CN2446332Y - Ball nut - Google Patents
Ball nut Download PDFInfo
- Publication number
- CN2446332Y CN2446332Y CN 00255050 CN00255050U CN2446332Y CN 2446332 Y CN2446332 Y CN 2446332Y CN 00255050 CN00255050 CN 00255050 CN 00255050 U CN00255050 U CN 00255050U CN 2446332 Y CN2446332 Y CN 2446332Y
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- CN
- China
- Prior art keywords
- ball nut
- shell
- ball
- threaded collar
- back flash
- 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 ball nut, the purpose of which is to simplify the production of the ball nut of a ball screw and lower the manufacture cost of the ball nut; in order to reach the purpose of lowering manufacture cost and the requirement that the capability that the ball nut endures the loading from a ball to does not remarkably lowered, the utility model utilizes the design of the ball nut with double layers of materials; the production of the inner layer of a spiral groove utilizes metal materials or other materials with good intensity, and the production of outer layer utilizes plastic materials to lower the production cost. Because plastic materials are easy to be made in an injection molding method, the utility model has the advantages of convenient production and low cost, and therefore, the production cost of the ball nut can be greatly lowered.
Description
The utility model is the ball nut about a kind of ball screw, and particularly a kind of internal layer is made with metallic material, and the ball nut that the outside coats with plastic materials.
Ball screw is the industrial element that has used for many years.Existing ball screw mainly comprises a screw axis, a ball nut and many balls; Wherein the outside of screw axis has spiral chute, and ball nut comprises the nut body of a hollow shape and the accessory that refluxes for ball-recirculation; The inboard of nut body has the spiral chute of arranging in pairs or groups mutually with the spiral chute of screw axis, and and the mutual fit of screw axis; Many balls are then between between the spiral chute of screw axis and nut body, and circulating rolling in the accessory that refluxes for ball-recirculation, and the rolling by ball makes between screw axis and ball nut rotates mutually.The nut body of this existing ball nut is all with the metallic material manufacturing, need processing and heat treatment manufacture process through complexity, and also be not easy in the accessory manufacturing that the confession ball-recirculation that needs refluxes, the manufacture cost height, this causes ball screw generally to be positioned as expensive transmission component, and can't spread to the driving mechanism use of general low price.
The utility model main purpose is to provide a kind of ball nut, it simplifies the ball nut manufacturing of ball screw, reduce the manufacture cost of ball nut, the price of ball screw is reduced, so that the driving mechanism that ball screw can spread to for general low price uses.
The utility model reexamines the ball nut function in the existing ball screw, must have the spiral chute that matches with screw axis in the ball nut, come transferring power and need have ball in the spiral chute, and for but the ball Infinite Cyclic is rolled, need have structure in the ball nut for the ball reflux cycle, this structure is made as using the machining mode, and then fabricating cost is obviously higher, therefore the utility model proposes to use the plastics shoot mode to make to reduce fabricating cost; Because in the spiral shell pearl nut must be with the ball transferring power, and the surface of contact between the spiral chute of ball and ball nut is similar to and contacts, the point contact is because area of contact is little, and bigger stress concentration phenomenon is arranged on the central point, the contact pressure at the center of its point of contact is very big, so for to make ball nut can keep original performance, the spiral chute that bears the ball load of ball nut of the present utility model is partly still made with metallic material or other high-intensity hard materials, so that the spiral chute that bears the ball load of ball nut of the present utility model can bear enough loads.
The purpose of this utility model is achieved in that the purpose that reduces fabricating cost for reaching, and ball nut bear from the load carrying capacity of ball under the requirement of not obvious reduction, the utility model uses the design of the ball nut of double layer material, has the spiral fluted internal layer, because need to contact with ball and need to transmit load, metallic material or the good material of other intensity are used in the zone of this internal layer; And it is outer because the interior required load that bears of unit area is less, thus use plastic materials to make, to reduce fabricating cost.Make with injection molding method because plastic materials is as easy as rolling off a log, easy to make and cost is low, so can significantly reduce the fabricating cost of ball nut.
