Sensor protective cover, universal joint assembly and vehicle

Abstract

The utility model provides a sensor protective cover, universal joint assembly and vehicle, the sensor protective cover of the utility model comprises a protective cover main body and an installation support arranged on the protective cover main body, the installation support is used for installing the protective cover main body on a commutator shell, the protective cover main body can be arranged on a spherical shell of the movable universal joint in a sleeving manner and covers a gear ring on the spherical shell, and the protective cover main body is provided with a mounting part for mounting a rotating speed sensor. According to the sensor protective cover, the gear ring can be well protected, the gear ring can be effectively prevented from being knocked and falling off, the installation part for installing the rotating speed sensor is arranged on the protective cover body, the rotating speed sensor can be well protected, foreign matter collision and winding can be well prevented, and therefore normal rotating speed measurement can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a sensor protective cover. At the same time, the utility model also relates to a universal joint assembly using the sensor protective cover, and a vehicle equipped with the universal joint assembly. Background Art

[0002] Vehicle speed is one of the key factors affecting road safety. Excessive speed increases the risk of traffic accidents. Measuring vehicle speed is the basis for autonomous navigation and intelligent control of vehicles. By accurately measuring vehicle speed, drivers can understand the vehicle's movement status in real time, making it easier to make intelligent decisions and control according to road conditions and traffic rules, thereby improving driving safety and comfort.

[0003] The speed of a car is usually measured by a speed sensor and a gear ring. As an important component of the car speed measurement, the speed sensor generates a signal through the induction magnetic resistance or current change when the gear ring rotates, and then converts and calculates through electronic components to obtain the vehicle speed information.

[0004] Most of the models on the market now use a solution that uses a speed sensor in conjunction with a ring gear installed on the outside of the drive shaft. The advantage is that it can measure a wide range of vehicle speeds, with a maximum speed of 1000km / h. It is suitable for a wide range of vehicle models and has strong anti-interference capabilities.

[0005] The speed sensor is usually arranged on the front steering knuckle, and the ring gear is installed on the fixed universal joint on the outside of the drive shaft. Some models also arrange the speed sensor on the rear steering knuckle. However, no matter the speed sensor is installed on the front steering knuckle or the rear steering knuckle, there is a problem of high temperature of the steering knuckle caused by braking. Although some vehicles have installed independent heat dissipation and ventilation ducts, the temperature of the steering knuckle is high and still cannot meet the working temperature requirements of the sensor. Excessive temperature of the steering knuckle will cause the speed sensor to ablate and fail, resulting in the speed sensor being unable to measure the vehicle speed. This will have a great impact on the driving process and may even cause safety problems.

[0006] When the speed sensor is arranged on the steering knuckle and the ring gear is arranged on the fixed universal joint, the wheel hub bearing can cover the ring gear and the speed sensor, which can effectively prevent the ring gear and the sensor from being entangled and bumped by foreign objects. However, if the speed sensor and the ring gear are arranged close to the mobile universal joint, the sensor and the ring gear will be entangled and bumped by foreign objects because there is no shielding around the mobile universal joint. Utility Model Content

[0007] In view of this, the utility model aims to provide a sensor protection cover to better protect the speed sensor and the gear ring.

[0008] To achieve the above object, the technical solution of the present utility model is realized as follows:

[0009] A sensor protective cover, the sensor protective cover includes a protective cover body and a mounting bracket provided on the protective cover body;

[0010] The mounting bracket is used to mount the protective cover body on the commutator housing;

[0011] The protective cover body can be sleeved on the spherical shell of the mobile universal joint and wrapped outside the gear ring on the spherical shell;

[0012] The protective cover body is provided with a mounting portion for mounting a rotational speed sensor.

[0013] Further, the protective cover body includes a first cover body and a second cover body, and the first cover body and the second cover body are detachably connected;

[0014] The mounting bracket includes a first bracket provided on the first cover body and a second bracket provided on the second cover body, and the first bracket and the second bracket are respectively detachably connected to the commutator housing.

[0015] Further, the first bracket is in an "L" shape and includes a first mounting plate and a second mounting plate connecting the first mounting plate and the first cover body;

[0016] The first mounting plate is connected to the commutator housing through a first connecting member, and a reinforcing rib is connected between the first mounting plate and the first cover body;

[0017] A relief hole is provided on the reinforcing rib, and the relief hole can make way for the tool for installing the first connecting member.

[0018] Further, the second cover body is provided with a protruding portion protruding outward, and the second bracket is connected to the protruding portion;

[0019] The second bracket is in a "V" shape, and both ends of the second bracket are connected to the commutator housing through a second connecting member;

[0020] The mounting portion includes a sensor mounting hole provided at the connection portion between the second bracket and the protruding portion.

[0021] Further, the cross-sections of the first cover body and the second cover body are in a "C" shape, the two ends of the first cover body are respectively provided with first connecting plates, the two ends of the second cover body are respectively provided with second connecting plates, and the corresponding first connecting plates and second connecting plates are connected through a third connecting member.

[0022] Further, a limiting structure is provided between the first cover body and the second cover body, and the limiting structure is used to prevent the first cover body and the second cover body from moving axially along the toothed ring; and / or,

[0023] The distance L1 between the inner wall of the first cover body and the spherical shell is 1 mm - 3 mm, and the distance L2 between the inner wall of the second cover body and the spherical shell is 1 mm - 3 mm.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] (1) The sensor protective cover of the utility model can better protect the toothed ring, effectively prevent the toothed ring from being knocked off, and an installation part for installing a rotational speed sensor is provided on the protective cover body, which can better protect the rotational speed sensor, effectively prevent foreign objects from knocking and winding, and thus is beneficial to ensuring the normal progress of rotational speed measurement.

