Bearing heating equipment

Abstract

The invention relates to the technical field of bearing assembly, in particular to bearing heating equipment which comprises a shell and a heating assembly, and a holding part is arranged on the shell; the heating assembly is arranged on one side of the shell, the heating assembly comprises a plurality of heating units evenly distributed in the circumferential direction, the heating units can move in the radial direction, and the outer surfaces of the heating units form a heating surface used for abutting against the inner ring of the bearing. The use reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing assembly, and in particular to a bearing heating device. Background Art

[0002] With the continuous improvement of industrial automation, bearings, as key components in mechanical equipment, have a direct impact on the overall performance and service life of the equipment through their installation process. As one of the most important methods for bearing installation, thermal assembly requires heating equipment that can quickly and evenly heat the bearings.

[0003] Currently, commonly used bearing heating systems include oil bath heating and induction heating. Oil bath heating presents challenges such as oil contamination, uneven temperature distribution, and low heating efficiency. While induction heating offers higher heating efficiency, it is bulky, difficult to carry, and requires an external power supply, making it difficult to use at some repair sites. Furthermore, existing portable bearing heating systems often have fixed structures and can only be used with bearings of specific specifications, limiting their scope of application. Summary of the Invention

[0004] The present invention provides a bearing heating device, which is convenient to carry and operate, and can be applied to bearings of different specifications, thereby improving the reliability of use.

[0005] The present invention provides a bearing heating device, comprising: a shell, on which a gripping portion is provided; a heating assembly, which is arranged on one side of the shell, and the heating assembly includes a plurality of heating units uniformly distributed along the circumferential direction, each heating unit being movable in the radial direction, and the outer surface of each heating unit constituting a heating surface for abutting the inner ring of the bearing.

[0006] In a possible implementation, a first sliding structure is radially provided on the shell; each heating unit includes: a sliding bracket that slides with the first sliding structure; and a flexible heating belt that is provided on the outer peripheral side of the sliding bracket.

[0007] In a possible implementation, the heating device further includes a driving mechanism for driving the multiple sliding brackets to move synchronously, a driving portion is provided at one end of the sliding bracket facing the center of the heating assembly, and the driving mechanism is connected to the driving portion.

[0008] In one possible implementation, the driving mechanism includes: a threaded tube, rotatably connected to the shell; a threaded rod, threadedly connected to the threaded tube; and a driving block, arranged at one end of the threaded rod; wherein the driving block is circumferentially provided with a plurality of wedge-shaped surfaces that slide in cooperation with the driving part.

[0009] In a possible implementation, a T-slot or a dovetail groove is provided on the wedge surface, and the driving portion is provided with a slider that slidably cooperates with the T-slot or the dovetail groove.

[0010] In one possible implementation, the threaded tube and the shell can slide axially; the heating device also includes a spring, a limiting ring is provided on the outer periphery of the threaded tube, one end of the spring abuts against the limiting ring, and the other end abuts against the shell.

[0011] In a possible implementation, an arcuate surface is provided on the outer periphery of the sliding bracket, an arcuate installation groove for accommodating the flexible heating belt is provided on the arcuate surface, and an insertion guide surface is provided on one end of the arcuate surface away from the shell.

[0012] In a possible implementation, thermally conductive silicone is provided between two adjacent flexible heating belts, and both ends of the thermally conductive silicone are respectively connected to the flexible heating belts or the sliding bracket.

[0013] In a possible implementation, the thermally conductive silicone is in a strip shape, and an arc-shaped protrusion is provided on a side of the thermally conductive silicone away from the driving portion.

[0014] In a possible implementation, a pressure switch is provided on the housing, and the pressure switch abuts against the limit ring and is electrically connected to the flexible heating belt.

