An electric constant temperature drying oven for heating and installing bearings

Abstract

This invention relates to the field of drying and heating equipment technology, specifically to an electric constant-temperature drying oven for bearing heating and installation, comprising a rotary drying oven, a bearing support, a circulating heating device, a pushing assembly, and a bearing placement rack. The rotary drying oven has an internal installation space. The bearing support is installed inside the rotary drying oven and is detachably connected to it, serving to limit the placement of the bearing. The circulating heating device is installed inside the rotary drying oven and is used to circulate and guide the heating airflow. The pushing assembly is fixedly installed inside the rotary drying oven, with its pushing end used to push the supporting end of the bearing support upwards. The bearing placement rack is fixedly installed on the outside of the rotary drying oven. This invention improves the equipment's constant temperature stability and energy utilization efficiency, while also improving the efficiency and quality of the assembly process.

Description

Technical Field

[0001] This invention relates to the field of drying and heating equipment technology, specifically to an electric constant temperature drying oven for heating and mounting bearings. Background Technology

[0002] As a core component in mechanical transmission, bearings are often installed using an interference fit. To reduce installation difficulty and avoid mechanical damage caused by rigid assembly, the industry commonly uses electric thermostatic drying ovens to preheat bearings. This utilizes the thermal expansion properties of metals to increase the inner diameter of the bearing, achieving precise and efficient assembly. Electric thermostatic drying ovens, with their ability to heat in batches and control the temperature, have become commonly used equipment in bearing heating and installation processes, and are therefore widely applied in various industries involving bearing installation, such as machinery manufacturing, automotive assembly, and heavy metallurgy.

[0003] Chinese Patent No. CN213599692U discloses an electrically heated constant-temperature drying oven, comprising a drying oven body and a lid. A fan box is fixedly connected to the inner top wall of the drying oven body, and a fan frame is fixedly connected to the inner side wall of the fan box. A motor is fixedly installed on one side of the fan frame, and fan blades are fixedly connected to the output end of the motor. An exhaust duct and an outlet duct are fixedly connected to both sides of the fan box, respectively. A flow guide baffle is horizontally fixedly connected to the inner wall of the drying oven body. A temperature sensor, a controller, and an electrical box are fixedly installed at the top of the drying oven body. This device allows heat to circulate throughout the drying oven body via the fan blades, exhaust duct, and outlet duct, thereby achieving more even and thorough drying of the items. Furthermore, the temperature sensor, controller, and heating element allow for better monitoring and control of the internal temperature of the drying oven body, achieving a constant temperature.

[0004] While existing electric heating constant temperature drying ovens can achieve heat circulation and constant temperature control within the oven, meeting the requirements for uniform and batch heating of bearings, there are still many compatibility issues when applying them to the actual process of bearing heating and installation. They are difficult to meet the process requirements of immediate installation after bearing heating. The specific problems are as follows:

[0005] 1. Most existing constant temperature drying ovens are integral single-door structures without dedicated small-diameter access channels or compartmentalized access structures. During the installation process after the bearings are heated, operators must fully open the main door of the drying oven each time they take out a single or several sets of bearings. The high-temperature hot air inside the oven will quickly escape, while cold air from the outside will simultaneously enter the oven. This not only causes a large amount of heat loss and significantly increases the energy consumption for subsequent heating, but also directly disrupts the constant temperature thermal balance inside the oven, causing a sudden drop in temperature. The heating elements must continue to work to restore the set constant temperature, which seriously reduces the constant temperature efficiency and heating continuity of the equipment and affects the heating effect of the bearings.

[0006] 2. Existing constant temperature drying ovens can only achieve a constant temperature environment inside the oven. They are not equipped with insulation and protection or temporary constant temperature structures after the bearings are removed. Since bearings are metal components, they have a fast heat conduction and radiation rate. If the bearings are removed from the drying oven too early due to installation process issues, they will quickly exchange heat with room temperature air after leaving the constant temperature environment. The temperature will drop rapidly over time, resulting in insufficient expansion of the bearing's inner bore. This will not only cause difficulties in bearing installation and reduced assembly accuracy, but may even scratch the bearing's inner bore or the surface of the shaft during installation, affecting the transmission accuracy and service life of the bearing and the whole machine. Summary of the Invention

[0007] To address the aforementioned issues, an electric heating constant temperature drying oven for bearing heating and installation is provided. This invention improves the equipment's constant temperature stability and energy utilization efficiency, while also enhancing the efficiency and quality of the assembly process.

[0008] To address the problems of existing technologies, this invention provides an electric thermostatic drying oven for bearing heating and installation, comprising a rotary drying oven, a bearing support, a circulating heating device, a pushing assembly, and a bearing placement rack; the rotary drying oven has an internal installation space; the bearing support is installed inside the rotary drying oven and is detachably connected to the rotary drying oven, serving to limit the placement of the bearing; the circulating heating device is installed inside the rotary drying oven and is used to circulate and guide the heating airflow; the pushing assembly is fixedly installed inside the rotary drying oven, and its pushing end is used to push the supporting end of the bearing support to rise; the bearing placement rack is fixedly installed on the outside of the rotary drying oven.

[0009] Preferably, a limiting cover is rotatably installed on the top of the rotary drying oven, and the top of the limiting cover is provided with an opening. A rotary driver is also installed inside the rotary drying oven, and a rotary clamp connector is installed at the output end of the rotary driver.

