Detection device and detection method for external gear train of engine

Abstract

The invention relates to a device and method for detecting an engine external gear train, and the device comprises a rack, external gear train parts which are respectively disposed on the rack, an asynchronous motor disposed on the rack, and a belt pulley which is connected to an output shaft of the asynchronous motor. The belt pulley and the external gear train component are sequentially in transmission connection through a belt; wherein the belt pulley, the belt and the externally-hung gear train component are all kept in a qualified state, the to-be-tested component can replace one of the belt pulley, the belt and the externally-hung gear train component of the same type, and the asynchronous motor drives the belt pulley to rotate so as to drive the to-be-tested component and other components to rotate. Due to the fact that noise generated by the asynchronous motor in the working process is small, it is guaranteed that technicians can clearly hear abnormal sounds generated by the to-be-detected part, and therefore it is guaranteed that the technicians can accurately judge whether the to-be-detected part is a defective product or not.

Description

Technical Field

[0001] The present disclosure relates to the technical field of engine external gear train detection, and in particular, to a detection device and a detection method for an engine external gear train. Background Art

[0002] The engine of the vehicle can be equipped with an external gear train, and after-sales feedback on the external gear train is relatively high. In the relevant technology, the manufacturer needs to install each old part returned by after-sales service on the vehicle for testing. However, when assembling and testing the old parts with abnormal noise on the whole vehicle, it is not easy to distinguish the abnormal noise of the parts because the engine makes a loud noise during operation, which will cause the wrong judgment of the parts as defective products. Summary of the invention

[0003] The purpose of the present disclosure is to provide a detection device and a detection method for an engine external gear train, so as to at least partially solve the problems existing in the related art.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a detection device for an external gear train of an engine, comprising a frame and external gear train components respectively mounted on the frame, the detection device further comprising an asynchronous motor mounted on the frame, a pulley connected to an output shaft of the asynchronous motor, the pulley and the external gear train components being sequentially connected through a belt transmission; Among them, the pulley, the belt and the external wheel system components are all kept in a qualified state, the component to be tested can replace one of the same type of the pulley, the belt and the external wheel system components, and the asynchronous motor drives the pulley to rotate, so as to drive the component to be tested and other components to rotate.

[0005] Optionally, the external gear train component includes at least one of a tensioning pulley, a generator, a water pump wheel, and a compressor, and the belt is respectively wound around the outer circumference of the pulley, the rotating shaft of the compressor, and the rotating shaft of the generator; The water pump wheel and the tension wheel are in contact with outer sides of the belt, respectively.

[0006] Optionally, the detection device further comprises a battery, and a positive electrode and a negative electrode of the battery are respectively connected to a positive electrode and a negative electrode of the generator via wires.

[0007] Optionally, at least one of the external wheel train components is in plurality and is respectively connected to the belt drive; or, there are multiple generators and multiple batteries, respectively, and the multiple batteries are connected to the multiple generators in a one-to-one correspondence.

[0008] Optionally, a circuit breaker is installed on the wire connecting the positive electrode of the battery and the positive electrode of the generator.

[0009] Optionally, the detection device includes a detection element for obtaining the noise value of the component to be tested.

[0010] Optionally, the asynchronous motor is a low-noise asynchronous motor.

[0011] According to a second aspect of an embodiment of the present disclosure, a method for detecting an external gear train of an engine is provided, wherein the external gear train of the engine is detected by using the detection device for the external gear train of the engine according to any one of the above embodiments, and the detection method comprises: Replace the tested component with one of the same type of the belt, the pulley, and the external wheel system component; Controlling the asynchronous motor to drive the pulley to rotate, driving the component to be tested and other components to rotate, and obtaining the noise value of the component to be tested; When the noise value is less than the preset value, the component to be tested is qualified; When the noise value is greater than or equal to the preset value, the component to be tested is unqualified.

[0012] Optionally, the wheel train component includes a generator, and the detection device includes a battery connected to the generator; When the displayed voltage of the battery is 12V, the generator is in a non-working state; When the displayed voltage of the battery is 14V, the generator is in working state.

[0013] Optionally, the number of the components to be tested is N and they are of different types, the number of the external gear train components is N and they correspond one-to-one to the types of the components to be tested, and the detection method includes: N different types of the components to be tested are sequentially replaced with one of the same type of the external gear train components on the rack, and noise values ​​of the N components to be tested are respectively obtained; Among them, the noise values ​​of the N components to be tested correspond to different preset values ​​respectively.

