A idler hub bore quenching inductor
By designing a hardening inductor for the inner bore of the idler hub and adopting a stepped heating wire structure and cooling circulation system, the problem of hardening cracks caused by heating the inner bore and end face of the idler hub in stages was solved, achieving uniform heating and improved production efficiency.
Patent Information
- Application Number
- CN202522383369.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-10
AI Technical Summary
In existing technologies, the heating of the inner hole and end face of the idler hub is carried out in two separate processes, which leads to a high risk of overlapping hardened layers, resulting in quenching cracks, high scrap rate, and low production efficiency.
A quenching inductor for an idler hub is designed, which adopts a "stepped" structure composed of a first arc heating wire, a second arc heating wire, and a vertical heating wire. A high-frequency current is passed through the base to heat the end face and inner hole of the workpiece simultaneously, and the heat is removed in time through a cooling circulation system.
This achieves uniform heating in the workpiece quenching zone, avoids the generation of quenching cracks, and improves production efficiency and the performance of parts.
Smart Images
Figure CN224930603U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inductors for heating and quenching, specifically to a quenching inductor for the inner hole of an idler hub. Background Technology
[0002] An idler hub, typically referring to a sprocket idler, is a deflector used in conjunction with a sprocket in a transmission system. Its primary function is to reduce chain tension fluctuations and balance transmission efficiency. Idler hubs are often used in conjunction with sprockets; by adding an idler wheel to the transmission path, they disperse the impact force on the chain, reducing the risk of wear or breakage caused by uneven chain tension. For example, in a transmission system, idler hubs are commonly used to adjust chain tension, ensuring smooth transmission when shifting between gears.
[0003] The main functions of an idler wheel include changing the direction of rotation of the driven wheel, increasing the transmission distance, and adjusting the pressure angle. The idler wheel acts as a transitional component in the gear train; it does not change the transmission relationship but rather aims to optimize the force distribution on the gear train or to suit the overall layout of the transmission system. Its function is only to change the direction of rotation, not the transmission ratio. Idler wheels can extend the wheelbase. The number of teeth on an idler wheel does not affect the numerical value of the transmission ratio, but it does affect the direction of rotation of the last wheel. As a wheel that does not perform work, it has a certain energy storage function, which helps stabilize the system. Therefore, parts like idler wheel hubs require heat treatment to achieve higher hardness, wear resistance, and a longer service life. Quenching is typically used to achieve these requirements.
[0004] To achieve high hardness, wear resistance, and a long service life in idler wheel hubs, induction hardening is a suitable method. This is because it heats up quickly, achieving high hardness, high wear resistance, and a long service life while maintaining relatively low core hardness, thus providing good toughness. However, commonly used inductors cannot simultaneously heat the inner bore and end face of the idler wheel hub, requiring two heating stages. This carries the risk of overlapping hardened layers, increasing the likelihood of quenching cracks, leading to a higher scrap rate or highly unstable deformation, affecting performance. Furthermore, the two-stage heating results in a longer quenching time and lower production efficiency. Therefore, this type of inductor was designed to meet the technical requirements of the parts and improve production efficiency. Summary of the Invention
[0005] The technical problem to be solved by this utility model is to provide a quenching inductor for the inner hole of an idler hub, which can effectively solve the problems in the prior art.
[0006] The technical solution adopted by this utility model is: an idler hub inner hole quenching inductor, including a base fixedly installed with a machine tool, an insulating diaphragm is embedded in the inner surface of the end of the base away from the machine tool, a busbar unit is fixedly installed on the outer surface of the end of the base away from the machine tool, and a heating wire unit is fixedly connected to the end of the busbar unit away from the base. The manifold unit includes an inlet wire and an outlet wire. The end of the inlet wire closest to the machine tool is fixedly connected to a first manifold connector, and the end of the outlet wire closest to the machine tool is fixedly connected to a second manifold connector. A vertical inlet pipe is fixedly installed at the end of the inlet wire furthest from the first manifold connector, and a vertical outlet pipe is fixedly installed at the end of the outlet wire furthest from the second manifold connector.