[0010] Preferably, the bearing support has a mounting hole at its axial center and multiple storage holes on the bearing support. The multiple storage holes are evenly distributed around the mounting hole as the axis. Each storage hole has a limit clamp installed inside it. The limit clamp is used to clamp and fix the bearing. A spring is installed between the limit clamp and the storage hole.

[0011] Preferably, the limiting card connector is provided with multiple elastic pressing brackets, the surface of the elastic pressing brackets is provided with an anti-slip coating, and each elastic pressing bracket is also provided with an unlocking buckle on its inner side.

[0012] Preferably, the circulating heating device includes a heat equalization circulation guide component and an adaptive heating device; the heat equalization circulation guide component is installed inside the rotary drying chamber; the adaptive heating device is installed inside the rotary drying chamber, and both the output end and the input end of the adaptive heating device are connected to the heat equalization circulation guide component.

[0013] Preferably, the heat distribution circulation guide assembly includes air guide hoppers and circulation connecting pipes; multiple air guide hoppers are provided and are evenly distributed on the upper and lower sides of the bearing support; multiple circulation connecting pipes are provided, with one circulation connecting pipe between each pair of adjacent air guide hoppers.

[0014] Preferably, the heating device includes a blower, a heater, a temperature detector, and an air filter layer; the blower is fixedly installed inside the rotary drying chamber, the output end of the blower is connected to the input end of the heat-spreading circulation guide assembly, and the input end of the blower is connected to the output end of the heat-spreading circulation guide assembly; the heater is located at the output end of the blower; the temperature detector is fixedly installed at the input end of the blower; the air filter layer is installed at the input end of the blower, and the air filter layer is detachably connected to the blower.

[0015] Preferably, the push assembly includes a linear driver and a push base; the linear driver is fixedly installed inside the rotary drying chamber; the push base is fixedly installed at the output end of the linear driver, and the push base is provided with multiple unlocking push rods, the number of unlocking push rods corresponding to the number of unlocking buckles.

[0016] Preferably, the bearing placement rack includes a support bracket and storage rods; the support bracket is fixedly installed on the side of the rotary drying oven and has multiple insertion holes; multiple storage rods are provided and distributed on the insertion holes, and the storage rods are used to store bearings.

[0017] Preferably, the storage rod is provided with multiple limiting slide rails on its outer side, and an expansion bar is slidably installed in each limiting slide rail. An adjusting slider is slidably installed inside the storage rod, and a connecting rod is installed between the adjusting slider and the expansion bar. An adjusting screw is also installed at the axial position of the storage rod, and the adjusting screw is threadedly connected to the adjusting slider.

[0018] The advantages of this invention compared to the prior art are:

[0019] 1. This invention effectively solves the technical problems of severe heat loss and low temperature control efficiency when handling bearings in existing electric heating constant temperature drying ovens, significantly improving the equipment's temperature stability and energy utilization efficiency. Through the coordinated operation of the rotary drying oven and the top-pushing assembly, a bearing handling mode is constructed that does not require the full opening of the main structure of the oven. After the bearing is heated to the preset temperature, the rotary drying oven can drive the bearing support to rotate, transferring the qualified bearing to the preset discharge area. Then, the top-pushing assembly pushes the bearing support end to rise, allowing the bearing to be removed from the heating environment inside the oven for quick handling by the operator. The entire process does not require opening the main body of the drying oven. This structural design avoids the leakage of high-temperature hot air and the intrusion of external cold air caused by opening the main cover door when picking up and placing bearings in existing equipment. It effectively maintains the constant temperature thermal balance inside the rotary drying oven, reduces heat loss, and lowers the energy consumption for subsequent heating. At the same time, it avoids sudden temperature drops inside the oven and can maintain the set constant temperature without the heating element working continuously at high load. This improves the equipment's constant temperature efficiency and heating continuity, ensuring that the bearings to be heated are always in a stable constant temperature heating environment, ensuring the uniformity of bearing heating, and ensuring that the thermal expansion of the bearing's inner hole meets the interference fit assembly requirements.

[0020] 2. This invention achieves efficient integration of bearing heating and immediate assembly, effectively solving the problems of insufficient assembly accuracy caused by the lack of insulation and protection structures after bearing removal and the rapid temperature drop of bearings in existing equipment. This ensures the quality of bearing assembly and the stability of the entire machine's transmission. Through the bearing placement rack and a continuous cycle of "material retrieval, replenishment, and heating," seamless integration of bearing heating and assembly processes is achieved. Workers can pre-place the bearings to be heated on the bearing placement rack for later use. After a single qualified bearing is removed and assembled, an unheated bearing can be immediately retrieved from the bearing placement rack for replenishment. The resetting of the push-pull assembly and the rotation of the rotary drying chamber allow the newly replenished bearing to quickly enter the constant-temperature heating environment, ensuring continuous bearing heating and avoiding interruptions in the assembly process. Meanwhile, the bearing can be quickly assembled after being removed from the housing, significantly shortening the time the bearing is out of the constant temperature environment, reducing heat exchange between the bearing and room temperature air, effectively slowing down the rate of temperature drop of the bearing, ensuring that the inner bore of the bearing maintains sufficient expansion, meeting the installation requirements of interference fit, avoiding problems such as installation difficulties and reduced assembly accuracy caused by the drop in bearing temperature, preventing scratches on the inner bore of the bearing and the surface of the shaft, improving the transmission accuracy of the bearing and the whole machine, extending the service life of the bearing and the whole machine, adapting to the process requirements of immediate installation after the bearing is heated, and improving the overall efficiency and quality of the assembly process. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of an electric constant-temperature drying oven for bearing heating and installation according to the present invention. Figure 1 .

