CN2390566Y

CN2390566Y - Improved bench type dental boring machine

Info

Publication number: CN2390566Y
Application number: CN 99221629
Authority: CN
Inventors: 杨守成
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-13
Filing date: 1999-07-13
Publication date: 2000-08-09
Anticipated expiration: 2009-07-13

Abstract

The utility model relates to a bench type dental drill, which is characterized in that soft shafts are arranged from a motor to a straight handpiece; a core shaft is a whole shaft and is shorter than an outer sleeve; the middle part of the core shaft is sheathed with two bearings which are matched with the clearance of the outer sleeve; the back part has inner threads; the middle part of a top rod has outer threads; the top rod is penetrated in the core shaft from the back end of an inner cavity of the core shaft, and is screwed with the core shaft for causing the front end of the top rod to be in contact with a clamping spring seat; the back part of the top rod is arranged in the outer sleeve; the outer sleeve is provided with two opposite notches which are used for rotating the top rod; the front end and the back end of a steel wire soft shaft in the soft shaft are respectively connected with the back end of the top rod and a motor shaft; the front end and the back end of a soft pipe in the soft shaft are respectively connected with the outer sleeve and the motor. The utility model has the advantages of smooth power transfer, low failure rate, and good performance.

Description

Improved desk type dental drill engine

This utility model relates to a kind of dentistry drilling machine, particularly a kind of improved desk type dental drill engine.

The K90-1 type desk type dental drill engine that Shanghai Dental Medical Apparatus and Instrument Factory produces is the dentistry drilling machine that generally uses at present, mainly constitute by motor, three curved booms, machine rope, straight handpiece, the straight handpiece rotating speed is 3000-25000r/min, three curved boom complex structures, comprise 50 surplus a part; The critical piece of straight handpiece comprises overcoat, axle epimere, axle hypomere, push rod, axle sleeve, and its concrete structure can be consulted the related content among the 207th page to the 209th page of " oral medicine " (ISBN 7-117-00212-3/R213) of publishing the People's Health Publisher.Because this machine adopts three curved booms and machine rope to transmit motor power, the machine rope was regulated pine makes straight handpiece fast phenomenon occur losing, tension then can burn out motor, desire is regulated the tightness of machine rope to optimum state and the lasting quite difficulty that keeps, therefore, the above-mentioned kind of drive causes motor power can't stablize, balancedly pass to straight handpiece; In addition, because directly socket between axle hypomere and overcoat, axle epimere and the axle sleeve produces violent friction between any two in the operation process of dental drill machine, straight handpiece is turned round in short-term after i.e. heating or generation noise, cause straight handpiece to go wrong frequently, have a strong impact on clinical treatment continue carry out.In sum, existing desk type dental drill engine exist transmission of power not steadily, the defective of high, the poor performance of fault rate.

The purpose of this utility model is to provide that a kind of transmission of power is steady, fault rate is low, the desk type dental drill engine of function admirable.

The purpose of this utility model is achieved through the following technical solutions:

The desk type dental drill engine that this utility model provides, comprise motor 13, straight handpiece, straight handpiece comprises belled successively overcoat 1, hollow mandrel 3, push rod 5, the inner chamber front portion of axle 3 is equipped with three lobe springs 19 and folder spring abutment 18 successively, its construction features is: motor 13 is to being provided with the flexible axle that is used for transmitting motor power between straight handpiece, axle 3 is bearing and the length length less than overcoat 1, two bearings 4 of the middle part suit of axle 3 and overcoat 1 matched in clearance, its rear portion is shaped on female thread, the middle part of push rod 5 is shaped on the external screw thread that can be complementary with axle 3 female threads, push rod 5 pierces in the axle 3 and spins with axle 3 and its front end is contacted with folder spring abutment 18 from the intracavity posterior end of axle 3, the rear portion of push rod 5 places in the overcoat 1, overcoat 1 is having two relative notch 1a corresponding to axle 3 rear portions and push rod 5 center, the front end of Bowden cable 14 in the flexible axle, the rear end respectively with the rear end of push rod 5, motor shaft 13b links, the front end of flexible pipe 9 in the flexible axle, the rear end respectively with overcoat 1, motor 13 links.

