High-rigidity heavy-load precision deceleration device capable of realizing state monitoring

Abstract

The application relates to a high-rigidity heavy-load precision reduction device capable of realizing state monitoring, which comprises an outer box shell, a power input unit, a planetary cycloid transmission unit, a power output unit and a state monitoring unit; the planetary cycloid transmission unit is installed in the outer box shell, the power input part is a sun gear, and the power output part is a planet carrier; the power input unit comprises a servo motor and a hand-cranking device, both of which are connected with an input shaft; two input gears fixed on the two input shafts are in mesh with a driving gear, and the driving gear is coaxially and fixedly connected with the sun gear; the power output unit comprises an output gear, which is coaxially and fixedly connected with an output end of the planet carrier; a temperature and pressure sensor, an oil sensor and an adjustable air supply device of the state monitoring unit are all installed on the outer box shell, and an angle sensor is coaxially and fixedly installed on the output gear; the application realizes real-time monitoring of the output angle, oil composition, temperature signal and pressure signal of the reduction device, so that the abnormal state of the reduction device can be rapidly judged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of equipment transmission, and particularly relates to a high-rigidity heavy-load precision speed reducer capable of realizing state monitoring. BACKGROUND

[0002] As a key transmission device, the speed reducer plays an important role in modern mechanical equipment. With the development of industrial products towards heavy-duty, high-rigidity, high-precision, large speed ratio, high load and small size characteristics gradually become the development direction of large speed reducers in the fields of aerospace and shipbuilding.

[0003] The traditional speed reducer is difficult to realize the performance requirements of large speed ratio and high load in a small size, and lacks the monitoring and adjusting ability of the real-time running state of the speed reducer, and does not have the functions of health monitoring and fault early warning. In order to meet the strict pointing accuracy index requirements of such devices, the transmission system needs to adopt new design methods and special structures, and has the ability to monitor the health state of the device in real time, so as to further improve the performance of the precision speed reducer. SUMMARY

[0004] The application provides a high-rigidity heavy-load precision speed reducer capable of realizing state monitoring.

[0005] The above-mentioned purpose of the application is realized by the following technical scheme.

[0006] A high-rigidity heavy-load precision speed reducer capable of realizing state monitoring comprises an outer box shell, a power input unit, a planetary cycloid transmission unit, a power output unit and a state monitoring unit.

[0007] The planetary cycloid transmission unit is installed in the outer box shell, and the power input part is a sun gear and the power output part is a planet carrier.

[0008] The power input unit comprises a servo motor and a hand crank device, the servo motor and the hand crank device are respectively drivenly connected with an input shaft, the two input shafts are rotatably supported on the outer box shell, an input gear is fixedly installed on each of the two input shafts, the two input gears are in mesh with a driving gear, and the driving gear is coaxially and fixedly connected with the sun gear of the planetary cycloid transmission unit.

[0009] The power output unit comprises an output gear, and the output gear is coaxially and fixedly connected with the output end of the planet carrier of the planetary cycloid transmission unit.

[0010] The state monitoring unit comprises an angle sensor, an oil sensor, a temperature and pressure sensor and an adjustable air vent device.

[0011] The angle sensor is coaxially and fixedly installed on the output gear and used for monitoring the rotation angle of the output end of the speed reducer.

[0012] The oil product sensor is fixedly installed on the outer box shell and used for monitoring viscosity, density, trace moisture, water activity and temperature of the oil product in the outer box shell in real time.

[0013] The temperature and pressure sensor is fixedly installed on the outer box shell and used for synchronously monitoring temperature and pressure in the outer box shell.

[0014] The adjustable ventilation device is fixedly installed on the outer box shell and used for balancing air pressure inside and outside the speed reducer.

[0015] Moreover, the outer box shell is designed with a matching port, and the outer box shell is fixedly connected with a mounting rack of a using device through the matching port; the speed reducer is used in a vertical working mode or a horizontal working mode.

[0016] Moreover, the outer box shell is composed of a shell main body part and a shell cover part, and the two are fixedly connected with two ends of a pin gear shell of the planetary cycloid transmission unit through screws; two input shafts are supported on the shell cover through bearings, the temperature and pressure sensor and the adjustable ventilation device are installed on the shell cover, and the oil product sensor is installed on the shell main body.

