An expansion sleeve type brake disc coupling

Abstract

This application relates to the field of mechanical transmission and braking technology, specifically disclosing an expansion-type brake disc coupling, including a main shaft body. The end of the main shaft body has a mounting section, and the outer surface of the mounting section has a brake disc body. Multiple positioning holes are formed on the outer surfaces of both the brake disc body and the main shaft body. Each positioning hole contains a positioning pin. An outer ring is connected to the inside of the brake disc body, and an inner ring is connected to the outer surface of the mounting section. The connection is achieved through the cooperation of the inner and outer rings with expansion bolts, avoiding the stress concentration problem of keyways in traditional keyed connections, reducing the risk of fatigue damage to the shaft and hub. The expansion bolts enable a detachable connection, significantly reducing maintenance difficulty and costs, facilitating component replacement and repair. The cooperation of the positioning pins with the positioning holes enhances the positioning accuracy of the brake disc body and the main shaft body, ensuring stability during transmission.

Description

Technical Field

[0001] This application relates to the field of mechanical transmission and braking technology, and in particular to an expansion sleeve type brake disc coupling. Background Technology

[0002] In the field of mechanical transmission and braking technology, couplings are key components that connect two shafts in different mechanisms to rotate together and transmit motion and torque. Their performance directly affects the stability, safety and transmission efficiency of the entire mechanical system. Brake discs are the core components of the braking system, which achieve mechanical deceleration or stopping through friction with brake pads.

[0003] Traditional brake disc couplings use keyed or welded connections for some parts of the connection. Keyed connections are prone to stress concentration in the keyway during long-term high-load transmission, leading to fatigue damage to the shaft or hub and affecting service life. Meanwhile, welded connections may have welding defects such as cracks and porosity due to improper welding processes, and the welded structure is difficult to disassemble and repair, increasing maintenance costs and difficulty. To address these issues, we propose an expansion sleeve type brake disc coupling. Utility Model Content

[0004] This application provides an expansion sleeve type brake disc coupling, which can solve the problems of stress concentration in key connections and difficulty in disassembly and maintenance of welded connections in traditional brake disc and coupling connection structures.

[0005] This application provides an expansion sleeve type brake disc coupling, including a main shaft body, an installation section at the end of the main shaft body, a brake disc body on the outer surface of the installation section, a plurality of positioning holes on the outer surface of the brake disc body and the outer surface of the main shaft body, a positioning pin inside each positioning hole, an outer ring connected to the inside of the brake disc body, an inner ring connected to the outer surface of the installation section, a plurality of threaded holes on the outer surface of the outer ring and the outer surface of the inner ring, and an expansion bolt threaded to the inner wall of each threaded hole.

[0006] Furthermore, the inner wall of the inner ring is interference-fitted with the outer surface of the mounting section, and the outer wall of the outer ring is interference-fitted with the inner wall of the brake disc body.

[0007] Furthermore, both the inner ring and the outer ring are made of carbon structural steel, and both the outer surfaces of the inner ring and the outer ring are provided with a quenching layer.

[0008] Furthermore, the expansion bolt is a high-strength bolt, and the head of the expansion bolt is provided with an internal hexagonal groove.

[0009] Furthermore, the main shaft body is made of alloy structural steel, and the brake disc body is made of gray cast iron.

[0010] Furthermore, the inner ring has anti-slip ripples on its inner circumference, and the outer ring has a wear-resistant coating on its outer surface.

[0011] Furthermore, the outer surface of the brake disc body is provided with annular heat dissipation grooves.

