TWI573720B - Wheel speed sensing device - Google Patents

Description

Wheel speed sensing device

The present invention relates to an inductive device, and more particularly to a wheel speed sensing device.

Referring to FIG. 1 , a conventional wheel speed sensing device 1 is mounted between a rim 21 and a rear arm 22 and includes an inductive magnetic ring 11 fixed to the rim 21 and a shield. The housing 12 outside the induction magnetic ring 11 and a magnetic sensing member 13 mounted on the housing 12 and facing the induction magnetic ring 11. Referring to FIG. 2, the housing 12 includes a body portion 121 in the shape of a bowl, and a blocking protrusion 122 protruding from the body portion 121.

Referring to Figure 3 and in conjunction with Figure 1, Figure 3 shows the rear arm 22, which is positioned for alignment of the housing 12 to determine that the magnetic sensing member 13 is positioned in the correct position. The rear arm 22 includes a cylindrical body 221 and a positioning recess 222 recessed at an outer side end of the main body 221 for engaging the blocking protrusion 122.

As shown in FIG. 1 , when the housing 12 is assembled with the rear arm 22 , the blocking protrusion 122 of the housing 12 is positioned and locked to the positioning groove 222 of the rear arm 22 to confirm that the housing is fixed to the housing. The magnetic sensing member 13 of the body 12 is mounted in the correct direction. However, since the blocking convex portion 122 is convex outward, in addition to increasing the overall configuration width, it is inevitable that the vehicle will travel when traveling. Due to the bumpy road surface, the casing 12 and the rear arm 22 are subjected to vibration or even impact. At this time, not only the stopper convex portion 122 may be broken, but also the positioning groove 222 of the rear arm 22 may be damaged by impact. Moreover, when the arm 22 is assembled after the housing 12 is manufactured, the processing of forming the positioning groove 222 on the rear arm 22 must be performed, which increases the processing time and cost.

Accordingly, it is an object of the present invention to provide a wheel speed sensing device that can reduce the overall configuration width without requiring additional processing of the arms after mating.

Therefore, the wheel speed sensing device of the present invention is mounted on a locomotive, the locomotive includes a rear arm with at least one screw, an axle pivoted to the rear arm, and a set of rims disposed on the axle. And a rear arm bearing disposed on the rear arm. The wheel speed sensing device comprises: a rotating unit fixed to the rim and rotatable with the rim, a casing unit surrounding the rotating unit, and a solid body mounted to the casing unit and facing the rotating unit Measurement unit.

Wherein, the outer casing unit comprises a casing surrounding the rotating unit, and the fixed measuring unit is mounted on the inner side of the casing and faces the rotating unit for magnetic induction. The housing has a substrate that is disposed by the axle, and a surrounding plate that surrounds a periphery of the rotating unit. The substrate has at least one recess that can fit and receive a screw that is locked to the rear arm. When the screw is locked to the rear arm, the rear arm bearing can be blocked and fixed, and the position of the recessed portion of the substrate is corresponding to the position where the screw is locked.

The utility model has the advantages that: the recessed portion of the substrate can accommodate the screw locked to the rear arm to shorten the overall configuration width, and does not need Additional processing is performed on the rear arm. When assembling, it is also possible to confirm the correctness of the assembly direction of the outer casing unit by the recessed portion and the screw which are matched with the position, and to avoid the function of affecting the induced wheel speed due to the misassembly.

122‧‧‧stop convex

3‧‧‧ wheel speed sensing device

31‧‧‧Rotary unit

311‧‧‧ kit

312‧‧‧ Mounting

313‧‧‧ magnetic ring

314‧‧‧ oil seal

32‧‧‧Shell unit

321‧‧‧Shell

322‧‧·wheel speed bearings

323‧‧‧Substrate

324‧‧‧round board

325‧‧‧Connecting Department

326‧‧‧Depression

327‧‧‧Outline Department

33‧‧‧Solid measuring unit

331‧‧‧Magnetic parts

332‧‧‧Signal line

4‧‧‧Motorcycle

41‧‧‧ rear arm

411‧‧‧Locking Department

412‧‧‧ reinforcing ribs

42‧‧‧Axle

43‧‧‧ rims

44‧‧‧Bear arm bearings

5‧‧‧ screws

Other features and advantages of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a cross-sectional view illustrating a conventional wheel speed sensing device; FIG. 2 is a perspective view illustrating the wheel speed FIG. 3 is a perspective view showing a rear arm that fits the housing; FIG. 4 is an exploded perspective view showing an embodiment of the wheel speed sensing device of the present invention; FIG. 5 is a perspective view illustrating A housing unit and a solid measurement unit of the embodiment; FIG. 6 is a side view showing a rear arm that fits the housing unit; and FIG. 7 is a cross-sectional view showing the assembly of the housing unit with the rear arm.