Be convenient further understanding feature of the present utility model and technology contents, please consult following relevant preferred embodiment of the present utility model in detail, however this embodiment and graphic only for explanation and with reference to usefulness, but not in order to the utility model is done any restriction.
See also the detailed description and the accompanying drawing thereof of following relevant the utility model one preferred embodiment, can further understand technology contents of the present utility model and purpose effect thereof; Relevant this embodiment's accompanying drawing is:
Fig. 1 is the stereogram of first example of ball nut of the present utility model
Fig. 2 is the stereogram of the threaded collar of Fig. 1
Fig. 3 is the stereogram of the shell of Fig. 1
Fig. 4 is the A-A partial sectional view of Fig. 1
Fig. 5 is the stereogram of the backflow pressing plate of Fig. 1
Fig. 6 is the stereogram of second example of ball nut of the present utility model
Fig. 7 is the stereogram of the threaded collar of Fig. 6
Fig. 8 is the stereogram of the shell of Fig. 6
Fig. 9 is the stereogram of the end casing of Fig. 6
Figure 10 is the stereogram of the 3rd example of ball nut of the present utility model
Figure 11 is the stereogram of the threaded collar of Figure 10
Figure 12 is the stereogram of the shell of Figure 10
Figure 13 is the stereogram of the 4th example of ball nut of the present utility model
Figure 14 is the stereogram of the threaded collar of Figure 13
Figure 15 is the stereogram of the shell of Figure 13
The major component conventional letter:
1 threaded collar, 2 shells
3 backflow pressing plates, 4 end casings
5 screws, 11 spiral chutes
12 escape groove 13 groovings
14 return ports, 15 slotted holes
21 flanges, 22 external screw threads
23 back flashes 24 protrude piece
25 screws, 26 extension blocks
27 return ports, 31 fixed holes
32 protrude fixture block 41 guide slots
211 fixed holes, 241 back flashes
261 ball stop parts, 262 ball guiding faces
321 ball guiding faces
With reference to accompanying drawing, in conjunction with the embodiments, the utility model is explained in detail.
Fig. 1 is the stereogram of first example of ball nut of the present utility model, ball nut of the present utility model mainly comprises a threaded collar 1 and the shell 2 with the plastic materials manufacturing with the metal making, threaded collar 1 is a hollow piece, its internal diameter is provided with spiral chute 11, and spiral chute 11 usefulness are rolled for the ball of ball nut; Outside socket one shell 2 of threaded collar 1, shell 2 is fixedlyed connected with 1 of threaded collar, Placement except with the plastics shoot mode threaded collar 1 outside direct injection shell 2, also can use the ultrasonic wave adhesion system or directly threaded collar 1 and shell 2 are mutually permanently connected with Bond; In order to increase the effect that is connected of threaded collar 1 and 2 on shell, in the outside of threaded collar 1 concavo-convex striped (not shown) can be set, with the adhesive strength after increasing threaded collar 1 and shell 2 being connected.The external diameter of shell 2 is provided with external screw thread 22.The design of Fig. 1 is provided with backflow pressing plate 3 above shell 2, the pressing plate (3) that wherein refluxes is made for the plastics ejection formation; Backflow pressing plate 3 is provided with fixed hole 31, and available screw passes fixed hole 31 backflow pressing plate 3 and shell 2 are combined.In conjunction with after ball nut, near the spiral chute 11 of threaded collar 1, ball stop part 261 is arranged, ball stop part 261 continues to move along spiral chute 11 in order to stop the ball in the spiral chute 11.
Embodiment for clearer this explanation of understanding, the stereogram of the threaded collar 1 of Fig. 2 displayed map 1, Fig. 3 then shows the stereogram of shell 2, what threaded collar 1 was provided with strip escapes groove 12, escape the direction setting of groove 12, do not interfere the spiral chute that supplies the ball scroll zones so that escape groove 12 along spiral chute 11; And the shell 2 of Fig. 3 corresponding threaded collar 1 escape be provided with extension block 26 on groove 12 positions, after shell 2 and threaded collar 1 combination, extension block 26 snaps into to be escaped among the groove 12, has ball stop part (261) on the extension block 26,261 groove faces that protrude from spiral chute 11 of ball stop part, and can stop ball process in the ball screw, and ball guiding face 262 is in order to the guiding ball, makes ball leave spiral chute 11 and moves along ball guiding face 262.Be provided with back flash 23 above shell 2, back flash 23 is communicated with the ball guiding face 262 of two extension blocks 26, so that the ball of 11 of spiral chutes refluxes through ball guiding face 262; Screw 25 then is the usefulness that is connected with backflow pressing plate 3.
