Locking assembly

Abstract

The utility model relates to a locking assembly. The locking assembly comprises an assembling shaft, a first locking ring and a second locking ring, the assembling shaft is sequentially sleeved with the first locking ring and the second locking ring from inside to outside, external threads are arranged on the outer surface of the assembling shaft, internal threads are arranged on the inner surface of the first locking ring, and the external threads and the internal threads are mutually embedded; the first locking ring comprises a first locking part and a second locking part which are arranged in the axial direction of the assembling shaft, the first locking part comprises a plurality of sub-locking parts which are arranged in the circumferential direction of the assembling shaft at intervals, the inner surface of the second locking ring comprises an abutting face, and the abutting face is located on the side, away from the assembling shaft, of the first locking part and abuts against the first locking part. Therefore, the locking assembly provided by the utility model can provide stable axial pre-tightening force.

Description

Technical Field

[0001] This application relates to the field of bearing technology, and in particular to locking components. Background Technology

[0002] Angular contact bearings are a type of rolling bearing that can withstand both radial and axial loads simultaneously. During the installation of angular contact bearings, a certain amount of axial preload needs to be applied to eliminate bearing clearance and reduce noise and vibration during operation. However, how to provide a stable axial preload to angular contact bearings is a problem that urgently needs to be solved. Utility Model Content

[0003] Therefore, it is necessary to provide a locking assembly that can provide a stable axial preload.

[0004] This application provides a locking assembly, which includes: an assembly shaft, a first locking ring, and a second locking ring. The first locking ring and the second locking ring are sequentially sleeved on the outer side of the assembly shaft from the inside to the outside. The outer surface of the assembly shaft is provided with an external thread, and the inner surface of the first locking ring is provided with an internal thread. The external thread and the internal thread are interlocked.

[0005] The first locking ring includes a first locking part and a second locking part arranged axially along the assembly shaft. The first locking part includes a plurality of sub-locking parts, which are arranged circumferentially along the assembly shaft. The inner surface of the second locking ring includes an abutment surface located on the side of the first locking part away from the assembly shaft and abutting against the first locking part.

[0006] The locking assembly provided in this application embodiment includes a first locking part comprising multiple sub-locking parts, which are arranged at intervals along the circumference of the assembly shaft. The inner surface of the second locking ring includes an abutment surface located on the side of the first locking part away from the assembly shaft and abutting against the first locking part. By dividing the first locking part into multiple sub-locking parts, the circumferential dimension of each sub-locking part along the assembly shaft is relatively small. This allows each sub-locking part to easily deform towards the center of the assembly shaft under the abutment force of the abutment surface, thereby enabling the first locking ring to grip the assembly shaft tightly and alleviate looseness between the first locking ring and the assembly shaft. Consequently, the first locking ring can provide a stable axial preload to the bearing, reducing bearing clearance and thus lowering noise and vibration during bearing operation.

[0007] In one embodiment, the abutting surface has a first distance from the centerline of the assembly shaft, and the outer surface of the first locking part has a second distance from the centerline of the assembly shaft. At least one of the first distance and the second distance gradually increases along the direction from the first locking part to the second locking part.

[0008] In one embodiment, the cross-sectional shape of the abutment surface along the axial direction parallel to the assembly shaft is a first oblique line, and / or, the cross-sectional shape of at least a portion of the outer surface of the first locking part is a second oblique line.

[0009] In one embodiment, the size of the first locking part is smaller than the size of the second locking part along the radial direction of the assembly shaft. The second locking ring includes a third locking part and a fourth locking part arranged along the axial direction of the assembly shaft. The third locking part is sleeved on the outside of the first locking part, and the fourth locking part is sleeved on the outside of the second locking part. The opening size of the third locking part is smaller than the opening size of the fourth locking part.

[0010] And / or, the outer side of the second locking part is provided with multiple grooves, which are arranged at intervals along the circumference of the assembly shaft.

[0011] In one embodiment, there is a gap between two adjacent sub-locking parts;

[0012] The size of the gap is the same everywhere along the direction from the first locking part to the second locking part; or, the size of the gap gradually decreases along the direction from the first locking part to the second locking part.

[0013] And / or, at least two gaps have the same circumferential dimension along the assembly axis;

[0014] And / or, at least two sub-locking parts have the same circumferential dimension along the assembly axis.

