CN205315617U - Ball worm reducer - Google Patents
Ball worm reducer Download PDFInfo
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- CN205315617U CN205315617U CN201521140324.1U CN201521140324U CN205315617U CN 205315617 U CN205315617 U CN 205315617U CN 201521140324 U CN201521140324 U CN 201521140324U CN 205315617 U CN205315617 U CN 205315617U
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- worm reducer
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Abstract
The utility model discloses a ball worm reducer, it includes ball drive unit and worm wheel, transmission structure through the pure rolling between ball drive unit and the worm wheel cooperates. This reduction gear is pure rolling transmission structure's reduction gear, has characteristics such as high speed, high accuracy, high efficiency, and the input shaft slow -speed of revolution, the driving medium of effectively overcoming traditional worm gear speed reducer ware existence easily wear and tear, export positioning accuracy subalternation defect, can satisfy current electronics numeral automated control's machinery's demand.
Description
Technical field
This utility model relates to a kind of drive apparatus, is specifically related to a kind of decelerator.
Background technology
Reductor is a kind of relatively accurate machinery, and the purpose using it is to reduce rotating speed, increases torque. It of a great variety, model is different, and variety classes has different purposes. Decelerator of a great variety, can be divided into gear reduction unit, worm reducer and planetary reducer according to actuation types; Single-stage and multi-stage speed reducer can be divided into according to transmission progression difference; Cylinder gear speed reducer, cone gear reducer and circular cone-cylinder gear speed reducer can be divided into according to gear shape; Expansion, shunting and coaxial-type decelerator can be divided into again according to the arrangement form of transmission.
Worm type of reduction gearing in the market is that machinery industry is generally widely used in various transmissions; Its advantage is that transmission speed ratio is big, output moment of torsion is good, compact conformation. But owing between worm gear and the worm screw in this tradition decelerator being the transmission mode of sliding friction, this just cannot be avoided the rotating speed that there is power shaft low, driving member is easy to wear and generates heat, the defects such as backlass is big and output accuracy is poor, transmission efficiency is low, it is impossible to adapt to the demand of industrial age development.
Utility model content
The defects such as easy to wear, the output positioning precision difference of the power shaft slow-speed of revolution existing for sliding friction transmission mode, driving member are adopted for existing general widely used worm type of reduction gearing, the purpose of this utility model is in that to provide the decelerator of a kind of pure rolling drive mechanism, to solve the problem existing for prior art.
In order to achieve the above object, this utility model adopts the following technical scheme that:
Ball-screw worm reducer, described decelerator includes ball-screw driver element and worm gear, is coordinated by the drive mechanism of pure rolling between described ball-screw driver element and worm gear.
Preferably, the drive mechanism of pure rolling is formed between described ball-screw driver element and worm gear by roller ball.
Preferably, described worm gear is provided with hemi-spherical ended shape insert, described ball-screw driver element includes ballscrew shaft, least one set steel ball, pilot sleeve, described ballscrew shaft circumferential surface is provided with screw type gutter groove, and can automatically rotate be arranged in pilot sleeve, described least one set steel ball is placed in the screw type gutter groove on ballscrew shaft, and with pilot sleeve diameter compatible, and through pilot sleeve with on worm gear hemi-spherical ended shape insert rolling engage.
Preferably, described steel ball engages with ballscrew shaft and the rolling that worm gear is four point cantact.
Preferably, the screw type gutter groove on described ballscrew shaft is double; two R gutter forms.
Preferably, the screw type gutter groove on described ballscrew shaft is single head or multi end form.
Preferably, the hemi-spherical ended shape insert on described worm gear is double; two R gutter forms.
Preferably, described pilot sleeve is parallel construction.
Preferably, described pilot sleeve is applied with preload.
Preferably, also including steel ball circulating device in described decelerator, least one set steel ball carries out continuous circulating rolling by steel ball circulating device.
