CN220416142U - Automatic gap eliminating device for screw rod nut - Google Patents
Automatic gap eliminating device for screw rod nut Download PDFInfo
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- CN220416142U CN220416142U CN202321789166.7U CN202321789166U CN220416142U CN 220416142 U CN220416142 U CN 220416142U CN 202321789166 U CN202321789166 U CN 202321789166U CN 220416142 U CN220416142 U CN 220416142U
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- nut
- thread sleeve
- external thread
- pressure spring
- sleeve
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- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims 4
- 238000003379 elimination reaction Methods 0.000 claims 4
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model provides an automatic gap eliminating device for a screw rod and a nut, which comprises a screw rod, a nut main body, an external thread sleeve I and an external thread sleeve II, wherein the nut main body is arranged on the screw rod, the nut main body is connected with the external thread sleeve I, and the external thread sleeve I is connected with the external thread sleeve II; the first external thread sleeve is sleeved with a pressure spring, and the pressure spring is connected with the nut main body; limiting nuts are arranged on the first external thread sleeve and the second external thread sleeve, and the first external thread sleeve and the second external thread sleeve are arranged on the screw rod; the limiting nut comprises a first nut, a bearing and a second nut, wherein the first nut is connected with the outer ring of the bearing, and the inner ring of the bearing is connected with the second nut; the first nut is arranged on the first external thread sleeve, and the second nut is arranged on the second external thread sleeve. The utility model can restrict the first nut and the second nut mutually, prevent the loosening, lock the pressure spring, ensure the stability of the pressure spring, and tightly fix the nut main body and the screw rod together, thereby eliminating the gap between the nut main body and the screw rod.
Description
Technical Field
The utility model belongs to the field of screw nuts, and particularly relates to an automatic gap eliminating device for screw nuts.
Background
It is known that in the use process of the screw nut, gaps are easily generated between the screw and the nut due to various factors, and if the generated gaps are not eliminated, the accuracy and stability of the whole operation are affected.
Through retrieving, a compact anti-backlash nut as disclosed in Chinese patent No. CN 208295066U comprises a screw rod, a nut body, a pressure spring, an adjusting ring, an adjusting nut and a connecting groove, wherein the outer side of the screw rod is connected with the nut body in a meshed manner, connecting grooves which are symmetrical to each other are formed in two sides of the nut body, and the pressure spring is arranged on the outer side of the nut body. By arranging the adjusting ring between the nut body and the adjusting nut and arranging the pressure spring between the adjusting ring and the nut body, the prestress of the nut body and the adjusting nut can be controlled by the adjusting ring, so that the outward acting force of the nut body and the adjusting ring is ensured, the inward acting force of the adjusting nut and the nut body is ensured, and the gap between the nuts on the screw rod is eliminated; the connecting groove on the nut body and the connecting block on the adjusting nut are connected in a clamping mode, so that the connection between the adjusting nut and the nut body is more convenient and stable, and the accuracy of eliminating gaps of the nut is enhanced.
However, when the screw rod and the nut body vibrate in the using process, the adjusting ring is easy to loose, and the phenomenon that the pressure spring cannot be locked is easy to cause, so that the integral anti-backlash effect is affected.
Therefore, the utility model of the automatic gap eliminating device for the screw nut is very necessary.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an automatic gap eliminating device for a screw nut, which adopts the following technical scheme: the automatic gap eliminating device for the screw rod nut comprises a screw rod, a nut main body, an external thread sleeve I and an external thread sleeve II, wherein: the nut body is arranged on the screw rod in a threaded fit manner, one end of the nut body is fixedly connected with one end of the first external thread sleeve, and the other end of the first external thread sleeve is fixedly connected with one end of the second external thread sleeve; the first external thread sleeve is sleeved with a pressure spring, and one end of the pressure spring is fixedly connected with one side of the nut main body in a pulling-inserting manner; the first external thread sleeve and the second external thread sleeve are provided with limit nuts through threaded fit, and the first external thread sleeve and the second external thread sleeve are provided with screw rods through threaded fit; the limiting nut comprises a first nut, a bearing and a second nut, one end of the first nut is fixedly connected with one end of an outer ring of the bearing, and one end of an inner ring of the bearing is fixedly connected with one end of the second nut; the first nut is arranged on the first external thread sleeve in a clockwise thread fit manner, and the second nut is arranged on the second external thread sleeve in a counterclockwise thread fit manner; the pressure spring is positioned between the nut main body and the first nut.
Preferably, a plurality of holes for limiting the pressure spring are formed in one side of the joint of the nut main body and the first external thread sleeve, the holes are arranged in an annular array shape with the first external thread sleeve as the center, and the holes are fixedly connected with one end of the pressure spring in a pulling-inserting mode.
