Heating tool for maintenance treatment of shaft inner ring workpiece

Abstract

The utility model belongs to the technical field of heating equipment, and discloses a heating tool for maintenance treatment of a shaft inner ring workpiece, which comprises an aluminum strip coil and a controller, a plurality of closely arranged mounting frames are arranged on the outer side of the aluminum strip coil, heating plates are arranged in the mounting frames, and electrifying heads electrically connected with the heating plates in the mounting frames are arranged on the inner side of the aluminum strip coil. The two free ends of the aluminum strip coil are each provided with a fixing base with a positioning hole, the two free ends of the aluminum strip coil are connected together through the fixing bases and bolts, and the controller is electrically connected with the heating plate. According to the heating tool, the curling degree of the aluminum strip coil can be flexibly adjusted according to the shaft inner ring workpiece to be heated, so that the heating tool is suitable for shaft inner ring workpieces with different inner diameters, the applicability is higher, the heating effect is better, and less energy is wasted.

Description

Technical Field

[0001] This utility model belongs to the field of heating equipment technology, specifically relating to a heating tool for repairing and processing workpieces with inner rings of shafts. Background Technology

[0002] Shaft sleeves are key components in mechanical transmission systems used for gear shafts or coupling assemblies, primarily serving to support, position, and protect. They possess the following core functions: 1) Support and Fixation: Installed on the gear shaft or coupling, they support the bearing and gear shaft through an inner and outer sleeve structure, preventing misalignment due to centrifugal force or vibration during high-speed rotation and ensuring transmission stability; 2) Protection and Wear Resistance: Made of metals (such as copper or bimetallic materials), they possess wear-resistant and corrosion-resistant properties, reducing direct wear between the shaft and its housing and extending the shaft's service life; 3) Replacement for Sliding Bearings: In low-speed, high radial load, or scenarios with strict clearance requirements, shaft sleeves can replace rolling bearings, reducing friction and operating noise while saving costs; 4) Heat Dissipation and Vibration Reduction: Utilizing the material's thermal conductivity to aid heat dissipation and absorb mechanical vibration, improving the smoothness of equipment operation.

[0003] Heating the internal gear sleeve of a gear shaft has significant value in mechanical assembly and performance optimization, specifically as follows:

[0004] I. Achieving Precision Assembly Using the Principle of Thermal Expansion

[0005] Reduce assembly resistance: High-frequency induction heating (such as electromagnetic eddy current heating) causes the inner hole of the inner gear sleeve to expand due to heat, thereby increasing the fitting clearance. This allows the gear shaft to be easily fitted into the predetermined position, avoiding surface scratches or deformation caused by forced pressing.

[0006] Improved fit accuracy: Precise temperature control (usually heating to 200-300℃) can control the amount of expansion. After cooling, the inner gear sleeve forms an interference fit with the shaft, ensuring stable axial positioning of the transmission system and reducing the risk of vibration.

[0007] II. Reduce mechanical damage and processing costs

[0008] Avoid hard contact wear: The hardness of the inner gear sleeve is temporarily reduced after heating, which reduces frictional damage to the gear shaft surface during assembly and extends the service life of the component.

[0009] Alternative to complex machining processes: Compared to the wheel diameter that requires extremely high machining accuracy for traditional cold pressing assembly, the heating method can relax tolerance requirements and reduce machining difficulty and cost.

[0010] III. Optimizing Material Properties and Long-Term Stability

[0011] Improved fatigue resistance: Local heating combined with heat treatment processes (such as quenching) can form a hardened layer on the surface of the internal gear sleeve, improving wear resistance and fatigue strength, and adapting to heavy load or high frequency transmission requirements.

[0012] Reduce residual stress: Uniform heating and cooling processes can reduce the internal stress generated during assembly, preventing deformation or cracking caused by stress release during long-term use.

[0013] IV. Adapting to Special Working Conditions

[0014] To handle complex installation environments: In confined spaces or areas with a high density of components, the heating method does not require large pressing equipment, making operation more flexible.