[0015] In one embodiment, the plurality of sub-locking portions include a first sub-locking portion and a second sub-locking portion arranged circumferentially along the assembly shaft, wherein the circumferential dimension of the first sub-locking portion along the assembly shaft is greater than the circumferential dimension of the second sub-locking portion along the assembly shaft.

[0016] In one embodiment, the locking assembly includes a cover sleeved on the assembly shaft, the cover being located on the same side of the first locking ring and the second locking ring, and on the side of the second locking portion opposite to the first locking portion;

[0017] The second locking ring has a first positioning part at one end near the cover, and a second positioning part is provided on the cover. One of the first positioning part and the second positioning part is a positioning hole, and the other of the first positioning part and the second positioning part is a positioning protrusion. The positioning protrusion is located in the positioning hole, and the opening size of the positioning hole is larger than the size of the positioning protrusion.

[0018] And / or, the locking assembly includes a connector, a first through hole on the cover, a second through hole on one end of the second locking ring near the cover, the depth direction of the first and second through holes being the same as the axial direction of the assembly shaft, the first and second through holes being arranged opposite to each other along the axial direction of the assembly shaft and communicating with each other, the connecting end of the connector being inserted into the first and second through holes, and the limiting end of the connector abutting against the side of the second locking ring away from the cover.

[0019] In one embodiment, the locking assembly includes a bearing and a bearing housing, which are sequentially sleeved on the outer side of the assembly shaft from the inside to the outside, and are both located on the side of the cover away from the first locking ring. The inner ring of the bearing contacts the outer surface of the assembly shaft, the outer ring of the bearing contacts the inner surface of the bearing housing, and the cover abuts against the inner ring of the bearing.

[0020] In one embodiment, the locking assembly further includes a first collar, which is sleeved on the outside of the assembly shaft and located between the cover and the bearing. The end of the first collar near the bearing extends into the bearing housing, and the cover abuts against the inner ring of the bearing through the first collar.

[0021] In one embodiment, there are at least two bearings, including a first bearing and a second bearing arranged axially along the assembly shaft, with the first bearing located on the side of the second bearing facing the cover, and the cover abutting against the inner ring of the first bearing.

[0022] The locking assembly also includes a second collar, which is sleeved on the outside of the assembly shaft and located between the first bearing and the second bearing. The first bearing and the second bearing abut against each other through the first collar; or, the first bearing and the second bearing are in direct contact. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the locking assembly provided in an embodiment of this application.

[0024] Figure 2 for Figure 1 AA cross-sectional view.

[0025] Figure 3 This is a cross-sectional view of the locking assembly provided in an embodiment of this application.

[0026] Figure 4 A partial cross-sectional view of the locking assembly provided in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the structure of the first locking ring provided in an embodiment of this application.

[0028] Figure 6 This is a structural schematic diagram of the assembly shaft provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Locking assembly; 110. First locking ring; 111. First locking part; 1111. Sub-locking part; 1112. Clearance; 112. Second locking part; 1121. Groove; 120. Second locking ring; 123. Third locking part; 1231. Abutting surface; 124. Fourth locking part; 1242. Second through hole; 130. Assembly shaft; 131. External thread; 132. Protrusion; 140. Cover; 141. First through hole; 150. Connecting piece; 151. Connecting end; 152. Limiting end; 160. Bearing; 161. First bearing; 162. Second bearing; 170. Bearing seat; 181. First collar; 182. Second collar; OA. Centerline. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] In related technologies, a bearing assembly may include a central shaft, a bearing, and a lock nut. The bearing and the lock nut are both sleeved on the outside of the central shaft and are arranged axially along the central shaft. The central shaft and the lock nut are threadedly connected, and the lock nut can be used to provide axial preload to the bearing.

[0038] However, because the central shaft of the threaded connection and the lock nut are prone to loosening, the lock nut cannot provide a stable axial preload to the bearing, resulting in a large bearing clearance, which in turn leads to greater noise and vibration during bearing operation.

