Locking and anti-loosening precision nut
By designing the double nut self-locking mechanism and protective structure, the problems of low self-locking reliability and lack of protection of locking nuts in dynamic loads are solved, and the effect of high reliability locking and corrosion prevention is achieved.
Patent Information
- Application Number
- CN202421618910.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing locking nuts have low self-locking reliability in dynamic loads and are prone to loosening. The lack of protective mechanisms leads to rust and affects maintenance.
A locking anti-loose precision nut is designed, adopting a double-nut self-locking mechanism, which achieves locking through different rotation coefficients of the first and second nuts, combining protective sleeves and lubricating oil filling to prevent loosening and rust.
High reliability locking of nuts is achieved, avoiding loosening and rust, extending service life, and simplifying the operation process.
Smart Images
Figure CN222836043U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nuts, in particular to a locking and anti-loosening precision nut. Background Art
[0002] Locking nuts are widely used in machinery and other industries. Their working principle is to use the friction between the nut and the bolt for self-locking. However, the reliability of this self-locking will be reduced under dynamic loads. In some important occasions, we will take some anti-loosening measures to ensure the reliability of nut locking.
[0003] The locking nut is locked by friction, which is easy to loosen after long-term use, affecting the use effect. The existing locking nut is not convenient to effectively solve the loosening problem, and the operability is poor; and there is no protective mechanism between the existing locking nut and the screw, which is easy to rust after being exposed to the outside world for a long time, affecting maintenance. Utility Model Content
[0004] The utility model aims to provide a locking and anti-loosening precision nut, which has the advantages of double nuts to complete self-locking, prevent loosening and have good external protection effect and avoid rust, so as to solve the problems in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking and anti-loosening precision nut, comprising a protective sleeve, a first nut and a second nut, a positioning hole and a through-hole are provided in an annular array on the outer side of the upper end of the second nut, a connecting screw is installed in the inner thread of the through-hole, the first nut is located on the lower side of the second nut, a connecting hole is provided in an annular array on the outer side of the upper end of the first nut, the protective sleeve is sleeved on the outer sides of the first nut and the second nut, and a rod opening is provided in the middle of the upper end of the protective sleeve.
[0006] When using a locking and anti-loosening precision nut in the technical solution, the first nut thread is installed on the screw rod so that the first nut fits the bottom to complete the locking, and then the second nut thread is installed on the screw rod so that the second nut is located on the upper side of the first nut, the spacing is adjusted to make the connection points correspond, the connecting screw thread is passed through the through hole, and then its lower end thread is installed on the corresponding connecting hole, and the first nut and the second nut are bound by the connecting screw. They need to rotate at the same time, but the rotation coefficients of the first screw groove and the second screw groove are different, and synchronous rotation cannot be completed. Therefore, the first nut and the second nut are mutually restrained to achieve locking, and lubricating oil is applied to the outside of the first nut and the second nut and the connection between them, the rod mouth of the protective cover is docked with the outer end of the screw, and then the protective cover is sleeved on the outside of the first nut and the second nut, the positioning column is docked with the positioning hole, the bottom of the protective cover is docked with the gasket, and the lubricating oil is filled to achieve closure.
[0007] Preferably, a second screw groove is formed in the middle of the second nut, a first screw groove is formed in the middle of the first nut, and the rod opening, the first screw groove and the second screw groove correspond to each other. The connection of the screw rod is achieved through the rod opening, the first screw groove and the second screw groove.
[0008] Preferably, the thread coefficients of the first screw groove and the second screw groove are proportional. The thread coefficient ratio of the first screw groove and the second screw groove makes their rotation coefficients different and restrains each other.
[0009] Preferably, the through hole passes through the second nut, and the through hole corresponds to the connecting hole, and the connecting screw thread passes through the through hole and is installed in the connecting hole. The first nut and the second nut are connected and fixed by the connection screw, the through hole and the connecting hole.
