Fatigue fracture detection device for automobile stabilizer bar

Abstract

The utility model relates to the technical field of vehicle accessories, in particular to a fatigue fracture detection device for an automobile stabilizer bar. The utility model provides a fatigue fracture detection device for an automobile stabilizer bar. The fatigue fracture detection device comprises two fixing mechanisms, two acquisition mechanisms, a power supply test mechanism and a controller. In the testing process, the two fixing mechanisms are connected to the to-be-tested stabilizer bar at intervals through the insulating connecting suite, the driving mechanism applies driving force to the second connector of the collecting mechanism, and meanwhile the power supply testing mechanism supplies power to the to-be-tested stabilizer bar to form a loop. A collecting part of the collecting mechanism is used for collecting the number of tests of the driving mechanism and the value of the applied test force. When the to-be-tested stabilizer bar is broken, the controller detects that the loop is disconnected at the millisecond level and controls the driving mechanism to stop running, and the collecting piece records the number of tests at the same time. The automobile stabilizer bar fatigue fracture detection device provided by the utility model realizes zero-error and zero-delay recording. And the accuracy of fracture detection is effectively ensured, and the fatigue test is not delayed.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle accessories, and in particular to a fatigue fracture detection device for a vehicle stabilizer bar. Background Art

[0002] As the requirements of automobile customers for small family cars continue to increase, people's requirements for automobile suspension stability and comfort are also increasing. The function of the body stabilizer bar is to prevent the body from excessive lateral tilt when turning, and to keep the body balanced as much as possible. When the car turns, the body tilts, the suspension on both sides jumps inconsistently, the outer suspension will press against the stabilizer bar, the stabilizer bar will be twisted, and the elastic force of the bar body will prevent the wheel from lifting, so that the body can be kept as balanced as possible, playing a role in lateral stability.

[0003] The function of the suspension stabilizer bar is to stabilize the bar body, generate downward rebound force on the right side, and generate upward rebound force on the left side at the same time, thus reducing the compression and elongation of the right and left suspension springs respectively, and preventing deformation. The mechanical properties of the stabilizer bar itself determine the stability of the vehicle body; the number of fatigue fractures of the stabilizer bar determines the service life and safety of a car. Therefore, under the condition of high-frequency vibration displacement of the stabilizer bar at a constant value, the mechanical change value and fatigue fracture number of the stabilizer bar are important indicators to measure the performance of the stabilizer bar.

[0004] The current measurement method is to connect a force sensor between two sections of the stabilizer bar, and the motor drives the stabilizer bar to perform high-frequency vibration. However, the existing test system cannot accurately detect the fatigue fracture of the stabilizer bar, and the recorded number of fatigue fractures is greater than the actual number of fractures; the downtime lags behind the fatigue fracture time of the stabilizer bar, causing the service life of the force sensor to be greatly shortened under high-frequency oscillation. Utility Model Content

[0005] The present application provides a vehicle stabilizer bar fatigue fracture detection device, which can effectively solve the above or other potential technical problems.

[0006] The present application provides a fatigue fracture detection device for a vehicle stabilizer bar, comprising two fixing mechanisms, two collecting mechanisms, a power supply test mechanism and a controller; the fixing mechanism comprises an insulating connection kit, and the insulating connection kit is connected to the stabilizer bar to be tested at a connection interval; the collecting mechanism comprises a first joint, a second joint and a collecting piece arranged between the first joint and the second joint, the first joint is used to connect the end of the stabilizer bar to be tested, and the second joint is used to connect the driving mechanism for applying force; the power supply test mechanism is used to supply power to the stabilizer bar to be tested and form a loop; the collecting piece is used to collect the number of tests of the driving mechanism and the value of the applied test force; the collecting piece and the power supply test mechanism are both connected to the controller.