[0039] To address the aforementioned problems, this application provides a locking assembly. A first locking portion includes multiple sub-locking portions arranged at intervals along the circumference of the assembly shaft. The inner surface of a second locking ring includes an abutment surface located on the side of the first locking portion away from the assembly shaft and abutting against the first locking portion. Dividing the first locking portion into multiple sub-locking portions results in a smaller circumferential dimension for each sub-locking portion along the assembly shaft. This allows each sub-locking portion to easily deform towards the center of the assembly shaft under the abutment force of the abutment surface, enabling the first locking ring to grip the assembly shaft tightly. This alleviates loosening between the first locking ring and the assembly shaft, allowing the first locking ring to provide a stable axial preload to the bearing, reducing bearing clearance, and thus lowering noise and vibration during bearing operation.

[0040] The following will combine Figures 1-6 The locking component 100 provided in the embodiments of this application will be described.

[0041] See Figure 1 and Figure 2 This application provides a locking assembly 100, which may include an assembly shaft 130 and a first locking ring 110. The first locking ring 110 may be sleeved on the outside of the assembly shaft 130. The outer surface of the assembly shaft 130 is provided with an external thread 131. Figure 6 The inner surface of the first locking ring 110 is provided with an internal thread, and the external thread 131 and the internal thread are engaged with each other, thereby realizing the threaded connection between the first locking ring 110 and the assembly shaft 130.

[0042] For example, see Figure 3 The first locking ring 110 can abut against the bearing 160 through the cover 140 and the first collar 181, thereby providing axial preload to the bearing 160.

[0043] For example, the engagement position of the external thread 131 of the assembly shaft 130 and the internal thread of the first locking ring 110 can be adjusted by rotating the first locking ring 110, i.e. by applying torque to the first locking ring 110, thereby adjusting the magnitude of the preload force, thus making the locking assembly 100 more versatile and adjustable.

[0044] For example, see Figure 4 and Figure 5The first locking ring 110 includes a first locking portion 111 and a second locking portion 112 arranged axially along the assembly shaft 130. The first locking portion 111 includes a plurality of sub-locking portions 1111, which are spaced apart circumferentially along the assembly shaft 130. The locking assembly 100 may include a second locking ring 120, which is sleeved on the outside of the first locking ring 110. The inner surface of the second locking ring 120 includes an abutment surface 1231 located on the side of the first locking portion 111 opposite to the assembly shaft 130, and the abutment surface 1231 abuts against the first locking portion 111. In this way, the first locking part 111 is divided into multiple sub-locking parts 1111, making the circumferential dimension of each sub-locking part 1111 smaller along the assembly shaft 130. This allows each sub-locking part 1111 to easily deform towards the center of the assembly shaft 130 under the abutment force of the abutment surface 1231, thereby enabling the first locking ring 110 to grip the assembly shaft 130 and alleviate any looseness between the first locking ring 110 and the assembly shaft 130. Consequently, the first locking ring 110 can provide a stable axial preload to the bearing 160, reducing the clearance of the bearing 160 and thus reducing noise and vibration during the operation of the bearing 160. Therefore, the locking assembly 100 provided in this embodiment can provide preload and anti-loosening for the bearing 160.

[0045] Compared to related technologies that use double nuts and locking washers for anti-loosening, the double nuts increase installation space, and the nuts used for anti-loosening can still loosen, while the locking washers have installation gaps. In contrast, the embodiment of this application uses the multiple sub-locking parts 1111 of the first locking ring 110 and the abutment surface 1231 of the second locking ring 120, resulting in higher reliability and a more compact installation space structure, thus alleviating the aforementioned problems in related technologies.

[0046] For example, see Figure 4 The second locking ring 120 includes a third locking portion 123 and a fourth locking portion 124 arranged axially along the assembly shaft 130. The third locking portion 123 is sleeved outside the first locking portion 111, and the fourth locking portion 124 is sleeved outside the second locking portion 112. For example, the abutment surface 1231 may be formed from the inner surface of the third locking portion 123.

[0047] In some embodiments, see Figure 4A first distance may exist between the abutment surface 1231 and the center line OA of the assembly shaft 130, and a second distance may exist between the outer surface of the first locking part 111 and the center line OA of the assembly shaft 130. At least one of the first and second distances gradually increases along the direction from the first locking part 111 to the second locking part 112. This facilitates the abutment surface 1231 to provide an abutment force towards the center of the assembly shaft 130 to the outer surface of the first locking part 111. This allows the locking part 1111 to deform towards the center of the assembly shaft 130 under the abutment force of the abutment surface 1231, enabling the first locking ring 110 to grip the assembly shaft 130. This, in turn, allows the first locking ring 110 to provide a stable axial preload to the bearing 160, reducing noise and vibration during bearing 160 operation. Furthermore, this also makes it easier to fit the second locking ring 120 onto the first locking ring 110, thus reducing assembly difficulty.