[0007] Preferably, the base includes a left support and a right support, and the insulating spacer is located between the left support and the right support.
[0008] The above technical solution effectively blocks current conduction between the left and right support seats by setting an insulating partition between them, preventing high-frequency current from the busbar unit from flowing through the base to the machine tool and reducing the risk of equipment leakage.
[0009] Preferably, the heating wire unit includes a first arc-shaped heating wire and a second arc-shaped heating wire, with a vertical heating wire disposed between the first arc-shaped heating wire and the second arc-shaped heating wire.
[0010] The above technical solution divides the heating wire unit into a first arc heating wire and a second arc heating wire, and connects them through a vertical heating wire to ensure that the heating area is completely matched with the target heating position of the idler hub inner hole.
[0011] Preferably, the first arc-shaped heating wire, the second arc-shaped heating wire, and the vertical heating wire are integrally bent and formed.
[0012] By employing the above technical solution, and by integrally bending the first arc-shaped heating wire, the second arc-shaped heating wire, and the vertical heating wire, weld seams are avoided, significantly reducing the risk of water leakage.
[0013] Preferably, the first arc-shaped heating wire, the second arc-shaped heating wire, and the vertical heating wire are made of copper tubing connected in series, and the cross-section formed by the first arc-shaped heating wire, the second arc-shaped heating wire, and the vertical heating wire has a "step" shaped structure.
[0014] The above technical solution involves using a series connection of a first arc-shaped heating wire, a second arc-shaped heating wire, and a vertical heating wire made of copper tubing. Copper tubing possesses excellent electrical and thermal conductivity, allowing it to efficiently conduct induced current and improve heating efficiency. Its good thermal conductivity also helps disperse localized heat, preventing damage from overheating. Furthermore, the cross-section formed by the first arc-shaped heating wire, the second arc-shaped heating wire, and the vertical heating wire has a stepped structure. During quenching, a high-frequency current is passed through the base. The first and second arc-shaped heating wires simultaneously heat the end face and inner hole of the workpiece, ensuring uniform heating and stable deformation in the quenching area, preventing quenching cracks, and improving production efficiency.
[0015] Preferably, the vertical liquid inlet pipe is connected to the liquid inlet wire and the heating wire unit, and the vertical liquid outlet pipe is connected to the liquid outlet wire and the heating wire unit.
[0016] Through the above technical solution, the vertical liquid inlet pipe is connected to the liquid inlet wire and the heating wire unit, and the vertical liquid outlet pipe is connected to the liquid outlet wire and the heating wire unit. Cooling water enters the liquid inlet wire through the base, and then enters the heating wire unit through the vertical liquid inlet pipe, thereby timely removing the heat generated by heating. Subsequently, the coolant enters the liquid outlet wire through the vertical liquid outlet pipe, and finally exits from the base, forming a stable cooling cycle.
[0017] Compared with the prior art, this utility model provides a hardening inductor for the inner bore of an idler hub, which has the following advantages: 1. The idler hub inner hole quenching inductor has a stepped cross-section formed by a first arc-shaped heating wire, a second arc-shaped heating wire, and a vertical heating wire. During quenching, a high-frequency current is passed through the base in the circuit. The first and second arc-shaped heating wires simultaneously heat the two parts of the workpiece that need quenching: the end face and the inner hole. This ensures uniform heating and stable deformation in the quenching area, avoids quenching cracks, and improves production efficiency. 2. The idler hub inner hole quenching inductor is connected to the inlet wire and heating wire unit through a vertical liquid inlet pipe, and the vertical liquid outlet pipe is connected to the outlet wire and heating wire unit. Cooling water enters the inlet wire through the base, and then enters the heating wire unit through the vertical liquid inlet pipe, thereby timely removing the heat generated by heating. Subsequently, the coolant enters the outlet wire through the vertical liquid outlet pipe, and finally exits from the base, forming a stable cooling cycle. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a side view of the sensor structure of this utility model; Figure 4 This is a front view structural diagram of the sensor of this utility model; Figure 5 This is a schematic diagram of the connection structure between the busbar unit and the heating wire unit of this utility model.
