WO2007052504A1

WO2007052504A1 - Drive shaft damage diagnosing unit

Info

Publication number: WO2007052504A1
Application number: PCT/JP2006/321214
Authority: WO
Inventors: Toyoki Sugiyama; Takashi Oono
Original assignee: Jtekt Corporation
Priority date: 2005-11-04
Filing date: 2006-10-25
Publication date: 2007-05-10
Also published as: CN101103261B; JP4941306B2; CN101103261A; JPWO2007052504A1; KR20080064935A

Abstract

A drive shaft damage diagnosing unit capable of solving such a problem that the output of a sensor is difficult to be taken out when drive shaft of a rolling equipment or the like is diagnosed for its damage. The drive shaft damage diagnosing unit (11) comprises a bottomed cylindrical case (13) inserted into a case insertion hole (12) formed in a bearing cup (9), a sensor (14b) which is fitted to the outer surface of the case (13) and detects the state of the cross (7) of a cross shaft joint (4), and wireless communication device (15) and a battery (17) disposed in the case (13). The wireless communication device (15) is stored in a bottomed cylindrical communication equipment support member (16), and the battery (17) and the communication equipment support member (16) are detachably fitted into the case (13) in this order.

Description

Specification

Drive shaft damage diagnosis unit

Technical field

[0001] The present invention relates to a configuration of a drive shaft damage diagnosis unit for diagnosing drive shaft damage in a rolling facility or the like.

Background art

[0002] In a steel rolling facility, a large load is applied to the drive shaft. Therefore, the drive shaft is easily damaged, and it is important to detect damage early to prevent failure. For this reason, the power of periodic overhaul inspections. Since this inspection takes time and effort, in-service inspections are desired instead of overhauls, and there is a high need to monitor drive shaft damage. It is a thing. Since the drive shaft of a rolling mill rotates itself, wireless monitoring is essential to monitor this.

[0003] On the other hand, in Patent Document 1, in a cross shaft joint provided on a drive shaft of an automobile, a sensor installation hole is provided in the center of the cross, and a temperature sensor and a transmission unit are provided in the hole. A sensor device is provided, and a device is proposed.

Patent Document 1: Japanese Patent Laid-Open No. 2001-304975

Disclosure of the invention

Problems to be solved by the invention

[0004] In order to diagnose the damage to the drive shaft of the rolling equipment, it is conceivable to apply the configuration for the drive shaft of the automobile of Patent Document 1 described above for the drive shaft of the rolling equipment. The two drive shafts are in close contact with each other, there is no gap outside the cross joint, and the antenna for taking out the sensor output cannot be attached to the outside! .

An object of the present invention is to provide a drive shaft damage diagnosis unit that solves the problem that it is difficult to take out the output of a sensor when diagnosing damage to a drive shaft of a rolling facility or the like.

Means for solving the problem A drive shaft damage diagnosis unit according to the present invention is a drive shaft damage diagnosis unit provided in a bearing cup coupled to a cross of a cross joint and is inserted into a case insertion hole provided in a bearing cup. A case, a sensor provided in the vicinity of the bottom of the case to detect the cross state of the cross shaft joint, and a wireless communication device and a battery disposed in the case. The antenna and the wireless communication device are detachably fitted to the case in this order.

[0007] The cross shaft joint also has a cross (cross shaft) disposed between the flange jokes provided at the ends of the two rotating shafts and four cross bearing forces. The cross bearing is composed of a bearing cup and a plurality of rollers, and the bearing cup and the flange joke are connected by bolts, so that the two rotating shafts can be relatively swung and the rotation is reliably transmitted. To be combined. The relative swinging of the cross and the bearing cup serves as a buffer function to alleviate the impact when one rotating shaft force transmits rotational motion to the other rotating shaft.

[0008] The cross joint is made of, for example, bearing steel, and the case and the communication device support member are made of appropriate metal (usually made of steel).

[0009] The drive shaft damage diagnosis unit is provided in each shaft portion (tra-on) of the cross of the cross joint, and one drive shaft damage diagnosis unit includes a wireless communication device that also has an antenna and a wireless board force. It consists of a sensor unit that also has a sensor and sensor substrate force, and a battery that serves as a power source for these. The sensor board contains a preamplifier and a power supply circuit.

