A testing device and method for a children's vehicle speed reducer

Abstract

This invention relates to the field of speed reducer testing, and more particularly to a testing device and method for a children's vehicle speed reducer. The device includes: a testing platform with a positioning component at its top for positioning the speed reducer; a first sliding frame driven by a first electric cylinder and sliding on the top of the testing platform, with a contact component on its side wall for contacting the speed reducer's housing; and a vibration sensor mounted on the contact component for detecting vibration signals from the shielding cover. This invention, by incorporating a vibration sensor, a sound sensor, and a nozzle, allows the controller to spray different colored markings onto the speed reducer's output shaft based on the vibration and sound signals. This facilitates quick location of abnormal worm gear positions by following the extension lines of the color markings. Furthermore, the combined detection of meshing abnormalities based on sound and vibration signals improves testing accuracy.

Description

Technical Field

[0001] This invention relates to the field of speed reducer testing, and more particularly to a speed reducer testing device and testing method for children's vehicles. Background Technology

[0002] As a crucial component of children's vehicles, the speed reducer is an independent part consisting of gear drives, worm drives, or gear-worm drives enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between the driving component and the working machine. Since children's vehicles are primarily used by children, the speed reducer must possess a high degree of safety and reliability to ensure no malfunctions occur during use and to prevent injury to children. Therefore, the speed reducer needs to be tested during manufacturing, such as checking whether the worm gear meshing inside the speed reducer is normal.

[0003] Existing technologies commonly use noise detection devices to detect the meshing state of the worm gear in a speed reducer. For example, utility model patent with publication number CN202092871 U discloses a noise detection device for a rear axle main reducer assembly of an automobile. It includes a vibration sensor and a control cabinet that processes, displays, and stores vibration information through operating software. It also includes a vertical power source connected to the input shaft of the rear axle main reducer and an axle housing that mounts the rear axle main reducer on a horizontal base. The vibration sensor is a horizontal and vertical vibration sensor installed on the rear axle main reducer.

[0004] The above case has the following defects: After inspecting the reducer and determining whether the worm gear meshing inside the reducer is abnormal, the abnormal reducer needs to be disassembled and the abnormal meshing parts need to be re-machined. Although the above-mentioned inspection equipment can detect whether the worm gear meshing inside the reducer is abnormal, it does not mark the abnormal parts, thus increasing the difficulty of subsequent processing.

[0005] To address these issues, this invention proposes a testing device and method for children's vehicle speed reducers. Summary of the Invention

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a children's vehicle speed reducer testing device, comprising:

[0007] A testing platform, the top of which is provided with a positioning component for positioning the speed reducer;

[0008] The first sliding frame is driven by the first electric cylinder and is slidably mounted on the top of the testing table. The side wall of the first sliding frame is provided with a contact component for contacting the housing of the reducer.

[0009] A vibration sensor, which is mounted on the contact component, is used to detect the vibration signal of the shielding cover;

[0010] The second sliding frame is driven by the second electric cylinder and is slidably mounted on the top of the testing platform. A nozzle is provided on the side wall of the second sliding frame corresponding to the meshing position of the worm gear in the reducer.

[0011] The controller is based on vibration signals. When the vibration signals are abnormal, the controller controls the nozzle to spray marking liquid onto the surface of the reducer output shaft.

[0012] Preferably, the contact component includes:

[0013] The connecting rod is fixedly connected to the side wall of the first sliding frame;

[0014] A shielding cover is fixed to the end of the connecting rod. A sound sensor is installed inside the shielding cover. The sound sensor is used to detect the sound signal when the worm gear meshes in the reducer.

[0015] The vibration sensor is mounted on the outer wall of the shielding cover;

[0016] The controller is based on sound signals. When the sound signal is abnormal, the controller controls the nozzle to spray marking liquid onto the surface of the reducer output shaft.

[0017] Preferred options also include:

[0018] Mounting bracket, which is fixedly connected to the side wall of the second sliding bracket;

[0019] An annular fixing plate is rotatably connected to the side wall of the mounting frame at the position corresponding to the output shaft of the reducer, and an annular magnetic scale is fixedly connected to the outer side wall of the annular fixing plate.

[0020] A connecting component that enables the annular fixed plate to rotate synchronously with the output shaft of the reducer;

[0021] A reading head is fixedly connected to the side wall of the mounting frame at the meshing position of the worm gear inside the reducer. The reading head is used to record the position information of the annular magnetic scale in real time.

