CN212744914U - Anti-backlash nut assembly - Google Patents
Anti-backlash nut assembly Download PDFInfo
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- CN212744914U CN212744914U CN202020986014.6U CN202020986014U CN212744914U CN 212744914 U CN212744914 U CN 212744914U CN 202020986014 U CN202020986014 U CN 202020986014U CN 212744914 U CN212744914 U CN 212744914U
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Abstract
The application discloses clearance nut subassembly disappears, wherein clearance nut subassembly disappears includes a lead screw and a spacing subassembly, wherein spacing subassembly includes a nut flange, an elastic component and a locating part, the middle part of nut flange is equipped with a screw thread butt joint hole for threaded connection the lead screw, the outer wall of lead screw is provided with the screw thread along the axial, with screw thread butt joint hole threaded connection, the nut flange has one and supports the pressure surface, the locating part by for the nut flange is fixed, the one end of elastic component is supported and is pressed support the pressure surface, the other end of elastic component is supported and is pressed in the locating part.
Description
Technical Field
The utility model relates to a lead screw especially relates to a crack nut assembly disappears.
Background
In some precision instruments, it is necessary to achieve axial displacement with a lead screw. Such as in some woodworking machines or in some photo-imaging cutting devices, more or less lead screws are used. The surface of the screw spindle is provided with a thread in the direction in which it extends, the thread on the surface of the screw spindle being axially displaceable by screwing with a threaded hole in the nut and being rotatable relative to said nut.
However, due to the manufacturing process of the screw rod and the nut, when the screw rod and the nut are in threaded fit, a certain thread clearance exists, so that the screw rod and the nut are easy to shake along the axial direction. Thereby affecting the accuracy of the axial displacement of the screw.
There are some nut clearance eliminating devices in the prior art, such as the patent with the application number 200910038018.X, which propose a screw and nut clearance eliminating device, which can eliminate the clearance between the screw and the nut to some extent. The technical scheme is that a smaller small nut is arranged in a main nut, a screw rod is in threaded connection with the small nut, a spring is arranged between the small nut and the main nut and is in a compressed state, so that the small nut fixed on the screw rod is stressed in the axial direction, and a gap between the screw rod and the small nut is eliminated.
However, this solution has certain drawbacks, since the screw cooperates with a small nut which is mounted in the main nut and which is fixed laterally by means of a bolt. After the screw rod rotates for many times, the small nut can also slightly rotate, so that the bolt is easy to loosen, the small nut is enabled to synchronously rotate with the screw rod, and the distance of the screw rod moving along the axial direction after the screw rod rotates is smaller than the distance of the screw rod needing to move. In addition, the loosened small nut can swing in the main nut along the radial direction, so that the screw rod can deflect along the radial direction in the sliding process, and the precision of the whole screw rod is reduced.
Disclosure of Invention
An object of the utility model is to provide a gap nut assembly disappears, wherein gap nut assembly disappears not only can eliminate the clearance between lead screw and the nut, but also can prevent the lead screw is along radially rocking, and then guaranteeing in the gap nut assembly disappears the lead screw is along endwise slip's precision.
Another object of the present invention is to provide a gap eliminating nut assembly, wherein the gap eliminating nut assembly includes a barrel, wherein the barrel is fixed to the nut of the gap eliminating nut assembly, and wraps the elastic assembly inside to prevent other impurities such as dust from entering and affecting the precision of the gap eliminating nut assembly.
Another object of the present invention is to provide a gap eliminating nut assembly, wherein after the thread on the screw rod of the message nut assembly is worn, the gap eliminating nut can automatically eliminate the gap caused by the wear.
In order to realize the utility model discloses above at least one purpose, the utility model provides a crack nut component disappears, wherein the crack nut component that disappears includes:
a screw rod; and
a spacing subassembly, wherein spacing subassembly includes a nut flange, an elastic component and a locating part, the middle part of nut flange is equipped with a screw thread butt joint hole for threaded connection the lead screw, the outer wall of lead screw is provided with the screw along the axial, with screw thread butt joint hole threaded connection, the nut flange has one and supports the pressure face, the locating part by for the nut flange is fixed, the one end of elastic component is supported press support the pressure face, the other end of elastic component is supported press in the locating part.