Straight handpiece can be used to apparatus such as clamping contra-angle handpiece, car pin, Shi Jian, and surgeon dentist screws push rod 5 by two notch 1a, allows push rod 5 front ends closely contact with folder spring abutment 18, so that apparatus such as contra-angle handpiece, car pin or Shi Jian are securely held on straight handpiece.

By above technical scheme as seen, motor 13 is to being provided with the flexible axle that is used for transmitting motor power between straight handpiece, the length of axle 3 is less than the length of overcoat 1, push rod 5 spins with axle 3 and its front end contacts with folder spring abutment 18, the rear portion of push rod 5 places in the overcoat 1, have on the overcoat 1 and be used for two notch 1a of turn push rod 5, the front end of Bowden cable 14 in the flexible axle, the rear end respectively with the rear end of push rod 5, motor shaft 13b links, the front end of flexible pipe 9 in the flexible axle, the rear end respectively with overcoat 1, motor 13 links, like this, the power of motor 13 just can be passed to axle 3 and be made straight handpiece work by Bowden cable 14, straight handpiece palpus dependence three curved booms and machine rope that this measure had both changed in the existing desk type dental drill engine transmit the traditional approach of motor power ability work, guaranteed that again motor power can stablize, balancedly pass to straight handpiece, transmission of power is quite steady; In addition, axle 3 is a bearing, two bearings 4 of its middle part suit and overcoat 1 matched in clearance, avoided directly contact between axle 3, the overcoat 1, can not produce violent friction between axle 3, the overcoat 1 in the operation process of dental drill machine, straight handpiece turns round in short-term promptly to generate heat or produce noise phenomenon and has not existed, cause the service life and the maintenance time of straight handpiece to be prolonged greatly at interval, in other words, this dental drill machine can run well for a long time, thus fully guaranteed clinical treatment continue carry out.In sum, this dental drill machine compared with prior art exists that transmission of power is steady, fault rate is low, the advantage of function admirable.

Description of drawings:

Fig. 1 is the structural representation of this utility model embodiment;

Fig. 2 is the A-A cutaway view of Fig. 1.

By the following examples and accompanying drawing the utility model is described in further detail:

Referring to Fig. 1, Fig. 2:

This desk type dental drill engine mainly is to be made of the motor 13, flexible axle, the straight handpiece that connect successively;

Motor 13 is outer have can with the hollow round platform 13a of motor shaft 13b coaxial line, affixed inside has the flexible shaft end 13c of square counterbore on the termination of motor shaft 13b, the dead in line of the centrage of described square counterbore and motor shaft 13b, the termination of motor shaft 13b and flexible shaft end 13c all are positioned at hollow round platform 13a;

Flexible axle is by flexible pipe 9, Bowden cable 14, hose coupling 7, hose coupling 11, spring 8, spring 10, nut 6, nut 12, stop 15 compositions of circle, Bowden cable 14 places in the flexible pipe 9 and its front end, the cross section of follower head is square, hose coupling 7, hose coupling 11 respectively with the front end of flexible pipe 9, the rear end is affixed, play the spring 8 of protection flexible pipe 9 effects, spring 10 is set in flexible pipe 9 and hose coupling 7, the connection place of hose coupling 11, nut 6, nut 12 is set in hose coupling 7, on the hose coupling 11, stop that circle 15 is installed in the anterior of Bowden cable 14 and leans with round platform 7a in the hose coupling 7;