[0010] The case has a bottomed cylindrical shape, and in this case, the cylindrical portion and the bottom wall may be integrated or separate. Then, for example, a sensor is attached to the outer periphery of the bottom wall of the case, a sensor substrate is installed on the upper surface of the bottom wall of the case, and a passage for connecting lines that leads to the sensor force sensor substrate is provided in the bottom wall of the case. Then, after the sensor substrate is first installed on the bottom wall of the case, the battery is disposed thereon.

[0011] The opening of the metal case is preferably closed with a resin seal member in order to protect the antenna without adversely affecting transmission and reception. In this case, open the case opening. The opening of the case that may be directly closed by the resin seal member may be closed by the support member of the wireless communication device, and the opening of the support member may be closed by the resin seal member.

[0012] For example, the wireless communication device is housed in a bottomed cylindrical communication device support member, and the opening of the communication device support member may be closed by a resin seal member (first Embodiment). In this case, for example, the communication device support member is formed with a threaded portion on the outer periphery, and is formed on the inner periphery of the case, and thus is fixed to the case by being screwed onto the screw portion. At this time, there may be a gap between the bottom wall of the communication device support member and the battery.

1S From the viewpoint of preventing battery detachment, it is preferable that the bottom wall of the communication device support member is in contact with the battery. If a female screw is provided on the inner periphery of the case opening and a male screw is provided on the outer periphery of the communication device support member, impact force acting on the case during rolling (approx. 100 tons) On the other hand, since the case and the communication device support member are fixed by screwing, there is no problem in strength.

[0013] In addition, the wireless communication device is supported by a communication device support member including a battery holding portion and a plurality of spacers interposed between the battery holding portion and the wireless substrate, and the opening of the case has a grease. It may be closed by a sealing member (second embodiment). In this way, changes in antenna characteristics can be suppressed, and battery detachment due to impact during rolling can be prevented. In this case, the case has a cylindrical portion having a flange and a separate bottom wall force, and the bottom wall has a lower force applied to the bottom surface of the battery holding portion of the communication device support member by the plurality of case assembly bolts inserted. It is preferable that the case flange is detachably attached to the bearing cup with a plurality of case attachment bolts. This makes it easy to replace the wireless substrate, battery, and displacement sensor.

[0014] Since the conventional bearing cup is provided with a hole for supplying grease, this hole is used as a case insertion hole when the drive shaft damage diagnosis unit is installed on the conventional drive shaft. The grease supply hole is provided at another position.

[0015] The drive shaft monitoring system including the drive shaft damage diagnosis unit transmits / receives to / from the drive shaft damage diagnosis unit (slave unit) provided on each shaft portion of the cross of the cross joint. It consists of a master unit that obtains sensor output and gives necessary instructions to the slave unit, and a monitoring personal computer that processes the sensor output to determine the extent of damage.

[0016] The sensor is for detecting damage (peeling) of the cross joint, and is, for example, a displacement sensor (sensor force is also detected by a change in the distance to the cross surface). The sensor is not limited to a vibration sensor that detects damage by vibration using a piezoelectric accelerometer, and the AE sensor that detects damaged AE (acoustic emission) that also generates damage to the damaged part. Temperature sensors that detect damage, non-contact strain sensors that detect damage by increasing the amount of strain associated with the force acting on the bearing cup from the cross through the rollers (damage is detected by strain), and other sensors are used as appropriate. The

[0017] The top of the antenna may be inserted into a resin seal member. In this case, the top surface of the antenna may be flush with the top surface of the seal member. The surface may protrude outward from the top surface of the seal member, the top surface of the antenna is inward of the top surface of the seal member, and the grease portion of the seal member is thin on the top surface of the antenna I have been doing it. If there is a concern about changes in characteristics due to iron powder (scale) generated during rolling on the antenna, a resin seal member is present at the top of the antenna and the antenna of the wireless communication device is connected to the outside. If there is no such concern as to enable communication without being exposed to light, the top surface of the antenna may be protruded from the resin seal member to improve the radio wave condition during transmission and reception. In any case, the opening of the case (or the communication device support member) is closed by a resin seal member so as not to interfere with transmission and reception by the antenna. For wireless communication, it is important to ensure that there are no obstructions at the top of the antenna. By doing this, the configuration for closing the case opening does not adversely affect radio wave emission. For example, it can be transmitted reliably even when sending signals to the main unit 10m away.