[0019] The components include: 1. Base; 101. Left support seat; 102. Right support seat; 2. Insulating partition; 3. Busbar unit; 301. Inlet wire; 302. Outlet wire; 303. First busbar connector; 304. Second busbar connector; 305. Vertical inlet pipe; 306. Vertical outlet pipe; 4. Heating wire unit; 401. First arc-shaped heating wire; 402. Vertical heating wire; 403. Second arc-shaped heating wire. Detailed Implementation
[0020] 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.
[0021] Example 1: As Figure 1-5 As shown, the present invention provides an idler hub inner hole quenching inductor, including a base 1 fixedly installed with a machine tool, an insulating diaphragm 2 embedded in the inner surface of the end of the base 1 away from the machine tool, a busbar unit 3 fixedly installed on the outer surface of the end of the base 1 away from the machine tool, and a heating wire unit 4 fixedly connected to the end of the busbar unit 3 away from the base 1. The manifold unit 3 includes an inlet wire 301 and an outlet wire 302. The end of the inlet wire 301 closest to the machine tool is fixedly connected to a first manifold connector 303, and the end of the outlet wire 302 closest to the machine tool is fixedly connected to a second manifold connector 304. A vertical inlet pipe 305 is fixedly installed at the end of the inlet wire 301 furthest from the first manifold connector 303, and a vertical outlet pipe 306 is fixedly installed at the end of the outlet wire 302 furthest from the second manifold connector 304.
[0022] Specifically, the base 1 includes a left support 101 and a right support 102, with an insulating spacer 2 located between the left support 101 and the right support 102. The advantage is that by providing the insulating spacer 2 between the left support 101 and the right support 102, current conduction between them can be effectively blocked, preventing high-frequency current from the busbar unit 3 from flowing through the base 1 to the machine tool, thus reducing the risk of equipment leakage.
[0023] Specifically, the heating wire unit 4 includes a first arc-shaped heating wire 401 and a second arc-shaped heating wire 403, with a vertical heating wire 402 positioned between the first arc-shaped heating wire 401 and the second arc-shaped heating wire 403. The advantage is that by dividing the heating wire unit 4 into the first arc-shaped heating wire 401 and the second arc-shaped heating wire 403 and connecting them via the vertical heating wire 402, it ensures that the heating area perfectly matches the target heating position within the idler hub's inner bore.
[0024] Specifically, the first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 are integrally bent. The advantage is that by using an integral bending mechanism for these components, weld seams are avoided, significantly reducing the risk of leakage.
[0025] Example 2: Figure 2-5 As shown, this is an improvement on the previous embodiment.
[0026] Specifically, the first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 are made of copper tubing connected in series, and the cross-section formed by the first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 has a "step" shaped structure. The advantages are that by setting the first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 to be connected in series using copper tubing, the copper tubing, with its excellent electrical and thermal conductivity, can efficiently conduct induced current as a heating wire, improving heating efficiency. At the same time, its good thermal conductivity can help disperse local heat, preventing the wire from being damaged due to local overheating. Furthermore, the cross-section formed by the first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 has a "stepped" structure. During quenching, a high-frequency current is passed through the base 1 into the circuit. The first arc-shaped heating wire 401 and the second arc-shaped heating wire 403 simultaneously heat the two parts of the workpiece that need to be quenched: the end face and the inner hole. This ensures uniform heating of the workpiece quenching area, stable deformation, avoids quenching cracks, and improves production efficiency.
[0027] Specifically, the vertical inlet pipe 305 is connected to the inlet wire 301 and the heating wire unit 4, and the vertical outlet pipe 306 is connected to the outlet wire 302 and the heating wire unit 4. The advantage is that, through the vertical inlet pipe 305 connecting to the inlet wire 301 and the heating wire unit 4, and the vertical outlet pipe 306 connecting to the outlet wire 302 and the heating wire unit 4, cooling water enters the inlet wire 301 through the base 1, then enters the heating wire unit 4 through the vertical inlet pipe 305, thus promptly removing the heat generated by heating. Subsequently, the coolant enters the outlet wire 302 through the vertical outlet pipe 306 and is finally discharged from the base 1, forming a stable cooling cycle.
