Drive axle with fault diagnosis system

Abstract

The present invention provides a drive axle provided with a fault diagnosis system, the drive axle sensing driving factors such as vibration, temperature and pressure, which are generated according to driving conditions such as speed and load, in an axle housing assembly, so as to determine abnormalities, thereby preventing dangerous situations during driving and thus improving driving stability and reliability.

Description

Drive axle equipped with a fault diagnosis system

[0001] The present invention relates to a drive axle equipped with a fault diagnosis system that secures driving stability and reliability by preemptively determining abnormal situations, including failure of power transmission, damage to parts, noise, and vehicle wheel separation, that occur in the drive axle.

[0002] In general, the power transmission device of an automobile is a device that transmits the power generated from the engine or motor to the driving wheels, thereby transmitting the power generated from the engine or motor to the wheels.

[0003] The power transmission device for transmitting power is the drive axle, which is composed of a shaft and an inboard joint assembly assembled into an axle housing assembly comprising wheel bearings and an outboard joint. Thus, the drive axle not only transmits power from the engine or motor to the wheels, but also functions to support the disc and wheel-side loads by being fixed to the carrier.

[0004] Depending on driving conditions such as environmental conditions and driving load, these drive axles may not be able to transmit the power generated from the drive axle, or various dangerous situations may occur, such as component damage, noise or joint generation, or wheel separation.

[0005] However, when it comes to dangerous situations while driving, the driver can judge them in advance using his driving sense or recognize and deal with dangerous situations through maintenance. However, if he continues to drive without recognizing this, a driving accident may occur.

[0006] The matters described as background technology above are only intended to enhance understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

[0007] The problem to be solved by the present invention is to provide a drive axle equipped with a fault diagnosis system that senses driving factors such as vibration, temperature, and pressure generated according to driving conditions such as speed and load in an axle housing assembly to determine whether there is an abnormality.

[0008] In order to achieve the above object, a drive axle equipped with a fault diagnosis system according to the present invention comprises: an axle housing to which a drive shaft is coupled; a wheel bearing coupled to an outer surface of the axle housing; a mounting portion extending from an outer ring of the wheel bearing; and a sensing controller detachably provided on the mounting portion, which senses driving factors generated from the axle housing or the wheel bearing during driving of a mobility vehicle, and communicates with the vehicle to determine whether there is an abnormality based on the driving state of the vehicle and the sensed driving factors.

[0009] The mounting portion is characterized in that it extends from the outer ring of the wheel bearing toward the carrier or knuckle, and the sensing controller is mounted so as to be connected to the carrier or knuckle when mounted on the mounting portion.

[0010] The sensing controller is characterized by including a cover part mounted on a mounting part; a substrate part built into the cover part; a connecting part connected to the substrate part and electrically connected to a vehicle; a sensor part mounted on the substrate part for sensing a driving factor; and a control part for collecting driving information and driving factors of the vehicle and determining whether there is an abnormality.

[0011] The sensing controller is characterized in that it is mounted via a connecting member that is connected to the outer surface of the cover part and the mounting part and fixes the cover part and the mounting part.

[0012] The cover part is mounted to the mounting part with multiple fastening points, and the locations of the fastening points are determined using the following formula.

[0013] If 1.0 ≤ Z / B ≤ 1.5, 2 locations

[0014] If 1.5 ≤ Z / B ≤ 2.5, 3 places

[0015] If 2.5 ≤ Z / B ≤ 4.5, 4 locations

[0016] If 5.5 ≤ Z / B ≤ 7.5, 5 or more locations

[0017] Z: length of the cover

[0018] B: Width of the cover

[0019] It is characterized by a sealing member being provided between the cover part and the mounting part or around the base part.

[0020] The cover part is characterized by having a heat dissipation part formed of a plurality of fins on the outer surface.

[0021] It is characterized in that a connecting part and a control part are formed on one side of the substrate, and a sensor part is formed on the other side of the substrate.

