Shafting locking device and power system

Abstract

This application provides a shaft locking device and a power system. The shaft locking device includes: a shaft body, a first connecting hole at a first end of the shaft body, and a boss circumferentially provided at a predetermined distance from the end face of the first end; a bearing assembly, sleeved on the shaft body, with one end face of the bearing assembly located near the boss surface at the first end of the shaft body; a locking assembly, including a limiting sleeve and a connecting member; the limiting sleeve is installed at the first end of the shaft body and contacts the other end face of the bearing assembly; the connecting member, one end of which passes through the first connecting hole and locks with the shaft body, and the other end of which forms a fastening part for locking the limiting sleeve to the end face of the first end of the shaft body. The shaft locking device provided by this application can improve the stability of the connection between the shaft body, the bearing assembly, and the locking assembly.

Description

Technical Field

[0001] This application relates to the field of mechanical assembly technology, and in particular to a shaft locking device and a power system. Background Technology

[0002] In existing technologies, a shaft connection bearing is used to support the shaft body and reduce the coefficient of friction during shaft movement. When the shaft body and bearing are directly connected by threads, the load is transmitted through the threads, and the threaded fit is prone to loosening. When the shaft body and bearing are directly fixed by welding, the welding process can easily cause thermal stress cracks in the shaft body and bearing, reducing their corrosion resistance and compromising the stability of the connection. Summary of the Invention

[0003] This application provides a shaft locking device and a power system, which aims to improve the stability of the connection between the shaft body and the bearing in the shaft locking device.

[0004] An embodiment of the first aspect of this application provides a shaft locking device, the device comprising: The shaft body has a first connecting hole at its first end and a boss at a predetermined distance from the end face of the first end in the circumferential direction of the shaft body. A bearing assembly is fitted onto the shaft body, and one end face of the bearing assembly is located near the boss surface of the first end of the shaft body; The locking assembly includes a limiting sleeve and a connector; the limiting sleeve is installed at the first end of the shaft body and contacts the other end face of the bearing assembly; the connector has one end passing through the first connecting hole and locking with the shaft body, and the other end forming a fastening part for locking the limiting sleeve to the end face of the first end of the shaft body.

[0005] In some embodiments, the limiting sleeve includes an abutting portion and a pressing portion; The abutting portion is located at the first end of the shaft body and contacts the other end face of the bearing assembly; The clamping part contacts the first end face of the shaft body and forms a first cavity communicating with the first connecting hole. The fastening part abuts against the clamping part through the first cavity.

[0006] In some embodiments, the connector includes a connecting sleeve and a fastener; The connecting sleeve is threaded both inside and outside, and is fixedly connected to the shaft body through the external thread engaging with the thread of the first connecting hole; The fastener is fixedly connected to the connecting sleeve via the internal thread of the connecting sleeve to lock the clamping part to the end face of the first end of the shaft body.

[0007] In some embodiments, the fastener has a head boss and a connecting portion, the connecting portion being fixedly connected to the connecting sleeve via the internal thread of the connecting sleeve to lock the clamping portion between the end face of the first end of the shaft body and the head boss.

[0008] In some embodiments, the locking assembly further includes a locking pin for connecting the connecting sleeve and the shaft body.

[0009] In some embodiments, the surface of the locking pin near the shaft body is a smooth surface, and / or the surface of the locking pin near the connecting sleeve is a smooth surface.

[0010] In some embodiments, the connecting sleeve includes a main body and a self-locking part. The main body is provided with threads on both its inner and outer surfaces, and the self-locking part has smooth surfaces on both its inner and outer surfaces. The wall thickness of the self-locking part is thinner than that of the main body so that the self-locking part can expand under the action of the fastener to achieve self-locking.

[0011] In some embodiments, the device further includes a support base; The support seat is sleeved on the shaft body and includes a seat body and a housing. The housing forms a second cavity around the shaft body, and the bearing assembly is housed in the second cavity.