[0015] The above technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0016] The bearing heating device provided in an embodiment of the present invention is convenient for carrying and operation through the gripping portion. When the bearing needs to be heated, multiple heating units can be moved radially to adjust the diameter of the entire heating assembly, thereby being suitable for bearing inner rings with different inner diameters. The inner ring of the bearing can then be heated by the heating surface of the heating unit. This makes carrying and operation convenient and can be suitable for bearings of different specifications, thereby improving reliability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1A schematic diagram of the three-dimensional structure of a bearing heating device provided by an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the bearing heating device from another angle is shown;

[0022] Figure 3 A schematic structural diagram of the connection between a heating unit and a driving mechanism provided in an embodiment of the present invention;

[0023] Figure 4 for Figure 3 A local enlarged structural diagram of point A;

[0024] Figure 5 A schematic cross-sectional view of a bearing heating device provided by an embodiment of the present invention;

[0025] Figure 6 for Figure 5 A schematic diagram of the partially enlarged structure at point B;

[0026] Figure 7 for Figure 5 A schematic diagram of the partially enlarged structure at point C;

[0027] Figure 8 A schematic structural diagram of a housing provided in an embodiment of the present invention;

[0028] Figure 9 A schematic diagram of the structure of a flexible heating belt and thermally conductive silicone rubber connected to each other according to an embodiment of the present invention;

[0029] Figure 10 A schematic cross-sectional view of a flexible heating belt provided in an embodiment of the present invention;

[0030] Figure 11 A schematic diagram of a partial structure of a heat-conducting layer provided in an embodiment of the present invention;

[0031] Figure 12 A schematic diagram of the partial structure of a thermally conductive silica gel provided in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Housing; 11. Grip; 12. First sliding structure; 13. Pressure switch;

[0034] 2. Heating assembly; 21. Heating unit; 211. Sliding bracket; 2111. Driving portion; 2112. Sliding block; 2113. Arc-shaped mounting groove; 2114. Insertion guide surface; 212. Flexible heating belt; 2121. Heat-conducting layer; 21211. Heat-conducting unit; 21212. Flexible connecting belt; 2122. Heating layer;

[0035] 3. Driving mechanism; 31. Threaded tube; 32. Threaded rod; 33. Driving block; 331. Wedge-shaped surface; 34. Limiting ring;

[0036] 4. Spring; 5. Thermally conductive silicone; 51. Arc-shaped protrusion; 52. Honeycomb elastic support structure; 53. Thermally conductive microspheres;

[0037] 6. Battery; 7. Power button. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0040] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0041] The present invention provides a bearing heating device, which is convenient to carry and operate, and can be applied to bearings of different specifications, thereby improving the reliability of use.

[0042] like Figures 1-12 As shown, an embodiment of the present invention provides a bearing heating device, comprising: a housing 1 and a heating assembly 2, wherein:

[0043] The housing 1 is provided with a grip portion 11 .

[0044] The heating assembly 2 is arranged on one side of the shell 1. The heating assembly 2 includes a plurality of heating units 21 uniformly distributed along the circumferential direction. Each heating unit 21 can move radially. The outer surface of each heating unit 21 constitutes a heating surface for abutting the inner ring of the bearing.

[0045] The heating assembly 2 comprises a plurality of heating units 21 distributed circumferentially to form a continuous or discontinuous annular structure. The heating surface on the outer periphery of the annular structure heats the inner ring of the bearing. The heating units 21 are movable radially, where the radial direction is the radial direction of the annular structure formed by the plurality of heating units 21.

[0046] In the present invention, the holding portion 11 facilitates carrying operations. When the bearing needs to be heated, multiple heating units 21 can be moved radially to adjust the diameter of the entire heating assembly 2, so that it is suitable for bearing inner rings with different inner diameters. Then, the inner ring of the bearing can be heated by the heating surface of the heating unit 21, which is convenient for carrying operations and can be suitable for bearings of different specifications, thereby improving reliability in use.

