Full-automatic chassis abnormal sound detection device

Abstract

The utility model discloses a full-automatic chassis abnormal sound detection device, and aims to solve the problems of short service life and low reliability of a transmission structure in the prior art. Comprising a machine body, a vibration simulation mechanism is arranged in the machine body and comprises a servo motor and an eccentric wheel, the servo motor drives the eccentric wheel to rotate through a transmission mechanism, the eccentric wheel comprises an eccentric bearing and a protruding part, and the protruding part is located above the eccentric bearing and is relatively and fixedly connected with the lower end of a lifting platform; therefore, the servo motor drives the lifting platform to move up and down. The utility model has the advantages that through the structure of the eccentric wheel, the defect of small lifting force caused by a connecting rod mechanism is overcome, the whole mechanism runs more smoothly, the influence of alternating stress on parts is greatly reduced, the risk that the parts are broken due to stress is reduced, and the reliability and durability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile chassis detection, in particular to a full-automatic chassis abnormal noise detection device. Background Art

[0002] The chassis structure of a car is relatively complex. After a period of use, the chassis will become loose and parts will make abnormal noises due to the aging of internal parts. Abnormal noise in the chassis of a car is one of the most difficult faults to diagnose. The traditional detection method is for the maintenance technician to use tools to shake the car to find the source of the abnormal noise. However, this detection method has problems such as low troubleshooting efficiency, high risk, and inability to reproduce real vibration conditions.

[0003] In the face of the above problems, a Chinese utility model patent with authorization announcement number CN220794427U and authorization announcement date April 16, 2024 discloses a vehicle chassis abnormal noise detector, which drives the first transmission shaft and the first spur gear to rotate forward and backward through the forward and reverse rotation of the servo motor. Since the first spur gear and the second spur gear are meshed, the second transmission shaft and the second spur gear are driven to rotate in the opposite direction at the same time, thereby driving the first bracket and the third bracket to rotate. Through the rotation of the first bracket and the third bracket, the second bracket and the fourth bracket are driven to rotate, thereby driving the mounting plate to move up and down, and finally driving the vehicle tires and chassis to vibrate. Such a transmission structure has two shortcomings: first, the bracket has a small lifting force and low reliability, and is prone to damage under high torque working conditions, thereby affecting the life of the entire device; second, the method of controlling the lifting and lowering of the mounting plate by controlling the forward and reverse rotation of the servo motor will cause the gears and brackets to be subjected to alternating stress, increasing the risk of fatigue fracture of components and greatly reducing the life of the two parts. Utility Model Content

[0004] The utility model aims to provide a fully automatic chassis abnormal noise detection device to solve the problems of low service life and reliability of the transmission structure in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A fully automatic chassis abnormal noise detection device is designed, including a body, wherein a vibration simulation mechanism is arranged in the body, the vibration simulation mechanism includes a servo motor and an eccentric wheel, the servo motor drives the eccentric wheel to rotate through a transmission mechanism, the eccentric wheel includes an eccentric bearing and a protrusion, the protrusion is located above the eccentric bearing, and the protrusion is relatively fixedly connected to the lower end of the lifting platform, so that the lifting platform can be driven up and down by the servo motor.

[0007] Preferably, the transmission mechanism includes a small pulley, a belt and a large pulley, the output shaft of the servo motor is fixedly mounted with a small pulley, the small pulley is transmission-connected to the large pulley via a belt, and the large pulley and the eccentric wheel are relatively fixed on the eccentric wheel drive shaft.

[0008] Preferably, the large pulley and the eccentric wheel are both connected to the eccentric wheel drive shaft through a key transmission.

[0009] Preferably, the small pulley and the large pulley are both two-groove pulleys, and the grooves are used to embed and install the belt.

[0010] Preferably, a drive shaft mounting plate is fixed in the body, and the eccentric wheel drive shaft is mounted on the drive shaft mounting plate through at least two bearing seats.

[0011] Preferably, three bearing seats are installed on the drive shaft mounting plate, and the bearing seats are detachably connected to the drive shaft mounting plate.

[0012] Preferably, a bearing and a shaft are installed on the protrusion, and a lifting platform mounting bearing is also installed on the shaft at both sides of the protrusion, and the lifting platform mounting bearing is fixedly connected to the lifting platform.

[0013] Preferably, the machine body comprises a frame structure and a machine body enclosure, the frame structure is formed of square steel, and the drive shaft mounting plate is mounted on the square steel.

[0014] Preferably, a tire support structure is provided on the top of the machine body, and the tire support structure includes a tire support plate adapted to the tire structure, and the tire support structure is connected and fixed to the lifting platform via a support shaft.

[0015] Preferably, it also includes leveling feet, which include an adjustment handle and anchor screws. Foot mounting plates are installed at the four corners of the bottom of the machine body, and the foot mounting plates are provided with openings for the anchor screws to pass through.

[0016] Compared with the prior art, the beneficial technical effect of the utility model is that the utility model overcomes the defect of small lifting force caused by the connecting rod mechanism through the structure of the eccentric wheel. At the same time, the eccentric wheel is driven by the constant steering of the motor to complete the lifting and lowering actions of the lifting platform. Compared with the prior art through the forward and reverse control of the motor, the entire mechanism of the present application runs more smoothly, greatly reduces the influence of alternating stress on components, reduces the risk of components breaking due to stress, and improves the reliability and durability of the device.