[0022] The sensor unit includes an acceleration sensor and a temperature sensor, and the acceleration sensor is positioned at the exact center of the other side of the substrate unit, and is positioned so as to match the control unit on one side of the other side of the substrate unit.

[0023] The sensor unit is installed so as to face the wheel bearing from the mounting unit, and is characterized by being spaced apart from the mounting unit at a certain distance.

[0024] The wheel bearing is characterized by being composed of one or more of the following formulas.

[0025] 0.75 ≤ D1 / 2H ≤ 0.85

[0026] 0 ≤ L1 / X ≤ 2.0

[0027] 1.0 ≤ P / X ≤ 4.0

[0028] D1: Distance between the bearing balls of the wheel base from the center axis of the drive shaft

[0029] D2: PCD (Pitch Circle Diameter) of wheel bearing

[0030] H: Distance between the center axis of the drive shaft and the sensor unit

[0031] L1: Distance from the part of the cover that contacts the knuckle or carrier to the center of the wheel bearing

[0032] X: The distance from the part of the cover that contacts the knuckle or carrier to the center of the sensor part.

[0033] P: Pitch of bearing balls

[0034] The axle housing is characterized by being composed of one or more of the following formulas:

[0035] 0.45 ≤ D2 / 2H ≤ 0.55

[0036] 2.5 ≤ L2 / X ≤ 9.0

[0037] 2.5 ≤ L3 / X ≤ 8.5

[0038] D2: PCD (Pitch Circle Diameter) of the joint bearing connected to the drive shaft

[0039] H: Distance between the center axis of the drive shaft and the sensor unit

[0040] L2: The distance from the part of the cover that contacts the knuckle or carrier to the outermost surface of the hub housing.

[0041] L3: The distance from the center of the joint bearing connected to the drive shaft to the outermost surface of the hub housing.

[0042] X: The distance from the part of the cover that contacts the knuckle or carrier to the center of the sensor part.

[0043] The cover part is characterized by being composed of one or more of the following formulas.

[0044] 0.5 ≤ B / P ≤ 1.3

[0045] 3 ≤ Z / B ≤ 7

[0046] 0.2 ≤ Y / H ≤ 0.5

[0047] B: Width of the cover

[0048] P: Pitch of bearing balls

[0049] Z: length of the cover

[0050] Y: Height of the cover

[0051] H: Distance between the center axis of the drive shaft and the sensor unit

[0052] Meanwhile, a drive axle equipped with a fault diagnosis system according to another embodiment of the present invention includes: a stem portion connected to a drive shaft; an axle housing into which the stem portion is inserted and rotates together with the stem portion; a wheel bearing coupled to an outer circumferential surface of the axle housing; a mounting portion extended from an outer ring of the wheel bearing; and a sensing controller detachably provided to the mounting portion, which senses a driving factor generated from the axle housing or the wheel bearing during driving of a mobility vehicle, and communicates with the vehicle to determine whether there is an abnormality based on the driving state of the vehicle and the sensed driving factor.

[0053] A drive axle equipped with a fault diagnosis system having a structure as described above senses driving factors such as vibration, temperature, and pressure generated according to driving conditions such as speed and load in the axle housing assembly to determine whether there is an abnormality, thereby preventing dangerous situations during driving in advance and thus improving driving stability and reliability.

[0054] FIG. 1 is a drawing showing a drive axle equipped with a fault diagnosis system according to one embodiment of the present invention.

[0055] Figure 2 is a drawing showing one side of the substrate portion of the sensing controller according to the present invention.

[0056] Figure 3 is a drawing showing the other side of the substrate portion of the sensing controller according to the present invention.

[0057] Figure 4 is a drawing showing a wheel bearing and sensing controller according to the present invention.

[0058] Figure 5 is a drawing showing an embodiment according to two fastening points of the cover part in the present invention.

[0059] Figure 6 is a drawing showing an embodiment according to three fastening points of the cover part in the present invention.