Preferably, the peripheral surfaces of the first external thread sleeve and the second external thread sleeve are provided with three identical notches in a penetrating mode in an annular array mode, and the peripheral surface of one end, far away from the first external thread sleeve, of the second external thread sleeve is provided with a ring groove; the inner diameter of the first external thread sleeve is the same as the inner diameter of the second external thread sleeve and the inner diameter of the nut main body, and the diameter of the first external thread sleeve is larger than the diameter of the second external thread sleeve; the first external thread sleeve and the second external thread sleeve are coaxial with the nut main body; the diameter of the external thread sleeve II is smaller than the inner diameter of the first nut, and the diameter of the external thread sleeve I is larger than the inner diameter of the second nut.
Preferably, a rubber anti-drop ring is fixedly arranged in the ring groove, and is coaxial with the ring groove, and the diameter of the rubber anti-drop ring is larger than that of the second external thread sleeve.
Preferably, a limiting sleeve is fixedly arranged at one end of the pressure spring, a plurality of clamping teeth are fixedly arranged on the peripheral surface of the limiting sleeve in an annular array shape, and the clamping teeth are inserted into corresponding holes; the limiting sleeve is sleeved on the first external thread sleeve and is coaxial with the external thread sleeve.
Compared with the prior art, the utility model has the advantages that:
according to the utility model, in the using process, the first nut and the first external thread sleeve are connected in a clockwise thread fit manner, the second nut and the second external thread sleeve are connected in a anticlockwise thread fit manner, and the bearing is matched, so that independent rotation between the first nut and the second nut can not be influenced when the pressure spring is regulated through the limit nut, and therefore, when the screw nut and the nut main body vibrate, the first nut and the second nut can be mutually restricted, the loosening phenomenon is avoided, and the pressure spring is effectively locked, so that the whole has a better gap eliminating effect.
Drawings
Fig. 1 is a schematic view of the overall structure of the present utility model.
Fig. 2 is a schematic view of the explosion-proof assembly structure of the nut body, the pressure spring, the stop nut and the rubber ring according to the present utility model.
In the figure:
the nut comprises a screw rod 1, a nut main body 2, a eyelet 21, a first external thread sleeve 3, a second external thread sleeve 4, a notch 5, a ring groove 6, a pressure spring 7, a limit nut 8, a first nut 81, a bearing 82, a second nut 83 and a rubber anti-drop ring 9.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution of the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
In the description of the embodiments, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model is further described below with reference to the accompanying drawings:
example 1
Referring to fig. 1-2, an automatic gap eliminating device for a screw-nut comprises a screw 1, a nut body 2, an external thread sleeve one 3 and an external thread sleeve two 4, wherein: the nut body 2 is arranged on the screw rod 1 through threaded fit, one end of the nut body 2 is fixedly connected with one end of the first external thread sleeve 3, the other end of the first external thread sleeve 3 is fixedly connected with one end of the second external thread sleeve 4, and the nut body 2 is conveniently connected with the limit nut 8 through the arrangement of the first external thread sleeve 3 and the second external thread sleeve 4, so that the locking force between the screw rod 1 and the nut body 2 is improved; the first external thread sleeve 3 is sleeved with a pressure spring 7, the prestress between the nut main body 2 and the limit nut 8 is conveniently adjusted through the arrangement of the pressure spring 7, and one end of the pressure spring 7 is fixedly connected with one side of the nut main body 2 in a pulling-inserting manner; the first external thread sleeve 3 and the second external thread sleeve 4 are provided with limit nuts 8 in a threaded fit manner, the compression degree of the pressure spring 7 can be adjusted through the arrangement of the limit nuts 8, and the first external thread sleeve 3 and the second external thread sleeve 4 are provided on the screw rod 1 in a threaded fit manner; the limiting nut 8 comprises a first nut 81, a bearing 82 and a second nut 83, one end of the first nut 81 is fixedly connected with one end of an outer ring of the bearing 82, one end of an inner ring of the bearing 82 is fixedly connected with one end of the second nut 83, and the first nut 81 and the second nut 83 can be independently rotated through the arrangement of the bearing 82, so that the first nut 81 and the second nut 83 are conveniently connected with the corresponding first external thread sleeve 3 and the corresponding second external thread sleeve 4; the first nut 81 is arranged on the first external thread sleeve 3 in a clockwise thread fit manner, the second nut 83 is arranged on the second external thread sleeve 4 in a anticlockwise thread fit manner, and the first nut 81 and the second nut 83 can be mutually restricted when the screw rod 1 and the nut main body 2 vibrate through the arrangement between the first nut 81 and the first external thread sleeve 3 and the arrangement between the second nut 83 and the second external thread sleeve 4, so that the loosening phenomenon is prevented; the pressure spring 7 is located between the nut body 2 and the nut one 81.
