CN2663063Y - Continuously variable transmission mechanism of bench drill - Google Patents
Continuously variable transmission mechanism of bench drill Download PDFInfo
- Publication number
- CN2663063Y CN2663063Y CN 200320106447 CN200320106447U CN2663063Y CN 2663063 Y CN2663063 Y CN 2663063Y CN 200320106447 CN200320106447 CN 200320106447 CN 200320106447 U CN200320106447 U CN 200320106447U CN 2663063 Y CN2663063 Y CN 2663063Y
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- CN
- China
- Prior art keywords
- shaft
- belt wheel
- headstock
- taper
- belt
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a stepless speed change mechanism of bench drill, which belongs to the technical field of machine tool component, and mainly comprises transmission belts and a transmission fitting. The transmission fitting comprises a driving tapered upper half belt wheel, a driving tapered lower half belt wheel, a compression spring, a sleeve shaft of the main shaft, a driven tapered lower half belt wheel, a driven tapered upper half belt wheel provided with a shaft shoulder and sliding along a long bond, a bush arranged at the shaft shoulder through the bearing and provided with two lateral grooves, a speed regulating mechanism arranged at a headstock, and transmission belts. The transmission belts are arranged between the driving tapered upper and lower half belt wheels and between the driven tapered upper and lower half belt wheels. The speed regulating mechanism comprises a shaft sleeve fixed at the headstock, a worm, a knob, a vertical shaft seat, a vertical shaft with screw threads, a worm wheel, a shift fork arranged through screw threads at upper end of the vertical shaft and provided with two lateral fork legs. The two lateral fork legs are inserted respectively in two lateral grooves of the bush. The utility model has more reasonable and simple structure, larger scale of speed radio of stepless speed change, and more convenient operation, thus being used extensively for various drilling machines.
Description
Technical field
The utility model belongs to the machine tool component technical field, more particularly relates to the improvement of the stepless speed changing mechanism of bench drill.
Background technology
Existing drilling machine mostly is step speed change.Its kind of drive is: motor drives driving cone pulley, belt, driven cone pulley, main shaft and drill chuck rotation successively.When needing speed change, be under dead ship condition, with hand driving belt is moved on to another from one group of driving and driven belt pulley of cone pulley and organize on the driving and driven belt pulley.Its gear ratio is limited several.Variable speed operation is also very loaded down with trivial details, time-consuming.
01268709.X number Chinese patent discloses a kind of stepless speed changing mechanism of drilling machine.Its structure is simpler, has realized infinitely variable speeds.But during speed change, two belt pulley will depart from the center line of driving belt, and structure is reasonable inadequately.In addition, the scope of its gear ratio is less, can not continuous change in bigger ratio coverage, also just can not adapt to the requirement of different materials workpiece and different production efficiencys more widely.
The purpose of this utility model, just be to overcome above-mentioned shortcoming and defect, provide a kind of structure more reasonable, also more simple, can in bigger ratio coverage, realize infinitely variable speeds, thereby can adapt to the requirement of different materials workpiece and different production efficiencys more widely, the stepless speed changing mechanism of easy to operate drilling machine.
Summary of the invention
In order to achieve the above object, the utility model driving member of comprising driving belt and driving belt being installed.Driving member comprises the active taper upper half belt wheel that is fixed on the bench drill motor shaft, being installed in long key also can be along second belt wheel of active taper of long key slip on the motor shaft, be sleeved on the compression spring between motor shaft shoulder and second belt wheel of active taper on the motor shaft, be installed in main shaft sleeve on the headstock with bearing, be fixed on second belt wheel of driven taper on the main shaft sleeve, be installed in long key and have the shaft shoulder and can be on the main shaft sleeve along first belt wheel of driven taper of long key slip, be installed on the shaft shoulder and have the lining of grooves on two sides with bearing, be installed in and have shift fork on the headstock and can stir speed adjusting gear and the driving belt that lining moves up and down.Driving belt is installed in initiatively taper two and half belt wheels and driven taper up and down between two and half belt wheels up and down.
Speed adjusting gear comprise with screw be fixed on the headstock side axle sleeve, be installed in worm screw in the axle sleeve, be fixed on the worm screw end and be arranged in the headstock outside knob, be fixed on the vertical shaft seat vertically installed on the headstock, be installed in vertical shaft seat and its upper end with externally threaded vertical shaft, be fixed on the vertical shaft lower end and with the worm gear of worm engaging, have internal thread so as to be installed in the vertical shaft upper end and have about the shift forks of two fork legs.Two fork legs are inserted in respectively in the grooves on two sides of lining about shift fork.
During speed governing, reverse knob continuously with hand, knob just drives worm screw, worm gear, vertical shaft rotation successively.During the vertical shaft rotation, can not rotate because of the shift fork that is installed on it is subjected to the restriction of lining, shift fork just can only move up and down along vertical shaft.Successively drive lining when shift fork moves up and down, first belt wheel of driven taper moves up and down.When first belt wheel of driven taper moved up continuously, the spacing of upper and lower two and half belt wheels of driven taper increased, and the rotation diameter of driving belt on driven pulley reduces.Because of driving belt is lax, the compression spring is upwards oppressed driving belt, and the spacing of upper and lower two and half belt wheels of active taper is reduced, and the rotation diameter of driving belt on driving wheel increases.So the gearratio of drilling machine just can increase continuously.When first belt wheel of driven taper moved down continuously, the spacing of upper and lower two and half belt wheels of driven taper reduced, and the rotation diameter of driving belt on driven pulley increases.Because of the driving belt tensioning, it makes the initiatively spacing increase of upper and lower two and half belt wheels of taper just to lower compression compression spring, and the rotation diameter of driving belt on driving wheel reduces.So the gearratio of drilling machine just can reduce continuously.