Preferably, described steel ball circulating device is arranged on ballscrew shaft or on pilot sleeve, described ballscrew shaft is provided with two screw type gutter grooves, is internally provided with core bore and coordinates with steel ball circulating device, form continuous print circulation road so that least one set steel ball carries out continuous circulating rolling.
Preferably, described steel ball circulating device includes circulation port, circulator, king pin and transition ring, and circulation port is separately positioned on two spiral gutter grooves adjacent in the middle of ballscrew shaft, and vertical with the core bore of ballscrew shaft communicates; Two sides of described circulation port are respectively symmetrically equipped with the circulator fastened with lead screw shaft; Described king pin and transition ring are arranged in the core bore of ballscrew shaft, and coordinate with circulator.
Based on the ball-screw worm reducer that such scheme is constituted, have at a high speed, in high precision, the advantage such as high efficiency, the mechanical field of current electronic digit Automated condtrol will be met, is also adapted to the demand of China's M4.0 and 2025 industrial age.
This ball-screw worm reducer has the advantage that relative to existing worm type of reduction gearing
1. this ball-screw worm reducer is a kind of by being the drive mechanism that four point cantact pure rolling constantly circulate engagement by the worm-gear toothing of the gutter groove in one or more groups steel ball and lead screw shaft and spherical dentation, and it has overturned the transmission mode structure of existing worm and gear sliding friction combination on Vehicles Collected from Market.
2. the rigidity of this ball-screw worm reducer and intensity height very, is that tradition worm reducer is incomparable.
3. this ball-screw worm reducer can use environment and load request according to difference, by meeting higher market demand widely with one or more groups steel ball Contact Transmission formula of touching.
4. this ball-screw worm reducer can conveniently by preloading mode, backlass in drive system is completely eliminated. with high-sensitive response frequency and high-precision output positioning performance, more adapt at a high speed, in high precision, the demand in high efficiency electronic digit Automated condtrol and robot building field.
5. the delivery efficiency of the transmission mode structure of the pure rolling in this ball-screw worm reducer is compared with traditional sliding friction transmission mode structure: can be brought up to more than 95% by original 65% 70%.
6. this ball-screw worm reducer is held time for a long time and long service life and the advantage such as input power is little due to transmission accuracy, considerably reduces use cost.
Accompanying drawing explanation
This utility model is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 be ball-screw worm reducer shown in Fig. 2 A-A to sectional view;
Fig. 2 be ball-screw worm reducer shown in Fig. 1 B-B to sectional view;
Fig. 3 is the schematic diagram of ballscrew shaft in this utility model example;
Fig. 4 be ballscrew shaft shown in Fig. 3 C-C to sectional view;
Fig. 5 is ball-screw worm reducer shown in Fig. 2 at D-D to the schematic diagram launching and going steel ball;
Fig. 6 is gutter orthogonal cross-section figure in this utility model example ball-screw worm reducer;
Fig. 7 is many group grinding ball transmission schematic diagrams in this utility model example ball-screw worm reducer.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, this utility model is expanded on further.
The ball-screw worm reducer provided in this example, it carries out transmission by the mode of pure rolling, thus being prevented effectively from existing worm type of reduction gearing to adopt the problem existing for sliding friction transmission mode.
Based on above-mentioned principle, this example provides a kind of concrete implementation scheme.
This ball-screw worm reducer mainly includes ball-screw driver element and worm gear, and coordinates composition decelerator by the drive mechanism of pure rolling between ball-screw driver element and worm gear.
Referring to Fig. 1 and Fig. 2, the ball-screw worm reducer in this programme mainly includes ballscrew shaft 5, pilot sleeve 4, steel ball 18 and worm gear 11.
Wherein, the circumferential surface of ballscrew shaft 5 is provided with screw type gutter groove, and what this ballscrew shaft 5 was free to rotate is arranged in pilot sleeve 4, and two ends of ballscrew shaft 5 are by the supporting of precision corner contact ball bearing 3 and 6. Nut 1 and packing ring 2 and side's lid 7 fixing under, it is ensured that ballscrew shaft 5 does not have any axially and radially beating and can rotate to light and flexible.