[0018] Preferably, the top of the antenna is formed in a loop shape so as to protrude outward from the top surface of the case, and the resin seal member is formed so as to cover the top of the antenna. In this case, the total length of the antenna is preferably 1/4 of the wavelength λ, and it is preferable that an annular groove for accommodating the top of the antenna is formed in the resin seal member. In this way, the antenna performance can be further improved and stable even during high-speed rotation. Because it can transmit and receive data and power can be reduced, the battery life can be extended.

[0019] When the drive shaft damage diagnosis unit of the first embodiment is provided in the bearing cup, the case of the drive shaft damage diagnosis unit and the case insertion hole cover displacement of the bearing cup are also formed in steps. In addition, the case opening end protrudes from the case insertion hole, and a screw part is provided on the outer periphery of the protrusion, and the nut is screwed onto the male screw part. A diagnostic unit may be detachable. In addition, when the drive shaft damage diagnosis unit of the second embodiment is provided on the bearing force cup, the case of the drive shaft damage diagnosis unit is located outside (in the radial direction) outside the case insertion hole of the bearing cup. In some cases, the drive shaft damage diagnostic unit is detachably built in by being inserted into the bearing cup and screwed into the bearing cup by a plurality of case assembly bolts. By using this bearing cup instead of a bearing cup that does not have a built-in drive shaft damage diagnosis unit, it is possible to easily perform drive shaft damage diagnosis in existing rolling equipment.

The invention's effect

[0020] According to the drive shaft damage diagnosis unit of the present invention, the output of the sensor can be taken out by the wireless communication device arranged in the case, and the battery and the wireless communication device are installed in the case in this order. The battery is not obscured by the wireless communication device because it is detachable. In addition, wireless boards, batteries, and sensors can be replaced without disassembling, and defective or malfunctioning parts can be easily replaced during regular inspections.

Brief Description of Drawings

FIG. 1 is a perspective view showing a drive shaft of a rolling facility in which the drive shaft damage diagnosis unit according to the present invention is preferably used.

FIG. 2 is a block diagram showing a drive shaft monitoring system using the drive shaft damage diagnosis unit according to the present invention.

[FIG. 3] FIG. 3 shows a drive shaft damage diagnosis unit according to the present invention and a bearin incorporating the same. FIG. 3 is a cross-sectional view showing a first embodiment of a gcup.

FIG. 4 is a longitudinal sectional view of the drive shaft damage diagnosis unit of the first embodiment.

FIG. 5 is a longitudinal sectional view showing a second embodiment of the drive shaft damage diagnostic unit according to the present invention.

FIG. 6 is a perspective view of the same.

FIG. 7 is an exploded perspective view of the same.

FIG. 8 is a longitudinal sectional view showing a modified example of the drive shaft damage diagnostic unit of the first embodiment.

Explanation of symbols

(1) Drive shaft

(4) Cross shaft coupling

(7) Cross

(9) Bearing cup

(11) Drive shaft damage diagnosis unit

(12) Case insertion hole

(13) Case

(13c) Female thread

(13d) Male thread

(14b) Sensor (displacement sensor)

(15) Wireless communication device

(15a) Wireless board

(15b) Antenna

(16) Communication device support member

(16a) Bottom wall

(16d) Male thread

(17) Battery

(18) Sealing material made of resin

(21) Nut (31) Drive shaft damage diagnostic unit

(33) Case

(42) Cylindrical part

(43) Flange 咅

(44) Bottom wall

(34b) Sensor (displacement sensor)

(35) Wireless communication device

(36) Communication device support member

(37) Battery

(38) Resin seal member

(38c) Annular groove

(45) Case fixing bolt

(47) Wireless board

(48) Antenna

(48b) Top

(49) Battery holder

(50) Spacer

(52) Case thread bonnet

(61) Wireless board

(62) Antenna

(62b) Top

(63) Sealant made of resin

(63c) annular groove

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the upper and lower sides of the drive shaft damage diagnosis unit are the upper and lower sides of FIGS. 4 and 5. When attached to the drive shaft, the upper part corresponds to the radially outer side, and the lower part corresponds to the radially inner side.

FIG. 1 shows a drive shaft of a rolling facility in which the drive shaft damage diagnosis unit according to the present invention is used (1) Some of them are shown. The drive shaft (1) connects a rolling roller (not shown) and a drive motor, and transmits the rotation of the drive motor to the rolling roller. The roller rotating shaft (1) having one end coupled to the rolling roller (2) An intermediate rotary shaft (3) whose one end is coupled to the other end of the roller rotary shaft (2) via a cross joint (4), and a cross joint on the other end of the intermediate rotary shaft (3). And a motor rotating shaft having one end coupled to the drive motor and the other end coupled to the drive motor. The configuration of the joint part with the cross shaft joint (4) is the same on the motor rotary shaft side and the roller rotary shaft (2) side, and a pair of rotary shafts (2) and (3) are attached to these joint ends. They are coupled so as to be able to swing relative to each other by intervening cross shaft joints (4).