Fig. 4 is the A-A partial sectional view of Fig. 1, shows among the figure that screw 5 passes in the screw 25 that fixed hole 31 is locked in shell 2, and backflow pressing plate 3 and shell 2 are combined; After backflow pressing plate 3 and shell 2 combinations, the ball guiding face 321 of backflow pressing plate 3 and the back flash 23 of shell 2 are combined into the passage of the similar circle of a section jointly, so that ball can pass through; In addition because screw 25 just in time is located on the extension block 26, though so shell 2 with the plastic materials manufacturing, because of effective tooth number is many, the coupling mechanism force of screw 5 is still enough.
Fig. 5 is the stereogram of the backflow pressing plate of Fig. 1, and the below of backflow pressing plate 3 is provided with protrudes fixture block 32, protrudes the ball guiding face 321 that fixture block 32 has arc, refluxes in order to the guiding ball.After backflow pressing plate 3 and shell 2 combinations, protrude fixture block 32 and be stuck in the back flash 23 of shell 2, ball guiding face 321 then makes the passages of ball backflow with the back flash 23 common formation one of shell 2.
Fig. 6 is the stereogram of second example of ball nut of the present utility model, and this embodiment's ball nut uses the usefulness of the both ends of the surface of threaded collar 1 as the ball backflow.Have the threaded collar 1 that metal makes in the inboard of ball nut and be a shell 2 with the plastic materials manufacturing it outside, the outside socket shell 2 of threaded collar 1, shell 2 are fixedlyed connected with 1 of threaded collar; Shell 2 among the figure is provided with flange 21, and flange 21 is provided with fixed hole 211, and fixed hole 211 can make things convenient for ball nut and outside mechanism's combination.On the both ends of the surface of shell 2, respectively engage an end casing 4, in the stereogram of Fig. 6, because for showing the relativeness of shell 2 and threaded collar 1, the end casing in left side is temporarily removed, be provided with several by the end face that can see shell 2 among Fig. 6 and protrude piece 24, shell 2 is provided with return port (27) along its central axis direction, protruding piece 24 is provided with for the rotating back flash 241 of ball, at each back flash 241 other return port 27 that then respectively are provided with, back flash 241 connects return port 27, return port 27 is in order to provide ball through hole backflow thus, the diameter of return port 27 is greater than the diameter of ball, and the ball in spiral chute 11 can be via the other end of back flash 241 that protrudes piece 24 and return port 27 sensible threaded collar 1.
The stereogram of the threaded collar 1 of Fig. 7 displayed map 6, Fig. 8 then shows the stereogram of shell 2, the end face of threaded collar 1 is provided with grooving 13, grooving 13 is positioned at the two ends of spiral chute 11, the function of grooving 13 is to reduce the shared space of ball backflow, but as do not mind the total length that increases ball nut, then grooving 13 also can omit to save the cost of threaded collar 1 machining.
Fig. 9 is the stereogram of the end casing of Fig. 6, and end casing 4 is provided with guide slot 41, and when end casing 4 and shell 2 combinations, the one side that is provided with guide slot 41 is fitted on the end face of shell 2.And the back flash 241 of guide slot 41 and shell 2 is together to form a passage for the ball backflow.
Figure 10 is the stereogram of the 3rd example of ball nut of the present utility model, and this embodiment's ball nut uses the back flash 241 on the spiral chute 11 that ball is back in the adjacent spiral chute 11.The inboard of this ball nut be the metal threaded collar 1 of making and its outer be a shell 2 made from plastic materials, the outside socket shell 2 of threaded collar 1, and shell 2 is fixedlyed connected with 1 of threaded collar.