[0007] The automobile stabilizer bar fatigue fracture detection device provided by the present application includes two fixing mechanisms, two collecting mechanisms, a power supply test mechanism and a controller. During the test process, the two fixing mechanisms are connected to the stabilizer bar to be tested at intervals through an insulating connection kit, and the driving mechanism simulates the force applied to the stabilizer bar to be tested by applying a driving force to the second joint of the collecting mechanism. At the same time, the power supply test mechanism supplies power to the stabilizer bar to be tested and forms a circuit. The collecting part of the collecting mechanism is used to collect the number of tests of the driving mechanism and the value of the applied test force. When the stabilizer bar to be tested breaks, the controller detects the circuit break at the millisecond level, and controls the driving mechanism to stop running, and the collecting part records the number of tests at the same time. The automobile stabilizer bar fatigue fracture detection device provided by the present application achieves zero error and zero delay recording. The accuracy of fracture detection is effectively guaranteed, and fatigue test is tested without delay.

[0008] In an optional embodiment, the insulating connection kit includes an insulating sleeve and a metal mounting seat, wherein the insulating sleeve is disposed in the metal mounting seat; and the insulating sleeve is used to be mounted on the stabilizing rod to be tested.

[0009] In an optional embodiment, the insulating sleeve comprises a vulcanized insulating rubber sleeve.

[0010] In an optional embodiment, both the first joint and the second joint are universal joints; and the connecting parts of the first joint and the second joint are both provided with an insulating layer.

[0011] In an optional embodiment, the first joint is fixedly connected to the stabilizer bar to be tested by using screws.

[0012] In an optional embodiment, the acquisition component includes a floating shaft, a guide sleeve and a force sensor; one end of the floating shaft is provided with the second joint, and the other end is sleeved in the guide sleeve; and the force sensor is connected to the floating shaft.

[0013] In an optional embodiment, the guide sliding clearance between the floating shaft and the guide sleeve is set to 0.01-0.02 mm.

[0014] In an optional embodiment, the acquisition component also includes a first flange, a second flange and a connecting shaft; one end of the first flange is connected to the first joint via a first locking nut, and the other end abuts against the force sensor; the second flange is spaced apart from the first flange and arranged opposite to each other, one end of the second flange abuts against an end of the force sensor away from the first flange, and the other end is connected to the guide sleeve via bolts; the connecting shaft passes through the first flange, the second flange and the force sensor.

[0015] In an optional embodiment, an insulating gasket and an insulating conduit are provided at the connection between the connecting shaft and the first flange; and an insulating pad is provided at the connection between the first flange and the force sensor.

[0016] In an optional embodiment, an outer side wall of the floating shaft placed in the guide sleeve is provided with an oil groove.

[0017] Advantages of additional aspects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0019] Figure 1 A schematic diagram of the overall structure of the vehicle stabilizer bar fatigue fracture detection device and the stabilizer bar to be tested at a first viewing angle provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the overall structure of the vehicle stabilizer bar fatigue fracture detection device and the stabilizer bar to be tested under a second viewing angle provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the overall structure of the vehicle stabilizer bar fatigue fracture detection device and the stabilizer bar to be tested under a third viewing angle provided in an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the overall structure of the vehicle stabilizer bar fatigue fracture detection device provided in an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 10. Automobile stabilizer bar fatigue fracture detection device; 11. Fixing mechanism; 111. Insulating sleeve; 112. Metal mounting seat; 12. Collecting mechanism; 121. First joint; 122. Second joint; 123. Collecting piece; 1231. Floating shaft; 1232. Guide sleeve; 1233. Force sensor; 1234. First flange; 1235. Second flange; 1236. Connecting shaft; 1237. First locking nut; 1238. Second locking nut; 1239. Oil tank; 124. Screw; 125. Insulating washer; 126. Insulating conduit; 127. Insulating pad; 20. Stabilizer bar to be tested. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] As the requirements of automobile customers for small family cars continue to increase, people's requirements for automobile suspension stability and comfort are also increasing. The function of the body stabilizer bar is to prevent the body from excessive lateral tilt when turning, and to keep the body balanced as much as possible. When the car turns, the body tilts, the suspension on both sides jumps inconsistently, the outer suspension will press against the stabilizer bar, the stabilizer bar will be twisted, and the elastic force of the bar body will prevent the wheel from lifting, so that the body can be kept as balanced as possible, playing a role in lateral stability.