[0022] A timer, fixed on a mounting bracket, starts counting when the reducer is started;

[0023] The controller calculates and adjusts the speed of the reducer output shaft based on the time information from the timer and the position information recorded by the reading head.

[0024] Preferred options also include:

[0025] An arc-shaped fixing bracket is fixedly connected to the end of the mounting bracket;

[0026] An arc-shaped track is provided on an arc-shaped fixed frame, and the arc-shaped track is concentric with the output shaft of the reducer;

[0027] An arc-shaped mounting plate is slidably connected to the inner wall of an arc-shaped track, and the nozzle is fixedly connected to the arc-shaped mounting plate.

[0028] A position adjustment component is used to adjust the position of the arc-shaped mounting plate on the arc-shaped track to compensate for errors in the marked position.

[0029] Preferably, the position adjustment component includes:

[0030] Two arc-shaped racks are symmetrically and fixedly connected to the side wall of the arc-shaped mounting plate;

[0031] Two gears, each of which meshes with two arc-shaped racks, share the same rotating shaft, which passes through the outer wall of the arc-shaped fixing frame and is rotatably connected to the arc-shaped fixing frame;

[0032] The self-locking motor is fixedly connected to the outer wall of the arc-shaped fixing frame, and the output shaft of the self-locking motor is fixedly connected to the rotating shaft.

[0033] Preferably, the connecting component includes:

[0034] Two arc-shaped clamps are symmetrically and slidably connected to the end sidewall of the annular fixed plate, and a spring is fixedly connected between the arc-shaped clamps and the annular fixed plate;

[0035] Two friction pads are fixedly connected to the inner wall of the arc-shaped clamp.

[0036] Four electromagnets are symmetrically and fixedly connected in the grooves on the side wall of the arc-shaped clamping plate.

[0037] Preferably, the nozzle is flat, and the long side of the nozzle is parallel to the output shaft of the reducer.

[0038] Preferably, the nozzle has a built-in first nozzle and a second nozzle, and the top of the nozzle is fixed with a first pipe communicating with the first nozzle and a second pipe communicating with the second nozzle. The first pipe is connected to an external first liquid pump pipeline, and the second pipe is connected to an external second liquid pump pipeline.

[0039] To address the above problems, this invention also proposes a method for testing the speed reducer of a children's vehicle, comprising the following steps:

[0040] S1: Calibrate the position of the nozzle;

[0041] S2: Place the reducer on the testing platform and position it using the positioning components;

[0042] S3: Detects internal sound signals and vibration signals of the reducer housing using sound and vibration sensors;

[0043] S4: Based on sound signals and vibration information, the controller controls the nozzles to spray different colored markings on the output shaft of the reducer when an abnormality occurs.

[0044] S5: Determine the abnormal area of ​​the worm gear based on the extension line of the mark.

[0045] Preferably, step S1 specifically includes the following steps:

[0046] S101: Reads the position information of the ring magnetic scale in real time through the reading head and feeds it back to the display screen of the peripheral device;

[0047] S102: The peripheral display shows different colors at the corresponding location information based on the sound signal and vibration signal; red is displayed for abnormalities and green is displayed for normalities.

[0048] S103: Based on sound signals and vibration information, the controller controls the nozzles to spray different colored markings on the output shaft of the reducer when an abnormality occurs.

[0049] S104: Adjust the nozzle spray position using the position adjustment component so that the extension line of the mark on the output shaft of the reducer is aligned with the position of the red mark on the external display screen.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] I. This invention, by setting up a vibration sensor, a sound sensor, and a nozzle, allows the controller to control the nozzle to spray different colored marks onto the output shaft of the reducer based on vibration and sound signals. This facilitates the quick location of abnormal worm gear positions by following the extension lines of the color marks. Simultaneously, by jointly detecting meshing abnormalities based on sound and vibration signals, the detection accuracy is improved.

[0052] Second, by setting up an annular magnetic scale, a reading head, and a timer, when the output shaft of the reducer rotates, the arc-shaped fixed plate drives the annular magnetic scale to rotate, and the timer starts timing. The controller calculates and adjusts the speed of the reducer output shaft based on the position information recorded by the timer and the reading head, ensuring that the output shaft of the reducer can maintain the same speed every time the reducer is tested, thereby helping to reduce the detection error.