Referring to FIG. 4 and FIG. 5, an embodiment of the wheel speed sensing device 3 of the present invention is mounted on a locomotive 4, the locomotive 4 including a rear arm 41 having a plurality of screws 5 locked thereto, and a pivoting arm 41 thereon. The axle 42 is a set of rims 43 disposed on the axle 42 and a rear arm bearing 44 disposed on the rear arm 41. The rear arm 41 includes a locking portion 411 which is annular and is locked by a plurality of screws 5, and a plurality of reinforcing ribs 412 extending outward from the locking portion 411, respectively. The screws 5 are locked to the lock portion 411 corresponding to the positions of the reinforcing ribs 412, respectively. The embodiment includes: a rotating unit 31 fixed to the rim 43 and rotatable with the rim 43 , a housing unit 32 surrounding the rotating unit 31 , and a housing unit 32 mounted to the housing unit 32 The solid measurement unit 33 of the moving unit 31.

Referring to FIG. 5 and FIG. 6 , the housing unit 32 includes a housing 321 surrounding the rotating unit 31 , and a wheel speed bearing 322 disposed on the base plate 323 and sleeved on the axle 42 . The housing 321 has a substrate 323 which is bored by the wheel shaft 42 and a surrounding plate 324 which is bent from the outer periphery of the substrate 323 and surrounds the outer periphery of the rotating unit 31. The substrate 323 has a connecting portion 325 disposed on the outer peripheral edge, and a plurality of engaging screws 5 are disposed at positions of the screws 5 of the rear arm 41, and can respectively receive the recessed portions 326 of the screws 5. It should be particularly noted that since the housing 321 of the outer casing unit 32 is integrally formed and made of a non-metal material, the mold can be quickly utilized and mass-produced by, for example, injection molding, and can be simultaneously and simultaneously. Forming the recessed portions 326 can effectively reduce manufacturing costs and shorten manufacturing time. When the injection molding process of the housing 321 is performed, since the engaging portion 325 can be chamfered or arcuate (only FIG. 5 shows a chamfered state), it is easier to demold from the mold, and thus can Improve manufacturing yield. However, if the factor of mold release from the mold is not considered, the joint portion 325 can be designed to be stepped regardless of the aesthetic factors, and is not limited to the type described above.

The self-test unit 33 includes a magnetic sensing member 331 mounted on the substrate 323 of the housing 321 and a signal line 332 connected to the magnetic sensing member 331 for transmitting an inductive signal. Wherein, the surrounding plate 324 of the housing 321 An outlet portion 327 through which the signal line 332 is inserted is formed. It should be particularly noted that, when assembling, the outlet portion 327 must be assembled in the correct direction so that the signal line 332 is indeed connected to a central control system (not shown).

As shown in Fig. 6, the angle between the two adjacent screws 5 located above is different from the angle between the other adjacent screws 5. With the above design, when the housing unit 32 is assembled, the position of the recessed portion 326 can be determined corresponding to the position of the screw 5, and the assembly direction of the housing unit 32 can be determined to ensure the output of the housing 321 . The wire portion 327 can be fastened to the correct position to prevent the signal line 332 from being reliably connected due to the mis-grouping, thereby affecting the function of the wheel speed sensing. It should be noted that the recessed portion 326 and the screw 5 locked to the locking portion 411 are designed as long as the screw 5 is disposed at a position corresponding to the recessed portion 326 of the substrate 323, and can Thereby, the direction in which the outer casing unit 32 is assembled can be determined. For example, it is also possible to provide only one recessed portion 326, and the locking portion 411 only locks a corresponding screw 5, and cooperates with the protruding portion 327 to determine the assembly direction, not as shown in FIG. The number and number of models are limited.

Referring to FIG. 7 , the rotating unit 31 includes a set 311 disposed on the axle 42 , a mounting seat 312 disposed on the sleeve 311 , a magnetic ring 313 mounted on the mounting base 312 , and a setting An oil seal 314 between the mount 312 and the surrounding plate 324. When the axle 42 rotates, the sleeve 311, the mounting seat 312, and the magnetic ring 313 rotate with each other, and the magnetic sensing member 331 shown in FIG. 5 can sense the rotation of the magnetic ring 313 by the magnetic induction principle. The number of turns and the sensed number of turns information via the signal line 332 Passed to the central control system and displayed by the dashboard (not shown).

