Motor

Abstract

The invention relates to the technical field of motors, in particular to a motor. The motor comprises a rotating shaft, a first oil seal and a second oil seal. The rotating shaft is provided with an oil discharge channel, and an oil inlet is formed in the outer side face of the rotating shaft and communicates with the oil discharge channel. The first oil seal is arranged around the rotating shaft, the second oil seal is arranged around the rotating shaft, the second oil seal and the first oil seal are arranged at intervals in the axial direction of the rotating shaft, and an oil discharge space is formed between the first oil seal and the second oil seal. The oil inlet is located between the first oil seal and the second oil seal in the axial direction of the rotating shaft, and the oil inlet communicates with the oil discharge space. By arranging the first oil seal and the second oil seal, the sealing performance can be remarkably improved, and motor damage caused by the fact that lubricating oil enters the motor due to failure of the first oil seal is avoided. Meanwhile, by arranging the oil discharge channel communicated with the oil inlet, the lubricating oil in the oil discharge space can be guided into the oil discharge channel after the first oil seal fails.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor. Background Art

[0002] In recent years, with the rapid development of industrial production automation and intelligence, motors have been widely used in industrial production equipment. The transmission structure such as the reducer connected to the motor contains a large amount of lubricating oil. If the lubricating oil enters the motor, it will cause the brake inside the motor to fail and cause an accident.

[0003] In the prior art, an oil seal is usually designed on the front cover to prevent external lubricating oil from entering the interior of the motor. However, the oil seal is easily damaged by iron filings generated by the transmission structure, which allows the lubricating oil to enter the interior of the motor and damage the motor. Summary of the invention

[0004] The invention provides a motor, which is used to prevent lubricating oil from entering the interior of the motor after a layer of oil seal is damaged and fails.

[0005] The present invention provides a motor, comprising:

[0006] A rotating shaft, wherein the rotating shaft is provided with an oil discharge passage, and an outer side surface of the rotating shaft is provided with an oil inlet, and the oil inlet is connected to the oil discharge passage;

[0007] a first oil seal, the first oil seal being arranged around the rotating shaft;

[0008] a second oil seal, the second oil seal being arranged around the rotating shaft, the second oil seal and the first oil seal being arranged at an interval in the axial direction of the rotating shaft, and an oil discharge space being formed between the first oil seal and the second oil seal;

[0009] Wherein, the oil inlet is located between the first oil seal and the second oil seal in the axial direction of the rotating shaft, and the oil inlet is connected to the oil discharge space.

[0010] In one embodiment, the end surface of the rotating shaft is further provided with an oil outlet, and the oil outlet is connected to the oil discharge channel.

[0011] In one embodiment, an oil mark is further included, and the oil mark is arranged at the oil outlet.

[0012] In one embodiment, the number of the oil inlets is four, and the four oil inlets are evenly distributed around the axis of the rotating shaft.

[0013] In one embodiment, the inner wall of the oil drainage channel is provided with a step, and the step includes a first step surface, a connecting surface and a second step surface connected in sequence, the second step surface is closer to the center of the rotating shaft than the first step surface, and the first step surface is provided with a detection device, and the detection device is adjacent to the connecting surface.

[0014] In one embodiment, the detection device comprises a thermistor.

[0015] In one embodiment, a processing device is further included, which is arranged on the outer side of the rotating shaft; the outer side of the rotating shaft is also provided with a wire hole, which is connected to the oil drainage channel, and the wire of the thermistor extends out of the oil drainage channel through the wire hole and is electrically connected to the processing device.

[0016] In one embodiment, the processing device comprises:

[0017] a commutator, the commutator being electrically connected to a wire of the thermistor; and

[0018] An angle sensor is electrically connected to the commutator.

[0019] In one embodiment, the wire hole is sealed and only allows wires of the thermistor to extend out.

[0020] In one embodiment, the number of the wire holes is four, and the four wire holes are evenly distributed around the axis of the rotating shaft.