[0053] III. This invention, by setting up an arc-shaped track and a position adjustment component, allows the output shaft of the reducer to rotate only one revolution when the reducer is started. During this process, the position information of the annular magnetic scale is read in real time by the reading head and fed back to the display screen of the external device. At the same time, the sound sensor and vibration sensor detect the sound and vibration signals inside the reducer in real time. When an abnormality occurs, a red mark will be displayed at the corresponding position information on the external device display screen, and a green mark will be displayed otherwise. After the detection is completed, it is observed whether the extension line of the mark on the output shaft of the reducer corresponds to the target position of the annular magnetic scale. The target position is the position of the red mark on the external device display screen. If the mark is offset, the position adjustment component causes the arc-shaped mounting plate to move the nozzle, so that the extension line of the mark on the output shaft of the reducer is consistent with the target position, thereby reducing the error in determining the abnormal position of the worm gear. Attached Figure Description

[0054] Figure 1 This is an overall structural diagram of the detection device of the present invention;

[0055] Figure 2 This is a schematic diagram showing the connection between the second sliding frame and the mounting frame of the present invention;

[0056] Figure 3 This is a schematic diagram showing the connection between the first sliding frame and the shielding cover of the present invention;

[0057] Figure 4 This is a schematic diagram showing the connection between the mounting bracket and the arc-shaped fixing bracket in this invention;

[0058] Figure 5 This is a schematic diagram of the connection between the arc-shaped rack and the gear in this invention;

[0059] Figure 6 This is a cross-sectional view of the nozzle of the present invention;

[0060] Figure 7 This is a schematic diagram showing the connection between the annular magnetic scale and the arc-shaped fixing plate in this invention;

[0061] Figure 8 This is a flowchart of the speed reducer testing method in this invention;

[0062] Figure 9 This is a flowchart of the nozzle calibration method in this invention.

[0063] In the diagram: 1. Detection platform; 2. Controller; 3. Fixing base; 4. Hydraulic cylinder; 5. Positioning plate; 6. Reducer; 7. First sliding frame; 8. First electric cylinder; 9. Connecting rod; 10. Shielding cover; 11. Sound sensor; 12. Vibration sensor; 13. Elastic sealing gasket; 14. Second sliding frame; 15. Second electric cylinder; 16. Nozzle; 16. First nozzle 1601; 1602. First pipe 1603; Second pipe 1604; Mounting bracket; 17. Annular fixing plate; 18. Annular magnetic grating ruler; 19. Reading head; 20. Timer; 21. Arc-shaped clamp; 22. Spring; 23. Friction pad; 24. Electromagnet; 25. Arc-shaped fixing bracket; 26. Arc-shaped track; 27. Arc-shaped mounting plate; 28. Arc-shaped rack; 29. ​​Gear; 30. Self-locking motor; 31. Detailed Implementation

[0064] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0065] like Figures 1 to 7 The device shown is a test equipment for a children's vehicle speed reducer, comprising:

[0066] Testing table 1, with a positioning component at the top of testing table 1, the positioning component is used to position the reducer 6;

[0067] The first sliding frame 7 is slidably connected to the top of the testing table 1. The side wall of the first sliding frame 7 is provided with a contact component, which is used to contact the housing of the reducer 6.

[0068] The first electric cylinder 8 is fixed on the testing table 1, and the telescopic rod of the first electric cylinder 8 is fixedly connected to the side wall of the first sliding frame 7.

[0069] Vibration sensor 12 is disposed on the contact component and is used to detect the vibration signal of the shield 10;

[0070] The second sliding frame 14 is slidably connected to the top of the detection table 1 at the position of the output shaft of the reducer 6. The side wall of the second sliding frame 14 is provided with a nozzle 16 at the meshing position of the worm gear inside the reducer 6.

[0071] The second electric cylinder 15 is fixed on the testing table 1, and the telescopic rod of the second electric cylinder 15 is fixedly connected to the side wall of the second sliding frame 14.

[0072] Controller 2, based on vibration signals, controls nozzle 16 to spray marking liquid onto the surface of the output shaft of reducer 6 when the vibration signal is abnormal.