[0047] Specifically, by providing a grip portion 11 on the housing 1, the portability and ease of operation of the device are improved. In actual application scenarios, such as machine tool maintenance sites, the space is often small. Traditional desktop bearing heaters are not only large in size and require a fixed site, but also require an external power supply, which is extremely inconvenient to use. The handheld design of the present invention allows maintenance personnel to directly bring the device to the machine that needs maintenance, greatly improving work efficiency. Secondly, the heating component 2 adopts a structure of multiple heating units 21 evenly distributed along the circumference. This design not only ensures the uniformity of heating, but more importantly, realizes the function of adjustable diameter. In industrial sites, the bearing specifications used by machines of different models are often different. Traditional practices require the installation of multiple heaters of different specifications, which not only increases the equipment investment cost, but also increases the burden of carrying maintenance tools. The present invention uses a design in which each heating unit 21 can move radially, so that one device can adapt to bearings of various specifications, significantly reducing equipment cost and usage cost.

[0048] In one specific embodiment, the same device can be used to heat everything from small bearings to large wheel hub bearings in an auto repair shop, significantly improving equipment efficiency. Furthermore, the portability of the present invention is even more pronounced in field repair scenarios, such as on-site maintenance of construction machinery. Repair personnel can easily carry the device to any repair location, regardless of location or power supply constraints.

[0049] like Figure 8 As shown, in some embodiments, a first sliding structure 12 is radially provided on the shell 1; each heating unit 21 includes: a sliding bracket 211, the sliding bracket 211 slidingly cooperates with the first sliding structure 12; and a flexible heating belt 212, which is provided on the outer peripheral side of the sliding bracket 211.

[0050] In an embodiment of the present invention, the design of providing a first sliding structure 12 on the housing 1 provides a reliable guiding mechanism for the radial movement of the heating unit 21. When the equipment is used for a long time, if there is no reliable guiding mechanism, the heating unit 21 is prone to shaking or offset, affecting the heating effect. The first sliding structure 12 of the present invention ensures that the heating unit 21 always maintains precise radial movement and can maintain stability even in harsh working environments. The sliding matching design of the sliding bracket 211 and the first sliding structure 12 not only ensures the smoothness of the movement, but also provides sufficient support strength. In actual applications, for example, when the heating component 2 contacts the inner ring of the bearing, a certain radial force will be generated. If the support strength is insufficient, the heating unit 21 may be deformed or damaged. The sliding bracket 211 structure of the present invention has sufficient strength to withstand various stresses during normal use. In addition, the design of the flexible heating belt 212 being arranged on the outer peripheral side of the sliding bracket 211 solves the problem of heating uniformity.

[0051] Traditional induction heating methods suffer from low heat transfer efficiency due to the air gap between the heating coil and the bearing. However, the flexible heating tape 212 of the present invention can be directly applied to the inner surface of the bearing ring, significantly improving heat transfer efficiency. For example, during the installation of precision instrument bearings, precise temperature control is crucial. The present design ensures uniform heating of the bearing, preventing deformation caused by localized overheating.

[0052] Specifically, the first sliding structure 12 is a strip-shaped hole, and the sliding bracket 211 is provided with a sliding block that passes through the strip-shaped hole. The sliding block is a long strip structure that slides with the strip-shaped hole to ensure the sliding stability of the sliding bracket 211. A stopper is provided at the end of the sliding block. The stopper is located within the housing 1 and abuts against the inner surface of the housing 1 to provide a position limit.

[0053] like Figure 10As shown, in a preferred embodiment, the flexible heating belt 212 adopts a multi-layer composite structure, including a heat-conducting layer 2121 and a heat-generating layer 2122. A special wavy heat-conducting interface is provided between the heat-conducting layer 2121 and the heat-generating layer 2122, and this heat-conducting interface adopts a double-layer corrugated structure. Specifically, the double-layer corrugated structure includes a large corrugated layer and a small corrugated layer. The large corrugated layer has a height difference between the peak and trough of the wave, which is 0.8-1mm, and a wave pitch of 2.5-3mm; the small corrugated layer has a height difference between the peak and trough of the wave, which is 0.3-0.5mm, and a wave pitch of 1-1.5mm. More specifically, the small corrugated layer is arranged at the trough of the large corrugated layer, forming a composite corrugated structure. This double-layer corrugated structure significantly increases the contact area between the heat-conducting layer 2121 and the heat-generating layer 2122, provides multi-scale heat exchange channels, and effectively improves heat conduction efficiency.