[0021] The present application provides a motor, which has at least the following beneficial effects compared with the prior art:

[0022] The present application can significantly improve the sealing performance by setting the first oil seal and the second oil seal. At the same time, the second oil seal can still play a sealing effect when the first oil seal fails, thereby preventing the failure of the first oil seal from causing the lubricating oil to enter the motor and cause damage to the motor. At the same time, by setting an oil discharge channel connected to the oil inlet, the lubricating oil in the oil discharge space can be guided into the oil discharge channel after the failure of the first oil seal, thereby preventing the lubricating oil in the oil discharge space and accumulated at the second oil seal from causing uneven pressure on the second oil seal and causing damage to the second oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0024] Figure 1 is a schematic diagram of the structure of the motor provided in the embodiment of the present application;

[0025] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 yes Figure 1 The enlarged view of point B in the middle;

[0027] Figure 4 yes Figure 1 Enlarged view of point C in the middle.

[0028] Reference numerals:

[0029] 1. Motor;

[0030] 11, rotating shaft; 111, oil discharge channel; 1111, first channel; 1112, second channel; 112, oil inlet; 113, oil outlet; 114, wire hole;

[0031] 12. First oil seal;

[0032] 13. Second oil seal;

[0033] 14. Oil mark;

[0034] 15, step; 151, first step surface; 152, connecting surface; 153, second step surface;

[0035] 16. Detection device;

[0036] 17. Processing device; 171. Commutator; 172. Angle sensor;

[0037] 181, front end cover; 1811, mounting groove; 1812, first oil seal groove; 1813, second oil seal groove; 182, rear end cover;

[0038] 2. Oil drainage space. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In this application, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0043] Please also read Figure 1 and Figure 2 The embodiment of the present application provides a motor 1, comprising a rotating shaft 11, a first oil seal 12 and a second oil seal 13. The rotating shaft 11 is provided with an oil drain passage 111, and an oil inlet 112 is provided on the outer side of the rotating shaft 11, and the oil inlet 112 is connected to the oil drain passage 111. The first oil seal 12 is arranged around the rotating shaft 11, and the second oil seal 13 is arranged around the rotating shaft 11, and the second oil seal 13 and the first oil seal 12 are arranged at intervals in the axial direction of the rotating shaft 11, and an oil drain space 2 is formed between the first oil seal 12 and the second oil seal 13. Among them, the oil inlet 112 is located between the first oil seal 12 and the second oil seal 13 in the axial direction of the rotating shaft 11, and the oil inlet 112 is connected to the oil drain space 2.

[0044] In this embodiment, the motor 1 may further include a front cover 181 and a rear cover 182 that can be assembled, the rotating shaft 11 is rotatably arranged on the front cover 181 and the rear cover 182, and the two ends of the rotating shaft 11 protrude from the front cover 181 and the rear cover 182 respectively. The front cover 181 is provided with a mounting groove 1811, the rotating shaft 11 is penetrated through the mounting groove 1811, the first oil seal 12 and the second oil seal 13 are both located in the mounting groove 1811 and are both arranged around the rotating shaft 11, the inner sides of the first oil seal 12 and the second oil seal 13 abut against the outer side of the rotating shaft 11, and the outer sides of the first oil seal 12 and the second oil seal 13 abut against the groove wall of the mounting groove 1811, thereby achieving a double-layer sealing effect.

[0045] Specifically, the groove wall of the installation groove 1811 can be provided with a first oil seal groove 1812 and a second oil seal groove 1813, the first oil seal 12 is provided in the first oil seal groove 1812, and the second oil seal 13 is provided in the second oil seal groove 1813, and the first oil seal groove 1812 and the second oil seal groove 1813 can achieve the effect of fixing the first oil seal 12 and the second oil seal 13.

[0046] The first oil seal 12 may be located outside the second oil seal 13, that is, the second oil seal 13 is located between the first oil seal 12 and the rear end cover 182. It should be noted that the first oil seal 12 and the second oil seal 13 are spaced apart in the axial direction of the rotating shaft 11, and an oil discharge space 2 is formed between the first oil seal 12, the second oil seal 13, the outer side surface of the rotating shaft 11, and the groove wall of the mounting groove 1811 of the front end cover 181.

[0047] In addition, the oil inlet 112 is located between the first oil seal 12 and the second oil seal 13 in the axial direction of the rotating shaft 11 , that is, the oil inlet 112 is connected to the oil discharge space 2 .