At the joint end of one rotating shaft (2), a flanjok (5) with a 90 ° angle is provided so as to face 180 ° apart, and the other rotating shaft (3) At the coupling end, a flanking (6) with a 90 ° angle is provided so as to face the position that is 90 ° apart from the rotating shaft (2) in the opposite direction with a 1 80 ° separation. . The cross joint (4) has four shaft portions (torons) (7a), and has a cross (cross shaft) (7), a cross (7), and each yoke (5) (6). It consists of four cross bearings (8) installed at the joint site. As shown in FIG. 2, each cross bearing (8) also has a bearing cup (9) and a plurality of rollers (10) supported by the bearing cup (9). Each flange (5) (6) is provided with a female thread (5a) (6a), and each bearing cup (9) is provided with a bolt insertion hole (9a). At the butt end of the shaft (2), a pair of flange jokes (5) and a pair of bearing cups (9) corresponding to these are joined with bolts, and the other rotating shaft (3) At the butt end, a pair of flange jokes (6) and a corresponding pair of bearing cups (9) are connected with bolts so that the rotating shafts (2) and (3) rotate together. Combined to communicate. The cross (7) and the bearing cup (9) can swing relative to each other through contact with the rollers (10). From one rotating shaft (2) to the other rotating shaft (3) It functions as a buffer to alleviate the impact of transmitting rotational motion to the body. Thus, by allowing the rolling roller to move, the impact on the drive shaft (1) is mitigated. However, since the cross joint (4) is subjected to a large load due to an impact or the like, the damage will proceed with long-term use. In order to monitor the progress of this damage, each bearing cup (9) has a built-in drive shaft damage diagnosis unit (11) that detects damage to the cross (7). [0026] As shown in FIG. 3, the bearing cup (9) is provided with a cross shaft portion storage space (9b) for storing the shaft portion (7a) of the cross (7) from the inner peripheral side. The roller (10) is arranged in the same space (9b) so as to roll in contact with the outer periphery of the shaft (7a) of the cross (7). The bearing cup (9) is further provided with a case insertion hole (12) communicating with the cross shaft housing space (9b) from its outer peripheral side. The case insertion hole (12) is opened to supply grease for lubricating the rolling contact portion between the cross (7) and the bearing cup (9), but (10), and the hole is diverted. It is a thing.

[0027] The drive shaft damage diagnosis unit (11) is supported by the bottomed cylindrical case (13) inserted into the case insertion hole (12) provided in the bearing cup (9) and the case (13). A sensor unit (14) that detects the state of the cross (7) of the cross joint (4), a wireless communicator (15) for taking out the output from the sensor unit (14), and a wireless communicator ( 15), a bottomed cylindrical communication device support member (16), a battery (17) for supplying power to the sensor unit (14) and the wireless communication device (15), and a communication device support member (16). And a resin sealing member (18) for closing the opening.

[0028] The case insertion hole (12) includes an opening (12a), a small diameter portion (12b) having a smaller diameter than the opening (12a), and a large diameter portion (12c) having a larger diameter than the small diameter portion (12b). As a result, a first annular step (12d) is formed at the boundary between the opening (12a) and the small diameter (12b), and the boundary between the small diameter (12b) and the large diameter (12c). A second annular step (12e) is formed at the boundary portion.

FIG. 2 shows a hardware configuration of a drive shaft monitoring system using the drive shaft damage diagnosis unit (11) according to the present invention. As shown in the figure, each drive shaft damage diagnosis unit (11) is used as a slave unit of this drive shaft monitoring system, and each slave unit (11) has an output of 14 sensors. Is transmitted to the main unit (19) via the wireless communication device (15). A monitoring computer (20) is connected to the main unit (19). The monitoring PC (20) is installed in a monitoring room away from the rolling equipment, and processes the data sent from each drive shaft damage diagnosis unit (11) to check the degree of damage to the cross (7). Discriminate and display the result on the monitor PC (20) display.

