Low-noise parallel-shaft helical gear speed reducer

Abstract

The invention discloses a low-noise parallel shaft helical gear speed reducer, and relates to the technical field of parallel shaft helical gear speed reducers, the low-noise parallel shaft helical gear speed reducer comprises a rear shell, the front side of the rear shell is fixedly connected with a front shell, the upper part of the rear shell is provided with an oil injection hole, the lower part of the rear shell is provided with an oil discharge hole, and the rear side of the rear shell is provided with an output motor; and the output end of the output motor is fixedly connected with a first rotating rod, the front end of the first rotating rod extends into the rear shell and the front shell, and the front end of the first rotating rod is rotationally connected with the outer wall of the front shell through a bearing. The vibration grade and output power data can be synchronously acquired in the device starting stage, then the mechanical transmission state can be rapidly judged, when the two parameters are out of the threshold range, abnormal early warning can be triggered, the early recognition capacity of the system to mechanical faults or load abnormity at the starting moment is improved, and the system reliability is improved. The method has the characteristics of high practicability and high-efficiency operation and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of parallel shaft helical gear reducers, and particularly to a low-noise parallel shaft helical gear reducer. Background Art

[0002] As a common power transmission device, the parallel shaft helical gear reducer is widely used in the fields of industrial automation, machinery manufacturing, and logistics equipment due to its advantages such as compact structure, high transmission efficiency, and strong load capacity. Its main function is to convert the output of a high-speed and low-torque motor into a low-speed and high-torque output form to meet the transmission requirements under various load conditions.

[0003] In actual applications, the operation of the parallel shaft helical gear reducer is usually accompanied by significant mechanical vibrations and noises, which not only affect the comfort of the operating environment but also reduce the operating stability and service life of the equipment to a certain extent. Especially under long-term continuous operation conditions, factors such as gear meshing clearances, lubrication state changes, and load fluctuations are likely to induce abnormal transmissions, thereby exacerbating the occurrence of noises and failures.

[0004] In response to the above problems, existing research has attempted to propose improvement solutions starting from structural design and noise reduction measures. For example, Chinese Patent No. CN113833825B discloses a noise-proof and sound-insulating parallel shaft helical gear reducer. By setting a positioning mechanism, the accurate meshing of the third helical gear and the fourth helical gear is achieved, which has the effect of avoiding noise generation. By setting a cleaning mechanism, the metal chips in the sound-insulating box are cleaned to prevent the metal chips from wearing the internal parts of the sound-insulating box, thereby avoiding the effect of causing device damage. This solution improves the noise reduction performance and structural reliability of the reducer to a certain extent. However, the above solution mainly focuses on physical sound insulation and the optimization of gear meshing accuracy, and does not perform real-time perception and analysis of the multi-dimensional operating conditions of the reducer during operation, lacking an intelligent recognition and early warning mechanism for fault symptoms, and unable to effectively avoid sudden failures caused by internal wear, insufficient lubrication, or abnormal external loads. At the same time, in terms of lubricating oil state monitoring, it still relies on traditional regular manual inspections, making it difficult to achieve real-time monitoring of the degree of lubricating oil contamination or deterioration during operation, thus increasing the maintenance cost and potential operation and maintenance risks. When the reducer shows structural or operational abnormalities, this solution also lacks the ability of systematic parameter linkage judgment, making it difficult to quickly and accurately locate the cause of the fault, which is not conducive to the intelligent operation and maintenance and rapid response of the equipment.