[0026] (2) The protective cover body includes a first cover body and a second cover body, which are separately manufactured and easy to install. When maintenance is required, the two can be disassembled, installed, and replaced separately, which is beneficial to improving the convenience and economy of maintenance, and can also flexibly select processing procedures, effectively reducing the production difficulty and working hours, and further reducing the production cost; through the provided first bracket and second bracket, it is convenient for the installation and arrangement of the first cover body and the second cover body, and is also beneficial to ensuring the stability after the first cover body and the second cover body are assembled, and is beneficial to ensuring the gap between the rotational speed sensor and the toothed ring, thus being beneficial to improving the accuracy of rotational speed measurement.

[0027] (3) The first bracket is in an "L" shape, and a reinforcing rib with a relief hole is provided, which can better ensure the structural strength of the first bracket itself, thus providing a stable installation foundation for the first cover body, effectively preventing the resonance and shaking of the protective cover body. The provided relief hole can facilitate the installation of the first bracket on the commutator housing without affecting the structural strength of the reinforcing rib, and can also play a certain role in weight reduction.

[0028] (4) A protruding part is provided on the second cover body, and the "V"-shaped second bracket is connected to the protruding part. On the one hand, it can provide stable support for the second cover body, effectively preventing the resonance and shaking of the protective cover body. On the other hand, the two ends of the second bracket are connected to the commutator housing, and the connection reliability is relatively high. The provided protruding part is beneficial to installing most of the rotational speed sensor inside the protective cover, can effectively prevent foreign objects from winding and knocking, and can play a better protective role for the rotational speed sensor.

[0029] (5) The cross-sections of the first cover body and the second cover body are in a "C" shape, so that the protective cover body has a relatively large accommodation space, can better protect the toothed ring, and is not easy to knock the toothed ring. This structure matches the structure at the toothed ring, and also makes the first cover body and the second cover body lighter in weight and higher in structural strength.

[0030] (6) A limiting structure is provided between the first cover body and the second cover body, which can effectively prevent the first cover body and the second cover body from moving relative to each other, thereby ensuring the gap between the speed sensor and the ring gear, and ensuring the measurement accuracy; limiting the distance between the inner wall of the first cover body and the spherical shell and the distance between the inner wall of the second cover body and the spherical shell can prevent the gap from being too large, thereby preventing the high-speed rotation of the ring gear from generating negative pressure and causing the suction of foreign matter, and also preventing the gap from being too small, causing the sensor protective cover to shake and cause interference problems.

[0031] Another object of the utility model is to provide a universal joint assembly, comprising a mobile universal joint, a commutator connected to the mobile universal joint, a speed detection unit disposed between the mobile universal joint and the commutator, and a sensor protective cover as described above;

[0032] The rotation speed detection unit includes a gear ring and a rotation speed sensor. The gear ring is fixed on the ball shell of the movable universal joint. The rotation speed sensor is installed on the commutator housing of the commutator corresponding to the gear ring. A gap is provided between the gear ring and the rotation speed sensor.

[0033] Furthermore, a first limiting unit is provided between the gear ring and the spherical shell, and the first limiting unit is used to limit the circumferential rotation of the gear ring around the spherical shell; and / or,

[0034] A second limiting unit is provided between the gear ring and the spherical shell, and the second limiting unit is used to limit the gear ring from being separated from the spherical shell along the axial direction of the spherical shell.

[0035] Furthermore, the spherical shell is provided with a centering shaft, the reversing shell is provided with a centering hole, and the centering shaft is inserted into the centering hole;

[0036] The matching dimension length of the centering shaft and the centering hole in the axial direction of the centering shaft is 43mm-58mm; the radial tolerance range of the centering hole is -0.01mm to 0.2mm; the radial tolerance range of the centering shaft is -0.07mm to -0.01mm.

[0037] The universal joint assembly described in the utility model arranges the ring gear on the ball shell of the mobile universal joint, and arranges the speed sensor on the commutator housing. Compared with the existing solution in which the ring gear is arranged on the fixed universal joint and the speed sensor is arranged on the steering knuckle, the problem of failure of the speed sensor in a high temperature environment caused by excessive temperature at the steering knuckle position can be effectively avoided.

[0038] The first limit unit is set between the gear ring and the spherical shell, which can effectively prevent the gear ring from rotating circumferentially around the spherical shell, which is conducive to ensuring the measurement accuracy of the speed sensor. Since the gear ring is easily subjected to circumferential force during collision, the first limit unit can better prevent the gear ring from falling when it is bumped. The second limit unit can effectively prevent the gear ring from detaching from the spherical shell along the axial direction of the spherical shell, which is conducive to ensuring the stability and reliability of the installation of the gear ring on the spherical shell, thereby ensuring the measurement accuracy of the speed sensor and facilitating the speed measurement unit to stably and smoothly perform the speed measurement work.

[0039] Limiting the axial matching length of the centering shaft and the centering hole is beneficial to reducing the swing amplitude of the centering shaft. Since the ring gear and the centering shaft are both arranged on the spherical shell, it is equivalent to preventing the ring gear from shaking, which is beneficial to ensuring the clearance requirement between the ring gear and the sensor, thereby improving the measurement accuracy of the speed measurement unit.