[0030] When the drive shaft (1) rotates, the cross (7) and the bearing cup (9) exert a force through the rollers (10), and the cross (7) and the bearing cup generated by this force are applied. The relative displacement with (9) is the sensor Detected by the unit (14) and transmitted to the parent unit (19) by the wireless communication device (15). Since the wireless communicator (15) is built in the bearing cup (9), the two drive shafts (1) are in close contact with the rolling shaft drive shaft, and the cross shaft joint (4) Even if there is no gap, the output from the sensor unit (14) can be taken out easily. Cross (7) If the surface is damaged, the output of the sensor unit (14) force will be different from the normal value.By determining whether this difference is within the allowable range, the drive shaft ( 1) Damage diagnosis can be performed. Since each shaft (7a) of the cross (7) usually has a different degree of damage progression, damage diagnosis is performed for each shaft (7a). In this way, it is possible to diagnose damage while the drive shaft (1) is in operation, and it is possible to eliminate the disassembly inspection after the operation is stopped.

Next, with reference to FIG. 4, the details of each component of the drive shaft damage diagnostic unit (11) will be described.

[0032] The case (13) includes a small diameter portion (13a) having substantially the same outer diameter as the small diameter portion (12b) of the case insertion hole (12) and a large diameter portion (12c) of the case insertion hole (12). A large-diameter portion (13b) having substantially the same outer diameter and a bottom wall (13c) closing the opening of the large-diameter portion (13b). When the case (13) is inserted into the case insertion hole (12) (see Fig. 3), the outer peripheral edge of the large diameter portion (13b) is the second annular step (12e) of the hole (12). The small-diameter portion (13a) is located in the opening (12a) of the same hole (12) by projecting the small-diameter portion (12b) force of the same hole (12), and the large-diameter portion (13b) is the same. The large diameter portion (12c) force of the hole (12) also protrudes and is located in the cross shaft portion accommodating space (9b). At the end of the small diameter portion (13a) of the case (13), a female screw portion (13c) is provided on the inner periphery, and a screw portion (13d) is provided on the outer periphery.

[0033] The case (13) is fitted with a nut (21) screwed into the threaded portion (13d) of the small-diameter portion (13a) by inserting a radially inward force into the case insertion hole (12). It is fixed to the bearing cup (9) by coming into contact with the first annular step (12d) of 12). An annular recess (21a) for placing an O-ring is formed on the outer end face of the nut (21), and an O-ring (22) is placed in the recess (21a). In addition, a flange portion (13e) that forms an O-ring storage annular space between the small diameter portion (13a) and the large diameter portion of the case (13) is provided between the case (13) and the large diameter portion (13b). In the same space, an O-ring (23) that is in close contact with the case insertion hole (12) is arranged.

[0034] The sensor unit (14) has a preamplifier and a power circuit, and includes a sensor board (14a) disposed on the top surface of the case (13) bottom wall (13c) and the outer periphery of the shaft (7a) of the cross (7). To face the case (13) It consists of a displacement sensor (14b) provided on the outer periphery of the large diameter portion (13b), and a connection line (14c) connecting the sensor substrate (14a) and the displacement sensor (14b).

[0035] The wireless communication device (15) includes a wireless substrate (15a) placed on the bottom wall (16a) of the communication device support member (16) and an antenna (15b) erected on the wireless substrate (15a). It consists of.

[0036] The communicator support member (16) has the force of the bottom wall (16a), the peripheral wall (16b) and the flange portion (16c) provided on the top of the peripheral wall (16b).

[0037] The battery (17) is held in a horizontally placed state by a substantially U-shaped battery holder (17a) and placed on the sensor substrate (14a).

[0038] On the outer periphery of the peripheral wall (16b) of the communication device support member (16), a male screw portion (16d) that is screwed to the screw portion (13c) is provided on the inner periphery of the opening of the case (13). . When the communication device support member (16) is screwed into the case (13), the flange portion (16c) of the communication device support member (16) is placed in the recess (21a) of the nut (21). It is designed to be in close contact with (22). In addition, the battery (17) having a gap between the bottom surface of the bottom wall (16a) of the communication device support member (16) and the upper surface of the battery (17) in the horizontal state is provided with the communication device support member (16 ) Is restrained by the bottom wall (16a). The communication device support member (16) is screwed onto the case (13), so that the communication device support member (16) is prevented from coming off even when a large impact is applied. The components that need to be in contact with each other are reliably brought into contact with each other.

