Double-cone-surface saw-tooth engagement type anti-loose shaft sleeve

Abstract

The utility model belongs to the technical field of axle sleeve anti -loose, disclose a kind of double-cone sawtooth engagement type anti-loose axle sleeve, including shaft body, two limit strips are fixedly connected in the outer surface of shaft body, the outer surface of shaft body is slidably connected with axle sleeve structure. By outer cone assembly cooperation axial support piece, the circumferential rotation of outer cone assembly can be effectively limited;By outer cone assembly cooperation inner cone assembly, the axial loosening of outer cone assembly can be effectively limited, and provide anti-loose basis for the installation of axle sleeve;By the cooperation of axle sleeve assembly and inner cone assembly, the circumferential rotation of axle sleeve assembly is limited by sawtooth engagement, the axial displacement of axle sleeve assembly is limited by thread locking, double anti-loose is easily realized, can cope with the influence of multiple complex working conditions, whether equipment is in long-term operation or intermittent working condition, stable connection relationship can be maintained, anti-loose effect is durable and reliable, significantly improve the operating stability and service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening technology for bushings, specifically to a double-cone sawtooth meshing anti-loosening bushing. Background Technology

[0002] From the perspective of the development history of the machinery industry, bushings, as the core basic component of mechanical transmission systems, are widely used in various general machinery, special equipment and precision instruments. Their core function is to provide effective support for the shaft, accurately position it and reduce wear during shaft operation, thus ensuring the smooth and efficient operation of the transmission system.

[0003] The anti-loosening performance of the bushing directly determines the operational stability, service life, and even operational safety of the equipment. During long-term operation, complex working conditions such as vibration, impact, and temperature fluctuations can easily cause clearance between the bushing and the shaft body and mounting base, leading to loosening. Once the bushing loosens, it will not only damage the transmission accuracy, resulting in increased equipment operating noise and energy consumption, but may also cause abnormal wear between components, transmission failure, and in severe cases, even equipment failure and shutdown, and even endanger the personal safety of operators.

[0004] Chinese Patent Publication No. CN213541084U discloses a bushing anti-loosening structure. This solution connects the outer shell to the main body of the electric wrench, and the connecting shaft and striking block are connected to the electric wrench's transmission components. This solves the problem of bushings easily falling off. A through groove is opened on the side wall of the bushing, and the outer diameter of the bushing is slightly larger than the diameter of its mounting hole on the outer shell, so that the bushing and the outer shell have an interference fit. Utilizing the good elasticity of the bushing after the opening, it compensates for the dimensional changes caused by the thermal expansion and contraction of the outer shell and the bushing. At the microscopic level, the final dimensional changes caused by thermal expansion and contraction are reflected in the size of the bushing opening, which meets the requirement that the bushing and the outer shell are always tightly fitted. Ultimately, it prevents problems such as loosening, outer ring slippage, and displacement caused by thermal expansion and contraction. In addition to preventing loosening, the opening can also be used in conjunction with the oil reservoir to store grease, providing more durable and effective lubrication for the output shaft, thereby improving the service life of the device.

[0005] However, the following defects still exist in the specific implementation process: the ability to suppress circumferential rotation is weak. When the equipment is running at high speed or under torque load, relative rotation may still occur between the bushing and the shaft, resulting in a decrease in transmission accuracy.

[0006] Based on this, this utility model designs a double-cone sawtooth meshing anti-loosening bushing to solve the above problems. Utility Model Content

[0007] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a double-conical serrated meshing anti-loosening bushing.

