1. The utility model provides a test device of motor bearing, is including examining test table, its characterized in that: detect bench and be provided with drive assembly and bearing fixed subassembly, bearing fixed subassembly includes axle housing, axial actuator and radial actuator, axial and radial actuator follow the axle housing respectively and radially set up to connect on the axle housing, be provided with the bearing installation cavity on the axle housing, form the station of awaiting measuring between drive assembly and the axle housing, it is provided with temperature sensor and vibration sensor to await measuring on the station, it still is provided with power supply module to await measuring on the station.

2. The testing device for the motor bearing according to claim 1, wherein: the power supply assembly comprises a 24V power supply and a negative carbon brush and a positive carbon brush which are respectively connected with the outer ring and the inner ring of the bearing to be tested, and the negative pole and the positive pole of the power supply are respectively connected with the negative carbon brush and the positive carbon brush.

3. The testing device for the motor bearing according to claim 2, wherein: the utility model discloses a carbon brush with the elasticity compensation structure, including anodal carbon brush, the axis shell is provided with the guide way that supplies anodal carbon brush installation and direction removal, the axial setting of guide way along the axis shell, be provided with insulating coating on the inner wall of guide way, the elasticity compensation structure is including setting up spring passageway on the axis shell, setting up the pretension spring and the pretension screw of butt on the pretension spring in spring passageway, spring passageway and the coaxial setting of guide way and intercommunication each other, the pretension spring butt is on anodal carbon brush.

4. A testing apparatus for a motor bearing according to claim 3, wherein: and the shaft shell is provided with a wire channel for a wire connected with the anode carbon brush and the anode of the power supply to pass through, and the wire channel is distributed along the radial direction of the shaft shell and is communicated with the guide channel.

5. A testing device for a motor bearing according to any one of claims 1 to 4, characterized in that: and the shaft shell is provided with a temperature detection hole and a vibration detection hole which are used for inserting the temperature sensor and the vibration sensor and are communicated with the bearing installation cavity.

6. A testing device for a motor bearing according to any one of claims 1 to 4, characterized in that: the axial actuator is provided with an axial force sensor, and the radial actuator is provided with a radial force sensor.

7. A testing device for a motor bearing according to any one of claims 1 to 4, characterized in that: the driving assembly comprises a main shaft for driving an inner ring of the bearing to be tested to rotate, a main shaft seat for mounting the main shaft and a motor for driving the main shaft to rotate, and the motor and the main shaft are driven by a belt and two belt pulleys.

8. A test device of a motor bearing according to claim 7, characterized in that: the main shaft includes the screw rod of the tool shaft of being connected with the inner circle of the bearing that awaits measuring, the transmission shaft of connecting tool shaft and belt pulley and fixed tool shaft and transmission shaft, one of them the belt pulley cover is established on the transmission shaft, another one belt pulley connection is on the output shaft of motor, two the belt pulley passes through the belt and connects the transmission, the screw rod is worn to establish on the transmission shaft, and its one end constitutes spacing cooperation with the transmission shaft, and the other end realizes the fixed connection of tool shaft and transmission shaft with tool shaft threaded connection.

9. The testing device for the motor bearing according to claim 8, wherein: the transmission shaft is in plug-in fit with the tool shaft, the transmission shaft is provided with a conical hole for inserting the tool shaft, the tool shaft is provided with a conical part matched with the conical hole, and the conical part is embedded into the conical hole and then is in threaded connection with the screw rod.

10. A testing apparatus for a motor bearing according to claim 8 or 9, wherein: and insulating coatings are arranged on the outer surfaces of the tool shaft and the shaft shell.

Background

At present, new energy automobile is more and more, the motor bearing is the indispensable part among the new energy automobile, motor bearing among the new energy automobile need work under the electric current condition, and among the prior art, motor bearing performance and life under the electric current condition can't detect, can't verify whether the bearing can reach specified life under the electric current condition of passing through, and the temperature and the vibration change condition of bearing in the operation process, so the test device that can measure the performance of bearing under the electric current condition is urgently needed, provide safe and reliable motor bearing more for new energy automobile, promote new energy automobile's security performance and reliability.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a test device which can be used for detecting the temperature value and the vibration value of a motor bearing under the current condition.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a test device of motor bearing, is including examining test table, it is provided with drive assembly and bearing fixed subassembly to examine test table, bearing fixed subassembly includes axle shell, axial actuator and radial actuator, axial and radial actuator follow the axle shell respectively and radially set up to connect on the axle shell, be provided with the bearing installation cavity on the axle shell, form the station of awaiting measuring between drive assembly and the axle shell, it is provided with temperature sensor and vibration sensor on the station to await measuring, it still is provided with power supply module on the station to await measuring.