[0039] The resin seal member (18) closing the opening of the communication device support member (16) is integrally bonded to the top of the peripheral wall (16b) by a resin mold. In this resin molding, the top of the antenna (15b) is supported by the peripheral wall (16b) of the communication device support member (16) while the wireless communication device (15) is supported in the communication device support member (16). The resin is filled and molded between the top of the antenna (15b) and the peripheral wall (16b) of the communication device support member (16). This prevents the resin seal member (18) from popping out due to an impact. And since transmission / reception with the main unit (19) via the antenna (15b) is not located at the top of the antenna (15b), an obstacle (for example, a battery) that is an obstacle to the antenna (15b) is not Stable communication is possible.

[0040] In addition, the replacement of the battery (16) and the repair of the wireless communication device (15) can be easily performed by removing the communication device support member (16). Times) You can do this and it will be very secure.

[0041] The drive shaft damage diagnosis unit (11) matches the shape of the case (13) with the case insertion hole (12) of the bearing cup (9) with respect to the drive shaft that does not have the damage diagnosis unit. Can be attached detachably. This makes it easy to diagnose damage to existing drive shafts. The drive shaft damage diagnostic unit (11) can be replaced with the bearing cup (9) by installing it in the bearing cup (9). Diagnosis can be made easily.

FIGS. 5 to 7 show a second embodiment of the drive shaft damage diagnostic unit according to the present invention.

[0043] The drive shaft damage diagnosis unit (31) has a case insertion hole (12) provided in the bearing cup (9).

(See Fig. 3) A bottomed cylindrical case (33) that is inserted into the case, and a sensor unit (34) that is supported by the case (33) and detects the state of the cross (7) of the cross joint (4) A wireless communication device (35) for taking out the output from the sensor unit (34) to the outside, a communication device support member (36) for supporting the wireless communication device (35), the sensor unit (34) and the wireless communication device. A battery (37) for supplying power to the machine (35) and a resin seal member (38) for closing the opening of the case (33) are provided.

[0044] As shown in Fig. 5, the case guide hole (12) has a first guide ring (40) located below (inward in the radial direction) below the thrust washer (39) and more than the thrust washer (39). The second guide ring (41) on the upper side (radially outward) is fitted. The second guide ring (41) is provided with a plurality of female thread portions (41a) and one grease-pull (41b).

[0045] The case (33) includes a cylindrical portion (42) having a flange portion (43) and having an outer diameter substantially the same as the inner diameter of the second guide ring (41), and is separate from the cylindrical portion (42). And a bottom wall (44) fitted to the lower end thereof. The lower surface of the flange portion (43) is brought into contact with the upper surface of the second guide ring (41). The cylindrical part (42) and the bottom wall (44) of the case (33) have the same outer diameter, and the case (33) must be inserted into the first and second guide rings (40X41) with upward force. Can do. The flange portion (43) is provided with a plurality of through holes (43a) through which a case mounting bolt (45) for coupling the case (33) to the second guide ring (41) is passed. . The case (33) is connected to the bearing cup (9) by the case mounting bolt (45) passing through the flange (43) and screwing it onto the female thread (4 la) of the second guide ring (41). ). On the outer periphery of the case (33) An O-ring (46) that is in close contact with the inner periphery of the second guide ring (41) is disposed.

The flange portion (43) of the case (33) is provided slightly below the upper end of the cylindrical portion (42), and the bearing cup (9) force is removed from the upper end portion of the cylindrical portion (42). A handle (42a) is formed on the body for easy removal.

[0047] The sensor unit (34) includes a sensor substrate (34a) having a preamplifier and a power circuit, and a bottom wall (44) of the case (33) so as to face the outer periphery of the shaft (7a) of the cross (7). And a connection wire (34c) connecting the sensor substrate (34a) and the displacement sensor (34b). The bottom wall (44) functions as a mounting member for the displacement sensor (34b).

[0048] The wireless communication device (35) includes a wireless board (47) and an antenna (48) installed upright on the wireless board (47). The antenna (48) includes a rising portion (48a) in which the force of the wireless substrate (47) extends upward, and a top portion (48b) formed in a loop connected to the rising portion (48a) and parallel to the wireless substrate (47). Have. The antenna (48) is formed of copper wire, and the total length of the rising part (48a) and the top part (48b) is 1Z4 with a wavelength. The top (48b) protrudes above the upper surface of the case (33).