[0031] The function of the suspension stabilizer bar is to stabilize the bar body, generate a downward rebound force on the right side, and an upward rebound force on the left side at the same time, thus reducing the compression and elongation of the right and left suspension springs respectively, and preventing deformation. The mechanical properties of the stabilizer bar itself determine the stability of the vehicle body; the number of fatigue fractures of the stabilizer bar determines the service life and safety of a car. Therefore, under the high-frequency vibration displacement condition of the stabilizer bar at a constant value, the mechanical change value and fatigue fracture number of the stabilizer bar are important indicators for measuring the performance of the stabilizer bar. The current measurement method is to connect a force sensor to the two sections of the stabilizer bar, and the motor drives the stabilizer bar to vibrate at high frequency. However, the existing test system cannot accurately detect the fatigue fracture of the stabilizer bar, and the number of fatigue fractures recorded is greater than the actual number of fractures; the downtime lags behind the fatigue fracture time of the stabilizer bar, causing the service life of the force sensor to be greatly shortened under high-frequency vibration.

[0032] In view of this, the automobile stabilizer bar fatigue fracture detection device provided by the present application includes two fixing mechanisms, two collecting mechanisms, a power supply test mechanism and a controller. During the test process, the two fixing mechanisms are connected to the stabilizer bar to be tested at intervals through an insulating connection kit, and the driving mechanism simulates the force applied to the stabilizer bar to be tested by applying a driving force to the second connector of the collecting mechanism. At the same time, the power supply test mechanism supplies power to the stabilizer bar to be tested and forms a circuit. The collecting part of the collecting mechanism is used to collect the number of tests of the driving mechanism and the value of the applied test force. When the stabilizer bar to be tested breaks, the controller detects the circuit break at the millisecond level, and controls the driving mechanism to stop running, and the collecting part records the number of tests at the same time. The automobile stabilizer bar fatigue fracture detection device provided by the present application achieves zero error and zero delay recording. The accuracy of fracture detection is effectively guaranteed, and fatigue test is tested without delay.

[0033] Please refer to Figures 1 to 4The automobile stabilizer bar fatigue fracture detection device 10 provided in the embodiment of the present application includes two fixing mechanisms 11, two collecting mechanisms 12, a power supply test mechanism and a controller; the fixing mechanism 11 includes an insulating connection kit, and the insulating connection kit is connected to the stabilizer bar 20 to be tested; the collecting mechanism 12 includes a first joint 121, a second joint 122 and a collecting piece 123 arranged between the first joint 121 and the second joint 122, the first joint 121 is used to connect the end of the stabilizer bar 20 to be tested, and the second joint 122 is used to connect the driving mechanism for applying force; the power supply test mechanism is used to supply power to the stabilizer bar 20 to be tested and form a loop; the collecting piece 123 is used to collect the number of tests of the driving mechanism and the value of the applied test force; the collecting piece 123 and the power supply test mechanism are both connected to the controller. The controller can be a PLC or a single-chip microcomputer. Since the controller collects data, it is a very simple technology, so it will not be described in detail.

[0034] The automobile stabilizer bar fatigue fracture detection device 10 provided in the present application includes two fixing mechanisms 11, two collecting mechanisms 12, a power supply test mechanism and a controller. During the test process, the two fixing mechanisms 11 are connected to the stabilizer bar 20 to be tested at intervals through an insulating connection kit. The driving mechanism simulates the force applied to the stabilizer bar 20 to be tested by applying a driving force to the second joint 122 of the collecting mechanism 12. At the same time, the power supply test mechanism supplies power to the stabilizer bar 20 to be tested and forms a circuit. The collecting member 123 of the collecting mechanism 12 is used to collect the number of tests of the driving mechanism and the value of the applied test force. When the stabilizer bar 20 to be tested breaks, the controller detects the circuit break at the millisecond level and controls the driving mechanism to stop running. The collecting member 123 also records the number of tests. The automobile stabilizer bar fatigue fracture detection device 10 provided in the present application achieves zero error and zero delay recording. The accuracy of fracture detection is effectively guaranteed, and fatigue test is tested without delay.