[0022] Figure 2This is a front view of an electric heating constant temperature drying oven for bearing heating and installation according to the present invention.

[0023] Figure 3 yes Figure 2 Planar sectional view at section AA.

[0024] Figure 4 yes Figure 3 A three-dimensional schematic diagram.

[0025] Figure 5 yes Figure 4 A magnified view of a section at point B.

[0026] Figure 6 This is a three-dimensional schematic diagram of a bearing support in an electric heating constant temperature drying oven for bearing heating installation according to the present invention.

[0027] Figure 7 This is a three-dimensional schematic diagram of a limit clamp in an electric heating constant temperature drying oven for bearing heating installation according to the present invention.

[0028] Figure 8 This is a three-dimensional schematic diagram of an electric constant-temperature drying oven for bearing heating and installation according to the present invention. Figure 2 .

[0029] Figure 9 This is a front view of the storage rod in an electric heating constant temperature drying oven for bearing heating installation according to the present invention.

[0030] Figure 10 yes Figure 9 Planar sectional view at section CC.

[0031] The numbers on the map are:

[0032] 1. Rotary drying oven; 11. Limiting cover plate; 111. Opening; 12. Rotary snap-fit ​​connector; 13. Rotary actuator; 2. Bearing support; 21. Storage hole; 22. Spring; 23. Limiting snap-fit ​​connector; 231. Elastic pressure frame; 232. Unlocking buckle; 3. Circulating heating device; 31. Heat equalization circulation guide assembly; 311. Air guide hopper; 312. Circulating connecting pipe; 32. Adaptive heating device; 321. Blower; 322. Heater; 323. Temperature detector; 4. Pushing assembly; 41. Linear actuator; 42. Pushing seat; 421. Unlocking push rod; 5. Bearing placement rack; 51. Support bracket; 52. Storage rod; 521. Limiting slide rail; 522. Expansion bar; 523. Adjusting slider; 524. Connecting rod; 525. Adjusting screw; 6. Bearing. Detailed Implementation

[0033] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] See Figures 1 to 10 As shown, an electric constant temperature drying oven for heating and installing bearings includes a rotary drying oven 1, a bearing support 2, a circulating heating device 3, a pushing assembly 4, and a bearing placement rack 5. The rotary drying oven 1 has an installation space inside. The bearing support 2 is installed inside the rotary drying oven 1 and is detachably connected to the rotary drying oven 1. The bearing support 2 is used to limit the placement of bearings 6. The circulating heating device 3 is installed inside the rotary drying oven 1 and is used to circulate and guide the heating airflow. The pushing assembly 4 is fixedly installed inside the rotary drying oven 1, and the pushing end of the pushing assembly 4 is used to push the supporting end of the bearing support 2 to rise. The bearing placement rack 5 is fixedly installed on the outside of the rotary drying oven 1.

[0035] Before starting the device, the staff will place the bearing 6 to be assembled on the bearing placement rack 5 for later use. According to the specifications of the bearing 6 to be heated, the appropriate bearing support 2 will be selected and the bearing support 2 will be installed in the internal installation space of the rotary drying oven 1 to ensure that the limiting structure of the bearing support 2 matches the shape of the bearing 6 and achieve stable placement of the bearing 6.

[0036] During the heating stage of bearing 6, the workers place the bearings 6 to be heated from the bearing placement rack 5 into the limiting positions of the bearing support 2 in sequence, and start the device after loading. The circulating heating device 3 is started, continuously generating a constant temperature heating airflow and circulating it to ensure that the heating airflow is evenly distributed inside the rotary drying chamber 1, so as to achieve batch, uniform and constant temperature heating of all the bearings 6 to be heated, and ensure that the inner hole of the bearing 6 reaches the dimensional requirements of interference fit due to thermal expansion.

[0037] During the bearing 6 placement and continuous heating stage, when the bearing 6 is heated to the preset temperature and meets the assembly requirements, the rotary drying chamber 1 drives the bearing support 2 to rotate, transferring one of the qualified heated bearings 6 to the preset discharge area and stopping rotation. At this time, the push assembly 4 is activated, its push end extends upward and acts on the corresponding support end of the bearing support 2, pushing the support end of the bearing support 2 to rise synchronously, so that the qualified heated bearing 6 is removed from the internal heating environment of the rotary drying chamber 1, making it easy for workers to quickly remove it from the bearing support 2 for immediate assembly.

[0038] After a single bearing 6 is removed for assembly, the worker takes the unheated bearing 6 from the bearing placement rack 5 and places it in the vacated limit position of the bearing support 2. Then, the pushing end of the pushing assembly 4 retracts, causing the supporting end of the bearing support 2 to descend and reset, allowing the newly placed unheated bearing 6 to enter the bearing support 2. The rotary drying oven 1 restarts its rotation, and the circulating heating device 3 continues to work, heating the newly placed bearing 6 at a constant temperature. At the same time, the remaining bearings 6 already in the oven continue to be kept at a constant temperature, thus forming a continuous cycle of "material removal, material replenishment, and heating," achieving continuous batch heating and immediate assembly of bearings 6, ensuring the continuity and accuracy of the assembly process.

[0039] See Figures 1 to 4 As shown, a limiting cover plate 11 is rotatably installed on the top of the rotary drying chamber 1. The top of the limiting cover plate 11 is provided with an opening 111. A rotary driver 13 is also installed inside the rotary drying chamber 1. A rotary clamp connector 12 is installed at the output end of the rotary driver 13.