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

[0013] The technical solution provided in this application has at least the following technical effects or advantages:

[0014] The connection is achieved through the cooperation of the inner ring, outer ring and expansion bolts, avoiding the stress concentration problem of the keyway in the traditional key connection, reducing the risk of fatigue damage to the shaft and hub. The expansion bolts enable detachable connection, which greatly reduces the difficulty of maintenance and maintenance costs, and facilitates the replacement and repair of components. The cooperation between the positioning pin and the positioning hole enhances the positioning accuracy of the brake disc body and the main shaft body, ensuring the stability during transmission. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present application;

[0016] Figure 2 This is a top view of this application;

[0017] Figure 3 This is a bottom view of this application;

[0018] Figure 4 For this application Figure 1 Enlarged structural diagram at point A;

[0019] In the diagram: 1. Spindle body; 2. Mounting section; 3. Brake disc body; 4. Positioning hole; 5. Positioning pin; 6. Outer ring; 7. Inner ring; 8. Threaded hole; 9. Expansion bolt. Detailed Implementation

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example

[0021] Please see Figure 1-4This utility model discloses an expansion sleeve type brake disc coupling, including a main shaft body 1, an installation section 2 at the end of the main shaft body 1, a brake disc body 3 on the outer surface of the installation section 2, and multiple positioning holes 4 on the outer surface of the brake disc body 3 and the outer surface of the main shaft body 1. Each positioning hole 4 has a positioning pin 5 inside, an outer ring 6 is connected to the inside of the brake disc body 3, and an inner ring 7 is connected to the outer surface of the installation section 2. Multiple threaded holes 8 are opened on the outer surfaces of the outer ring 6 and the inner ring 7, and an expansion bolt 9 is threaded to the inner wall of each threaded hole 8. The connection is achieved through the cooperation of the inner ring 7, the outer ring 6 and the expansion bolt 9, avoiding the stress concentration problem of the keyway in traditional key connections, reducing the risk of fatigue damage to the shaft and hub, and enabling detachable connection through the expansion bolt 9, which greatly reduces the difficulty of maintenance and maintenance costs, facilitates the replacement and repair of components, and enhances the positioning accuracy of the brake disc body 3 and the main shaft body 1 through the cooperation of the positioning pin 5 and the positioning hole 4, ensuring stability during transmission. Example

[0022] The inner wall of the inner ring 7 is interference-fitted with the outer surface of the mounting section 2, and the outer wall of the outer ring 6 is interference-fitted with the inner wall of the brake disc body 3. The tight fit between the inner ring 7 and the mounting section 2 creates an initial radial clamping force, ensuring no relative slippage between the inner ring 7 and the main shaft body 1, providing basic support for torque transmission. The tight fit between the outer ring 6 and the inner wall of the brake disc body 3 creates a rigid connection, preventing relative displacement during transmission or braking. Both the inner ring 7 and the outer ring 6 are made of carbon structural steel, and both have a hardened layer on their outer surfaces. Using carbon structural steel for the outer ring 6 and inner ring 7 provides sufficient tensile and yield strength to withstand the stresses generated when the expansion bolts 9 are tightened. The radial pressure and the torque load transmitted during the transmission process ensure the rigidity of the connection structure and avoid brittle fracture. The quenched layer can effectively resist the friction and wear generated when tightening the expansion bolt 9, and prevent the threaded hole 8 from deforming, stripping or being damaged due to long-term stress. At the same time, it can extend the service life of the components. The expansion bolt 9 is a high-strength bolt with an internal hexagonal groove on its head. By using the high-strength bolt 9, it can have higher tensile strength and yield strength, and can withstand greater preload without easily undergoing plastic deformation or fracture, ensuring the stability of the connection structure. By using the internal hexagonal groove on the head, it can effectively prevent the wrench from slipping, reduce the risk of operational errors, and facilitate subsequent disassembly and maintenance operations.