[0049] The communication device support member (36) includes a perforated disc portion (49a) that is also brought into contact with the battery (37) by an upward force, and extends downward from the outer peripheral edge of the perforated disc portion (49a). ) On both sides of the battery (37) and both ends of the battery (37) are notched (49c) and the flange (49d) is provided at the lower end of the cylinder (49b). The battery holder (49), and a plurality of spacers (50) interposed between the perforated disc (49a) of the battery holder (49) and the wireless board (47). Become. The communication device support member (36) has a spacer (50) fitted over a male screw (51) that also penetrates the wireless substrate (47) with an upward force, and this male screw (51) is attached to the battery holder (49). Since it is provided in the perforated disk part (49a), it is assembled by being screwed into the screw. Here, by setting the height of the spacer (50) to a predetermined value, the position of the top (48a) of the antenna (48) is set to the predetermined position with respect to the position of the wireless board (47). Can do.

The resin seal member (38) also has a cylindrical portion (38a) and a top wall (38b) force. An annular inward protrusion (42b) is formed on the inner periphery of the upper end of the cylindrical portion (42) of the case (33), and the cylindrical portion (38a) of the resin seal member (38) is formed. The outer periphery is formed in a stepped shape so as to prevent the inner protrusion (42b) from being pulled out upward. This makes it possible to make The lug member (38) is prevented from jumping out.

[0051] The resin seal member (38) projects the antenna (48) above the upper surface of the case (33), so that the upper surface is positioned further above the top (48b) of the antenna (48). It is formed to do. An annular groove (38c) in which the top portion (48b) of the antenna (48) is received is formed on the lower surface of the top wall (38b) of the resin seal member (38). The protruding amount of the resin seal member (38) from the upper surface of the case (33) is set so as not to interfere with the upper and lower drive shafts (1) (approximately several mm).

[0052] The bottom wall (44) of the case (33) is provided with a bolt through hole (44a) with a downward force step, and the communication device is supported on the upper surface of the bottom wall (44) of the case (33). The flange part (49d) of the battery holding part (49) of the member (36) is overlapped. On the upper surface of the flange (49d) of the battery holder (49) of the communication device support member (36), the inward flange (42c) force provided at the lower end of the cylindrical portion (42) of the case (33) S is further superimposed. Then, in order to correspond to the bolt insertion hole (44a) of the bottom wall (44) of the case (33), the female thread force on the inward flange (42b) of the case (33) Through-holes are formed in the flange part (49d) of the battery holder (49) of the battery case (49), and the case (33) is inserted by the case assembly bolt (52) screwed from below the bottom wall (44) of the case (33). ), The communication device support member (36), and the bottom wall (44) of the case (33) are integrated.

[0053] Thus, the drive shaft damage unit (31) is supported by the case (33) provided with the resin seal member (38), the wireless board (47) with the antenna (48), and the battery (37). The communication device supporting member (36) and the case bottom wall (44) to which the displacement sensor (34b) is attached are composed of three partial forces. ) The case inserted from below the bottom assembly bolt (52) is simply removed, so when the wireless board (47) or battery (37) needs to be replaced, it can be easily replaced. The maintainability is becoming very good. Then, since transmission / reception with the main unit (19) via the antenna (48) is not an obstacle (for example, a battery) that is an obstacle to the antenna (48), it is not located on the top of the antenna (48). Stable communication is possible, and the area of the antenna (48) protruding from the upper surface of the case (33) is greatly increased compared to the first embodiment. As a result, sufficient communication quality is ensured.

[0054] The drive shaft damage diagnosis unit (31) is provided for a drive shaft that does not have a damage diagnosis unit. Then, by inserting the case (33) into the case insertion hole (12), the case (33) can be detachably attached, and thus damage diagnosis of the existing drive shaft can be easily performed.

[0055] The configuration of the antenna (48) and the resin seal member (38) of the second embodiment is the same as that of the wireless communication device (15) of the first embodiment shown in FIG. It can be applied to one embodiment.

In FIG. 8, the wireless communication device (15) is erected on the wireless substrate (61) placed on the bottom wall (16a) of the communication device support member (16) and the wireless substrate (61). Antenna (62). The opening of the communication device support member (16) is closed by a resin seal member (63). The communication device support member (16) includes a bottom wall (16a), a peripheral wall (16b), and a flange portion (16c) provided on the top of the peripheral wall (16b), and the communication device support member (16) has a peripheral wall (16b). ) On the outer periphery, a male screw portion (16d) is provided on the inner periphery of the opening of the case (13), and thus screwed with the screw portion (13c).