[0017] Moreover, the adjustable ventilation device is fixedly installed on the outer box shell and includes a ventilation column, a control compression plug, an adjusting spring, a ventilation valve and a filter screen; a threaded interface is arranged on the outer box shell, the ventilation column is provided with external threads and is fixedly installed at the threaded interface of the outer box shell through the external threads; the ventilation column is a column structure provided with a central hole, and the central hole is composed of a filter screen mounting hole section, a ventilation valve guide hole section and an exhaust hole section arranged in sequence from the inside to the outside; the exhaust hole section is provided with internal threads at a position close to the outer port, and is provided with a tapered hole surface at a position close to the ventilation valve guide section; a radial exhaust through hole is arranged at a middle position of the exhaust section of the ventilation column; the ventilation valve adopts a columnar valve body structure with a large upper part and a small lower part and a tapered surface arranged at the middle part; the control compression plug is provided with external threads on an outer surface; the filter screen is fixedly installed in the filter screen mounting hole section; the ventilation valve is transitionally installed at the upper part of the ventilation valve guide hole section and the lower part of the exhaust hole section; the control compression plug is connected with the internal threads of the exhaust hole section through the external threads; the adjusting spring is compressed between the lower part of the control compression plug and the upper part of the ventilation valve, so that the tapered surface of the ventilation valve and the tapered hole surface of the ventilation column are in compression contact.

[0018] Moreover, the bottom surface of the ventilation valve adopts a concave arc-shaped bottom surface.

[0019] The application has the advantages and positive effects that:

[0020] 1、The transmission unit adopts a small-tooth-difference cycloid transmission form, greatly shortens the axial size of the device, doubles the overload capacity, effectively controls the overall size of the device and improves the bearing performance, and ensures that the output end of the transmission device has a smaller elastic torsion angle and better precision retention under the action of a large torque.

[0021] 2、The application collects multiple types of monitoring data of the speed reducer, including output angle, oil composition, temperature signal and pressure signal, quantitatively analyzes the real-time state data fluctuation of the speed reducer, and realizes rapid judgment of abnormal state of the speed reducer.

[0022] 3、The application sets a hand-operated device and an adjustable ventilation device, when the servo motor is damaged or power failure occurs, the hand-operated device can be operated to input power through the input gear fixedly connected thereto, so as to realize the function of manually driving the speed reducer; the internal temperature and pressure data of the speed reducer are monitored in real time, the internal pressure of the speed reducer can be adjusted in real time by adjusting the pre-tightening force of the ventilation device by the controller, and the reliability of the speed reducer is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the transmission principle diagram of the application;

[0024] Figure 2 is the internal cross-sectional view of the application;

[0025] Figure 3 is the appearance schematic view of the application;

[0026] Figure 4 is the installation cross-sectional view of the adjustable ventilation device of the application; DETAILED DESCRIPTION

[0027] The structure of the application will be further described below in combination with the drawings and through examples. It should be noted that the examples are descriptive rather than limiting.

[0028] A high-rigidity heavy-load precision speed reducer capable of realizing fault early warning, please see Figures 1-4 , mainly comprising an outer box shell 1, an input gear 2, a servo motor 3, a driving gear 4, a hand-operated device 5, a sun gear 6, a planet gear 7, a crank shaft 8, a cycloid gear 9, a pin gear shell 10, a planet carrier 11, an output gear 12, an angle sensor 13, an oil sensor 14, an adjustable ventilation device 15 and a temperature and pressure sensor 16.

[0029] The outer box shell 1 is designed with a matching port and a screw gap hole, and is fixedly connected with the mounting rack of the use equipment through screws, and the whole can adopt a vertical or horizontal working mode.

[0030] The servo motor and the hand crank device constitute a power input unit for realizing electric power input and hand power input respectively.

[0031] The servo motor 3 and the hand crank device 5 each perform power input through an input shaft fixedly connected with a corresponding input gear 2, the input shaft being rotatably supported on the outer box shell 1, the input gear 2 being in parallel tooth transmission with a main power gear 4, the main power gear 4 inputting power to a sun gear 6 of a planetary cycloid transmission unit through a main power shaft fixedly connected therewith.

[0032] The sun gear 6, the planetary gears 7, the crank shafts 8, the cycloid gears 9, the pin gear shell 10 and the planet carrier 11 cooperatively constitute the planetary cycloid transmission unit.