[0015] Compatible with different material combinations: For bimetallic bushings or plastic-based inner gear sleeves, heating can avoid stress imbalance between materials with different coefficients of thermal expansion.

[0016] Currently, the tools used for heating inner ring workpieces such as gear sleeves are limited in size and cannot be adjusted to accommodate workpieces of different dimensions. Furthermore, the heating surface of existing tools cannot get close enough to the inner ring workpiece to be heated, resulting in poor heating performance and significant energy waste. Utility Model Content

[0017] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a heating tool for the repair and processing of shaft inner ring workpieces, aiming to solve the problems of existing heating tools having limited specifications, poor applicability, poor heating effect, and serious energy waste.

[0018] To achieve the above objectives, this utility model is configured as follows:

[0019] A heating tool for repairing inner ring workpieces includes an aluminum strip coil. The outer side of the aluminum strip coil is provided with several closely arranged mounting frames, each of which is equipped with a heating plate. The inner side of the aluminum strip coil is provided with a power head that is electrically connected to the heating plate in each mounting frame. Both free ends of the aluminum strip coil are provided with a fixing seat with positioning holes. The two free ends of the aluminum strip coil are connected together by the fixing seat and bolts.

[0020] The heating tool is also equipped with a controller, which is electrically connected to the heating plate.

[0021] Furthermore, the mounting base is detachably connected to the aluminum strip roll.

[0022] This structural design allows for the replacement and disassembly of the mounting base as needed. After disassembly, the curvature of the aluminum strip coil can be easily adjusted to accommodate inner ring workpieces with different inner diameters.

[0023] Furthermore, a U-shaped rod is rotatably connected to the middle of the upper and lower sides of the mounting frame at one end of the aluminum strip coil. The end of the U-shaped rod near the mounting frame extends into the mounting frame and is fixedly connected to a circular plate that is slidably connected to the mounting frame. A spring is provided on the upper side of the circular plate and is fixedly connected to the mounting frame. In addition to the mounting frame with the U-shaped rod, the remaining mounting frames of the aluminum strip coil have positioning grooves in the middle of the upper and lower sides. The mounting frames where the U-shaped rod is located have placement grooves in the upper and lower sides. The positioning grooves and placement grooves are all matched with the free vertical section of the U-shaped rod.

[0024] With this structural design, once the curvature of the aluminum strip coil is adjusted, the coiled aluminum strip can be fixed by a U-shaped rod with a spring.

[0025] Furthermore, the heating tool is also equipped with an inner support mechanism, which is used to support the aluminum strip coil externally, so that the aluminum strip coil is cylindrical.

[0026] This structural design, through the internal support mechanism and external support of the aluminum strip coil, prevents the aluminum strip coil from deforming significantly, making the aluminum strip coil roughly cylindrical.

[0027] Furthermore, the internal support mechanism includes a base and a vertical rod mounted on the base. The upper end of the vertical rod is provided with three telescopic rods arranged in a circular array around the vertical rod as the axis. The free ends of the telescopic rods are all fixedly connected to vertically arranged arc-shaped plates.

[0028] This structural design allows for flexible adjustment of the telescopic rod length according to the curvature of the aluminum strip coil, ensuring that the curved plate always abuts against the inner side of the aluminum strip coil, thus enhancing its applicability.

[0029] Furthermore, the heating plate is detachably connected to the mounting frame.

[0030] This structural design makes it easy to disassemble and replace the heating plate.

[0031] Beneficial effects:

[0032] 1. This utility model discloses a heating tool for repairing and processing inner ring workpieces of shafts. It is equipped with an aluminum strip coil, a mounting frame, a heating plate, a fixing seat, a U-shaped rod, a circular plate, a spring, a positioning groove, and a placement groove. It can flexibly adjust the curvature of the aluminum strip coil according to the inner ring workpiece to be heated, thereby adapting to inner ring workpieces of different inner diameters. It has stronger applicability, better heating effect, and less energy waste.

