JP2667838B2 - Slip ring device for vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle slip ring, and more particularly to an axle suitable for transmitting a signal to and from a rotating portion provided on an axle having a plurality of tires. The present invention relates to a slip ring device. [Prior Art] As a vehicle having an axle having a plurality of tires, a monorail vehicle or a new city traffic can be cited. The axle of these vehicles is generally provided with a tire internal pressure detecting device from the viewpoint of ensuring safety. This tire internal pressure detection device is configured such that a tire internal pressure is detected by a pressure detector provided in the vicinity of the tire, and the detection result of the detector is a signal line and a rotating portion of an axle and a slip ring arranged corresponding to the rotating portion. And a display or an alarm is output. In addition, Japanese Patent Publication No. 47-14884 is related to this type of apparatus. [Problems to be Solved by the Invention] By the way, in the case of monitoring the tires of the multiple wheels, that is, the tires of the axles on which the plurality of tires are installed, by the tire pressure detection device of one system, the conventional signal line is shared between the tires. Internal pressure was detected. Therefore, it was not possible to determine which tire or both tires were abnormal, and each time an abnormality was detected, the condition of the tire had to be visually checked. In other words, since the measures for the occurrence of a tire abnormality are completely different between the abnormality of only one tire and the abnormality of both tires, sufficient consideration should be given to making it possible to immediately judge the abnormal state and take prompt action. Didn't. An object of the present invention is to provide a slip ring device for an axle in which an electric circuit for transmitting a plurality of status signals can be configured with a simple and small structure. [Means for Solving the Problems] The present invention provides a shaft having a base end portion fixed to an axle, and the shaft so that a distal end portion and a base end portion of the shaft are exposed to cover a radial outer peripheral portion. And a first spacing tube made of an insulating material, and the first spacing tube covering the installation ranges of two bearings installed on the outer peripheral portion of the first spacing tube in the radial direction. A first terminal tube, which is fitted with a tube, is formed of a conductor, and is fitted by exposing a distal end portion and a base end portion of the first terminal tube; The spacing tube is fitted with the distal end portion and the base end portion of the second spacing tube exposed and fitted to the second terminal tube made of a conductor and the leading end portion of the first terminal tube. A first bearing made of a conductor and a second bearing made of a conductor fitted in the second terminal cylinder.
And a case that covers the outer circumferences of the first bearing and the second bearing, which are rotatably supported by the first bearing and the second bearing with respect to the shaft, and A first terminal connected to the first bearing and a second terminal connected to the second bearing; and a case made of an insulating material; and a first terminal tube and a second terminal tube. In an axle slip ring device connected to an electric circuit on an axle side and connected to an electric circuit on a fixed side to the first terminal and the second terminal, the shaft is formed of a conductor; A third bearing made of a conductor is installed at a tip end portion projecting from the first spacing cylinder, and is installed at a tip end side end portion of the case and covers the tip end portion of the shaft and is made of a conductor. And has a lid to which the third bearing is connected By installed the fixed-side terminal to the lid, it is achieved. [Operation] The shaft is formed of a conductor, the third bearing fitted to the shaft is also formed of a conductor, the lid covering the tip of the shaft is also formed of a conductor, and the lid is Since it has a fixed-side terminal while being in contact with the third bearing,
The shaft, the third bearing, the lid, and the fixed-side terminal can form an independent electric circuit. From this, since three electric circuits can be configured in combination with the two electric circuits configured by the first bearing and the second bearing, a plurality of state signals on the axle side can be simply and It can be transmitted in a small configuration. Embodiment An embodiment according to the present invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 is an axle having a base end portion attached to an axle 31 provided with tires 30a and 30b. Reference numeral 2 is a drainer provided on the base end side of the shaft 1, that is, on the attachment end side to the axle 31, and an O-ring is attached to the joint portion.
22 are interposed. Reference numeral 4 denotes a first spacing cylinder that is fitted to the shaft 1 by exposing the base end portion and the tip end portion thereof and covering the outer periphery of the intermediate portion. The first terminal cylinder 3 is fitted to the outer peripheral portion of the first spacing cylinder 4. The first terminal cylinder 3 has a drain 2
The terminal 8b exposed to the end of the terminal 8b is connected to form a signal transmission path. 6 is attached to the outer circumference of the first terminal cylinder 3 via a second spacing cylinder 7, and is provided on the end face on the base end side with the first
This is a second terminal tube installed with an insulating seat 5 interposed between the terminal tube 3 and the terminal tube 3. A terminal 8a exposed to the end face side of the drain 2 is connected to the second terminal cylinder 6 to form a signal path different from that of the first terminal cylinder 3. A second bearing 16 made of a conductor is fitted to the tip of the second terminal tube 6, and the tip of the first terminal tube 3 is separated from the second spacing tube 7 by the tip. A first bearing 19b made of a conductor is fitted to the protruding portion. The case 9 is rotatably supported relative to the shaft 1 via the second bearing 16 and the first bearing 19b. The case 9 is made of an insulating material. Reference numeral 10 denotes a felt ring provided on a portion of the inner surface of the case 9 facing the outer periphery of the first terminal cylinder 6, and serves to prevent dust from entering between the drain 2 and the case 9. Reference numeral 11 denotes a spacer provided in the vicinity of the felt ring 10 of the case 9, an oil seal 12 is provided on an inner peripheral portion thereof, and an O rig 13 b is provided between the spacer 9 and the case 9. A spacer 18a is provided adjacent to the spacer 11, and the spacer 18a is formed of a conductor.
6 and also contacts the terminal 14a exposed to the outer peripheral portion of the case 9;
The terminal 14a includes a spacer 18a, a second bearing 16, and a second terminal tube 6.
And the terminal 8a form one signal transmission electric circuit. An O-ring 1 is provided between the terminal 14a and the case 9.
5b is installed. 17 is a spacer of the second bearing 16
A spacer 18b made of a conductor is provided adjacent to the insulating seat 7 on the side opposite to 18a.
The spacer 18b is in contact with the first bearing 19b and also with the terminal 14b exposed on the outer periphery of the case 9. Therefore, the terminal 14b, the spacer 18b, the first bearing 19
b, the first terminal tube 3 and the terminal 8b form another signal transmission circuit. An O-ring 15a is provided between the terminal 14b and the case 9 to prevent water or other dust from entering. 20 is a spacer 18b of the third bearing 19b
Insulator is provided adjacent to the opposite side, 21 is the first
Is an insulating seat provided in contact with the tip end of the spacing cylinder 4 and adjacent to the first bearing 19b. A spacer 23 made of a conductor is provided so as to be fitted to the shaft 1 so as to be adjacent to the insulating seat 21, and a third bearing 19a is fitted to the outer periphery of the spacer 23. The end surface of the third bearing 19a is in contact with the insulating seat 20. The third bearing 19a also supports the case 9 so as to be relatively rotatable. 24 is a washer for holding the spacer 23 on the shaft 1, so that the nut 25 can be attached to the end face of the shaft 1.
Is formed with a screw. Reference numeral 26 is a lid made of a conductor formed so as to be in contact with the end surface of the third bearing 19a and to be fitted to the end surface of the case 9, and is a terminal for connecting wiring.
27 are provided. Therefore, the terminal 27, the lid 26, the third
Bearing 19a, spacer 23 and shaft 1 form another signal transmission circuit. With such a configuration, the state of the pneumatic switches 32a and 32b for detecting the internal pressure of the tires 30a and 30b and notifying that the pressure is equal to or less than the set pressure can be confirmed by the three signal transmission circuits. Since there is an abnormality in any of 30a and 30b, it can be determined immediately. According to such a configuration, the shaft 1 is formed of a conductor and used as a signal transmission circuit, so that the assembly operation can be performed without using the conventional hollow shaft and performing the complicated work of wiring in the hollow shaft. It can be done simply. In addition, the configuration of the shaft 1 itself is simplified, work is facilitated, and the slip ring itself can be made smaller by reducing the diameter of the shaft 1. By forming the lid 26 with a conductor and installing the terminal 27, there is no need to install a special electric circuit component, and the third signal transmission electric circuit can be formed with a simple structure. Further, a felt ring 10 and an oil seal 12
Is provided, water or dust does not enter the above-described signal transmission circuit, and problems such as short-fall can be prevented. [Effects of the Invention] As described above, according to the present invention, a plurality of state signals can be transmitted with a simple and small configuration.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view showing an embodiment of a slip ring according to the present invention, and FIG. 2 is a circuit diagram showing a configuration of a signal transmission circuit using the slip ring of FIG. . 1 ... Shaft, 2 ... Drainer, 3,6 ... Terminal tube, 4,7 ... Space tube, 5 ... Insulator, 9 ... Case, 10 ... Felt ring, 12 ... Oil seal, 26 ……lid