[0040] The limiting cover 11, which is rotatably mounted on the top of the rotary drying oven 1, can be opened and closed around its rotation connection point. The opening 111 on its top is connected to the internal installation space, serving as a channel for the installation and removal of the bearing support 2 and the replenishment and removal of the bearing 6. At the same time, it can be closed during the heating process of the bearing 6 to reduce the leakage of constant temperature hot air from the oven, ensure the stability of the constant temperature environment inside the oven, and reduce heat loss.

[0041] The rotary drive 13, installed inside the rotary drying oven 1, serves as a power output component. Its output end is fixedly connected to the rotary clamp joint 12, which can stably transmit power to the rotary clamp joint 12. The rotary clamp joint 12 is used to achieve a detachable and fixed connection with the bearing support 2, ensuring that the bearing support 2 and the rotary clamp joint 12 rotate synchronously, thereby achieving precise positioning and stable rotation of the bearing support 2 within the installation space inside the rotary drying oven 1.

[0042] Before starting the device, the operator rotates and opens the limiting cover 11, and fixes the bearing support 2 of the appropriate specification to the rotating snap joint 12 through the top opening 111. After the installation of the bearing support 2 is completed, the limiting cover 11 is closed to ensure that a relatively sealed heating space is formed inside the rotary drying oven 1.

[0043] During the heating stage of bearing 6, the rotary driver 13 is started, driving the rotating clamp 12 to rotate at a constant speed, which in turn drives the bearing support 2 fixedly connected to it to rotate synchronously, so that all the bearings 6 to be heated placed on the bearing support 2 can pass evenly through the heating area inside the rotary drying oven 1. With the circulation and diversion effect of the circulating heating device 3, the batch, uniform and constant temperature heating of bearing 6 is achieved.

[0044] When the bearing 6 is heated to the preset temperature and meets the assembly requirements, the rotary driver 13 drives the rotating clamp joint 12 and the bearing support 2 to rotate, accurately transferring one of the heated bearing 6 to the opening 111 of the limiting cover plate 11, which corresponds to the pushing end position of the pushing assembly 4, providing accurate positioning for subsequent pushing and material removal; after the single bearing 6 is removed and the unheated bearing 6 is replaced, the rotary driver 13 is restarted, driving the bearing support 2 to resume rotation, continuously providing uniform heating conditions for the remaining bearing 6 and the newly replaced bearing 6, ensuring the continuity and accuracy of the entire heating and assembly process.

[0045] See Figures 3 to 6 As shown, the bearing support 2 has a mounting hole at its axial center and multiple storage holes 21. The multiple storage holes 21 are evenly distributed around the mounting hole. Each storage hole 21 has a limiting clip 23 slidably installed inside it. The limiting clip 23 is used to clamp and fix the bearing 6. A spring 22 is installed between the limiting clip 23 and the storage hole 21.

[0046] The mounting hole at the axial position of the bearing support 2 is adapted to the size of the rotating snap connector 12 at the output end of the rotary drive 13 inside the rotary drying oven 1. This is used to achieve precise docking and detachable fixed connection between the bearing support 2 and the rotating snap connector 12, ensuring that the bearing support 2 can rotate synchronously with the rotating snap connector 12.

[0047] Multiple storage holes 21 evenly distributed along the circumference of the bearing support 2 are arranged symmetrically with the mounting hole as the axis, providing dedicated installation space for the limit card connector 23 and spring 22. At the same time, they serve as the bearing support station for the bearing 6, enabling the batch placement of multiple bearings 6 and meeting the process requirements of batch heating of the device.

[0048] The limiting clamp 23, which is slidably assembled inside each storage hole 21, has the core function of clamping and fixing the bearing 6 placed in the storage hole 21. Its structure is adapted to the shape of the bearing 6, which can realize the precise positioning of the bearing 6 in the storage hole 21, prevent the bearing 6 from being displaced or falling off during the rotation of the bearing support 2, and ensure the stability of the heating process.

[0049] The spring 22 installed between the limit card connector 23 and the storage hole 21 can exert a continuous pushing force on the limit card connector 23 when it is in its natural state. This ensures that the limit card connector 23 is always retracted inside the storage hole 21 when it is not subjected to external force, thus preventing the limit card connector 23 from being exposed and affecting the placement of the bearing 6 and the rotation adjustment of the bearing support 2. At the same time, it ensures the structural stability of the bearing support 2 during rotation.

[0050] See Figures 6 to 7As shown, the limit card connector 23 is provided with multiple elastic pressure brackets 231. The surface of the elastic pressure brackets 231 is provided with an anti-slip coating, and each elastic pressure bracket 231 is also provided with an unlocking buckle 232 on its inner side.

[0051] Multiple elastic clamping brackets 231 integrated on the limiting clamping fixture 23 are arranged symmetrically. Their core function is to provide inner wall support and limiting clamping for the bearing 6 placed in the storage hole 21. In the assembled state, the elastic clamping brackets 231 are in a naturally extended state, with their outer walls tightly fitting against the inner wall of the bearing 6. They use their own elastic force to generate a uniform radial clamping force on the bearing 6, achieving precise positioning of the bearing 6 in the storage hole 21. This prevents the bearing 6 from axial displacement or circumferential detachment during the rotation and heating process of the bearing support 2, ensuring the stability of the heating process.