[0014] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: In the detection device provided by the present invention, the test process originally conducted on the whole vehicle is adjusted to a separately arranged detection device. At the same time, the detection device can simulate the state of each component on the whole vehicle under normal driving conditions, and maintain the same effect as the test on the whole vehicle. When conducting the test, ensure that the external wheel system components on the frame are all in a qualified state, replace the part to be tested with one of the same type of pulleys, belts and external wheel system components, start the asynchronous motor, so that the pulley can drive the belt to rotate, thereby rotating the part to be tested and the remaining parts. Because the asynchronous motor emits relatively little noise during operation, it is ensured that the technicians can clearly hear the abnormal noise emitted by the part to be tested, thereby ensuring that the technicians can more accurately judge whether the part to be tested is a defective product.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The figure is a front view of a detection device for an external gear train of an engine according to an exemplary embodiment of the present disclosure.

[0017] Figure 2 The figure is a side view of a detection device for an external gear train of an engine according to an exemplary embodiment of the present disclosure.

[0018] Figure 3 The figure is a flow chart of a method for detecting an external gear train of an engine according to an exemplary embodiment of the present disclosure.

[0019] Description of Reference Numerals 1. Frame; 10. Tensioner; 20. Pulley; 30. Generator; 40. Belt; 50. Water pump wheel; 60. Compressor; 70. Asynchronous motor; 80. Spacer. DETAILED DESCRIPTION

[0020] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0021] In this disclosure, unless otherwise stated, directional words such as "bottom" are used for the convenience of description and are defined according to the drawing direction of the corresponding drawings, and "inside" and "outside" are defined according to the contours of the corresponding parts. Terms such as "first" and "second" used in this disclosure are used to distinguish one element from another and do not have order and importance. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0022] In the related art, after-sales recycled old parts, such as tensioners, generators, water pump wheels, belts, pulleys, etc., need to be loaded onto vehicles for testing to determine the responsibility. In addition to the problem of easy misjudgment mentioned in the background technology section, when testing old parts, it is also necessary to simulate tests under adverse working conditions, idle tests, and runway tests, etc., which will cause waste of fuel. For example, if the compressor makes an abnormal sound, the refrigerant should be released before installation, and then the installation should be carried out. If the water pump wheel makes an abnormal sound, the coolant should be released before replacing the water pump wheel, and then the antifreeze should be added, which increases the waste cost. In addition, the external wheel system components of the engine are close to the frame at the front end of the engine and cannot be operated. The vehicle needs to be lifted onto a lift to remove the engine lifting lugs for replacement and testing. There are certain safety hazards when using a lift.

[0023] To solve the above problems, see Figure 1 and Figure 2 The embodiment of the present disclosure provides a detection device for an external gear train of an engine, the detection device comprises a frame 1 and external gear train components respectively mounted on the frame 1. The detection device may also comprise an asynchronous motor 70 mounted on the frame 1, a pulley 20 connected to the output shaft of the asynchronous motor 70, and the pulley 20 and the external gear train components may be sequentially connected by a belt 40. Among them, the pulley 20, the belt 40 and the external gear train components may all maintain a qualified state, the component to be tested may replace one of the same type among the pulley 20, the belt 40 and the external gear train components, and the asynchronous motor 70 may drive the pulley 20 to rotate, so as to drive the component to be tested and the remaining components to rotate. The asynchronous motor 70 may replace the engine as a power source to drive the external gear train components of the engine to rotate, and the noise generated by the asynchronous motor 70 during operation is less than the noise generated by the engine, so as to ensure that the technicians can clearly hear the abnormal noise emitted by the component to be tested during operation, and can quickly and accurately find the fault point, reduce the operation time, thereby ensuring that the responsibility for the abnormal component is relatively clear, and avoiding the high after-sales compensation cost due to misjudgment. Since there is no need to install the engine external wheel system returned from after-sales service on the vehicle for testing, the safety hazards caused by multiple use of the lift during the installation and testing process are avoided, and the cost of the entire vehicle during the installation and testing is reduced.

[0024] It should be noted that the qualified state of the pulley 20, the belt 40 and the external wheel train components refers to the state in which the above components are normally installed on the vehicle, which is consistent with the test on the whole vehicle. Those skilled in the art can distinguish whether the components to be tested make abnormal noises based on experience.

[0025] In the detection device provided by the present invention, the test process originally carried out on the whole vehicle is adjusted to a separately arranged detection device. At the same time, the detection device can simulate the state of each component on the whole vehicle under normal driving conditions, and maintain the same effect as the test on the whole vehicle. When conducting the test, ensure that the external wheel system components on the frame 1 are all in a qualified state, replace the pulley 20, the belt 40 and one of the same type of external wheel system components with the part to be tested, start the asynchronous motor 70, so that the pulley 20 can drive the belt 40 to rotate, thereby rotating the part to be tested and the remaining parts. Because the noise emitted by the asynchronous motor 70 during operation is relatively small, it is ensured that the technician can clearly hear the abnormal sound emitted by the part to be tested, thereby ensuring that the technician can more accurately judge whether the part to be tested is a defective product.