[0040] Limiting the radial tolerance range of the centering hole and the radial tolerance range of the centering shaft is mainly a frequency avoidance design, which can prevent the frequency resonance problem between the mounting bracket and the rest of the vehicle components, thereby effectively preventing the problem of collision with the gear ring caused by the resonance of the mounting bracket; limiting the radial tolerance range of the centering hole and the centering shaft is also beneficial to reducing the swing amplitude of the centering shaft. Since both the gear ring and the centering shaft are arranged on the spherical shell, it is equivalent to preventing the gear ring from shaking, which is beneficial to ensure the clearance requirement between the gear ring and the sensor, thereby improving the measurement accuracy of the speed measurement unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0042] Figure 1 This is a schematic diagram of the structure of the sensor protective cover in the application state according to the first embodiment of the present utility model;

[0043] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective;

[0044] Figure 3 This is a schematic structural diagram of the commutator housing according to the first embodiment of the utility model;

[0045] Figure 4 This is a schematic diagram of the structure of the sensor protection cover according to the first embodiment of the utility model installed on the commutator housing;

[0046] Figure 5 This is a cross-sectional view of the sensor protection cover according to the first embodiment of the utility model installed on the commutator housing;

[0047] Figure 6 This is a schematic structural diagram of the first cover body and the first bracket according to the first embodiment of the present utility model;

[0048] Figure 7 for Figure 6 Schematic diagram of the structure from another perspective;

[0049] Figure 8 This is a schematic structural diagram of the second cover body and the second bracket according to the first embodiment of the present utility model;

[0050] Fig. 9 for Figure 8 Schematic diagram of the structure from another perspective;

[0051] Fig.10 This is a schematic structural diagram of the transmission half-shaft assembly according to the first embodiment of the utility model;

[0052] Fig.11 This is a schematic diagram of the structure of the assembly of the ball shell and the gear ring according to the first embodiment of the utility model;

[0053] Fig.12 This is a schematic diagram of the structure of the spherical shell according to the first embodiment of the utility model;

[0054] Fig.13 for Fig.11 Right view of;

[0055] Fig.14 This is a schematic structural diagram of the spherical shell according to the first embodiment of the utility model from another viewing angle;

[0056] Fig.15 It is a schematic structural diagram of the gear ring described in Embodiment 1 of the utility model from another perspective.

[0057] Description of reference numerals:

[0058] 11. Protective cover body;

[0059] 1101, first cover body; 11011, first inner wall; 11012, first connecting plate; 11013, limiting structure;

[0060] 1102, second cover body; 11021, second inner wall; 11022, second connecting plate; 11023, protruding portion;

[0061] 1103, installation department;

[0062] 1201, first bracket; 12011, first mounting plate; 12012, second mounting plate;

[0063] 1202, second bracket;

[0064] 1. Mobile universal joint; 101. Ball shell; 1011. Centering shaft;

[0065] 2. Commutator; 201. Commutator housing; 2011. Centering hole;

[0066] 3. Fixed universal joint; 4. Wheel hub bearing; 5. Ring gear; 6. Speed ​​sensor;

[0067] 801, limiting protrusion; 802, limiting groove;

[0068] 9. Limiting member; 10. Steering knuckle; 13. Half shaft; 14. First connecting member; 1401. First connecting hole; 15. Second connecting member; 1501. Second connecting hole; 16. Reinforcing rib; 1601. Clearance hole; 18. Third connecting member. DETAILED DESCRIPTION

[0069] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0070] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0071] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0072] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0073] Embodiment 1

[0074] The present embodiment relates to a sensor protection cover, which can effectively protect the rotation speed measurement component, effectively prevent the gear ring 5 from knocking and falling, and facilitate the smooth progress of the rotation speed measurement work.

[0075] Based on the above design concept, an exemplary structure of the sensor protective cover in the application state of this embodiment is as follows: Figure 1 , Figure 2 and Figure 5 As shown, the structural schematic diagram of the sensor protective cover of this embodiment is as shown in Figures 6 to 9 As shown, in terms of overall structure, the sensor protective cover mainly includes a protective cover body 11 and a mounting bracket arranged on the protective cover body 11.

[0076] Specifically, the mounting bracket is used to install the protective cover body 11 on the commutator housing 201. The protective cover body 11 can be mounted on the ball shell 101 of the mobile universal joint 1 and cover the outside of the ring gear 5 on the ball shell 101. The protective cover body 11 is provided with a mounting portion 1103 for installing the speed sensor 6, thereby effectively protecting the ring gear 5 and the speed sensor 6.

[0077] As a preferred embodiment, Figure 4 and Figure 5 As shown, the protective cover body 11 is in an annular shape as a whole, and includes a semicircular first cover body 1101 and a second cover body 1102, and the first cover body 1101 and the second cover body 1102 are detachably connected. Here, the protective cover body 11 includes the first cover body 1101 and the second cover body 1102, and the two are made separately. When maintenance is needed, the two can be disassembled and assembled separately, which is conducive to improving the convenience of maintenance.

[0078] The specific connection method of the first cover body 1101 and the second cover body 1102 will be described in detail below. It should be understood that the protective cover body 11 in this embodiment can also be an integrated structure, but it is inconvenient to install compared to the structure with a split arrangement, consumes more man-hours, and leads to higher production costs. In addition, the protective cover body 11 can be divided into a semicircular first cover body 1101 and a second cover body 1102, and can also be split in other ways, so that it is convenient to install on the commutator housing 201 and cover the outside of the gear ring 5.

[0079] In a preferred embodiment, the mounting bracket includes a first bracket 1201 disposed on the first cover body 1101 and a second bracket 1202 disposed on the second cover body 1102 . The first bracket 1201 and the second bracket 1202 are respectively detachably connected to the commutator housing 201 .