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Fumio Iwasaki               794 Kudamatsu-shi, Yamaguchi Prefecture               Inside the Kasado Plant of Hitachi, Ltd.                (56) References JP-A-51-25178 (JP, A)                 Shokai Sho 57-187204 (JP, U)                 Tokiko Hei 7-73963 (JP, B2)                 47-14884 (JP, Y1)                 Jiko 51-53038 (JP, Y2)

Claims (1)

(57) [Claims] A shaft having a base end fixed to the axle, and a first shaft made of an insulating material, the front end and the base end of the shaft being exposed and fitted to the shaft so as to cover the outer periphery in the radial direction. And the first spacing cylinder, which is fitted with the first spacing cylinder and covers the installation range of the two bearings installed on the outer peripheral portion of the first spacing cylinder in the radial direction. A second spacing tube made of an insulating material, and exposing a distal end portion and a base end portion of the first terminal tube, and a leading end portion and a base portion of the second spacing tube. A second terminal cylinder made of a conductor, the end portion of which is exposed and fitted, a first bearing made of a conductor, which is fitted at a tip portion of the first terminal cylinder, and the second A second bearing made of a conductor, and a case covering the outer circumferences of the first bearing and the second bearing, wherein the shaft is And a first terminal connected to the first bearing and a second terminal connected to the second bearing, rotatably supported by the first bearing and the second bearing. An electric circuit on the axle side is connected to the case made of an insulating material and the first terminal tube and the second terminal tube, and the fixed side electric circuit is connected to the first terminal and the second terminal. In a slip ring device for an axle connecting a circuit, the shaft is made of a conductor, and a third bearing made of a conductor is installed at a tip portion of the shaft protruding from the first spacing cylinder. A lid disposed at a distal end of the case, covering the distal end of the shaft and being made of a conductor, and provided with a lid connected to the third bearing; A slip ring device for an axle.