[0057] The antenna (62) includes a rising portion (62a) extending upward from the wireless substrate (61) and a top portion formed in a loop shape connected to the rising portion (62a) and parallel to the wireless substrate (61) ( 62b). The antenna (62) is made of copper wire, and the total length of the rising part (62a) and the top part (62b) is 1Z4 with a wavelength. The top portion (62b) protrudes upward from the upper surface of the communication device support member (16).

The resin seal member (63) also has a cylindrical portion (63a) and a top wall (63b) force. An annular inward protrusion (16e) is formed on the inner periphery of the upper end of the peripheral wall (16b) of the communication device support member (16), and the outer periphery of the cylindrical portion (63a) of the resin seal member (63) Is formed in a stepped shape so as to prevent upward intrusion by the inward protruding portion (16e). The resin seal member (63) causes the antenna (62) to protrude above the upper surface of the communication device support member (16), so that the upper surface is further above the top (62b) of the antenna (62). Formed to be located in! An annular groove (63c) for receiving the top portion (62b) of the antenna (62) is formed on the lower surface of the top wall (63b) of the resin seal member (63). The upper surface force of the communication device support member (16) of the resin seal member (63) is so large that it does not interfere with the upper and lower drive shafts (1) (approximately several millimeters). . Industrial applicability

[0059] The present invention provides a drive shaft damage diagnosis unit for diagnosing drive shaft damage in rolling equipment or the like. Conventionally, in order to diagnose the damage of the drive shaft, periodic overhaul inspection has been carried out However, by using the drive shaft damage diagnosis unit of the present invention, it is possible to save labor and time required for overhauling.

Claims

The scope of the claims

[1] A drive shaft damage diagnosis unit provided in the bearing cup connected to the cross of the cross joint, which is inserted into the case insertion hole provided in the bearing cup and near the bottom of the case. It is provided with a sensor for detecting the cross state of the cross joint and a wireless communication device and a battery arranged in the case. The wireless communication device includes a wireless board and an antenna installed on the wireless substrate. The drive shaft damage diagnostic unit is characterized in that the battery and the wireless communication device are detachably fitted to the case in this order.

[2] The drive shaft damage diagnosis according to claim 1, wherein the wireless communication device is housed in a bottomed cylindrical communication device support member, and the opening of the communication device support member is closed by a resin seal member. unit.

[3] The drive shaft damage diagnosis unit according to claim 2, wherein a female screw portion is provided on the inner periphery of the case opening, and a male screw portion is provided on the outer periphery of the communication device support member.

[4] The wireless communicator is supported by the battery retainer and a plurality of spacer communication members that are interposed between the battery retainer and the wireless board, and the case opening is made of resin. The drive shaft damage diagnosis unit according to claim 1, wherein the drive shaft damage diagnosis unit is closed by a seal member.

[5] The case is a cylindrical part having a flange and a bottom wall force separate from the cylindrical part. The bottom wall is applied to the lower surface of the battery holding part of the communication device support member by a plurality of case assembly bolts inserted thereunder. 5. The drive shaft damage diagnosis unit according to claim 4, wherein the drive shaft damage diagnosis unit is detachably attached and a plurality of bolt insertion holes are formed in a flange portion of the case.

[6] The top of the antenna is formed in a loop shape so as to protrude outward from the top surface of the case, and the resin seal member is formed so as to cover the top of the antenna. Or 4 drive shaft damage diagnostic unit.

7. The drive shaft damage diagnosis unit according to claim 6, wherein an annular groove for accommodating the top of the antenna is formed in the resin seal member.

[8] A bearing cup provided with the drive shaft damage diagnosis unit according to claim 3, wherein both the case of the drive shaft damage diagnosis unit and the case insertion hole of the bearing cup are stepped. The case opening end protrudes from the case insertion hole, and a screw is provided on the outer periphery of the protrusion, and a nut is screwed onto the male screw. A bearing cup with a built-in removable drive shaft damage diagnosis unit.

6. A bearing cup provided with the drive shaft damage diagnosis unit according to claim 5, wherein the case of the drive shaft damage diagnosis unit is inserted into the case insertion hole of the bearing cup, and the flange portion of the case is supported by a plurality of case mounting bolts. The bearing cup has a built-in drive shaft damage diagnosis unit that is detachably mounted by being screwed onto.