[0010] Preferably, the number of the positioning holes and the through holes are six, and the positioning holes and the through holes are staggered, which facilitates connection alignment.
[0011] Preferably, a gasket is fixed at the lower end of the first nut, and the lower end opening of the protective sleeve is butted against the outer side of the gasket. The lower opening of the protective sleeve is sealed by the gasket to reduce the spillage of lubricating oil.
[0012] Preferably, the protective sleeve has positioning posts distributed in an annular array at the top of the inner portion, and the positioning posts are inserted into corresponding positioning holes. The positioning posts are connected to the positioning holes to achieve calibration connection during the installation of the protective sleeve.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: during installation, the first nut is threadedly installed on the screw rod, so that the first nut fits the bottom to complete the locking, and then the second nut is threadedly installed on the screw rod, so that the second nut is located on the upper side of the first nut, the spacing is adjusted to make the connection points correspond, the connection screw thread is passed through the perforation, and then its lower end thread is installed on the corresponding connection hole, and the first nut and the second nut are bound by the connection screw, and they need to rotate at the same time, but the rotation coefficients of the first screw groove and the second screw groove are different, and synchronous rotation cannot be completed, so the first nut and the second nut complete mutual restraint to achieve locking, lubricating oil is applied to the outside of the first nut and the second nut and the connection with them, the rod mouth of the protective sleeve is docked with the outer end of the screw, and then the protective sleeve is sleeved on the outside of the first nut and the second nut, the positioning column is docked with the positioning hole, the bottom of the protective sleeve is docked with the gasket, and the lubricating oil is filled to achieve closure. The device has a simple structure and is easy to operate. The locking and relaxation design is performed by using the first nut and the second nut with different rotation coefficients and both adapted to the screw. At the same time, the external protective structure avoids rust caused by long-term exposure, thereby ensuring the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the structure of the utility model;
[0016] Figure 3 This is a schematic diagram of the second nut structure of the utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the protective cover of the utility model.
[0018] In the figure: 1, protective cover; 2, rod mouth; 3, first nut; 4, connecting hole; 5, first screw groove; 6, second nut; 7, positioning hole; 8, through hole; 9, second screw groove; 10, connecting screw; 11, positioning column; 12, gasket. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] Embodiment 1
[0021] See also Figures 1 to 4 The utility model provides an embodiment: a locking and anti-loosening precision nut, comprising a protective sleeve 1, a first nut 3 and a second nut 6, a positioning hole 7 and a through hole 8 are opened in an annular array on the outer side of the upper end of the second nut 6, and a connecting screw 10 is installed with an internal thread of the through hole 8, the first nut 3 is located at the lower side of the second nut 6, and a connecting hole 4 is opened in an annular array on the outer side of the upper end of the first nut 3, the through hole 8 passes through the second nut 6, and the through hole 8 corresponds to the connecting hole 4, and the connecting screw 10 is installed in the connecting hole 4 after threading through the through hole 8, and the first nut 3 and the second nut 6 are connected and fixed by the connection screw 10, the through hole 8 and the connecting hole 4. The positioning hole 7 and the through hole 8 are each provided with six, and the positioning hole 7 and the through hole 8 are staggered, and the staggered distribution is convenient for connection and alignment, and a gasket 12 is fixed on the lower end of the first nut 3, and the lower end opening of the protective sleeve 1 is connected to the outer side of the gasket 12, and the lower side opening of the protective sleeve 1 is closed by the gasket 12 to reduce the overflow of lubricating oil.