[0012] In some embodiments, the bearing assembly includes an inner ring, an outer ring, and rolling elements; The inner ring is sleeved on the shaft body and fixed between the boss and the locking assembly, while the outer ring is fixed to the seat body; The linear expansion coefficient of the inner ring is less than that of the shaft body, and the linear expansion coefficient of the outer ring is greater than that of the support base.

[0013] An embodiment of the second aspect of this application provides a power system, the power system including a shaft locking device and a power device, the shaft locking device being configured as described above; The power equipment is connected to the shaft body of the shaft locking device and is configured to output driving force to the shaft body to drive the shaft body to perform a preset action.

[0014] In the shaft locking device and power system provided in this application embodiment, a locking assembly is provided, which includes a limiting sleeve and a connecting member. The limiting sleeve is installed at the first end of the shaft body and contacts the other end of the bearing assembly. The bearing assembly is sleeved on the shaft body, and one end face of the bearing assembly is located near the boss surface near the first end of the shaft body. This limits the bearing assembly between the boss and the limiting sleeve, thereby limiting the bearing assembly and the shaft body to be relatively fixed in the axial direction of the shaft body. By providing the connecting member, one end of the connecting member passes through the first connecting hole at the first end of the shaft body and locks with the shaft body, thereby fixing the shaft body and the locking assembly to be relatively fixed, avoiding or reducing the impact on the shaft body, the connecting member, and the limiting sleeve. The locating sleeve rotates circumferentially or moves axially along the shaft body. A fastening part is formed at the other end of the connecting piece to lock the locating sleeve to the end face of the first end of the shaft body, thus locking the locating sleeve and the shaft body. The locating sleeve and the shaft body are locked together by the fastening part. If the locating sleeve and the shaft body become loose during use, they can be locked by tightening the fastening part and the connecting piece, or by replacing the connecting piece. The locating sleeve and the shaft body eliminate the need for direct threaded or welded connections, thereby reducing the load transmitted by the locating sleeve and the shaft body through the thread, eliminating the thermal stress cracks generated by the locating sleeve and the shaft body, and improving the stability of the connection between the shaft body, bearing assembly, and locking assembly. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a shaft locking device provided in an embodiment of this application; Figure 2 This is a partial cross-sectional structural schematic diagram of a shaft locking device provided in an embodiment of this application; Figure 3 This is a partial cross-sectional structural schematic diagram of a shaft locking device provided in an embodiment of this application; Figure 4 This is a three-dimensional structural diagram of a shaft locking device provided in this application embodiment, showing the locking pin not being inserted into the insertion port of the limiting sleeve; Figure 5 This is a three-dimensional structural diagram of a fastener for a shaft locking device provided in an embodiment of this application; Figure 6 This is a partial cross-sectional structural schematic diagram of a shaft locking device provided in an embodiment of this application; Figure 7 This is a three-dimensional structural diagram of a limiting sleeve for a shaft locking device provided in an embodiment of this application.

[0017] Explanation of reference numerals in the attached figures: 1. Shaft body; 111. End face of the first end; 112. First internal thread; 12. Boss; 13. First connecting hole; 2. Bearing assembly; 21. Inner ring; 22. Outer ring; 23. Rolling element; 24. Rolling track; 3. Locking assembly; 30. Connector; 31. Limiting sleeve; 311. First cavity; 312. Pressing part; 313. Abutting part; 314. Receiving hole; 32. Connecting sleeve; 321. Insert; 322. Main body; 3221. First external thread; 3222. Second internal thread; 323. Self-locking part; 324. Third connecting hole; 33. Fastener; 331. Connecting part; 3311. Second external thread; 332. Head boss; 333. Groove; 34. Locking pin; 4. Support base; 41. Base body; 42. Shell; 43. Second cavity; X, axial direction; Y, radial direction; Z, circumferential direction. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. It should be noted that, unless otherwise specified, different features in the embodiments of this application can be combined with each other.