[0008] To achieve the above objectives, this utility model provides the following technical solution: A double-conical serrated meshing anti-loosening bushing includes a shaft body, two limiting strips fixedly connected to the outer surface of the shaft body, a bushing structure slidably connected to the outer surface of the shaft body, the bushing structure including a locking ring, an inner cone assembly threadedly connected to the inner surface of the locking ring, an outer cone assembly threadedly connected to the inner cone assembly, an axial support member fixedly connected to the lower end of the outer cone assembly, and a bushing assembly meshingly connected to the outer side of the inner cone assembly. Furthermore, the axial support includes a positioning tube, a support ring is fixedly connected to the outer surface of the positioning tube, and two limiting grooves are formed on the inner surface of the positioning tube. The inner walls of the two limiting grooves are slidably connected to the outer surfaces of the two limiting strips, respectively. Furthermore, the outer cone assembly includes a support ring, the upper end of which is fixedly connected to an outer cone threaded tube, and the outer surface of the outer cone threaded tube is provided with multiple tightening grooves; Furthermore, the inner cone assembly includes an inner cone tube, the inner surface of which is provided with a threaded groove, the upper end of which is fixedly connected with a threaded connecting pipe, and the outer surface of which is fixedly connected with an outer serrated pipe. Furthermore, the bushing assembly includes a connecting ring, the upper end of which is fixedly connected to the bushing body, and the inner cavity of the bushing body is fixedly connected to an inner serrated tube. Furthermore, the support ring is fixedly installed on the upper end of the positioning tube, the inner surface of the positioning tube is slidably connected to the outer surface of the shaft, and the inner surfaces of both the support ring and the outer tapered threaded tube are slidably connected to the outer surface of the shaft. Furthermore, the inner serrated tube is meshed with the outer serrated tube, and the upper inner surface of the bushing body is slidably connected to the outer surface of the shaft body. Furthermore, the inner surface of the threaded groove is threadedly connected to the outer surface of the external tapered threaded pipe, and the outer surface of the threaded connecting pipe is threadedly connected to the inner surface of the locking ring.

[0009] In fact, the advantages of using new technologies compared to existing technologies are as follows:

[0010] (1) This solution can effectively limit the circumferential rotation of the outer cone assembly by using the outer cone assembly in conjunction with the axial support; and can effectively limit the axial loosening of the outer cone assembly by using the outer cone assembly in conjunction with the inner cone assembly, and provide an anti-loosening foundation for the installation of the bushing.

[0011] (2) This solution uses the bushing assembly and the inner cone assembly to cooperate, and uses the sawtooth meshing method to restrict the circumferential rotation of the bushing assembly and the thread locking method to restrict the axial displacement of the bushing assembly. It easily achieves double anti-loosening and can cope with the influence of various complex working conditions. Whether the equipment is in long-term operation or intermittent operation, it can maintain a stable connection relationship. The anti-loosening effect is durable and reliable, which significantly improves the operating stability and service life of the equipment.

[0012] (3) This solution uses the coordinated cooperation of multiple components to make the assembly process free of complicated special tools. It can be completed by simple operations such as rotation and fitting, which improves the ease of installation. When disassembling, simply rotate the locking ring in the opposite direction to release the bushing assembly, which is easy to remove. Then the inner cone assembly, outer cone assembly and other parts can be separated in sequence. The whole disassembly process is simple and quick, which is convenient for inspection and maintenance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bushing structure of this utility model; Figure 3 This is a schematic diagram of the axial support component of this utility model; Figure 4 This is a schematic diagram of the outer cone assembly of this utility model; Figure 5 This is a schematic diagram of the inner cone assembly of this utility model; Figure 6 This is a schematic diagram of the bushing assembly of this utility model.

[0015] The labels in the diagram represent: 1. Shaft body; 2. Limiting strip; 3. Bushing structure; 31. Locking ring; 32. Inner tapered assembly; 321. Inner tapered tube; 322. Threaded groove; 323. Threaded connecting tube; 324. Outer serrated tube; 33. Outer tapered assembly; 331. Support ring; 332. Outer tapered threaded tube; 333. Tightening groove; 34. Axial support; 341. Positioning tube; 342. Support ring; 343. Limiting groove; 35. Bushing assembly; 351. Connecting ring; 352. Bushing body; 353. Inner serrated tube. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] The present invention will be further described below with reference to the embodiments.