[0048] In this embodiment, when the first oil seal 12 is not damaged, the oil drain space 2 is sealed by the first oil seal 12 , the second oil seal 13 , the outer side surface of the rotating shaft 11 and the groove wall of the installation groove 1811 .

[0049] When the first oil seal 12 is damaged, the first oil seal 12 loses the effect of sealing the oil drain space 2 , and the lubricating oil can enter the oil drain space 2 from the damaged position of the first oil seal 12 , but the second oil seal 13 still has a sealing effect and blocks the lubricating oil in the oil drain space 2 .

[0050] The lubricating oil in the oil discharge space 2 can enter the oil discharge channel 111 through the oil inlet 112, which can prevent the lubricating oil from accumulating at the second oil seal 13 and avoid damage to the second oil seal 13 due to uneven pressure caused by the accumulation of lubricating oil.

[0051] In this embodiment, by providing the first oil seal 12 and the second oil seal 13, the sealing performance can be significantly improved. At the same time, when the first oil seal 12 fails, the second oil seal 13 can still play a sealing effect, thereby preventing the failure of the first oil seal 12 from causing the lubricating oil to enter the motor 1 and cause damage to the motor 1. At the same time, by providing the oil discharge channel 111 connected to the oil inlet 112, the lubricating oil in the oil discharge space 2 can be guided into the oil discharge channel 111 after the failure of the first oil seal 12, thereby preventing the lubricating oil in the oil discharge space 2 and accumulated at the second oil seal 13 from causing uneven pressure on the second oil seal 13 and causing damage to the second oil seal 13.

[0052] Please continue reading Figure 1 and Figure 2 In one embodiment, an oil outlet 113 is further provided on the end surface of the rotating shaft 11 , and the oil outlet 113 is connected to the oil discharge channel 111 .

[0053] The oil outlet 113 may be provided on an end surface of the rotating shaft 11 protruding from the rear end cover 182 .

[0054] Exemplarily, the oil discharge channel 111 may include a first channel 1111 and a second channel 1112 that are interconnected, wherein the oil inlet 112 is located at one end of the first channel 1111 away from the second channel 1112, and the oil outlet 113 is located at one end of the second channel 1112 away from the first channel 1111. The extension direction of the first channel 1111 may be inclined relative to the radial direction of the rotating shaft 11 and inclined relative to the axial direction of the rotating shaft 11, and the extension direction of the second channel 1112 may be parallel to the axial direction of the rotating shaft 11. Of course, the extension direction of the first channel 1111 and the extension direction of the second channel 1112 may be other directions, which are not limited here.

[0055] In this embodiment, when the first oil seal 12 is not damaged, the oil drain space 2 is sealed by the first oil seal 12 , the second oil seal 13 , the outer side surface of the rotating shaft 11 and the groove wall of the installation groove 1811 .

[0056] When the first oil seal 12 is damaged, the first oil seal 12 loses the effect of sealing the oil drain space 2 , and the lubricating oil can enter the oil drain space 2 from the damaged position of the first oil seal 12 , but the second oil seal 13 still has a sealing effect and blocks the lubricating oil in the oil drain space 2 .

[0057] The lubricating oil in the oil discharge space 2 can enter the oil discharge passage 111 through the oil inlet 112, which can prevent the lubricating oil from accumulating at the second oil seal 13, and avoid the second oil seal 13 from being damaged due to uneven pressure caused by the accumulation of lubricating oil. The lubricating oil entering the oil discharge passage 111 can be discharged through the oil outlet 113, thereby serving as a warning to the operator, that is, when the operator finds that lubricating oil is discharged from the oil outlet 113, it indicates that the first oil seal 12 has failed, and reminds the maintenance personnel to repair it.