[0054] like Figure 11 As shown, the structure of the heat-conducting layer 2121 is further optimized to include multiple independent heat-conducting units 21211, each of which has a hexagonal structure. Preferably, the side length of each heat-conducting unit 21211 is 3-5 mm. Flexible connecting strips 21212 are provided between adjacent heat-conducting units 21211, with a width of 0.5-1 mm. This structure of separate hexagonal heat-conducting units 21211 not only ensures the overall thermal conductivity of the heat-conducting layer 2121 but also provides excellent flexible deformation, allowing the heating strip to better conform to the surface of the bearing inner ring.

[0055] In some embodiments, the heating device further includes a driving mechanism 3 for driving multiple sliding brackets 211 to move synchronously. A driving portion 2111 is provided at one end of the sliding bracket 211 facing the center of the heating component 2, and the driving mechanism 3 is connected to the driving portion 2111.

[0056] like Figure 3-4 As shown, in the present invention, by providing a driving portion 2111 on the sliding bracket 211 and realizing synchronous movement of multiple sliding brackets 211 through the driving mechanism 3, the operation is simple and the adjustment accuracy of multiple heating units 21 can be guaranteed, thereby ensuring the uniformity of heating.

[0057] In actual applications, when batch processing of bearings of different specifications is required on the production line, traditional equipment requires repeated adjustment of each heating unit 21, which is not only time-consuming but also prone to errors. The present invention only requires the operation of one drive mechanism 3 to accurately adjust the position of all heating units 21 at the same time, greatly improving work efficiency. At the same time, the synchronous movement feature ensures that the heating component 2 always maintains a perfect circle, which is particularly important for the heating of precision bearings. Because during the heating process of the bearing, if the heating is uneven, it may cause stress deformation of the bearing, affecting the installation accuracy and service life. In addition, in some special working environments, such as when operating with thick gloves, the traditional separate adjustment method will be very difficult, while the synchronous drive design of the present invention makes the operation simple and reliable.

[0058] like Figure 3 As shown, in a specific embodiment, the driving mechanism 3 includes: a threaded tube 31, which is rotatably connected to the shell 1; a threaded rod 32, which is threadedly connected to the threaded tube 31; and a driving block 33, which is arranged at one end of the threaded rod 32; wherein the driving block 33 is circumferentially provided with a plurality of wedge surfaces 331 that slide with the driving portion 2111.

[0059] In the present invention, the threaded tube 31 and threaded rod 32 cooperate to form a precise motion control mechanism. In industrial field applications, bearing specifications can vary greatly, with inner diameters ranging from a few millimeters to hundreds of millimeters. Conventional quick-adjustment mechanisms struggle to balance adjustment accuracy and range. However, by selecting the appropriate pitch, a threaded drive mechanism can achieve a perfect balance of wide-range adjustment and precise control. For example, when repairing precision instruments, the diameter of the heating assembly 2 may need to be precisely adjusted to a specific size. The self-locking properties and precise adjustment capabilities of a threaded drive are particularly important. Secondly, the wedge surface 331 on the drive block 33 solves the problem of motion conversion. In practical applications, relying solely on a threaded drive to achieve radial motion can be complex and costly. However, converting axial motion into radial motion using the wedge surface 331 not only simplifies the structure but also provides additional mechanical advantages. For example, when handling large bearings, a large radial force is required to ensure close contact between the heating unit 21 and the bearing inner ring. The mechanical advantage of the wedge surface 331 converts the operator's relatively small input force into a larger radial force, significantly reducing operational difficulty. In addition, the reliability of this motion conversion mechanism is also very high, and it can maintain stable motion characteristics even in harsh working environments (such as dust, oil, etc.).