[0005] Therefore, there is an urgent need for a new type of helical gear reducer device with a reasonable structure, multi-parameter linkage judgment ability, and capable of reducing operating noise and improving service reliability to meet the actual needs of current intelligent manufacturing and efficient operation and maintenance. Summary of the Invention

[0006] The object of the present invention is to provide a low-noise parallel shaft helical gear reducer to solve the problems raised in the above-mentioned background technology.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A low-noise parallel shaft helical gear reducer, including a rear housing, characterized in that: a front housing is fixedly connected to the front side of the rear housing, an oil injection hole is provided in the upper part of the rear housing, an oil drain hole is provided in the lower part of the rear housing, an output motor is provided on the rear side of the rear housing, the output end of the output motor is fixedly connected to a first rotating rod, the front end of the first rotating rod sequentially passes through the rear housing and the front housing and is rotatably connected to the outer wall of the front housing through a bearing, a cavity is formed between the rear housing and the front housing, a first gear, a second gear, a third gear and a fourth gear are arranged inside the cavity, the first gear meshes with the second gear, the third gear meshes with the fourth gear, the first gear is fixed on the first rotating rod, the fourth gear is fixedly installed on the third rotating rod, and the front end of the third rotating rod is rotatably connected to the front housing and the rear end passes through the rear housing and extends to the rear side thereof; A vibration detection module and a control module are provided on the rear side of the rear housing for collecting vibration data and motor power and making a linkage judgment; The rear housing is further provided with a turbidity detection mechanism for detecting the pollution degree of the lubricating oil in the cavity; A speed detection mechanism is provided on the upper part of the front housing for detecting the speed data of the fourth gear; The control module is electrically connected to the output motor, the vibration detection module, the turbidity detection mechanism and the speed detection mechanism respectively, and is used for judging the equipment state and outputting an abnormal prompt message when the device is running or starting.

[0008] According to the above technical solution, a second rotating rod is further arranged inside the cavity, the front end and the rear end of the second rotating rod are respectively rotatably connected to the outer walls of the front housing and the rear housing through bearings, and the inner walls of the second gear and the third gear are both fixedly connected to the outer wall of the second rotating rod.

[0009] According to the above technical solution, the diameter of the first gear is smaller than that of the second gear, and the diameter of the third gear is smaller than that of the fourth gear.

[0010] According to the above technical solution, the turbidity detection mechanism includes a resistance detection module, and the resistance detection module is arranged at the lower rear side of the rear shell. The turbidity detection mechanism further includes a detection tube, and the detection tube is arranged at the middle rear side of the rear shell, and both ends of the detection tube are fixedly connected to the rear side of the rear shell. The interior of the detection tube is communicated with the interior of the cavity. Round holes are formed in the upper side and the lower side of the detection tube. A first insulating sleeve is fixedly connected to the inner wall of the round hole on the upper side of the detection tube, and a first electrode is fixedly connected to the inner wall of the first insulating sleeve. A second insulating sleeve is fixedly connected to the inner wall of the round hole on the lower side of the detection tube, and a second electrode is fixedly connected to the inner wall of the second insulating sleeve.

[0011] According to the above technical solution, both the first electrode and the second electrode are electrically connected to the resistance detection module. The resistance detection module can apply a voltage between the first electrode and the second electrode, and obtain the resistance value of the lubricating oil by detecting the current in the circuit. The resistance detection module is electrically connected to the control module.

[0012] According to the above technical solution, the detection tube is located at the middle rear side of the second gear, and the left end and the right end of the detection tube are respectively located on the left side and the right side of the second gear.

[0013] According to the above technical solution, the rotational speed detection mechanism is arranged on the upper side of the fourth gear. The rotational speed detection mechanism includes a connection component, a laser rotational speed detection module and a glass sheet. The laser rotational speed detection module is used to detect the rotational speed of the fourth gear. The laser rotational speed detection module is arranged above the glass sheet, and the glass sheet can rotate relative to the front shell.

[0014] According to the above technical solution, the connection component includes a fixing frame. The outer wall of the fixing frame is fixedly connected to the upper side of the front shell. A motor is fixedly connected to the inner wall of the fixing frame. The output end of the motor penetrates through the front shell and extends into the cavity. One end of the motor located inside the cavity is fixedly connected to the upper outer wall of the glass sheet. A wiping rod is also fixedly connected to the upper inner wall of the front shell, and the outer wall of the wiping rod is in contact with the outer wall of the glass sheet.