[0033] The sun gear 6 is in parallel tooth transmission with the planetary gears 7, the three planetary gears 7 being respectively installed at the shaft ends of the three crank shafts 8 through spline connection, so as to realize transmission of rotation of the sun gear to the crank shafts through tooth engagement.

[0034] The crank shaft 8 has two eccentric outer circle portions oppositely arranged at 180°, the two eccentric outer circle portions being rotatably cooperatively arranged with the two cycloid gears 9 respectively, and the two sides of the eccentric outer circle portions of the crank shaft being coaxially rotatably supported on the planet carrier 11.

[0035] The cycloid gear 9 is uniformly arranged with three bearing positions in the circumferential direction, and a driving sleeve is installed in each bearing position, the two cycloid gears being rotatably cooperatively arranged with the two eccentric outer circle portions of the three crank shafts through the three bearing positions respectively.

[0036] The pin gear shell 10 is fixedly connected with the outer box shell 1, and a semicylindrical groove is uniformly arranged on the inner circle of the pin gear shell in the circumferential direction for installing a pin gear pin, the pin gear shell being tooth-engaged with the outer circles of the two cycloid gears 9 through the pin gear pin, and being rotatably cooperatively arranged with the planet carrier 11 through the support bearings installed on the two sides of the inner circle.

[0037] The planet carrier 11 is in a cylindrical structure, and is uniformly arranged with three bearing positions in the circumferential direction for rotatably cooperatively arranging with the crank shafts, and is arranged with bearing installation positions at the two ends of the outer circle.

[0038] The output gear 12 of the output unit is coaxially fixedly connected with the output end of the planet carrier 11 of the planetary cycloid transmission unit, and can be tooth-engaged with an internal gear ring fixedly installed on the mounting frame to output power.

[0039] The angle sensor 13, the oil product sensor 14, the temperature and pressure sensor 16 and the adjustable air vent device 15 constitute a state monitoring unit.

[0040] The angle sensor 13 is coaxially fixedly installed on the output gear 12, and the angle sensor is a high-precision angle encoder, which feeds back the rotation angle of the output end of the speed reducer through monitoring the rotation angle of the output gear.

[0041] The oil sensor 14 is fixedly installed on the outer box shell 1 to monitor the viscosity, density, trace moisture, water activity and temperature of the oil in the outer box shell during operation of the device.

[0042] The temperature and pressure sensor 16 is fixedly installed on the outer box shell 1 to realize synchronous measurement of temperature and pressure by integrating temperature and pressure sensitive elements in the same sensor.

[0043] The adjustable breather 15 is fixedly installed on the outer box shell 1 and includes a breather column 151, a control compression plug 152, an adjusting spring 153, a breather valve 154 and a filter screen 155. A threaded interface is arranged on the outer box shell, and the breather column is provided with external threads and fixedly installed at the threaded interface of the outer box shell by the external threads. The breather column is a column structure provided with a central hole, which is composed of a filter screen mounting hole section, a breather valve guide hole section and an exhaust hole section arranged in sequence from the inside to the outside. The exhaust hole section is provided with internal threads at a position close to the outer port, and a tapered hole surface is arranged at a position close to the breather valve guide section. An exhaust through hole is arranged in the breather column at a position corresponding to the middle of the exhaust section to realize outward exhaust. The breather valve adopts a columnar valve body structure with a large upper part and a small lower part and a tapered surface arranged in the middle. The control compression plug is provided with external threads on the outer surface. The filter screen is fixedly installed in the filter screen mounting hole section to prevent foreign matters from entering the inside. The breather valve is transitionally installed in the upper part of the breather valve guide hole section and the lower part of the exhaust hole section. The control compression plug is connected with the internal threads of the exhaust hole section by the external threads, and the adjusting spring is compressed between the lower part of the control compression plug and the upper part of the breather valve to make the tapered surface of the breather valve and the tapered hole surface of the breather column form compression contact. When the deceleration device continuously operates, the internal air pressure gradually increases, and the oil mist enters the breather, and the pre-tightening force of the adjusting spring 153 is adjusted by the control compression plug 152. When the internal air pressure of the decelerator is greater than the spring pressure received by the breather valve 154, the breather valve moves outward along the breather column 151, at which time the device is communicated with the outside to exhaust, and the internal air pressure of the deceleration device is reduced. The oil mist passes through the filter screen 155 and the arc-shaped bottom surface of the breather valve 154 to return to the inside of the decelerator.