[0026] In one embodiment, see Figure 1 , the external wheel train component may include at least one of the tension wheel 10, the generator 30, the water pump wheel 50, and the compressor 60, and the belt 40 may be respectively wound around the outer periphery of the rotating shaft of the pulley 20, the compressor 60, and the rotating shaft of the generator 30. The water pump wheel 50 and the tension wheel 10 may contact the outer side of the belt 40 respectively. In this embodiment, the external wheel train component may include the tension wheel 10, the generator 30, the water pump wheel 50, and the compressor 60. The relative positions of the tension wheel 10, the generator 30, the water pump wheel 50, and the compressor 60 on the frame 1 remain unchanged from the installation position on the vehicle, simulating their working state on the vehicle of this model. Workers can adjust the relative positions of the tension wheel 10, the generator 30, the water pump wheel 50, and the compressor 60 on the frame 1 according to different vehicle models. Of course, in other embodiments, the external wheel train component may only include the tension wheel 10, the generator 30, the water pump wheel 50, or the compressor 60. The worker can adjust and select the types of external wheel train components that can be included on the frame 1 according to the types of external wheel train components included on the vehicle.

[0027] For the convenience of description, the external wheel system that needs to be returned to the factory for inspection is called A series components, and the external wheel system components originally installed on the frame 1 are called B series components. For example, when the A1 tensioner needs to be inspected, the worker can replace the B1 tensioner 10 on the frame 1, start the asynchronous motor 70, and make the belt 40 drive the A1 tensioner and other components to rotate. At this time, the worker can listen carefully to whether the A1 tensioner makes an abnormal sound. If no abnormal sound occurs, it can be indicated that the abnormality of the external wheel system on the vehicle has nothing to do with the A1 tensioner. On the contrary, if an abnormal sound is heard, it can be preliminarily determined that the abnormal part of the external wheel system on the vehicle comes from the A1 tensioner.

[0028] In one embodiment, see Figure 1 The detection device may also include a battery. The positive and negative electrodes of the battery may be connected to the positive and negative electrodes of the generator 30 respectively through wires. Workers may use a voltmeter to measure the voltage between the positive and negative electrodes of the battery, and indirectly determine whether the generator 30 is abnormal based on the measured voltage value. This determination method is relatively simple and convenient.

[0029] In one embodiment, see Figure 1 , at least one of the external wheel train components can be multiple in number, and can be respectively connected to the belt 40 for transmission; or, the generator 30 and the battery can be multiple in number, and the multiple batteries can be connected to the multiple generators 30 in a one-to-one correspondence.

[0030] For example, four B2 water pumps can be installed on rack 1, and workers can replace the four B2 water pumps on rack 1 with four A2 water pumps to be tested. If the water pump makes an abnormal sound after the asynchronous motor 70 is started, the worker can remove the three A2 water pumps on rack 1 and make the asynchronous motor 70 drive the remaining A2 water pumps to work. The worker judges whether the water pump makes an abnormal sound based on experience. Similarly, the worker can test the other three A2 water pumps in batches to see if they are abnormal. If the four A2 water pumps do not make abnormal sounds during the test, it proves that the four A2 water pumps are normal, which improves the detection speed of the external gear system.

[0031] In one embodiment, a circuit breaker may be installed on the wire connecting the positive electrode of the battery and the positive electrode of the generator 30. If an abnormality occurs in the generator 30, workers may disconnect the connection between the battery and the generator 30 through the circuit breaker to avoid damage to the battery.

[0032] In one embodiment, the detection device may include a detection element for obtaining the noise value of the component to be tested, and the detection element may be a decibel meter or a handheld noise meter. The use of the detection element can reduce the reliance on the work experience of the workers during the test. The detection element can assist the staff in determining the noise value of the component to be tested, and the staff compares the measured value with the normal value to accurately determine whether the component to be tested is abnormal.

[0033] In one embodiment, see Figure 1 and Figure 2 The asynchronous motor 70 can be a low-noise asynchronous motor. The decibel value of a low-noise asynchronous motor is usually below 50-60 decibels, which prevents the noise emitted by the asynchronous motor during operation from interfering with the abnormal sound emitted by the components to be tested, ensuring that workers can accurately determine whether the components to be tested are good. Workers can adjust the speed and torque output of the asynchronous motor 70 to meet the testing requirements of the external wheel system on different vehicles.

[0034] In one embodiment, see Figure 2The detection device may further include a plurality of pads 80 , on which the asynchronous motor 70 is mounted to ensure the heat dissipation effect at the bottom of the asynchronous motor 70 .

[0035] See also Figures 1 to 3 According to a second aspect of an embodiment of the present disclosure, a method for detecting an external gear train of an engine is provided. The external gear train of an engine is detected by using a detection device for an external gear train of an engine according to any of the above embodiments. The detection method may include: Step S110 , replacing the component to be tested with one of the belt 40 , the pulley 20 , and the external gear train component of the same type.