Referring to Fig. 2, the circumferential surface of worm gear 11 is provided with hemi-spherical ended shape insert, and this worm gear 11 integral installation is in the housing 12 of decelerator, and two ends are by the supporting of precision tapered bearing 10. Simultaneously under the adjustment of left end set 8 and right-hand member set 13 and packing ring 9 is fixing, make worm gear 11 be on the center of ballscrew shaft 5, and ensure that it does not have any axially and radially beating and can rotate to light and flexible.
Meanwhile, equipped with one or more groups large number of steel ball 18 in the spiral ball-type groove of ballscrew shaft 5, and with pilot sleeve diameter compatible, and ensure lead screw shaft can light and flexible rotate, this steel ball 18 is also meshed with hemi-spherical ended shape insert on worm gear 11 circumference simultaneously. The steel ball 18 thus arranged when ballscrew shaft 5 rotates, with roll form realize engage with the rolling of worm gear 11, then promote the corresponding angle of worm gear wheel of spherical dentation, it is achieved transmission.
The ball-screw worm reducer thus constituted, when external force is turned clockwise by lead screw shaft 5; One group of steel ball 18 is made to produce around the outer rotation through pure rolling of lead screw shaft 5 and revolution and promote worm gear 11 to rotate corresponding angle under the effect that pushes away of the steel ball 18 spiral spherical groove on lead screw shaft 5 circumference and under the internal diameter restriction of pilot sleeve 4. Namely lead screw shaft 5 rotation is turned around, so one group of steel ball 18 moves a pitch at axial direction, and the worm gear 11 being driven just have rotated the angle of a tooth, the number of teeth thus according to worm gear 11 design is also formed for required speed ratio i, therefore the input and output speed ratio i of this decelerator, the number of teeth of the pitch and worm gear that change screw axis can be adopted to realize.
On this basis, for ensure one group of steel ball 18 can rotation and revolution ground circulating rolling continuously in ball-type tooth in the spiral spherical groove of ballscrew shaft 5 and on worm gear 11 circumference, set up a steel ball circulating device further.
This steel ball circulating device may be provided on ballscrew shaft 5 or pilot sleeve 4, to realize the continuous shuttling movement of one or more groups steel ball.
In order to coordinate this steel ball circulating device, on ballscrew shaft 5, middle part arranges two spiral gutter grooves, is provided with core bore therein simultaneously, thus coordinates with steel ball circulating device, form continuous print circulation road so that least one set steel ball carries out continuous circulating rolling.
This steel ball circulating device is mainly cooperated by two circulation port E, F, circulator 17, king pin 14,15 and transition ring 15 and constitutes (referring to Fig. 3-Fig. 5).
This programme adopts the scheme arranging steel ball circulating device on ballscrew shaft 5. Referring specifically to Fig. 3-Fig. 4: on two spiral gutter grooves adjacent in the middle of ballscrew shaft 5, design has two circulation ports of E and F, and this circulation port is vertical with the core bore of lead screw shaft 5 to communicate. All be respectively provided with symmetrical and lead screw shaft 5 fastening circulator 17 in two sides of circulation port, this circulator 17 adopts R opening, to ensure that steel ball 18 forces steel ball enter smoothly and roll out circulation port when moving to circulation port edge.
Referring to Fig. 5, this programme is also also equipped with right turn pin 14 and three parts such as transition ring 15 and left steering pin 16 in the core bore of lead screw shaft 5, also fastens with lead screw shaft 5 respectively, for steel ball 18 is turned to guiding. Wherein right turn pin 14 and left steering pin 16 are respectively arranged with corresponding R groove, to drive steel ball 18 to turn to.