[0058] In this embodiment, by providing the first oil seal 12 and the second oil seal 13, the sealing performance can be significantly improved. At the same time, when the first oil seal 12 fails, the second oil seal 13 can still play a sealing effect, thereby preventing the first oil seal 12 from failing and causing the lubricating oil to enter the motor 1 and cause damage to the motor 1. At the same time, by providing the oil discharge channel 111 connected to the oil inlet 112, the lubricating oil in the oil discharge space 2 can be guided into the oil discharge channel 111 after the first oil seal 12 fails, thereby preventing the lubricating oil in the oil discharge space 2 and accumulated at the second oil seal 13 from causing uneven pressure on the second oil seal 13 and causing damage to the second oil seal 13. When lubricating oil is discharged from the oil outlet 113, it indicates that the first oil seal 12 has failed, thereby achieving the effect of reminding the maintenance personnel to perform maintenance. In addition, since the oil outlet 113 passes through the end of the rotating shaft 11, and the end of the rotating shaft 11 protrudes from the rear end cover 182, the lubricating oil will not be discharged into the motor 1 when it is discharged through the oil outlet 113, thereby avoiding damage to the motor 1.

[0059] In some other embodiments, the oil outlet 113 may also pass through the outer side surface of the rotating shaft 11 .

[0060] Please refer again Figure 1 In one embodiment, the motor 1 further includes an oil mark 14 , which is disposed at the oil outlet 113 .

[0061] In this embodiment, when the first oil seal 12 is not damaged, the oil drain space 2 is sealed by the first oil seal 12 , the second oil seal 13 , the outer side surface of the rotating shaft 11 and the groove wall of the installation groove 1811 .

[0062] When the first oil seal 12 is damaged, the first oil seal 12 loses the effect of sealing the oil drain space 2 , and the lubricating oil can enter the oil drain space 2 from the damaged position of the first oil seal 12 , but the second oil seal 13 still has a sealing effect and blocks the lubricating oil in the oil drain space 2 .

[0063] The lubricating oil in the oil discharge space 2 can enter the oil discharge passage 111 through the oil inlet 112, which can prevent the lubricating oil from accumulating at the second oil seal 13, and avoid the second oil seal 13 from being damaged due to uneven pressure caused by the accumulation of lubricating oil. The lubricating oil entering the oil discharge passage 111 can be discharged through the oil mark 14 of the oil outlet 113, thereby serving as a warning to the operator, that is, when the operator finds that the oil mark 14 of the oil outlet 113 has lubricating oil discharged, it indicates that the first oil seal 12 has failed, and reminds the maintenance personnel to repair it.

[0064] In this embodiment, the oil mark 14 is arranged at the oil outlet 113, which can play the role of one-way passage of lubricating oil. That is, when the lubricating oil flows from the oil discharge channel 111 to the oil outlet 113, the oil mark 14 can allow the lubricating oil to pass through, so that the lubricating oil can be discharged through the oil outlet 113, while external impurities cannot enter the oil discharge channel 111 through the oil mark 14.

[0065] In some other embodiments, a filter screen may also be provided at the oil outlet 113 , and the mesh size of the filter screen may allow the lubricating oil to pass through while preventing most impurities from passing through.

[0066] In one embodiment, the number of the oil inlets 112 is four, and the four oil inlets 112 are evenly distributed around the axis of the rotating shaft 11 .

[0067] It is understandable that the rotating shaft 11 will rotate along the axis of the rotating shaft 11 itself, and the rotating shaft 11 needs to maintain dynamic balance during the rotation process, that is, the rotating shaft 11 needs to keep the resultant force and the resultant torque of the rotational inertia force equal to zero when rotating. The dynamic balance is directly related to the operating stability, vibration and noise level and service life of the motor 1. If the mass of the rotating shaft 11 is unbalanced, that is, the center of gravity of the rotating shaft 11 is not on the axis of the rotating shaft 11, the rotating shaft 11 will generate centrifugal force to cause the rotating shaft 11 to vibrate, thereby affecting the performance of the motor 1. Based on this, in order to ensure the mass balance of the rotating shaft 11, four oil inlets 112 can be set in this embodiment, and the four oil inlets 112 are distributed around the axis of the rotating shaft 11 to roughly achieve the mass balance of the rotating shaft 11, thereby ensuring the dynamic balance of the rotating shaft 11.

[0068] In some other embodiments, the number of the oil inlets 112 may also be an even number such as two or six, which is not limited here.

[0069] Please also read Figure 1 and Figure 3 In one embodiment, a step 15 is provided on the inner wall of the oil drain channel 111. The step 15 includes a first step surface 151, a connecting surface 152 and a second step surface 153 which are connected in sequence. The second step surface 153 is closer to the center of the rotating shaft 11 than the first step surface 151. The first step surface 151 is provided with a detection device 16, and the detection device 16 is adjacent to the connecting surface 152.