[0052] The anti-slip coating on the surface of the elastic support frame 231 can effectively increase the friction between the elastic support frame 231 and the inner wall of the bearing 6, further improving the stability of the bearing 6 clamping. At the same time, the anti-slip coating has good wear resistance and flexibility, which can prevent the elastic support frame 231 from directly rigidly contacting the inner wall of the bearing 6, preventing scratches, wear and other damage to the inner wall of the bearing 6, and ensuring the assembly accuracy and service life of the bearing 6.

[0053] The unlocking buckle 232 provided on the inner side of each elastic pressing frame 231 serves as the force application point of the pushing assembly 4 and is used to realize the unlocking action of the limit locking device 23 on the bearing 6.

[0054] See Figures 1 to 3 As shown, the circulating heating device 3 includes a heat equalization circulation guide component 31 and an adaptive heating device 32; the heat equalization circulation guide component 31 is installed inside the rotary drying chamber 1; the adaptive heating device 32 is installed inside the rotary drying chamber 1, and the output end and input end of the adaptive heating device 32 are both connected to the heat equalization circulation guide component 31.

[0055] The heat equalization circulation guide component 31 and the adaptive heating device 32 of the circulating heating device 3 are both fixedly installed in the internal installation space of the rotary drying oven 1. The output end and input end of the adaptive heating device 32 are sealed and connected to the heat equalization circulation guide component 31 to form a complete hot air circulation loop, ensuring that the hot air can flow stably and be recycled in the loop, reducing heat loss and improving heating efficiency.

[0056] The adaptive heating device 32 generates a constant-temperature hot airflow at a preset temperature, and recovers and reheats the hot airflow after circulation, realizing the recycling of thermal energy. After the device is started, the adaptive heating device 32 starts to operate and continuously generates a constant-temperature hot airflow that meets the heating process requirements of the bearing 6. The hot airflow is then transported to the heat equalization circulation guide component 31 through its output end.

[0057] The heat distribution circulation guide component 31 serves as a directional guide for the hot airflow. It is compatible with the internal space of the rotary drying oven 1 and the arrangement of the bearing support 2. It can evenly distribute and directionally guide the constant-temperature hot airflow delivered by the heating device 32, so that the hot airflow passes through each bearing 6 on the bearing support 2 in sequence according to the preset path. This ensures that the hot airflow is in full contact with each bearing 6, achieving batch, uniform, and constant-temperature heating of all bearings 6 to be heated. It ensures that the heating temperature of each bearing 6 is consistent and that the thermal expansion of the inner hole of the bearing 6 meets the assembly dimension requirements of the interference fit.

[0058] After the hot airflow completes heating of the bearing 6, it carries some heat along the return path of the heat distribution circulation guide assembly 31, and finally returns to the interior of the adaptive heating device 32 through the input end of the adaptive heating device 32. The adaptive heating device 32 detects the temperature of the returning hot airflow and performs supplementary heating, adjusting its temperature to a preset constant temperature standard, and then sends it back to the heat distribution circulation guide assembly 31 through the output end, forming a closed loop of hot airflow circulation of "generation-guidance-heating-recovery-supplementary heating-retransmission".

[0059] See Figure 3 and Figure 4 As shown, the heat dissipation circulation guide assembly 31 includes air guide hoppers 311 and circulation connecting pipes 312; multiple air guide hoppers 311 are provided and are evenly distributed on the upper and lower sides of the bearing support 2; multiple circulation connecting pipes 312 are provided, and a circulation connecting pipe 312 is provided between each pair of adjacent air guide hoppers 311.

[0060] Multiple air guide hoppers 311 of the heat distribution circulation guide assembly 31 are symmetrically and evenly distributed on the upper and lower sides of the bearing support 2, and each air guide hopper 311 corresponds one-to-one with the storage hole 21 on the bearing support 2, ensuring that each bearing 6 in each storage hole 21 can correspond to a set of upper and lower arranged air guide hoppers 311, providing structural guarantee for the accurate flow of hot air through the bearing 6; multiple circulation connecting pipes 312 are arranged in conjunction with the air guide hoppers 311, and a circulation connecting pipe 312 is installed between each pair of adjacent air guide hoppers 311. The two ends of the circulation connecting pipe 312 are respectively sealed and connected to the adjacent air guide hoppers 311 to realize the conduction of hot air between adjacent air guide hoppers 311 and construct a complete hot air circulation path.

[0061] The heat distribution circulation guide assembly 31 is sealed and connected to the adaptive heating device 32. It serves as a carrier for receiving, guiding, and returning hot airflow. It receives the constant-temperature hot airflow output by the adaptive heating device 32 and guides the heated hot airflow back to the adaptive heating device 32, forming a closed-loop hot airflow circulation with the adaptive heating device 32. After the device is started, when the adaptive heating device 32 generates a constant-temperature hot airflow at a preset temperature and delivers it to the heat distribution circulation guide assembly 31 through its output end, the hot airflow first enters the air guide hopper 311 at the bottom of the bearing support 2.

[0062] The bottom air guide 311 guides and organizes the input constant temperature hot airflow, precisely guiding the hot airflow to the corresponding bearing support 2 storage hole 21. As the hot airflow passes through the storage hole 21, it makes full contact with the bearing 6 that is fixed in the storage hole 21, achieving efficient constant temperature heating of the bearing 6 and ensuring that the inner hole of the bearing 6 reaches the dimensional requirements of interference fit due to thermal expansion.

