Control device rotating shaft structure

Abstract

The utility model belongs to pivot technical field discloses a control device pivot structure, including first axle body, second axle body and axle sleeve, first end surface of first axle body is equipped with connecting part, the first end surface of second axle body is equipped with the threaded hole, connecting part is screwed in the threaded hole, the outer surface of axle sleeve is equipped with the wear -resisting coating, the wear -resisting coating is ceramic coating or tungsten carbide coating. In the utility model, the inner wall of axle sleeve both ends and the second end of first axle body and second axle body are connected through the locating key and form rigid connection, cooperate the axial constraint of the threaded connection between first axle body and second axle body, form the anti -loose structure, effectively avoid the small rotation caused by vibration or alternating load, ensure the stability of transmission system operation.

Description

Technical Field

[0001] This utility model belongs to the field of rotating shaft technology, specifically relating to a rotating shaft structure for a control device. Background Technology

[0002] In the field of precision mechanical transmission, shafts, as transmission components, directly affect the stability and service life of equipment. For example, in office equipment such as photocopiers, shafts must simultaneously undertake the functions of support, transmission, and adjustment.

[0003] In existing technologies, shaft structures typically employ an integral design or a simple segmented connection method, using key connections or interference fits to fix the shafts together. While traditional shafts offer detachability, their connection points lack effective anti-loosening designs. Under vibration or alternating loads, the shaft connection is prone to slight rotation. As the service life extends, this slight movement gradually evolves into connection failure, leading to anything from minor deviations in transmission system accuracy to severe shaft breakage. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a control device shaft structure. The inner walls of both ends of the bushing are rigidly connected to the second ends of the first shaft and the second shaft through positioning keys. Combined with the axial constraint of the threaded connection between the first shaft and the second shaft, an anti-loosening structure is formed, which effectively avoids the small rotation caused by vibration or alternating load and ensures the stability of the transmission system operation.

[0005] The technical solution of this utility model is as follows: a control device rotating shaft structure, including a first shaft body, a second shaft body and a bushing, wherein a connecting part is provided on the first end face of the first shaft body; a threaded hole is provided on the first end face of the second shaft body, and the connecting part is threadedly connected to the threaded hole;

[0006] The bushing is fitted onto the outer surfaces of the first shaft and the second shaft, and the inner walls at both ends of the bushing are connected to the second ends of the first shaft and the second shaft by positioning keys.

[0007] Preferably, the outer surface of the bushing is provided with a wear-resistant coating.

[0008] Preferably, the wear-resistant coating is a ceramic coating or a tungsten carbide coating, and the thickness of the wear-resistant coating is 0.05 mm to 0.1 mm.

[0009] Preferably, the outer surfaces of the first shaft and the second end of the second shaft are provided with a plurality of circumferentially spaced grooves.

[0010] Preferably, the strip groove is provided with a first positioning groove for fixing the positioning key;

[0011] The inner walls at both ends of the bushing are provided with second positioning grooves at equal intervals for fixing the positioning key, and the positioning key is inserted into the first positioning groove and the second positioning groove.

[0012] Preferably, the outer surface of the connecting part is provided with an external thread, and the threaded hole is provided with an internal thread, wherein the external thread and the internal thread are adapted to each other.

[0013] Preferably, the first shaft and the second shaft are connected by threads to form a coaxial structure, and their outer diameters are equal.

[0014] Preferably, the second ends of both the first shaft and the second shaft are fixedly connected to a first connecting segment, and the outer diameter of the first connecting segment is smaller than the outer diameter of the first shaft.

[0015] Preferably, a second connecting segment is fixedly connected to the end of the first connecting segment away from the first shaft or the second shaft.

[0016] Preferably, the second connecting segment is provided with a keyway and a slot.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0018] 1. In this application, the inner walls of both ends of the bushing are rigidly connected to the second ends of the first shaft and the second shaft through positioning keys. Combined with the axial constraint of the threaded connection between the first shaft and the second shaft, an anti-loosening structure is formed, which effectively avoids the small rotation caused by vibration or alternating load and ensures the stability of the transmission system operation.

[0019] 2. In this application, a wear-resistant coating is provided on the outer surface of the bushing, which improves the surface hardness and wear resistance of the bushing and can maintain an extremely low wear rate even under high-speed operating conditions, thus avoiding shaft failure caused by bushing wear. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the first shaft structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the second shaft structure of this utility model;

[0025] Figure 5 This is a three-dimensional view of the structure of this utility model in use;

[0026] Figure 6 This is a front view of the structure when the present invention is in use.

[0027] In the attached diagram: 10, rotating shaft; 11, first shaft body; 111, connecting part; 12, second shaft body; 121, threaded hole; 13, bushing; 14, first connecting section; 15, second connecting section; 151, keyway; 152, slot; 16, positioning key. Detailed Implementation

[0028] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] Please see Figure 1-6 A control device shaft structure includes a first shaft 11, a second shaft 12, and a bushing 13. The first end face of the first shaft 11 is provided with a connecting part 111; the first end face of the second shaft 12 is provided with a threaded hole 121, and the connecting part 111 is threadedly connected to the threaded hole 121.

[0031] The bushing 13 is fitted onto the outer surface of the first shaft 11 and the second shaft 12. The inner diameter of the bushing 13 is slightly larger than the outer diameter of the first shaft 11 and the second shaft 12, forming a clearance fit.

[0032] The inner walls at both ends of the bushing 13 are connected to the second ends of the first shaft 11 and the second shaft 12 via locating keys 16. The inner walls at both ends of the bushing 13 are rigidly connected to the second ends of the first shaft 11 and the second shaft 12 via locating keys 16. Combined with the axial constraint of the threaded connection between the first shaft 11 and the second shaft 12, an anti-loosening structure is formed, which effectively avoids small rotations caused by vibration or alternating loads and ensures the stability of the transmission system.