[0070] It is understandable that the detection device 16 is disposed in the oil drain channel 111 , and can perform real-time monitoring of the components in the motor 1 to obtain real-time monitoring data for operators to judge the operating status of the motor 1 .

[0071] The first step surface 151 and the second step surface 153 may be parallel to the central axis of the rotating shaft 11, and the connecting surface 152 may be perpendicular to the first step surface 151. Of course, the connecting surface 152 may also be inclined relative to the first step surface 151 and may be inclined relative to the radial direction of the rotating shaft 11, which is not limited here.

[0072] In this embodiment, the second step surface 153 is closer to the center of the rotating shaft 11 than the first step surface 151, that is, the distance from the second step surface 153 to the central axis of the rotating shaft 11 is greater than the distance from the first step surface 151 to the central axis of the rotating shaft 11. When the lubricating oil passes through the step 15 in the process of flowing in the oil discharge channel 111, the lubricating oil first flows on the second step surface 153 and then flows to the first step surface 151. The detection device 16 is arranged at a position near the connecting surface 152 of the first step surface 151, which can reduce the impact of the lubricating oil on the detection device 16 when the lubricating oil flows, and avoid the detection device 16 from falling off under the impact of the lubricating oil. At the same time, it can also avoid the detection device 16 from hindering the flow of the lubricating oil in the oil discharge channel 111. In addition, the detection device 16 is arranged at a position near the connecting surface 152 of the first step surface 151, which can play a role in accurately positioning the detection device 16.

[0073] In this embodiment, when the first oil seal 12 is not damaged, the oil drain space 2 is sealed by the first oil seal 12 , the second oil seal 13 , the outer side surface of the rotating shaft 11 and the groove wall of the installation groove 1811 .

[0074] When the first oil seal 12 is damaged, the first oil seal 12 loses the effect of sealing the oil drain space 2 , and the lubricating oil can enter the oil drain space 2 from the damaged position of the first oil seal 12 , but the second oil seal 13 still has a sealing effect and blocks the lubricating oil in the oil drain space 2 .

[0075] The lubricating oil in the oil discharge space 2 can enter the oil discharge channel 111 through the oil inlet 112, which can prevent the lubricating oil from accumulating at the second oil seal 13, and avoid the second oil seal 13 from being damaged due to uneven pressure caused by the accumulation of lubricating oil. When the lubricating oil enters the oil discharge channel 111, it first flows on the second step surface 153, then flows to the first step surface 151 through the second step surface 153, and finally flows along the oil discharge channel 111 and can be discharged through the oil outlet 113, thereby serving as a warning to the operator. That is, when the operator finds that lubricating oil is discharged from the oil outlet 113, it indicates that the first oil seal 12 has failed, and reminds the maintenance personnel to repair it.

[0076] In some other embodiments, the oil drain channel 111 may be a smooth surface.

[0077] In some examples, multiple detection devices 16 can be set at multiple detection points according to needs, so multiple steps 15 can be set on the inner wall of the oil discharge channel 111 along the axial direction of the rotating shaft 11. It should be noted that among two adjacent steps 15, one step 15 is closer to the front cover 181, and the other step 15 is closer to the rear cover 182. The first step surface 151 of the step 15 closer to the front cover 181 and the second step surface 153 of the step 15 closer to the rear cover 182 can be on the same plane. Therefore, the distance from the detection device 16 installed on the step 15 closer to the front cover 181 to the central axis of the rotating shaft 11 is shorter than the distance from the detection device 16 installed on the step 15 closer to the rear cover 182 to the central axis of the rotating shaft 11.

[0078] It is understandable that the detection device can be different types of sensors to monitor the various components in the motor 1 in real time to obtain different types of data in real time, so that life warnings for various components can be given based on the obtained data. In addition, it can also determine whether the shaft 11 is likely to be overloaded, thereby improving the reliability of the motor 1.

[0079] In one embodiment, the detection device 16 includes a thermistor.