[0023] The main spindle body 1 is made of alloy structural steel, and the brake disc body 3 is made of gray cast iron. Using alloy structural steel for the main spindle body 1 provides high tensile strength, yield strength, and fatigue strength, enabling it to withstand alternating torque, impact loads, and radial pressure from the expansion bolts 9 during transmission. This prevents the spindle from bending or breaking under long-term high-load operation. Using gray cast iron for the brake disc body 3 utilizes its flake graphite for lubrication, friction reduction, chip and heat storage to ensure braking stability. Its good thermal conductivity, combined with heat dissipation grooves, ensures efficient heat dissipation. The inner ring 7 has anti-slip corrugations, and the outer surface of the outer ring 6 has a wear-resistant coating. The anti-slip corrugations on the inner ring 7 increase the contact roughness between the inner ring and the outer surface of the mounting section 2, resulting in… This significantly increases the friction between the two, further preventing relative sliding between the inner ring 7 and the mounting section 2 during transmission, ensuring the stability of torque transmission, and avoiding localized wear or stress concentration caused by sliding. The wear-resistant coating on the outer surface of the outer ring 6 enhances the wear resistance of the contact area between the outer ring 6 and the inner wall of the brake disc body 3, effectively resisting frictional loss, extending the service life of the outer ring 6, and reducing the problem of increased clearance due to wear. The outer surface of the brake disc body 3 is provided with an annular heat dissipation groove. By increasing the surface area of ​​the brake disc body 3, the annular heat dissipation groove significantly improves the heat dissipation efficiency during braking, promotes the diffusion of heat to the external environment, effectively reduces the temperature rise during braking, and avoids the degradation of the mechanical properties of the gray cast iron material due to high temperature.

[0024] The working principle of this application is:

[0025] During assembly, first, the brake disc body 3 is fitted onto the mounting section 2, aligning the positioning holes 4 and inserting the positioning pin 5 to complete the positioning. Then, the outer ring 6 is interference-fitted into the inside of the brake disc body 3, and the inner ring 7 is interference-fitted onto the outer surface of the mounting section 2. Finally, the expansion bolt 9 is screwed into the threaded hole 8 and tightened. The preload of the expansion bolt 9 ensures that the inner ring 7 and outer ring 6 are tightly connected to the mounting section 2 and the brake disc body 3 respectively, realizing torque transmission. During braking, the brake disc body 3 decelerates through friction with the brake pads, while simultaneously using the annular heat dissipation grooves for rapid heat dissipation. During transmission, the anti-slip corrugations and wear-resistant coating ensure stable connection and prevent relative slippage and excessive wear. During maintenance, each component can be disassembled simply by loosening the expansion bolt 9, making the operation convenient.

[0026] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. An expanding collet brake disc coupling characterised in that: The device includes a main spindle body (1), an installation section (2) at the end of the main spindle body (1), a brake disc body (3) on the outer surface of the installation section (2), a plurality of positioning holes (4) on the outer surface of the brake disc body (3) and the outer surface of the main spindle body (1), a positioning pin (5) inside each positioning hole (4), an outer ring (6) connected inside the brake disc body (3), an inner ring (7) connected to the outer surface of the installation section (2), a plurality of threaded holes (8) on the outer surface of the outer ring (6) and the outer surface of the inner ring (7), and an expansion bolt (9) threadedly connected to the inner wall of each threaded hole (8).

2. An expanding collet brake disc coupling according to claim 1 wherein: The inner wall of the inner ring (7) is press-fitted with the outer surface of the mounting section (2), and the outer wall of the outer ring (6) is press-fitted with the inner wall of the brake disc body (3).

3. An expanding collet shaft coupling as defined in claim 1 wherein: Both the inner ring (7) and the outer ring (6) are made of carbon structural steel, and both the outer surface of the inner ring (7) and the outer surface of the outer ring (6) are provided with a quenching layer.

4. The expansion sleeve type brake disc coupling according to claim 1, characterized in that: The expansion bolt (9) is a high-strength bolt, and the head of the expansion bolt (9) is provided with an internal hexagonal groove.

5. The expansion sleeve type brake disc coupling according to claim 1, characterized in that: The main shaft body (1) is made of alloy structural steel, and the brake disc body (3) is made of gray cast iron.

6. The expansion sleeve type brake disc coupling according to claim 1, characterized in that: The inner ring (7) has anti-slip ripples on its inner circumference, and the outer surface of the outer ring (6) has a wear-resistant coating.

7. The expansion sleeve type brake disc coupling according to claim 1, characterized in that: The outer surface of the brake disc body (3) is provided with an annular heat dissipation groove.

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