According to the utility model discloses an embodiment, the nut flange certainly support the face of pressing and extend integratively and form a mount pad, the elastic component is implemented a coil spring, wherein the elastic component with the mode of compression suit in the mount pad surface.
According to the utility model discloses an embodiment, the middle part of mount pad forms a screw thread passageway, wherein the screw thread passageway with on the nut flange screw thread butt joint hole intercommunication and aim at, wherein the lead screw by threaded connection in screw thread butt joint hole.
According to the utility model discloses an embodiment, the locating part middle part forms a spacing screw hole, spacing screw hole with the screw channel intercommunication, and the lead screw by threaded connection in spacing screw hole.
According to the utility model discloses an embodiment, the locating part middle part forms a spacing screw hole, spacing screw hole with the screw channel intercommunication, and the lead screw by threaded connection in spacing screw hole.
According to the utility model discloses an embodiment, the anti-backlash nut component includes the barrel, the barrel forms a first opening and a second opening, the barrel suit is in around the elastic component, and support the face of pressing and be covered in first opening, and the barrel is fixed in support the face of pressing, the locating part is covered in the second opening, and the locating part is fixed in the barrel.
According to the utility model discloses an embodiment, be equipped with at least three bolt hole on the nut flange, it is wherein three hole center between the bolt hole forms a triangle-shaped.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
Drawings
Fig. 1 shows a perspective view of the anti-backlash nut assembly of the present invention.
Fig. 2 shows an exploded view of the anti-backlash nut assembly of the present invention.
Fig. 3 shows a schematic view of the anti-backlash nut assembly according to the present invention in another state.
Fig. 4 shows a cross-sectional view of the anti-backlash nut assembly of the present invention in one state.
Detailed Description
The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.
An anti-backlash nut assembly according to a preferred embodiment of the present invention will be described in detail below with reference to fig. 1 to 4 of the specification, wherein the anti-backlash nut assembly can be used in a precision instrument so that the lead screw can move in an axial direction when the lead screw is driven to rotate.
Specifically, the anti-backlash nut assembly comprises a screw rod 10 and a limiting assembly 20. The limiting assembly 20 includes a nut flange 21, an elastic member 22 and a limiting member 23.
The middle part of the nut flange 21 is provided with a threaded butt joint hole 2101 for threaded connection with the screw rod 10. The outer wall of the screw rod 10 is provided with threads along the axial direction so as to be in threaded connection with the threaded butt joint hole 2101.
The nut flange 21 has a pressing surface 2101. One end of the elastic member 22 is pressed against the pressing surface 2101. The limiting member 23 is fixed to the abutting surface 2101 of the nut flange 21, and forms an installation space 201 with the nut flange 21. The elastic member 22 is mounted in the mounting space 201, and the other end of the elastic member 22 is pressed against the stopper 23. A limiting threaded hole 2301 is formed in the middle of the limiting piece 23 and is used for the screw rod 10 to pass through.
In the present invention, the screw rod 10 is screwed into the threaded hole 2102 at the middle of the nut flange 21, and the nut flange 21 receives the elastic force of the elastic member 22 in the axial direction, so that the nut flange 21 is pressed against the screw rod 10 by the elastic member 22, and the gap between the screw rod 10 and the nut flange 21 in the axial direction is completely eliminated.
Preferably, the nut flange 21 integrally extends from the pressing surface 2101 to form a mounting seat 22. The elastic member 22 is implemented as a coil spring, wherein the elastic member 22 is sleeved on the outer surface of the mounting seat 22 to limit the elastic member 22 from moving in the radial direction. A threaded passage 2201 is formed in the middle of the mounting seat 22, wherein the threaded passage 2201 is communicated with the threaded butt hole 2101 on the nut flange 21. In other words, the threaded interface hole 2101 and the threaded passage 2201 are coaxially disposed.
Preferably, the lead screw 10 is threadedly coupled to the threaded passage 2201. Since the mounting seat 22 integrally extends from the nut flange 21, the gap between the screw rod 10 and the threaded passage 2201 is also completely eliminated after the elastic member 22 compresses the mounting seat 22. The threaded passage 2201 is in aligned communication with the threaded bore 2102. The screw channel 2201 extends the length of the screw connection of the screw rod 10, so that the screw rod 10 is more stable during movement.