[0018] In some embodiments, please refer to the appendix to the instruction manual. Figure 1 - Figure 6 A double-cone sawtooth meshing anti-loosening bushing includes a shaft body 1. Two limiting strips 2 are fixedly connected to the outer surface of the shaft body 1. A bushing structure 3 is slidably connected to the outer surface of the shaft body 1. The bushing structure 3 includes a locking ring 31. An inner cone assembly 32 is threadedly connected to the inner surface of the locking ring 31. An outer cone assembly 33 is threadedly connected to the inner cone assembly 32. An axial support member 34 is fixedly connected to the lower end of the outer cone assembly 33. A bushing assembly 35 is meshingly connected to the outer side of the inner cone assembly 32.

[0019] The limiting strip 2 extends along the axial direction of the shaft 1 and is mainly used to cooperate with the groove formed by the limiting groove 343 and the support ring 331 to restrict the relative circumferential rotation between the axial support 34 and the shaft 1, laying the foundation for the circumferential fixation of the subsequent anti-loosening structure.

[0020] The locking ring 31 is made of high-strength carbon steel and has good thread bearing capacity and deformation resistance. The inner surface is machined with precision threads. Its function is to provide downward pressure to the bushing assembly 35 by cooperating with the threaded connecting tube 323 of the inner cone assembly 32, so that the bushing assembly 35 can be limited between the locking ring 31 and the axial support member 34.

[0021] The axial support 34 includes a positioning tube 341, the inner surface of the positioning tube 341 is slidably connected to the outer surface of the shaft 1, a support ring 342 is fixedly connected to the outer surface of the positioning tube 341, and two limiting grooves 343 are opened on the inner surface of the positioning tube 341. The inner walls of the two limiting grooves 343 are slidably connected to the outer surfaces of the two limiting strips 2 respectively.

[0022] The outer tapered assembly 33 includes a support ring 331, which is fixedly installed on the upper end of the positioning tube 341. An outer tapered threaded tube 332 is fixedly connected to the upper end of the support ring 331. The inner surface of the threaded groove 322 is threadedly connected to the outer surface of the outer tapered threaded tube 332. The inner surfaces of the support ring 331 and the outer tapered threaded tube 332 are slidably connected to the outer surface of the shaft 1. Multiple tightening grooves 333 are provided on the outer surface of the outer tapered threaded tube 332.

[0023] The inner conical assembly 32 includes an inner conical tube 321, with a threaded groove 322 on the inner surface of the inner conical tube 321. A threaded connecting tube 323 is fixedly connected to the upper end of the inner conical tube 321. The outer surface of the threaded connecting tube 323 is threadedly connected to the inner surface of the locking ring 31. An outer serrated tube 324 is fixedly connected to the outer surface of the inner conical tube 321. The inner serrated tube 353 and the outer serrated tube 324 are engaged and connected.

[0024] The bushing assembly 35 includes a connecting ring 351, with a bushing body 352 fixedly connected to the upper end of the connecting ring 351. The upper inner surface of the bushing body 352 is slidably connected to the outer surface of the shaft 1, and an inner serrated tube 353 is fixedly connected to the inner cavity of the bushing body 352.

[0025] In this embodiment of the utility model, by inserting the positioning tube 341 of the axial support 34 along the axial direction of the shaft 1, the two limiting strips 2 on the outer surface of the shaft 1 are accurately embedded in the two limiting grooves 343 on the inner surface of the positioning tube 341. Through the cooperation of the limiting strips 2 and the limiting grooves 343, the circumferential limiting of the axial support 34 and the shaft 1 is achieved, preventing relative rotation between the two in subsequent work. Since the support ring 331 is fixed at the upper end of the positioning tube 341, the external tapered thread tube 332 will also keep in contact with the outer surface of the shaft 1 at this time.