Among the above-mentioned technical scheme, power supply module is used for the bearing that awaits measuring circular telegram, make the bearing that awaits measuring move under the condition that the electric current passes through, the outer lane and the axle housing fixed connection of bearing that awaits measuring, the inner circle is connected with drive assembly, temperature value and vibration value when the bearing that awaits measuring moves under the regulation condition are measured through temperature sensor and vibration sensor, preferred temperature sensor adopts non-contact temperature sensor, like radiation temperature measuring instrument, detection effect is good, axial actuator and radial actuator's setting are for the true environment of simulation bearing during operation, axial actuator and radial actuator can provide axial load and radial load, make the precision that detects higher.

According to the further arrangement of the invention, the power supply assembly comprises a 24V power supply and a negative carbon brush and a positive carbon brush which are respectively connected with the outer ring and the inner ring of the bearing to be tested, and the negative electrode and the positive electrode of the power supply are respectively connected with the negative carbon brush and the positive carbon brush.

According to the technical scheme, the positive carbon brush is arranged on the bottom surface of the bearing installation cavity and abutted to the inner ring of the bearing to be tested, the negative carbon brush is arranged at the port of the bearing installation cavity and abutted to the outer ring of the bearing to be tested, the positive carbon brush and the negative carbon brush serve as contact ends of the positive electrode and the negative electrode of the power supply, and the electric conduction effect is good.

As a further arrangement of the invention, an elastic compensation structure is arranged on the positive carbon brush, a guide channel for mounting and guiding the positive carbon brush to move is arranged on the shaft shell, the guide channel is arranged along the axial direction of the shaft shell, an insulating coating is arranged on the inner wall of the guide channel, the elastic compensation structure comprises a spring channel arranged on the shaft shell, a pre-tightening spring arranged in the spring channel and a pre-tightening screw abutted against the pre-tightening spring, the spring channel and the guide channel are coaxially arranged and are mutually communicated, and the pre-tightening spring is abutted against the positive carbon brush.

Among the above-mentioned technical scheme, the inner circle can be rotary motion under drive assembly's drive, consequently, can have rotational friction between the inner circle of the bearing that awaits measuring and the anodal carbon brush, so the anodal carbon brush can wear and tear, the elasticity compensation structure is just for the wearing and tearing of compensation anodal carbon brush, pretension spring butt is on anodal carbon brush, make anodal carbon brush butt all the time on the inner circle of the bearing that awaits measuring, pretension spring is located between pretension screw and the anodal carbon brush, pretension screw fixes a position pretension spring, pretension screw still can be used to adjust the elastic force of pretension spring to anodal carbon brush, the setting of the insulating coating on the wire passageway inner wall is for the guarantee electric current can flow along only route, avoid the electric leakage, moreover, the steam.

As a further arrangement of the invention, a lead channel for a lead connected with the positive carbon brush and the positive electrode of the power supply to pass through is arranged on the shaft shell, and the lead channel is distributed along the radial direction of the shaft shell and is communicated with the guide channel.

Among the above-mentioned technical scheme, the setting shell of wire passageway is convenient for power supply's anodal and anodal carbon brush to be connected, wire passageway and direction passageway mutually perpendicular, and the wire passageway need have certain width, makes things convenient for the wire to follow the anodal carbon brush and removes, because of anodal carbon brush when the compensation wearing and tearing, can follow the axial displacement of direction passageway, the wire also can follow the removal this moment.

As a further arrangement of the invention, the shaft shell is provided with a temperature detection hole and a vibration detection hole which are used for inserting the temperature sensor and the vibration sensor and are communicated with the bearing installation cavity.

Among the above-mentioned technical scheme, temperature sensor and vibration sensor set up respectively in temperature detection hole and vibration detection hole, and during the bearing vibration that awaits measuring, can drive the axle housing and vibrate together, so detect the vibration value of axle housing also, and temperature sensor is close to the bearing that awaits measuring when detecting, and the precision is high, and it is convenient to detect.

