WO2017061068A1

WO2017061068A1 - Shaft box with temperature sensor unit for rolling stock bogie, and temperature detection device

Info

Publication number: WO2017061068A1
Application number: PCT/JP2016/003988
Authority: WO
Inventors: 武宏西村; 與志佐藤; 圭市郎加村; 雅幸三津江
Original assignee: 川崎重工業株式会社
Priority date: 2015-10-08
Filing date: 2016-09-01
Publication date: 2017-04-13

Abstract

This shaft box with temperature sensor unit for a rolling stock bogie is provided with a shaft box housing a bearing that supports the shaft, a temperature sensor unit which is attached to the shaft box and which detects the temperature of the outer race of the bearing, and an elastic body which biases the temperature sensor unit in the direction in which the temperature sensor unit presses against the outer race, wherein the elastic body is configured so as to be capable of elastically deforming so as to follow displacement of the temperature sensor unit about the rotation axis of the bearing.

Description

Axle box device with temperature sensor unit and temperature detection device for bogie for railway vehicle

The present invention relates to an axle box device with a temperature sensor unit and a temperature detection device for a railway vehicle carriage.

2. Description of the Related Art A railcar bogie is known in which a temperature sensor is provided in a shaft box that houses a bearing that supports an axle, and the temperature of the outer ring of the bearing is detected by the temperature sensor to detect an abnormal temperature rise of the bearing. (For example, refer to Patent Document 1).

JP 2006-234102 A

However, in a state where the bearing is accommodated in the axle box, the outer ring of the bearing is only fitted into the axle box, so that the outer ring can be slightly displaced in a direction approaching or separating from the axle box. Therefore, the contact of the temperature sensor with the outer ring of the bearing becomes unstable due to the influence of the vibration of the carriage and the like, and there is a possibility that accurate temperature detection cannot be performed. Further, since the axle is press-fitted into the inner ring of the bearing, no relative displacement in the rotational direction occurs between the inner ring and the axle, but the outer ring can be displaced around the axis of rotation with respect to the axle box. If it does so, the front-end | tip of a temperature sensor may be dragged by the outer ring | wheel by the displacement around the rotating shaft line of an outer ring | wheel, and it may lead to damage of a temperature sensor.

Therefore, an object of the present invention is to accurately detect the temperature of the outer ring of the bearing housed in the axle box of the railcar bogie and to prevent damage to the temperature sensor.

An axle box device with a temperature sensor unit for a railway vehicle carriage according to an aspect of the present invention is provided with an axle box in which a bearing supporting an axle is accommodated, and attached to the axle box, and detects a temperature of an outer ring of the bearing. A temperature sensor unit; and an elastic body that urges the temperature sensor unit in a direction in which the temperature sensor unit presses the outer ring. The elastic body is a displacement of the temperature sensor unit around a rotation axis of the bearing. It is configured to be elastically deformable following the above.

A temperature detection apparatus for a railway vehicle carriage according to an aspect of the present invention includes a temperature sensor unit that detects a temperature of an outer ring of the bearing through an opening of a shaft box that houses a bearing that supports an axle, and the temperature sensor unit includes: An elastic body that urges the temperature sensor unit in a direction to press the outer ring, and the elastic body is configured to be elastically deformable following the displacement of the temperature sensor unit around the rotation axis of the bearing. The

According to each of the above configurations, since the temperature sensor unit is urged by the elastic body in the direction of pressing the outer ring of the bearing, the temperature sensor unit stably and accurately adjusts the temperature of the outer ring even if vibration of the carriage occurs. It can be detected. Moreover, since the elastic body can be elastically deformed following the displacement of the temperature sensor unit around the rotation axis of the bearing, the temperature sensor unit can be received from the outer ring by being biased toward the outer ring. The force around the rotation axis can be elastically absorbed by the displacement of the temperature sensor unit itself. Therefore, the stress transmitted to the temperature sensor is suppressed, and damage to the temperature sensor can be prevented.

According to the present invention, it is possible to accurately detect the temperature of the outer ring of the bearing housed in the axle box of the railway vehicle carriage, and to prevent damage to the temperature sensor.