[0060] Figure 7 is a drawing showing an embodiment according to four fastening points of the cover part in the present invention.

[0061] Figure 8 is a drawing showing an embodiment according to five fastening points of the cover part in the present invention.

[0062] Figure 9 is a drawing showing an embodiment according to six fastening points of the cover part in the present invention.

[0063] Figure 10 is a drawing showing a cover part and a mounting part according to the present invention.

[0064] Figure 11 is a drawing for explaining a sensor unit in a sensing controller according to the present invention.

[0065] Figure 12 is a drawing for explaining the numerical limitation range of a drive axle equipped with a fault diagnosis system according to the present invention.

[0066] FIG. 13 is a drawing showing a drive axle equipped with a fault diagnosis system according to another embodiment of the present invention.

[0067] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0068] The suffixes "module" and "part" used for components in the following description are given or used interchangeably only for the convenience of writing specifications, and do not have distinct meanings or roles in themselves.

[0069] In describing the embodiments disclosed in this specification, detailed descriptions of related known technologies will be omitted if it is determined that such detailed descriptions may obscure the gist of the embodiments disclosed in this specification. In addition, the attached drawings are provided solely to facilitate understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included within the spirit and technical scope of the present invention.

[0070] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0071] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0072] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0073] In this specification, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0074] Hereinafter, a drive axle equipped with a fault diagnosis system according to a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0075]

[0076] A drive axle equipped with a fault diagnosis system according to the present invention, as illustrated in FIG. 1, includes: an axle housing (100) to which a drive shaft (10) is coupled; a wheel bearing (200) coupled to an outer surface of the axle housing (100); a mounting portion (211) extended from an outer ring (210) of the wheel bearing (200); and a sensing controller (300) detachably provided on the mounting portion (211), which senses driving factors generated from the axle housing (100) or the wheel bearing (200) during driving of a mobility vehicle, and communicates with the vehicle to determine whether there is an abnormality based on the driving state of the vehicle and the sensed driving factors.

[0077] The drive shaft (10) is rotated by receiving engine driving power or motor driving power, and is provided so that the driving power is transmitted to the wheels.

[0078] The axle housing (100) is connected to the drive shaft (10) through a joint bearing (20) coupled to the end of the drive shaft (10), and the joint bearing (20) may be composed of an inner race (21) and a plurality of joint balls (22) provided on the inner race (21).

[0079] The axle housing (100) is provided with a joint bearing (20) on the inside, and the inner surface serves as an outer race constituting the joint bearing (20). In addition, the axle housing (100) is configured to also serve as a wheel hub for coupling the wheel and the knuckle.

[0080] A wheel bearing (200) is provided on the outer surface of the axle housing (100). The wheel bearing (200) is composed of an inner ring (220), an outer ring (210), and bearing balls (230) provided between the inner ring (220) and the outer ring (210). The outer ring (210) is coupled to a knuckle or carrier, and the axle housing (100) is coupled to a disk.

[0081] In particular, in the present invention, a sensing controller (300) is provided on the outer ring (210) of the wheel bearing (200). The sensing controller (300) is configured to sense one or more factors such as temperature, vibration, and pressure, and collects information according to driving factors generated through each component including the knuckle, carrier, and hub bearing.

[0082] Through this, the sensing controller (300) can predict whether each component is abnormal and its lifespan based on information on the driving conditions collected through communication with the vehicle and various driving factors collected.

[0083] That is, the sensing controller (300) stores at least one reference value among a temperature value, a vibration reference value, and a pressure reference value for determining whether there is an abnormality according to the driving condition, and the driving condition information collected through communication with the vehicle and the sensed driving factors can be compared with the reference values ​​to determine whether there is an abnormality.

[0084] In addition, if the sensing controller (300) determines that an abnormality has occurred, it can inform the driver of the situation through a warning sound or alert. For example, the presence of an abnormality detected through the sensing controller (300) can be notified to the driver through the cluster.