As a further arrangement of the present invention, an axial force sensor is disposed on the axial actuator, and a radial force sensor is disposed on the radial actuator.

In the technical scheme, the axial force sensor and the radial force sensor can be used for detecting the verticality of the axial load and the radial load respectively, so that different working environments can be simulated, and the application range is wide.

The driving assembly comprises a main shaft for driving the inner ring of the bearing to be tested to rotate, a main shaft seat for mounting the main shaft and a motor for driving the main shaft to rotate, and the motor and the main shaft are driven by a belt and two belt pulleys.

Among the above-mentioned technical scheme, through belt and two belt pulley transmissions, transmission efficiency is high, simple structure, and is with low costs.

As a further arrangement of the invention, the main shaft comprises a tool shaft connected with the inner ring of the bearing to be tested, a transmission shaft connecting the tool shaft and the belt pulleys, and a screw rod fixing the tool shaft and the transmission shaft, wherein one of the belt pulleys is sleeved on the transmission shaft, the other belt pulley is connected with the output shaft of the motor, the two belt pulleys are connected and driven through a belt, the screw rod is arranged on the transmission shaft in a penetrating manner, one end of the screw rod is in limit fit with the transmission shaft, and the other end of the screw rod is in threaded connection with the tool shaft to realize the fixed connection of the tool shaft and the transmission shaft.

Among the above-mentioned technical scheme, the working shaft is connected with the inner circle of the bearing that awaits measuring, and the frock axle passes through screw rod fixed connection with the transmission shaft, sets up necessary bearing between axis of rotation and the spindle drum, avoids transmission shaft and spindle drum wearing and tearing each other, and the spindle drum is fixed on examining the test table, plays supporting role to the main shaft, simple structure, simple to operate.

According to the further arrangement of the tool shaft, the transmission shaft is in plug fit with the tool shaft, the transmission shaft is provided with a tapered hole into which the tool shaft is inserted, the tool shaft is provided with a tapered part matched with the tapered hole, and the tapered part is embedded into the tapered hole and then is in threaded connection with the screw rod.

In the technical scheme, the conical hole is preferably in a circular truncated cone shape, the outer peripheral surface of the conical part is attached to the inner peripheral surface of the conical hole, coaxiality of the tool shaft and the transmission shaft can be guaranteed during installation, and friction is reduced.

As a further arrangement of the invention, the outer surfaces of the tool shaft and the shaft housing are both provided with an insulating coating.

Among the above-mentioned technical scheme, preferred insulating coating set up in the frock axle and axle housing and the outer surface that the bearing that awaits measuring contacted can, guarantee that the electric current circulates along only route, detect the precision height.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a structural cross-sectional view of an embodiment of the present invention;

FIG. 2 is a partial cross-sectional structural view of an embodiment of the present invention;

fig. 3 is a cross-sectional view a-a of fig. 2.

Detailed Description

The specific embodiment of the invention is shown in fig. 1-3, and the testing device for the motor bearing comprises a detection table 1, wherein a driving assembly 2 and a bearing fixing assembly 3 are arranged on the detection table 1, the bearing fixing assembly 3 comprises a shaft shell 31, an axial actuator 32 and a radial actuator 33, the axial actuator 32 and the radial actuator 33 are respectively arranged along the axial direction and the radial direction of the shaft shell 31 and connected to the shaft shell 31, a bearing installation cavity 311 is arranged on the shaft shell 31, a station 01 to be tested is formed between the driving assembly 2 and the shaft shell 31, a temperature sensor and a vibration sensor are arranged on the station 01 to be tested, and a power supply assembly 4 is further arranged on the station 01 to be tested.

The power supply assembly 4 is used for electrifying the bearing 5 to be detected, so that the bearing 5 to be detected can run under the condition that current passes through, the outer ring 51 of the bearing 5 to be detected is fixedly connected with the shaft shell 31, the inner ring 52 is connected with the driving assembly 2, the temperature value and the vibration value of the bearing 5 to be detected when the bearing 5 to be detected runs under the specified condition are measured through the temperature sensor and the vibration sensor, the preferred temperature sensor adopts a non-contact temperature sensor, such as a radiation temperature measuring instrument, the detection effect is good, the axial actuator 32 and the radial actuator 33 are arranged to simulate the real environment when the bearing works, the axial actuator 32 and the radial actuator 33 can provide axial load and radial load, and the detection precision is higher.

