Threaded rotary structure capable of precisely adjusting bearing axial play
By precisely adjusting the axial clearance of the bearing through a threaded rotating structure, the problems of cumbersome operation and component damage in traditional methods are solved, thereby improving the performance and reliability of the gearbox.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DONLY CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional methods for adjusting bearing axial clearance are cumbersome and can easily damage the end cap and related components, affecting sealing and connection accuracy, making it difficult to meet the requirements of high-speed and low-vibration-noise gearboxes.
The screw-rotating structure is adopted. By matching the screw thread with the gearbox mounting hole and the marking line, the rotation angle of the screw thread is accurately calculated, so as to achieve precise adjustment of the bearing axial clearance and avoid repeated disassembly and assembly operations.
It achieves precise adjustment of bearing axial clearance, avoiding the cumbersome operation and component damage of traditional methods, improving the performance and reliability of the gearbox, and meeting the stability requirements of high-speed and low-vibration noise reduction gearboxes.
Smart Images
Figure CN224497332U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, and in particular to a threaded rotating structure that can precisely adjust the axial clearance of a bearing. Background Technology
[0002] In the field of gearbox technology, precise adjustment of bearing axial clearance is of paramount importance for certain specialized gearboxes, especially those designed as a single unit with high operating speeds and stringent requirements for vibration and noise control. In these specialized gearboxes, high-speed operation subjects the bearings to significant dynamic loads, while the stringent requirements for vibration and noise control place extremely high demands on the bearing's operational stability. In such cases, even minute deviations in bearing axial clearance can trigger significant vibration and noise problems, thereby affecting the overall performance and reliability of the gearbox.
[0003] However, traditional methods for adjusting bearing axial clearance have many drawbacks. Typically, the traditional method relies on adding adjusting shims to change the bearing's axial position, thereby adjusting the clearance. However, this method is extremely cumbersome, requiring repeated disassembly and reassembly of the end cap for each adjustment. This not only consumes a significant amount of time and labor but also easily damages the end cap and related components during repeated disassembly and reassembly, affecting their sealing performance and connection accuracy. Utility Model Content
[0004] In view of this, in order to solve the above problems, the purpose of this utility model is to provide a threaded rotating structure that can precisely adjust the axial clearance of a bearing, which is installed in a gearbox, including: a cover, a gear shaft, and a cover fixing mechanism. The gearbox has mounting holes on both sides, and the cover is installed in one of the mounting holes. The gear shaft is located in the gearbox, with one end of the gear shaft extending into the cover and the other end of the gear shaft extending out of the other mounting hole. The cover fixing mechanism is provided on one side of the gearbox and is connected to the cover.
[0005] In another preferred embodiment, the outer edge of the cap is marked.
[0006] In another preferred embodiment, a marking line mates with the mark on one side outer wall of the gearbox.
[0007] In another preferred embodiment, the gear shaft is further provided with two bearings, one bearing being located in the other mounting hole and the other bearing being located in the end cap.
[0008] In another preferred embodiment, the cover fixing mechanism includes a fixing plate, a set screw and a locking nut, the fixing plate being connected to one side outer wall of the gearbox, and the fixing plate being connected to the cover via the set screw and the locking nut.
[0009] In another preferred embodiment, the end cap has a first threaded hole, and the fixing plate has a second threaded hole. The first threaded hole and the second threaded hole are positioned opposite each other, and the set screw is installed in the first threaded hole and the second threaded hole.
[0010] In another preferred embodiment, the locking nut is located on the outer edge of the set screw and is threaded into the set screw.
[0011] In another preferred embodiment, the end cap is threaded into one of the mounting holes.
[0012] In another preferred embodiment, the fixing plate is bolted to the gearbox.
[0013] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: By applying the present invention, a threaded rotation structure that can accurately adjust the axial clearance of the bearing is proposed. Through the threaded engagement between the end cap and the gearbox mounting hole, and the markings on the end cap and the marking lines on the gearbox, the required rotation angle of the end cap can be accurately calculated, thereby achieving precise adjustment of the axial clearance of the bearing. In addition, it does not require the addition of an adjustment shim, which can avoid the tedious operation of repeatedly disassembling and assembling the end cap in the traditional method, and thus avoid damage to the end cap and related components caused by repeated disassembly and assembly. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a threaded rotation structure that can precisely adjust the axial clearance of a bearing according to the present invention.
[0015] Figure 2 This is an initial state diagram of a threaded rotating structure of the present invention that can precisely adjust the axial clearance of a bearing during use.
[0016] Figure 3 This is a diagram showing the final state of a threaded rotating structure capable of precisely adjusting the axial clearance of a bearing during use.
[0017] In the attached image:
[0018] 1. Gearbox; 2. End cap; 3. Gear shaft; 4. Bearing; 5. Fixing plate; 6. Set screw; 7. Lock nut; 11. Marking line; 21. Marking; 51. Second threaded hole. Detailed Implementation
[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0020] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".
[0022] like Figure 1-3 As shown, a preferred embodiment of a threaded rotary structure capable of precisely adjusting the axial clearance of a bearing is installed in a gearbox 1. The structure includes a cover 2, a gear shaft 3, and a cover fixing mechanism. Mounting holes are provided on both sides of the gearbox 1. The cover 2 is installed in one of the mounting holes. The gear shaft 3 is located inside the gearbox 1, with one end extending into the cover 2 and the other end extending out of the other mounting hole. A cover fixing mechanism is provided on one side of the gearbox 1 and is connected to the cover 2.
