Embedded transmission bearing locking structure
The embedded transmission bearing locking structure solves the problems of loosening and large space occupation of traditional locking structures through interference fit and clamping component design, achieving stable locking at high speeds and simplifying installation, thus improving the vibration resistance and rigidity of the equipment.
Patent Information
- Application Number
- CN202520435919.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Traditional bearing locking structures are prone to loosening, are complex to install, and occupy a large axial space, making them particularly unsuitable for use in high-speed and high-precision equipment.
An embedded transmission bearing locking structure is adopted, and the bearing is locked through interference fit and clamping components. The surface contact design of the stop and locking parts reduces the use of traditional nuts and washers.
It achieves stable locking of bearings at high speeds, reduces axial space occupation, simplifies the installation process, improves vibration resistance and rigidity, and reduces the risk of uneven bearing load.
Smart Images
Figure CN223794509U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mechanical transmission technology, and in particular to an embedded transmission bearing locking structure. Background Technology
[0002] Traditional bearing locking structures use a nut and washer locking method. This method requires sufficient thread length to be provided at the shaft end, and then multiple shims are stacked to adjust the clearance, which significantly increases the axial length of the locking structure and occupies more axial space. Furthermore, traditional bearing locking structures use a set screw installation method, which requires multiple disassemblies and adjustments (such as adding or removing shims, retightening screws, etc.), resulting in low installation efficiency, especially in high-precision equipment. Finally, traditional bearing locking structures are also relatively prone to loosening and are unsuitable for use on high-speed shafts. Therefore, a new bearing locking structure is urgently needed to solve the problems of easy loosening, complex installation, and large axial space occupation due to the large axial dimension of traditional bearing locking structures. Utility Model Content
[0003] This application provides an embedded transmission bearing locking structure. This locking structure is simple to install, not easy to loosen, and has a small axial dimension. It can be used on high-speed rotating shafts and occupies little axial space.
[0004] This application provides an embedded transmission bearing locking structure, including a bracket, a shaft assembly, and a clamping assembly;
[0005] The rotating shaft assembly includes a rotating shaft, an anti-detachment component, and a locking component. A fixing component is sleeved on the first end of the rotating shaft, and the fixing component is interference-fitted with the rotating shaft. A groove is provided on the outer wall of the second end of the rotating shaft, and the anti-detachment component is sleeved in the groove.
[0006] The locking assembly is sleeved on the rotating shaft, located between the fixing member and the anti-detachment member, and has a certain distance from both the fixing member and the anti-detachment member. The locking assembly is interference-fitted with the rotating shaft.
[0007] The first bearing is fitted onto the rotating shaft at the position between the fixing member and the locking assembly, and the second bearing is fitted onto the rotating shaft at the position between the anti-detachment member and the locking assembly. The first bearing is interference-fitted with the rotating shaft and simultaneously fits against the fixing member and the locking assembly, while the second bearing is clearance-fitted with the rotating shaft and simultaneously fits against the anti-detachment member and the locking assembly.
[0008] The bracket has mounting holes for mounting the rotating shaft assembly and the first bearing and the second bearing. The first bearing is clearance-fitted to the mounting hole, and the second bearing is interference-fitted to the mounting hole.
[0009] The clamping assembly is installed on the mounting hole and is used to clamp the first bearing and the second bearing.
[0010] In the embedded transmission bearing locking structure described in the embodiments of this application, the locking assembly includes a stop member and a locking member;
[0011] Both the stop and the locking member are sleeved on the rotating shaft and are interference-fitted with the rotating shaft. The stop and the locking member are closely attached to each other, with the stop located at the end closer to the anti-detachment member and the locking member located at the end closer to the fixing member.
[0012] In the embedded transmission bearing locking structure described in the embodiments of this application, the stop element is an O-ring.
[0013] In the embedded transmission bearing locking structure described in the embodiments of this application, the O-ring is made of fluororubber.
[0014] In the embedded transmission bearing locking structure described in the embodiments of this application, the locking element is a bearing sleeve.
[0015] In the embedded transmission bearing locking structure described in this application embodiment, the clamping assembly includes a bearing pressure plate and a fastener. The bearing pressure plate is installed on the mounting hole, and the fastener is used to fasten the bearing pressure plate and the bracket.
[0016] In the embedded transmission bearing locking structure described in the embodiments of this application, the fastener is a screw.
