Anti-fracture motor shaft sleeve

Abstract

This utility model discloses a motor shaft anti-breakage sleeve, comprising an outer locking sleeve, an inner tightening sleeve, and a balance ring assembly. The outer locking sleeve has a threaded inner cavity, and the inner tightening sleeve has a mating thread and ratchet limiting structure on its exterior. The surface of the inner tightening sleeve has a deformation gap to achieve radial elastic adjustment. The bottom of the outer locking sleeve has a slip ring groove, in which a slip ring with a counterweight is slidably installed. During assembly, the sleeve achieves self-locking through the tapered thread engagement and the ratchet limiting structure. Furthermore, the overall center of gravity can be adjusted by sliding the counterweight according to the dynamic eccentricity of the motor shaft, thus providing multiple functions including shaft protection, anti-loosening locking, and rotational dynamic balance adjustment. This structure is easy to install, highly adaptable, and can effectively improve the operational stability and service life of high-speed motor shafts.

Description

Technical Field

[0001] This utility model relates to the field of motor shaft sleeve technology, specifically a motor shaft sleeve designed to prevent breakage. Background Technology

[0002] As a widely used power source in modern industrial equipment, the motor shaft components often operate under high speed and high load conditions. To prevent the shaft from fatigue fracture due to vibration, impact or dynamic imbalance during long-term operation, a protective sleeve structure is usually installed on the outside of the motor shaft to improve the stability and life of the shaft.

[0003] Existing motor shaft sleeves mainly consist of a sleeve-shaped housing and a retaining ring, which are fixed to the motor shaft by mechanical fastening or gluing. Some designs include a buffer pad or an inner elastic sleeve to accommodate different motor shaft sizes. However, this type of structure generally suffers from the following drawbacks:

[0004] Poor assembly compatibility: Due to the certain tolerance of the motor shaft diameter, the traditional sheath structure is difficult to achieve a precise fit during installation, which can easily cause loose assembly or stress concentration, reducing the reliability of the cooperation between the sheath and the motor shaft.

[0005] Lack of dynamic balance adjustment mechanism: Traditional sheath structures usually only provide passive protection functions and cannot adaptively adjust according to the shaft running state. When running at high speed or under off-center load, shaft polarization or vibration is easily generated, which in turn affects the overall running accuracy and life of the motor.

[0006] Therefore, there is an urgent need for a motor shaft sleeve device with a more compact structure and adaptive locking and dynamic balance adjustment capabilities, which can not only improve the reliability of assembly fastening, but also actively participate in vibration control and axial protection during motor operation, thus meeting the current engineering requirements for high performance, long life and safe operation of motors. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a motor shaft anti-breakage sleeve, comprising an outer locking sleeve, an inner tightening sleeve, and a balance ring assembly. The inner side of the outer locking sleeve has an inner cavity, and the inner wall surface of the inner cavity is provided with a first threaded ridge and a toothed lug. The outer side of the inner tightening sleeve is provided with a second threaded thread that mates with the first threaded ridge and a ratchet for positioning. The surface of the inner tightening sleeve has several evenly distributed deformation gaps. The bottom end of the outer locking sleeve is provided with a slip ring groove, and the balance ring assembly is slidably installed in the slip ring groove. The balance ring assembly includes a slip ring and a counterweight fixed to the surface of the slip ring. This structure, through threaded tightening and tapered interference fit, ensures self-locking and fastening during assembly. Simultaneously, the balance ring assembly can freely slide to adjust the center of gravity position, effectively suppressing rotational wobble and achieving multiple protections and dynamic response for the motor shaft.

[0009] In a preferred embodiment, the outer locking sleeve, inner tightening sleeve, and balance ring assembly are further configured such that their surfaces are provided with axial opening grooves, which facilitates the sleeve structure to be fitted onto the outside of the motor shaft, improving assembly versatility and convenience; specifically, this structure helps to reduce axial interference during installation and improve the sleeve assembly efficiency.