[0033] In some embodiments, the outer surface of the bushing 13 is provided with a wear-resistant coating. The wear-resistant coating on the outer surface of the bushing 13 improves the surface hardness and wear resistance of the bushing 13, and can maintain an extremely low wear rate even under high-speed operating conditions, thus avoiding the failure of the rotating shaft 10 due to wear of the bushing 13.

[0034] In some embodiments, the wear-resistant coating is a ceramic coating or a tungsten carbide coating, and the thickness of the wear-resistant coating is 0.05 mm to 0.1 mm. The ceramic powder or tungsten carbide is heated to a molten or semi-molten state by a high-temperature and high-speed airflow and sprayed onto the surface of the bushing 13 at supersonic speed. When the sprayed particles impact the bushing 13, they undergo plastic deformation to form a dense wear-resistant coating with a layered stacked structure.

[0035] In some embodiments, the outer surfaces of the second ends of the first shaft 11 and the second shaft 12 are provided with a plurality of circumferentially spaced grooves. The groove structure provides a force application point for the tool, enabling the operator to apply controllable torque to the first shaft 11 and the second shaft 12 with tools such as wrenches, thereby improving the assembly efficiency of the first shaft 11 and the second shaft 12.

[0036] In some embodiments, the strip groove is provided with a first positioning groove for fixing the positioning key 16; the inner walls of both ends of the bushing 13 are provided with second positioning grooves at equal intervals for fixing the positioning key 16. The positioning key 16 is inserted into the first positioning groove and the second positioning groove. This embedded connection method can effectively avoid transmission interruption accidents caused by the failure of the positioning key 16 connection.

[0037] In some embodiments, the outer surface of the connecting portion 111 is provided with an external thread, and the threaded hole 121 is provided with an internal thread. The external thread and the internal thread are adapted to each other, facilitating a detachable connection between the first shaft 11 and the second shaft 12. During the manufacturing process, the two shafts can share the same external cylindrical grinding process, reducing tool changes, shortening single-piece processing time, and improving batch production efficiency. During installation and maintenance, the threaded connection supports quick on-site disassembly and assembly, eliminating the need to disassemble the entire transmission system during maintenance, thus shortening operation time.

[0038] In some embodiments, the first shaft 11 and the second shaft 12 are connected by threads to form a coaxial structure, and their outer diameters are equal, so that the two shafts form a rotating body with equal diameter after connection. This can reduce radial runout during rotation, avoid vibration and noise caused by mass eccentricity, and ensure smooth operation of the transmission system.

[0039] In some embodiments, the second ends of the first shaft 11 and the second shaft 12 are both fixedly connected to a first connecting segment 14, and the outer diameter of the first connecting segment 14 is smaller than the outer diameter of the first shaft 11.

[0040] In some embodiments, a second connecting section 15 is fixedly connected to one end of the first connecting section 14 away from the first shaft 11 or the second shaft 12. The second connecting section 15 is provided with a keyway 151 and a retaining groove 152. The keyway 151, through its engagement with a key, enables the circumferential fixation of the rotating shaft 10 to the parts on the shaft, thereby transmitting torque and motion. The retaining groove 152 provides an axial limiting function, facilitating the fixation of the rotating shaft 10 to the device.

[0041] It should be noted that the terms “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.

[0042] 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 control device rotating shaft structure, characterized in that, The utility model relates to a shaft sleeve structure, including: The first end surface of first shaft body (11) is equipped with connecting portion (111); The first end surface of second shaft body (12) is equipped with threaded hole (121), and connecting portion (111) is screwed in threaded hole (121); Shaft sleeve (13) is set up in the outer surface of first shaft body (11) and second shaft body (12), and the inner wall of both ends of shaft sleeve (13) is connected between the second end of first shaft body (11) and second shaft body (12) through locating key (16).

2. The control device rotary shaft structure according to claim 1, wherein The outer surface of the shaft sleeve (13) is provided with a wear-resistant coating.

3. The control device rotating shaft structure according to claim 2, wherein The wear-resistant coating is a ceramic coating or a tungsten carbide coating, and the wear-resistant coating has a thickness of 0.05mm-0.1mm.

4. The control device rotating shaft structure according to claim 1, wherein The outer surface of the second end of the first shaft body (11) and the second shaft body (12) is circumferentially equidistantly provided with a plurality of strip-shaped grooves.

5. The control device rotating shaft structure according to claim 4, wherein The first positioning groove is provided in the strip-shaped groove for fixing the locating key (16). The inner wall of both ends of the shaft sleeve (13) is circumferentially equidistantly provided with a second positioning groove for fixing the locating key (16), and the locating key (16) is inserted into the first positioning groove and the second positioning groove.

6. The control device rotating shaft structure according to claim 1, wherein The outer surface of the connecting portion (111) is provided with an external thread portion, and the threaded hole (121) is provided with an internal thread portion, and the external thread portion is matched with the internal thread portion.

7. The control device rotating shaft structure according to claim 1, wherein The first shaft body (11) and the second shaft body (12) are coaxially connected by screwing, and the outer diameters of the two are equal.

8. The control device rotating shaft structure according to claim 1, wherein The second end of the first shaft body (11) and the second shaft body (12) is fixedly connected with the first connecting section (14), and the outer diameter of the first connecting section (14) is smaller than the outer diameter of the first shaft body (11).

9. The control device rotating shaft structure according to claim 8, wherein The first connecting section (14) is fixedly connected with the second connecting section (15) away from the first shaft body (11) or the second shaft body (12).

10. The control device rotating shaft structure according to claim 9, wherein The second connecting section (15) is provided with a key groove (151) and a clamping groove (152).

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