CN2801347Y - Stepless speed change mechanism of bench drill - Google Patents
Stepless speed change mechanism of bench drill Download PDFInfo
- Publication number
- CN2801347Y CN2801347Y CN 200520085007 CN200520085007U CN2801347Y CN 2801347 Y CN2801347 Y CN 2801347Y CN 200520085007 CN200520085007 CN 200520085007 CN 200520085007 U CN200520085007 U CN 200520085007U CN 2801347 Y CN2801347 Y CN 2801347Y
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- CN
- China
- Prior art keywords
- belt wheel
- taper
- shaft
- driven
- tooth bar
- 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 - Fee Related
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Abstract
The utility model relates to a stepless speed changing mechanism of a bench drill. The utility model is arranged between a main shaft and an electric machine. The utility model comprises a driving conical upper half belt wheel, a driving conical lower half belt wheel, a compression spring which is sheathed on a shaft of the electric machine and is positioned between a shaft shoulder of the electric machine and the driving conical lower half belt wheel, a driven conical lower half belt wheel, a driven conical upper half belt wheel and a driving belt, A bearing is arranged on a shaft shoulder of the driven conical upper half belt wheel. The outer surface of the bearing is sheathed with a cross arm, wherein the right end of which is vertically fixed with a gear rack, wherein the middle part of which is provided with a tooth. A shaft hole or a bearing seat is arranged on a selective headstock. A gear wheel shaft engaged with the gear rack is arranged in the shaft hole or the bearing seat. One end of the gear wheel shaft is fixed with a handle. The lower end of the gear rack is provided with a block ring. The inner side of the selective headstock is fixed with a support frame sheathed at the lower part of the gear rack through a vertical hole. The compression spring is sheathed between the support frame and the block ring on the gear rack. The handle does not need to be locked, and the speed ratio of the bench drill can be optionally and stably controlled. The operation is simple, the productive efficiency is high and the utility model can be used in various bench drills.
Description
Technical field
The utility model belongs to the bench drill technical field, more particularly relates to the improvement of the stepless speed changing mechanism of bench drill.
Background technology
Traditional 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.
The applicant's 01268709.X, 02268449.2 and No. 200320106447.4 Chinese patent disclose the stepless speed changing mechanism of several drilling machines.Its structure is simpler, has realized infinitely variable speeds.But up to now, the infinitely variable speeds drilling machine is worked under certain specific speed ratio that needs for the control drilling machine when speed change, all needs joystick is locked in ad-hoc location, otherwise can cause gear positioning, gear ratio change.And the operation of lock handle bothers, and is time-consuming.In other words, up to now, still there is not a kind of drilling machine that does not need lock handle can arbitrarily, stably control speed ratio to occur.
Summary of the invention
The purpose of this utility model just is to overcome above-mentioned shortcoming and defect, and a kind of stepless speed changing mechanism of bench drill is provided.It need not lock handle can arbitrarily, stably control the speed ratio of bench drill, operates very simply, and production efficiency is also high.
In order to achieve the above object, the utility model is installed between the main shaft and motor of bench drill.It comprises the active taper upper half belt wheel that is fixed on the motor shaft upper end, 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 fixed on second belt wheel of driven taper on main shaft top, be installed in main shaft upper end and upper end with long key and have the shaft shoulder and first belt wheel of driven taper that can slide along long key and be installed in the active taper driving belt between second belt wheel in half belt wheel and the driven taper up and down, on the shaft shoulder of driven first belt wheel of taper bearing is installed.The main shaft top is positioned at the bearing upside and is fixing axle bumper.Bearing outside suit transverse arm, and transverse arm right-hand member vertical fixing the toothed tooth bar in middle part.The left and right sides of headstock has axis hole or bearing block is installed, and is installed with in axis hole or the bearing block and tooth bar meshed gears axle.One end of gear shaft is positioned at the fixed outside of headstock and handle.The lower end of tooth bar has back-up ring, and the support that has upright opening is being fixed in the headstock inboard, and support is sleeved on the tooth bar bottom with upright opening.On the tooth bar between support and back-up ring suit the compression spring.