[0017] The transmission structure of the pulley driving the eccentric wheel is adopted. The small pulley is driven by the motor, the small pulley drives the large pulley, and the large pulley drives the eccentric wheel to rotate, thereby driving the lifting platform up and down to perform the lifting action. The movement of the entire platform is smoother, the durability of the entire motion mechanism is better, and the requirements for the drive motor are lower. The frequency of tire vibration can be simulated by only controlling the speed of the motor, and a high-precision servo motor is not required, which saves manufacturing costs. At the same time, the use of belt drive and the elimination of gear drive is conducive to reducing the movement noise of the entire device, and it is more conducive to maintenance personnel to determine the source of abnormal noise in the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the machine body in the utility model;

[0020] Figure 3 It is a partial structural schematic diagram of the utility model;

[0021] Figure 4 It is the front view of the eccentric wheel in the utility model.

[0022] In the figure, 1-machine body; 2-wheel support plate; 3-machine foot mounting plate; 41-adjusting handle; 42-anchor screw; 5-servo motor; 61-small pulley; 62-large pulley; 7-eccentric wheel; 71-eccentric bearing; 72-protrusion; 8-eccentric wheel drive shaft; 9-bearing seat; 10-drive shaft mounting plate; 11-lifting platform mounting bearing; 12-lifting platform; 13-support shaft. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments, but the following embodiments are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way. The equipment parts, structures, etc. involved in the following embodiments are all conventional commercially available products unless otherwise specified.

[0024] Example 1: A fully automatic chassis abnormal noise detection device, see Figure 1-4, consisting of two parts: a body 1 and a tire base. The body 1 includes structures such as leveling feet, universal wheels, a control panel, a digital display panel, a moving handle, and a body enclosure; the tire base is concave and has a pattern inside. The body 1 includes a frame structure inside, and the frame structure is specifically composed of square steel. A vibration simulation mechanism is provided inside the body 1, and the vibration simulation mechanism includes a servo motor 5 and an eccentric wheel 7. The servo motor 5 drives the eccentric wheel 7 to rotate through a transmission mechanism. The eccentric wheel 7 includes an eccentric bearing 71 and a protrusion 72. The protrusion 72 is located above the eccentric bearing 71, and the protrusion 72 is relatively fixedly connected to the lower end of the lifting platform 12, so that the lifting platform 12 is driven up and down by the servo motor 5.

[0025] Specifically, Figure 3 As shown, the transmission mechanism includes a small pulley 61, a belt (not shown in the figure) and a large pulley 62. Both the small pulley 61 and the large pulley 62 are two-groove pulleys, and the grooves are used to embed and install the belt. Since the pulley is a two-groove pulley, two circles of grooves are provided on it. In this way, the small pulley 61 and the large pulley 62 can be connected through two sets of belt transmission. Even if one set of belts is damaged, there is still one set of belts that can work, which improves the reliability and stability of the transmission connection.

[0026] like Figure 2 As shown, the small pulley 61 is fixedly mounted on the output shaft of the servo motor 5 and is connected to the large pulley 62 through a belt drive. A drive shaft mounting plate 10 is fixed in the machine body 1, and the drive shaft mounting plate 10 is mounted on a square steel. The eccentric drive shaft 8 is mounted and fixed on the drive shaft mounting plate 10 through a plurality of bearing seats 9. Specifically, three bearing seats 9 are provided and are evenly spaced and arranged on the drive shaft mounting plate 10. The bearing seats 9 and the drive shaft mounting plate 10 are detachably connected through a bolt assembly. The provision of three bearing seats 9 is conducive to stabilizing the eccentric drive shaft 8 and the large pulley 62. As shown in FIG. Figure 2 As shown, the large pulley 62 is fixed to one end of the eccentric drive shaft 8 by a key connection, the eccentric bearing 71 on the eccentric 7 is fixed to the eccentric drive shaft 8 by a key connection, and the eccentric 7 is installed between two bearing seats 9. A protrusion 72 is provided above the eccentric bearing 71 of the eccentric 7, a bearing and a shaft are installed on the protrusion 72, and a lifting platform mounting bearing 11 is also installed on both sides of the protrusion 72 on the shaft, and the lifting platform mounting bearing 11 is detachably fixedly connected to the lifting platform 12 by a bolt assembly.

[0027] like Figure 1 and Figure 2As shown, a tire support structure is provided on the top of the machine body 1, and the tire support structure includes a tire support plate 2 adapted to the tire structure, and the tire support structure is fixedly connected to the lifting platform 12 through a support shaft 13. The device also includes a leveling foot, and the leveling foot includes an adjustment handle 41 and a foundation screw 42. A foot mounting plate 3 is installed at each of the four corners of the bottom of the machine body 1, and an opening is provided on the foot mounting plate 3 for the foundation screw 42 to pass through.