Based on the steel ball circulating device that such scheme is constituted, this ballscrew shaft 5 can effectively realize the continuous shuttling movement of one or more groups steel ball, and process is as follows:
When lead screw shaft 5 positive direction rotates, when the ball groove continuing on lead screw shaft 5 departing from the steel ball 18 after ballscrew shaft 5 and worm gear 11 contact area moves to circulation port edge, force steel ball 18 to be queued up successively under the restriction of pilot sleeve 4 internal diameter and under the guiding of the R opening of circulator 17 and enter E circulation port swimmingly.
Then, when enter the steel ball 18 of circulation port below under the promotion of steel ball after forcing steel ball 18 to turn to 90 ° under the R groove effect of right turn pin 14 along axially past the internal diameter crossing circle 15. Equally, under the R groove effect of left steering pin 16, return again to 90 ° by F circulation port, and under the R openings lead of another one circulator 18, return gutter groove adjacent in lead screw shaft 5. Achieve the circulating rolling that every steel ball 18 in turn carries out going round and beginning again like this.
In like manner; When lead screw shaft 5 opposite direction rotates, one group of steel ball 18 just circulating rolling in the opposite direction.
On this basis, this programme also can effectively realize the transmission organizing steel ball more, as it is shown in fig. 7, concrete transmission principle and process are as above, is not repeated herein.
For above-mentioned scheme, this example has also carried out following having optimization:
The shape of the hemi-spherical ended shape insert on worm gear 11 in this programme and the screw type gutter groove on ballscrew shaft 5 is designed as identical double; two R gutter form (as shown in Figure 6), ensure one or more groups steel ball and ballscrew shaft 5 and the rolling engagement that worm gear 11 is four point cantact, so better ensure that the contact precision of steel ball and lead screw shaft and worm gear and set up good lubricating place. Thus improving the rigidity of drive system further.
In order to be effectively improved and strengthen the bearing capacity of this ball-screw worm reducer, can be selected for the ball size being suitable for, many group steel balls also can be adopted simultaneously simultaneously to roll engaged mode and carry out transmission.
Furthermore, pilot sleeve in this programme is designed to parallel, by the L centre-to-centre spacing of lead screw shaft and worm-drive will be changed by trace with G for benchmark match grinding fairlead H height (as shown in Figure 1), screw axis just can be eliminated easily by changing the method for L centre-to-centre spacing, steel ball, the gap of the driving members such as worm gear and obtain desired pretension load.
Based on above-mentioned improvement project; It is controlled by the backlass applying suitable preload to be completely eliminated in drive system, to carry high-sensitive response frequency and high-precision output positioning performance, more adapt at a high speed, in high precision, the demand in high efficiency electronic digit Automated condtrol and robot building field.
The suitable preload of this applying realizes also by the pilot sleeve structure that design is eccentric.
It addition, the helicla flute on ballscrew shaft 5 can design single head or multi end form to meet load bearing capacity and the best of breed effect of desirable speed ratio as required.
The driving member bearing load in this ball-screw worm reducer: the parts such as lead screw shaft, steel ball, pilot sleeve, worm gear, this programme all selects superior alloy steel to pass through heat-treatment quenching, contact case hardness HRC56 62. and through grinding process machine-shaping, be thus greatly improved integral rigidity and the intensity of this ball-screw worm reducer.
Contrast is it can be seen that the ball-screw worm reducer of this example approach offer by experiment, and it, based on the transmission mode structure of unique pure rolling, compares with traditional sliding friction transmission mode structure in delivery efficiency; More than 95% can be brought up to by original 65% 70%, reach beyond thought effect.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described. Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model. This utility model claims scope and is defined by appending claims and equivalent thereof.
Claims (12)
1. ball-screw worm reducer, it is characterised in that described decelerator includes ball-screw driver element and worm gear, is coordinated by the drive mechanism of pure rolling between described ball-screw driver element and worm gear.
2. ball-screw worm reducer according to claim 1, it is characterised in that formed the drive mechanism of pure rolling between described ball-screw driver element and worm gear by roller ball.
