding tooth pressure piece has intilted from down to up inclined-plane.

Above-mentioned mechanical cipher lock cylinder, the described frame of loosing core is provided with rotor core zero-bit locating piece, and rotor core is provided with the zero setting tooth that cooperates with rotor core zero-bit locating piece.

Description of drawings

This Figure of description 1 is the partial sectional view of a kind of embodiment mechanical cipher lock cylinder of the utility model; Fig. 2 is the structure chart of wherein rotor core, rotor tooth and axial region thereof; Fig. 3 is its another partial sectional view; Fig. 4 is the matching relationship schematic diagram with rotor tooth and rotor concentric shafts relevant portion; Fig. 5 for the structure chart of the relevant portion of loosing core; Fig. 6 is the structure chart with rotor core homing relevant portion; Fig. 7 for the reset structural representation of relevant portion of rotor core; Fig. 8 is another structural representation with the relevant portion of loosing core; Fig. 9 is the lateral view of button push pedal.

In Fig. 1 to 9, the 1st, the button push pedal, the 2nd, by key spring, the 6th, the unlatching lever of loosing core, the 7th, the unlatching lever shaft of loosing core, the 8th, the lever torsion spring of loosing core, the 12nd, rotor tooth, the 13rd, rotor tooth disc spring, the 14th, coding tooth, the 15th, the frame axle of loosing core, the 16th, the frame of loosing core, the 18th, guided way, the 19th, rotor tooth concentric shafts, the 20th, rotor concentric shafts, the 21st, rotor core, the 22nd, rotor core torsion spring, the 23rd, identification sheet, the 24th, identification sheet torsion spring, the 25th, restoring lever, the 26th, restoring lever torsion spring, the 27th, identification frame, the 28th, identification frame torsion spring, the 29th, open lever, the 30th, open the lever torsion spring, the 31st, password seat, the 33rd, the spring of loosing core, the 35th, rotor tooth dop, the 36th, coding tooth pressure piece, the 37th, identification sheet briquetting, 38 dodge bearing pin for rotor tooth, 39 is the circumferential elongated slot of rotor tooth, the 41st, and the rotor core hook that resets, the 42nd, the rotor core drag hook that resets, the 43rd, the frame location hook of loosing core, the 44th, the frame latch hook of loosing core, the 45th, the shell fragment of loosing core, the 46th, rotor core original position bumping post, the 47th, rotor core original position backing pin, the 48th, guiding block, the 49th, bearing pin, the 50th, bearing pin jack.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described in detail.

In the mechanical cipher lock cylinder shown in the accompanying drawing 1 to 9, but columned rotor core 21 coaxial, transfer torque each other and rotor tooth 12 are housed on password seat 31; Described rotor core 21 is provided with lockset and opens tooth (lockset is opened tooth and can be contained on the hole of a plurality of fixing holes) and the sign indicating number of many schedulings longitudinally tooth fixing hole, and the tooth 14 of encoding is housed on the coding respective coding tooth fixing hole of setting.Rotor core 21 is provided with 10 scheduling sign indicating number tooth fixing holes longitudinally, and every scheduling sign indicating number tooth fixing hole has 11.13 1 of rotor tooth disc springs are fixed on the rotor tooth 12, and the other end is fixed on the password seat 31.Be hinged with identification frame 27 on password seat 31, under the effect of 28 pairs of identification of identification frame torsion spring frame 27, the rotor tooth dop 35 on the identification frame 27 is stuck on rotor tooth 12 inter-tooth slots banking.It (is that bearing pin 49 fixing on the rotor concentric shafts 20 inserts in the bearing pin jack 50 of rotor core 21 from the end of rotor core 21 here that described rotor core 21 is fixedlyed connected with rotor concentric shafts 20 moments of torsion, and rotor core 21 can axially be deviate from the rotor concentric shafts), rotor concentric shafts 20 is fixedly set in rotor tooth concentric shafts 19, and rotor tooth 12 is installed on the rotor concentric shafts 20 by bearing.Described password seat 31 is provided with a plurality of button push pedals 1 corresponding respectively with the lockset password key.

Open tooth with described lockset and be associated with the lockset opening mechanism mutually: on the described password seat 31 with rotor core 21 on lockset open corresponding position, tooth position and be provided with the unlatching lever 29 that is subjected to lockset open operation mechanism controls, password seat 31 and open to be provided with between the lever 29 and open lever torsion spring 28.The reset operation mechanism part here can only be a manual stay cord also, or the mechanism that triggered by door handle, button etc.