[0033] 2. The heating tool for repairing inner ring workpieces of this utility model is further provided with an inner support mechanism, a base, a vertical rod, a telescopic rod and an arc plate. The length of the telescopic rod can be flexibly adjusted according to the curvature of the aluminum strip coil, so that the arc plate always abuts against the inner side of the aluminum strip coil, thereby making the aluminum strip coil stably maintain its cylindrical shape during the heating process. Attached Figure Description

[0034] Figure 1 This is a top view of the heating tool of this utility model;

[0035] Figure 2 A partial schematic diagram of the aluminum coil mounting frame side;

[0036] Figure 3 This is a top view of the heating tool of this utility model after it has been curled up;

[0037] Figure 4 This is a partial side sectional view of the mounting frame;

[0038] Figure 5 This is a top view of the internal support mechanism;

[0039] Figure 6 This is a front view of the internal support mechanism;

[0040] The attached diagram is labeled as follows: 1. Aluminum strip coil; 2. Mounting frame; 3. Heating plate; 4. Fixing base; 5. U-shaped rod; 6. Round plate; 7. Spring; 8. Positioning groove; 9. Placement groove; 10. Base; 11. Upright pole; 12. Telescopic rod; 13. Arc plate. Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0042] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0043] like Figures 1-6As shown, this utility model discloses a heating tool for repairing inner ring workpieces of a shaft, including an aluminum strip roll 1. Several closely arranged mounting frames 2 are provided on the outer side of the aluminum strip roll 1. Each mounting frame 2 is equipped with a detachable heating plate 3. An electric head that is electrically connected to the heating plate 3 in each mounting frame 2 is provided on the inner side of the aluminum strip roll 1. Both free ends of the aluminum strip roll 1 are fixedly connected to a fixing seat 4 with positioning holes. The two free ends of the aluminum strip roll 1 are connected together by the fixing seat 4 and bolts.

[0044] The heating tool of this utility model is also equipped with a controller, which is electrically connected to the heating plate 3.

[0045] As a preferred embodiment, the fixing base 4 is detachably connected to the aluminum strip roll 1.

[0046] In a preferred embodiment, a U-shaped rod 5 is rotatably connected to the middle of both the upper and lower sides of the first mounting frame 2 located at the left end of the aluminum strip coil 1. One end of the U-shaped rod 5 near the mounting frame 2 extends into the mounting frame 2 and is fixedly connected to a circular plate 6 that is slidably connected to the mounting frame 2. A spring 7, fixedly connected to the mounting frame 2, is provided on the outer side of the circular plate 6. Under the elastic action of the spring 7, the U-shaped rod 5 moves towards the mounting frame 2. In addition to the mounting frame 2 with the U-shaped rod 5, the remaining mounting frames 2 of the aluminum strip coil 1 have positioning grooves 8 on the middle of both the upper and lower sides. The mounting frames 2 containing the U-shaped rod 5 also have placement grooves 9 on both the upper and lower sides. Both the positioning grooves 8 and the placement grooves 9 cooperate with the free vertical section of the U-shaped rod 5.

[0047] As a preferred embodiment, the heating tool is also equipped with an internal support mechanism, which is used to externally support the aluminum strip coil 1, making the aluminum strip coil 1 cylindrical. The internal support mechanism of this embodiment includes a base 10 and a vertical rod 11 disposed on the base 10. Three telescopic rods 12 are fixedly connected to the upper end of the vertical rod 11, which are arranged in a circular array around the vertical rod 11. The telescopic rods 12 are perpendicular to the vertical rod 11, and the free ends of the telescopic rods 12 are fixedly connected to vertically arranged arc-shaped plates 13.

[0048] When the aluminum strip coil 1 is fitted to the inner ring workpiece to be heated, the two free ends of the aluminum strip coil 1 are fixedly connected together by the fixing seat 4 and bolts. Then, the fixed aluminum strip coil 1 is placed in the inner ring of the inner ring workpiece and supported by the inner support mechanism to keep the aluminum strip coil 1 stably in a cylindrical shape. After that, the heating plate 3 is started by the controller to heat the inner ring workpiece.