[0073] Specifically, in the existing technology, after inspecting the reducer 6 and determining whether the worm gear meshing inside the reducer 6 is abnormal, the abnormal reducer 6 needs to be disassembled, and the abnormal meshing parts need to be re-machined. Although the existing inspection equipment can detect whether the worm gear meshing inside the reducer 6 is abnormal, it does not mark the abnormal parts, thus increasing the difficulty of subsequent processing. This technical solution can solve the above problems, and the specific operation is as follows:

[0074] First, place the reducer 6 to be tested on the test table 1. Position the reducer 6 using the positioning components on the test table 1. Then, start the first electric cylinder 8 and the second electric cylinder 15. The telescopic rod of the first electric cylinder 8 pushes the first sliding frame 7. The first sliding frame 7 drives the contact component to approach the outer wall of the reducer 6 and make contact with the outer wall of the reducer 6. The telescopic rod of the second electric cylinder 15 pushes the second sliding frame 14. The second sliding frame 14 drives the nozzle 16 to move closer to the output shaft surface of the reducer 6.

[0075] Then connect the reducer 6 to the external power supply (not shown in the figure), so that the worm inside the reducer 6 rotates slowly. Under the action of the worm gear meshing, the worm gear rotates, thereby causing the output shaft of the reducer 6 to rotate slowly.

[0076] Next, the vibration signal of the contact component is detected by the vibration sensor 12 (since the vibration component is in contact with the reducer, the contact component vibrates when the reducer 6 vibrates), and the vibration signal is transmitted to the controller 2. The controller 2 compares the vibration signal detected by the vibration sensor 12 with the sample vibration signal in real time. When there is a significant difference between the detected vibration signal and the sample vibration signal, for example, the RMS value of the vibration signal frequency band exceeds the calibration value by 120%, the controller 2 controls the nozzle 16 to spray the marking liquid onto the surface of the output shaft of the reducer 6.

[0077] After the test is completed, the reducer 6 is removed from the test bench 1. If there is a color mark on the output shaft, the housing of the reducer 6 is disassembled. Then, the abnormal position of the worm gear is found by drawing a line mark along the extension line of the color mark. After the worm gear is disassembled, the abnormal part of the worm gear can be quickly found according to the marked position, which is convenient for repair and ensures that the reducer 6 has a high degree of safety and reliability.

[0078] As a further embodiment of the present invention, the contact component includes:

[0079] Connecting rod 9 is fixedly connected to the side wall of the first sliding frame 7;

[0080] A shielding cover 10 is fixed to the end of the connecting rod 9. A sound sensor 11 is installed inside the shielding cover 10. The sound sensor 11 is used to detect the sound signal when the worm gear meshes inside the reducer 6.

[0081] Vibration sensor 12 is mounted on the outer wall of shield 10;

[0082] The controller 2 is based on the sound signal. When the sound signal is abnormal, the controller 2 controls the nozzle 16 to spray the marking liquid onto the surface of the output shaft of the reducer 6.

[0083] Specifically, by setting a sound sensor 11 to detect the sound of the worm gear meshing inside the reducer 6, the controller 2 compares the sound signal detected by the sound sensor 11 with the sample sound signal in real time. When there is a significant difference between the detected sound signal and the sample sound signal (for example, the difference between the detected sound signal and the sample sound signal exceeds 120%), the controller 2 controls the nozzle 16 to spray a different color of marking liquid onto the surface of the output shaft of the reducer 6. This facilitates the differentiation between sound signals and vibration signals, and improves the detection accuracy by jointly detecting meshing abnormalities based on the sound signal and vibration signal.

[0084] It should be noted that the data for the sample vibration signal and sample sound signal were obtained through testing of standard parts.

[0085] Furthermore, an elastic sealing gasket 13 is fixedly connected to the end of the shield 10 to ensure that the shield 10 is in full contact with the housing of the reducer 6, thereby further eliminating interference from external noise.

[0086] As one optional implementation of the positioning component, the positioning component includes:

[0087] Four fixed seats 3 are fixed to the top of the test platform 1, corresponding to the four sides of the reducer 6 housing.

[0088] Four hydraulic cylinders 4 are fixed on four fixed seats 3 respectively. The ends of the telescopic rods of the four hydraulic cylinders 4 are fixedly connected to positioning plates 5. Two first sliding rods are symmetrically fixedly connected to the side walls of the positioning plates 5. The first sliding rods are slidably connected to the fixed seats 3.