[0044] In the application, the outer box shell is composed of a shell body part and a shell cover part, which are fixedly connected with the two ends of the pin gear shell by screws. The two input shafts are supported on the shell cover by bearings, the temperature and pressure sensor and the adjustable breather are both installed on the shell cover, and the oil sensor is installed on the shell body.

[0045] The working principle of the high-rigidity heavy-load precision deceleration device capable of realizing fault early warning is as follows:

[0046] The servo motor 3 drives the input shaft to rotate to input power, the input gear 2 meshes with the driving gear 4 and the sun gear 6 meshes with the planetary gear 7 to transmit power to the crank shaft 8, the crank shaft 8 rotates to drive the cycloid gear 9 to move in a plane, the cycloid gear 9 and the pin gear shell 10 mesh with each other to drive the planetary carrier 11 to rotate, and finally the output gear 12 coaxially fixed on the output end of the planetary carrier 11 meshes with the inner ring gear on the mounting frame to drive the load to output power.

[0047] When the motor works abnormally, the hand crank device 5 can be operated to input power through the input gear fixedly connected thereto to manually drive the speed reducer.

[0048] The state monitoring unit includes an angle sensor 13, an oil sensor 14, a temperature and pressure sensor 16 and an adjustable ventilation device 15. The monitoring data including the output angle, oil composition, temperature signal and pressure signal of the speed reducer are collected to quickly judge and adjust the abnormal state of the speed reducer.

[0049] The angle sensor 13 feeds back the rotation angle of the output end of the speed reducer by monitoring the rotation angle of the output gear; the oil sensor 14 monitors the viscosity, density, trace moisture, water activity and temperature of the oil during the operation of the device in real time; the temperature and pressure sensor 16 realizes the synchronous measurement of temperature and pressure by integrating temperature and pressure sensitive elements in the same sensor; the adjustable ventilation device adjusts the pre-tightening force of the pre-tightening spring in the ventilation device by using the controller, when the internal air pressure is greater than the set pre-tightening force of the ventilation device, the device communicates with the outside to exhaust.

[0050] Although the embodiments and drawings of the present application are disclosed for the purpose of illustration, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit of the present application and the appended claims, therefore, the scope of the present application is not limited to the disclosed contents of the embodiments and drawings.

Claims

1. A high-rigidity, heavy-duty precision deceleration device capable of condition monitoring, characterized in that: The device comprises an outer box shell, a power input unit, a planetary cycloid transmission unit, a power output unit and a state monitoring unit. The planetary cycloid transmission unit is installed in the outer box shell, and the power input unit is a sun gear and the power output unit is a planet carrier. The power input unit comprises a servo motor and a hand crank device, and the servo motor and the hand crank device are respectively drivingly connected with an input shaft which is rotatably supported on the outer box shell. The power output unit comprises an output gear which is coaxially fixedly connected with the planet carrier output end of the planetary cycloid transmission unit. The state monitoring unit comprises an angle sensor, an oil sensor, a temperature and pressure sensor and an adjustable air vent device. The angle sensor is coaxially fixedly installed on the output gear for monitoring the output end rotation angle of the speed reducer. The oil sensor is fixedly installed on the outer box shell for real-time monitoring of the oil viscosity, density, trace moisture, water activity and temperature in the outer box shell. The temperature and pressure sensor is fixedly installed on the outer box shell for synchronous monitoring of the temperature and pressure in the outer box shell. The adjustable air vent device is fixedly installed on the outer box shell for balancing the air pressure inside and outside the speed reducer.

2. The high-rigidity heavy-load precision reduction device capable of state monitoring according to claim 1, characterized by: The outer box shell is designed with a matching port which is fixedly connected with the mounting rack of a using device.

3. The high stiffness heavy duty precision reduction device with achievable condition monitoring of claim 1, wherein: The speed reducer adopts a vertical working mode or a horizontal working mode during use.

4. The high stiffness heavy duty precision reduction device with achievable condition monitoring of claim 1, wherein: The outer box shell is composed of a shell main body part and a shell cover part which are fixedly connected with the two ends of the pin gear shell of the planetary cycloid transmission unit through screws. The temperature and pressure sensor and the adjustable air vent device are installed on the shell cover, and the oil sensor is installed on the shell main body. The bottom surface of the air vent valve is an arc-shaped concave bottom surface.

Images