[0010] In a preferred embodiment, the first thread and the second thread are both arranged in a helical direction, with the thread angle matching the direction of rotation, to achieve a reliable threaded engagement connection between the outer locking sleeve and the inner tightening sleeve; specifically, to ensure that it is not easy to loosen at high speeds and to enhance the stability of the sheath.

[0011] In a preferred embodiment, the inner side of the inner sleeve cavity and the outer surface of the inner tight sleeve are both tapered structures, and the diameter of the tapered body gradually decreases along the direction away from the balance ring group to achieve tapered pressing during the fitting process; specifically, this structure provides an adaptive gradually tightening fit, which facilitates improving the fitting reliability between the sheath and the motor shaft.

[0012] In a preferred embodiment, the toothed lug is further configured such that it is fixed to the inner wall of the outer locking sleeve and is used to elastically engage with the ratchet on the surface of the inner tight sleeve to form a rotation limiting mechanism; specifically, it can prevent the ratchet from reversing and loosening after tightening, and realize the self-locking function of assembly.

[0013] In a preferred embodiment, the deformation gap is further configured as follows: the deformation gap is a number of axially arranged straight groove structures, which impart a certain elastic deformation to the inner sleeve during tightening to offset the shaft diameter difference; specifically, it effectively improves the versatility and tightening adaptability of motor shafts with different tolerances.

[0014] In a preferred embodiment, the slip ring is further configured such that it is coaxially arranged with the outer locking sleeve and is slidably sleeved inside the slip ring groove, allowing it to move freely during rotation. Specifically, the sliding counterweight structure can dynamically compensate for the center of mass offset, reduce vibration caused by eccentricity, and improve rotational stability.

[0015] In summary, this utility model provides a compact, reliable, and dynamically adaptive motor shaft protection sleeve that prevents breakage, which is particularly suitable for end protection and balance adjustment of motor shafts in high-precision, high-speed rotating equipment.

[0016] The beneficial effects achieved by this utility model are as follows:

[0017] 1. In this utility model, by setting a threaded engagement structure and a conical contact structure between the outer locking sleeve and the inner tight sleeve, it is possible to achieve gradual self-tightening and enhance the tightness of the fit during assembly. Combined with the deformation gap design on the surface of the inner tight sleeve, it can effectively adapt to the dimensional tolerances of different motor shaft diameters, improve the versatility and fastening stability of the protective sleeve assembly, and at the same time, the mutual meshing of the convex lug and ratchet structure prevents rotational loosening, thereby ensuring that the protective sleeve still has good anti-dislodgement performance and structural safety at high speeds.

[0018] 2. In this utility model, the balance ring assembly set in the slip ring groove can slide freely according to the rotation state during the operation of the motor shaft, drive the counterweight block to adjust the center of gravity, play the role of adaptive dynamic balance compensation, significantly reduce the vibration and fatigue wear caused by shaft eccentricity, extend the service life of the motor and bearings, and further improve the stability and reliability of the whole machine operation. It is suitable for motor application scenarios with high requirements for dynamic balance and structural strength. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0020] Figure 2 This is an exploded structural diagram of one embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the outer locking sleeve and inner tightening sleeve according to an embodiment of the present invention;

[0022] Figure 4 This is an exploded structural diagram of the outer locking sleeve and balance ring assembly according to an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Outer locking sleeve; 101. Inner sleeve cavity; 102. Slip ring groove; 110. First threaded edge; 120. Convex tooth lug;

[0025] 200. Inner tightening sleeve; 210. Second thread; 220. Racket tooth; 230. Deformation gap;

[0026] 300. Balance ring assembly; 310. Slip ring; 320. Counterweight. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a motor shaft sleeve that prevents breakage.

[0030] Combination Figures 1-4 As shown, the present invention provides a motor shaft protective sleeve to prevent breakage, including an outer locking sleeve 100, an inner tightening sleeve 200, and a balance ring assembly 300.