[0089] Specifically, by setting up four hydraulic cylinders 4 and positioning plates 5, the reducer 6 is positioned to prevent it from shifting position when it starts. On the other hand, it ensures that the reducer 6 is in the same position on the test bench 1, so that the shield 10 is in the same position on the reducer 6 housing each time the reducer 6 is tested, which helps to reduce test errors.

[0090] It should be noted that: the sound sensor 11 can be the TR-2000 series, which has built-in low-pass filtering and dynamic threshold triggering functions, automatically filters high-frequency noise and records valid signals; the vibration sensor 12 can be the CMSS2100T model; and the controller 2 can be the Siemens S7-1500 series.

[0091] It should also be noted that the nozzle 16 is flat and has a first nozzle 1601 and a second nozzle 1602 built in. The top of the nozzle 16 is fixed with a first pipe 1603 that communicates with the first nozzle 1601 and a second pipe 1604 that communicates with the second nozzle 1602. The first pipe 1603 is connected to the external first liquid pump pipeline, and the second pipe 1604 is connected to the external second liquid pump pipeline. The long side of the nozzle 16 is parallel to the output shaft of the reducer 6. (For the sake of simplicity, the first liquid pump and the second liquid pump are not shown in the figure).

[0092] Specifically, when the vibration signal is abnormal, the controller 2 activates the external first liquid pump, causing the first nozzle 1601 to spray out a colored marking liquid. When the sound signal is abnormal, the controller 2 activates the external second liquid pump, causing the second nozzle 1602 to spray out a different colored marking liquid. Since the nozzle 16 is flat and its long side is parallel to the output shaft of the reducer 6, the marking is in the form of a thin strip, which further reduces the difficulty of subsequently determining the abnormal position of the worm gear. (If the marking is too thick, it is easy to cause overlap between adjacent markings, which will increase the difficulty of subsequently determining the abnormal position of the worm gear).

[0093] As a further embodiment of the present invention, it also includes:

[0094] Mounting bracket 17 is fixedly connected to the side wall of the second sliding bracket 14;

[0095] An annular fixing plate 18 is rotatably connected to the side wall of the mounting bracket 17 at the position corresponding to the output shaft of the reducer 6. An annular magnetic scale 19 is fixedly connected to the outer side wall of the annular fixing plate 18.

[0096] The connecting component enables the annular fixed plate 18 to rotate synchronously with the output shaft of the reducer 6;

[0097] The reading head 20 is fixedly connected to the side wall of the mounting bracket 17 at the meshing position of the worm gear in the reducer 6. The reading head 20 is used to record the position information of the annular magnetic scale 19 in real time.

[0098] Timer 21 is fixed on the mounting bracket 17. Timer 21 starts counting when the reducer 6 is started.

[0099] The controller 2 calculates and adjusts the rotational speed of the output shaft of the reducer 6 based on the time information of the timer 21 and the position information recorded by the reading head 20.

[0100] The connecting components include:

[0101] Two arc-shaped clamps 22 are symmetrically slidably connected to the end sidewall of the annular fixed plate 18, and a spring 23 is fixedly connected between the arc-shaped clamps 22 and the annular fixed plate 18.

[0102] Two friction pads 24 are fixedly connected to the inner wall of the arc-shaped clamp 22;

[0103] Four electromagnets 25 are symmetrically fixed and connected in the side wall groove of the arc-shaped clamp 22.

[0104] Specifically, after the reducer 6 is positioned, the second electric cylinder 15 pushes the second sliding frame 14 close to the output shaft of the reducer 6, so that the annular fixing plate 18 is fitted onto the surface of the output shaft of the reducer 6. Then, the circuit of the electromagnet 25 is turned on. Under the mutual attraction of the four electromagnets 25, the two arc-shaped clamps 22 are brought closer to each other and fully contact the output shaft of the reducer 6. In order to ensure that the annular fixing plate 18 can rotate synchronously with the output shaft of the reducer 6, a connecting groove is opened on the side wall of the arc-shaped clamp 22. The two arc-shaped clamps 22 are locked on the output shaft of the reducer 6 by bolts to ensure that the arc-shaped clamps 22 and the output shaft of the reducer 6 rotate synchronously.