[0080] Such arrangement, through the arrangement of the first bracket 1201 and the second bracket 1202, facilitates the installation and arrangement of the first cover body 1101 and the second cover body 1102, and is also beneficial to ensure the stability of the first cover body 1101 and the second cover body 1102 after being assembled, and is beneficial to ensure the gap between the speed sensor 6 and the ring gear 5, thereby facilitating the improvement of the accuracy of the speed measurement.

[0081] In a preferred embodiment, after the first cover body 1101 and the second cover body 1102 are constructed to form a complete protective cover body 11, the first bracket 1201 and the second bracket 1202 are respectively placed on two opposite sides of the protective cover body 11, which is beneficial to provide stable support for the first cover body 1101 and the second cover body 1102, and can prevent the protective cover body 11 from shaking due to factors such as wind resistance and vehicle resonance, and can effectively ensure the normal operation of the wheel speed sensor 6.

[0082] It should be understood that, in addition to simultaneously arranging the first bracket 1201 and the second bracket 1202 on the protective cover body 11 , it is also feasible to arrange the first bracket 1201 only on the first cover body 1101 , or to arrange the second bracket 1202 only on the second cover body 1102 .

[0083] As a preferred embodiment, the first bracket 1201 is in an "L" shape and includes a first mounting plate 12011 and a second mounting plate 12012. The first mounting plate 12011 extends radially outwardly of the shield body 11, and the second mounting plate 12012 extends axially to one side of the shield body 11, and the two ends of the second mounting plate 12012 are respectively connected to the first mounting plate 12011 and the first cover body 1101, and the first mounting plate 12011 is connected to the commutator housing 201 through the first connecting member 14.

[0084] like Figures 3 to 5 and Figure 6 and Figure 7 As shown, two first connecting holes 1401 are provided on the commutator housing 201, and two first connecting holes 1401 are provided on the first mounting plate 12011. The two first connecting holes 1401 on the commutator housing 201 and the two first connecting holes 1401 on the first mounting plate 12011 correspond one to one, and the two first connecting holes 1401 are arranged at radial intervals along the protective cover body 11, so that the first bracket 1201 can be installed on the commutator housing 201 by passing through the first connecting member 14 of the two corresponding first connecting holes 1401.

[0085] Here, the first connecting member 14 is preferably an existing bolt or screw, and can adopt an existing standard part with low cost. The first connecting member 14 is two, which can prevent the first bracket 1201 from rotating around the bolt due to insufficient freedom restriction.

[0086] It should be understood that, in addition to being connected with the first connecting member 14, the first bracket 1201 and the commutator housing 201 can also be connected by other means, such as welding. In addition to bolts or screws, the first connecting member 14 can also adopt other structures, such as rivets, snaps, etc., and a matching connecting structure is provided on the commutator housing 201, so that the first cover body 1101 can be installed on the commutator housing 201.

[0087] As a preferred embodiment, a reinforcing rib 16 is connected between the first mounting plate 12011 and the first cover body 1101. As in the above structure, the first bracket 1201 is in an "L" shape, and a reinforcing rib 16 with a makeshift hole 1601 is provided. This can better ensure the structural strength of the first bracket 1201 itself, thereby providing a stable installation foundation for the first cover body 1101, and effectively preventing the protective cover body 11 from resonating and shaking.

[0088] In a preferred embodiment, the reinforcing rib 16 is specifically in the shape of a plate, one end of which is connected between the two first connectors 14, and the other end is connected to the first cover 1101. In a preferred embodiment, a clearance hole 1601 is provided on the reinforcing rib 16, and the clearance hole 1601 can make way for the tool for installing the first connector 14. In this embodiment, the clearance is specifically made for the first connector 14 close to the first cover 1101. The clearance hole 1601 provided here can facilitate the installation of the first bracket 1201 on the commutator housing 201 without affecting the structural strength of the reinforcing rib 16, and can also play a certain role in reducing weight.

[0089] As a preferred embodiment, Figures 3 to 5 and Figure 8 and Fig. 9 As shown, the second cover body 1102 is provided with a protruding portion 11023 protruding outward, the second bracket 1202 is connected to the protruding portion 11023, the second bracket 1202 is "V" shaped, and both ends of the second bracket 1202 are connected to the commutator housing 201 through the second connecting member 15.

[0090] In a preferred embodiment, the middle portion of the commutator housing 201 is connected to the protrusion 11023, a second connecting hole 1501 is provided on the commutator housing 201, and second connecting holes 1501 are respectively provided near both ends of the second bracket 1202. The second connecting holes 1501 on the commutator housing 201 and the second connecting holes 1501 on the second bracket 1202 correspond one to one, so that the second cover 1102 can be installed on the commutator housing 201 by passing through the second connecting member 15 in the corresponding second connecting hole 1501.

[0091] It should be noted here that in addition to being connected to the commutator housing 201 by means of the second connecting member 15, the second bracket 1202 can also be connected by other means, such as welding. In addition to bolts or screws, the second connecting member 15 can also adopt other structures, such as rivets, snaps, etc., and a matching connection structure is provided on the commutator housing 201, so that the second cover body 1102 can be installed on the commutator housing 201.

[0092] In addition, by providing two second connecting members 15 , it is possible to prevent the second bracket 1202 from rotating around the second connecting member 15 due to insufficient freedom restriction.

[0093] In a preferred embodiment, the mounting portion 1103 includes a sensor mounting hole provided at the connecting portion of the second bracket 1202 and the protruding portion 11023. In this embodiment, there are two sensor mounting holes to facilitate the installation of the existing rotational speed sensor 6.