It is a side view of the bogie of the railway vehicle which concerns on 1st Embodiment. It is the side view which made the cross section partially the axle box apparatus with a temperature sensor unit of the trolley | bogie shown in FIG. It is a side view of the temperature sensor unit shown in FIG. It is the side view which made the principal part of the trolley | bogie which concerns on 2nd Embodiment partly cross-sectioned. It is the side view which made the principal part of the trolley | bogie which concerns on 3rd Embodiment partial cross section. It is the side view which made the principal part of the trolley | bogie which concerns on 4th Embodiment partly cross-sectioned. It is the side view which made the principal part of the trolley | bogie which concerns on 5th Embodiment partly cross-sectioned. It is the side view which made the principal part of the trolley | bogie which concerns on 6th Embodiment partial cross-section. It is the side view which made the principal part of the trolley | bogie which concerns on 7th Embodiment partly cross-sectioned. It is the side view which made the principal part of the trolley | bogie which concerns on 8th Embodiment partly cut.

Hereinafter, embodiments will be described with reference to the drawings. In the following description, the direction in which the railway vehicle travels and the direction in which the vehicle body extends is defined as the vehicle longitudinal direction, and the lateral direction perpendicular thereto is defined as the vehicle width direction. The longitudinal direction of the vehicle may also be referred to as the front-rear direction, and the vehicle width direction may be referred to as the left-right direction.

(First embodiment)
FIG. 1 is a side view of a bogie 1 for a railway vehicle according to an embodiment. As shown in FIG. 1, a bogie 1 for a railway vehicle includes a bogie frame 3 that supports a vehicle body 50 via an air spring 2. The carriage frame 3 has a pair of side beams 4 extending in the vehicle longitudinal direction on both sides in the vehicle width direction, and a lateral beam (not shown) extending in the vehicle width direction by connecting the pair of side beams 4 to each other. Presents an H shape in plan view. On both sides of the carriage frame 3 in the vehicle longitudinal direction, axles 6 extending along the vehicle width direction are arranged. Wheels 7 are respectively fixed to both sides of the axle 6 in the vehicle width direction. Bearings 8 that rotatably support the axle 6 on the outer side in the vehicle width direction than the wheels 7 are provided at both ends of the axle 6 in the vehicle width direction. The bearing 8 includes an inner ring (not shown), an outer ring 8a (see FIG. 2), and rolling elements (not shown) sandwiched between the inner ring and the outer ring 8a. The bearing 8 is accommodated in the axle box 11 of the axle box device 10.

The axle box 11 has an axle box main body portion 12, an axial beam portion 13 (connecting portion), and a spring receiving portion 14. The axle box body 12 houses the bearing 8. The shaft beam portion 13 is connected to the carriage frame 3. The shaft beam portion 13 integrally extends from the axle box main body portion 12 toward the vehicle longitudinal direction center of the carriage 1 in the vehicle longitudinal direction, and the distal end portion thereof is elastically connected to the side beam 4 via the rubber bush 15. Is done. The spring receiver 14 is provided on the upper portion of the axle box main body 12. A coil spring 16 that extends and contracts in the vertical direction is interposed between an end 4 a of the side beam 4 in the longitudinal direction of the vehicle and the spring receiving portion 14 of the axle box 11. A temperature sensor unit 20 is attached to the lower part of the axle box 11.

FIG. 2 is a partial cross-sectional side view of the axle box device 10 with the temperature sensor unit 20 of the carriage 1 shown in FIG. FIG. 3 is a side view of the temperature sensor unit 20 shown in FIG. As shown in FIGS. 2 and 3, the axle box device 10 includes an axle box 11, a temperature sensor unit 20, and a pair of elastic devices 21. The temperature sensor unit 20 and the elastic device 21 constitute a temperature detection device. The temperature sensor unit 20 has a wireless communication function. The axle box 11 includes an upper axle box element 17 (first axle box element) that covers an upper area (first area) of the outer peripheral surface of the outer ring 8a of the bearing 8, and a lower area (first area) of the outer peripheral surface of the outer ring 8a of the bearing 8. And a lower axle box element 18 (second axle box element) covering the second area). That is, the axle box 11 includes an upper axle box element 17 that supports a load from the carriage frame 3, and a lower axle box element 18 that is positioned below the upper axle box element 17 and that can be attached to and detached from the upper axle box element 17. It is divided into two.

The upper shaft box element 17 is provided with a part of the shaft box main body 12, a shaft beam portion 13, and a spring receiving portion 14. The lower shaft box element 18 is provided with the other portion of the shaft box main body 12. The surface where the upper shaft box element 17 covers the outer peripheral surface of the outer ring 8 a of the bearing 8 is larger than the surface where the lower shaft box element 18 covers the outer peripheral surface of the outer ring 8 a of the bearing 8. The lower end of the upper shaft box element 17 is located below the rotation axis X of the bearing 8. The lower shaft box element 18 has a smaller vertical dimension than the upper shaft box element 17. The lower axle box element 18 is detachably attached to the upper axle box element 17 by bolts B from below.