[0085]

[0086] Specifically describing the present invention described above, the mounting portion (211) extends from the outer ring (210) of the wheel bearing (200) toward the carrier or knuckle, and the sensing controller (300) can be mounted to be connected to the carrier or knuckle when mounted on the mounting portion (211).

[0087] That is, the mounting portion (211) is formed integrally with the outer ring (210) of the wheel bearing (200), and may be formed to extend from the outer ring (210) toward the carrier or knuckle. Accordingly, the sensing controller (300) may be connected to the carrier or knuckle when mounted on the mounting portion (211), so that the sensing controller (300) may receive driving factors according to any one of vibration, temperature, and pressure generated from surrounding components, including the wheel bearing (200), the carrier, or the knuckle.

[0088] In addition, in the case of the mounting portion (211), the outer ring (210) of the wheel bearing (200) is formed to have a straight section, thereby ensuring ease of mounting of the sensing controller (300) to the mounting portion (211).

[0089]

[0090] Meanwhile, as illustrated in FIGS. 2 to 4, the sensing controller (300) includes a cover portion (310) mounted on the mounting portion (211); a substrate portion (320) built into the cover portion (310); a connecting portion (330) connected to the substrate portion (320) and electrically connected to the vehicle; a sensor portion (340) mounted on the substrate portion (320) to sense driving factors; and a control portion (350) that collects driving information and driving factors of the vehicle to determine whether there is an abnormality.

[0091] In this way, the sensing controller (300) may have a substrate (320) built into the cover (310), and a connecting portion (330), a sensor portion (340), and a control portion (350) may be configured in the substrate portion (320). Here, the substrate portion (320) may further include a communication portion (360) for vehicle communication.

[0092] The cover portion (310) has an internal space so that the substrate portion (320) can be provided, and can form a sealed structure.

[0093] The connecting portion (330) is provided for electrical connection with the vehicle, and passes through the cover portion (310) to electrically connect the substrate portion (320) and the vehicle's wires.

[0094] The sensor unit (340) may be configured to measure at least one of vibration, temperature, and pressure, and a plurality of sensor units (340) may be configured for each driving factor. In the present invention, the sensor unit (340) may be configured with an acceleration sensor (341) for determining whether there is an abnormality due to vibration of surrounding components including the wheel bearing (200), and a temperature sensor (342) for determining the temperature of surrounding components including the wheel bearing (200). Various sensors may be applied to the sensor unit (340) according to a plurality of driving factors, and each sensor may be integrated and configured on the substrate unit (320).

[0095] Through this, the control unit (350) collects various information including driving factors input through the sensor unit (340) and wheel speed and torque of the vehicle input through the connecting unit (330) and communication unit (360), and analyzes and judges each piece of collected information to determine whether there is an abnormality in the surrounding parts including the wheel bearing (200).

[0096]

[0097] Meanwhile, the sensing controller (300) can be mounted via a coupling member (370) that is coupled to the outer surface of the cover part (310) and the mounting part (211) and fixes the cover part (310) and the mounting part (211).

[0098] The connecting member (370) may be configured in the form of a clip, and may be formed to surround the outer surface of the mounting portion (211) and a portion of the outer surface of the cover portion (310). As the connecting member (370) is connected to the mounting portion (211) and the cover portion (310), the mounting portion (211) and the cover portion (310) may be connected via the connecting member (370).

[0099] Due to this, the cover part (310) can be affected by driving factors including vibration and temperature generated from the wheel bearing (200) as it remains in contact with the mounting part (211), and the sensor part (340) provided inside the cover part (310) can sense this.

[0100]

[0101] Meanwhile, as shown in FIGS. 5 to 9, the cover part (310) is mounted on the mounting part (211) with a plurality of fastening points (A), and the locations of the fastening points (A) can be determined through the following equation.

[0102] Here, the cover part (310) can be bolted to the fastening point (A) and mounted on the mounting part (211). In addition, the location of the fastening point (A) can be determined by considering sealing properties, fixing properties, deformation, etc. when the cover part (310) is mounted on the mounting part (211).

