Thread locking type industrial furnace roller

Abstract

The utility model discloses a thread locking type industrial furnace roller, which comprises a central shaft, a first shaft bumper, a circular ring piece and a second shaft bumper, the first shaft bumper is fixed at the left end of the central shaft, the right end part of the central shaft is provided with an external thread, the right end part of the central shaft is provided with a locking nut, the locking nut is screwed on the external thread, and the second shaft bumper is fixed on the circular ring piece. The locking nut is in pressing contact with the second shaft bumper; in conclusion, a nut locking structure is adopted to replace a traditional clamping mode, so that the assembly efficiency and the maintenance convenience are remarkably improved; the problem that the nut is loosened in a high-temperature vibration environment is effectively solved through the cooperation of the cotter pin and the cotter nut, the design of the belleville spring set and various anti-loosening schemes. Meanwhile, the high-temperature-resistant and self-repairing characteristics of the fiber roller surface are reserved, and the influence of surface sintering oxidation on the product quality is avoided; the structure is easy and convenient to install, the overall reliability of the furnace roller is greatly improved, and the service life of the furnace roller is greatly prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of industrial furnace technology, and specifically relates to a threaded locking industrial furnace roller. Background Technology

[0002] Currently, industrial furnace rollers are mainly used for the heat treatment of sheet metal. They are typically driven by a motor to move the roller shaft, which in turn drives the cone, thus rotating the roller. In existing technology, the roller shaft and cone are usually connected by argon arc welding. Under long-term, continuous, and heavy-load operating conditions, this structure is prone to developing micro-cracks in the weld due to alternating stress, eventually leading to cracking and frequent furnace shutdowns for roller replacement. Furthermore, the surface material of existing furnace rollers is prone to sintering, spalling, and oxidation, lacking self-repair capabilities. Damage to these rollers can further scratch the product, affecting product quality.

[0003] Patent No. ZL 201620038636.X discloses an industrial furnace roller, which adopts a structure of a central shaft, a shaft stop, and a fiber ring plate. The second shaft stop is fixed to the central shaft via a snap-fit ​​structure. The fiber roller surface has good high-temperature resistance and self-healing properties, effectively improving product quality and service life. However, this structure has certain inconveniences in installation and maintenance. The fan ring plate needs to be precisely embedded between the slot and the positioning slot, requiring high operating space and installation accuracy. Improper tolerance control may affect the assembly effect, and disassembly and assembly during maintenance may require special tools, increasing the complexity of practical application. Utility Model Content

[0004] The present invention aims to provide a threaded locking industrial furnace roller to solve the technical problem of inconvenient installation and maintenance of existing industrial furnace rollers.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A threaded locking industrial furnace roller includes a central shaft, a first shaft stop, annular plates, and a second shaft stop. The first shaft stop is fixed to the left end of the central shaft, and all the annular plates are fitted in the middle of the central shaft. The second shaft stop is fitted to the right end of the central shaft. An external thread is provided at the right end of the central shaft, and a locking nut is installed at the right end of the central shaft. The locking nut is screwed onto the external thread and presses against the right side of the second shaft stop.

[0007] Furthermore, the locking nut is a slotted nut with a pin hole at the right end of the central shaft. The pin hole is a through hole and is perpendicular to the axis of the central shaft. A cotter pin passes through the pin hole and is fixedly connected to the slotted nut.

[0008] Furthermore, a high-temperature resistant wedge-shaped anti-loosening washer is provided on the left side of the locking nut.

[0009] Furthermore, in any of the above-mentioned threaded locking industrial furnace rollers, a disc spring assembly is also fitted at the right end of the central shaft, and the disc spring assembly is located between the locking nut and the second shaft stop.

[0010] Furthermore, the diameter of the second axle stop is 2-50 mm larger than the diameter of the annular piece, and the portion of the second axle stop above the annular piece forms a boss ring.

[0011] Furthermore, a top-pressure rough surface is provided on the right end face of the second axle stop, and the locking nut abuts against the top-pressure rough surface.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The threaded locking industrial furnace roller of this utility model adopts a nut locking structure to replace the traditional snap-fit ​​method, which significantly improves assembly efficiency and maintenance convenience.

[0014] (2) In addition, this utility model adopts a slotted nut and cotter pin, wedge-shaped anti-loosening washer and / or top-pressing rough surface anti-loosening scheme, which effectively solves the problem of nut loosening under high temperature vibration environment.

[0015] (3) The added disc spring assembly can automatically compensate for thermal deformation and ensure stable locking under long-term heavy load conditions. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a threaded locking industrial furnace roller according to the present invention.

[0018] Figure 2 This is a schematic diagram of the first anti-loosening structure in Embodiment 2 of this utility model.

[0019] Figure 3 This is a schematic diagram of the second anti-loosening structure in Embodiment 2 of this utility model.

[0020] Figure 4 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0021] Figure 5 This is a structural schematic diagram of Embodiment 4 of the present utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The present invention will be further described in detail below with reference to the embodiments.