[0015] According to the above technical solution, the lower surface of the glass sheet is on the same plane as the upper surface of the inner wall of the rear shell and the upper surface of the inner wall of the front shell. One end of the wiping rod extends to the middle of the glass sheet. The wiping rod is made of rubber. The connection part between the motor and the fixing frame is the center of the glass sheet. The laser rotational speed detection module is arranged on the upper front side of the glass sheet, and the lower side of the laser rotational speed detection module is not in contact with the outer wall of the glass sheet.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By providing a vibration detection module and a control module, the present invention can synchronously collect vibration level and output power data during the startup phase of the device, thereby realizing a rapid determination of the mechanical transmission state. When both parameters are outside the threshold range, an abnormal warning can be triggered, enhancing the system's early recognition ability of mechanical failures or abnormal loads at the moment of startup; By providing a turbidity detection mechanism, including a first electrode, a second electrode, and a resistance detection module, it is possible to continuously monitor the change in the concentration of metal impurities in the lubricating oil during the operation of the system, and judge the usage status of the lubricating oil by collecting the resistance value. When the detected turbidity exceeds the limit, a replacement prompt is issued in a timely manner, effectively preventing gear wear and abnormal operation caused by poor lubrication; By providing a laser rotational speed detection module and cooperating with the control module, the rotational speed ratio between the input and the output can be analyzed and judged, thereby indirectly inferring the gear meshing state. If a decrease in the terminal rotational speed is detected when the input rotational speed is constant, it can be accurately determined that the gear is severely worn, further improving the diagnostic accuracy of the system for faults in key parts; By providing a rotational speed detection mechanism, it is possible to utilize the splashing lubricating oil generated by the rotation of the fourth gear and cooperate with the rapidly rotating glass sheet to achieve the active cleaning and redistribution of the lubricating oil in the upper part of the housing, effectively accelerating the circulation and heat dissipation process of the lubricating oil, thereby enhancing the internal temperature control performance and lubrication efficiency of the gearbox, and reducing the problem of system stability decline caused by rising oil temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a rear-side structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the interior of the rear housing of the present invention; Figure 4 is a rear-side structural schematic diagram of the rear housing of the present invention; Figure 5 is a structural schematic diagram of the interior of the detection tube of the present invention; Figure 6 is a structural schematic diagram of the rotational speed detection mechanism of the present invention; Figure 7 is a structural schematic diagram of the interior of the front housing of the present invention; In the figure: 1. Rear shell; 2. Front shell; 3. Oil injection hole; 4. Oil drain hole; 5. Output motor; 6. First rotating rod; 7. First gear; 8. Second rotating rod; 9. Second gear; 10. Third gear; 11. Third rotating rod; 12. Fourth gear; 13. Turbidity detection mechanism; 14. Rotation speed detection mechanism; 15. Control module; 16. Vibration detection module; 301. Resistance detection module; 302. Detection tube; 303. First insulating sleeve; 304. First electrode; 305. Second insulating sleeve; 306. Second electrode; 401. Laser rotation speed detection module; 402. Fixed bracket; 403. Motor; 404. Glass sheet; 405. Cleaning rod. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Please refer to Figures 1-4, the present invention provides a technical solution: a low-noise parallel shaft helical gear reducer, including a rear housing 1, characterized in that: a front housing 2 is fixedly connected to the front side of the rear housing 1, an oil injection hole 3 is provided in the upper part of the rear housing 1, an oil drain hole 4 is provided in the lower part of the rear housing 1, an output motor 5 is provided on the rear side of the rear housing 1, the output end of the output motor 5 is fixedly connected to a first rotating rod 6, the front end of the first rotating rod 6 passes through the rear housing 1 and the front housing 2 in sequence and is rotatably connected to the outer wall of the front housing 2 through a bearing, a cavity is formed between the rear housing 1 and the front housing 2, a first gear 7, a second gear 9, a third gear 10 and a fourth gear 12 are arranged inside the cavity, the first gear 7 meshes with the second gear 9, the third gear 10 meshes with the fourth gear 12, the first gear 7 is fixed on the first rotating rod 6, the fourth gear 12 is fixedly installed on a third rotating rod 11, and the front end of the third rotating rod 11 is rotatably connected to the front housing 2 and the rear end passes through the rear housing 1 and extends to its rear side, a vibration detection module 16 and a control module 15 are arranged on the rear side of the rear housing 1, the model of the vibration detection module 16 can be: PCB Piezotronics 608A11, which is used to collect vibration data and motor power and make a linkage judgment, a turbidity detection mechanism 13 is also arranged on the rear housing 1, which is used to detect the pollution degree of the lubricating oil in the cavity, a speed detection mechanism 14 is arranged on the upper part of the front housing 2, which is used to detect the speed data of the fourth gear 12, the control module 15 is electrically connected to the output motor 5, the vibration detection module 16, the turbidity detection mechanism 13 and the speed detection mechanism 14 respectively, and is used to judge the equipment state and output an abnormal prompt message when the device is running or starting, a second rotating rod 8 is also arranged inside the cavity, the front end and the rear end of the second rotating rod 8 are rotatably connected to the outer wall of the front housing 2 and the outer wall of the rear housing 1 through bearings respectively, the inner walls of the second gear 9 and the third gear 10 are fixedly connected to the outer wall of the second rotating rod 8, the diameter of the first gear 7 is smaller than the diameter of the second gear 9, and the diameter of the third gear 10 is smaller than the diameter of the fourth gear 12; During the actual application of this device, lubricating oil is injected through the oil injection hole 3 to submerge the lower side of the fourth gear 12, and power output is provided through the output motor 5. The output motor 5 drives the first rotating rod 6 to rotate. Since the diameter of the first gear 7 is smaller than the diameter of the second gear 9, the first gear 7 and the second gear 9 are used for speed reduction transmission. At the same time, the second gear 9 drives the third gear 10 to rotate through the second rotating rod 8. Since the diameter of the third gear 10 is smaller than the diameter of the fourth gear 12, the third gear 10 drives the fourth gear 12 for speed reduction transmission, so that the third rotating rod 11 rotates slowly relative to the first rotating rod 6. During the operation of each gear, it is fully lubricated by the lubricating oil, which can reduce the working noise and thus perform power output; By setting the first gear 7, the second gear 9, the third gear 10, the fourth gear 12 and the second rotating rod 8, smooth and efficient speed reduction transmission is achieved. At the same time, the gears are fully lubricated by the lubricating oil injected at the bottom, ensuring the transmission efficiency while effectively reducing the mechanical noise generated during gear meshing and improving the smoothness and quietness of the overall operation of the device.

