CN201448410U - Screw driving device - Google Patents
Screw driving device Download PDFInfo
- Publication number
- CN201448410U CN201448410U CN2009200438307U CN200920043830U CN201448410U CN 201448410 U CN201448410 U CN 201448410U CN 2009200438307 U CN2009200438307 U CN 2009200438307U CN 200920043830 U CN200920043830 U CN 200920043830U CN 201448410 U CN201448410 U CN 201448410U
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- Prior art keywords
- nut
- screw
- bearing
- screw rod
- utility
- 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 discloses a screw driving device, which comprises a screw the two ends of which are locked, a nut sleeved on the screw, and a rotary driving mechanism which allows the nut to axially move along the screw, wherein the rotary driving mechanism comprises a driving gear and a driven gear which are meshed with each other, and the driven gear is fixedly arranged on the nut. The utility model has the advantages of small volume, high rigidity, convenient installation, high-speed feed, accurate shift and improved processing precision, and a machine tool has no vibration, low noise and stable operation in the working process.
Description
Technical field
The utility model relates to a kind of mechanical transmission, is a kind of helicoidal gear specifically.
Background technique
In mechanical transmission, it is power screw that a kind of transmission is arranged, and generally be that screw rod rotates, and nut does not rotate, it is reciprocating along the guide rail of the axis of screw rod and member that nut is only being carried member on the back, and this kind of drive is widely used in the short middle-size and small-size lathe of shift motion.Along with scientific technological advance, long stroke large size machine tool are universal.When adopting the above-mentioned kind of drive, the length of screw rod must satisfy the length of lathe shift motion.The long more obvious bending of screw rod is just serious more, and screw rod will produce high vibration when high speed rotating, causes the stationarity of machine tool motion to descend, and has a strong impact on machining accuracy, poor rigidity.
The model utility content
Goal of the invention: the purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of friction to be provided, to move steadily, improve machining accuracy and the good helicoidal gear of transmission rigidity.
Technological scheme: in order to solve the problems of the technologies described above, the technological scheme that the utility model adopted is: a kind of helicoidal gear, this device comprise the screw rod of two ends locking, the rotating actuator that is enclosed within the nut on the screw rod and nut is moved along screw axial.
Described rotating actuator comprises intermeshing driving gear and driven gear, and driven gear is fixedly mounted on the nut.
In order to reduce friction, on described nut, be set with bearing, nut and Bearing Installation are in bearing housing, and bearing housing is fixedlyed connected with mobile body.
Suit locking nut on described nut right-hand member screw thread is in order to adjust the coupling mechanism force of bearing like this.
Oil sealing is installed at two ends at described bearing housing, can prevent oil leak like this.
Working principle of the present utility model: when motor rotates, driving gear together rotates with motor output shaft, and drive driven gear and in the bearing trepanning, rotate by bearing together with nut, it is reciprocating along the guide rail of the axis of screw rod and member to have realized that nut is being carried mobile body on the back by bearing, bearing housing.
Beneficial effect: compare with prior art, the utility model has the advantages that can make lathe in the course of the work friction, low noise, motion is steady, volume is little, high rigidity, easy for installation, can realize that high speed feed, displacement are accurately and improve machining accuracy.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that the A of Fig. 1 is to structural representation.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, the utility model helicoidal gear, screw rod 3 is installed and with screw rod 3 lockings between left socle 2 and right support 22, left socle 2 and right support 22 are fixed on the lathe base, nut 4 is enclosed within on the screw rod 3, driven gear 6 is fixed on nut 4 flange ends by screw 5 and meshes with driving gear 7, driving gear 7 is by swelling cover 8, clamping sleeve 10 and screw 9 are fixed on the output shaft of motor 1. and motor 1 is fixed on the housing 11, housing 11 is fixed on the bottom 12, bottom 12 is fixed on the mobile body, mobile body is installed on the guide rail of lathe. and two bearings 16 is fitted on nut 4 cylindricals, two back-up rings 20 are mounted on two bearings 16 outsides and are sleeved on nut 4 cylindricals. between inboard, two bearings 16 outer ring, mount spacer ring 15, bearing housing 14 is installed on the cylindrical of two bearings 16, and it is fixing by screw 13 with mobile body, bearing trim ring 17 is fixed on bearing housing 14 right-hand members by screw 18, the small end of bearing trim ring 17 and bearing 16 right-hand members are fitted, and compress two bearings 16 outer rings and bearing spacer 15, oil sealing 23 is installed in the outside, two ends of bearing housing 14, capping bearing 16 two ends prevent oil leak. locking nut 21 is sleeved on the nut 4 right-hand member screw threads, adjusts the coupling mechanism force of bearing 16 inner rings by back-up ring 20.
When motor 1 rotates, driving gear 7 together rotates with motor 1 output shaft, and drive driven gear 6 and in bearing housing 14 holes, rotates by bearing 16 together with nut 4, having realized overlapping 14 by bearing 16, bearing 5 by nut 4, to carry mobile body on the back reciprocating along the axis of machine tool guideway and screw rod 3.
The above only is a preferred implementation of the present utility model.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model principle, can also make some modification and improvement, these also should be considered as belonging to protection domain of the present utility model.
Claims (5)
1. helicoidal gear is characterized in that: this device comprise two ends locking screw rod (3), be enclosed within the nut (4) on the screw rod (3) and make nut (4) along the axially movable rotating actuator of screw rod (3).
2. helicoidal gear according to claim 1 is characterized in that: described rotating actuator comprises intermeshing driving gear (7) and driven gear (6), and driven gear (6) is fixedly mounted on the described nut (4).
3. helicoidal gear according to claim 1 and 2 is characterized in that: be set with bearing (16) on described nut (4), nut (4) and bearing (16) are installed in the bearing housing (14), and bearing housing (14) is fixedlyed connected with mobile body.
4. helicoidal gear according to claim 3 is characterized in that: suit locking nut (21) on described nut (4) right-hand member screw thread.
5. helicoidal gear according to claim 3 is characterized in that: oil sealing (23) is installed at the two ends at described bearing housing (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200438307U CN201448410U (en) | 2009-05-25 | 2009-05-25 | Screw driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200438307U CN201448410U (en) | 2009-05-25 | 2009-05-25 | Screw driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201448410U true CN201448410U (en) | 2010-05-05 |
Family
ID=42553126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200438307U Expired - Fee Related CN201448410U (en) | 2009-05-25 | 2009-05-25 | Screw driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201448410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939551A (en) * | 2014-03-18 | 2014-07-23 | 陕西汉江机床有限公司 | Ball screw pair with nut main driving |
-
2009
- 2009-05-25 CN CN2009200438307U patent/CN201448410U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939551A (en) * | 2014-03-18 | 2014-07-23 | 陕西汉江机床有限公司 | Ball screw pair with nut main driving |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20120525 |