[0063] After the bearing 6 has been heated, the hot airflow, carrying some residual heat, flows out from the upper air guide hopper 311 of the bearing support 2. The upper air guide hopper 311, through a connected circulation pipe 312, directs the outflowing hot airflow to the interior of an adjacent air guide hopper 311. The adjacent air guide hopper 311 then guides the received hot airflow to its corresponding storage hole 21 in the bearing support 2, heating the bearing 6 within that storage hole 21, thus circulating the process in sequence.

[0064] Through the above-described circulating flow process, the heat equalization circulation flow guide component 31 utilizes the precise guidance of the air guide hopper 311 and the communication and conduction effect of the circulation connecting pipe 312 to uniformly guide the constant temperature hot airflow to each storage hole 21 on the bearing support 2, so that each bearing 6 can be fully wrapped by the hot airflow and uniformly heated, ensuring the consistency of the heating temperature of each bearing 6; at the same time, the hot airflow after heating all bearings 6 has been completed flows back to the adaptive heating device 32 through the return path of the heat equalization circulation flow guide component 31 and the input end of the adaptive heating device 32, realizing the recycling and reuse of hot airflow, reducing heat loss, and improving the heating efficiency and energy saving of the device.

[0065] See Figures 3 to 8 As shown, the adaptive heating device 32 includes a blower 321, a heater 322, a temperature detector 323, and an air filter layer. The blower 321 is fixedly installed inside the rotary drying chamber 1, and the output end of the blower 321 is connected to the input end of the heat homogenization circulation guide assembly 31. The input end of the blower 321 is connected to the output end of the heat homogenization circulation guide assembly 31. The heater 322 is located at the output end of the blower 321. The temperature detector 323 is fixedly installed at the input end of the blower 321. The air filter layer is installed at the input end of the blower 321 and is detachably connected to the blower 321.

[0066] After the device is started, the blower 321 starts running first. As the power core of the airflow circulation, its input end continuously draws the airflow returning from the heat-spreading circulation guide component 31. At the same time, the drawn airflow is filtered through the air filter layer to intercept dust, impurities and other pollutants mixed in the airflow. This prevents pollutants from entering the heat-spreading circulation guide component 31 and the surface of the bearing 6 with the airflow, and prevents wear and blockage of the inner wall of the bearing 6 or the heating channel. This ensures the heating accuracy of the bearing 6 and the stability of the device operation. In addition, the air filter layer is designed to be detachable, which is convenient for later cleaning and replacement.

[0067] The airflow, filtered through the air filter layer, enters the blower 321, which powers the airflow to the heater 322 at its output end. The heater 322 starts and precisely heats the airflow delivered by the blower 321 according to the preset heating process temperature of the bearing 6, raising the airflow to the preset constant temperature standard and forming a constant temperature hot airflow that meets the heating requirements of the bearing 6. Then, through the connection structure between the output end of the blower 321 and the input end of the heat exchange circulation guide assembly 31, the constant temperature hot airflow is delivered to the heat exchange circulation guide assembly 31 to provide a heat source for heating the bearing 6.

[0068] The constant-temperature hot airflow is directed through the heat-spreading circulation guide component 31 to heat all bearings 6. After heating, it carries some residual heat and flows along the return path, finally returning to the input end of the blower 321 through the output end of the heat-spreading circulation guide component 31. At this time, the temperature detector 323 fixed to the input end of the blower 321 monitors the temperature of the return airflow in real time and feeds the temperature detection signal back to the device control system to achieve closed-loop temperature control.

[0069] The control system adaptively adjusts the heating power of the heater 322 based on the signal fed back by the temperature detector 323: when the temperature of the return airflow is lower than the preset constant temperature standard, the heater 322 increases the heating power to accelerate the heating rate of the airflow and ensure the stable temperature of the output hot airflow; when the temperature of the return airflow approaches or reaches the preset constant temperature standard, the heater 322 reduces the heating power to reduce energy consumption and achieve optimized control of heating energy consumption.

[0070] See Figures 3 to 5 As shown, the push assembly 4 includes a linear driver 41 and a push base 42; the linear driver 41 is fixedly installed inside the rotary drying chamber 1; the push base 42 is fixedly installed at the output end of the linear driver 41, and the push base 42 is provided with a plurality of unlocking push rods 421, the number of unlocking push rods 421 corresponding to the number of unlocking buckles 232.

[0071] When the bearing 6 is heated to the preset temperature to meet the assembly requirements, the rotating drying box 1 drives the bearing support 2 to rotate, and accurately transfers the limit clamp 23 containing the qualified bearing 6 to the top of the push assembly 4, so that the unlocking rod 421 on the push base 42 and the unlocking buckle 232 on the limit clamp 23 correspond one-to-one, completing the precise positioning of the push operation and preparing for subsequent unlocking and ejection.

[0072] When it is necessary to push and unlock the limit card holder 23, the linear driver 41 is activated, its output end extends and drives the push seat 42 to move upward along the axis. The push seat 42 simultaneously drives the multiple unlocking push rods 421 at the top to move upward, so that the unlocking push rods 421 are accurately inserted into the corresponding unlocking buckle 232 and axial pressure is applied.

[0073] The axial pressure applied by the unlocking rod 421 to the unlocking buckle 232 is transmitted to the elastic pressing frame 231 of the limiting clamp 23, causing multiple elastic pressing frames 231 to retract inward synchronously, releasing the radial clamping force of the elastic pressing frame 231 on the inner wall of the bearing 6, thereby unlocking the bearing 6 by the limiting clamp 23, eliminating the limiting resistance during the removal and placement of the bearing 6, and facilitating the quick removal of the bearing 6 by the staff for assembly.