[0026] By fitting the inner tapered tube 321 over the outer tapered threaded tube 332, the threaded groove 322 on the inner surface of the inner tapered tube 321 is aligned with the thread on the outer surface of the outer tapered threaded tube 332. By rotating the inner tapered assembly 32, a tight threaded connection is formed between the two. At this time, the inner tapered surface of the inner tapered tube 321 and the outer tapered surface of the outer tapered threaded tube 332 remain in contact. During the rotation, the multiple tightening grooves 333 on the outer tapered threaded tube 332 will shrink inward under the squeezing action of the inner tapered tube 321, gradually pressing against the outer surface of the shaft 1. Axial anti-loosening is achieved through the friction between the outer tapered threaded tube 332 and the shaft 1, forming the core guarantee for axial anti-loosening.

[0027] By fitting the bushing body 352 along the axial direction of the shaft 1, the inner surface of the upper side of the bushing body 352 slides with the outer surface of the shaft 1. At the same time, the position of the bushing assembly 35 is adjusted so that the inner serrated tube 353 of the inner cavity of the bushing body 352 is fully engaged with the outer serrated tube 324 of the inner cone assembly 32. Through the interlocking of the serrated structures, the circumferential rotation between the inner cone assembly 32 and the bushing assembly 35 is restricted. At this time, the position of the connecting ring 351 will be above the support ring 342.

[0028] By fitting the locking ring 31 onto the outside of the threaded connecting pipe 323 and rotating the locking ring 31 to engage with the threaded connecting pipe 323, the locking ring 31 continuously tightens, generating a downward axial thrust on the bushing body 352. The bushing body 352 and the connecting ring 351 move downward along the outer serrated pipe 324 until the connecting ring 351 abuts against the support ring 342. At this point, the entire bushing assembly 35 is firmly positioned between the locking ring 31 and the support ring 342. Through the synergistic action of the limiting strip 2 and the limiting groove 343, the inner serrated pipe 353 and the outer serrated pipe 324, the outer tapered threaded pipe 332 and the shaft body 1, and the locking ring 31 and the support ring 342, the bushing body 352 is effectively prevented from loosening in both the axial and circumferential directions, ensuring a firm connection between the components and no relative displacement.

[0029] Working principle: During installation, first, the positioning tube 341 of the axial support 34 is inserted along the axial direction of the shaft 1 to ensure that the two limiting strips 2 on the outer surface of the shaft 1 are accurately embedded in the two limiting grooves 343 on the inner surface of the positioning tube 341. Through the cooperation of the limiting strips 2 and the limiting grooves 343, the circumferential limiting of the axial support 34 and the shaft 1 is achieved, preventing relative rotation between the two in subsequent work. Since the support ring 331 is fixed at the upper end of the positioning tube 341, the external tapered thread tube 332 will also keep in contact with the outer surface of the shaft 1 at this time.

[0030] Then, the inner tapered assembly 32 is installed, and the inner tapered tube 321 is fitted onto the outside of the outer tapered threaded tube 332, so that the threaded groove 322 on the inner surface of the inner tapered tube 321 is aligned with the thread on the outer surface of the outer tapered threaded tube 332. By rotating the inner tapered assembly 32, the two form a tight threaded connection. At this time, the inner tapered surface of the inner tapered tube 321 and the outer tapered surface of the outer tapered threaded tube 332 are in contact. During the rotation, the multiple tightening grooves 333 on the outer tapered threaded tube 332 will shrink inward under the squeezing action of the inner tapered tube 321, gradually pressing against the outer surface of the shaft 1. Axial anti-loosening is achieved through the friction between the outer tapered threaded tube 332 and the shaft 1, forming the core guarantee for axial anti-loosening.

[0031] Next, install the bushing assembly 35. Sleeve the bushing body 352 along the axial direction of the shaft 1, so that the inner surface of the upper side of the bushing body 352 slides with the outer surface of the shaft 1. At the same time, adjust the position of the bushing assembly 35 so that the inner serrated tube 353 of the inner cavity of the bushing body 352 is fully engaged with the outer serrated tube 324 of the inner cone assembly 32. Through the interlocking of the serrated structures, the circumferential rotation between the inner cone assembly 32 and the bushing assembly 35 is restricted. At this time, the position of the connecting ring 351 will be above the support ring 342.