[0060] Specifically, multiple wedge surfaces 331 are arranged along the circumferential direction, and the multiple wedge surfaces 331 respectively slide with the driving parts 2111 of the multiple sliding brackets 211, converting the axial movement of the driving block 33 into the radial sliding of the multiple sliding brackets 211, and can prevent the threaded rod 32 from rotating, thereby ensuring the accuracy and reliability of the adjustment.

[0061] In some embodiments, a T-slot or a dovetail slot is provided on the wedge-shaped surface 331 , and the driving portion 2111 is provided with a slider 2112 that slidably cooperates with the T-slot or the dovetail slot.

[0062] In this invention, the precise fit between the T-slot or dovetail groove and the slider 2112 improves the reliability and service life of the device. In industrial applications, the reliability of the guide structure directly affects the performance and lifespan of the equipment. Traditional simple sliding structures are prone to wear, resulting in increased clearance and affecting adjustment accuracy. The T-slot or dovetail groove design offers multiple advantages: This structure can withstand both radial and lateral forces, ensuring stable movement. For example, during on-site maintenance, the operator may not apply force in the correct direction, generating certain lateral forces. The T-slot or dovetail groove structure effectively prevents the driving portion 2111 from deflecting or getting stuck. This structure is self-aligning, maintaining good guidance even after wear and tear from long-term use. Bearing heaters may be frequently used during routine maintenance in large factories, making equipment durability particularly important. The T-slot or dovetail groove design also provides dust and dirt protection, preventing accumulation of dirt that could affect movement in dusty environments. For example, in environments such as cement plants and mines, this enclosed guide structure effectively protects sliding components and extends the service life of the equipment.

[0063] like Figure 7 As shown, in some embodiments, the threaded tube 31 and the shell 1 can slide axially; the heating device also includes a spring 4, and a limiting ring 34 is provided on the outer periphery of the threaded tube 31, one end of the spring 4 abuts against the limiting ring 34, and the other end abuts against the shell 1.

[0064] In the prior art, inserting the heating element 2 into the bearing inner ring is a critical step. Traditional equipment often requires the operator to manually adjust the diameter of the heating element 2, a process that is not only time-consuming but also prone to damage. The present invention creatively solves this problem by allowing the threaded tube 31 to slide axially and combining it with the spring 4 to provide a return force.

[0065] Specifically, when inserting the bearing, the operator only needs to gently pull the threaded tube 31, and the heating component 2 will automatically shrink to the appropriate diameter. After insertion, release it, and the return force of the spring 4 will cause the heating component 2 to automatically expand and fit the inner ring of the bearing. When installing bearings in batches on the production line, this quick plug-in and pull-out function can greatly improve work efficiency. Secondly, when working in a small space, such as at an equipment maintenance site, where vision is often limited, this automatic contraction and expansion function can greatly reduce the difficulty of operation. Thirdly, the design of the spring 4 force also plays a protective role, preventing excessive contact force between the heating component 2 and the bearing. Especially during the heating process of precision bearings, this flexible contact method can effectively prevent scratches on the inner ring of the bearing.

[0066] In some embodiments, the outer periphery of the sliding bracket 211 is provided with an arcuate surface, on which an arcuate mounting groove 2113 for accommodating the flexible heating belt 212 is provided, and an insertion guide surface 2114 is provided at one end of the arcuate surface away from the housing 1 .