The motor shaft shoulder and initiatively the upper-lower position that makes second belt wheel of taper initiatively of the compression spring between second belt wheel of taper float with the pressure of driving belt, play the speed governing effect.
Initiatively taper upper half belt wheel, second belt wheel of active taper, first belt wheel of driven taper and second belt wheel of driven taper are made by aluminium alloy.Aluminium alloy is in light weight, intensity is high, function admirable.
Speed governing of the present utility model is performed such: pull handle with hand and make the gear shaft rotation, gear shaft just can drive tooth bar and move up and down.When moving on the tooth bar, drive on first belt wheel of driven taper and move, the spacing between upper and lower half belt wheel of driven taper is strengthened.So the radius of turn of driving belt on upper and lower half belt wheel of driven taper reduces, the radius of turn on upper and lower half belt wheel of active taper strengthens thereupon, that is causes the rotating speed of main shaft to improve.Otherwise, oppositely pull handle, when tooth bar moves down, drive first belt wheel of driven taper and move down, the spacing between upper and lower half belt wheel of driven taper is reduced.So the radius of turn of driving belt on upper and lower half belt wheel of driven taper strengthens, the radius of turn on upper and lower half belt wheel of active taper reduces thereupon, that is causes the rotating speed of main shaft to slow down.
Driving belt is oppressed upper and lower half belt wheel of driven taper all the time when work, make first belt wheel of driven taper be subjected to tension force upwards.During with the handle speed governing, this tension force passes to transverse arm and tooth bar, makes transverse arm and tooth bar be subjected to tension force upwards equally all the time.Therefore, traditional infinitely variable speeds drilling machine must fix on ad-hoc location with handle lock, otherwise can cause speed change positioning, gear ratio change.But the utility model can not produce this problem.Because the compression spring that is sleeved between support and the back-up ring adds to transverse arm and downward tension force of tooth bar all the time.Downward tension force and the tension force that makes progress are in poised state, and making handle all is stable in any position, that is corresponding speed ratio also is stable.
The axle bumper of main shaft can avoid handle to make too upward dislocation of transverse arm when speed governing.
Task of the present utility model comes to this and finishes.
The utility model provides a kind of stepless speed changing mechanism of bench drill.It need not lock handle can arbitrarily, stably control the speed ratio of bench drill, operates very simply, and production efficiency is also high.It can be widely used in the various bench drills.
Description of drawings
Fig. 1 is a structural representation of the present utility model, and headstock and driving belt are by partly cut-away.
The specific embodiment
Embodiment 1.A kind of stepless speed changing mechanism of bench drill, as shown in Figure 1.Bench drill is made of parts such as base 1, column 2, workbench 3, headstock 4, motor 5, main shaft 6, rack sleeve 7, feed mechanisms 8.The utility model is installed between main shaft 6 and the motor 5.Comprise the active taper upper half belt wheel 9 that is fixed on the motor shaft upper end, being installed in long key also can be along second belt wheel 10 of active taper of long key slip on the motor shaft, be sleeved on the compression spring 11 between motor shaft shoulder and second belt wheel 10 of active taper on the motor shaft, be fixed on second belt wheel 13 of driven taper on main shaft 6 tops, being installed in main shaft 6 upper ends and upper end with long key has the shaft shoulder 22 and first belt wheel 14 of driven taper that can slide along long key and is installed in the active taper driving belt 12 between second belt wheel in half belt wheel and the driven taper up and down.On the shaft shoulder of first belt wheel 14 of driven taper bearing 23 is installed.Main shaft 6 tops are positioned at bearing 23 upsides and are fixing axle bumper 24.Bearing 23 outside suits transverse arm 15, and transverse arm 15 right-hand member vertical fixing the toothed tooth bar 16 in middle part.The left and right sides of headstock 4 has axis hole or bearing block 18 is installed, and is installed with in axis hole or the bearing block 18 and tooth bar 16 meshed gears axles 17.One end of gear shaft 17 is positioned at the fixed outside of headstock 4 and handle 25.The lower end of tooth bar 16 has back-up ring 20, and the support 19 that has upright opening is being fixed in headstock 4 inboards, and support 19 is sleeved on tooth bar 16 bottoms with upright opening.On the tooth bar 16 between support 19 and back-up ring 20 suit compression spring 21.