[0023] Furthermore, as a preferred embodiment, the outer edge of the cover 2 is provided with a mark 21. More preferably, the number of marks 21 is two, with the two marks 21 facing each other radially along the cover 2.
[0024] Furthermore, as a preferred embodiment, the mark 21 is preferably set as an arc-shaped notch.
[0025] Furthermore, as a preferred embodiment, a marking line 11 is provided on one outer wall of the gearbox 1 to mate with the marking 21. Furthermore, by observing the angle between the marking 21 and the marking line 11, the operator can easily and accurately control the rotation angle of the end cap 2, thereby precisely adjusting the clearance.
[0026] Furthermore, as a preferred embodiment, it also includes bearings 4. Two bearings 4 are provided on the outer edge of the gear shaft 3, one bearing 4 is located in another mounting hole, and the other bearing 4 is located in the end cap 2. Furthermore, by screwing the end cap 2, the bearing 4 located in the end cap 2 can be pushed or pulled, thereby adjusting the distance between the two bearings 4 and achieving precise adjustment of the axial clearance of the bearing 4.
[0027] Furthermore, in a preferred embodiment, the end cap fixing mechanism includes a fixing plate 5, a set screw 6, and a locking nut 7. The fixing plate 5 is connected to one side of the outer wall of the gearbox 1, and the fixing plate 5 is connected to the end cap 2 via the set screw 6 and the locking nut 7. Further, the fixing plate 5 is used to fix the position of the end cap 2, the set screw 6 prevents the end cap 2 from rotating due to vibration or other factors during normal operation, ensuring that the axial clearance of the adjusted bearing 4 remains stable, and the locking nut 7 prevents the set screw 6 from loosening under long-term vibration.
[0028] Furthermore, as a preferred embodiment, the end cap 2 has a first threaded hole, and the fixing plate 5 has a second threaded hole 51. The first threaded hole and the second threaded hole 51 are positioned opposite each other, and the set screw 6 is installed in the first threaded hole and the second threaded hole 51.
[0029] Furthermore, as a preferred embodiment, the locking nut 7 is disposed on the outer edge of the set screw 6 and is threadedly engaged with the set screw 6.
[0030] Furthermore, as a preferred embodiment, the end cap 2 is threaded into one of the mounting holes.
[0031] Furthermore, as a preferred embodiment, the fixing plate 5 is connected to the gearbox 1 by bolts.
[0032] The working principle of this utility model is as follows: See Figure 2 As shown, upon initial use, first install the fixing plate 5 onto one side of the outer wall of the gearbox 1 using bolts. Then, insert the end cap 2 into one of the mounting holes and tighten it to ensure a tight fit. At this point, the two marks 21 on the end cap 2 are horizontal. Draw a marking line 11 on the outer wall of the gearbox 1 using a marker. The marking line 11 and the two marks 21 are linearly distributed horizontally, with the marking line 11 close to one of the marks 21. Next, install the two bearings 4 onto the gear shaft 3. Insert one end of the gear shaft 3 with the bearings 4 into the end cap 2. At this point, the axial clearance between the two bearings 4 is zero. Based on the required axial clearance A and the pitch P of the external thread on the end cap 2, calculate the required rotation angle θ of the end cap 2. The calculation formula is as follows:
[0033]
[0034] Then, the cap 2 can be screwed on to rotate it to the corresponding angle. At this time, the angle between mark 21 and mark line 11 is θ. After adjustment, the fixing plate 5 and the cap 2 are connected by the set screw 6 and the lock nut 7 to prevent the cap 2 from loosening. At this time, the cap 2 is in the position of... Figure 3 The state shown.
[0035] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A threaded rotary structure capable of precisely adjusting the axial clearance of a bearing, installed in a gearbox, characterized in that, include: The gearbox includes a cover, a gear shaft, and a cover fixing mechanism. Mounting holes are provided on both sides of the gearbox. The cover is installed in one of the mounting holes. The gear shaft is located inside the gearbox. One end of the gear shaft extends into the cover, and the other end of the gear shaft extends out of the other mounting hole. The cover fixing mechanism is provided on one side of the gearbox and is connected to the cover.
2. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 1, characterized in that, The outer edge of the cover is marked.
3. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 2, characterized in that, The marking line on one side of the outer wall of the gearbox that matches the mark.
4. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 1, characterized in that, It also includes bearings, with two bearings provided on the outer edge of the gear shaft, one bearing located in the other mounting hole and the other bearing located in the end cap.
5. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 1, characterized in that, The cover fixing mechanism includes a fixing plate, a set screw and a locking nut. The fixing plate is connected to one side of the outer wall of the gearbox, and the fixing plate is connected to the cover through the set screw and the locking nut.
6. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 5, characterized in that, The cover has a first threaded hole, and the fixing plate has a second threaded hole. The first threaded hole and the second threaded hole are directly opposite each other, and the set screw is installed in the first threaded hole and the second threaded hole.
7. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 6, characterized in that, The locking nut is located on the outer edge of the set screw and is threaded into the set screw.
8. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 1, characterized in that, The end cap is threaded into one of the mounting holes.
9. The threaded rotation structure capable of precisely adjusting the axial clearance of a bearing according to claim 5, characterized in that, The fixing plate is connected to the gearbox by bolts.