[0020] Embodiment 2: Please refer to Figures 1-4 , on the basis of Embodiment 1, a technical solution is provided: when the device is started, the control module 15 monitors the starting power of the output motor 5. At the same time, when the output motor 5 starts, it drives the first rotating rod 6 and the first gear 7 to rotate, so that transmission occurs between the gears. When the gears transmit, impact vibration will be generated, which will cause the vibration of the rear shell 1. At the same time, the vibration detection module 16 captures the vibration of the rear shell 1. The control module 15 compares the starting power of the output motor 5 with the vibration level captured by the vibration detection module 16. When both the vibration and the power are within the threshold, the system operates normally. When the vibration and the power exceed the limit synchronously, it indicates that there is an internal mechanical fault or an external load abnormality. The vibration detection module 16 sends an abnormal prompt to the receiving terminal, and the internal abnormality of the system can be further judged; By starting the vibration detection module 16 and the control module 15 in the device and setting corresponding judgment thresholds, when both the vibration data and the power data received by the control module 15 exceed the preset thresholds, the lubricating oil turbidity and the rotation speed are automatically triggered for linkage detection, which is used to comprehensively judge whether the device state is gear wear, lubrication degradation, load abnormality or structural looseness and output abnormal prompt information, so as to realize the rapid identification of the internal state of the machine and the fault warning. When the detected value exceeds the limit, the abnormal prompt can be triggered immediately, which improves the intelligent diagnosis ability and safety of the speed reducer during startup.