[0048] For example, the first distance can gradually increase along the direction from the first locking part 111 to the second locking part 112.

[0049] For example, the second distance can gradually increase along the direction from the first locking part 111 to the second locking part 112.

[0050] For example, both the first distance and the second distance can gradually increase along the direction from the first locking part 111 to the second locking part 112.

[0051] For example, see Figure 4 Along the axial direction parallel to the assembly shaft 130, the cross-sectional shape of the abutment surface 1231 can be a first oblique line. The end of the first oblique line away from the fourth locking part 124 is inclined towards the center of the assembly shaft 130 relative to the end of the first oblique line facing the fourth locking part 124. This makes the cross-sectional shape of the abutment surface 1231 relatively simple, which helps to reduce the manufacturing difficulty of the abutment surface 1231.

[0052] For example, the contact surface 1231 can be the first conical surface.

[0053] For example, see Figure 4 Along the axial direction parallel to the assembly shaft 130, the cross-sectional shape of at least a portion of the outer surface of the first locking part 111 can be a second oblique line. The end of the second oblique line away from the second locking part 112 is inclined toward the center of the assembly shaft 130 relative to the end of the second oblique line toward the second locking part 112. This makes the cross-sectional shape of at least a portion of the outer surface of the first locking part 111 simpler, which helps to reduce the manufacturing difficulty of the first locking part 111.

[0054] For example, at least part of the outer surface of the first locking part 111 can be a second conical surface, with the first and second conical surfaces abutting each other.

[0055] In some embodiments, see Figure 5 There may be a gap 1112 between two adjacent sub-locking parts 1111. The gap 1112 can separate the two adjacent sub-locking parts 1111, thereby making the circumferential dimension of the two adjacent sub-locking parts 1111 smaller along the assembly shaft 130. This makes it easier for the two adjacent sub-locking parts 1111 to deform toward the center of the assembly shaft 130 under the action of the abutment force of the abutment surface 1231.

[0056] For example, the size of the gap 1112 can be the same everywhere along the direction from the first locking part 111 to the second locking part 112, so that the shape of the gap 1112 is relatively simple, which helps to reduce the difficulty of manufacturing the gap 1112.

[0057] For example, the size of the gap 1112 gradually decreases along the direction from the first locking part 111 to the second locking part 112, thereby making the size of the end of the sub-locking part 1111 closer to the second locking part 112 larger, which is beneficial to improving the connection stability of the sub-locking part 1111 and the second locking part 112. In addition, the size of the end of the sub-locking part 1111 farther from the second locking part 112 can be smaller, thereby improving the deformation capacity of the sub-locking part 1111. This allows the first locking ring 110 to better grip the assembly shaft 130, thereby alleviating the loosening phenomenon between the first locking ring 110 and the assembly shaft 130 and reducing the noise and vibration during the operation of the bearing 160.

[0058] For example, the clamping force of the first locking ring 110 on the assembly shaft 130 can be adjusted by adjusting the inclination of the first conical surface and / or the second conical surface, making the locking assembly 100 more versatile and adjustable.

[0059] For example, at least two gaps 1112 may have the same circumferential dimension along the assembly shaft 130. For instance, each gap 1112 may have the same circumferential dimension along the assembly shaft 130, so that each sub-locking part 1111 may be evenly distributed in the circumferential direction of the assembly shaft 130, thereby making the locking force applied by each sub-locking part 1111 to the assembly shaft 130 more balanced.

[0060] For example, at least two sub-locking parts 1111 have the same circumferential dimension along the assembly shaft 130, so that the locking force applied by the at least two sub-locking parts 1111 to the assembly shaft 130 is more consistent.