3. ball-screw worm reducer according to claim 2, it is characterized in that, described worm gear is provided with hemi-spherical ended shape insert, described ball-screw driver element includes ballscrew shaft, least one set steel ball, pilot sleeve, described ballscrew shaft circumferential surface is provided with screw type gutter groove, and can automatically rotate be arranged in pilot sleeve, described least one set steel ball is placed in the screw type gutter groove on ballscrew shaft, and with pilot sleeve diameter compatible, and through pilot sleeve with on worm gear hemi-spherical ended shape insert rolling engage.
4. ball-screw worm reducer according to claim 3, it is characterised in that described steel ball engages with ballscrew shaft and the rolling that worm gear is four point cantact.
5. ball-screw worm reducer according to claim 3, it is characterised in that the screw type gutter groove on described ballscrew shaft is double; two R gutter forms.
6. ball-screw worm reducer according to claim 3, it is characterised in that the screw type gutter groove on described ballscrew shaft is single head or multi end form.
7. ball-screw worm reducer according to claim 3, it is characterised in that the hemi-spherical ended shape insert on described worm gear is double; two R gutter forms.
8. ball-screw worm reducer according to claim 3, it is characterised in that described pilot sleeve is parallel construction.
9. ball-screw worm reducer according to claim 8, it is characterised in that be applied with preload on described pilot sleeve.
10. ball-screw worm reducer according to claim 3, it is characterised in that also including steel ball circulating device in described decelerator, least one set steel ball carries out continuous circulating rolling by steel ball circulating device.
11. ball-screw worm reducer according to claim 10, it is characterized in that, described steel ball circulating device is arranged on ballscrew shaft or on pilot sleeve, described ballscrew shaft is provided with two screw type gutter grooves, it is internally provided with core bore to coordinate with steel ball circulating device, form continuous print circulation road so that least one set steel ball carries out continuous circulating rolling.
12. the ball-screw worm reducer according to claim 10 or 11, it is characterized in that, described steel ball circulating device includes circulation port, circulator, king pin and transition ring, circulation port is separately positioned on two spiral gutter grooves adjacent in the middle of ballscrew shaft, and vertical with the core bore of ballscrew shaft communicates; Two sides of described circulation port are respectively symmetrically equipped with the circulator fastened with lead screw shaft; Described king pin and transition ring are arranged in the core bore of ballscrew shaft, and coordinate with circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521140324.1U CN205315617U (en) | 2015-12-31 | 2015-12-31 | Ball worm reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521140324.1U CN205315617U (en) | 2015-12-31 | 2015-12-31 | Ball worm reducer |
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| Publication Number | Publication Date |
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| CN205315617U true CN205315617U (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521140324.1U Active CN205315617U (en) | 2015-12-31 | 2015-12-31 | Ball worm reducer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443661A (en) * | 2015-12-31 | 2016-03-30 | 刘国青 | Ball screw worm speed reducer |
| WO2018120542A1 (en) * | 2016-12-29 | 2018-07-05 | 成都中良川工科技有限公司 | Transmission reduction device |
| CN108916341A (en) * | 2018-08-07 | 2018-11-30 | 刘国青 | A kind of flexibility steel ball commutation cycle device |
| CN114590735A (en) * | 2022-03-04 | 2022-06-07 | 淮安市江减传动机械有限公司 | High-precision ball screw elevator |
-
2015
- 2015-12-31 CN CN201521140324.1U patent/CN205315617U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443661A (en) * | 2015-12-31 | 2016-03-30 | 刘国青 | Ball screw worm speed reducer |
| WO2018120542A1 (en) * | 2016-12-29 | 2018-07-05 | 成都中良川工科技有限公司 | Transmission reduction device |
| CN108916341A (en) * | 2018-08-07 | 2018-11-30 | 刘国青 | A kind of flexibility steel ball commutation cycle device |
| CN108916341B (en) * | 2018-08-07 | 2021-07-02 | 刘国青 | Flexible steel ball reversing circulating device |
| CN114590735A (en) * | 2022-03-04 | 2022-06-07 | 淮安市江减传动机械有限公司 | High-precision ball screw elevator |
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