[0103] The location of these fastening points (A) can be determined using the following equation.

[0104] If 1.0 ≤ Z / B ≤ 1.5, 2 locations

[0105] If 1.5 < Z / B ≤ 2.5, 3 locations

[0106] If 2.5 < Z / B ≤ 4.5, 4 locations

[0107] If 5.5 ≤ Z / B ≤ 7.5, 5 or more locations

[0108] Z: length of the cover

[0109] B: Width of the cover

[0110] According to this method, the location of the fastening point (A) can be determined, and the cover part (310) can be mounted on the mounting part (211) in a manner optimized for sealing properties, fixation properties, deformation, etc.

[0111] In addition, the position of the fastening point (A) at each location of the fastening point (A) can be set as shown in FIGS. 5 to 9.

[0112] For example, as shown in Fig. 5, when there are two fastening points (A), each fastening point (A) can be positioned spaced apart from each other at both ends of the cover part (310).

[0113] As shown in Fig. 6, when there are three fastening points (A), the fastening points (A) can be located at both ends of each cover part (310) and at the center thereof.

[0114] As shown in Fig. 7, when there are four fastening points (A), the fastening points (A) may be located at two locations each at each end of the cover part (310), or two fastening points (A) may be spaced apart from each end of the cover part (310) and the remaining two fastening points (A) may be located in the center.

[0115] In addition, as illustrated in Fig. 8, when there are five or more fastening points (A), two fastening points (A) may be located at each end of the cover part (310), and one fastening point (A) may be located in the center.

[0116] In addition, as illustrated in FIG. 9, when there are six or more fastening points (A), two fastening points (A) may be located at each end of the cover part (310), and two fastening points (A) may be located in the center.

[0117] In this way, when the location of the fastening point (A) is determined, the location of the fastening point (A) can be determined for each location of the fastening point (A), and the location of the fastening point (A) described above is not limited thereto, and the number and location can be configured in various ways.

[0118]

[0119] Meanwhile, as illustrated in Fig. 10, a sealing member (S) may be provided between the cover portion (310) and the mounting portion (211) or around the substrate portion (320).

[0120] Here, the sealing member (S) may be composed of an adhesive, a pad, a sealing ring, etc.

[0121] This sealing member (S) is interposed between the cover part (310) and the mounting part (211) to seal the gap between the cover part (310) and the mounting part (211). In addition, the sealing member (S) is configured to surround the periphery of the substrate part (320), thereby preventing moisture or foreign substances from moving to the substrate part (320) side even within the cover part (310).

[0122]

[0123] Meanwhile, as illustrated in FIG. 4, a heat dissipation part (311) composed of a plurality of fins may be formed on the outer surface of the cover part (310).

[0124] In this way, a heat dissipation part (311) is formed on the outer surface of the cover part (310), so that the inside of the cover part (310) can be cooled through the heat dissipation part (311).

[0125] This heat dissipation part (311) is formed at the furthest position from the cover part (310) to the substrate part (320), so that the sensing accuracy according to the temperature measurement through the sensor part (340) provided in the substrate part (320) can be maintained.

[0126] The heat dissipation part (311) can be composed of multiple fins and can be applied in various shapes such as protrusions and grooves.

[0127]

[0128] Meanwhile, as can be seen in FIGS. 2 and 3, a connecting portion (330) and a control portion (350) may be configured on one side of the substrate portion (320), and a sensor portion (340) may be configured on the other side of the substrate portion (320).

[0129] Through this, by arranging the sensor unit (340) independently from other components including the connecting unit (330) and the control unit (350) in the substrate unit (320), the sensor unit (340) can accurately measure the driving factor to be sensed by minimizing the influence of surrounding components.

[0130]

[0131] Meanwhile, in the present invention, the sensor unit (340) may include an acceleration sensor (341) and a temperature sensor (342).