One side of nut main part 2 and the first 3 junction of external screw thread sleeve has seted up a plurality of aperture 21 that are used for restricting pressure spring 7, and aperture 21 is annular array form setting for the center with first 3 of external screw thread sleeve, should aperture 21 pull out plug fixed connection with pressure spring 7 one end, through setting up between aperture 21 and the pressure spring 7, can spacing pressure spring 7, when screw rod 1 and nut main part 2 take place the vibration, prevent pressure spring 7 to take place to rotate, thereby reduce the friction takes place between pressure spring 7 and the first 3 of external screw thread sleeve, increase pressure spring 7 and the life of first 3 of external screw thread sleeve.
The peripheral surfaces of the first external thread sleeve 3 and the second external thread sleeve 4 are provided with three identical notches 5 in a penetrating mode in an annular array mode, the notches 5 are matched with the limit nuts 8, locking force between the screw rod 1 and the nut main body 2 and between the first external thread sleeve 3 and the second external thread sleeve 4 can be improved, and therefore gaps between the screw rod 1 and the nut main body 2 are eliminated, the whole is more stable in operation, and annular grooves 6 are formed in the peripheral surfaces of one ends, far away from the first external thread sleeve 3, of the second external thread sleeve 4; the inner diameter of the first external thread sleeve 3 is the same as that of the second external thread sleeve 4 and the nut main body 2, and the diameter of the first external thread sleeve 3 is larger than that of the second external thread sleeve 4; the first external thread sleeve 3 and the second external thread sleeve 4 are coaxial with the nut main body 2; the diameter of the external thread sleeve II 4 is smaller than the inner diameter of the first nut 81, and the diameter of the external thread sleeve I3 is larger than the inner diameter of the second nut 83.
A rubber anti-drop ring 9 is fixedly arranged in the ring groove 6, the rubber anti-drop ring 9 and the ring groove 6 are coaxial, and the diameter of the rubber anti-drop ring 9 is larger than that of the second external thread sleeve 4; through the arrangement of the annular groove 6 and the rubber anti-falling ring 9, the limit nut 8 can be prevented from falling off from the first external thread sleeve 3 and the second external thread sleeve 4.
One end of the pressure spring 7 is fixedly provided with a limiting sleeve 71, the peripheral surface of the limiting sleeve 71 is fixedly provided with a plurality of clamping teeth 72 in an annular array shape, the clamping teeth 72 are inserted into corresponding holes 21, and the arrangement of the limiting sleeve 71, the clamping teeth 72 and the holes 21 facilitates the fixation between the pressure spring 7 and the nut main body 2, prevents the pressure spring 7 from rotating on the first external thread sleeve 3, thereby ensuring the stability of the pressure spring 7 and reducing friction between the pressure spring 7 and the first external thread sleeve 3; the limiting sleeve 71 is sleeved on the first external thread sleeve 3 and is coaxial with the first external thread sleeve 3.
In this embodiment, when in use, the pressure spring 7 is sleeved on the first external thread sleeve 3, the latch 72 is inserted into the corresponding hole 21, then the limit nut 8 is installed, the first nut 81 is sleeved on the second external thread sleeve 4, when one end of the second external thread sleeve 4 is contacted with one end of the second nut 83, due to the arrangement of the bearing 82, the second nut 83 can be independently rotated anticlockwise, the second nut 83 is connected with the second external thread sleeve 4 in a matched manner through threads, in this way, in the process of rotating the second nut 83, the first nut 81 is driven to move towards one end of the first external thread sleeve 3 until the first nut 81 is contacted with one end of the first external thread sleeve 3, at this time, the first nut 81 can be rotated clockwise, and the second nut 83 is rotated anticlockwise while the first nut 81 is rotated, the first nut 81 is also connected with the first external thread sleeve 3 in a matched manner, then the limit nut 8 is moved towards one side of the nut body 2 as a whole, the pressure spring 7 can be compressed, thus achieving the effect of adjusting the prestress between the nut body 2 and the limit nut 8, and finally the screw nut 2 can be matched with the screw 1; in this way, since the first nut 81 is connected with the first external thread sleeve 3 clockwise, the second nut 83 is connected with the second external thread sleeve 4 anticlockwise, and vibrations are generated in the using process, the first nut 81 and the second nut 83 can be restrained mutually, the loosening phenomenon is prevented, the pressure spring 7 is effectively locked, the stability of the pressure spring 7 is ensured, the nut main body 2 and the screw rod 1 are tightly fixed together, and therefore, the gap between the nut main body 2 and the screw rod 1 is eliminated.