[0061] For example, the plurality of sub-locking parts 1111 may include a first sub-locking part and a second sub-locking part arranged circumferentially along the assembly shaft 130. The circumferential dimension of the first sub-locking part along the assembly shaft 130 may be larger than that of the second sub-locking part along the assembly shaft 130, so that the circumferential dimension of the first sub-locking part along the assembly shaft 130 is larger, thereby making the contact area between the first sub-locking part and the assembly shaft 130 larger. This can avoid the interaction force between the first sub-locking part and the assembly shaft 130 being too concentrated, and make the clamping force of the first sub-locking part on the assembly shaft 130 more balanced, which is beneficial to improving the service life of the first sub-locking part. In addition, it also makes the circumferential dimension of the second sub-locking part smaller, thereby making the deformation capacity of the second sub-locking part stronger, and the internal thread of the second sub-locking part and the external thread 131 of the assembly shaft 130 can be fitted more tightly.

[0062] In some embodiments, see Figure 4 and Figure 5 Along the radial direction of the assembly shaft 130, the size of the first locking part 111 can be smaller than the size of the second locking part 112, and the thickness of the first locking part 111 can be set to be smaller, which is beneficial to improving the deformation capacity of each sub-locking part 1111 of the first locking part 111. In addition, the thickness of the second locking part 112 can be set to be larger, which is beneficial to increasing the contact area between the second locking part 112 and the cover 140, so that the force on the cover 140 is more uniform. The opening size of the third locking part 123 is smaller than the opening size of the fourth locking part 124, so that the fourth locking part 124 can be fitted over the second locking part 112, and the third locking part 123 can be fitted over the first locking part 111. It can also prevent the third locking part 123 and the first locking part 111 from being misaligned, so that the abutment surface 1231 can always abut against the outside of the first locking part 111.

[0063] For example, see Figure 5 The outer side of the second locking part 112 may be provided with a plurality of grooves 1121. The plurality of grooves 1121 may be arranged at intervals along the circumference of the assembly shaft 130. By inserting the corresponding operating protrusion on the tooling into the groove 1121, the first locking ring 110 is rotated by applying external force to the workpiece. The first locking ring 110 is installed and removed by the tooling, and the engagement position between the internal thread of the first locking ring 110 and the external thread 131 of the assembly shaft 130 is adjusted, thereby reducing the difficulty of installing and removing the first locking ring 110.

[0064] In some embodiments, see Figure 3The locking assembly 100 may include a cover 140, which may be sleeved on the outside of the mounting shaft 130 and may be located on the side of the second locking part 112 opposite to the first locking part 111. The first locking ring 110 and the second locking ring 120 are both located on the same side of the cover 140.

[0065] For example, the second locking ring 120 may have a first positioning part at one end near the cover 140 (i.e., the fourth locking part 124), and the cover 140 may have a second positioning part. One of the first positioning part and the second positioning part is a positioning hole, and the other of the first positioning part and the second positioning part is a positioning protrusion located in the positioning hole. By providing the positioning protrusion and the positioning hole, rapid positioning between the second locking ring 120 and the cover 140 can be achieved, which helps to reduce the weight of the first through hole 141 and the second through hole 1242 (…). Figure 4 The difficulty of alignment.

[0066] For example, the opening size of the positioning hole can be larger than the size of the positioning protrusion, allowing the positioning protrusion a certain degree of freedom within the positioning hole. This avoids process errors that could cause issues with the first through hole 141 and the second through hole 1242. Figure 4 (Misalignment may occur.)

[0067] For example, see Figure 2 The locking assembly 100 may include a connector 150. A first through hole 141 may be provided on the cover 140. A second through hole 1242 may be provided on one end of the second locking ring 120 near the cover 140 (i.e., the fourth locking part 124). The depth direction of the first through hole 141 and the second through hole 1242 may be the same as the axial direction of the assembly shaft 130. The first through hole 141 penetrates the cover 140 along the axial direction of the assembly shaft 130, and the second through hole 1242 penetrates the fourth locking part 124 along the axial direction of the assembly shaft 130. The first through hole 141 and the second through hole 1242 are arranged opposite each other along the axial direction of the assembly shaft 130, and the first through hole 141 and the second through hole 1242 are interconnected. The connecting end 151 of the connector 150 can be inserted into the first through hole 141 and the second through hole 1242, and the limiting end 152 of the connector 150 can abut against the side of the fourth locking part 124 away from the cover 140, thereby fixing the second locking ring 120 to the cover 140 through the connector 150.