Initiatively taper upper half belt wheel 9, initiatively second belt wheel of second belt wheel 10 of taper, first belt wheel 14 of driven taper and driven taper 13 is made by aluminium alloy.
Embodiment 1 need not lock handle can arbitrarily, stably control the speed ratio of bench drill, operates very simply, and production efficiency is also high.It can be widely used in the various bench drills.
Claims (2)
1. the stepless speed changing mechanism of a bench drill, be installed between the main shaft and motor of bench drill, it is characterized in that it comprises the active taper upper half belt wheel that is fixed on the motor shaft upper end, 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 fixed on second belt wheel of driven taper on main shaft top, be installed in main shaft upper end and have the shaft shoulder and can and be installed in the active taper driving belt between second belt wheel in half belt wheel and the driven taper up and down with long key along first belt wheel of driven taper of long key slip, on the shaft shoulder of driven first belt wheel of taper bearing is installed, the main shaft top is positioned at the bearing upside and is fixing axle bumper, bearing outside suit transverse arm, transverse arm right-hand member vertical fixing the toothed tooth bar in middle part, the left and right sides of headstock has axis hole or bearing block is installed, be installed with in axis hole or the bearing block and tooth bar meshed gears axle, one end of gear shaft is positioned at the fixed outside of headstock and handle, the lower end of tooth bar has back-up ring, the support that has upright opening is being fixed in the headstock inboard, support is sleeved on the tooth bar bottom with upright opening, on the tooth bar between support and back-up ring suit the compression spring.
2. according to the stepless speed changing mechanism of the described bench drill of claim 1, it is characterized in that said active taper upper half belt is taken turns, initiatively second belt wheel of taper, first belt wheel of driven taper and second belt wheel of driven taper are made by aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520085007 CN2801347Y (en) | 2005-07-04 | 2005-07-04 | Stepless speed change mechanism of bench drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520085007 CN2801347Y (en) | 2005-07-04 | 2005-07-04 | Stepless speed change mechanism of bench drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2801347Y true CN2801347Y (en) | 2006-08-02 |
Family
ID=36846052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520085007 Expired - Fee Related CN2801347Y (en) | 2005-07-04 | 2005-07-04 | Stepless speed change mechanism of bench drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2801347Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772789A (en) * | 2015-04-13 | 2015-07-15 | 安徽省黄山台钻有限公司 | Molding and hole forming all-in-one machine for Buddha beads |
| CN106077738A (en) * | 2016-07-17 | 2016-11-09 | 谈茁 | A kind of bench drill |
| CN107138760A (en) * | 2017-05-19 | 2017-09-08 | 安徽铸星机械制造有限公司 | A kind of cutting machine head punching processing machinery |
| CN108145194A (en) * | 2017-12-25 | 2018-06-12 | 程琼明 | A kind of multiple degrees of freedom drilling machine |
-
2005
- 2005-07-04 CN CN 200520085007 patent/CN2801347Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772789A (en) * | 2015-04-13 | 2015-07-15 | 安徽省黄山台钻有限公司 | Molding and hole forming all-in-one machine for Buddha beads |
| CN106077738A (en) * | 2016-07-17 | 2016-11-09 | 谈茁 | A kind of bench drill |
| CN107138760A (en) * | 2017-05-19 | 2017-09-08 | 安徽铸星机械制造有限公司 | A kind of cutting machine head punching processing machinery |
| CN108145194A (en) * | 2017-12-25 | 2018-06-12 | 程琼明 | A kind of multiple degrees of freedom drilling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060802 Termination date: 20140704 |
|
| EXPY | Termination of patent right or utility model |