[0028] Working Principle: In use, the base 1 is first connected and fixed to the machine tool. The vertical inlet pipe 305 connects to the inlet wire 301 and the heating wire unit 4, while the vertical outlet pipe 306 connects to the outlet wire 302 and the heating wire unit 4. Cooling water enters the inlet wire 301 through the base 1, then enters the heating wire unit 4 through the vertical inlet pipe 305, thus promptly removing the heat generated during heating. Subsequently, the coolant enters the outlet wire 302 through the vertical outlet pipe 306 and finally exits from the base 1, forming a stable cooling cycle. The first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 are connected in series using copper tubing. Copper tubing possesses excellent electrical and thermal conductivity, enabling efficient conduction of induced current and improving heating efficiency. Simultaneously, its good thermal conductivity helps disperse localized heat and prevents heat loss. The heating wire was damaged due to localized overheating. The cross-section formed by the first arc-shaped heating wire 401, the second arc-shaped heating wire 403, and the vertical heating wire 402 is a "stepped" structure. During quenching, a high-frequency current is supplied to the circuit through the base 1. The first arc-shaped heating wire 401 and the second arc-shaped heating wire 403 simultaneously heat the two parts of the workpiece that need quenching: the end face and the inner hole. This ensures uniform heating and stable deformation in the quenching area, preventing quenching cracks and improving production efficiency. During quenching, a high-frequency current is supplied to the circuit through the first busbar connector 303 and the second busbar connector 304. The first arc-shaped heating wire 401 and the second arc-shaped heating wire 403 simultaneously heat the two parts of the workpiece that need quenching: the end face and the inner hole. This ensures uniform heating and stable deformation in the quenching area, preventing quenching cracks and improving production efficiency.
[0029] 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 quenching inductor for the inner bore of an idler hub, characterized in that: Includes a base (1) fixedly installed with the machine tool, wherein an insulating diaphragm (2) is embedded in the inner surface of the end of the base (1) away from the machine tool, and a busbar unit (3) is fixedly installed on the outer surface of the end of the base (1) away from the machine tool, and a heating wire unit (4) is fixedly connected to the end of the busbar unit (3) away from the base (1). The manifold unit (3) includes an inlet wire (301) and an outlet wire (302). The inlet wire (301) is fixedly connected to a first manifold connector (303) at one end near the machine tool. The outlet wire (302) is fixedly connected to a second manifold connector (304) at one end near the machine tool. A vertical inlet pipe (305) is fixedly installed at one end of the inlet wire (301) away from the first manifold connector (303). A vertical outlet pipe (306) is fixedly installed at one end of the outlet wire (302) away from the second manifold connector (304).
2. The inertia hub inner bore quenching inductor according to claim 1, characterized in that: The base (1) includes a left support (101) and a right support (102), and the insulating spacer (2) is located between the left support (101) and the right support (102).
3. The inertia hub inner bore quenching inductor according to claim 1, characterized in that: The heating wire unit (4) includes a first arc-shaped heating wire (401) and a second arc-shaped heating wire (403), and a vertical heating wire (402) is provided between the first arc-shaped heating wire (401) and the second arc-shaped heating wire (403).
4. The inertia hub inner bore quenching inductor according to claim 3, characterized in that: The first arc-shaped heating wire (401), the second arc-shaped heating wire (403), and the vertical heating wire (402) are integrally bent.
5. A hardening inductor for the inner bore of an idler hub according to claim 3, characterized in that: The first arc-shaped heating wire (401), the second arc-shaped heating wire (403), and the vertical heating wire (402) are connected in series using copper tubing. The cross-section formed by the first arc-shaped heating wire (401), the second arc-shaped heating wire (403), and the vertical heating wire (402) has a "step" shaped structure.
6. The inertia hub inner bore quenching inductor according to claim 1, characterized in that: The vertical inlet pipe (305) is connected to the inlet wire (301) and the heating wire unit (4), and the vertical outlet pipe (306) is connected to the outlet wire (302) and the heating wire unit (4).