[0105] After the arc-shaped clamp 22 is connected, the reducer 6 is started, causing the output shaft of the reducer 6 to rotate, which in turn causes the annular fixed plate 18 to drive the annular magnetic scale 19 to rotate. The timer 21 starts timing. Based on the time information of the timer 21 and the position information recorded by the reading head 20, the controller 2 calculates and adjusts the speed of the output shaft of the reducer 6 to ensure that the output shaft of the reducer 6 can maintain the same speed each time the reducer 6 is tested, thereby helping to reduce the test error.

[0106] The reading head model 20 can be selected from the LIDA 400 series and paired with the LC series magnetic scale.

[0107] It should be noted that controller 2 adjusts the output current of the external power supply and adjusts the speed of the output shaft of reducer 6.

[0108] As a further embodiment of the present invention, it also includes:

[0109] Arc-shaped fixing bracket 26 is fixedly connected to the end of mounting bracket 17;

[0110] Arc-shaped track 27 is provided on arc-shaped fixed frame 26, and arc-shaped track 27 is concentric with the output shaft of reducer 6;

[0111] The arc-shaped mounting plate 28 is slidably connected to the inner wall of the arc-shaped track 27, and the nozzle 16 is fixedly connected to the arc-shaped mounting plate 28.

[0112] A position adjustment assembly is used to adjust the position of the arc-shaped mounting plate 28 on the arc-shaped track 27 to compensate for errors in the marked position;

[0113] The position adjustment component includes:

[0114] Two arc-shaped racks 29 are symmetrically and fixedly connected to the side wall of the arc-shaped mounting plate 28;

[0115] Two gears 30 mesh with two arc-shaped racks 29 respectively. The two gears 30 share the same rotating shaft, which passes through the outer wall of the arc-shaped fixing frame 26 and is rotatably connected to the arc-shaped fixing frame 26.

[0116] The self-locking motor 31 is fixedly connected to the outer wall of the arc-shaped fixing frame 26, and the output shaft of the self-locking motor 31 is fixedly connected to the rotating shaft.

[0117] Specifically, since the controller 2 receives sound and vibration signals from the sound sensor 11 and vibration sensor 12, and then controls the nozzle 16 to spray marking liquid based on the abnormality of the sound and vibration signals, this operation process requires a certain response time. However, the output shaft of the reducer 6 is always rotating, which can easily cause errors between the marking position and the actual abnormal position. Therefore, before testing the reducer 6, the position of the nozzle 16 needs to be calibrated. The specific operation is as follows: first, place the reducer 6 on the testing platform 1 for testing. The testing process is as described above. The output shaft of the reducer 6 rotates only one revolution. The position information of the annular magnetic scale 19 is read in real time by the reading head 20 and fed back to the display screen of the external device. At the same time, the sound sensor 11 and vibration sensor 12... The internal sound and vibration signals of the reducer 6 are monitored in real time. When an abnormality occurs, a red mark will be displayed at the corresponding position information on the external display screen, and a green mark will be displayed otherwise. After the detection is completed, observe whether the extension line of the mark on the output shaft of the reducer 6 corresponds to the target position of the annular magnetic scale 19. The target position is the position of the red mark on the external display screen. If the mark is offset, the self-locking motor 31 is started, so that the output shaft of the self-locking motor 31 rotates, the gear 30 rotates and meshes with the arc rack 29, so that the arc mounting plate 28 drives the nozzle 16 to move until the extension line of the mark on the output shaft of the reducer 6 is consistent with the target position (within 0.1mm error). Then the remaining reducer 6 is detected, thereby reducing the error in determining the abnormal position of the worm gear.

[0118] like Figure 8 and Figure 9 As shown, to solve the above problems, the present invention also proposes a method for testing the speed reducer of a children's vehicle, comprising the following steps:

[0119] S1: Calibrate the position of nozzle 16;

[0120] S2: Place the reducer 6 on the test bench 1 and position it using the positioning component;

[0121] S3: The sound signal inside the reducer 6 and the vibration signal of the reducer 6 housing are detected by the sound sensor 11 and the vibration sensor 12.

[0122] S4: Based on sound signals and vibration information, when an abnormality occurs, the controller 2 controls the nozzle 16 to spray different colored marks on the output shaft of the reducer 6;

[0123] S5: Determine the abnormal area of ​​the worm gear based on the extension line of the mark;

[0124] Specifically, S1 includes the following steps:

[0125] S101: The position information of the annular magnetic scale 19 is read in real time through the reading head 20 and fed back to the display screen of the peripheral device;

[0126] S102: The peripheral display shows different colors at the corresponding location information based on the sound signal and vibration signal; red is displayed for abnormalities and green is displayed for normalities.