[0035] In an optional exemplary embodiment, the insulating connection kit includes an insulating sleeve 111 and a metal mounting seat 112 , wherein the insulating sleeve 111 is disposed in the metal mounting seat 112 ; the insulating sleeve 111 is used to be sleeved on the stabilizing rod 20 to be tested.

[0036] It should be noted that, specifically, in this embodiment, the insulating connection kit is configured to include an insulating sleeve 111 and a metal mounting seat 112, and the insulating sleeve 111 is arranged in the metal mounting seat 112; the insulating sleeve 111 is sleeved on the stabilizing rod 20 to be tested, and the metal mounting seat 112 can be used to ensure the stability of the connection, and the insulating sleeve 111 can ensure insulation to avoid interfering with the work of the power supply testing mechanism.

[0037] In an alternative exemplary embodiment, the insulating sleeve 111 includes a vulcanized insulating rubber sleeve.

[0038] It should be noted that, specifically, in this embodiment, the insulating sleeve 111 can be a vulcanized insulating rubber sleeve. It can be understood that the specific material of the insulating sleeve 111 is not limited here. In other specific embodiments, the insulating sleeve 111 can also be made of other suitable insulating materials according to the specific needs of the user.

[0039] In an optional exemplary embodiment, both the first joint 121 and the second joint 122 are universal joints; and the connecting parts of the first joint 121 and the second joint 122 are both provided with an insulating layer.

[0040] It should be noted that, specifically, in this embodiment, the first joint 121 and the second joint 122 are both universal joints, so that the driving mechanism can provide forces in multiple directions. The connecting parts of the first joint 121 and the second joint 122 are both provided with an insulating layer to ensure insulation and avoid interfering with the work of the power supply test mechanism.

[0041] In an optional exemplary embodiment, the first joint 121 is fixedly connected to the stabilizer bar 20 to be tested by using screws 124 .

[0042] It should be noted that, specifically, in this embodiment, the first joint 121 and the stabilizer bar 20 to be tested are fixedly connected by screws 124. This can achieve convenient connection and ensure the stability of the connection.

[0043] In an optional exemplary embodiment, the collecting member 123 includes a floating shaft 1231 , a guide sleeve 1232 and a force sensor 1233 ; one end of the floating shaft 1231 is connected to the second joint 122 , and the other end is sleeved in the guide sleeve 1232 ; the force sensor 1233 is connected to the floating shaft 1231 .

[0044] It should be noted that, specifically, in this embodiment, the acquisition component 123 is configured to include a floating shaft 1231, a guide sleeve 1232, and a force sensor 1233; one end of the floating shaft 1231 is the second joint 122, and the other end is sleeved in the guide sleeve 1232; the force sensor 1233 is connected to the floating shaft 1231. A driving force is applied to the second joint 122 through a driving mechanism, and the second joint 122 drives the floating shaft 1231. During the operation of the floating shaft 1231 and the guide sleeve 1232, force is also applied to the force sensor 1233, so that the force sensor 1233 records the value of the driving force and the number of times the force is applied.

[0045] In an optional exemplary embodiment, the guide sliding clearance between the floating shaft 1231 and the guide sleeve 1232 is set to 0.01-0.02 mm.

[0046] It should be noted that, specifically, in this embodiment, the guide sliding clearance between the floating shaft 1231 and the guide sleeve 1232 is set to 0.01-0.02 mm. Specifically, the Rockwell hardness of the floating shaft 1231 and the guide sleeve 1232 can be set to be above Rockwell hardness HRC60, so that high hardness and high wear resistance are matched to achieve resistance-free sliding, and the force value detection result is not affected at all.

[0047] In an optional exemplary embodiment, an outer side wall of the floating shaft 1231 placed inside the guide sleeve 1232 is provided with an oil groove 1239 .

[0048] It should be noted that, specifically, in this embodiment, high-speed grease is filled in the oil groove 1239, so that a high-speed movement of 10 Hz can be achieved without damaging the force sensor. The service life of the force sensor 1233 can be increased from 3 months to 3 years, which effectively reduces the cost of replacing the force sensor 1233 for customers.