[0067] The present invention utilizes a carefully designed curved structure to enhance heating efficiency and safety. In practice, the bearing inner ring is a precision-machined cylindrical surface. If the heating surface doesn't conform well to it, heating efficiency will be compromised and localized overheating may occur. The curved surface design of the present invention cleverly addresses this issue by precisely matching the curvature of the bearing inner ring, ensuring maximum contact area. For example, during the heating process of a precision machine tool spindle bearing, temperature uniformity directly impacts the bearing's installation accuracy and service life. The curved surface design ensures uniform heat transfer to the bearing inner ring. The curved mounting groove 2113 not only provides a secure mounting position for the flexible heating belt 212 but also provides protection. In harsh working environments, such as machining workshops, the heating belt may come into contact with various oils, dirt, and debris. The curved mounting groove 2113 effectively prevents these contaminants from impacting the heating effect. Particularly noteworthy is the insertion guide surface 2114, located at the end of the housing 1, which is located away from the curved surface. This seemingly simple design plays a significant role in practical use. In low-light maintenance environments, operators often rely on touch to locate the bearing. Insertion guide surface 2114 helps operators accurately locate the correct insertion angle, preventing damage caused by forced insertion. Furthermore, in situations where rapid bearing replacement is necessary, such as production line maintenance, this guide design significantly improves operational efficiency and reduces the probability of error.

[0068] Specifically, when heating bearings of different specifications, the central angle of the arc surface remains unchanged, while the central angle relative to the arc surface changes after the diameter of the bearing changes. By adopting the flexible heating belt 212, the above-mentioned arc deviation can be effectively compensated, ensuring that the flexible heating belt 212 can fully fit with the inner rings of bearings of different specifications to achieve uniform heating.

[0069] like Figure 9 As shown, in some embodiments, a thermally conductive silicone rubber 5 is provided between two adjacent flexible heating belts 212 , and both ends of the thermally conductive silicone rubber 5 are respectively connected to the flexible heating belts 212 or the sliding bracket 211 .

[0070] The thermally conductive silicone rubber 5 filling design proposed in this embodiment of the present invention addresses the problem of heating blind spots. In practice, when the heating assembly 2 is adjusted to a larger diameter, gaps may form between adjacent flexible heating strips 212. These gaps create heating blind spots, leading to uneven heat transfer. By placing the thermally conductive silicone rubber 5 between adjacent flexible heating strips 212, this invention provides a simple and effective solution. First, the thermally conductive silicone rubber 5 has excellent thermal conductivity, effectively filling the gaps between the heating strips and ensuring uniform heat transfer. For example, when heating a large bearing, even when the heating assembly 2 is expanded to its maximum diameter, the thermally conductive silicone rubber 5 ensures a uniform temperature across the bearing's inner ring. Second, the thermally conductive silicone rubber 5's flexibility allows it to adapt to varying degrees of stretching, maintaining a good filling effect even when the diameter of the heating assembly 2 changes. This is particularly important in practice, as the same equipment may need to process bearings of varying sizes. The presence of the thermally conductive silicone rubber 5 ensures stable heating under all operating conditions. Third, the connection design between the thermally conductive silicone rubber 5 and the flexible heating strips 212 or sliding bracket 211 ensures the reliability of the entire system. For example, in a usage scenario where the size of the device is frequently adjusted, this connection method can prevent the thermal conductive silicone 5 from falling off or deforming, thereby extending the maintenance cycle of the device.

[0071] like Figure 12 As shown, in another preferred embodiment, a special honeycomb elastic support structure 52 is installed within the thermally conductive silicone rubber 5. This honeycomb structure adopts a variable diameter design: the honeycomb cells near the flexible heating zone 212 have a side length of 1.8-2mm and a depth of 2mm; the honeycomb cells away from the flexible heating zone 212 have a side length of 1-1.2mm and a depth of 1.5mm. A gradual transition zone of 1.5-2mm is provided between adjacent layers. This variable diameter design can better adapt to the stress requirements of different parts and improve the overall stability of the structure.

[0072] Furthermore, the cavity of the honeycomb elastic support structure 52 is filled with thermally conductive microspheres 53. These microspheres are made of aluminum nitride, have a diameter of 0.1-0.2 mm, and a fill rate of 30-40%. While maintaining structural flexibility, the microspheres 53 provide an additional heat conduction pathway, significantly improving thermal efficiency.

