CN101347935A

CN101347935A - High speed handpiece

Info

Publication number: CN101347935A
Application number: CNA2008100541492A
Authority: CN
Inventors: 马凤敏
Original assignee: Individual
Current assignee: Tianjin Haide Haotian Industry & Trade Co Ltd
Priority date: 2008-08-15
Filing date: 2008-08-15
Publication date: 2009-01-21
Anticipated expiration: 2028-08-15
Also published as: CN101347935B

Abstract

The invention relates to a high-speed machine head of which the outer housing is in shape of an eccentric cylinder; wherein, a clutch is fixed at the eccentric position; a circular through hole is arranged in the outer housing of the machine head; the internal thread, arranged at the left side of the outer housing of the machine head, is used for fixing the drive shaft; a small belt roller and a friction plate A are respectively fixed at the inner end and the outer end of the outer housing of the machine head; a lug boss which is reversely threaded outside is arranged at the right side of the outer housing of the machine head, and a main shaft component which is fixed on a pull rod for clutch extends into the right side of the circular through hole; the pull rod is fixed to a handle of the clutch, and an outer sleeve for main shaft can slide on the inner wall of the circular through hole; a sleeve rod for main shaft is fixed with a small sleeve, and a spring and a sheath cover are sleeved in sequence; a protective cover is fixed on the lug boss, and a dustproof cover is fixed on the protective cover; a four-piece spring is screwed up in the small sleeve, and a clamping head for four-piece spring is clamped on a taper hole for sleeve cover; a support which plays a role of antilock is arranged in the four-piece spring, and thus, the clamping phenomenon is avoided when the four-piece spring is retracted. A clamping needle with a machining tool is clamped by the four-piece spring, and a friction plate B is fixed at one end of the main shaft. The high-speed machine head has the advantages of convenient operation, safety, reliability, long service life and wide application range.

Description

High-speed handpiece

Technical field

The present invention relates to a kind of machining tool, particularly relate to a kind of accurately machined high-speed handpieces of the little metalwork of industry such as hospital, jewellery, metallurgy, machinery that are used for.

Background technology

As everyone knows, at present, like product has following deficiency: under end-of-job rear motor duty, after taking off machining tool, in case forgotten the new machining tool of timely insertion, pull clutch handle main shaft is resetted, contracting to eject in the dop that can be because of pintongs spring front end stuck phenomenon occurs, thus cause whole head necrosis, scrap; Main shaft exposes in addition, and the unprotect device human body very easily occurs because of the injured phenomenon of false touch, also can quicken the wearing and tearing of upper shield and pintongs spring; Friction clutch, easily causes damage parts, thereby has a strong impact on the service life of complete machine by the conduction of metal direct friction because of adopting metal gasket; The pintongs spring is non-adjustable, after the wearing and tearing, loses original elasticity, can't clamp machining tool, has a strong impact on the life-span and the product quality of pintongs spring.

Summary of the invention

Main purpose of the present invention is to overcome above deficiency and a kind of simple operation is provided, and is safe and reliable, the high-speed handpiece of long service life and applied range.

The technical solution adopted for the present invention to solve the technical problems is: it comprises handpiece case; drive rod assembly; spindle assemblies; clutch and spindle clutch bar; it is characterized in that: handpiece case is the tubular eccentric body; be fixed with friction clutch pull bar and clutch handle in eccentric part; the circular hole that perforation is arranged in the handpiece case; the left end of circular hole has internal thread; with the driving shaft on the screw thread fixed drive shaft assembly; one end of driving shaft is fixed with small belt pulley; the end of the other end is fixed with wear-resisting and high-intensity nonmetal A friction plate; the right side of handpiece case has boss; have reverse external screw thread on the boss; the right side of circular hole penetrates spindle assemblies in handpiece case; the outer screw of applying mechanically of main shaft is fixed on the clutch pull rod; pull bar and clutch handle are fixed into one; the inwall of circular hole is slidingly matched on overcoat on the main shaft and the handpiece case; main shaft by bearings in overcoat; main shaft has by loop bar at the external part of handpiece case; small sleeve; spring; upper shield; over cap; dust cap; the pintongs spring; the spindle assemblies that card pin and machining tool are formed; loop bar is fixed on the main shaft; loop bar and small sleeve are fixed together; spring housing is in the small sleeve outside; upper shield is enclosed within the spring outside; the left side of over cap is fixed on the boss on the handpiece case by reverse thread; dust cap is fixed on the right side of over cap with screw thread; the pintongs spring is screwed in the small sleeve by its end; the front end dop of pintongs spring is stuck in the taper hole of front end of upper shield; one end of card pin is sandwiched in the opening part of pintongs spring dop; the other end of card pin is fixed with machining tool, and the contact jaw of main shaft and driving shaft is fixed with wear-resisting and high-intensity nonmetal B friction plate.