[0094] In the above structure, by providing the protruding portion 11023 on the second housing 1102, most of the rotational speed sensor 6 can be installed inside the protective cover, which can better prevent foreign objects from winding and bumping, and can play a better protective role for the rotational speed sensor 6.

[0095] Connecting the "V"-shaped second bracket 1202 to the protruding portion 11023 can, on the one hand, provide stable support for the second housing 1102 and effectively prevent the main body 11 of the protective cover from resonating and shaking. On the other hand, the two ends of the second bracket 1202 are connected to the commutator housing 201, with relatively high connection reliability, which is conducive to ensuring the stability and reliability of the installation of the rotational speed sensor 6, thereby facilitating the guarantee of the clearance requirement between the gear ring 5 and the rotational speed sensor 6, and can better improve the measurement accuracy of the rotational speed measurement unit.

[0096] In this embodiment, integrating the first housing 1101 and the first bracket 1201 into an integrated structure, and integrating the second housing 1102 and the second bracket 1202 into an integrated structure is convenient for processing. When one of them is damaged, it is not necessary to disassemble the drive shaft for replacement, which can better reduce the maintenance man-hours and thus reduce the maintenance cost.

[0097] As a preferred embodiment, the cross-sections of the first housing 1101 and the second housing 1102 are in a "C" shape. The two ends of the first housing 1101 are respectively provided with first connecting plates 11012, and the two ends of the second housing 1102 are respectively provided with second connecting plates 11022. The corresponding first connecting plates 11012 and second connecting plates 11022 are connected by a third connecting member 18.

[0098] Here, making the cross-sections of the first housing 1101 and the second housing 1102 in a "C" shape enables the main body 11 of the protective cover to have a relatively large accommodation space, which can play a better protective role for the gear ring 5 and is not easy to bump the gear ring 5. This structure matches the structure at the gear ring 5, and also makes the first housing 1101 and the second housing 1102 lighter in weight and higher in structural strength.

[0099] It should be understood that the cross-sections of the first housing 1101 and the second housing 1102 can be other shapes in addition to the "C" shape, such as semi-circular, U-shaped, etc.

[0100] In a preferred embodiment, first connecting plates 11012 are respectively provided at both ends of the first cover body 1101, and the first connecting plates 11012 at both ends extend radially outward of the first cover body 1101, and second connecting plates 11022 are respectively provided at both ends of the second cover body 1102, and the second connecting plates 11022 at both ends extend radially outward of the second cover body 1102.

[0101] The first connecting plate 11012 and the second connecting plate 11022 at the corresponding ends are respectively provided with third connecting holes so as to be connected by the third connecting member 18 passing through the third connecting holes. Here, the third connecting member 18 can be, for example, an existing bolt or screw to better ensure the connection reliability of the first cover body 1101 and the second cover body 1102. It should be understood that in addition to being connected in the above manner, the first cover body 1101 and the second cover body 1102 can also be connected in other ways, such as plug-in, snap-on, etc.

[0102] As a preferred embodiment, a limiting structure 11013 is provided between the first cover body 1101 and the second cover body 1102. The limiting structure 11013 is used to prevent the first cover body 1101 and the second cover body 1102 from moving axially along the ring gear 5, which can effectively prevent the first cover body 1101 and the second cover body 1102 from moving relative to each other due to insufficient friction in the mating parts, which is beneficial to ensuring the gap between the speed sensor 6 and the ring gear 5, ensuring the measurement accuracy, and preventing the protective cover body 1102 from hitting the ring gear 5 due to the dislocation of the protective cover body 1102.

[0103] As in this embodiment, still refer to Figures 6 to 9 As shown, the limiting structure 11013 of this embodiment is specifically a flange arranged on the first connecting plate 11012, and flanges are provided on both sides of each first connecting plate 11012 to clamp the second connecting plate 11022 on the corresponding side between the flanges on both sides, which has a better limiting effect and is relatively simple to process.

[0104] It should be understood that, in addition to being provided on the first connecting plate 11012, the limiting structure 11013 can also be provided at other locations, such as providing a flange on the second connecting plate 11022. In this case, there is no need to provide a flange on the first connecting plate 11012. For another example, the limiting structure 11013 can be provided on the first cover body 1101 and the second cover body 1102. In addition to being a flange, the limiting structure 11013 can also be a limiting column and a limiting hole. For example, the limiting column is provided on the first connecting plate 11012, and the limiting hole is provided on the second connecting plate 11022. This can limit the relative displacement of the first cover body 1101 and the second cover body 1102 along their own axis.

[0105] As a preferred embodiment, the distance between the inner wall of the first cover body 1101 and the spherical shell 101 is 1mm-3mm, such as 1mm, 2mm, 3mm, etc., and the distance between the inner wall of the second cover body 1102 and the spherical shell 101 is 1mm-3mm, such as 1mm, 2mm, 3mm.

[0106] Here, limiting the distance between the inner wall of the first cover body 1101 and the spherical shell 101 and the distance between the inner wall of the second cover body 1102 and the spherical shell 101 can prevent the gap from being too large, thereby preventing the high-speed rotation of the ring gear 5 from generating negative pressure and causing the suction of foreign matter, and can also prevent the gap from being too small, causing the sensor protective cover to shake and cause interference problems.

[0107] like Figure 6 and Fig. 9 As shown, for the convenience of description, the two inner walls on the first cover body 1101 are called first inner walls 11011, and the two inner walls on the second cover body 1102 are called second inner walls 11021. The distance between each first inner wall 11011 and each second inner wall 11021 and the spherical shell 101 is within the range of 1mm-3mm.