[0021] When using terms such as "above," "above," "below," "below," or "relative" to define the positional relationship between two elements, this includes not only the state where the two elements are directly connected, but also the state where the two elements are separated by gaps or other elements. Furthermore, the terms "first," "second," and "third," etc., are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0022] Please see Figure 1 , Figure 2 and Figure 3 This application provides a shaft locking device, which includes a shaft body 1, a bearing assembly 2, and a locking assembly 3. The first end of the shaft body 1 is provided with a first connecting hole 13, and a boss 12 is provided in the circumferential direction Z at a predetermined distance from the end face 111 of the first end. The bearing assembly 2 is sleeved on the shaft body 1, and one end face of the bearing assembly 2 is located near the boss surface of the first end of the shaft body 1 and can contact the boss 12. The locking assembly 3 includes a limiting sleeve 31 and a connecting member 30. The limiting sleeve 31 is installed on the first end of the shaft body 1, for example, covering the side of the end face 111 of the first end away from the boss 12. The limiting sleeve 31 can also contact the other end face of the bearing assembly 2. One end of the connecting member 30 passes through the first connecting hole 13 and is locked to the shaft body 1, for example, by interference fit. The other end of the connecting member 30 forms a fastening part for locking the limiting sleeve 31 to the end face 111 of the first end of the shaft body 1.

[0023] The shaft body 1 can be a rotating shaft, a connecting shaft, a supporting shaft, etc., and can have functions such as transmitting torque and supporting rotating parts. The shaft body 1 can be a rod-shaped structure extending along a first direction, which is the axial direction X of the shaft body 1. The boss 12 can protrude from the outer surface of the shaft body 1 along the radial direction Y of the shaft body 1. The boss 12 can be an annular stepped structure surrounding the shaft body 1, or the boss 12 can include multiple spaced stepped structures arranged around the shaft body 1 in the circumferential direction Z. The shaft body 1 and the boss 12 can be integrally formed to improve the stability of the connection between the shaft body 1 and the boss 12. The shaft body 1 and the boss 12 can also be manufactured separately and then assembled into a whole to reduce the manufacturing difficulty.

[0024] The first end face 111 is the two end faces of the shaft body 1 along the axial direction X. The first end face 111 may be provided with a first connecting hole 13 along the axial direction X. The first connecting hole 13 and the shaft body 1 may be coaxially arranged.

[0025] The bearing assembly 2 can be a rolling bearing, a sliding bearing, or other bearing. The bearing assembly 2 can support the shaft body 1 and reduce the coefficient of friction during the rotation of the shaft body 1. The bearing assembly 2 has a ring-shaped structure, which allows the bearing assembly 2 to be sleeved from one end of the shaft body 1 along the axial direction X to the first end of the shaft body 1. Since the boss 12 protrudes from the shaft body 1, the boss 12 can limit the movement of the bearing assembly 2 along the axial direction X of the shaft body 1 and limit the bearing assembly 2 to be located on the side of the end face 111 of the boss 12 near the first end.

[0026] The locking assembly 3 can lock the shaft body 1 and the bearing assembly 2, preventing or reducing loosening of the shaft body 1 and the bearing assembly 2 along the axial direction (X) of the shaft body 1. The locking assembly 3 includes a limiting sleeve 31 and a connecting member 30. The limiting sleeve 31 is installed at the first end of the shaft body 1 and contacts the other end of the bearing assembly 2. The bearing assembly 2 is sleeved on the shaft body 1, and one end face of the bearing assembly 2 is located near the boss surface of the first end of the shaft body 1. This allows the bearing assembly 2 to be limited between the boss 12 and the limiting sleeve 31, thus limiting the movement of the bearing assembly 2 along the axial direction (X) of the shaft body 1. One end of the connecting member 30 is located in the first connecting hole 13, and can pass through the first connecting hole 13 and lock with the shaft body 1. The connecting member 30 can be locked with the shaft body 1 by means of threaded connection, interference fit connection, etc., preventing or reducing movement between the connecting member 30 and the shaft body 1 along the axial direction (X) or radial direction (Y) of the shaft body 1. The other end of the connector 30 forms a fastening part, which can lock the limiting sleeve 31 to the end face 111 of the first end of the shaft body 1, thereby locking the limiting sleeve 31 and the shaft body 1. The limiting sleeve 31 and the shaft body 1 are locked together by the fastening part.