The present invention can also adopt following technical measures:

The endoporus of described small sleeve is threaded, and the bottom of small sleeve is fixed with the screw or the square inner bore screw of band hexagonal endoporus.

Described upper shield front end has the A flange, and the rear portion is taper, little outer big taper hole in the endoporus of other end end has;

Described over cap, its an end diameter is big, has reverse internal thread, and other end diameter is little, has the forward external screw thread on it, and the centre has the through hole of band platform.

Have on the outer surface circumference of described pintongs spring and be mutually 90 ° of four grooves, one end of pintongs spring has external screw thread, the big and flare of other end dop diameter, be cut into pintongs with being mutually 90 ° of four grooves, dop has the B flange, the centre bore of pintongs spring is embedded in supporter, has the aperture of dislocation around the supporter.

It is circular or square or hexagon that described pintongs spring dop has the B flange.

Advantage and good effect that the present invention has are: the boss of supporter that is embedded in because of the pintongs spring and dop outside makes the pintongs spring stuck phenomenon can not occur when retraction; Have protective devices such as over cap and dust cap, slow down the wearing and tearing of upper shield and pintongs spring, prolong it and used the life-span, and make the staff can be not injured because of the machine of false touch high-speed cruising in when operation, and the limb support point when providing an operation for it, slow down fatigue, so safe and reliable; Friction plate A and B have adopted nonmetal high-strength abrasion-proof material, make the long service life of part, the applied range of head, and it can be widely used in the little metalwork fine finishining of industry such as hospital's dentistry, artificial limb making, jewellery, metallurgy, machinery.

Description of drawings

Fig. 1 is a contour structures schematic diagram of the present invention;

Fig. 2 is a mounting structure schematic diagram of the present invention;

Fig. 3 is a spindle assemblies section structure schematic diagram;

Fig. 4 is upper shield 11 structural representations;

Fig. 5 is over cap 12 structural representations;

Fig. 6 is pintongs spring 14 structural representations;

Fig. 7 is the right TV structure schematic diagram of Fig. 6.

Among Fig. 1-Fig. 7: 1. handpiece case, 2. clutch handle, 3. driving shaft, 4. small belt pulley; 5.A friction plate, 6. boss, 7. main shaft, 8. loop bar; 9. small sleeve, 10. spring, 11. upper shields, 12. over caps; 13. dustproof 14. pintongs springs, 15. card pins, 16. machining tools, 17.B friction plate; 18. the screw of band hexagonal endoporus, 19. flanges, 20. taper holes, 21. supporters; 22. aperture, 23.B flange, 24. overcoats, 25. screws.

The specific embodiment

For further understanding summary of the invention characteristics of the present invention and effect, now for example and conjunction with figs. be described in detail as follows, see also Fig. 1-Fig. 7.