[0132] In particular, in the case of the acceleration sensor (341), it is positioned at the exact center on the other side of the substrate (320), and can be positioned to match the control unit (350) on one side of the other side of the substrate (320).

[0133] In this way, the acceleration sensor (341) is positioned at the exact center of the other side of the substrate (320), thereby ensuring measurement accuracy according to vibration. In addition, measurement errors can be prevented as the acceleration sensor (341) is prevented from interfering with other components.

[0134] The temperature sensor (342) may be mounted on the other side of the substrate portion (320), and may be provided at a position matching the control portion (350) on one side of the substrate portion (320). Through this, the temperature sensor (342) can sense the heat of the control portion (350) as well as the heat transmitted from the wheel bearing (200), thereby determining whether the control portion (350) is damaged due to high temperature heat.

[0135]

[0136] Meanwhile, as illustrated in FIG. 11, the sensor unit (340) is installed so as to face the wheel bearing (200) from the mounting unit (211), and can be spaced apart from the mounting unit (211) by a certain distance.

[0137] In this way, the sensor unit (340) is installed in the direction from the mounting unit (211) toward the wheel bearing (200), making it easy to sense driving factors including vibration or temperature transmitted from the wheel bearing (200).

[0138] In addition, the sensor unit (340) may be installed in a direction toward the wheel bearing (200) from the mounting unit (211), but may be installed at a certain distance from the mounting unit (211). The distance between the sensor unit (340) and the mounting unit (211) may be 0.2 mm or less.

[0139] Through this, the sensor unit (340) can secure sensing accuracy of driving factors including vibration or temperature while minimizing interference in the internal space of the cover unit (310).

[0140]

[0141] Meanwhile, the optimal arrangement of the axle housing (100), wheel bearing (200), and cover part (310) of the sensing controller (300) according to the present invention can be configured as follows.

[0142] As illustrated in FIG. 12, the wheel bearing (200) may be configured with one or more of the following formulas.

[0143] 0.75 ≤ D1 / 2H ≤ 0.85

[0144] 0 ≤ L1 / X ≤ 2.0

[0145] 1.0 ≤ P / X ≤ 4.0

[0146] D1: Distance between the bearing balls of the wheel base from the center axis of the drive shaft

[0147] D2: PCD (Pitch Circle Diameter) of wheel bearing

[0148] H: Distance between the center axis of the drive shaft and the sensor unit

[0149] L1: Distance from the part of the cover that contacts the knuckle or carrier to the center of the wheel bearing

[0150] X: The distance from the part of the cover that contacts the knuckle or carrier to the center of the sensor part.

[0151] P: Pitch of bearing balls

[0152] In this manner, an optimized structure of the wheel bearing (200) and the sensing controller (300) can be achieved when checking for abnormalities in the parts of the wheel bearing (200).

[0153]

[0154] Meanwhile, the axle housing (100) may be configured with one or more of the following formulas.

[0155] 0.45 ≤ D2 / 2H ≤ 0.55

[0156] 2.5 ≤ L2 / X ≤ 9.0

[0157] 2.5 ≤ L3 / X ≤ 8.5

[0158] D2: PCD (Pitch Circle Diameter) of the joint bearing connected to the drive shaft

[0159] H: Distance between the center axis of the drive shaft and the sensor unit

[0160] L2: The distance from the part of the cover that contacts the knuckle or carrier to the outermost surface of the hub housing.

[0161] L3: The distance from the center of the joint bearing connected to the drive shaft to the outermost surface of the hub housing.

[0162] X: The distance from the part of the cover that contacts the knuckle or carrier to the center of the sensor part.

[0163] In this manner, when checking for abnormalities in the components of the axle housing (100), an optimized structure of the axle housing (100) and the sensing controller (300) can be achieved.

[0164]

[0165] Meanwhile, the cover part (310) may be configured with one or more of the following formulas.