[0036] Step S130, controlling the asynchronous motor 70 to drive the pulley 20 to rotate, driving the component to be tested and other components to rotate, and obtaining the noise value of the component to be tested.

[0037] Step S150, when the noise value is less than the preset value, the component to be tested is qualified; when the noise value is greater than or equal to the preset value, the component to be tested is unqualified.

[0038] The detection method can have all the beneficial effects of the above-mentioned detection device for the engine external gear train, which will not be described in detail here.

[0039] In one embodiment, see Figure 1 and Figure 3 The wheel train component may include a generator 30, and the detection device may include a battery connected to the generator 30; when the displayed voltage of the battery is 12V, the generator 30 is in a non-working state; when the displayed voltage of the battery is 14V, the generator 30 is in a working state.

[0040] It is understandable that since the voltage generated by the generator 30 is unstable, directly measuring the voltage generated by the generator 30 with a voltmeter may easily damage the voltmeter. The battery can output voltage stably to avoid damage to the voltmeter.

[0041] In one embodiment, there are N parts to be tested and they are of different types, there are N external wheel train components and they correspond one to one with the types of the parts to be tested, and the detection method includes: replacing N different types of parts to be tested with one of the same type of external wheel train components on the frame 1 in turn, and obtaining the noise values ​​of the N parts to be tested respectively. Among them, the noise values ​​of the N parts to be tested correspond to different preset values ​​respectively, and the preset value refers to the noise range of the parts to be tested under normal operation. Through a separate set of detection devices, N different types of parts to be tested that are recycled after sales can be detected in turn, reducing costs and improving detection efficiency. By adjusting the speed and torque output of the asynchronous motor 70, as well as the relative position relationship of each component in the external wheel train component, the detection device can be applied to the detection of external wheel train components on different vehicle models, increasing versatility.

[0042] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0044] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A detection device for an engine external gear train, characterized in that: The detection device comprises a frame and external gear train components respectively mounted on the frame, wherein the detection device further comprises an asynchronous motor mounted on the frame and a pulley connected to an output shaft of the asynchronous motor, wherein the pulley and the external gear train components are sequentially connected through a belt transmission; Among them, the pulley, the belt and the external wheel system components are all kept in a qualified state, the component to be tested can replace one of the same type of the pulley, the belt and the external wheel system components, and the asynchronous motor drives the pulley to rotate, so as to drive the component to be tested and other components to rotate.

2. The detection device according to claim 1, characterized in that: The external gear train component includes at least one of a tension pulley, a generator, a water pump wheel, and a compressor, and the belt is respectively wound around the outer circumference of the pulley, the rotating shaft of the compressor, and the rotating shaft of the generator; The water pump wheel and the tension wheel are in contact with outer sides of the belt, respectively.

3. The detection device according to claim 2, characterized in that: The detection device also includes a battery, and the positive electrode and the negative electrode of the battery are connected to the positive electrode and the negative electrode of the generator through wires respectively.

4. The detection device according to claim 3, characterized in that: At least one of the external wheel train components is in multiple number and is respectively connected to the belt drive; or, there are multiple generators and multiple batteries, respectively, and the multiple batteries are connected to the multiple generators in a one-to-one correspondence.

5. The detection device according to claim 3, characterized in that: A circuit breaker is installed on the wire connecting the positive electrode of the battery and the positive electrode of the generator.

6. The detection device according to claim 1, characterized in that: The detection device includes a detection element for obtaining the noise value of the component to be tested.

7. The detection device according to claim 1, characterized in that: The asynchronous motor is a low-noise asynchronous motor.

8. A method for detecting an external gear train of an engine, characterized in that: The engine external gear train is detected by using the engine external gear train detection device according to any one of claims 1 to 7, and the detection method comprises: Replace the tested component with one of the same type of the belt, the pulley, and the external wheel system component; Controlling the asynchronous motor to drive the pulley to rotate, driving the component to be tested and other components to rotate, and obtaining the noise value of the component to be tested; When the noise value is less than the preset value, the component to be tested is qualified; When the noise value is greater than or equal to the preset value, the component to be tested is unqualified.

9. The detection method according to claim 8, characterized in that: The wheel train component includes a generator, and the detection device includes a battery connected to the generator; When the displayed voltage of the battery is 12V, the generator is in a non-working state; When the displayed voltage of the battery is 14V, the generator is in working state.

10. The detection method according to claim 8, characterized in that: The number of the components to be tested is N and they are of different types, the number of the external gear train components is N and they correspond one to one with the types of the components to be tested, and the detection method includes: N different types of the components to be tested are sequentially replaced with one of the same type of the external gear train components on the rack, and noise values ​​of the N components to be tested are respectively obtained; Among them, the noise values ​​of the N components to be tested correspond to different preset values ​​respectively.

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