[0049] When the aluminum strip coil 1 does not fit the inner ring workpiece to be heated, the fixing seat 4 on the inner side of the aluminum strip coil 1 needs to be removed first. Then, the degree of curling of the aluminum strip coil 1 is adjusted until the curled aluminum strip coil 1 fits the inner ring workpiece to be heated. In this case, the mounting frame 2 with the U-shaped rod 5 of the curled aluminum strip coil 1 is aligned with the corresponding inner mounting frame 2. Then, the U-shaped rods 5 on the upper and lower sides of the leftmost mounting frame 2 are pulled outward so that the free vertical section of the U-shaped rod 5 leaves the placement groove 9. Then, the U-shaped rod 5 is rotated so that the free vertical section of the U-shaped rod 5 is aligned with the positioning groove 8 of the corresponding inner mounting frame 2. After that, the force applied to the U-shaped rod 5 is released. Under the elastic action of the spring 7, the free vertical section of the U-shaped rod 5 extends into the positioning groove, thereby fixing the curled aluminum strip coil 1. The fixed aluminum strip coil 1 is then placed in the inner ring of the shaft inner ring workpiece, and an internal support mechanism is used for auxiliary support to keep the aluminum strip coil 1 stably in a cylindrical shape. Then, the corresponding heating plate 3 is activated by the controller to heat the shaft inner ring workpiece.

[0050] 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A heating tool for repairing and processing inner ring workpieces of shafts, characterized in that: The package includes an aluminum strip coil (1), which has several closely arranged mounting frames (2) on its outer side. Each mounting frame (2) is equipped with a heating plate (3). The aluminum strip coil (1) has an electrical head that is electrically connected to the heating plate (3) in each mounting frame (2). Both free ends of the aluminum strip coil (1) are equipped with a fixing seat (4) with positioning holes. The two free ends of the aluminum strip coil (1) are connected together by the fixing seat (4) and bolts. The heating tool is also equipped with a controller, which is electrically connected to the heating plate (3).

2. The heating tool for repairing inner ring workpieces according to claim 1, characterized in that: The fixing seat (4) is detachably connected to the aluminum strip roll (1).

3. A heating tool for repairing inner ring workpieces according to claim 2, characterized in that: U-shaped rods (5) are rotatably connected to the middle of the upper and lower sides of the mounting frame (2) at one end of the aluminum strip coil (1). The end of the U-shaped rod (5) near the mounting frame (2) extends into the mounting frame (2) and is fixedly connected to a circular plate (6) that is slidably connected to the mounting frame (2). A spring (7) is fixedly connected to the mounting frame (2) on the upper side of the circular plate (6). In addition to the mounting frame with the U-shaped rod (5), the remaining mounting frames (2) of the aluminum strip coil (1) are provided with positioning grooves (8) in the middle of the upper and lower sides. The mounting frames (2) where the U-shaped rod (5) is located are provided with placement grooves (9) in the upper and lower sides. The positioning grooves (8) and placement grooves (9) are both matched with the free vertical section of the U-shaped rod (5).

4. A heating tool for repairing inner ring workpieces according to claim 3, characterized in that: The heating tool is also equipped with an inner support mechanism, which is used to support the aluminum strip coil (1) externally, so that the aluminum strip coil (1) is cylindrical.

5. A heating tool for repairing inner ring workpieces according to claim 4, characterized in that: The internal support mechanism includes a base (10) and a vertical rod (11) set on the base (10). The upper end of the vertical rod (11) is provided with three telescopic rods (12) arranged in a circular array with the vertical rod (11) as the axis. The free ends of the telescopic rods (12) are all fixedly connected to vertically arranged arc plates (13).

6. A heating tool for repairing inner ring workpieces according to claim 1, characterized in that: The heating plate (3) is detachably connected to the mounting frame (2).

Images