[0073] To prevent leakage of the thermally conductive microspheres 53 and improve sealing performance, a labyrinthine sealing structure is provided along the circumferential edge of the thermally conductive silicone rubber 5. This sealing structure consists of an outer layer and an inner layer. The outer layer is provided with three to four concentric annular protrusions with a height of 0.5-0.8 mm; the inner layer is provided with two to three wavy sealing edges with a peak height of 0.3-0.5 mm. This multi-layered labyrinthine sealing structure effectively prevents leakage of the thermally conductive microspheres 53 while maintaining the normal elastic deformation of the thermally conductive silicone rubber 5.

[0074] The above structural design forms a complete heat conduction optimization system: the wavy heat conduction interface provides the primary heat conduction channel; the separated hexagonal heat conduction units 21211 ensure the structure's flexible adaptability; the variable-diameter honeycomb structure provides stable mechanical support; the thermally conductive microspheres 53 filler enhance overall thermal conductivity; and the labyrinthine sealing structure ensures system reliability. These various structural elements work together to achieve efficient and uniform heating.

[0075] In some embodiments, the thermally conductive silicone rubber 5 is in a strip shape, and a curved protrusion 51 is provided on a surface of the thermally conductive silicone rubber 5 away from the driving portion 2111 .

[0076] The embodiments of the present invention optimize the specific shape of the thermally conductive silicone rubber 5, further enhancing the heating effect. The combination of the strip design and the curved raised portion 51 not only solves the heat conduction problem but also provides additional technical advantages. First, the strip design gives the thermally conductive silicone rubber 5 excellent elastic deformation, enabling adaptive adjustment as the diameter of the heating assembly 2 changes. This characteristic is very important in practical applications. For example, when continuously heating bearings of different sizes, the thermally conductive silicone rubber 5 can automatically adjust its length as the heating assembly 2 expands and contracts, maintaining excellent heat conduction. Second, the curved raised portion 51 is provided on the side of the thermally conductive silicone rubber 5 facing away from the driving portion 2111. As the diameter of the heating assembly 2 increases, conventional flat thermally conductive silicone rubber 5 may experience poor contact with the bearing inner ring. The presence of the curved raised portion 51 ensures sufficient contact pressure, thereby improving heat transfer efficiency. For example, in precision bearing assembly, temperature uniformity directly affects assembly quality. The curved raised portion 51 ensures optimal contact between the thermally conductive silicone rubber 5 and the bearing inner ring. In addition, this structural design also has a self-cleaning effect, which can prevent the accumulation of dust and impurities during use and extend the maintenance cycle of the equipment.

[0077] like Figure 7 As shown, in some embodiments, a pressure switch 13 is provided on the housing 1 , and the pressure switch 13 abuts against the limiting ring 34 and is electrically connected to the flexible heating belt 212 .

[0078] In this invention, the control design of the pressure switch 13 reflects in-depth consideration of equipment safety. In practical applications, the safe use of bearing heaters is directly related to the operator's personal safety and the reliability of the equipment. Traditional equipment often requires the operator to manually control the heating power supply, which not only increases the number of steps required but also poses a safety hazard. The present invention effectively solves this problem by providing a pressure switch 13 on the housing 1 and cooperating with a retaining ring 34 to achieve automatic control. First, this design automates heating control. When the bearing needs to be inserted or removed, pulling the threaded tube 31 automatically triggers the pressure switch 13, shutting off the heating power supply and avoiding the risk of burns. For example, when performing continuous bearing installation on a production line, the operator does not need to pay special attention to the power switch and can focus on the bearing installation operation, greatly improving work efficiency and safety. Second, the combination of the pressure switch 13 and the retaining ring 34 also provides a reliable mechanical linkage, ensuring safe disconnection even in the event of an electrical system failure. This is particularly important in certain special working environments, such as those with high humidity or the presence of conductive dust. Finally, this design also has an anti-misoperation function. Even if the operator forgets to turn off the heating power, the system can automatically enter a safe state. This is of great significance for reducing the risk of accidents and protecting the safety of equipment and operators.