[0031] The outer locking sleeve 100 is a hollow cylindrical structure with an inner cavity 101 on its inner side for accommodating the inner tightening sleeve 200. The inner cavity 101 has a conical structure, with its diameter gradually narrowing away from the motor end, facilitating the formation of a self-locking structure during the tightening process of the inner tightening sleeve 200. The inner wall of the outer locking sleeve 100 is provided with a first thread ridge 110 and several protruding lugs 120 for forming a threaded locking and ratchet limiting fit with the inner tightening sleeve 200. The bottom end of the outer locking sleeve 100 is provided with a slip ring groove 102 for slidingly mounting the balance ring assembly 300.

[0032] The inner sleeve 200 is provided with a second thread 210 and a ratchet 220 on its outer side. The second thread 210 is adapted to the first thread ridge 110 to achieve threaded engagement and fixation between the inner sleeve 200 and the outer locking sleeve 100. The ratchet 220 engages with the lug 120 to prevent rotational loosening and achieve directional locking. The inner sleeve 200 has multiple evenly arranged deformation gaps 230 on its surface. The deformation gaps 230 are axially extending straight groove structures, which are used to give the inner sleeve 200 radial elasticity during the tightening process and enhance its fit with the motor shaft surface. The overall shape of the inner sleeve 200 is also conical, forming a tapered tapered fit with the inner cavity 101 of the outer locking sleeve 100, further improving the self-locking effect during assembly.

[0033] The balance ring assembly 300 includes a slip ring 310 and a counterweight 320 fixedly mounted on the surface of the slip ring 310. The slip ring 310 is slidably engaged with the slip ring groove 102 at the bottom of the outer locking sleeve 100 and is coaxially disposed outside the motor shaft. The counterweight 320 can achieve balance adjustment by moving the slip ring 310 according to the eccentricity of the motor shaft during operation, thereby improving the operating stability of the motor shaft and reducing shaft fatigue caused by eccentric vibration.

[0034] During actual installation and use, the operator places the outer locking sleeve 100 and the inner tightening sleeve 200 onto the end of the motor shaft, allowing the inner tightening sleeve 200 to screw into the inner cavity 101 of the outer locking sleeve 100. As the tightening progresses, the first thread ridge 110 and the second thread 210 gradually engage, and the inner tightening sleeve 200, guided by the conical inner cavity, gradually presses against the surface of the motor shaft. Its external ratchet 220 engages with the convex lug 120 on the inner wall of the outer locking sleeve 100, completing the limiting and locking. Due to the deformation gap 230, the inner tightening sleeve 200 has appropriate elasticity in the radial direction, which can adapt to motor shafts with different dimensional tolerances, effectively improving the consistency and fastening reliability of the protective sleeve assembly.

[0035] The centrifugal effect during motor shaft rotation adaptively adjusts the position of slip ring 310 in slip ring groove 102, placing counterweight 320 in a favorable position to achieve dynamic balance of the overall sheath structure. During energization, the motor shaft and sheath structure rotate synchronously. The slip ring 310 in the balance ring assembly 300 automatically adjusts the position of counterweight 320 based on rotational inertia, achieving real-time dynamic balance adjustment during operation. This significantly improves the operational stability of the motor shaft and prevents shaft breakage due to uneven stress.

[0036] Working principle and usage process of this utility model:

[0037] This utility model achieves effective protection of the motor shaft, dynamic balance adjustment, and prevention of shaft breakage risk through the structural cooperation of the outer locking sleeve 100, the inner tightening sleeve 200, and the balance ring group 300.

[0038] Specifically, during installation, the outer locking sleeve 100 and the inner tightening sleeve 200 achieve a tight fit through a threaded structure (the first thread ridge 110 and the second thread 210), forming a locking fit on the motor shaft. When the inner tightening sleeve 200 is screwed into the outer locking sleeve 100, it is guided by the internal conical structure, so that the greater the screwing progress of the inner tightening sleeve 200, the tighter the engagement between the inner side of the inner tightening sleeve 200 and the surface of the electrode shaft. The ratchet 220 on the surface and the convex lug 120 on the inner wall of the outer locking sleeve form a meshing and limiting structure, thereby preventing rotational loosening and ensuring stable assembly.