[0108] The sensor protective cover of the present embodiment can better protect the gear ring 5 and can effectively prevent the gear ring 5 from being knocked and falling off. The mounting portion 1103 for mounting the speed sensor 6 is provided on the protective cover body 11, which can better protect the speed sensor 6 and can better prevent foreign objects from knocking and entanglement, thereby ensuring the normal speed measurement.

[0109] Embodiment 2

[0110] The present embodiment relates to a universal joint assembly, which can effectively solve the problem that the speed sensor 6 cannot work due to high brake temperature. By applying a sensor protective cover as in the first embodiment, it is beneficial to better protect the speed sensor 6 and the ring gear, thereby facilitating stable speed measurement.

[0111] Based on the above design concept, an exemplary structure of the universal joint assembly in the application state of the present embodiment is as follows: Fig.10 As shown, in terms of overall structure, the universal joint assembly mainly includes a mobile universal joint 1, a commutator 2 and a speed detection unit, and the commutator 2 is connected to the mobile universal joint 1, and the speed detection unit is arranged between the mobile universal joint 1 and the commutator 2.

[0112] In order to better understand the universal joint assembly of this embodiment, refer to Fig.10 The structure of the transmission half shaft assembly is explained. Fig.10 In the state shown, the left side faces the outside of the vehicle and the right side is located approximately in the middle in the vehicle width direction.

[0113] The middle of the transmission half-shaft assembly is a half-shaft 13, the left end of which is connected to the fixed universal joint 3 and the wheel hub bearing 4 in sequence, and the wheel hub bearing 4 is also connected to the steering knuckle 10 for steering, while the right end of the half-shaft 13 is connected to the movable universal joint 1 and the commutator 2 in sequence, and the movable universal joint 1 can slide a certain distance in the axial direction of the half-shaft 13. The commutator 2 mentioned here can be, for example, an existing reducer, and the various components of the transmission half-shaft assembly mentioned here and the connection relationship between the various components can refer to the structure in the prior art.

[0114] In the existing detection unit for detecting wheel speed, the ring gear 5 is generally installed on the fixed universal joint 3, and the speed sensor 6 is installed on the steering knuckle 10. Since the steering knuckle 10 and the fixed universal joint 3 are arranged close to the outside in the width direction of the vehicle, and the temperature of the steering knuckle 10 generally increases due to braking, the high temperature of the steering knuckle 10 will cause the speed sensor 6 to not work normally, resulting in the problem of high-temperature failure due to improper arrangement of the speed sensor 6.

[0115] In order to avoid the problem of failure of the speed sensor 6 due to high temperature, in this embodiment, the speed detection unit includes a ring gear 5 and a speed sensor 6. The ring gear 5 is fixed on the ball shell 101 of the mobile universal joint 1, and the speed sensor 6 is installed on the commutator housing 201 of the commutator 2 corresponding to the ring gear 5. The speed sensor 6 preferably adopts an existing Hall-type speed sensor.

[0116] The structure of the ball shell 101 can refer to Figure 11 to Figure 12 As shown in the figure, the structure of the ball shell 101 refers to the structure in the prior art. In this embodiment, the gear ring 5 is mainly press-fitted on the ball shell 101. The ball shell 101 has a rotating shaft located on one side of itself, and the rotating shaft is used to be inserted into the commutator housing 201 and is connected to the rotating shaft in the commutator housing 201 through, for example, a gear connection.

[0117] The structure of the gear ring 5 can refer to Figures 13 to 15 As shown, it is in the shape of a circular ring as a whole, with a full circle of teeth on the outer peripheral wall and the following limiting protrusions 801 on the inner peripheral wall.

[0118] Since the periphery of the ball shell 101 of the mobile universal joint 1 is not blocked, if the conventional interference fit method is used, the ring gear 5 is easily knocked off from the ball shell 101. Therefore, as a preferred embodiment, when the ring gear 5 is interference fit on the ball shell 101, a first limiting unit is provided between the ring gear 5 and the ball shell 101, and the first limiting unit is used to limit the circumferential rotation of the ring gear 5 around the ball shell 101.

[0119] Here, a first limit unit is set between the ring gear 5 and the spherical shell 101, which can effectively prevent the ring gear 5 from circumferentially rotating around the spherical shell 101, which is beneficial to ensuring the measurement accuracy of the speed sensor 6. Since the ring gear 5 is easily subjected to circumferential force during the collision process, the first limit unit is set to better prevent the ring gear 5 from falling when it is bumped.

[0120] As a preferred embodiment, the first limiting unit includes a limiting protrusion 801 and a limiting groove 802. The limiting groove 802 is arranged on the ball shell 101, and the limiting protrusion 801 is arranged on the inner wall of the ring gear 5. The limiting protrusion 801 can be inserted into the limiting groove 802 to limit the circumferential rotation of the ring gear 5 around the ball shell 101.

[0121] In the above structure, the first limiting unit is set as a limiting protrusion 801 and a limiting groove 802. The limiting structure is simple and the limiting method has high reliability. The limiting protrusion 801 is set on the inner wall of the gear ring 5, which is convenient for processing. The limiting groove 802 is set on the ball shell 101, which is convenient for processing.