[0027] During the use of the shaft locking device, the tightness of the limiting sleeve 31 and the connecting piece 30 can be checked to ensure that the limiting sleeve 31 abuts against the bearing assembly 2, preventing the bearing assembly 2 from shifting axially along the shaft body 1. The stability of the device can also be ensured by periodically checking the preload of the fastening parts and the locking status of the connecting piece 30 and the shaft body 1. If the connecting piece 30 is found to be loose, it can be replaced or the fastening parts and the connecting piece 30 can be tightened to restore the locking effect, thus eliminating the need to replace the shaft body 1 and reducing operating costs.

[0028] In this application, a locking assembly 3 is provided, which includes a limiting sleeve 31 and a connecting member 30. The limiting sleeve 31 is installed at the first end of the shaft body 1 and contacts the other end of the bearing assembly 2. The bearing assembly 2 is sleeved on the shaft body 1, and one end face of the bearing assembly 2 is located near the boss surface of the first end of the shaft body 1. This limits the bearing assembly 2 between the boss 12 and the limiting sleeve 31, thereby limiting the bearing assembly 2 and the shaft body 1 to be relatively fixed in the axial direction X of the shaft body 1. The connecting member 30 is provided, and one end of the connecting member 30 passes through... The first connecting hole 13 at the first end of the shaft body 1 is locked to the shaft body 1, thereby fixing the shaft body 1 and the locking assembly 3 relative to each other, avoiding or reducing the rotation of the shaft body 1, the connecting piece 30 and the limiting sleeve 31 along the circumferential Z direction of the shaft body 1 or the axial X direction of the shaft body 1; by setting the other end of the connecting piece 30 to form a fastening part, the limiting sleeve 31 is locked to the end face 111 of the first end of the shaft body 1, which can lock the limiting sleeve 31 and the shaft body 1; the overall limiting sleeve 31 and the shaft body 1 are locked by the fastening part, which also helps to fasten the limiting of the bearing assembly 2. If the limiting sleeve 31 and the shaft body 1 become loose during use, the limiting sleeve 31 and the shaft body 1 can be locked by tightening the fastening part and the connecting piece 30, or by replacing the connecting piece 30. The limiting sleeve 31 and the shaft body 1 eliminate the need for direct threaded or welded connections, thereby reducing the load transmission between the limiting sleeve 31 and the shaft body 1 through the thread, eliminating the thermal stress cracks generated by the limiting sleeve 31 and the shaft body 1, and improving the stability of the connection between the shaft body 1, the bearing assembly 2 and the locking assembly 3.

[0029] Please refer to the following: Figure 6 and Figure 7 In some embodiments, the limiting sleeve 31 includes an abutment portion 313 and a clamping portion 312. The abutment portion 313 is located at a first end of the shaft body 1 and contacts the other end face of the bearing assembly 2. The clamping portion 312 contacts the end face 111 of the first end of the shaft body 1 and forms a first cavity 311 communicating with the first connecting hole 13. The fastening portion abuts against the clamping portion 312 through the first cavity 311.

[0030] The abutment portion 313 is disposed at one end of the shaft body 1, with one end abutting against the bearing assembly 2 and the other end connected to the clamping portion 312, which can play a limiting role, so that the bearing assembly 2 is limited between the boss 12 and the abutment portion 313. The clamping portion 312 can be an end cap, and the clamping portion 312 is located on one side of the end face 111 of the first end. The clamping portion 312 has a first cavity 311 communicating with the first connecting hole 13. The first cavity 311 can be in the form of a second connecting hole. The limiting sleeve 31 defines that the surface of the second connecting hole 311 can be a smooth surface or have threads adapted to the fastener 33. The fastening part / connector 30 can be inserted into the first cavity 311 and the first connecting hole 13 in sequence. The fastening part / connector 30 can lock the limiting sleeve 31 by means of threaded connection, interference connection, abutment, etc., and can also help to improve the locking of the shaft body 1, avoid or reduce the movement of the shaft body 1 along the axial direction X or radial direction Y between the shaft body 1 and the limiting sleeve 31.