[0021] Embodiment 3: Please refer to Figures 1-5, on the basis of the first embodiment and the second embodiment, a technical solution is provided: the turbidity detection mechanism 13 includes a resistance detection module 301, the resistance detection module 301 is arranged at the lower rear side of the rear shell 1, the turbidity detection mechanism 13 further includes a detection tube 302, the detection tube 302 is arranged at the middle rear side of the rear shell 1, and both ends of the detection tube 302 are fixedly connected to the rear side of the rear shell 1. The inside of the detection tube 302 is communicated with the inside of the cavity. Round holes are provided on the upper side and the lower side of the detection tube 302. A first insulating sleeve 303 is fixedly connected to the inner wall of the round hole on the upper side of the detection tube 302, and a first electrode 304 is fixedly connected to the inner wall of the first insulating sleeve 303. A second insulating sleeve 305 is fixedly connected to the inner wall of the round hole on the lower side of the detection tube 302, and a second electrode 306 is fixedly connected to the inner wall of the second insulating sleeve 305. The first electrode 304 and the second electrode 306 are both electrically connected to the resistance detection module 301. The resistance detection module 301 can apply a voltage between the first electrode 304 and the second electrode 306, and obtain the resistance value of the lubricating oil by detecting the current in the circuit. The resistance detection module 301 is electrically connected to the control module 15. The detection tube 302 is located at the middle rear side of the second gear 9, and the left end and the right end of the detection tube 302 are respectively located on the left side and the right side of the second gear 9; During the application of this device, the resistance detection module 301 supplies power to the first electrode 304 and the second electrode 306 periodically. As the lubricating oil in the cavity is contaminated by metal debris during use, its conductivity will change continuously. When the current passes through the first electrode 304 to the lubricating oil and the second electrode 306, the resistance value can be detected by the resistance detection module 301. When the resistance value exceeds the threshold, it means that the lubricating oil needs to be replaced, and a lubricating oil replacement prompt can be sent to the receiving terminal through the control module 15; And when this device is started, if the vibration and the power exceed the limit synchronously, the turbidity detection mechanism 13 can be immediately started to detect the turbidity of the lubricating oil, and at the same time, the control module 15 makes an abnormal determination. If the turbidity does not exceed the threshold at this time, it is determined that the gear is worn. If the turbidity exceeds the limit at this time, it is determined that the performance of the lubricating oil has decreased. If only the vibration detection module 16 detects abnormal vibration, the control module 15 detects that the power of the output motor 5 does not exceed the limit and the turbidity detection mechanism 13 detects normal turbidity, it is determined that the fixing part is loose. If the vibration detection module 16 detects abnormal vibration, the control module 15 detects that the power of the output motor 5 is abnormally exceeded, and the turbidity detection mechanism 13 detects normal turbidity, it is determined that the load is too large. If any of the above abnormalities occur, corresponding prompts are sent to the output end through the control module 15. Thus, when this device has an abnormality, the staff can quickly locate the abnormal part of this device, so as to quickly perform maintenance, make it operate stably, and reduce the working noise caused by abnormal operation; By setting up the turbidity detection mechanism 13, the pollution degree of the lubricating oil can be periodically monitored during the operation of the device, and its conductivity can be judged by the change of the resistance value, so as to judge whether the lubricating oil deteriorates or the gear wears, and then timely remind to replace the lubricating oil or repair the gear, avoiding more serious failures caused by poor lubrication.