[0080] Exemplarily, the motor 1 may further include a bearing assembled with the rotating shaft 11. It is understandable that the rotation of the rotating shaft 11 will cause the bearing to heat up, and whether the bearing is working abnormally can be determined based on the temperature life curve of the bearing. Therefore, a step 15 may be provided at a position corresponding to the oil discharge channel 111 and the bearing, and a thermistor may be provided on the first step surface 151 of the step 15 to monitor the temperature of the bearing in real time, thereby determining whether the bearing is working abnormally or has reached the upper limit of its service life.

[0081] Among them, in order to improve the accuracy of monitoring the actual temperature of the bearing, multiple thermistors can be set on the first step surface 151 of the same step 15, and the multiple thermistors can be evenly distributed around the axial direction of the rotating shaft 11, so that the temperature data of the same bearing can be monitored in real time according to multiple thermistors to avoid monitoring abnormalities of a single thermistor.

[0082] Of course, other components can be sleeved on the outer side of the rotating shaft 11, so steps 15 can be set at positions corresponding to other components in the oil discharge channel 111, and thermistors can be set on the first step surfaces 151 of the steps 15 to monitor the temperatures of other components in real time.

[0083] In a more specific example, the motor 1 may include two bearings assembled with the rotating shaft 11, and one of the bearings is close to the front cover 181, and the other bearing is close to the rear cover 182. Two steps 15 are provided on the inner wall of the oil discharge passage 111 of the rotating shaft 11, one of the steps 15 is close to the front cover 181 and matches with the bearing close to the front cover 181, and the other step 15 is close to the rear cover 182 and matches with the bearing close to the rear cover 182.

[0084] It should be noted that the second step surface 153 of the step 15 close to the front end cover 181 is closest to the center of the rotating shaft 11, and the first step surface 151 of the step 15 close to the front end cover 181 is farther away from the center of the rotating shaft 11 than the second step surface 153 of the step 15 close to the front end cover 181; the first step surface 151 of the step 15 close to the rear end cover 182 is farthest from the center of the rotating shaft 11, and the second step surface 153 of the step 15 close to the rear end cover 182 is closer to the center of the rotating shaft 11 than the first step surface 151 of the step 15 close to the rear end cover 182; and the first step surface 151 of the step 15 close to the front end cover 181 and the second step surface 153 of the step 15 close to the rear end cover 182 are roughly on the same plane.

[0085] Thermistors can be provided on the first step surfaces 151 of the two steps 15. During the rotation of the rotating shaft 11, the step 15 close to the front end cover 181 can be used to monitor the temperature of the bearing close to the front end cover 181 in real time, and the step 15 close to the rear end cover 182 can be used to monitor the temperature of the bearing close to the rear end cover 182 in real time. The temperatures of the two bearings can be respectively monitored in real time by the two thermistors, and whether the bearings are working abnormally can be determined according to the temperature life curve of the bearings.

[0086] In summary, steps 15 can be set at the positions corresponding to the oil discharge channel 111 and the two bearings, and thermistors can be set on the first step surfaces 151 of the two steps 15 to monitor the temperature of the bearings in real time, so as to determine whether the bearings are working abnormally or have reached the upper limit of their service life.

[0087] Of course, more steps 15 and thermistors may be provided to respectively monitor the temperatures of more components in real time.

[0088] In some other embodiments, the detection device 16 may also include a pressure sensor and a vibration sensor, etc., which can detect in real time whether the motor has a shaft overload problem, and remind the operator to maintain and inspect the assembly quality and load conditions; it can also detect the vibration condition of the motor operation, feedback the signal to the servo drive operation, adaptively adjust the vibration filter control, and provide motor operation stability.

[0089] Please also read Figure 1 and Figure 4In one embodiment, the motor 1 further includes a processing device 17, which is disposed on the outer side of the rotating shaft 11. A wire hole 114 is also provided on the outer side of the rotating shaft 11, and the wire hole is connected to the oil drain channel 111. The wire of the thermistor extends out of the oil drain channel 111 through the wire hole 114 and is electrically connected to the processing device 17.

[0090] The wire hole 114 is disposed on the outer side of the shaft 11 close to one end of the shaft 11 located at the rear end cover 182. The wire of the thermistor can also be in a straight state, thereby reducing the effect of the wire of the thermistor on the flow of lubricating oil in the oil discharge channel 111.