Be clear this embodiment's of understanding the threaded collar 1 and the structure of shell 2, Figure 11 shows the stereogram of the threaded collar 1 of Figure 10, and Figure 12 then shows the stereogram of shell 2.Threaded collar 1 is provided with return port 14, and return port 14 is crossed over and connected two adjacent spiral chutes 11, so that the ball on the spiral chute 11 can be back to adjacent spiral chute via the back flash in the return port 14 241 (with reference to Figure 10); On the internal diameter of shell 2, return port 14 places of matching thread ring 1 are provided with protrudes piece 24, protrudes piece 24 and gos deep in the return port 14, protrudes then to be provided with the back flash 241 that refluxes for ball on the piece 24, the width of back flash 241 is slightly larger than the diameter of ball, so that ball can reflux via back flash 241.Wherein protrude piece 24 and be the part of shell 2, have identical material with shell 2.
Figure 13 is the stereogram of the 4th example of ball nut of the present utility model, and this embodiment's ball nut uses the protrusion piece 24 of the bulk on the spiral chute 11 to be back in the adjacent spiral chute 11 for ball, protrudes the back flash 241 that has one or more on the piece 24.The inboard of this ball nut be the metal threaded collar 1 of making and its outer be a shell 2 made from plastic materials, the outside socket shell 2 of threaded collar 1, shell 2 is fixedlyed connected with 1 of threaded collar.
Be clear this embodiment's of understanding the threaded collar 1 and the structure of shell 2, Figure 14 shows the stereogram of the threaded collar 1 of Figure 13, and Figure 15 then shows the stereogram of shell 2.Threaded collar 1 is provided with slotted hole 15, and slotted hole 15 slightly is parallel to the central shaft of ball nut, and crosses over a few spiral chute 11; Slotted hole 15 places of matching thread ring 1 are provided with and protrude piece 24 on the internal diameter of shell 2, protruding piece 24 gos deep in the slotted hole 15, protrude and then be provided with the back flash 241 that several reflux for ball on the piece 24, back flash (241) connects two adjacent spiral chutes 11, so that the ball on the spiral chute 11 can be back to adjacent spiral chute via the back flash in the slotted hole 15 241.Wherein, the width of back flash 241 is greater than the diameter of ball, and protruding piece 24 is the part of shell 2, has identical material with shell 2.
In sum, compared with prior art, because the utility model is mainly by a threaded collar and shell institute Form, and the threaded collar structure of hollow is very simple, can use tubular material to machine at an easy rate, and outer Shell then can use the plastic injection mode to make, and manufacturing cost reduces much in terms of existing technologies, and makes The speed of making also significantly improves, and makes that ball nut is easier to be made in enormous quantities, and reduces cost.
Claims (24)
1. a ball nut is made up of threaded collar and shell; It is characterized in that: wherein the threaded collar (1) made from metal is a hollow piece, and its internal diameter is provided with spiral chute (11), and ball rolls in spiral chute (11); The outside of threaded collar (1) is socketed with the shell (2) with plastic production, fixedlys connected between shell (2) and threaded collar (1).
2. ball nut as claimed in claim 1 is characterized in that: be to be connected with the plastics injection molding method between shell (2) and threaded collar (1) wherein.
3. ball nut as claimed in claim 1 is characterized in that: be to be connected with the ultrasonic wave adhesion system between shell (2) and threaded collar (1) wherein.
4. ball nut as claimed in claim 1 is characterized in that: wherein the outside of threaded collar (1) is provided with concavo-convex striped.
5. ball nut as claimed in claim 1 is characterized in that: wherein the external diameter of shell (2) is provided with external screw thread (22).
6. ball nut as claimed in claim 1 is characterized in that: wherein shell (2) is provided with flange (21).
7. ball nut as claimed in claim 1 is characterized in that: wherein threaded collar (1) upper edge spiral chute (11) is provided with and escapes groove (12).
8. ball nut as claimed in claim 7 is characterized in that: wherein shell (2) is provided with extension block (26), and extension block (26) snaps in to be escaped among the groove (12).
9. ball nut as claimed in claim 8 is characterized in that: wherein have ball stop part (261) on the extension block (26).