[0049] In an optional exemplary embodiment, the collecting member 123 further includes a first flange 1234, a second flange 1235 and a connecting shaft 1236; one end of the first flange 1234 is connected to the first joint 121 via a first locking nut 1237, and the other end abuts against the force sensor 1233; the second flange 1235 is spaced apart from the first flange 1234 and arranged opposite to each other, one end of the second flange 1235 abuts against an end of the force sensor 1233 away from the first flange 1234, and the other end is connected to the guide sleeve 1232 via bolts; the connecting shaft 1236 passes through the first flange 1234, the second flange 1235 and the force sensor 1233.

[0050] In an optional exemplary embodiment, an insulating gasket 125 and an insulating conduit 126 are provided at the connection between the connecting shaft 1236 and the first flange 1234 ; an insulating pad 127 is provided at the connection between the first flange 1234 and the force sensor 1233 .

[0051] Exemplarily, the floating shaft 1231 is connected to the second joint 122 via a second locking nut 1238 .

[0052] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

[0053] 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, this application will not further describe various possible combinations.

Claims

1. A vehicle stabilizer bar fatigue fracture detection device, characterized in that: It includes two fixing mechanisms, two collecting mechanisms, a power supply testing mechanism and a controller; The fixing mechanism comprises an insulating connection kit, and the insulating connection kit is connected to the stabilizing rod to be tested at a connection interval; The collection mechanism comprises a first joint, a second joint and a collection member arranged between the first joint and the second joint, the first joint is used to connect the end of the stabilizing rod to be tested, and the second joint is used to connect the driving mechanism for applying force; The power supply test mechanism is used to supply power to the stabilizer bar to be tested and form a loop; The collecting member is used to collect the test times of the driving mechanism and the value of the applied test force; The collecting component and the power supply testing mechanism are both connected to the controller.

2. The vehicle stabilizer bar fatigue fracture detection device according to claim 1, characterized in that: The insulating connection kit comprises an insulating sleeve and a metal mounting seat, wherein the insulating sleeve is arranged in the metal mounting seat; the insulating sleeve is used for being sleeved on the stabilizing rod to be tested.

3. The vehicle stabilizer bar fatigue fracture detection device according to claim 2, characterized in that: The insulating sleeve comprises a vulcanized insulating rubber sleeve.

4. The vehicle stabilizer bar fatigue fracture detection device according to claim 1, characterized in that: The first joint and the second joint are both universal joints; The connecting parts of the first joint and the second joint are both provided with an insulating layer.

5. The vehicle stabilizer bar fatigue fracture detection device according to claim 1, characterized in that: The first joint is fixedly connected to the stabilizer bar to be tested by using screws.

6. The vehicle stabilizer bar fatigue fracture detection device according to claim 1, characterized in that: The collecting component comprises a floating shaft, a guide sleeve and a force sensor; one end of the floating shaft is provided with the second joint, and the other end is sleeved in the guide sleeve; the force sensor is connected to the floating shaft.

7. The vehicle stabilizer bar fatigue fracture detection device according to claim 6, characterized in that: The guide sliding clearance between the floating shaft and the guide sleeve is set to 0.01-0.02mm.

8. The vehicle stabilizer bar fatigue fracture detection device according to claim 6, characterized in that: The acquisition component further includes a first flange, a second flange and a connecting shaft; one end of the first flange is connected to the first joint through a first locking nut, and the other end is in contact with the force sensor; the second flange is spaced apart from the first flange and arranged opposite to each other, one end of the second flange is in contact with an end of the force sensor away from the first flange, and the other end is connected to the guide sleeve through a bolt; The connecting shaft passes through the first flange, the second flange and the force sensor.

9. The vehicle stabilizer bar fatigue fracture detection device according to claim 8, characterized in that: An insulating gasket and an insulating conduit are provided at the connection between the connecting shaft and the first flange; An insulating pad is provided at the connection between the first flange and the force sensor.

10. The vehicle stabilizer bar fatigue fracture detection device according to claim 6, characterized in that: The outer side wall of the floating shaft placed in the guide sleeve is provided with an oil groove.

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