[0068] For example, the first through hole 141 and the connector 150 can be connected by threads, thereby reducing the difficulty of connection.

[0069] For example, connector 150 can be a screw, bolt, etc.

[0070] In some embodiments, see Figure 2 and Figure 3The locking assembly 100 may include a bearing 160 and a bearing housing 170. The bearing 160 and bearing housing 170 may be sequentially sleeved on the outer side of the assembly shaft 130 from the inside to the outside. Both the bearing 160 and bearing housing 170 may be located on the side of the cover 140 opposite to the first locking ring 110. The inner ring of the bearing 160 contacts the outer surface of the assembly shaft 130, and the outer ring of the bearing 160 contacts the inner surface of the bearing housing 170. The assembly shaft 130 and the bearing housing 170 achieve relative rotation through the bearing 160. For example, the cover 140 and the inner ring of the bearing 160 abut against each other through the first collar 181, and the first locking ring 110 provides axial preload to the bearing 160 through the cover 140 and the first collar 181.

[0071] For example, see Figure 2 and Figure 3 The locking assembly 100 may further include a first collar 181, which is sleeved on the outside of the assembly shaft 130 and may be located between the cover 140 and the bearing 160. The end of the first collar 181 near the bearing 160 extends into the bearing seat 170. The cover 140 abuts against the inner ring of the bearing 160 through the first collar 181. The first locking ring 110 provides axial preload to the bearing 160 through the cover 140 and the first collar 181.

[0072] In other examples, the end of the first collar 181 near the bearing 160 can abut against the outer ring of the bearing 160, and the first locking ring 110 provides axial preload to the bearing 160 through the cover 140 and the first collar 181. This application embodiment mainly uses the abutment of the first collar 181 against the inner ring of the bearing 160 as an example for illustration.

[0073] In some embodiments, see Figure 2 and Figure 3 There may be at least two bearings 160. The at least two bearings 160 may include a first bearing 161 and a second bearing 162 arranged along the axial direction of the assembly shaft 130. The first bearing 161 may be located on the side of the second bearing 162 facing the cover 140. The cover 140 and the inner ring of the first bearing 161 abut against each other through a first collar 181.

[0074] For example, see Figure 2 and Figure 3 The locking assembly 100 may further include a second collar 182, which is sleeved on the outside of the mounting shaft 130, located inside the bearing housing 170, and situated between the first bearing 161 and the second bearing 162, with the first bearing 161 and the second bearing 162 abutting against each other via the second collar 182. For example, at least one of the inner and outer rings of the first bearing 161 may abut against the second collar 182, and at least one of the inner and outer rings of the second bearing 162 may abut against the second collar 182.

[0075] Alternatively, the locking assembly 100 may omit the second collar 182, allowing the first bearing 161 and the second bearing 162 to directly contact each other. This simplifies the structure of the locking assembly 100 and reduces manufacturing costs. For example, the outer rings of the first bearing 161 and the second bearing 162 can directly abut each other.

[0076] For example, bearing 160 can be an angular contact bearing or other bearing.

[0077] For example, the assembly shaft 130 can be a hollow structure.

[0078] For example, see Figure 3 A protrusion 132 is provided on the outer side of the assembly shaft 130. The protrusion 132 is located on the side of the second bearing 162 away from the first bearing 161, and the protrusion 132 can abut against the inner ring of the second bearing 162.

[0079] For example, during the assembly of the locking assembly 100, the bearing 160, the second collar 182, the bearing seat 170, the first collar 181 and the cover 140 can be assembled first, then the first locking ring 110 can be assembled and torque can be applied to the first locking ring 110, then the second locking ring 120 can be assembled, and then the connector 150 can be assembled.

[0080] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A locking assembly, characterized in that, The locking assembly includes: an assembly shaft, a first locking ring, and a second locking ring. The first locking ring and the second locking ring are sequentially sleeved on the outer side of the assembly shaft from the inside to the outside. The outer surface of the assembly shaft is provided with an external thread, and the inner surface of the first locking ring is provided with an internal thread. The external thread and the internal thread are interlocked. The first locking ring includes a first locking portion and a second locking portion arranged axially along the assembly shaft. The first locking portion includes a plurality of sub-locking portions, which are arranged circumferentially at intervals along the assembly shaft. The inner surface of the second locking ring includes an abutment surface located on the side of the first locking portion away from the assembly shaft and abutting against the first locking portion.