10. ball nut as claimed in claim 8 is characterized in that: wherein the top of shell (2) is provided with back flash (23).
11. ball nut as claimed in claim 10 is characterized in that: wherein the width of back flash (241) is greater than the diameter of ball.
12. ball nut as claimed in claim 8 is characterized in that: wherein the top of shell (2) is provided with backflow pressing plate (3).
13. ball nut as claimed in claim 12 is characterized in that: the pressing plate that wherein refluxes (3) is penetrated the moulding manufacturing for plastics.
14. ball nut as claimed in claim 1 is characterized in that: wherein threaded collar (1) is provided with return port (14), and return port (14) connects adjacent spiral chute (11).
15. ball nut as claimed in claim 14 is characterized in that: wherein the internal diameter of shell (2) is provided with and protrudes piece (24), protrudes piece (24) and gos deep in the return port (14).
16. ball nut as claimed in claim 15 is characterized in that: wherein protrude piece (24) and be provided with back flash (241).
17. ball nut as claimed in claim 1 is characterized in that: wherein threaded collar (1) is provided with slotted hole (15).
18. ball nut as claimed in claim 17 is characterized in that: wherein the internal diameter of shell (2) is provided with and protrudes piece (24), and protrusion piece (24) gos deep in the slotted hole (15).
19. ball nut as claimed in claim 18 is characterized in that: wherein protrude piece (24) and be provided with back flash (241).
20. ball nut as claimed in claim 19 is characterized in that: wherein back flash (241) connects adjacent two spiral chutes (11), and the width of back flash (241) is greater than the diameter of ball.
21. ball nut as claimed in claim 20 is characterized in that: wherein protrude piece (24) and be provided with the back flash (241) of one or more.
22. ball nut as claimed in claim 1 is characterized in that: wherein shell (2) is provided with return port (27) along its central axis direction, and the diameter of return port (27) is greater than the diameter of ball.
23. ball nut as claimed in claim 22 is characterized in that: wherein the protrusion piece (24) on the end face of shell (2) is provided with back flash (241), and back flash (241) connects return port (27).
24. ball nut as claimed in claim 22 is characterized in that: wherein the end face of threaded collar (1) is provided with grooving (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00255050 CN2446332Y (en) | 2000-09-26 | 2000-09-26 | Ball nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00255050 CN2446332Y (en) | 2000-09-26 | 2000-09-26 | Ball nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2446332Y true CN2446332Y (en) | 2001-09-05 |
Family
ID=33612141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00255050 Expired - Fee Related CN2446332Y (en) | 2000-09-26 | 2000-09-26 | Ball nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2446332Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148185A (en) * | 2011-12-06 | 2013-06-12 | 上银科技股份有限公司 | Inner circulation type ball screw |
| CN106714992A (en) * | 2014-09-15 | 2017-05-24 | 舍弗勒技术股份两合公司 | Screw for ball screw and method for producing same |
| WO2019042111A1 (en) * | 2017-08-29 | 2019-03-07 | 苏世宽 | Non-invasive radio-frequency ablation system |
-
2000
- 2000-09-26 CN CN 00255050 patent/CN2446332Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148185A (en) * | 2011-12-06 | 2013-06-12 | 上银科技股份有限公司 | Inner circulation type ball screw |
| CN103148185B (en) * | 2011-12-06 | 2016-02-03 | 上银科技股份有限公司 | Internal-circulating ball screw |
| CN106714992A (en) * | 2014-09-15 | 2017-05-24 | 舍弗勒技术股份两合公司 | Screw for ball screw and method for producing same |
| US10486273B2 (en) | 2014-09-15 | 2019-11-26 | Schaeffler Technologies AG & Co. KG | Spindle for a ball screw and method for producing same |
| CN106714992B (en) * | 2014-09-15 | 2019-12-17 | 舍弗勒技术股份两合公司 | Screw for ball screw and method for producing same |
| WO2019042111A1 (en) * | 2017-08-29 | 2019-03-07 | 苏世宽 | Non-invasive radio-frequency ablation system |
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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: 20010905 Termination date: 20091026 |