The power supply assembly 4 comprises a 24V power supply 41, and a negative carbon brush 42 and a positive carbon brush 43 which are respectively connected with an outer ring 51 and an inner ring 52 of the bearing 5 to be tested, wherein the negative electrode and the positive electrode of the power supply 41 are respectively connected with the negative carbon brush 42 and the positive carbon brush 43. The positive carbon brush 43 is arranged on the bottom surface of the bearing installation cavity 311 and is abutted to the inner ring 52 of the bearing 5 to be tested, the negative carbon brush 42 is arranged at the port of the bearing installation cavity 311 and is abutted to the outer ring 51 of the bearing 5 to be tested, the positive carbon brush 43 and the negative carbon brush 42 serve as contact ends of the positive electrode and the negative electrode of the power supply 41, and the electric conduction effect is good.

The positive carbon brush 43 is provided with an elastic compensation structure 6, the shaft housing 31 is provided with a guide channel 312 for the positive carbon brush 43 to be mounted and guided to move, the guide channel 312 is arranged along the axial direction of the shaft housing 31, the inner wall of the guide channel 312 is provided with an insulating coating 3121, the elastic compensation structure 6 comprises a spring channel 61 arranged on the shaft housing 31, a pre-tightening spring 62 arranged in the spring channel 61 and a pre-tightening screw 63 abutted against the pre-tightening spring 62, the spring channel 61 and the guide channel 312 are coaxially arranged and are communicated with each other, and the pre-tightening spring 62 is abutted against the positive carbon brush 43. The inner ring 52 rotates under the driving of the driving assembly 2, so that rotational friction exists between the inner ring 52 of the bearing 5 to be tested and the anode carbon brush 43, the anode carbon brush 43 is abraded, the elastic compensation structure 6 is used for compensating abrasion of the anode carbon brush 43, the pre-tightening spring 62 abuts against the anode carbon brush 43, the anode carbon brush 43 always abuts against the inner ring 52 of the bearing 5 to be tested, the pre-tightening spring 62 is located between the pre-tightening screw 63 and the anode carbon brush 43, the pre-tightening screw 63 positions the pre-tightening spring 62, the pre-tightening screw 63 can also be used for adjusting the elastic force of the pre-tightening spring 62 on the anode carbon brush 43, the insulating coating 3121 on the inner wall of the wire channel 313 is used for ensuring that current can flow along a unique path, and electricity leakage is avoided, the structure is simple, and the operation is convenient.

The shaft housing 31 is provided with a lead channel 313 for a lead 411 connected with the positive carbon brush 43 and the positive electrode of the power supply 41 to pass through, and the lead channel 313 is distributed along the radial direction of the shaft housing 31 and is communicated with the guide channel 312. The arrangement shell of the wire channel 313 facilitates connection of the positive electrode of the power supply 41 and the positive carbon brush 43, the wire channel 313 is perpendicular to the guide channel 312, the wire channel 313 needs to have a certain width, the wire can move along with the positive carbon brush 43 conveniently, the positive carbon brush 43 can move along the axial direction of the guide channel 312 when compensating abrasion, and the wire can move along with the guide channel 312 at the moment.

The shaft housing 31 is provided with a temperature detection hole 314 and a vibration detection hole 315 into which the temperature sensor and the vibration sensor are inserted and which communicate with the bearing mounting cavity 311. Temperature sensor and vibration sensor set up respectively in temperature detection hole 314 and vibration detection hole 315, and during the bearing 5 vibration that awaits measuring, can drive axle housing 31 and vibrate together, so detect the vibration value of axle housing 31 also, and temperature sensor detects and is close to the bearing 5 that awaits measuring, and the precision is high, and it is convenient to detect.

The axial actuator 32 is provided with an axial force sensor 321, and the radial actuator 33 is provided with a radial force sensor 331. The axial force sensor 321 and the radial force sensor 331 can be used for detecting the verticality of the axial load and the radial load respectively, simulate different working environments, and have a wide application range.

The driving assembly 2 comprises a main shaft for driving the inner ring 52 of the bearing 5 to be tested to rotate, a main shaft seat 21 for installing the main shaft, and a motor 22 for driving the main shaft to rotate, wherein the motor 22 and the main shaft are driven by a belt and two belt pulleys 221. The transmission is realized through the belt and the two belt pulleys 221, so that the transmission efficiency is high, the structure is simple, and the cost is low.