[0017] In the embedded transmission bearing locking structure described in the embodiments of this application, the anti-disengagement component is a shaft elastic retaining ring.
[0018] In the embedded transmission bearing locking structure described in the embodiments of this application, both the first bearing and the second bearing are deep groove ball bearings.
[0019] The embedded transmission bearing locking structure provided in this application embodiment firstly achieves bearing locking through interference fit and clamping components, thus preventing loosening. The uniform locking force distribution also reduces the risk of uneven bearing load, enabling its use on high-speed shafts. Secondly, locking is completed by simple pressure application and axial pushing, reducing the complexity of repeatedly adjusting the nut torque in traditional locking methods, thus simplifying installation. Finally, since it does not use the traditional locking structure of nut and washer, the axial length of the locking structure is reduced, resulting in a smaller axial space occupation. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the embedded transmission bearing locking structure provided in an embodiment of this application.
[0022] Explanation of icon numbers:
[0023] 10-Bracket 20-Spindle Assembly 30-Pressure Assembly
[0024] 40-Fixed component; 50-First bearing; 60-Second bearing
[0025] 201-Spindle 202-Anti-detachment component 203-Locking assembly
[0026] 301 - Bearing pressure plate; 302 - Fastener; 2031 - Stopping component
[0027] 2032-Locking component Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0029] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0032] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0033] This application provides an embedded transmission bearing locking structure. (See reference...) Figure 1 The embedded transmission bearing locking structure includes a bracket 10, a rotating shaft assembly 20, and a clamping assembly 30.
[0034] The rotating shaft assembly 20 includes a rotating shaft 201, an anti-detachment component 202, and a locking component 203. A fixing component 40 is sleeved on the first end of the rotating shaft 201, and the fixing component 40 is interference-fitted with the rotating shaft 201. A groove is provided on the outer wall of the second end of the rotating shaft 201, and the anti-detachment component 202 is sleeved in the groove.
[0035] The locking assembly 203 is sleeved on the rotating shaft 201, located between the fixing member 40 and the anti-detachment member 202, and has a certain distance from both the fixing member 40 and the anti-detachment member 202. The locking assembly 203 is interference-fitted with the rotating shaft 201.
[0036] The first bearing 50 is fitted onto the pivot 201 at the position between the fixing member 40 and the locking assembly 203, and the second bearing 60 is fitted onto the pivot 201 at the position between the anti-detachment member 202 and the locking assembly 203. The first bearing 50 is interference-fitted with the pivot 201 and is in contact with both the fixing member 40 and the locking assembly 203. The second bearing 60 is clearance-fitted with the pivot 201 and is in contact with both the anti-detachment member 202 and the locking assembly 203.
[0037] Among them, the anti-detachment component 202 blocks the second bearing 60 and, together with the locking component 203, locks the second bearing 60 in a fixed position; the fixing component 40 blocks the first bearing 50 and, together with the locking component 203, locks the first bearing 50 in a fixed position.
[0038] The bracket 10 has mounting holes for mounting the rotating shaft 201 assembly and the first bearing 50 and the second bearing 60. The first bearing 50 is clearance-fitted with the mounting hole, and the second bearing 60 is interference-fitted with the mounting hole.
[0039] The locking assembly 203 and the bracket 10 lock the first bearing 50 and the second bearing 60, locking the axial direction.
[0040] The clamping assembly 30 is mounted on the mounting hole and is used to clamp the first bearing 50 and the second bearing 60.
[0041] When the deep groove ball bearing is subjected to axial force with clearance, the shaft 201 will pull the first bearing 50 in the axial direction. The interference force between the outer ring of the bearing and the inner wall of the bracket 10 is not enough. Furthermore, the outer ring of the first bearing 50 and the inside of the bracket 10 are in clearance fit without friction. Therefore, the clamping assembly 30 is required to clamp it. Otherwise, the outer ring of the first bearing 50 will run out of space.
[0042] When locking the bearing through the embedded transmission bearing locking structure, firstly, the rotating shaft assembly 20, the first bearing 50, and the second bearing 60 are all placed into the mounting holes on the bracket 10. Then, the clamping assembly 30 is installed on the mounting holes of the bracket 10 for locking. Finally, the anti-detachment component 202 is placed in the groove opened on the rotating shaft 201.
[0043] Since all components of the embedded transmission bearing locking structure in this embodiment are installed in the axial direction, the structure can withstand axial loads.