[0122] As a preferred embodiment, there are multiple first limiting units, and the multiple first limiting units are arranged at intervals in the circumferential direction of the gear ring 5. Here, the first limiting units are set to be multiple, and the multiple first limiting units are arranged at intervals in the circumferential direction of the gear ring 5, which is conducive to improving the reliability of the first limiting units. At the same time, it can also better disperse the interaction force between the gear ring 5 and the ball shell 101, so that when the gear ring 5 is hit by an external force, the impact force can be more evenly transmitted to different positions of the circumference of the ball shell 101, which can prevent the ball shell 101 from being damaged by force, and help to extend the service life of the ball shell 101.

[0123] In this embodiment, the number of the first limiting units is four, and the four first limiting units are arranged at uniform intervals in the circumferential direction of the gear ring 5, so as to balance the circumferential force of the gear ring 5. Preferably, the number of the first limiting units is an even number, which is convenient for uniform circumferential arrangement of the gear ring 5. It should be understood that the four first limiting units can also be arranged at uneven intervals in the circumferential direction of the gear ring 5, or the number of the first limiting units can also be set to other values, such as one, two, three, five, etc.

[0124] In a preferred embodiment, the cross-sectional shape of the limiting groove 802 is a square, and the shape of the limiting protrusion 801 is consistent with the cross-sectional shape of the limiting groove 802, which is also a square. It has a good limiting effect and can effectively prevent the gear ring 5 from being knocked off. It should be understood that the shape of the limiting groove 802 is also feasible, such as a triangle, a semicircle, etc.

[0125] In a preferred embodiment, the recessed depth of the limiting groove 802 is greater than the protruding height of the limiting protrusion 801, so as to facilitate the pressing of the ring gear 5 onto the ball shell 101. At the same time, it can also avoid excessive deformation of the ring gear 5 at the limiting protrusion 801 during installation, thereby preventing the gap between the ring gear 5 and the speed sensor 6 from not meeting the requirements.

[0126] As a preferred embodiment, Figure 5 As shown, a second limiting unit is provided between the gear ring 5 and the spherical shell 101, and the second limiting unit is used to limit the gear ring 5 from being separated from the spherical shell 101 along the axial direction of the spherical shell 101. In this structure, the second limiting unit provided can effectively prevent the gear ring 5 from being separated from the spherical shell 101 along the axial direction of the spherical shell 101, which is conducive to ensuring the stability and reliability of the installation of the gear ring 5 on the spherical shell 101, thereby ensuring the measurement accuracy of the speed sensor 6, and facilitating the speed measurement unit to stably and smoothly perform the speed measurement work.

[0127] As a preferred embodiment, the second limiting unit includes a limiting plug-in slot provided on the ball shell 101, and a limiting member 9 inserted in the limiting plug-in slot. The limiting member 9 can cover one side of the ring gear 5 to limit the ring gear 5 from detaching from the ball shell 101 along the axial direction of the ball shell 101.

[0128] In the above structure, the second limiting unit is set as a limiting plug-in slot and a limiting member 9. The limiting structure is simple. The limiting member 9 is covered on one side of the ring gear 5. The limiting effect is good and the limiting reliability is high. The limiting plug-in slot is set on the ball shell 101. The processing method is relatively simple. The setting limit member 9 can adopt existing standard parts such as bolts and screws, and the cost is low. The shape of the limiting slot is not specifically limited in this embodiment, and it can cooperate with the limiting member 9 to prevent the ring gear 5 from detaching from the ball shell 101 along the axial direction of the ball shell 101.

[0129] The installation method of the rotation speed sensor 6 can refer to the description in the first embodiment. The rotation speed sensor 6 is specifically installed in the sensor installation hole on the second bracket 1202 .

[0130] As a preferred embodiment, Figure 11 to Figure 12 As shown, a centering shaft 1011 is provided on the ball shell 101, and a centering hole 2011 is provided in the commutator housing 201. The centering hole 2011 is specifically provided on a component in the commutator housing 201, and the component here refers to the existing structure that matches the centering shaft 1011. The centering shaft 1011 is inserted into the centering hole 2011, and the length of the matching dimension L of the centering shaft 1011 and the centering hole 2011 in the axial direction of the centering shaft 1011 is 43mm-58mm, such as 43mm, 47mm, 50mm, 54mm, 58mm, etc.

[0131] Here, the length of the axial matching dimension L of the centering shaft 1011 and the centering hole 2011 is limited to the centering shaft 1011, which is beneficial to reducing the swing amplitude of the centering shaft 1011. Since the ring gear 5 and the centering shaft 1011 are both arranged on the spherical shell 101, it is equivalent to preventing the ring gear 5 from shaking, which is beneficial to ensuring the clearance requirement between the ring gear 5 and the speed sensor 6, thereby improving the measurement accuracy of the speed measurement unit.

[0132] As a preferred embodiment, the radial tolerance range of the centering hole 2011 is -0.01mm to 0.2mm, such as -0.01mm, 0mm, 0.1mm, 0.2mm, etc. The radial tolerance range of the centering shaft 1011 is -0.07mm to -0.01mm, such as -0.07mm, -0.05mm, -0.03mm, -0.01mm.

[0133] In the above structure, the radial tolerance range of the centering hole 2011 and the radial tolerance range of the centering shaft 1011 are limited, mainly for frequency avoidance design, which can prevent the frequency resonance problem between the mounting bracket and other parts of the vehicle, thereby effectively preventing the problem of collision with the gear ring 5 caused by the resonance of the mounting bracket.

[0134] Limiting the radial tolerance range of the centering hole 2011 and the centering shaft 1011 is also beneficial to reducing the swing amplitude of the centering shaft 1011. Since the ring gear 5 and the centering shaft 1011 are both arranged on the spherical shell 101, it is equivalent to preventing the ring gear 5 from shaking, which is beneficial to ensuring the clearance requirement between the ring gear 5 and the speed sensor 6, thereby improving the measurement accuracy of the speed measurement unit.