[0166] 0.5 ≤ B / P ≤ 1.3

[0167] 3 ≤ Z / B ≤ 7

[0168] 0.2 ≤ Y / H ≤ 0.5

[0169] B: Width of cover part (310)

[0170] P: Pitch of bearing balls

[0171] Z: length of the cover

[0172] Y: Height of the cover

[0173] H: Distance between the center axis of the drive shaft and the sensor unit

[0174] In this way, the structure for checking for abnormalities in each component through the sensing controller (300) in the axle housing (100) can be optimized, and the ease of mounting of other components, including the sensing controller (300), can also be secured.

[0175]

[0176] Meanwhile, a drive axle equipped with a fault diagnosis system according to another embodiment of the present invention may include, as illustrated in FIG. 13, a stem portion (30) to which a drive shaft (10) is connected; an axle housing (100) into which the stem portion (30) is inserted and rotates together with the stem portion (30); a wheel bearing (200) coupled to an outer circumferential surface of the axle housing (100); a mounting portion (211) extended from an outer ring (210) of the wheel bearing (200); and a sensing controller (300) detachably provided on the mounting portion (211), which senses driving factors generated from the axle housing (100) or the wheel bearing (200) during driving of a mobility vehicle, and communicates with the vehicle to determine whether there is an abnormality based on the driving state of the vehicle and the sensed driving factors.

[0177] In this way, the drive shaft (10) and the axle housing (100) can be connected through the stem portion (30).

[0178] One end of the stem portion (30) is inserted through the axle housing (100) and is splined so that linear movement is possible but rotation is limited, thereby allowing rotational movement together with the axle housing (100). This stem portion (30) can be fixed to the axle housing (100) via a lock nut (N).

[0179] An end of a drive shaft (10) is inserted into the other end of the stem (30) and can be interconnected via a joint bearing (20).

[0180] In this structure, a sensing controller (300) is provided in the mounting portion (211) of the wheel bearing (200), so that the sensing controller (300) senses driving factors generated in each component including the wheel bearing (200) and the stem portion (30), and can predict whether there is an abnormality in each component and its lifespan based on the information according to the driving condition collected through communication with the vehicle and the various driving factors collected.

[0181]

[0182] A drive axle equipped with a fault diagnosis system having a structure as described above senses driving factors such as vibration, temperature, and pressure generated according to driving conditions such as speed and load in the axle housing (100) assembly to determine whether there is an abnormality, thereby preventing dangerous situations during driving in advance and thus improving driving stability and reliability.

[0183]

[0184] Although the present invention has been illustrated and described with respect to specific embodiments, it will be apparent to those skilled in the art that the present invention may be variously improved and modified without departing from the technical spirit of the invention as defined by the following claims.

[0185] The present invention relates to a drive axle equipped with a fault diagnosis system that secures driving stability and reliability by preemptively determining abnormal situations, including failure of power transmission, damage to parts, noise, and vehicle wheel separation, that occur in the drive axle.

Claims

1. Axle housing with drive shaft attached; A mounting portion extending from the outer ring of the wheel bearing; and A drive axle having a fault diagnosis system including a sensing controller that is detachably provided on a mounting portion, senses driving factors generated from an axle housing or wheel bearing during driving of a mobility vehicle, and communicates with a vehicle to determine whether there is an abnormality based on the driving state of the vehicle and the sensed driving factors.

2. In claim 1, The mounting portion extends from the outer ring of the wheel bearing toward the carrier or knuckle side, A drive axle having a fault diagnosis system, wherein the sensing controller is mounted so as to be connected to a carrier or knuckle when mounted on a mounting member.

3. In claim 1, The sensing controller comprises: a cover part mounted on the mounting part; A substrate portion built into the cover portion; A connecting part connected to the substrate and electrically connected to the vehicle; A sensor part mounted on the substrate for sensing driving factors; and A drive axle equipped with a fault diagnosis system, characterized by including a control unit that collects driving information and driving factors of the vehicle to determine whether there is an abnormality.

4. In claim 3, A drive axle equipped with a fault diagnosis system, characterized in that the sensing controller is mounted via a connecting member that is connected to the outer surface of the cover portion and the mounting portion and fixes the cover portion and the mounting portion.