The lower end of described button push pedal 1 is provided with the coding tooth pressure piece 36 that can be pressed onto the coding tooth, and the side of coding tooth pressure piece 36 has intilted from down to up inclined-plane; The effect of coding tooth pressure piece 36 is, when continuous repeated encoding, gives second coding tooth 14 slot milling; The effect of coding tooth pressure piece 36 ramps is that make easier the finishing of relative motion of button push pedal 1 and coding tooth 14, mechanism's work is more reliable.

Can carry out a certain amount of relatively rotating between described rotor concentric shafts 20 and the rotor tooth 12, the structure that can a certain amount ofly relatively rotate here is that the rotor tooth of fixing on the rotor concentric shafts 20 is dodged bearing pin 38 and is inserted in the circumferential elongated slot 39 or circumferential slotted hole of rotor tooth 12; 22 1 of rotor core torsion springs are fixed on the rotor concentric shafts 20, and the other end is fixed on the rotor tooth 12; This structure makes under the continuous situation of repeated encoding, after previous coding tooth 14 is depressed in button push pedal 1 again during return, back coding tooth 14 can be dodged, and after button push pedal 1 playback, rotor core 21 and on coding tooth 14 can under the effect of rotor core torsion spring 22, reset again; As long as thereby certain relative rotation reaches dodging of coding 14 pairs of button push pedals 1 of tooth between rotor concentric shafts 20 and the rotor tooth 12; So just make this lock core can repeat coding, thereby also increased number of code combinations of the present utility model.

Be hinged with identification sheet 23 on the described identification frame 27, be provided with identification sheet torsion spring 24 between identification sheet 23 and the identification frame 27, described button push pedal 1 lower end is provided with the identification sheet briquetting 37 that can be pressed onto identification sheet 23, and identification sheet briquetting 37 has outward-dipping from down to up inclined-plane.Button push pedal return between so-called button push pedal 1 that Here it is and the identification frame 27 is dodged mechanism, and the effect of wherein discerning sheet briquetting 37 ramps is, makes button push pedal and easier the finishing of identification sheet relative motion, and mechanism's work is more reliable.This button push pedal return dodge mechanism also can for, at the spring-supported briquetting on retractible band inclined-plane during at button push pedal 1 return of being subjected to of being provided with of button push pedal 1 time.

Be provided with rotor core original position bumping post 46 on the guided way 18 that is fixed in password seat 31, described rotor tooth 12 is provided with the rotor core original position backing pin 47 that can cooperate with rotor core original position bumping post 46; This part mechanism can guarantee that rotor tooth 12 and rotor core 21 playback and can carry out the tram of open operation when lockset locks.

Described identification frame 27 and the rotor core hook 41 fixedly link (be here rotor core reset hook 41 be fixed in the rotating shaft of discerning frame 27) that resets, on the described password seat 31 hinge be associated with its upper rotor part core reset that drag hook 42 and rotor core reset that hook 41 cooperates and with lockset on reset operation mechanism (can be special button, stay cord or with lockset on the mechanism that links of other mechanisms) restoring lever 25 that links to each other, be provided with restoring lever torsion spring 26 between password seat 31 and the restoring lever 25.This part structure can guarantee that lockset opening rear lock core return again, promptly locks again.

Described rotor core 21 is contained on the frame 16 of loosing core by the bearing on the frame axle 15 of loosing core, described rotor core 21 is provided with the tooth of loosing core (tooth of loosing core can be contained on the hole of a plurality of fixing holes), being equipped with on password seat 31 looses core opens lever shaft 7, loose core to open on the lever shaft 7 and be provided with the unlatching lever 6 of loosing core with the corresponding position, tooth position of loosing core, be provided with the lever torsion spring 8 of loosing core loosing core to open between lever 6 and the password seat 31, loose core open also be fixed with on the lever 6 with the frame 16 of loosing core on the frame latch hook 44 of loosing core that frame location hook 43 matches of loosing core, be provided with the spring 33 of loosing core between described rotor core 21 and the rotor concentric shafts 20.Password seat 31 is provided with available end and lifts to loose core and open lever 6 (rotor core 21 is extracted the back out), when rotor core 21 insert put in place after the shell fragment 45 of loosing core that can be depressed by the guiding block 48 on the frame 16 of loosing core again of its end.

Help the loose core guided way 18 of frame 16 of accurate Fast Installation being fixed in to be fixed with on the password seat 31, guiding block 48 fixing on the frame 16 of loosing core is inserted in the guided way 18.The described frame 16 of loosing core is provided with rotor core zero-bit locating piece, and rotor core 21 is provided with the rotor core zero setting tooth that cooperates with rotor core zero-bit locating piece.This part structure can make rotor core 21 be drawn out of and insert again behind the change password setting.

This mechanical cipher lock cylinder course of work is described below.