[0074] After the limit card connector 23 is unlocked, the linear drive 41 continues to drive the push seat 42 to rise, and the unlocking push rod 421 continues to apply axial thrust to the unlocking buckle 232, thereby driving the limit card connector 23 to slide upward along the inner wall of the storage hole 21 of the bearing support 2, so that the unlocked bearing 6 rises synchronously with the limit card connector 23 until the bearing 6 disengages from the storage hole 21 and extends out of the opening 111 of the limit cover plate 11 of the rotary drying oven 1, providing convenient operating space for the staff to retrieve materials.

[0075] See Figure 1 and Figure 8 As shown, the bearing placement rack 5 includes a support bracket 51 and a storage rod 52; the support bracket 51 is fixedly installed on the side of the rotary drying oven 1, and the support bracket 51 is provided with multiple insertion holes; multiple storage rods 52 are provided, and the storage rods 52 are distributed on the insertion holes, and the storage rods 52 are used to store bearings 6.

[0076] The bearing placement rack 5's support bracket 51 is fixedly assembled to the side of the rotary drying chamber 1, maintaining relative fixation with the rotary drying chamber 1. Its core function is to limit and support the multiple storage rods 52 and arrange them in an orderly manner. The multiple insertion holes on the support bracket 51 correspond one-to-one with the number and size of the storage rods 52, providing precise insertion and positioning space for the storage rods 52. This ensures that the storage rods 52 are stable and reliable after assembly, preventing displacement or detachment of the storage rods 52 due to vibration during device operation, and ensuring the stability of the bearing 6 storage.

[0077] Multiple storage rods 52 are respectively inserted into the insertion holes of the support bracket 51 to form an orderly storage array of bearings 6. The structure of each storage rod 52 is adapted to the inner hole size of the bearing 6 to be heated, and multiple bearings 6 to be heated can be arranged axially to achieve layered and batch storage of bearings 6; at the same time, the storage rods 52 can play a preliminary limiting role for the bearings 6, preventing the bearings 6 from axially slipping or being piled up randomly during storage, and making it convenient for staff to quickly retrieve them.

[0078] See Figures 8 to 10As shown, the storage rod 52 is provided with multiple limiting slide rails 521 on its outer side, and an expansion bar 522 is slidably installed in each limiting slide rail 521. An adjusting slider 523 is slidably installed inside the storage rod 52. A connecting rod 524 is installed between the adjusting slider 523 and the expansion bar 522. An adjusting screw 525 is also installed at the axial position of the storage rod 52, and the adjusting screw 525 is threadedly connected to the adjusting slider 523.

[0079] When adjusting the compatibility of the storage rod 52 according to the specifications of the bearing 6 to be heated, the operator rotates the adjusting screw 525, which drives the adjusting slider 523 to move axially along the storage rod 52 by means of thread transmission. During the movement of the adjusting slider 523, it simultaneously pushes the connecting rod 524 hinged to it to move. The connecting rod 524 transmits the thrust to the corresponding expansion bar 522, which drives multiple expansion bars 522 to move radially synchronously along the limiting slide rail 521, thereby adjusting the extension length of the expansion bar 522.

[0080] When the expansion bar 522 is adjusted to match the inner hole size of the bearing 6 to be heated, stop rotating the adjusting screw 525. The adjusting slider 523 remains fixed under the self-locking action of the thread, and the expansion bar 522 maintains its current extended state. At this time, the bearing 6 to be heated is inserted and arranged axially along the storage rod 52. The outer side of the expansion bar 522 is tightly attached to the inner wall of the bearing 6, which provides stable support and limit for the bearing 6 and prevents the bearing 6 from being stacked randomly during storage.

[0081] When different specifications of bearings 6 need to be stored, the adjusting screw 525 can be rotated in the opposite direction to drive the adjusting slider 523 to move in the opposite direction. Then, the connecting rod 524 pulls the expansion bar 522 to retract radially along the limiting slide rail 521. The extension length of the expansion bar 522 is adjusted to match the inner hole size of the new specification bearing 6. This allows a single storage rod 52 to adapt to the storage of multiple specifications of bearings 6, improving the versatility and practicality of the bearing placement rack 5. At the same time, it ensures the standardization of bearing storage and facilitates the quick retrieval and replenishment of bearings 6 by staff.

[0082] Specific working principle:

[0083] The staff pre-places the bearing 6 to be assembled on the bearing placement rack 5 for later use. According to the specifications of the bearing 6 to be heated, a suitable bearing support 2 is selected and installed in the internal installation space of the rotary drying oven 1. The staff ensures that the limiting structure of the bearing support 2 matches the shape of the bearing 6, so as to achieve stable placement of the bearing 6.

[0084] During the heating stage of bearing 6, the workers place the bearings 6 to be heated from the bearing placement rack 5 into the limiting positions of the bearing support 2 in sequence, and start the device after loading. The circulating heating device 3 is started, continuously generating a constant temperature heating airflow and circulating it to ensure that the heating airflow is evenly distributed inside the rotary drying chamber 1, so as to achieve batch, uniform and constant temperature heating of all the bearings 6 to be heated, and ensure that the inner hole of the bearing 6 reaches the dimensional requirements of interference fit due to thermal expansion.

[0085] During the bearing 6 placement and continuous heating stage, when the bearing 6 is heated to the preset temperature and meets the assembly requirements, the rotary drying chamber 1 drives the bearing support 2 to rotate, transferring one of the qualified heated bearings 6 to the preset discharge area and stopping rotation. At this time, the push assembly 4 is activated, its push end extends upward and acts on the corresponding support end of the bearing support 2, pushing the support end of the bearing support 2 to rise synchronously, so that the qualified heated bearing 6 is removed from the internal heating environment of the rotary drying chamber 1, making it easy for workers to quickly remove it from the bearing support 2 for immediate assembly.