[0032] Finally, the locking ring 31 is placed on the outside of the threaded connecting pipe 323. The locking ring 31 is rotated to engage with the threaded connecting pipe 323. As the locking ring 31 is tightened, it will generate a downward axial thrust on the bushing body 352. The bushing body 352 and the connecting ring 351 move down along the outer serrated pipe 324 until the connecting ring 351 presses against the support ring 342. At this time, the entire bushing assembly 35 will be firmly limited between the locking ring 31 and the support ring 342. Through the synergistic action of the limiting strip 2 and the limiting groove 343, the inner serrated pipe 353 and the outer serrated pipe 324, the outer tapered threaded pipe 332 and the shaft body 1, and the locking ring 31 and the support ring 342, the bushing body 352 is double-locked in both axial and circumferential directions, ensuring that the connection between the components is firm and there is no relative displacement.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-conical serrated meshing anti-loosening bushing, comprising a shaft body (1), characterized in that: Two limiting strips (2) are fixedly connected to the outer surface of the shaft (1). A bushing structure (3) is slidably connected to the outer surface of the shaft (1). The bushing structure (3) includes a locking ring (31). An inner cone assembly (32) is threadedly connected to the inner surface of the locking ring (31). An outer cone assembly (33) is threadedly connected to the inner cone assembly (32). An axial support member (34) is fixedly connected to the lower end of the outer cone assembly (33). A bushing assembly (35) is meshed with the outer side of the inner cone assembly (32).

2. The double-conical serrated meshing anti-loosening bushing according to claim 1, characterized in that: The axial support (34) includes a positioning tube (341), a support ring (342) is fixedly connected to the outer surface of the positioning tube (341), and two limiting grooves (343) are opened on the inner surface of the positioning tube (341). The inner walls of the two limiting grooves (343) are slidably connected to the outer surfaces of the two limiting strips (2).

3. The double-conical serrated meshing anti-loosening bushing according to claim 2, characterized in that: The outer cone assembly (33) includes a support ring (331), and an outer cone threaded tube (332) is fixedly connected to the upper end of the support ring (331). The outer surface of the outer cone threaded tube (332) is provided with multiple tightening grooves (333).

4. The double-cone serrated meshing anti-loosening bushing according to claim 3, characterized in that: The inner cone assembly (32) includes an inner cone tube (321), the inner surface of which is provided with a threaded groove (322), the upper end of which is fixedly connected with a threaded connecting tube (323), and the outer surface of which is fixedly connected with an outer serrated tube (324).

5. The double-cone serrated meshing anti-loosening bushing according to claim 4, characterized in that: The bushing assembly (35) includes a connecting ring (351), the upper end of which is fixedly connected to a bushing body (352), and the inner cavity of the bushing body (352) is fixedly connected to an inner serrated tube (353).

6. The double-conical serrated meshing anti-loosening bushing according to claim 3, characterized in that: The support ring (331) is fixedly installed on the upper end of the positioning tube (341). The inner surface of the positioning tube (341) is slidably connected to the outer surface of the shaft (1). The inner surfaces of the support ring (331) and the outer tapered threaded tube (332) are both slidably connected to the outer surface of the shaft (1).

7. The double-conical serrated meshing anti-loosening bushing according to claim 5, characterized in that: The inner serrated tube (353) is meshed with the outer serrated tube (324), and the upper inner surface of the bushing body (352) is slidably connected with the outer surface of the shaft body (1).

8. The double-conical serrated meshing anti-loosening bushing according to claim 4, characterized in that: The inner surface of the threaded groove (322) is threadedly connected to the outer surface of the external tapered threaded tube (332), and the outer surface of the threaded connecting tube (323) is threadedly connected to the inner surface of the locking ring (31).

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