[0091] In addition, the position where the processing device 17 is arranged on the outer side of the rotating shaft 11 can also cover the wire hole 114, that is, the processing device 17 and the wire hole 114 can be arranged roughly in the radial direction of the rotating shaft 11, so that when the wire extends through the wire hole 114, it can be electrically connected to the processing device 17 at the shortest distance.

[0092] In this embodiment, the thermistor can monitor the temperature of the bearing in real time, and the thermistor generates a temperature signal according to the real-time monitored temperature, and the wire of the thermistor extends out of the oil drain channel 111 through the wire hole 114 and is electrically connected to the processing device 17, so that the thermistor can transmit the temperature signal to the processing device 17 through the wire, and the processing device 17 determines whether the bearing is abnormal according to the temperature signal transmitted by the thermistor. Exemplarily, when the temperature monitored in real time by the thermistor is higher than the preset temperature, the processing device 17 determines that the motor 1 is abnormal and alarms to prompt the operator to repair the motor 1; when the temperature monitored in real time by the thermistor is lower than the preset temperature, the processing device 17 determines that the motor 1 is not abnormal.

[0093] In some other embodiments, the thermistor may also be connected to the processing device 17 via wireless transmission methods such as Bluetooth.

[0094] Please continue reading Figure 1 and Figure 4 In one embodiment, the processing device 17 includes a commutator 171 and an angle sensor 172. The commutator 171 is electrically connected to a wire of the thermistor, and the angle sensor 172 is electrically connected to the commutator 171.

[0095] In this embodiment, the thermistor can monitor the temperature of the bearing in real time, and the thermistor generates a temperature signal according to the temperature monitored in real time, and the wire of the thermistor extends out of the oil drain channel 111 through the wire hole 114 and is electrically connected to the commutator 171, so that the thermistor can transmit the temperature signal to the commutator 171 through the wire hole 114, and the commutator 171 can convert the rotating current transmitted by the thermistor through the wire into direct current according to the temperature signal, and the commutator 171 is electrically connected to the angle sensor 172 and transmits the direct current to the angle sensor 172, and the angle sensor 172 obtains the temperature of the bearing according to the direct current, and the angle sensor 172 can determine whether the bearing is abnormal according to the temperature of the bearing obtained by the analysis. Exemplarily, when the temperature obtained by the angle sensor 172 is higher than the preset temperature, the angle sensor 172 determines that the motor 1 is abnormal and alarms to prompt the operator to repair the motor 1; when the temperature obtained by the angle sensor 172 is lower than the preset temperature, the processing device 17 determines that the motor 1 is not abnormal.

[0096] In addition, the angle sensor can provide feedback to the servo driver to calculate and adjust the motor motion control based on the rotation speed of the rotating shaft 11, the angular position information of the rotating shaft 11 and the information collected by the sensor.

[0097] In some other embodiments, the processing device 17 may include other processing elements, which are not described in detail herein.

[0098] In one embodiment, the wire hole 114 is sealed and only allows the wires of the thermistor to extend out.

[0099] In this embodiment, the wire hole 114 is sealed and only allows the wire of the thermistor to extend out, which can prevent the lubricating oil from being discharged through the wire hole 114, thereby preventing the lubricating oil from contaminating the processing device 17.

[0100] Exemplarily, the wire hole 114 can be sealed by gluing after the wire of the thermistor is extended, thereby preventing the lubricating oil from being discharged through the wire hole 114 .

[0101] In this embodiment, when the first oil seal 12 is not damaged, the oil drain space 2 is sealed by the first oil seal 12 , the second oil seal 13 , the outer side surface of the rotating shaft 11 and the groove wall of the installation groove 1811 .

[0102] When the first oil seal 12 is damaged, the first oil seal 12 loses the effect of sealing the oil drain space 2 , and the lubricating oil can enter the oil drain space 2 from the damaged position of the first oil seal 12 , but the second oil seal 13 still has a sealing effect and blocks the lubricating oil in the oil drain space 2 .

[0103] The lubricating oil in the oil discharge space 2 can enter the oil discharge passage 111 through the oil inlet 112, which can prevent the lubricating oil from accumulating at the second oil seal 13, and avoid the second oil seal 13 from being damaged due to uneven pressure caused by the accumulation of lubricating oil. The lubricating oil entering the oil discharge passage 111 can be discharged through the oil outlet 113, thereby serving as a warning to the operator, that is, when the operator finds that lubricating oil is discharged from the oil outlet 113, it indicates that the first oil seal 12 has failed, and reminds the maintenance personnel to repair it.