[0031] It should also be noted that the setting of the abutment part 313 makes the boss 12, the bearing assembly 2 and the abutment part 313 form a limiting and locking structure. At the same time, the fastening part and the pressing part 312 and the first end of the shaft body 1 form a limiting and locking structure. In addition, the connecting piece 30 locks to the shaft body 1 through the first connecting hole 13, forming a multi-level locking structure, which is beneficial to the connection stability of each component.

[0032] The clamping part 312 and the abutting part 313 can be integrally formed. The clamping part 312 is also located on the first side of the first end face 111, and the clamping part 312 can also cover the end face 111 of the first end and cover the first connecting hole 13. The abutting part 313 can be arranged around the shaft body 1. During installation, the fastening part pushes the clamping part 312 to fit against the end face 111 of the first end, and the clamping part 312 drives the abutting part 313 to move along the axial X-direction boss 12 of the shaft body 1 until the abutting part 313 abuts against the bearing assembly 2. By setting the clamping part 312 and the abutting part 313, external impurities are prevented from entering the first connecting hole 13, and the movement of the bearing assembly 2 along the axial X-direction of the shaft body 1 can also be effectively limited.

[0033] In some embodiments, the limiting sleeve 31 further includes a receiving hole 314 communicating with the first cavity 311, and the fastening part is received within the receiving hole 314. The receiving hole 314 can be a countersunk hole. The fastening part is received within the receiving hole 314, thereby preventing external forces from damaging the fastening part.

[0034] Please refer to the following: Figures 3 to 5In some embodiments, the connector 30 includes a connecting sleeve 32 and a fastener 33; the connecting sleeve 32 is threaded both inside and outside, and is fixedly connected to the shaft body 1 by the external thread engaging with the thread of the first connecting hole 13; the fastener 33 is fixedly connected to the connecting sleeve 32 by the internal thread of the connecting sleeve 32 to lock the pressing part 312 to the end face 111 of the first end of the shaft body 1.

[0035] The fastener 33 serves as the fastening part of the connector 30, which can lock the limiting sleeve 31. The connecting sleeve 32 is threadedly connected to the first connecting hole 13 of the shaft body 1 through the external thread, and can be locked with the shaft body 1.

[0036] The surface of the shaft body 1 defining the first connecting hole 13 can be provided with a first internal thread 112. The external thread provided by the connecting sleeve 32 near the outer surface of the shaft body 1 can be called the first external thread 3221. The first internal thread 112 and the first external thread 3221 are adapted to each other, so that the connecting sleeve 32 and the shaft body 1 can be threadedly connected through the first internal thread 112 and the first external thread 3221.

[0037] Accordingly, the fastener 33 may have a second external thread 3311, and the connecting sleeve 32 has a third connecting hole 324 with an internal thread. The internal thread of the connecting sleeve 32 / third connecting hole 324 can be called a second internal thread 3222, which is located on the surface defining the third connecting hole 324. The second external thread 3311 and the second internal thread 3222 engage. The fastener 33 rotates into the third connecting hole 324, and the fastener 33 achieves threaded connection with the connecting sleeve 32 through the second external thread 3311 and the second internal thread 3222, thereby locking the clamping part 312 to the end face 111 of the first end of the shaft body 1. Optionally, the first connecting hole 13 and the third connecting hole 324 are coaxially arranged.

[0038] When the fastener 33 applies pressure along the axial direction X of the shaft body 1 to the connecting sleeve 32, the fastener 33 also applies pressure along the axial direction X of the shaft body 1 to the limiting sleeve 31, so that the limiting sleeve 31 abuts against the bearing assembly 2, thereby avoiding or reducing the movement of the limiting sleeve 31 and the shaft body 1 along the axial direction X or radial direction Y.