The temperature sensor unit 20 is attached to the lower shaft box element 18 in order to detect the temperature of the outer ring 8a of the bearing 8. A unit accommodation space S for accommodating the temperature sensor unit 20 is formed between the outer peripheral surface (lower surface) of the outer ring 8 a of the bearing 8 and the lower shaft box element 18. The temperature sensor unit 20 protrudes below the lower shaft box element 18 through the opening 18b formed in the bottom wall portion 18a of the lower shaft box element 18 in a state of being housed in the unit housing space S. That is, the lower end portion of the temperature sensor unit 20 is positioned below the lower shaft box element 18 and exposed to the outside of the shaft box 11.

The temperature sensor unit 20 includes a housing 31, a heat conduction sheet 32, a temperature sensor 33, a sensor substrate 34, a wireless communication board 35, a battery 36, and a heat insulating material 37. The temperature sensor unit 20 has a temperature detection function, a wireless communication function, and a power supply function. The housing 31 is a case that houses a heat conductive sheet 32, a temperature sensor 33, a sensor substrate 34, a wireless communication board 35, a battery 36, and a heat insulating material 37.

The housing 31 includes a contact member 38, a heat conductive sheet 39, a base plate 40, and a cover 41. The contact member 38 and the base plate 40 are made of a metal having thermal conductivity, for example, an aluminum alloy. The heat conductive sheet 39 is made of a material having elasticity and heat conductivity, for example, heat conductive silicone rubber.

The cover 41 is made of non-conductive resin, for example, glass fiber reinforced resin. Specifically, the cover 41 includes an accommodating portion 41a having a concave cross section and a flange portion 41b that protrudes laterally from the accommodating portion 41a. The accommodating portion 41a includes a bottom plate portion 41aa having a dome shape that swells away from the base plate 40, and a cylindrical side plate portion 41ab extending from the outer peripheral edge of the bottom plate portion 41aa toward the flange portion 41b. The side plate portion 41ab is cylindrical. In a state where the temperature sensor unit 20 with the wireless communication function is attached to the axle box 11, at least the bottom plate portion 41aa of the accommodating portion 41a of the cover 41 is exposed to the outside of the axle box 11 through the opening 18b. In the present embodiment, a part of the bottom plate portion 41aa and the side plate portion 41ab is exposed to the outside of the axle box 11 through the opening 18b.

The contact member 38 includes a heat receiving portion 38a formed with an arc-shaped heat receiving surface 38c (upper surface) that is in surface contact with the outer peripheral surface of the outer ring 8a of the bearing 8, and a shaft box mounting portion 38b that protrudes laterally from the heat receiving portion 38a. Have The heat conductive sheet 39 is sandwiched between the contact member 38 and the base plate 40 in a compressed state.

The base plate 40 includes a main body portion 40a, a cover attachment portion 40b provided around the main body portion 40a, and a shaft box attachment portion 40c protruding sideways from the cover attachment portion 40b. The main body 40 a holds the heat conductive sheet 32, the temperature sensor 33, the sensor substrate 34, the wireless communication board 35, the battery 36, and the heat insulating material 37. The contact box 38 and the axle

box attachment portions

38b and 40c of the base plate 40 are attached to the lower axle box element 18 via the elastic device 21. The cover 41 has a concave cross-sectional shape, and is attached to the cover attachment portion 40b of the base plate 40 with screws (not shown). The cover 41 covers the heat conductive sheet 32, the temperature sensor 33, the sensor substrate 34, the wireless communication board 35, the battery 36, and the heat insulating material 37 from below.

The heat conductive sheet 32 has insulating properties and is sandwiched between the base plate 40 and the temperature sensor 33 in a compressed state. That is, the detection unit of the temperature sensor 33 is pressed against the heat conductive sheet 32. The heat conductive sheet 32 is made of a material having insulating properties, elasticity, and heat conductivity, for example, heat conductive silicone rubber. The heat of the outer ring 8 a of the bearing 8 is transmitted in the order of the contact member 38, the heat conduction sheet 39, the base plate 40, the heat conduction sheet 32, and the temperature sensor 33.