As shown in Figure 1-Figure 3: handpiece case 1 is the tubular eccentric body, be fixed with friction clutch pull bar and clutch handle 2 in eccentric part, the circular hole that perforation is arranged in the handpiece case 1, the left end of circular hole has internal thread, with the driving shaft 3 on the screw thread fixed drive shaft assembly, one end of driving shaft 3 is fixed with small belt pulley 4, by motor drives small belt pulley 4 rotation at a high speed, the end of the other end of driving shaft 3 is fixed with wear-resisting and high-intensity nonmetal A friction plate 5, the right side of handpiece case 1 has boss 6, have reverse external screw thread on the boss 6, the right side of circular hole penetrates spindle assemblies in handpiece case 1, the overcoat 24 usefulness screws 25 of spindle assemblies are fixed on the clutch pull rod, pull bar and clutch handle 2 are fixed into one, the inwall of circular hole is slidingly matched on main shaft 7 on the spindle assemblies and the handpiece case 1, main shaft 7 has by loop bar 8 at the external part of handpiece case 1, small sleeve 9, spring 10, upper shield 11, over cap 12, dust cap 13, pintongs spring 14, the spindle assemblies that card pin 15 and machining tool 16 are formed, loop bar 8 is fixed on the main shaft 7, loop bar 8 and small sleeve 9 are fixed together, spring 10 is enclosed within small sleeve 9 outsides, upper shield 11 as shown in Figure 4 is enclosed within spring 10 outsides, one end of upper shield 11 has A flange 19, the other end has inner small and outside big taper hole 20, the rear portion of upper shield 11 is a cone, over cap 12 as shown in Figure 5, an its end diameter is big, have reverse internal thread, other end diameter is little, have the forward external screw thread on it, the centre has the through hole of band platform, the left side of over cap 12 is fixed on the boss 6 on the handpiece case 1, as shown in Figure 3 by reverse thread: the A flange 19 on the upper shield 11 leaves gap A with the inwall of over cap 12; The dust cap 13 usefulness screw threads that have internal thread are fixed on the right side of over cap 12, because the over cap 12 of this kind structure and the front end that dust cap 13 covers on main shaft 7, blocked exposing of upper shield 11, so in the process of grinding operation, played protective action, slow down operating personnel's hand and take the wearing and tearing of work piece upper shield 11 and pintongs spring 14, and avoided personnel injured because of false touch, and the strong point of the limbs when providing an operation for it, slow down fatigue, improved stability, safe and reliable, and improved product quality, reduce the frequency of renewal part, improved operating efficiency; As Fig. 6, have on the outer surface circumference of pintongs spring 14 shown in Figure 7 and be mutually 90 ° of four grooves, one end of pintongs spring 14 has external screw thread, the big and flare of the dop diameter of the other end, dop has B flange 23, B flange 23 is that circular (or square or hexagon) is cut into pintongs with being mutually 90 ° of four grooves, the centre bore of pintongs spring 14 is embedded in supporter 21, supporter 21 and B flange 23 are when pintongs spring 14 retractions, all can limit the retraction limit of pintongs spring 14 dops, thereby avoid the stuck of device, guarantee that part is not damaged, have the aperture 22 of dislocation around the supporter 21 vertically, back aperture 22 is installed is aimed at four grooves respectively, purpose is when running up, radiating and cooling, let out dirt, oil extraction is to keep the chucking power of pintongs spring.Pintongs spring 14 is screwed in the small sleeve 9 by its end, in the small sleeve 9, its bottom is fixed with the screw 18 of band hexagonal endoporus, can regulate the collapsing length of pintongs spring 14 by the screw 18 of band endoporus, to guarantee still have original clamping dynamics after pintongs spring 14 is worn, the front end dop of pintongs spring 14 is stuck in the taper hole 20 of front end of upper shield 11, and an end of card pin 15 is sandwiched in the opening part of pintongs spring 14 dops, and the other end of card pin 15 is fixed with machining tool 16; Main shaft 7 is fixed with wear-resisting and high-intensity nonmetal B friction plate 17 with the contact jaw of driving shaft 3, A friction plate 5 and B friction plate 17 constitute clutch, pull clutch handle 2 overcoat 24 is horizontally slipped in the circular hole of handpiece case 1, and realize opening and closing of driving shaft 3 and main shaft 7.

When needs take out card pin 15 and machining tool 16; pulling clutch handle 2 pushes away main shaft 7 forward and breaks away from and being connected of driving shaft 3; meanwhile; the flange 19 on the upper shield 11 and the inwall dieback of over cap 12; originally the gap A that left disappears; therefore; pintongs spring 14 is pushed out, and the opening of pintongs spring 14 dops opens, and can take out card pin 15 and machining tool 16; at work in case forgotten new card pin 15 of timely insertion and machining tool 16; simultaneously pull clutch handle 2 again main shaft 7 is resetted, at this moment, pintongs spring 14 retractions; because of being fixed with supporter 21 in the pintongs spring 14; and there is a B flange 23 pintongs spring 14 dop outsides, at this moment, are subjected to the restriction of supporter 21 or B flange 23 during pintongs spring 14 retractions; and can not bounce back into fully, stuck phenomenon can not appear therefore.