[0039] In some embodiments, the fastener 33 includes a connecting portion 331 and a head boss 332, which are connected together. The connecting portion 331 is fixedly connected to the connecting sleeve 32 via the internal thread of the connecting sleeve 32, namely the second internal thread 3222, to lock the clamping portion 312 between the end face 111 of the first end of the shaft body 1 and the head boss 332.

[0040] The connecting part 331 and the head boss 332 can be integrally formed. The connecting part 331, the connecting sleeve 32, and the shaft body 1 can be coaxially arranged. The head boss 332 is located outside the first connecting hole 13. The part of the limiting sleeve 31, namely the clamping part 312, is located between the end face 111 of the first end of the shaft body 1 and the head boss 332 and abuts against the head boss 332, thereby fastening the limiting sleeve 31 with the head boss 332. The connecting part 331 is inserted into the second connecting hole 311 and the third connecting hole 324 and is threadedly connected to the connecting sleeve 32 to realize the connection between the fastener 33 and the connecting sleeve 32. It can also lock the clamping part 312 between the end face 111 of the first end of the shaft body 1 and the head boss 332.

[0041] The connecting part 331 can be a connecting rod, and the head boss 332 can be an end cap. The head boss 332 can be provided with a groove 333 to facilitate placing a tool in the groove 333. Rotating the tool will drive the fastener 33 to rotate, thereby achieving a threaded connection between the fastener 33 and the connecting sleeve 32. Optionally, the fastener 33 is an internal hex bolt.

[0042] Please refer to the following: Figure 4 In some embodiments, the locking assembly 3 further includes a locking pin 34, which can connect the connecting sleeve 32 and the shaft body 1. The end face 111 of the connecting sleeve 32 near the first end of the shaft body 1 may be provided with a socket 321. When the shaft locking device is installed, the locking pin 34 is located in the first connecting hole 13 and inserted into the socket 321. The locking pin 34 limits the relative rotation of the connecting sleeve 32 and the shaft body 1, and can lock the connecting sleeve 32 and the shaft body 1 through an interference fit.

[0043] The outer surface of the connecting sleeve 32 is recessed to form a socket 321. One end of the socket 321 is open towards the second connecting hole 311. After the connecting sleeve 32 is placed in the first connecting hole 13 and the connecting sleeve 32 and the shaft body 1 are fixed, the locking pin 34 is inserted into the socket 321. The locking pin 34 is located between the connecting sleeve 32 and the shaft body 1 and abuts against the connecting sleeve 32 and the shaft body 1, thereby restricting the connecting sleeve 32 from rotating relative to the shaft body 1 in the circumferential direction Z of the shaft body 1.

[0044] In some embodiments, the connecting sleeve 32 and the shaft body 1 are threadedly connected, and the surface of the locking pin 34 near the shaft body 1 is a smooth surface. The smooth surface of the locking pin 34 near the shaft body 1 facilitates the insertion of the locking pin 34 into the insertion port 321 of the threaded shaft body 1 and the connecting sleeve 32.

[0045] And / or, the surface of the locking pin 34 near the connecting sleeve 32 is a smooth surface, thereby facilitating the insertion of the locking pin 34 into the socket 321 of the threaded shaft body 1 and the connecting sleeve 32.

[0046] In some embodiments, the connecting sleeve 32 includes a main body 322 and a self-locking part 323. The main body 322 is threaded both inside and outside, and the self-locking part 323 has smooth surfaces both inside and outside. The wall thickness of the self-locking part 323 is thinner than that of the main body 322 so that the self-locking part 323 can expand under the action of the fastener 33 to achieve self-locking.

[0047] The outer surface of the main body 322 has a first external thread 3221 that connects to the shaft body 1. The self-locking part 323 is more recessed than the outer surface of the main body 322 and more protruding than the inner surface of the main body 322. The self-locking part 323 can be spaced apart from the main body 322. In general, along the radial Y of the connecting sleeve 32, the thickness of the self-locking part 323 is less than the thickness of the main body 322, that is, the thickness of the self-locking part 323 is thinner.