[0022] Embodiment 4: Please refer to Figures 1-7 , based on Embodiment 1, Embodiment 2, and Embodiment 3, a technical solution is provided: the rotational speed detection mechanism 14 is arranged above the fourth gear 12. The rotational speed detection mechanism 14 includes a connection component, a laser rotational speed detection module 401, and a glass sheet 404. The laser rotational speed detection module 401 is used to detect the rotational speed of the fourth gear 12. The laser rotational speed detection module 401 is arranged above the glass sheet 404. The glass sheet 404 can rotate relative to the front housing 2. The connection component includes a fixing frame 402. The outer wall of the fixing frame 402 is fixedly connected to the upper side of the front housing 2. The inner wall of the fixing frame 402 is fixedly connected with a motor 403. The output end of the motor 403 penetrates through the front housing 2 and extends into the cavity. One end of the motor 403 located inside the cavity is fixedly connected to the upper side of the outer wall of the glass sheet 404. A wiping rod 405 is also fixedly connected to the upper side of the inner wall of the front housing 2. The outer wall of the wiping rod 405 is in contact with the outer wall of the glass sheet 404. The lower surface of the glass sheet 404 is on the same plane as the upper surface of the inner wall of the rear housing 1 and the upper surface of the inner wall of the front housing 2. One end of the wiping rod 405 extends to the middle of the glass sheet 404. The wiping rod 405 is made of rubber. The connection part between the motor 403 and the fixing frame 402 is the center of the glass sheet 404. The laser rotational speed detection module 401 is arranged on the upper side of the front part of the glass sheet 404, and the lower side of the laser rotational speed detection module 401 is not in contact with the outer wall of the glass sheet 404; During the operation of the device, the laser rotational speed detection module 401 can periodically detect the rotational speed of the fourth gear 12, and then obtain the output rotational speed of the third rotating rod 11. At the same time, the ratio of the output rotational speed to the input rotational speed is calculated through the output rotational speed of the output motor 5 collected by the control module 15, so as to judge the tightness of meshing between the gears. If the output rotational speed of the output motor 5 remains unchanged and the rotational speed of the fourth gear 12 decreases, it is determined that the gear is severely worn, and a prompt is sent through the control module 15. During the process, the glass sheet 404 shields the lower side of the laser rotational speed detection module 401, avoiding the lubricating oil lifted by the fourth gear 12 from soiling the lower side of the laser rotational speed detection module 401; During the rotation of the fourth gear 12, due to the helical tooth structure on its surface, the lubricating oil on the lower side of the cavity will be flung upward, and thus part of the lubricating oil will be flung onto the upper sides of the inner walls of the rear housing 1 and the front housing 2 and the surface of the glass sheet 404. Then, during operation, the starting motor 403 is activated, causing the motor 403 to drive the glass sheet 404 to rotate. Consequently, the lubricating oil adhering to the lower side of the glass sheet 404 is scraped off by the wiper rod 405. At the same time, due to the high-speed rotation of the glass sheet 404, the lubricating oil adhering to its lower side is flung out in all directions due to centrifugal force, causing the lubricating oil adhering to the upper sides of the inner walls of the rear housing 1 and the front housing 2 to be driven to spread in all directions, making the lubricating oil adhering to the upper sides of the inner walls of the rear housing 1 and the front housing 2 drip rapidly or slide down along their side walls, enabling the upper sides of the inner walls of the rear housing 1 and the front housing 2 to continuously adhere to new lubricating oil during the operation of the fourth gear 12, thereby accelerating the rate of heat dissipation of the lubricating oil through the rear housing 1 and the front housing 2; Meanwhile, when troubleshooting abnormal startup of the device, the control module 15 collects the rotational speed information detected by the laser rotational speed detection module 401. If the vibration detection module 16 collects normal vibration, while the laser rotational speed detection module 401 detects a decrease in rotational speed, and the turbidity detection mechanism 13 collects normal lubricating oil turbidity, it is determined that there is an abnormal transmission resistance, and the bearings and gears should be inspected. By promptly troubleshooting, the possibility of device abnormalities can be reduced, thereby making its operation process smoother; By setting the rotational speed detection mechanism 14 and the glass sheet 404, not only can the rotational speed of the third rotating rod 11 be monitored in real time to judge the gear meshing state, but also the residual lubricating oil on the glass sheet 404 can be cleaned during the operation of the device and the heat dissipation cycle of the lubricating oil inside the cavity can be accelerated, thereby enhancing the cooling efficiency of the device and the cleaning stability of gear operation.