[0028] The specific working mode of the vibration simulation mechanism is: the servo motor 5 rotates to drive the small pulley 61 to rotate, the small pulley 61 transmits the torque to the large pulley 62 through the belt, drives the large pulley 62 to rotate, the large pulley 62 transmits the torque from the motor to the eccentric drive shaft 8 through the key structure, the eccentric drive shaft 8 drives the eccentric bearing 71 on the eccentric wheel 7 to rotate through the key structure, so as to realize the up and down movement of the eccentric wheel 7 as a whole, and finally drives the lifting platform 12 fixed to the eccentric wheel protrusion 72 to move up and down. The operator can adjust the vibration frequency of the lifting platform 12 by adjusting the speed of the servo motor 5, so as to simulate the bumpy situation of the automobile chassis driving on different roads, so that the maintenance personnel can quickly and accurately find the specific location of the abnormal chassis noise.

[0029] Compared with the prior art, the utility model overcomes the defect of small lifting force caused by the connecting rod mechanism through the structure of the eccentric wheel. At the same time, the eccentric wheel is driven by the constant direction of the motor to complete the lifting and lowering action of the lifting platform. Compared with the prior art through the forward and reverse control of the motor, the entire mechanism of the present application runs more smoothly, greatly reducing the influence of the alternating stress on the parts, reducing the risk of the parts generating stress and breaking, and improving the reliability and durability of the device. The utility model adopts a transmission structure in which the pulley drives the eccentric wheel. The small pulley is driven by the motor, the small pulley drives the large pulley, and the large pulley drives the eccentric wheel to rotate, thereby driving the lifting platform up and down to perform the lifting action. Make the movement of the entire platform smoother, the durability of the entire motion mechanism is better, and the requirements for the drive motor are lower. Only the speed of the motor needs to be controlled to simulate the frequency of tire vibration, and no high-precision servo motor is required, which saves manufacturing costs. At the same time, the belt drive is adopted, and the gear drive is cancelled, which is conducive to reducing the movement noise of the entire device and more conducive to the maintenance personnel to judge the source of the abnormal noise of the chassis.

[0030] The utility model is described in detail above with reference to the accompanying drawings and embodiments. However, those skilled in the art will appreciate that, without departing from the spirit of the utility model, the specific parameters in the above embodiments may be changed to form a plurality of specific embodiments, which are all within the common variation range of the utility model and will not be described in detail here.

Claims

1. A fully automatic chassis abnormal noise detection device, comprising a body, characterized in that: A vibration simulation mechanism is provided in the body, and the vibration simulation mechanism includes a servo motor and an eccentric wheel. The servo motor drives the eccentric wheel to rotate through a transmission mechanism. The eccentric wheel includes an eccentric bearing and a protrusion. The protrusion is located above the eccentric bearing, and the protrusion is relatively fixedly connected to the lower end of the lifting platform, so that the lifting platform can be driven up and down by the servo motor.

2. The fully automatic chassis abnormal noise detection device according to claim 1 is characterized in that: The transmission mechanism includes a small pulley, a belt and a large pulley. The output shaft of the servo motor is fixedly mounted with a small pulley, the small pulley is transmission-connected to the large pulley via a belt, and the large pulley and the eccentric wheel are relatively fixed on the eccentric wheel drive shaft.

3. The fully automatic chassis abnormal noise detection device according to claim 2 is characterized in that: The large pulley and the eccentric wheel are both connected to the eccentric wheel driving shaft through key transmission.

4. The fully automatic chassis abnormal noise detection device according to claim 2 is characterized in that: The small pulley and the large pulley are both two-groove pulleys, and the grooves are used for embedding and installing the belt.

5. The fully automatic chassis abnormal noise detection device according to claim 2, characterized in that: A drive shaft mounting plate is fixed in the machine body, and the eccentric wheel drive shaft is mounted on the drive shaft mounting plate through at least two bearing seats.

6. The fully automatic chassis abnormal noise detection device according to claim 5, characterized in that: Three bearing seats are installed on the drive shaft mounting plate, and the bearing seats are detachably connected to the drive shaft mounting plate.

7. The fully automatic chassis abnormal noise detection device according to claim 1, characterized in that: The protruding portion is provided with a bearing and a shaft, and the shaft is provided with lifting platform mounting bearings at both sides of the protruding portion, and the lifting platform mounting bearings are fixedly connected to the lifting platform.

8. The fully automatic chassis abnormal noise detection device according to claim 5, characterized in that: The machine body comprises a frame structure and a machine body enclosure, the frame structure is formed by square steel, and the drive shaft mounting plate is mounted on the square steel.

9. The fully automatic chassis abnormal noise detection device according to any one of claims 1 to 8, characterized in that: A tire support structure is provided on the top of the machine body. The tire support structure includes a tire support plate matched with the tire structure. The tire support structure is connected and fixed to the lifting platform through a support shaft.

10. The fully automatic chassis abnormal noise detection device according to any one of claims 1 to 8, characterized in that: It also includes leveling feet, which include an adjustment handle and anchor screws. Foot mounting plates are installed at the four corners of the bottom of the machine body, and the foot mounting plates are provided with openings for the anchor screws to pass through.

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