When promoting numerical key drive button push pedal 1 decline, the coding tooth pressure piece 36 in the button push pedal 1 (according to correct password on time) will touch coding tooth 14, drives rotor core 21 and rotor tooth 12 and together turns over an angle; Identification sheet briquetting 37 is pressed onto identification sheet 23 simultaneously in the button push pedal 1, and identification sheet 23 is pressed onto identification frame 27 again, makes identification frame 27 turn over an angle, the restriction that identification frame 27 upper rotor part tooth dops 35 are freed rotor tooth 12; Button push pedal 1 continues to descend, identification sheet 23 is pressed because of the 27 rotation slippages laterally of identification frame break away from, under identification frame torsion spring 28 and identification sheet torsion spring 24 act on respectively, identification sheet 23, identification frame 27 homings, the rotor tooth dop 35 of identification frame 27 has been stuck on the next inter-tooth slots of rotor tooth 12.When the pressure of freeing button push pedal 1, button push pedal 1 is replied rapidly under by the effect of key spring 2 and is put in place; In the reseting procedure, identification sheet 23 can reverse around its rotating shaft, thereby steps down for the identification sheet briquetting 37 of button push pedal, then homing under the effect of identification sheet torsion spring 24.So according to correct password repeat key, when press last key letter, the lockset on the rotor core 21 is opened tooth spiral and is forwarded the position to, make to open lever 29 rotations, thereby but the door-opening mechanism operate as normal that links to each other with the unlatching lever door is opened.After door is opened, lockset open operation mechanism work (artificially or with other structures linking), restoring lever 25 contacted with it is touched, the restoring lever 25 upper rotor part cores drag hook 42 that resets drives the rotor core of identification on the frame 27 hook 41 that resets immediately, so rotor tooth dop 35 is freed the control to rotor tooth 12, rotor tooth 12 is homing under the effect of rotor tooth disc spring 13, and drives rotor core 21 homings by rotor concentric shafts 20.When the continuous password of setting repeats, when resetting again after button push pedal 1 is pressed, its password tooth pressure piece 36 can contact second coding tooth 14, the tooth 14 of encoding this moment drives rotor core 21 with respect to angle of rotor tooth 12 counter-rotatings, to dodge the coding tooth pressure piece 36 of button push pedal 1, after button push pedal 1 rising puts in place, under the effect of rotor core torsion spring 22, coding tooth 14 is with rotor core 21 resiles, so that promote coding tooth 14 next time.When coded lock is opened in other people attempt, when the numerical key password is pressed mistake, coding tooth pressure piece 36 is by touching less than coding tooth 14 in the button push pedal 1, but identification sheet briquetting 37 can touch identification sheet 23 on it, thereby drive the restriction that identification frame 27 upper rotor part tooth dops 35 are freed rotor tooth 12, rotor tooth 12 drives rotor core 21 and together is returned to initial position under the effect of rotor tooth disc spring 13, no matter and by right several encoding.

When needs change unlocking cipher group, press numerical key according to the password of correctly loosing core, its operating principle with unblank identical, just when having pressed last password, the tooth and hair of loosing core on the rotor core 21 is waved effect, the unlatching lever 6 of will loosing core turns an angle, and looses core to open frame location hook 43 disengagements of loosing core on loose core on the lever 6 the frame latch hook 44 and the frame 16 of loosing core, and the frame 16 of loosing core ejects under the effect of the spring 33 of loosing core.Take off loose core frame 16 and rotor core 21 with hand, unload coding tooth 14 on the rotor core 21, contrast button number and figure place then and number determine new code set with instrument, with new code set respective coding tooth fixing hole on regular coding tooth 14.The unlocking cipher figure place and the password figure place of loosing core all are adjustable, can set 1 to 11, and setting figure place does not need to adjust the position that lockset is opened tooth simultaneously.After the adjustment rotor core 21 and the frame 16 of loosing core packed on the password seat, the Shi Yingxian that packs into will come on the rotor core zero-bit locating piece with rotor core zero setting tooth.

The reason of changing the cipher code set of loosing core is similar to change unlocking cipher group.

The utility model mechanical cipher lock cylinder number of password is especially big, strong security, simple in structure, reliable in action.

Claims

1. a mechanical cipher lock cylinder comprises password seat (31), it is characterized in that: at password seat (31) but on columned rotor core coaxial, transfer torque each other (21) and rotor tooth (12) are housed; Described rotor core (21) is provided with lockset and opens tooth and the sign indicating number of many schedulings longitudinally tooth fixing hole, and the tooth (14) of encoding is housed on the coding respective coding tooth fixing hole of setting; Described lockset is opened tooth and the lockset opening mechanism links; (13) one of rotor tooth disc springs are fixed on the rotor tooth (12), and the other end is fixed on the password seat (31); Be hinged with identification frame (27) on password seat (31), under the effect of identification frame torsion spring (28) to identification frame (27), the rotor tooth dop (35) on the identification frame (27) is stuck on rotor tooth (12) inter-tooth slots banking; Described password seat (31) is provided with a plurality of button push pedals (1) corresponding respectively with the lockset password key, described button push pedal (1) lower end one side can be pressed onto rotor core (21) and go up respective coding tooth (14), and opposite side can be pressed onto identification frame (27) and be provided with button push pedal return between the two dodges mechanism.