[0086] After a single bearing 6 is removed for assembly, the worker takes the unheated bearing 6 from the bearing placement rack 5 and places it in the vacated limit position of the bearing support 2. Then, the pushing end of the pushing assembly 4 retracts, causing the supporting end of the bearing support 2 to descend and reset, allowing the newly placed unheated bearing 6 to enter the bearing support 2. The rotary drying oven 1 restarts its rotation, and the circulating heating device 3 continues to work, heating the newly placed bearing 6 at a constant temperature. At the same time, the remaining bearings 6 already in the oven continue to be kept at a constant temperature, thus forming a continuous cycle of "material removal, material replenishment, and heating," achieving continuous batch heating and immediate assembly of bearings 6, ensuring the continuity and accuracy of the assembly process.

[0087] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An electric constant-temperature drying oven for heating and installing bearings, characterized in that, It includes a rotary drying oven (1), a bearing support (2), a circulating heating device (3), a push assembly (4), and a bearing placement rack (5); The rotary drying oven (1) has an internal installation space; The bearing support (2) is installed inside the rotary drying box (1). The bearing support (2) is detachably connected to the rotary drying box (1). The bearing support (2) is used to limit the placement of the bearing (6). The circulating heating device (3) is installed inside the rotary drying box (1) and is used to circulate and guide the heating airflow; The push assembly (4) is fixedly installed inside the rotary drying chamber (1), and the push end of the push assembly (4) is used to push the support end of the bearing support (2) to rise. The bearing mounting bracket (5) is fixedly installed on the outside of the rotary drying oven (1); A limiting cover plate (11) is rotatably installed on the top of the rotary drying oven (1). The top of the limiting cover plate (11) has an opening (111). A rotary driver (13) is also installed inside the rotary drying oven (1). A rotary clamp connector (12) is installed at the output end of the rotary driver (13). The bearing support (2) has a mounting hole at the axial position and multiple storage holes (21) on the bearing support (2). The multiple storage holes (21) are evenly distributed around the mounting hole. Each storage hole (21) has a limit clamp (23) slidably installed inside. The limit clamp (23) is used to clamp and fix the bearing (6). A spring (22) is installed between the limit clamp (23) and the storage hole (21). The limit card connector (23) is provided with multiple elastic pressure brackets (231), the surface of the elastic pressure brackets (231) is provided with an anti-slip coating, and each elastic pressure bracket (231) is also provided with an unlocking buckle (232) on its inner side. The push assembly (4) includes a linear driver (41) and a push base (42); The linear actuator (41) is fixedly installed inside the rotary drying oven (1); The push base (42) is fixedly installed at the output end of the linear driver (41). The push base (42) is provided with multiple unlocking push rods (421), and the number of unlocking push rods (421) corresponds to the number of unlocking buckles (232).

2. The electric constant temperature drying oven for bearing heating and installation according to claim 1, characterized in that, The circulating heating device (3) includes a heat equalization circulation guide assembly (31) and an adaptive heating device (32); The heat exchange circulation guide assembly (31) is installed inside the rotary drying chamber (1); The adaptive heating device (32) is installed inside the rotary drying oven (1), and the output and input ends of the adaptive heating device (32) are connected to the heat equalization circulation guide assembly (31).

3. The electric constant temperature drying oven for bearing heating and installation according to claim 2, characterized in that, The heat distribution circulation guide assembly (31) includes an air guide hopper (311) and a circulation connecting pipe (312). Multiple air guide hoppers (311) are provided and are evenly distributed on the upper and lower sides of the bearing support (2); Multiple circulation connection pipes (312) are provided, with one circulation connection pipe (312) between each pair of adjacent air guide hoppers (311).

4. The electric constant temperature drying oven for bearing heating and installation according to claim 2, characterized in that, The heating device (32) includes a blower (321), a heater (322), a temperature detector (323), and an air filter layer; The blower (321) is fixedly installed inside the rotary drying chamber (1). The output end of the blower (321) is connected to the input end of the heat exchange circulation guide assembly (31), and the input end of the blower (321) is connected to the output end of the heat exchange circulation guide assembly (31). The heater (322) is located at the output end of the blower (321); A temperature detector (323) is fixedly installed at the input end of the blower (321); An air filter layer is installed at the input end of the blower (321), and the air filter layer is detachably connected to the blower (321).

5. The electric constant temperature drying oven for bearing heating and installation according to claim 1, characterized in that, The bearing placement rack (5) includes a support bracket (51) and a storage rod (52). The support bracket (51) is fixedly installed on the side of the rotary drying oven (1), and the support bracket (51) is provided with multiple insertion holes; Multiple storage rods (52) are provided and distributed on the insertion hole. The storage rods (52) are used to store the bearing (6).

6. The electric constant temperature drying oven for bearing heating and installation according to claim 5, characterized in that, The storage rod (52) is provided with multiple limiting slide rails (521) on the outside. An expansion bar (522) is slidably installed in each limiting slide rail (521). An adjusting slider (523) is slidably installed inside the storage rod (52). A connecting rod (524) is installed between the adjusting slider (523) and the expansion bar (522). An adjusting screw (525) is also installed at the axial position of the storage rod (52). The adjusting screw (525) is threadedly connected to the adjusting slider (523).

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