[0024] like Figure 1 As shown, here is a specific embodiment 1 of the threaded locking industrial furnace roller provided by this utility model:

[0025] A threaded locking industrial furnace roller includes a central shaft 1, a first shaft stop 2, annular plates 3, and a second shaft stop 4. The first shaft stop 2 is fixed to the left end of the central shaft 1. All the annular plates 3 are fitted in the middle part of the central shaft 1. The second shaft stop 4 is fitted to the right end of the central shaft 1. An external thread 5 is provided at the right end of the central shaft 1. A locking nut 6 is installed at the right end of the central shaft 1. The locking nut 6 is screwed onto the external thread 5 and presses against the right side of the second shaft stop 4 to reliably lock and fix the second shaft stop 4 onto the central shaft 1.

[0026] The threaded locking industrial furnace roller of this embodiment first retains the high-temperature resistance and self-healing properties of the fiber roller surface in the original patent, and can still avoid the impact of surface sintering, oxidation and other problems on product quality. Secondly, the locking nut 6 and the external thread 5 form a nut locking structure, which can provide uniform axial preload, avoid fretting wear or loosening caused by alternating stress in the clamping structure, and is more suitable for long-term heavy load conditions. In addition, the nut locking can be periodically retightened to prevent displacement of the second shaft stop 4 due to vibration and extend the overall life of the furnace roller. Compared with the prior art, the nut locking structure has lower tolerance sensitivity, does not require precise matching of the slot and positioning slot, simplifies the assembly process of the fan ring, and is especially suitable for narrow or restricted operating spaces. It also reduces the reliance on special tools, and can be disassembled and assembled with a regular wrench, which is convenient for maintenance and quick replacement.

[0027] Specific embodiment 2 of the threaded locking type industrial furnace roller provided by this utility model:

[0028] The difference from specific implementation 1 is that, in order to further enhance the reliability of nut locking and prevent the second axle stop 4 from loosening due to loosening in a high-temperature and vibration environment, either of the following two anti-loosening structures can be set:

[0029] like Figure 2As shown, the locking nut is a slotted nut 7, with a pin hole at the right end of the central shaft 1. The pin hole is a through hole and is perpendicular to the axis of the central shaft 1. A cotter pin 8 is inserted into the pin hole and engages with the slotted nut 7. When the two ends of the cotter pin 8 are bent down, they fit into the slot of the slotted nut 7 to form a mechanical interlock, achieving an absolute anti-loosening effect.

[0030] like Figure 3 As shown, a high-temperature resistant wedge-shaped anti-loosening washer 9 is provided on the left side of the locking nut 6. The high-temperature resistant wedge-shaped anti-loosening washer 9 can provide highly reliable anti-loosening and can be repeatedly disassembled and reassembled, with a long service life.

[0031] like Figure 4 As shown, here is a specific embodiment 3 of the threaded locking industrial furnace roller provided by this utility model:

[0032] The difference from the above embodiment is that a disc spring assembly 10 is also fitted on the right end of the central shaft 1. The disc spring assembly 10 is made of Inconel 718 alloy and is located between the locking nut 6 and the second shaft stop 4. In this embodiment, the disc spring assembly 10 continuously compensates for the decrease in preload caused by thermal deformation or vibration through the continuous elastic force of the disc spring assembly 10.

[0033] like Figure 5 As shown, here is a specific embodiment 4 of the threaded locking industrial furnace roller provided by this utility model:

[0034] In this embodiment, the diameter of the second axle stop 4 is 10mm larger than the diameter of the annular piece 3, and the part of the second axle stop 4 that is higher than the annular piece 3 forms a boss ring 12; a top pressing rough surface 11 is provided on the right end face of the second axle stop 4, and the locking nut 6 abuts against the top pressing rough surface 11. The design of the top pressing rough surface 11 significantly improves the contact friction coefficient of the locking nut 6.

[0035] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A threaded locking type industrial furnace roller, comprising a central shaft, a first axle stop, annular plates, and a second axle stop, wherein the first axle stop is fixed to the left end of the central shaft, all the annular plates are fitted into the middle part of the central shaft, and the second axle stop is fitted into the right end of the central shaft, characterized in that: An external thread is provided at the right end of the central shaft, and a lock nut is installed at the right end of the central shaft. The lock nut is screwed onto the external thread and presses against the right side of the second shaft stop.

2. The threaded locking type industrial furnace roller according to claim 1, characterized in that: The locking nut is a slotted nut with a pin hole at the right end of the central shaft. The pin hole is a through hole and is perpendicular to the axis of the central shaft. A cotter pin passes through the pin hole and is fixedly connected to the slotted nut.

3. The threaded locking type industrial furnace roller according to claim 1, characterized in that: A high-temperature resistant wedge-shaped anti-loosening washer is provided on the left side of the lock nut.

4. The threaded locking industrial furnace roller according to any one of claims 1-3, characterized in that: A disc spring assembly is also fitted at the right end of the central shaft, and the disc spring assembly is located between the locking nut and the second shaft stop.

5. A threaded locking industrial furnace roller according to claim 4, characterized in that: The diameter of the second axle stop is 2-50 mm larger than the diameter of the circular ring, and the portion of the second axle stop that is higher than the circular ring forms a boss ring.

6. A threaded locking industrial furnace roller according to claim 5, characterized in that: A top-pressure rough surface is provided on the right end face of the second axle stop, and the locking nut abuts against the top-pressure rough surface.

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