2. The locking assembly according to claim 1, characterized in that, The abutting surface has a first distance from the centerline of the assembly shaft, and the outer surface of the first locking part has a second distance from the centerline of the assembly shaft. At least one of the first distance and the second distance gradually increases along the direction from the first locking part to the second locking part.

3. The locking assembly according to claim 2, characterized in that, The cross-sectional shape of the abutment surface along the axial direction parallel to the assembly shaft is a first oblique line, and / or, the cross-sectional shape of at least a portion of the outer surface of the first locking part is a second oblique line.

4. The locking assembly according to any one of claims 1-3, characterized in that, Along the radial direction of the assembly shaft, the size of the first locking part is smaller than the size of the second locking part. The second locking ring includes a third locking part and a fourth locking part arranged along the axial direction of the assembly shaft. The third locking part is sleeved on the outside of the first locking part, and the fourth locking part is sleeved on the outside of the second locking part. The opening size of the third locking part is smaller than the opening size of the fourth locking part. And / or, the outer side of the second locking part is provided with a plurality of grooves, the plurality of grooves being arranged at intervals along the circumference of the assembly shaft.

5. The locking assembly according to any one of claims 1-3, characterized in that, There is a gap between two adjacent sub-locking parts; The size of the gap is the same everywhere along the direction from the first locking part to the second locking part; or, the size of the gap gradually decreases along the direction from the first locking part to the second locking part. And / or, at least two of the gaps have the same circumferential dimension along the assembly axis; And / or, at least two of the said sub-locking parts have the same circumferential dimension along the assembly axis.

6. The locking assembly according to any one of claims 1-3, characterized in that, The plurality of sub-locking parts include a first sub-locking part and a second sub-locking part arranged circumferentially along the assembly shaft, wherein the circumferential dimension of the first sub-locking part along the assembly shaft is greater than the circumferential dimension of the second sub-locking part along the assembly shaft.

7. The locking assembly according to any one of claims 1-3, characterized in that, The locking assembly includes a cover body, which is sleeved on the assembly shaft. The cover body is located on the same side of the first locking ring and the second locking ring, and is located on the side of the second locking portion opposite to the first locking portion. The second locking ring has a first positioning part at one end near the cover, and the cover has a second positioning part. One of the first positioning part and the second positioning part is a positioning hole, and the other of the first positioning part and the second positioning part is a positioning protrusion. The positioning protrusion is located in the positioning hole, and the opening size of the positioning hole is larger than the size of the positioning protrusion. And / or, the locking assembly includes a connector, the cover has a first through hole, the second locking ring has a second through hole at one end near the cover, the depth direction of the first through hole and the second through hole is the same as the axial direction of the assembly shaft, the first through hole and the second through hole are arranged opposite to each other along the axial direction of the assembly shaft and are interconnected, the connecting end of the connector is inserted into the first through hole and the second through hole, and the limiting end of the connector abuts against the side of the second locking ring away from the cover.

8. The locking assembly according to claim 7, characterized in that, The locking assembly includes a bearing and a bearing housing. The bearing and the bearing housing are sequentially sleeved on the outer side of the assembly shaft from the inside to the outside, and are both located on the side of the cover away from the first locking ring. The inner ring of the bearing is in contact with the outer surface of the assembly shaft, the outer ring of the bearing is in contact with the inner surface of the bearing housing, and the cover abuts against the inner ring of the bearing.

9. The locking assembly according to claim 8, characterized in that, The locking assembly further includes a first collar, which is sleeved on the outside of the assembly shaft and located between the cover and the bearing. The end of the first collar near the bearing extends into the bearing housing, and the cover abuts against the inner ring of the bearing through the first collar.

10. The locking assembly according to claim 8, characterized in that, The bearing is at least two, and the at least two bearings include a first bearing and a second bearing arranged axially along the assembly shaft, the first bearing being located on the side of the second bearing facing the cover, and the cover abutting against the inner ring of the first bearing; The locking assembly further includes a second collar, which is sleeved on the outside of the assembly shaft and located between the first bearing and the second bearing, with the first bearing and the second bearing abutting each other through the second collar; or, the first bearing and the second bearing are in direct contact.

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