Straight handpiece mainly comprises belled successively overcoat 1, hollow mandrel 3, push rod 5, axle 3 is bearing and the length length less than overcoat 1, the middle part of axle 3 is the bearing 4 of suit and overcoat 1 matched in clearance successively, back-up ring 17, bearing 4, its rear portion is shaped on female thread, the rear end is provided with turn-knob 3a, the inner chamber front portion of axle 3 is equipped with three lobe springs 19 and folder spring abutment 18 successively, the external screw thread that the middle part of push rod 5 is provided with turn-knob 5a successively and can be complementary with axle 3 female threads, push rod 5 pierces in the axle 3 and spins with axle 3 and its front end is contacted with folder spring abutment 18 from the intracavity posterior end of axle 3, the rear portion of push rod 5 places in the overcoat 1, the rear end of push rod 5 has square counterbore 5b vertically, the dead in line of the centrage of square counterbore 5b and push rod 5, overcoat 1 is having two relative oval shape notch 1a corresponding to axle 3 rear portions and push rod 5 center, the front portion of overcoat 1 is provided with contra-angle handpiece hold-down screw 2, and the rear portion of overcoat 1 is shaped on external screw thread;

Peg graft with push rod 5 rear ends, flexible shaft end 13c respectively in the front end of Bowden cable 14, rear end, after the annular end face 1b of the annular end face 7b of hose coupling 7 and overcoat 1 rear end reclines, nut 6 spins with overcoat 1, after the annular end face 11a of hose coupling 11 and the annular end face 13a ' of hollow round platform 13a reclined, nut 12 spun with hollow round platform 13a;

Also be with the protective sleeve 16 that can cover two notch 1a on the overcoat 1.

Claims

1, improved desk type dental drill engine, it comprises motor (13), straight handpiece, straight handpiece comprises belled successively overcoat (1), hollow mandrel (3), push rod (5), the inner chamber front portion of axle (3) is equipped with three lobe springs (19) and folder spring abutment (18) successively, it is characterized in that: motor (13) is to being provided with the flexible axle that is used for transmitting motor power between straight handpiece, axle (3) is bearing and the length length less than overcoat (1), two bearings (4) of the middle part suit of axle (3) and overcoat (1) matched in clearance, its rear portion is shaped on female thread, the middle part of push rod (5) is shaped on the external screw thread that can be complementary with axle (3) female thread, push rod (5) pierces in the axle (3) and spins with axle (3) and its front end is contacted with folder spring abutment (18) from the intracavity posterior end of axle (3), the rear portion of push rod (5) places in the overcoat (1), overcoat (1) is having relative two notches (1a) corresponding to axle (3) rear portion with push rod (5) center, the front end of Bowden cable in the flexible axle (14), the rear end respectively with the rear end of push rod (5), motor shaft (13b) links, the front end of flexible pipe in the flexible axle (9), the rear end respectively with overcoat (1), motor (13) links.

2, desk type dental drill engine according to claim 1, it is characterized in that: the middle part of the rear end of axle (3) and push rod (5) is respectively equipped with turn-knob (3a), turn-knob (5a), notch (1a) be shaped as oval shape, the rear end of push rod (5) has square counterbore (5b) vertically, the dead in line of the centrage of square counterbore (5b) and push rod (5), the rear portion of overcoat (1) is shaped on external screw thread, the front end of flexible pipe (9), the rear end is installed with hose coupling (7) respectively, hose coupling (11), hose coupling (7), be with nut (6) on the hose coupling (11) respectively, nut (12), Bowden cable (14) front end, the cross section of follower head is square, motor (13) is outer have can with the hollow round platform (13a) of motor shaft (13b) coaxial line, affixed inside has the flexible shaft end (13c) of square counterbore on the termination of motor shaft (13b), the dead in line of the centrage of described square counterbore and motor shaft (13b), the termination of motor shaft (13b) and flexible shaft end (13c) all are positioned at hollow round platform (13a), the front end of Bowden cable (14), the rear end respectively with push rod (5) rear end, flexible shaft end (13c) is pegged graft, after the annular end face (1b) of the annular end face (7b) of hose coupling (7) and overcoat (1) rear end reclines, nut (6) spins with overcoat (1), after the annular end face (11a) of hose coupling (11) reclined with the annular end face (13a ') of hollow round platform (13a), nut (12) spun with hollow round platform (13a).

3, desk type dental drill engine according to claim 1 and 2 is characterized in that: also be with the protective sleeve (16) that can cover two notches (1a) on the overcoat (1).