5. In claim 3, A drive axle equipped with a fault diagnosis system, characterized in that the cover part is mounted on the mounting part with a plurality of fastening points, and the locations of the fastening points are determined by the following formula. 2 places if 1.0 ≤ Z / B ≤ 1.5 3 places if 1.5 ≤ Z / B ≤ 2.5 2.5 ≤ Z / B ≤ 4.5, 4 locations If 5.5 ≤ Z / B ≤ 7.5, 5 or more locations Z: Length of cover part B: Width of the cover 6. In claim 3, A drive axle equipped with a fault diagnosis system, characterized in that a sealing member is provided between a cover portion and a mounting portion or around a substrate portion.

7. In claim 3, A drive axle equipped with a fault diagnosis system, characterized in that a heat dissipation part formed with a plurality of fins on the outer surface of the cover part.

8. In claim 3, A drive axle equipped with a fault diagnosis system, characterized in that a connecting section and a control section are formed on one side of the substrate section, and a sensor section is formed on the other side of the substrate section.

9. In claim 8, The sensor section includes an acceleration sensor and a temperature sensor. A drive axle equipped with a fault diagnosis system, characterized in that the acceleration sensor is positioned at the exact center of the other side of the substrate and is positioned to match the control unit on one side of the other side of the substrate.

10. In claim 3, A drive axle equipped with a fault diagnosis system, wherein the sensor unit is installed so as to face the wheel bearing from the mounting unit and is spaced apart from the mounting unit at a certain distance.

11. In claim 3, A drive axle having a fault diagnosis system, wherein the wheel bearing comprises one or more of the following formulae: 0.75 ≤ D1 / 2H ≤ 0.85 0 ≤ L1 / X ≤ 2.0 1.0 ≤ P / X ≤ 4.0 D1: The distance between the bearing balls of the wheel base from the center axis of the drive shaft. D2: PCD (Pitch Circle Diameter) of wheel bearing H: Distance between the sensor section and the center axis of the drive shaft L1: The distance from the part of the cover that contacts the knuckle or carrier to the center of the wheel bearing. X: The distance from the part of the cover that touches the knuckle or carrier to the center of the sensor part. P: Pitch of bearing balls 12. In claim 3, A drive axle having a fault diagnosis system, wherein the axle housing comprises one or more of the following formulae: 0.45 ≤ D2 / 2H ≤ 0.55 2.5 ≤ L2 / X ≤ 9.0 2.5 ≤ L3 / X ≤ 8.5 D2: PCD (Pitch Circle Diameter) of the joint bearing connected to the drive shaft H: Distance between the sensor section and the center axis of the drive shaft L2: The distance from the part of the cover that contacts the knuckle or carrier to the outermost surface of the hub housing. L3: The distance from the center of the joint bearing connected to the drive shaft to the outermost surface of the hub housing. X: The distance from the part of the cover that touches the knuckle or carrier to the center of the sensor part.

13. In claim 3, A drive axle equipped with a fault diagnosis system, wherein the cover part is composed of one or more of the following formulas. 0.5 ≤ B / P ≤ 1.3 3 ≤ Z / B ≤ 7 0.2 ≤ Y / H ≤ 0.5 B: Width of the cover P: Pitch of bearing balls Z: Length of cover part Y: Height of cover part H: Distance between the sensor section and the center axis of the drive shaft 14. Stem section to which the drive shaft is connected; An axle housing into which a stem is inserted and rotates together with the stem; Wheel bearings bonded to the outer surface of the axle housing; A mounting portion extending from the outer ring of the wheel bearing; and A drive axle having a fault diagnosis system including a sensing controller that is detachably provided on a mounting portion, senses driving factors generated from an axle housing or wheel bearing during driving of a mobility vehicle, and communicates with a vehicle to determine whether there is an abnormality based on the driving state of the vehicle and the sensed driving factors.

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