Task of the present utility model comes to this and finishes.
The utility model provides a kind of structure more reasonable, also more simple, can in bigger ratio coverage, realize infinitely variable speeds, thereby can adapt to the requirement of different materials workpiece and different production efficiencys, the stepless speed changing mechanism of easy to operate drilling machine more widely.It can be widely used in the various drilling machines.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of speed adjusting gear.
Fig. 3 is the structure chart of lining.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the structure chart of shift fork.
Fig. 6 is the vertical view of Fig. 5.
The specific embodiment
The stepless speed changing mechanism of 1. 1 kinds of bench drills of embodiment is as Fig. 1～shown in Figure 6.It comprises driving belt 1 and the driving member that driving belt is installed.Driving member comprises the active taper upper half belt wheel 3 that is fixed on the bench drill motor shaft 2, being installed in long key 4 also can be along second belt wheel 5 of active taper of long key 4 slips on the motor shaft 2, be sleeved on the compression spring 6 between motor shaft shoulder and second belt wheel 5 of active taper on the motor shaft 2, be installed in main shaft sleeve 9 on the headstock 8 with bearing 7, be fixed on second belt wheel 10 of driven taper on the main shaft sleeve 9, be installed in long key 11 and have the shaft shoulder and can be on the main shaft sleeve 9 along first belt wheel 12 of driven taper of long key 11 slips, be installed on the shaft shoulder and have the lining 14 of grooves on two sides 15 with bearing 13, be installed in and have shift fork on the headstock 8 and can stir speed adjusting gear 16 and the driving belt 1 that lining 14 moves up and down.Driving belt 1 is installed in initiatively taper two and half belt wheels 3,5 and driven taper up and down between two and half belt wheels 12,10 up and down.
Fig. 2～shown in Figure 6, speed adjusting gear 16 comprise with screw 17 be fixed on headstock 8 sides axle sleeve 18, be installed in worm screw 19 in the axle sleeve 18, be fixed on worm screw 19 ends and be arranged in headstock 8 outsides knob 20, be fixed on the vertical shaft seat 21 vertically installed on the headstock 8, be installed in vertical shaft seat 21 and its upper end with externally threaded vertical shaft 22, be fixed on vertical shaft 22 lower ends and with the worm gear 23 of worm screw 19 engagements, have internal thread so as to be installed in vertical shaft 22 upper ends and have about the shift forks 25 of two fork legs 24.Two fork legs 24 are inserted in respectively in the grooves on two sides 15 of lining 14 about shift fork 25.26 is the column of drilling machine, and 27 is its main shaft.
Embodiment 1 structure is more reasonable, simple, and infinite variable speed ratio coverage is bigger, more convenient operation.It can be widely used in the various drilling machines.
Claims (2)
1. the stepless speed changing mechanism of a bench drill, it comprises driving belt and the driving member that driving belt is installed, it is characterized in that said driving member comprises the active taper upper half belt wheel that is fixed on the bench drill motor shaft, being installed in long key also can be along second belt wheel of active taper of long key slip on the motor shaft, be sleeved on the compression spring between motor shaft shoulder and second belt wheel of active taper on the motor shaft, be installed in main shaft sleeve on the headstock with bearing, be fixed on second belt wheel of driven taper on the main shaft sleeve, be installed in long key and have the shaft shoulder and can be on the main shaft sleeve along first belt wheel of driven taper of long key slip, be installed on the shaft shoulder and have the lining of grooves on two sides with bearing, be installed in and have shift fork on the headstock and can stir speed adjusting gear and the driving belt that lining moves up and down, driving belt is installed in initiatively taper two and half belt wheels and driven taper up and down between two and half belt wheels up and down.
2. according to the stepless speed changing mechanism of the described bench drill of claim 1, it is characterized in that said speed adjusting gear comprises the axle sleeve that is fixed on the headstock side with screw, be installed in the worm screw in the axle sleeve, be fixed on the worm screw end and be positioned at the knob in the headstock outside, be fixed on the vertical shaft seat of vertically installing on the headstock, be installed in the vertical shaft seat and externally threaded vertical shaft is with in its upper end, be fixed on the vertical shaft lower end and with the worm gear of worm engaging, have internal thread so as to be installed in vertical shaft upper end and have about the shift forks of two fork legs, two fork legs are inserted in respectively in the grooves on two sides of lining about shift fork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320106447 CN2663063Y (en) | 2003-10-21 | 2003-10-21 | Continuously variable transmission mechanism of bench drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320106447 CN2663063Y (en) | 2003-10-21 | 2003-10-21 | Continuously variable transmission mechanism of bench drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2663063Y true CN2663063Y (en) | 2004-12-15 |
Family
ID=34341684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320106447 Expired - Lifetime CN2663063Y (en) | 2003-10-21 | 2003-10-21 | Continuously variable transmission mechanism of bench drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2663063Y (en) |
-
2003
- 2003-10-21 CN CN 200320106447 patent/CN2663063Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131021 Granted publication date: 20041215 |