The limiting member 23 is relatively fixed to the nut flange 21, and a cross-sectional diameter of the limiting member 23 is greater than a cross-sectional width of the elastic member 22, so that after the elastic member 22 is sleeved on the mounting seat 22, two ends of the elastic member respectively abut against the abutting surface 2101 and the limiting member 23.
The limit screw hole 2301 communicates with the screw passage 2201, and the lead screw 10 is screwed into the limit screw hole 2301. The limiting member 23 is arranged to be fixedly connected to the nut flange 21. Therefore, when the anti-backlash nut assembly is in a working process, the screw rod 10 is limited by the nut flange 21 and the limiting piece 23, so that the screw rod cannot swing in the radial direction, and the anti-backlash nut assembly has higher precision and stability.
Further, the anti-backlash nut assembly includes a barrel 30. The barrel 30 defines a first opening 301 and a second opening 302. The cylinder 30 is sleeved around the elastic member 22, the pressing surface 2101 is covered on the first opening 301, and the cylinder 30 is fixed on the pressing surface 2101. The stopper 23 is covered on the second opening 302, and the stopper 23 is fixed to the cylinder 30.
In this way, the elastic member 22 is hidden in the inner cavity of the cylinder 30, and foreign matters such as dust are difficult to enter.
Preferably, at least three bolt holes are formed in the nut flange 21 so that the nut flange 21 can be fixed by bolts. The centers of the holes between the three bolt holes form a triangle.
It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.
Claims (6)
1. An anti-backlash nut assembly, wherein said anti-backlash nut assembly comprises:
a screw rod; and
a spacing subassembly, wherein spacing subassembly includes a nut flange, an elastic component and a locating part, the middle part of nut flange is equipped with a screw thread butt joint hole for threaded connection the lead screw, the outer wall of lead screw is provided with the screw along the axial, with screw thread butt joint hole threaded connection, the nut flange has one and supports the pressure face, the locating part by for the nut flange is fixed, the one end of elastic component is supported press support the pressure face, the other end of elastic component is supported press in the locating part.
2. The anti-backlash nut assembly as claimed in claim 1, wherein said nut flange integrally extends from said abutment surface to form a mounting seat, said resilient member being embodied as a coil spring, wherein said resilient member is compressively fitted to an outer surface of said mounting seat.
3. The anti-backlash nut assembly according to claim 2, wherein a central portion of said mounting seat defines a threaded passage, wherein said threaded passage communicates with and aligns with said threaded interface hole on said nut flange, and wherein said lead screw is threaded into said threaded interface hole.
4. The anti-backlash nut assembly as claimed in claim 3, wherein said retainer has a retainer threaded bore formed in a central portion thereof, said retainer threaded bore communicating with said threaded passage, and said lead screw being threadedly coupled to said retainer threaded bore.
5. The anti-backlash nut assembly according to any one of claims 1 to 4, wherein the anti-backlash nut assembly includes a cylindrical body defining a first opening and a second opening, the cylindrical body being fitted around the elastic member, and the abutting surface being fitted to the first opening, and the cylindrical body being fixed to the abutting surface, the stopper being fitted to the second opening, and the stopper being fixed to the cylindrical body.
6. The anti-backlash nut assembly according to claim 5, wherein at least three bolt holes are provided in said nut flange, wherein hole centers between three of said bolt holes form a triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020986014.6U CN212744914U (en) | 2020-06-02 | 2020-06-02 | Anti-backlash nut assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020986014.6U CN212744914U (en) | 2020-06-02 | 2020-06-02 | Anti-backlash nut assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212744914U true CN212744914U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020986014.6U Active CN212744914U (en) | 2020-06-02 | 2020-06-02 | Anti-backlash nut assembly |
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|---|---|
| CN (1) | CN212744914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653777A (en) * | 2021-09-07 | 2021-11-16 | 深圳市安卓信五金机械有限公司 | Nut with clearance elimination function |
-
2020
- 2020-06-02 CN CN202020986014.6U patent/CN212744914U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653777A (en) * | 2021-09-07 | 2021-11-16 | 深圳市安卓信五金机械有限公司 | Nut with clearance elimination function |
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