The main shaft comprises a tool shaft 23 connected with an inner ring 52 of the bearing 5 to be tested, a transmission shaft 24 connected with the tool shaft 23 and a belt pulley 221, and a screw 25 for fixing the tool shaft 23 and the transmission shaft 24, wherein one of the screw 25 is sleeved on the transmission shaft 24 and the other one of the belt pulley 221 is connected to an output shaft of the motor 22, and the belt pulley 221 is connected with the transmission shaft through a belt, the screw 25 is arranged on the transmission shaft 24 in a penetrating manner, one end of the screw is in limit fit with the transmission shaft 24, and the other end of the screw is in threaded connection with the tool shaft 23 to realize the fixed connection of the tool shaft 23 and the transmission shaft 24. The working shaft is connected with the inner ring 52 of the bearing 5 to be tested, the tool shaft 23 is fixedly connected with the transmission shaft 24 through the screw rod 25, a necessary bearing is arranged between the rotating shaft and the spindle seat 21, the transmission shaft 24 and the spindle seat 21 are prevented from being abraded with each other, the spindle seat 21 is fixed on the detection table 1, a supporting effect is achieved on the spindle, the structure is simple, and the installation is convenient.

The transmission shaft 24 is in plug-in fit with the tool shaft 23, a tapered hole 241 for inserting the tool shaft 23 is formed in the transmission shaft 24, a tapered portion 231 matched with the tapered hole 241 is formed in the tool shaft 23, and the tapered portion 231 is embedded into the tapered hole 241 and then is in threaded connection with the screw 25. Preferably, the tapered hole 241 is formed in a truncated cone shape, and the outer circumferential surface of the tapered portion 231 is attached to the inner circumferential surface of the tapered hole 241, so that the coaxiality between the tool shaft 23 and the transmission shaft 24 can be ensured during mounting, and friction can be reduced.

The outer surfaces of the tool shaft 23 and the shaft housing 31 are also provided with an insulating coating 3121. The preferable insulating coating 3121 is set up in the outer surface that frock axle 23 and axle housing 31 and the bearing 5 contact that awaits measuring can, the guarantee electric current circulates along only route, and detection accuracy is high.

The motor 22 drives the transmission shaft 24 to rotate through two belt wheels and a belt, the transmission wheel drives the bearing 5 to be tested to rotate through the tool shaft 23, and the tool shaft 23 and the transmission shaft 24 are fixed into a whole through the tensioning screw 25. The axial force sensor 321 and the radial force sensor 331 respectively measure the magnitude of the axial load and the radial load by applying the axial load and the radial load to the axial actuator 32 and the radial actuator 33, respectively. A current load is applied to the bearing 5 to be measured by the power supply 41. And measuring the temperature value and the vibration value of the test bearing when the test bearing operates under the specified conditions through the temperature sensor and the vibration sensor. The bearing 5 to be tested is arranged in the shaft shell 31, the assembly formed by the bearing 5 to be tested and the shaft shell 31 is arranged on the tool shaft 23, the tool shaft 23 rotates to drive the inner ring 52 of the bearing 5 to be tested to rotate, so that the bearing 5 to be tested is driven to rotate, and the shaft shell 31 and the outer ring 51 of the bearing 5 to be tested are kept static under the action of radial load. The anode of the power supply 41 is connected with the anode carbon brush 43 and is communicated with the inner ring 52 of the bearing 5 to be tested, the cathode of the power supply 41 is connected with the cathode carbon brush 42 and is communicated with the outer ring 51 of the bearing 5 to be tested, and current flows to the outer ring 51 through the inner ring 52 and the steel ball so as to form a complete current loop. In order to obtain the current condition the same as the actual working condition, the contact surface of the tool shaft 23 and the inner ring 52 of the bearing 5 to be measured and the contact surface of the shaft shell 31 and the outer ring 51 of the bearing 5 to be measured are both sprayed with the insulating coating 3121. In order to compensate the abrasion of the positive carbon brush 43 in the bearing rotation process, the positive carbon brush 43 is pressed on the end face of the inner ring 52 of the bearing 5 to be measured through the pre-tightening screw 63 and the pre-tightening spring 62. The motor 22, the axial actuator 32, the radial actuator 33, etc. may be set and controlled by a controller, which will not be described in detail herein.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.