[0048] Because the thickness of the self-locking part 323 is less than the thickness of the main body 322, when the locking pin 34 is inserted into the insertion port 321 of the threaded shaft body 1 and the connecting sleeve 32, or when the connecting sleeve 32 provided in the first connecting hole 13 is struck, the self-locking part 323 deforms, causing the first external thread 3221 and the first internal thread 112 to misalign. Furthermore, because the inner surface of the self-locking part 323 protrudes more towards the axis than part of the inner surface of the main body 322, when the fastener 33 fastens the limiting sleeve 31 and the connecting sleeve 32 through the second internal thread 3222, the radius of the annular cavity formed on the inner surface of the self-locking part 323 is smaller than the radius of the fastener 33. Under the continuous action of torque on the fastener 33, the fastener 33 will cause the inner and outer surfaces of the self-locking part 323 to expand away from the axis to achieve self-locking, thereby reducing or preventing the connecting sleeve 32 from rotating relative to the shaft body 1 in the circumferential direction Z of the shaft body 1.

[0049] Optionally, when the self-locking part 323 is not deformed, the self-locking part 323 is spaced apart from the shaft body 1, and the surface of the self-locking part 323 near the shaft body 1 can be a smooth surface. Optionally, the self-locking part 323 is annular and arranged around the central axis of the connecting sleeve 32.

[0050] Please continue reading. Figures 1 to 3In some embodiments, the shaft locking device further includes a support seat 4, which is sleeved on the shaft body 1, for example, on the outside of the bearing assembly 2. The support seat 4 includes a base 41 and a housing 42. The housing 42 can form a second cavity 43 around the shaft body 1, and the bearing assembly 2 is housed in the second cavity 43. The base 41 can provide support and can be located on the side of the shaft body 1 away from the first end face 111. The base 41 and the housing 42 can be integrally formed. The support seat 4 / base 41 can be fixed to the ground, a bracket, or other device, allowing the shaft body 1 to rotate relative to the ground, bracket, or other device. The housing 42 can protect the bearing assembly 2, and the entire housing 42 encloses the bearing assembly 2 in the circumferential direction Z of the shaft body 1.

[0051] In some embodiments, the bearing assembly 2 includes an inner ring 21, an outer ring 22, and rolling elements 23. The inner ring 21 is sleeved on the shaft body 1, for example, on the outside of the shaft body 1. The inner ring 21 is fixed between the boss 12 and the locking assembly 3, for example, the inner ring 21 is limited between the boss 12 and the limiting sleeve 31. The outer ring 22 is sleeved on the outside of the inner ring 21. The outer ring 22 can be fixed to the seat 41, so that the support seat 4 supports the outer ring 22. The linear expansion coefficient of the outer ring 22 is greater than the linear expansion coefficient of the support seat 4. The inner ring 21 and the outer ring 22 enclose to form a rolling track 24, and the rolling elements 23 are slidably disposed within the rolling track 24.

[0052] The bearing assembly 2 includes an inner ring 21, an outer ring 22, and rolling elements 23. The bearing assembly 2 is a rolling bearing, and the rolling elements 23 reduce the coefficient of friction between the inner ring 21 and the outer ring 22 during relative rotation. The inner ring 21 is positioned between the boss 12 and the limiting sleeve 31 / locking assembly 3, so that the inner ring 21, the shaft body 1, and the locking assembly 3 are relatively fixed.

[0053] The linear expansion coefficient of the outer ring 22 is greater than that of the support 4, which makes the deformation of the outer ring 22 as the temperature rises greater than that of the support 4 as the temperature rises, thereby improving the stability of the outer ring 22 and the support 4.

[0054] In some embodiments, the coefficient of linear expansion of the inner ring 21 is less than that of the shaft body 1. When using the shaft locking device, because the coefficient of linear expansion of the inner ring 21 is less than that of the shaft body 1, the deformation of the inner ring 21 as the temperature rises is less than that of the shaft body 1 as the temperature rises, thereby improving the stability of the inner ring 21 and the shaft body 1 being fitted together.