[0127] S103: Based on sound signals and vibration information, when an abnormality occurs, the controller 2 controls the nozzle 16 to spray different colored marks on the output shaft of the reducer 6;

[0128] S104: Adjust the spray position of nozzle 16 using the position adjustment component so that the extension line of the mark on the output shaft of reducer 6 is aligned with the position of the red mark on the peripheral display screen.

[0129] Finally, the working principle of this invention is as follows:

[0130] First, place the reducer 6 to be tested on the test table 1. Position the reducer 6 using the positioning components on the test table 1. Then, start the first electric cylinder 8 and the second electric cylinder 15. The telescopic rod of the first electric cylinder 8 pushes the first sliding frame 7. The first sliding frame 7 drives the contact component to approach the outer wall of the reducer 6 and make contact with the outer wall of the reducer 6. The telescopic rod of the second electric cylinder 15 pushes the second sliding frame 14. The second sliding frame 14 drives the nozzle 16 to move closer to the output shaft surface of the reducer 6.

[0131] Then connect the reducer 6 to the external power supply (not shown in the figure), so that the worm inside the reducer 6 rotates slowly. Under the action of the worm gear meshing, the worm gear rotates, thereby causing the output shaft of the reducer 6 to rotate slowly.

[0132] Next, the vibration signal of the contact component is detected by the vibration sensor 12 (since the vibration component is in contact with the reducer, the contact component vibrates when the reducer 6 vibrates), and the vibration signal is transmitted to the controller 2. The controller 2 compares the vibration signal detected by the vibration sensor 12 with the sample vibration signal in real time. When there is a significant difference between the detected vibration signal and the sample vibration signal, for example, the RMS value of the vibration signal frequency band exceeds the calibration value by 120%, the controller 2 controls the nozzle 16 to spray the marking liquid onto the surface of the output shaft of the reducer 6.

[0133] After the test is completed, the reducer 6 is removed from the test bench 1. If there is a color mark on the output shaft, the housing of the reducer 6 is disassembled. Then, the abnormal position of the worm gear is found by drawing a line mark along the extension line of the color mark. After the worm gear is disassembled, the abnormal part of the worm gear can be quickly found according to the marked position, which is convenient for repair and ensures that the reducer 6 has a high degree of safety and reliability.

[0134] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A testing device for a children's vehicle speed reducer, characterized in that, include: The testing platform (1) is provided with a positioning component for positioning the speed reducer (6) at its top. The first sliding frame (7) is driven by the first electric cylinder (8) and is slidably set on the top of the testing table (1). The side wall of the first sliding frame (7) is provided with a contact component for contacting the housing of the reducer (6). Vibration sensor (12), which is disposed on the contact component, is used to detect the vibration signal of the shield (10); The second sliding frame (14) is driven by the second electric cylinder (15) and is slidably set on the top of the testing platform (1). The side wall of the second sliding frame (14) is provided with a nozzle (16) corresponding to the meshing position of the worm gear in the reducer (6). The controller (2) is based on the vibration signal. When the vibration signal is abnormal, the controller (2) controls the nozzle (16) to spray the marking liquid onto the surface of the output shaft of the reducer (6). The contact component includes: Connecting rod (9), which is fixedly connected to the side wall of the first sliding frame (7); A shield (10) is fixed to the end of a connecting rod (9). A sound sensor (11) is provided inside the shield (10). The sound sensor (11) is used to detect the sound signal when the worm gear meshes in the reducer (6). The vibration sensor (12) is mounted on the outer wall of the shield (10); The controller (2) controls the nozzle (16) based on the sound signal. When the sound signal is abnormal, the controller (2) controls the nozzle (16) to spray the marking liquid onto the surface of the output shaft of the reducer (6). Also includes: Mounting bracket (17), which is fixedly connected to the side wall of the second sliding bracket (14); An annular fixing plate (18) is rotatably connected to the side wall of the mounting bracket (17) at the position corresponding to the output shaft of the reducer (6). An annular magnetic scale (19) is fixedly connected to the outer side wall of the annular fixing plate (18). A connecting component that enables the annular fixed plate (18) to rotate synchronously with the output shaft of the reducer (6); The reading head (20) is fixedly connected to the side wall of the mounting bracket (17) at the meshing position of the worm gear in the reducer (6). The reading head (20) is used to record the position information of the annular magnetic scale (19) in real time. The timer (21) is fixed on the mounting bracket (17) and starts timing when the reducer (6) is started; The controller (2) calculates and adjusts the rotational speed of the output shaft of the reducer (6) based on the time information of the timer (21) and the position information recorded by the reading head (20); Also includes: An arc-shaped fixing bracket (26) is fixedly connected to the end of the mounting bracket (17); Arc-shaped track (27), which is set on arc-shaped fixed frame (26), and the arc-shaped track (27) is concentric with the output shaft of reducer (6); An arc-shaped mounting plate (28) is slidably connected to the inner wall of an arc-shaped track (27), and the nozzle (16) is fixedly connected to the arc-shaped mounting plate (28). A position adjustment component is provided for adjusting the position of the arc mounting plate (28) on the arc track (27) to compensate for errors in the marked position.