[0039] Multiple deformation gaps 230 on the surface of the inner tightening sleeve 200 provide it with appropriate radial elasticity, enabling it to automatically adapt to different tolerances of the motor shaft during tightening, achieving a tighter fit and improving the overall fastening effect and anti-loosening performance of the sleeve. At the same time, the inner tightening sleeve 200 and the outer locking sleeve 100 adopt a tapered tapered fit (i.e., both the inner sleeve cavity 101 and the inner tightening sleeve 200 are tapered), making the locking process smoother and providing a self-locking effect.

[0040] In addition, a balance ring assembly 300 is slidably installed in the slip ring groove 102 at the bottom of the outer locking sleeve, wherein a counterweight 320 is fixedly installed on the slip ring 310. When the motor shaft rotates at high speed, the slip ring 310 can slide freely according to the dynamic balance state of the shaft, thereby driving the counterweight 320 to adjust its position, realizing adaptive adjustment of the overall center of mass of the sheath, effectively reducing eccentric vibration and extending the service life of the shaft.

[0041] In actual use, the operator first assembles the sheath assembly onto the motor shaft end, tightens the outer locking sleeve 100 and the inner tightening sleeve 200 to secure them in place, and then adjusts the center of gravity of the balance ring assembly 300 using the slip ring 310. After the equipment is powered on, the motor shaft rotates, driving the sheath to rotate as well. The various structures inside the sheath work together to provide physical protection while responding to and optimizing the dynamic balance of the shaft in real time.

[0042] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A motor shaft sheath designed to prevent breakage, characterized in that, include: The outer locking sleeve (100), the inner tightening sleeve (200), and the balance ring assembly (300) are provided. The inner side of the outer locking sleeve (100) is provided with an inner sleeve cavity (101). The inner wall surface of the inner sleeve cavity (101) is provided with a first thread ridge (110) and a toothed lug (120). The outer side of the inner tightening sleeve (200) is provided with a second thread (210) and a ratchet (220). The surface of the inner tightening sleeve (200) is provided with a plurality of evenly distributed deformation gaps (230). The bottom end of the outer locking sleeve (100) is provided with a slip ring groove (102). The balance ring assembly (300) is slidably installed on the inner side of the slip ring groove (102). The balance ring assembly (300) includes a slip ring (310) and a plurality of counterweights (320) fixed to the surface of the slip ring (310).

2. The anti-breakage motor shaft sleeve according to claim 1, characterized in that, The outer locking sleeve (100), inner tight sleeve (200) and balance ring assembly (300) are all provided with open slots on their surfaces for insertion and fitting of the motor shaft.

3. The anti-breakage motor shaft sleeve according to claim 1, characterized in that, The first thread ridge (110) and the second thread (210) are adapted to each other and are arranged in a spiral direction to realize the threaded engagement between the outer locking sleeve (100) and the inner tight sleeve (200).

4. The anti-breakage motor shaft sleeve according to claim 1, characterized in that, The inner side of the inner sleeve cavity (101) and the outer surface of the inner tight sleeve (200) are both tapered, and their diameters gradually decrease along the direction toward the balance ring assembly (300).

5. The anti-breakage motor shaft sleeve according to claim 1, characterized in that, The toothed lug (120) is fixed to the inner side of the outer locking sleeve (100) for elastic engagement with the ratchet (220) to realize the rotational locking function of the inner tight sleeve (200) inside the outer locking sleeve (100).

6. The anti-breakage motor shaft sleeve according to claim 1, characterized in that, The deformation gap (230) is a straight groove structure arranged along the axial direction and distributed on the surface of the second thread (210) to enhance the radial elastic deformation capability of the inner sleeve (200).

7. The anti-breakage motor shaft sleeve according to claim 1, characterized in that, The slip ring (310) is coaxially arranged with the outer locking sleeve (100) and is slidably sleeved on the inner side of the slip ring groove (102).

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