[0022] Embodiment 2
[0023] See also Figures 1 to 4The utility model provides an embodiment: a locking and anti-loosening precision nut, comprising a protective sleeve 1, a first nut 3 and a second nut 6, a second screw groove 9 is opened in the middle of the second nut 6, a first screw groove 5 is opened in the middle of the first nut 3, and the rod mouth 2, the first screw groove 5 and the second screw groove 9 correspond to each other, and the connection of the screw rod is realized through the rod mouth 2, the first screw groove 5 and the second screw groove 9, the thread coefficients of the first screw groove 5 and the second screw groove 9 are proportional, and the thread coefficient ratio of the first screw groove 5 and the second screw groove 9 makes their rotation coefficients different and restrain each other, the protective sleeve 1 is sleeved on the outside of the first nut 3 and the second nut 6, the rod mouth 2 is opened in the middle of the upper end of the protective sleeve 1, and the inner top end of the protective sleeve 1 is distributed with positioning columns 11 in an annular array, and the positioning columns 11 are inserted into the corresponding positioning holes 7, and the positioning columns 11 are connected with the positioning holes 7 to realize the calibration connection during the installation of the protective sleeve 1.
[0024] During operation of the utility model, during installation, the first nut 3 is threadedly installed on the screw rod so that the first nut 3 fits the bottom to complete the locking, and then the second nut 6 is threadedly installed on the screw rod so that the second nut 6 is located on the upper side of the first nut 3, the spacing is adjusted to make the connection points correspond, the connecting screw 10 is threaded through the through hole 8, and then its lower end is threadedly installed on the corresponding connecting hole 4, and the first nut 3 and the second nut 6 are bound by the connecting screw 10, and they need to be rotated at the same time, but the rotation coefficients of the first screw groove 5 and the second screw groove 9 are different, and synchronous rotation cannot be completed. Therefore, the first nut 3 and the second nut 6 complete mutual restraint to achieve locking, lubricating oil is applied to the outside of the first nut 3 and the second nut 6 and the connection therewith, the rod mouth 2 of the protective cover 1 is docked with the outer end of the screw, and then the protective cover 1 is sleeved on the outside of the first nut 3 and the second nut 6, the positioning column 11 is docked with the positioning hole 7, the bottom of the protective cover 1 is docked with the gasket 12, and the lubricating oil is filled to achieve closure.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A locking and anti-loosening precision nut, comprising a protective sleeve (1), a first nut (3) and a second nut (6), characterized in that: The upper outer side of the second nut (6) is provided with positioning holes (7) and through holes (8) in an annular array, and the through holes (8) are internally threaded with connecting screws (10). The first nut (3) is located at the lower side of the second nut (6), and the upper outer side of the first nut (3) is provided with connecting holes (4) in an annular array. The protective sleeve (1) is sleeved on the outer sides of the first nut (3) and the second nut (6), and a rod opening (2) is provided in the middle of the upper end of the protective sleeve (1).
2. The locking and anti-loosening precision nut according to claim 1, characterized in that: A second screw groove (9) is provided in the middle of the second nut (6), a first screw groove (5) is provided in the middle of the first nut (3), and the rod mouth (2), the first screw groove (5) and the second screw groove (9) correspond to each other.
3. A locking and anti-loosening precision nut according to claim 2, characterized in that: The thread coefficients of the first screw groove (5) and the second screw groove (9) are proportional.
4. The locking and anti-loosening precision nut according to claim 1, characterized in that: The through hole (8) passes through the second nut (6), and the through hole (8) corresponds to the connecting hole (4). The connecting screw (10) is installed in the connecting hole (4) after threading through the through hole (8).
5. The locking and anti-loosening precision nut according to claim 1, characterized in that: Six positioning holes (7) and six through holes (8) are provided, and the positioning holes (7) and the through holes (8) are distributed in a staggered manner.
6. The locking and anti-loosening precision nut according to claim 1, characterized in that: A gasket (12) is fixed to the lower end of the first nut (3), and the lower end opening of the protective sleeve (1) is butted against the outer side of the gasket (12).
7. The locking and anti-loosening precision nut according to claim 1, characterized in that: Positioning posts (11) are distributed in a circular array at the top end of the inner portion of the protective sleeve (1), and the positioning posts (11) are inserted into corresponding positioning holes (7).