2. The children's vehicle speed reducer testing equipment according to claim 1, characterized in that, The position adjustment component includes: Two arc-shaped racks (29) are symmetrically fixedly connected to the side wall of the arc-shaped mounting plate (28); Two gears (30) mesh with two arc-shaped racks (29) respectively. The two gears (30) share the same rotating shaft, which passes through the outer wall of the arc-shaped fixing frame (26) and is rotatably connected to the arc-shaped fixing frame (26). The self-locking motor (31) is fixedly connected to the outer wall of the arc-shaped fixing frame (26), and the output shaft of the self-locking motor (31) is fixedly connected to the rotating shaft.

3. The children's vehicle speed reducer testing equipment according to claim 2, characterized in that, The connecting component includes: Two arc-shaped clamps (22) are symmetrically slidably connected to the end sidewall of the annular fixing plate (18), and a spring (23) is fixedly connected between the arc-shaped clamps (22) and the annular fixing plate (18). Two friction pads (24) are fixedly connected to the inner wall of the arc-shaped clamp (22); Four electromagnets (25) are symmetrically fixedly connected in the side wall groove of the arc-shaped clamp (22).

4. The children's vehicle reducer testing equipment according to claim 3, characterized in that, The nozzle (16) is flat, and the long side of the nozzle (16) is parallel to the output shaft of the reducer (6).

5. The children's vehicle reducer testing equipment according to claim 4, characterized in that, The nozzle (16) has a first nozzle (1601) and a second nozzle (1602) built in. The top of the nozzle (16) is fixed with a first pipe (1603) that communicates with the first nozzle (1601) and a second pipe (1604) that communicates with the second nozzle (1602). The first pipe (1603) is connected to an external first liquid pump pipeline, and the second pipe (1604) is connected to an external second liquid pump pipeline.

6. A method for testing a children's vehicle speed reducer, applicable to the children's vehicle speed reducer testing equipment described in claim 5, comprising the following steps: S1: Calibrate the position of the nozzle (16); S2: Place the reducer (6) on the test bench (1) and position it using the positioning component; S3: The sound signal inside the reducer (6) and the vibration signal of the reducer (6) housing are detected by the sound sensor (11) and the vibration sensor (12); S4: Based on sound signals and vibration information, the controller (2) controls the nozzle (16) to spray different colored marks on the output shaft of the reducer (6) when an abnormality occurs; S5: Determine the abnormal area of ​​the worm gear based on the extension line of the mark.

7. The method for testing a children's vehicle speed reducer according to claim 6, characterized in that, S1 specifically includes the following steps: S101: The position information of the annular magnetic scale (19) is read in real time through the reading head (20) and fed back to the display screen of the peripheral device; S102: The peripheral display shows different colors at the corresponding location information based on the sound signal and vibration signal; red is displayed for abnormalities and green is displayed for normalities. S103: The controller (2) controls the nozzle (16) to spray different colored marks on the output shaft of the reducer (6) when an abnormality occurs, based on sound signals and vibration information. S104: Adjust the spray position of the nozzle (16) by means of the position adjustment component so that the extension line of the mark on the output shaft of the reducer (6) is consistent with the position of the red mark on the peripheral display screen.

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