By utilizing the technical scheme of the utility model or under the inspired by the technical scheme of the utility model, a similar technical scheme is designed by a person skilled in the art, so that the technical effects are achieved, and the technical scheme falls into the protection scope of the utility model.
Claims (5)
1. An automatic gap eliminating device for a screw nut is characterized in that: including lead screw (1), nut main part (2), external screw thread sleeve one (3) and external screw thread sleeve two (4), wherein: the nut body (2) is arranged on the screw rod (1) in a threaded fit manner, one end of the nut body (2) is fixedly connected with one end of the first external thread sleeve (3), and the other end of the first external thread sleeve (3) is fixedly connected with one end of the second external thread sleeve (4); the first external thread sleeve (3) is sleeved with a pressure spring (7), and one end of the pressure spring (7) is fixedly connected with one side of the nut main body (2) in a pulling-inserting manner; the first external thread sleeve (3) and the second external thread sleeve (4) are provided with limit nuts (8) through threaded fit, and the first external thread sleeve (3) and the second external thread sleeve (4) are provided with a screw rod (1) through threaded fit; the limiting nut (8) comprises a first nut (81), a bearing (82) and a second nut (83), one end of the first nut (81) is fixedly connected with one end of an outer ring of the bearing (82), and one end of an inner ring of the bearing (82) is fixedly connected with one end of the second nut (83); the first nut (81) is installed on the first external thread sleeve (3) in a clockwise threaded fit manner, and the second nut (83) is installed on the second external thread sleeve (4) in a counterclockwise threaded fit manner; the pressure spring (7) is located between the nut body (2) and the nut I (81).
2. A lead screw nut automatic gap elimination apparatus according to claim 1, wherein: a plurality of holes (21) for limiting the pressure spring (7) are formed in one side of the joint of the nut main body (2) and the first external thread sleeve (3), the holes (21) are arranged in an annular array shape with the first external thread sleeve (3) as the center, and the holes (21) are fixedly connected with one end of the pressure spring (7) in a pulling-inserting mode.
3. A lead screw nut automatic gap elimination apparatus according to claim 2, wherein: the peripheral surfaces of the first external thread sleeve (3) and the second external thread sleeve (4) are in annular array shape, three identical notches (5) are formed in a penetrating mode, and annular grooves (6) are formed in the peripheral surface of one end, far away from the first external thread sleeve (3), of the second external thread sleeve (4); the inner diameter of the first external thread sleeve (3) is the same as the inner diameter of the second external thread sleeve (4) and the inner diameter of the nut main body (2), and the diameter of the first external thread sleeve (3) is larger than the diameter of the second external thread sleeve (4); the first external thread sleeve (3) and the second external thread sleeve (4) are coaxial with the nut main body (2); the diameter of the external thread sleeve II (4) is smaller than the inner diameter of the nut I (81), and the diameter of the external thread sleeve I (3) is larger than the inner diameter of the nut II (83).
4. A lead screw nut automatic gap elimination apparatus according to claim 3, wherein: the annular groove (6) is fixedly provided with a rubber anti-falling ring (9), the rubber anti-falling ring (9) and the annular groove (6) are coaxial, and the diameter of the rubber anti-falling ring (9) is larger than that of the external thread sleeve II (4).
5. A lead screw nut automatic gap elimination apparatus according to claim 3, wherein: one end of the pressure spring (7) is fixedly provided with a limit sleeve (71), the peripheral surface of the limit sleeve (71) is fixedly provided with a plurality of clamping teeth (72) in an annular array shape, and the clamping teeth (72) are inserted into corresponding holes (21); the limiting sleeve (71) is sleeved on the first external thread sleeve (3) and is coaxial with the first external thread sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321789166.7U CN220416142U (en) | 2023-07-10 | 2023-07-10 | Automatic gap eliminating device for screw rod nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321789166.7U CN220416142U (en) | 2023-07-10 | 2023-07-10 | Automatic gap eliminating device for screw rod nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220416142U true CN220416142U (en) | 2024-01-30 |
Family
ID=89654752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321789166.7U Active CN220416142U (en) | 2023-07-10 | 2023-07-10 | Automatic gap eliminating device for screw rod nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220416142U (en) |
-
2023
- 2023-07-10 CN CN202321789166.7U patent/CN220416142U/en active Active
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