Its advantage is: because being embedded in bracing or strutting arrangement at the pintongs spring, there is boss the outside, thereby card can not occur Dead phenomenon, simple operation, with protective devices such as over cap and dust caps, the staff when operation not Can be injured, safe and reliable, the long service life of part, the applied range of machine, it can be widely used in The fine finishining of the little metalworks of industry such as hospital's dentistry, artificial limb making, jewellery, metallurgy, machinery.

Claims

1. high-speed handpiece; it comprises handpiece case; drive rod assembly; spindle assemblies; clutch and spindle clutch bar; it is characterized in that: handpiece case (1) is the tubular eccentric body; be fixed with friction clutch pull bar and clutch handle (2) in eccentric part; the circular hole that perforation is arranged in the handpiece case (1); the left end of circular hole has internal thread; with the driving shaft (3) on the screw thread fixed drive shaft assembly; one end of driving shaft (3) is fixed with small belt pulley (4); the end of the other end is fixed with wear-resisting and high-intensity nonmetal A friction plate (5); the right side of handpiece case (1) has boss (6); boss has reverse external screw thread on (6); the right side of circular hole penetrates spindle assemblies in handpiece case (1); the overcoat of spindle assemblies (24) is fixed on the clutch pull rod with screw (25); pull bar and clutch handle (2) are fixed into one; overcoat on the main shaft (24) is slidingly matched with the inwall that handpiece case (1) is gone up circular hole; main shaft (7) by bearings in overcoat (24); main shaft (7) has by loop bar (8) at the external part of handpiece case (1); small sleeve (9); spring (10); upper shield (11); over cap (12); dust cap (13); pintongs spring (14); the spindle assemblies that card pin (15) and machining tool (16) are formed; loop bar (8) is fixed on the main shaft (7); loop bar (8) and small sleeve (9) are fixed together; spring (10) is enclosed within small sleeve (9) outside; upper shield (11) is enclosed within spring (10) outside; the left side of over cap (12) is fixed on the boss (6) on the handpiece case (1) by reverse thread; dust cap (13) is fixed on the right side of over cap (12) with screw thread; pintongs spring (14) is screwed in the small sleeve (9) by its end; the front end dop of pintongs spring (14) is stuck in the taper hole (20) of upper shield (11) front end; one end of card pin (15) is sandwiched in the opening part of pintongs spring (14) dop; the other end of card pin (15) is fixed with machining tool (16), and main shaft (7) is fixed with wear-resisting and high-intensity nonmetal B friction plate (17) with the contact jaw of driving shaft (3).

2. high-speed handpiece according to claim 1 is characterized in that: the endoporus of described small sleeve (9) is threaded, and the bottom of small sleeve (9) is fixed with the screw (18) or the square inner bore screw of band hexagonal endoporus.

3. high-speed handpiece according to claim 1 is characterized in that: it is taper that described upper shield (11) front end has A flange (19) rear portion, little outer big taper hole (20) in the endoporus of other end end has.

4. high-speed handpiece according to claim 1 is characterized in that: described over cap (12), and its an end diameter is big, has reverse internal thread, and other end diameter is little, has the forward external screw thread on it, and the centre has the through hole of band platform.

5. high-speed handpiece according to claim 1, it is characterized in that: have on the outer surface circumference of described pintongs spring (14) and be mutually 90 ° of four grooves, one end of pintongs spring (14) has external screw thread, the big and flare of other end dop diameter, be cut into pintongs with being mutually 90 ° of four grooves, dop has B flange (23), and the centre bore of pintongs spring (14) is embedded in supporter (21), has the aperture (22) of dislocation around the supporter (21).

6. high-speed handpiece according to claim 5 is characterized in that: it is circular or square or hexagon that described pintongs spring (14) dop has B flange (23).