[0023] The present invention provides a low-noise parallel shaft helical gear speed reducer, which integrates multiple monitoring and linkage judgment functions, aiming to achieve intelligent perception of the operating state and accurate identification of faults. The main body of the device is the rear housing 1. The output motor 5 drives the first gear 7 and the second gear 9 to engage and transmit through the first rotating rod 6, and then drives the third gear 10 and the fourth gear 12 to reduce the output through the second rotating rod 8, with the third rotating rod 11 connected at the end. The device is provided with an oil injection hole 3 and a turbidity detection mechanism 13 for detecting the state of the lubricating oil, and a rotational speed detection mechanism 14 is arranged on the top of the fourth gear 12 for monitoring the rotational speed of the fourth gear 12 in real time. In terms of monitoring, the device is provided with a vibration detection module 16, a control module 15, and a first electrode 304 and a second electrode 306 to achieve multi-dimensional state acquisition during the startup and operation stages; the system conducts abnormal determination through the linkage logic among vibration, power, rotational speed, and lubricating oil turbidity, can distinguish fault types such as gear wear, lubricating oil deterioration, load abnormality, and fixed structure looseness, and outputs early warning prompts in a timely manner, thereby effectively improving the operating reliability of the equipment, the intelligent level of operation and maintenance, and the service life of the system.

[0024] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0025] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-noise parallel shaft helical gear speed reducer, comprising a rear housing (1), characterized in that: A front shell (2) is fixedly connected to the front side of the rear shell (1). An oil injection hole (3) is provided in the upper part of the rear shell (1), and an oil drain hole (4) is provided in the lower part of the rear shell (1). An output motor (5) is provided on the rear side of the rear shell (1). The output end of the output motor (5) is fixedly connected to a first rotating rod (6). The front end of the first rotating rod (6) sequentially passes through the rear shell (1) and the front shell (2) and is rotatably connected to the outer wall of the front shell (2) through a bearing. A cavity is formed between the rear shell (1) and the front shell (2). Inside the cavity, a first gear (7), a second gear (9), a third gear (10), and a fourth gear (12) are provided. The first gear (7) meshes with the second gear (9), and the third gear (10) meshes with the fourth gear (12). The first gear (7) is fixed on the first rotating rod (6), the fourth gear (12) is fixedly installed on a third rotating rod (11), and the front end of the third rotating rod (11) is rotatably connected to the front shell (2), and the rear end passes through the rear shell (1) and extends to its rear side; A vibration detection module (16) and a control module (15) are provided on the rear side of the rear shell (1) for collecting vibration data and motor power and making a linkage judgment; The rear shell (1) is further provided with a turbidity detection mechanism (13) for detecting the pollution degree of the lubricating oil in the cavity; A speed detection mechanism (14) is provided in the upper part of the front shell (2) for detecting the speed data of the fourth gear (12); The control module (15) is electrically connected to the output motor (5), the vibration detection module (16), the turbidity detection mechanism (13), and the speed detection mechanism (14) respectively, and is used for judging the device state and outputting an abnormal prompt message when the device is running or starting.