[0104] It is understandable that when the lubricating oil enters the wire hole from the oil drain channel 111, the lubricating oil cannot be discharged through the wire hole 114 because the wire hole 114 is sealed. The lubricating oil in the wire hole 114 flows back into the oil drain channel 111 and is finally discharged from the oil outlet 113.

[0105] In some other embodiments, a protective cover may also be provided on the outer surface of the processing device 17 to protect the processing device 17 .

[0106] In one embodiment, the number of the wire holes 114 is four, and the four wire holes 114 are evenly distributed around the axis of the rotating shaft 11 .

[0107] It is understandable that the rotating shaft 11 will rotate along the axis of the rotating shaft 11 itself, and the rotating shaft 11 needs to maintain dynamic balance during the rotation process, that is, the rotating shaft 11 needs to keep the resultant force and the resultant torque of the rotational inertia force equal to zero when rotating, and the dynamic balance is directly related to the operating stability, vibration and noise level and service life of the motor 1. If the mass of the rotating shaft 11 is unbalanced, that is, the center of gravity of the rotating shaft 11 is not on the axis of the rotating shaft 11, the rotating shaft 11 will generate centrifugal force to cause the rotating shaft 11 to vibrate, thereby affecting the performance of the motor 1. Based on this, in order to ensure the mass balance of the rotating shaft 11, four wire holes 114 can be set in this embodiment, and the four wire holes 114 are distributed around the axis of the rotating shaft 11 to roughly achieve the mass balance of the rotating shaft 11, thereby ensuring the dynamic balance of the rotating shaft 11.

[0108] In some other embodiments, the number of the wire holes 114 may also be an even number such as two or six, which is not limited here.

[0109] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A motor, characterized in that: include: A rotating shaft, wherein the rotating shaft is provided with an oil discharge passage, and an outer side surface of the rotating shaft is provided with an oil inlet, and the oil inlet is connected to the oil discharge passage; a first oil seal, the first oil seal being arranged around the rotating shaft; a second oil seal, the second oil seal being arranged around the rotating shaft, the second oil seal and the first oil seal being arranged at an interval in the axial direction of the rotating shaft, and an oil discharge space being formed between the first oil seal and the second oil seal; Wherein, the oil inlet is located between the first oil seal and the second oil seal in the axial direction of the rotating shaft, and the oil inlet is connected to the oil discharge space.

2. The motor according to claim 1, characterized in that The end surface of the rotating shaft is also provided with an oil outlet, and the oil outlet is connected to the oil discharge channel.

3. The motor according to claim 2, characterized in that It also includes an oil mark, which is arranged at the oil outlet.

4. The motor according to claim 1, characterized in that The number of the oil inlets is four, and the four oil inlets are evenly distributed around the axis of the rotating shaft.

5. The motor according to any one of claims 1 to 4, characterized in that: The inner wall of the oil drainage channel is provided with a step, and the step includes a first step surface, a connecting surface and a second step surface which are connected in sequence. The second step surface is closer to the center of the rotating shaft than the first step surface. The first step surface is provided with a detection device, and the detection device is adjacent to the connecting surface.

6. The motor according to claim 5, characterized in that The detection device includes a thermistor.

7. The motor according to claim 6, characterized in that It also includes a processing device, which is arranged on the outer side of the rotating shaft; the outer side of the rotating shaft is also provided with a wire hole, the wire hole is connected to the oil drainage channel, and the wire of the thermistor extends out of the oil drainage channel through the wire hole and is electrically connected to the processing device.

8. The motor according to claim 7, characterized in that The processing device comprises: a commutator, the commutator being electrically connected to a wire of the thermistor; and An angle sensor is electrically connected to the commutator.

9. The motor according to claim 7, characterized in that The wire hole is sealed and only allows the wires of the thermistor to extend out.

10. The motor according to claim 7, characterized in that The number of the wire holes is four, and the four wire holes are evenly distributed around the axis of the rotating shaft.

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