2. mechanical cipher lock cylinder as claimed in claim 1, it is characterized in that: described rotor core (21) is fixedlyed connected with rotor concentric shafts (20) moment of torsion, rotor concentric shafts (20) is fixedly set in rotor tooth concentric shafts (19), and rotor tooth (12) slides on the rotor concentric shafts (20); Can carry out a certain amount of relatively rotating between rotor concentric shafts (20) and the rotor tooth (12), (22) one of rotor core torsion springs are fixed on the rotor concentric shafts (20), the other end is fixed on the rotor tooth (12), and the lower end of described button push pedal (1) is provided with the coding tooth pressure piece (36) that can be pressed onto the coding tooth.

3. mechanical cipher lock cylinder as claimed in claim 1 or 2, it is characterized in that: the button push pedal return between described button push pedal (1) and the identification frame (27) is dodged mechanism and is, be hinged with identification sheet (23) on the described identification frame (27), be provided with identification sheet torsion spring (24) between identification sheet (23) and the identification frame (27); Described button push pedal (1) lower end is provided with the identification sheet briquetting (37) that can be pressed onto identification sheet (23).

4. mechanical cipher lock cylinder as claimed in claim 1 or 2 is characterized in that: described password seat (31) is provided with rotor core original position bumping post (46), and described rotor tooth (12) is provided with the rotor core original position backing pin (47) that can cooperate with rotor core original position bumping post (46); Described identification frame (27) and the rotor core hook (41) that resets fixedly links, described password seat (31) is gone up hinge and is associated with its upper rotor part core reset drag hook (42) and the restoring lever (25) that rotor core resets hook (41) cooperation and links to each other with reset operation mechanism on the lockset, is provided with restoring lever torsion spring (26) between password seat (31) and the restoring lever (25).

5. mechanical cipher lock cylinder as claimed in claim 1, it is characterized in that: described lockset opening mechanism is, go up at described password seat (31) and to go up lockset with rotor core (21) and open corresponding position, tooth position and be provided with the unlatching lever (29) that is subjected to lockset open operation mechanism controls, be provided with unlatching lever torsion spring (28) between password seat (31) and the unlatching lever (29).

6. mechanical cipher lock cylinder as claimed in claim 1 or 2, it is characterized in that: described rotor core (21) is contained on the frame of loosing core (16) by the bearing on the frame axle (15) of loosing core, and the other end can be connected with rotor concentric shafts (20) with extracting out, described rotor core (21) is provided with the tooth of loosing core, being equipped with on password seat (31) looses core opens lever shaft (7), the unlatching lever shaft (7) of loosing core is gone up with the corresponding position, tooth position of loosing core and is provided with the unlatching lever (6) of loosing core, be provided with the lever torsion spring (8) of loosing core loosing core to open between lever (6) and the password seat (31), loose core open also be fixed with on the lever (6) with the frame of loosing core (16) on the frame latch hook (44) of loosing core that frame location hook (43) matches of loosing core, be provided with the spring of loosing core (33) between described rotor core (21) and the rotor concentric shafts (20); Password seat (31) is provided with available end and lifts the unlatching lever (6) of loosing core, the shell fragment of loosing core (45) that its end can be depressed again after rotor core (21) insertion puts in place.

7. mechanical cipher lock cylinder as claimed in claim 3 is characterized in that: be fixed with guided way (18) on password seat (31), the frame of loosing core (16) is gone up fixing guiding block (48) and is inserted in the guided way (18).

8. mechanical cipher lock cylinder as claimed in claim 1 or 2 is characterized in that: rotor core (21) is provided with 10 scheduling sign indicating number tooth fixing holes longitudinally, and every scheduling sign indicating number tooth fixing hole has 11.

9. mechanical cipher lock cylinder as claimed in claim 1 or 2 is characterized in that: described button push pedal (1) is gone up identification sheet briquetting (37) and is had outward-dipping from down to up inclined-plane, and the side of coding tooth pressure piece (36) has intilted from down to up inclined-plane.

10. mechanical cipher lock cylinder as claimed in claim 6 is characterized in that: the described frame of loosing core (16) is provided with rotor core zero-bit locating piece, and rotor core (21) is provided with the rotor core zero setting tooth that cooperates with rotor core zero-bit locating piece.