2. The low-noise parallel shaft helical gear speed reducer according to claim 1, wherein: A second rotating rod (8) is further provided inside the cavity. The front end and the rear end of the second rotating rod (8) are respectively rotatably connected to the outer wall of the front shell (2) and the outer wall of the rear shell (1) through bearings. The inner walls of the second gear (9) and the third gear (10) are both fixedly connected to the outer wall of the second rotating rod (8).

3. A low-noise parallel shaft helical gear speed reducer according to claim 2, characterized in that: The diameter of the first gear (7) is smaller than the diameter of the second gear (9), and the diameter of the third gear (10) is smaller than the diameter of the fourth gear (12).

4. A low-noise parallel shaft helical gear reducer according to claim 3, characterized in that: The turbidity detection mechanism (13) includes a resistance detection module (301). The resistance detection module (301) is arranged at the lower part of the rear side of the rear shell (1). The turbidity detection mechanism (13) further includes a detection tube (302). The detection tube (302) is arranged at the middle part of the rear side of the rear shell (1), and both ends of the detection tube (302) are fixedly connected to the rear side of the rear shell (1). The interior of the detection tube (302) is communicated with the interior of the cavity. Round holes are formed in the upper side and the lower side of the detection tube (302). A first insulating sleeve (303) is fixedly connected to the inner wall of the round hole on the upper side of the detection tube (302), and a first electrode (304) is fixedly connected to the inner wall of the first insulating sleeve (303). A second insulating sleeve (305) is fixedly connected to the inner wall of the round hole on the lower side of the detection tube (302), and a second electrode (306) is fixedly connected to the inner wall of the second insulating sleeve (305).

5. A low-noise parallel shaft helical gear speed reducer according to claim 4, characterized in that: Both the first electrode (304) and the second electrode (306) are electrically connected to the resistance detection module (301). The resistance detection module (301) can apply a voltage between the first electrode (304) and the second electrode (306), and obtain the resistance value of the lubricating oil by detecting the current in the circuit. The resistance detection module (301) is electrically connected to the control module (15).

6. A low-noise parallel shaft helical gear speed reducer according to claim 5, characterized in that: The detection tube (302) is located at the middle rear side of the second gear (9), and the left end and the right end of the detection tube (302) are respectively located on the left side and the right side of the second gear (9).

7. A low-noise parallel shaft helical gear reducer according to claim 1, characterized in that: The rotation speed detection mechanism (14) is arranged on the upper side of the fourth gear (12). The rotation speed detection mechanism (14) includes a connection component, a laser rotation speed detection module (401) and a glass sheet (404). The laser rotation speed detection module (401) is used to detect the rotation speed of the fourth gear (12). The laser rotation speed detection module (401) is arranged above the glass sheet (404), and the glass sheet (404) can rotate relative to the front shell (2).

8. A low-noise parallel shaft helical gear reducer according to claim 7, characterized in that: The connection component includes a fixing frame (402). The outer wall of the fixing frame (402) is fixedly connected to the upper side of the front shell (2). A motor (403) is fixedly connected to the inner wall of the fixing frame (402). The output end of the motor (403) penetrates through the front shell (2) and extends into the cavity. One end of the motor (403) located inside the cavity is fixedly connected to the upper side of the outer wall of the glass sheet (404). A wiping rod (405) is also fixedly connected to the upper side of the inner wall of the front shell (2), and the outer wall of the wiping rod (405) is in contact with the outer wall of the glass sheet (404).

9. A low-noise parallel shaft helical gear speed reducer according to claim 8, characterized in that: The lower surface of the glass sheet (404) is on the same plane as the upper surface of the inner wall of the rear shell (1) and the upper surface of the inner wall of the front shell (2), and one end of the wiper rod (405) extends to the middle of the glass sheet (404). The wiper rod (405) is made of rubber. The connection between the motor (403) and the fixing bracket (402) is at the center of the glass sheet (404). The laser rotation speed detection module (401) is arranged on the upper side of the front part of the glass sheet (404), and the lower side of the laser rotation speed detection module (401) does not contact the outer wall of the glass sheet (404).

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