[0135] In the universal joint assembly of this embodiment, the ring gear 5 is arranged on the ball shell 101 of the mobile universal joint 1, and the speed sensor 6 is arranged on the commutator housing 201. Compared with the existing solution of arranging the ring gear 5 on the fixed universal joint 3 and the speed sensor 6 on the steering knuckle 10, the problem of failure of the speed sensor 6 in a high temperature environment caused by excessive temperature at the steering knuckle 10 can be effectively avoided.

[0136] In addition, the universal assembly of this embodiment and the sensor protection cover of the first embodiment have the same beneficial effects as compared with the prior art, which will not be described in detail here.

[0137] Meanwhile, the present embodiment also relates to a vehicle, on which the above universal joint assembly is provided. The vehicle of the present embodiment, by applying the above universal joint assembly, has the same beneficial effects as the universal joint assembly of the first embodiment relative to the prior art.

[0138] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sensor protective cover, characterized in that: It includes a protective cover body (11) and a mounting bracket provided on the protective cover body (11); The mounting bracket is used to mount the protective cover body (11) on the commutator housing (201); The protective cover body (11) can be sleeved on the spherical shell (101) of the mobile universal joint (1) and enclose the gear ring (5) on the spherical shell (101); The protective cover body (11) is provided with a mounting part (1103) for mounting a rotational speed sensor (6).

2. The sensor protective cover according to claim 1, characterized in that: The protective cover body (11) includes a first cover body (1101) and a second cover body (1102), and the first cover body (1101) and the second cover body (1102) are detachably connected; The mounting bracket includes a first bracket (1201) provided on the first cover body (1101) and a second bracket (1202) provided on the second cover body (1102), and the first bracket (1201) and the second bracket (1202) are respectively detachably connected to the commutator housing (201).

3. The sensor protective cover according to claim 2, characterized in that: The first bracket (1201) is in an "L" shape and includes a first mounting plate (12011) and a second mounting plate (12012) connecting the first mounting plate (12011) and the first cover body (1101); The first mounting plate (12011) is connected to the commutator housing (201) through a first connecting piece (14), and a reinforcing rib (16) is connected between the first mounting plate (12011) and the first cover body (1101); A relief hole (1601) is provided on the reinforcing rib (16), and the relief hole (1601) can make way for the tool for installing the first connecting piece (14).

4. The sensor protective cover according to claim 2, characterized in that: The second cover body (1102) is provided with a protruding part (11023) protruding outwards, and the second bracket (1202) is connected to the protruding part (11023); The second bracket (1202) is in a "V" shape, and both ends of the second bracket (1202) are connected to the commutator housing (201) through a second connecting piece (15); The mounting part (1103) includes a sensor mounting hole at the connecting part of the second bracket (1202) and the protruding part (11023).

5. The sensor protective cover according to claim 2, characterized in that: The cross-sections of the first cover body (1101) and the second cover body (1102) are in a "C" shape. The two ends of the first cover body (1101) are respectively provided with first connecting plates (11012), and the two ends of the second cover body (1102) are respectively provided with second connecting plates (11022). The corresponding first connecting plates (11012) and second connecting plates (11022) are connected through a third connecting piece (18).

6. The sensor protective cover according to any one of claims 2 to 5, characterized in that: A limiting structure (11013) is provided between the first cover body (1101) and the second cover body (1102), and the limiting structure (11013) is used to prevent the first cover body (1101) and the second cover body (1102) from moving along the axial direction of the gear ring (5); and / or, The distance between the inner wall of the first cover body (1101) and the spherical shell (101) is 1 mm-3 mm, and the distance between the inner wall of the second cover body (1102) and the spherical shell (101) is 1 mm-3 mm.

7. A universal joint assembly, characterized in that: It comprises a mobile universal joint (1), a commutator (2) connected to the mobile universal joint (1), a rotation speed detection unit arranged between the mobile universal joint (1) and the commutator (2), and a sensor protective cover according to any one of claims 1 to 6; The rotation speed detection unit comprises a ring gear (5) and a rotation speed sensor (6); the ring gear (5) is fixedly mounted on the ball shell (101) of the movable universal joint (1); the rotation speed sensor (6) is mounted on the commutator housing (201) of the commutator (2) corresponding to the ring gear (5); and a gap is provided between the ring gear (5) and the rotation speed sensor (6).

8. The universal joint assembly according to claim 7, characterized in that: A first limiting unit is provided between the gear ring (5) and the spherical shell (101), and the first limiting unit is used to limit the circumferential rotation of the gear ring (5) around the spherical shell (101); and / or, A second limiting unit is provided between the gear ring (5) and the spherical shell (101), and the second limiting unit is used to limit the gear ring (5) from detaching from the spherical shell (101) along the axial direction of the spherical shell (101).

9. The universal joint assembly according to claim 7, characterized in that: The spherical shell (101) is provided with a centering shaft (1011), the commutator housing (201) is provided with a centering hole (2011), and the centering shaft (1011) is inserted into the centering hole (2011); The axial matching length of the centering shaft (1011) and the centering hole (2011) of the centering shaft (1011) is 43 mm to 58 mm; the radial tolerance range of the centering hole (2011) is -0.01 mm to 0.2 mm; and the radial tolerance range of the centering shaft (1011) is -0.07 mm to -0.01 mm.

10. A vehicle, characterized in that: The vehicle is provided with a universal joint assembly as described in any one of claims 7 to 9.

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