[0079] like Figure 5 As shown, in some embodiments, a battery 6 is provided in the shell 1, and the battery 6 is electrically connected to the flexible heating belt 212 to provide electrical energy for the flexible heating belt 212. A switch button 7 is provided on the surface of the shell 1, and the battery 6 is controlled by the switch button 7 to supply power to the flexible heating belt 212, wherein the pressure switch 13 automatically controls the power on and off of the flexible heating belt 212 after the switch button 7 is turned on.

[0080] The bearing heating device provided in an embodiment of the present invention is convenient for carrying and operation through the holding portion 11. When the bearing needs to be heated, multiple heating units 21 can be moved radially to adjust the diameter of the entire heating assembly 2, and thus it is suitable for bearing inner rings with different inner diameters. Then, the inner ring of the bearing can be heated by the heating surface of the heating unit 21. It is convenient for carrying and operation, and can be suitable for bearings of different specifications, thereby improving reliability in use.

[0081] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an", and "" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain", and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0082] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0083] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A bearing heating device, characterized in that: include: a housing, wherein a grip portion is provided on the housing; A heating assembly is arranged on one side of the shell, and the heating assembly includes a plurality of heating units uniformly distributed along the circumference. Each of the heating units can move radially, and the outer surface of each heating unit constitutes a heating surface for abutting the inner ring of the bearing.

2. The bearing heating device according to claim 1, characterized in that: The housing is provided with a first sliding structure in a radial direction; each of the heating units comprises: a sliding bracket, wherein the sliding bracket is slidably engaged with the first sliding structure; The flexible heating belt is arranged on the outer peripheral side of the sliding bracket.

3. The bearing heating device according to claim 2, characterized in that: The heating device further comprises a driving mechanism for driving the plurality of sliding brackets to move synchronously, a driving portion is provided at one end of the sliding bracket facing the center of the heating assembly, and the driving mechanism is connected to the driving portion.

4. The bearing heating device according to claim 3, characterized in that: The driving mechanism comprises: a threaded tube, rotatably connected to the housing; A threaded rod, threadedly connected to the threaded pipe; A driving block is provided at one end of the threaded rod; Wherein, the driving block is provided with a plurality of wedge-shaped surfaces along the circumferential direction for sliding cooperation with the driving portion.

5. The bearing heating device according to claim 4, characterized in that: The wedge-shaped surface is provided with a T-shaped slot or a dovetail slot, and the driving portion is provided with a slider that is slidably matched with the T-shaped slot or the dovetail slot.

6. The bearing heating device according to claim 4, characterized in that: The threaded tube and the shell can slide in the axial direction; the heating device also includes a spring, a limiting ring is provided on the outer periphery of the threaded tube, one end of the spring abuts against the limiting ring, and the other end abuts against the shell.

7. The bearing heating device according to claim 3, characterized in that: The outer periphery of the sliding bracket is provided with an arc-shaped surface, the arc-shaped installation groove for accommodating the flexible heating belt is provided on the arc-shaped surface, and an insertion guide surface is provided on one end of the arc-shaped surface away from the shell.

8. The bearing heating device according to claim 7, characterized in that: Thermally conductive silica gel is provided between two adjacent flexible heating belts, and both ends of the thermally conductive silica gel are respectively connected to the flexible heating belts or the sliding brackets.

9. The bearing heating device according to claim 8, characterized in that: The thermally conductive silicone is in a strip shape, and an arc-shaped protrusion is provided on a side of the thermally conductive silicone away from the driving part.

10. The bearing heating device according to claim 6, characterized in that: A pressure switch is provided on the shell, and the pressure switch abuts against the limit ring and is electrically connected to the flexible heating belt.

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