[0044] The embedded transmission bearing locking structure provided in this application embodiment firstly achieves bearing locking through interference fit and clamping assembly 30, thus preventing loosening. The embedded locking achieves a tight fit between the bearing and shaft through surface contact, providing higher rigidity and vibration resistance compared to traditional point contact locking. The uniform locking force distribution also reduces the risk of uneven bearing load, enabling its use on high-speed shafts. Secondly, locking is completed by simple axial pushing with pressure, reducing the complexity of repeatedly adjusting the nut torque in traditional locking methods, thus simplifying installation. Finally, since it does not use the traditional locking structure of nut and washer, the axial length of the locking structure is reduced, resulting in less axial space occupation. Through the embedded transmission bearing locking structure of this application embodiment, the bearing is fully locked, achieving good transmission performance under high-speed conditions. The bearing will not loosen, and disassembly is simple, facilitating later maintenance and replacement.
[0045] In some embodiments, the locking assembly 203 includes a stop member 2031 and a locking member 2032; both the stop member 2031 and the locking member 2032 are sleeved on the rotating shaft 201 and are interference-fitted with the rotating shaft 201. The stop member 2031 and the locking member 2032 are tightly attached to each other, with the stop member 2031 located at one end near the anti-disengagement member 202 and the locking member 2032 located at one end near the fixing member 40.
[0046] The locking member 2032 is interference-fitted with the rotating shaft 201. The locking member 2032 is pressed into the rotating shaft 201 and fits against the inner ring of the first bearing 50, thus restricting the axial movement of the first bearing 50.
[0047] Among them, the stop 2031 fits against the inner ring of the bearing under the pressure of the locking member 2032, which can effectively prevent the bearing from slipping due to insufficient friction between the inner wall of the bearing and the rotating shaft 201.
[0048] In some embodiments, the stop 2031 is an O-ring.
[0049] The use of O-rings effectively prevents slippage caused by insufficient friction between the shaft 201 and the bearing due to excessive rotational speed.
[0050] In some embodiments, the O-ring is made of fluororubber.
[0051] The fluororubber O-ring, after installation, is clamped between the locking member 2032 and the inner ring of the second bearing 60, causing the O-ring to undergo elastic deformation and providing friction to prevent slippage.
[0052] In some embodiments, the locking element 2032 is a bearing sleeve.
[0053] In some embodiments, the clamping assembly 30 includes a bearing plate 301 and a fastener 302. The bearing plate 301 is mounted on a mounting hole, and the fastener 302 is used to fasten the bearing plate 301 and the bracket 10.
[0054] In some embodiments, the fastener 302 is a screw.
[0055] In some embodiments, the anti-detachment component 202 is a shaft elastic retaining ring.
[0056] In some embodiments, both the first bearing 50 and the second bearing 60 are deep groove ball bearings.
[0057] In summary, the embedded transmission bearing locking structure provided in this application, in addition to the advantages mentioned above, also has the following advantages:
[0058] 1. Space Compactness
[0059] Space-saving: The embedded structure reduces the need for additional locking components by integrating the locking mechanism directly into the shaft design, making it suitable for compact devices with limited space.
[0060] Simplified design: The overall structure is simpler, making it especially suitable for modern machinery with high-density layouts.
[0061] 2. Ease of installation and maintenance
[0062] Quick installation: The embedded locking structure completes the locking by axially pushing in with simple pressure (this application only uses screws for locking in one place), which reduces the complexity of repeatedly adjusting the nut torque in traditional locking methods (traditional structures often require multiple disassembly and adjustment (such as adding or removing shims, retightening the set screw), which is particularly inefficient in high-precision equipment).
[0063] Easy disassembly: The embedded structure allows for quick disassembly by releasing pressure on the parts, avoiding the disassembly difficulties caused by corrosion of traditional nut set screws.
[0064] 3. Performance Improvement
[0065] Rigidity: The embedded locking mechanism achieves a tight fit between the bearing and the shaft through surface contact, which provides higher rigidity and vibration resistance compared to traditional point contact locking.
[0066] Reduced risk of eccentricity: Uniform locking force distribution reduces the risk of uneven bearing load, making it suitable for high-speed rotation or high-precision applications.
[0067] 4. Enhanced reliability
[0068] Anti-loosening design: The embedded locking structure achieves locking through physical deformation, avoiding the loosening problem caused by vibration or thermal expansion of traditional nuts (the bearing pressure plate 301 of this application will press the outer ring of the first bearing 50 to the ground, and other parts are interference fit, so vibration has little impact on the structure of this application. The screw (fastener 302) will be coated with retaining glue when tightened, and will not loosen without external force.