[0055] Optionally, the material of the shaft body 1 includes metal materials such as aluminum and aluminum alloy, which makes the shaft body 1 lightweight.

[0056] The shaft locking device provided in this application can be used in mechanical fields where rigidity and lightweight are required. For example, precision instruments such as industrial machinery and aerospace equipment.

[0057] This application also provides a power system including a shaft locking device and a power unit. The shaft locking device is configured as the shaft locking device described in the above embodiments. The power unit can be drivenly connected to the shaft body of the shaft locking device and can output driving force to the shaft body to drive the shaft body to perform a preset action. The preset action may be driving the shaft body to rotate circumferentially, or other actions. Since the above power system has all the technical features of the above-described shaft locking device, it also has all the aforementioned beneficial effects.

[0058] 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.

[0059] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0060] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A shafting locking device, characterized by, The device includes: The shaft body has a first connecting hole at its first end and a boss at a predetermined distance from the end face of the first end in the circumferential direction of the shaft body. A bearing assembly is fitted onto the shaft body, and one end face of the bearing assembly is located near the boss surface of the first end of the shaft body; The locking assembly includes a limiting sleeve and a connector; the limiting sleeve is installed at the first end of the shaft body and contacts the other end face of the bearing assembly; the connector has one end passing through the first connecting hole and locking with the shaft body, and the other end forming a fastening part for locking the limiting sleeve to the end face of the first end of the shaft body.

2. The shafting locking device according to claim 1, wherein The limiting sleeve includes an abutting part and a pressing part; The abutting portion is located at the first end of the shaft body and contacts the other end face of the bearing assembly; The clamping part contacts the first end face of the shaft body and forms a first cavity communicating with the first connecting hole. The fastening part abuts against the clamping part through the first cavity.

3. The shafting locking device according to claim 2, wherein The connector includes a connecting sleeve and fasteners; The connecting sleeve is threaded both inside and outside, and is fixedly connected to the shaft body through the external thread engaging with the thread of the first connecting hole; The fastener is fixedly connected to the connecting sleeve via the internal thread of the connecting sleeve to lock the clamping part to the end face of the first end of the shaft body.

4. The shafting locking device according to claim 3, wherein The fastener has a head boss and a connecting part. The connecting part is fixedly connected to the connecting sleeve through the internal thread of the connecting sleeve to lock the clamping part between the end face of the first end of the shaft body and the head boss.

5. The shafting locking device of claim 3, wherein The locking assembly also includes a locking pin for connecting the connecting sleeve and the shaft body.

6. The shafting locking device according to claim 5, wherein The surface of the locking pin near the shaft body is a smooth surface, and / or the surface of the locking pin near the connecting sleeve is a smooth surface.

7. The shaft locking device according to claim 3, characterized in that, The connecting sleeve includes a main body and a self-locking part. The main body is provided with threads on both its inner and outer surfaces, and the self-locking part has smooth surfaces on both its inner and outer surfaces. The wall thickness of the self-locking part is thinner than that of the main body so that the self-locking part can expand under the action of the fastener to achieve self-locking.

8. The shaft locking device according to claim 1, characterized in that, The device further includes a support base; the support base is sleeved on the shaft body and includes a base body and a housing, the housing forming a second cavity around the shaft body, and the bearing assembly is housed in the second cavity.

9. The shaft locking device according to claim 8, characterized in that, The bearing assembly includes an inner ring, an outer ring, and rolling elements; The inner ring is sleeved on the shaft body and fixed between the boss and the locking assembly, while the outer ring is fixed to the seat body; The linear expansion coefficient of the inner ring is less than that of the shaft body, and the linear expansion coefficient of the outer ring is greater than that of the support base.

10. A power system, characterized in that, The power system includes a shaft locking device and a power unit, wherein the shaft locking device is configured as a shaft locking device as described in any one of claims 1 to 9; The power equipment is connected to the shaft body of the shaft locking device and is configured to output driving force to the shaft body to drive the shaft body to perform a preset action.

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