As shown in FIG. 7, the screws 5 (only one shown in FIG. 7 due to the cross-sectional angle relationship) can fix the rear arm bearing 44 to the rear arm 41, avoiding the rear arm bearing 44 from the rear arm. 41 falls off and affects the travel of the locomotive 4. Wherein, in the form of the screw 5 shown in FIG. 6, the screws 5 are fixed to the rear arm bearing 44 by a circular or hexagonal outer end edge of the nut. The shape of each of the screws 5 is only required to be fixed to the rear arm bearing 44 by the outer edge of the nut, and is not limited to the state shown in FIG. It is to be particularly noted that since the present invention directly fixes the rear arm bearing 44 by means of the screws 5, it is not necessary to perform additional processing on the rear arm 41. Furthermore, since the substrate 323 of the housing 321 is recessed with a plurality of recesses 326 for accommodating the screws 5, when the housing unit 32 is assembled with the rear arm 41, the recesses 326 are respectively accommodated. By arranging the screws 5, the overall arrangement width can be effectively shortened compared to the design of the stopper projections 122 as shown in FIG.

In summary, the substrate 323 of the housing 321 is formed with at least one recessed portion 326, which can fit and receive the screw 5 locked to the rear arm 41, thereby enabling the additional processing of the rear arm 41 without additional processing. The effect of shortening the overall arrangement width is achieved, and the directionality of the assembly of the outer casing unit 32 can be confirmed by the recessed portion 326 and the screw 5 corresponding to each other, thereby avoiding the occurrence of a mis-group, and thus the object of the present invention can be achieved. .

However, the above is only an embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the application according to the present invention is The simple equivalent changes and modifications made by the scope of the patent and the contents of the patent specification are still within the scope of the invention.

3‧‧‧ wheel speed sensing device

31‧‧‧Rotary unit

32‧‧‧Shell unit

321‧‧‧Shell

322‧‧·wheel speed bearings

4‧‧‧Motorcycle

41‧‧‧ rear arm

411‧‧‧Locking Department

412‧‧‧ reinforcing ribs

42‧‧‧Axle

43‧‧‧ rims

44‧‧‧Bear arm bearings

5‧‧‧ screws

Claims (8)

A wheel speed sensing device is mounted on a locomotive comprising a rear arm with a plurality of screws, an axle pivoted to the rear arm, a set of rims disposed on the axle, and a setting a rear arm bearing of the rear arm, the rear arm includes a locking portion that is annular and locked by the screws, and a plurality of reinforcing ribs extending outward from the locking portion, the screws are respectively The position of the reinforcing rib is locked to the locking portion, and the angle between the two adjacent screws is different from the angle between the other adjacent screws, and the wheel speed sensing device comprises: a rotation a unit fixed to the rim and rotatable with the rim; a housing unit including a housing surrounding the slewing unit, the housing having a substrate disposed by the axle, and a surrounding a surrounding plate around the periphery of the moving unit, the substrate has a plurality of recesses respectively for accommodating the screws of the rear arm, and a fixing unit mounted on the shell of the outer casing unit Body and facing the rotating unit. The wheel speed sensing device of claim 1, wherein the fixing unit comprises a magnetic sensing member mounted on the substrate of the housing, and a signal line connected to the magnetic sensing member for transmitting an inductive signal. The surrounding plate of the casing is formed with an outlet portion for the signal wire to pass through. The wheel speed sensing device of claim 1, wherein the housing of the outer casing unit is integrally formed and made of a non-metallic material. The wheel speed sensing device according to claim 1, wherein the rotation unit The utility model comprises a set on the axle, a mount disposed on the sleeve, a magnetic ring mounted on the mount, and an oil seal disposed between the mount and the surround. The wheel speed sensing device of claim 1, wherein the outer casing unit further comprises a wheel speed bearing disposed on the base plate and sleeved on the axle. The wheel speed sensing device of claim 1, wherein the substrate further has an engaging portion disposed on the outer periphery. The wheel speed sensing device of claim 6, wherein the engaging portion is chamfered or arcuate. The wheel speed sensing device of claim 1, wherein the surrounding plate of the housing is bent from a periphery of the outer periphery of the substrate.