[0069] Stress concentration: Traditional locking may cause damage to the shaft surface due to local pressure (the traditional locking set screw needs to be aligned with the threaded hole or recess on the shaft. If the position is misaligned, it may scratch the shaft surface or even damage the bearing), while the embedded structure protects the shaft and bearing by evenly distributing the force.
[0070] 5. Adaptable to extreme working conditions
[0071] High-speed and heavy-load resistance: The embedded structure maintains stable contact under high speed or heavy load conditions, reducing fit failure caused by centrifugal force or excessive or insufficient load.
[0072] 6. Lightweight
[0073] Reduce the number of components: Eliminating traditional external components reduces overall weight and is of great help to lightweight design in aerospace, automotive and other fields.
[0074] In summary, the embedded transmission bearing locking structure provided in this application embodiment firstly achieves bearing locking through interference fit and clamping assembly 30, thus preventing loosening. The embedded locking achieves a tight fit between the bearing and shaft through surface contact, providing higher rigidity and vibration resistance compared to traditional point contact locking. The uniform locking force distribution also reduces the risk of uneven bearing load, enabling its use on high-speed shafts. Secondly, locking is completed by simple axial pushing with pressure, reducing the complexity of repeatedly adjusting the nut torque in traditional locking methods, thus simplifying installation. Finally, since it does not use the traditional locking structure of nut and washer, the axial length of the locking structure is reduced, resulting in less axial space occupation. Through the embedded transmission bearing locking structure of this application embodiment, the bearing is fully locked, achieving good transmission performance under high-speed conditions. The bearing will not loosen, and disassembly is simple, facilitating later maintenance and replacement.
[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0076] The above provides a detailed description of an embedded transmission bearing locking structure provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. An in-line drive bearing lock structure, characterized by, The support, the rotating shaft assembly and the compression assembly are included. The rotating shaft assembly includes a rotating shaft, an anti-off piece and a locking assembly, the first end of the rotating shaft is provided with a fixing piece, the fixing piece is in interference fit with the rotating shaft, the second end of the rotating shaft is provided with a groove, and the anti-off piece is sleeved in the groove. The locking assembly is sleeved on the rotating shaft and located between the fixing piece and the anti-off piece, and has a certain distance from the fixing piece and the anti-off piece, wherein the locking assembly is in interference fit with the rotating shaft. The first bearing is sleeved on the rotating shaft between the fixing piece and the locking assembly, and the second bearing is sleeved on the rotating shaft between the anti-off piece and the locking assembly, wherein the first bearing is in interference fit with the rotating shaft and simultaneously in close contact with the fixing piece and the locking assembly, and the second bearing is in clearance fit with the rotating shaft and simultaneously in close contact with the anti-off piece and the locking assembly. The support is provided with a mounting hole for mounting the rotating shaft assembly and the first bearing and the second bearing, the first bearing is in clearance fit with the mounting hole, and the second bearing is in interference fit with the mounting hole. The compression assembly is mounted on the mounting hole and used for compressing the first bearing and the second bearing.
2. The inboard drive bearing lock structure of claim 1, wherein, The locking assembly includes a stopper and a locking piece. The stopper and the locking piece are both sleeved on the rotating shaft and in interference fit with the rotating shaft, the stopper and the locking piece are in close contact, the stopper is located at one end close to the anti-off piece, and the locking piece is located at one end close to the fixing piece.
3. The inboard drive bearing lock structure of claim 2, wherein, The stopper is an O-shaped ring.
4. The inboard drive bearing lock structure of claim 3, wherein, The material of the O-shaped ring is fluorine rubber.
5. The inboard drive bearing lock structure of claim 2, wherein, The locking piece is a bearing pressing sleeve.
6. The inboard drive bearing lock structure of claim 1, wherein, The compression assembly includes a bearing pressing plate and a fastener, the bearing pressing plate is mounted on the mounting hole, and the fastener is used for fastening the bearing pressing plate and the support.
7. The inboard drive bearing lock structure of claim 6, wherein, The fastener is a screw.
8. The inboard drive bearing lock structure of claim 1, wherein, The anti-off piece is an elastic shaft ring.
9. The inboard drive bearing lock structure of claim 1, wherein, The first bearing and the second bearing are both deep groove ball bearings.