The temperature sensor 33 is mounted on the upper surface of the sensor substrate 34. The sensor board 34 has a sensor circuit that outputs the temperature information of the outer ring 8a detected by the temperature sensor 33 to the conversion board 42 described later as an analog temperature signal. The wireless communication board 35 includes a conversion board 42 and a wireless communication module 43 (wireless transmission unit). The conversion board 42 has a conversion circuit that converts an analog temperature signal from the temperature sensor 33 into a digital temperature signal. The conversion board 42 and the sensor board 34 are connected via a connector 47 extending in the vertical direction. The wireless communication module 43 is mounted on the conversion board 42 and wirelessly transmits a digital temperature signal from the conversion board 42 as a wireless signal to the outside of the temperature sensor unit 20 (for example, a radio receiver of a railway vehicle).

The battery 36 stores power to be supplied to the temperature sensor 33, the sensor substrate 34, and the wireless communication board 35. On the upper surface of the wireless communication board 35, a first electrode 44 that is either a positive electrode or a negative electrode and a second electrode 45 that is either the positive electrode or the negative electrode are provided. The first electrode 44 contacts the electrode on one side of the battery 36, and the second electrode 45 contacts the electrode on the other side of the battery 36. The second electrode 45 has a vertical plate portion 45 a protruding from the wireless communication board 35 and a horizontal plate portion 45 b protruding from the vertical plate portion 45 a along the other surface of the battery 36. The battery 36 is sandwiched between the horizontal plate portion 45 b of the second electrode 45 and the first electrode 44.

The electric power from the battery 36 is supplied to the wireless communication board 35 via the first electrode 44 and the second electrode 45, and is supplied to the sensor substrate 34 and the temperature sensor 33 from the wireless communication board 35. The heat insulating material 37 is interposed between the sensor substrate 34 and the battery 36 and has a larger area than the battery 36. In the temperature sensor unit 20, the contact member 38, the heat conductive sheet 39, the base plate 40, the heat conductive sheet 32, the temperature sensor 33, the sensor substrate 34, the heat insulating material 37, the battery 36, and the wireless communication board 35 are arranged in this order. It is arranged side by side below.

The temperature sensor unit 20 is attached to the lower shaft box element 18 via a pair of elastic devices 21. The pair of elastic devices 21 are housed in the unit housing space S and are located on both sides of the cover 41. One of the pair of elastic devices 21 is disposed on one side in the circumferential direction of the outer ring 8a with respect to the heat receiving surface 38c, and the other of the pair of elastic devices 21 is on the other side in the circumferential direction of the outer ring 8a with respect to the heat receiving surface 38c. Placed in. The elastic device 21 includes an elastic body 21a, a metal upper fixture 21b provided on the upper surface of the elastic body 21a, and a metal lower fixture 21c provided on the lower surface of the elastic body 21a. The upper fixture 21b and the lower fixture 21c can be displaced relative to each other in the vertical direction and the horizontal direction by elastic deformation of the elastic body 21a.

The upper fixture 21b is fixed to the contact member 38 and the axle

box attachment portions

38b, 40c of the base plate 40. Specifically, the upper fixture 21b has an upper stud bolt 21d protruding upward, and the contact box 38 and the shaft

box attachment portions

38b and 40c of the base plate 40 are fixed to the upper stud bolt 21d with nuts. The lower fixture 21 c is fixed to the bottom wall portion 18 a of the lower shaft box element 18. Specifically, the lower fixture 21c has a lower stud bolt 21e protruding downward, and the lower shaft box element 18 is fixed to the lower stud bolt 21e with a nut. The elastic device 21 is installed in a state where the elastic body 21a is compressed in the vertical direction, and the temperature sensor unit 20 is attached so that the temperature sensor unit 20 can press the outer ring 8a toward the rotation axis X (center) of the bearing 8. Rush.

The temperature sensor unit 20 can be displaced with respect to the axle box 11 within a predetermined range around the rotation axis X of the bearing 8 by elastic deformation of the elastic body 21a. That is, when the temperature sensor unit 20 is displaced along the outer ring 8a, the elastic body 21a is elastically deformed so as to follow the displacement. The axle box 11 has a stopper portion 46 that restricts the displacement of the temperature sensor unit 20 around the rotation axis X to a predetermined range. The stopper portion 46 is provided integrally with the lower shaft box element 18. The stopper portions 46 are arranged on both sides of the temperature sensor unit 20 with a gap from the temperature sensor unit 20 when viewed from the direction of the rotation axis X. When the temperature sensor unit 20 is dragged by the outer ring 8a and displaced around the rotation axis X, the housing 31 (specifically, the contact member 38 or the base plate 40) of the temperature sensor unit 20 interferes with the stopper portion 46. Thus, the displacement of the temperature sensor unit 20 is restricted to a predetermined range.

According to the configuration described above, the temperature sensor unit 20 is urged by the elastic body 21a in the direction in which the outer ring 8a of the bearing 8 is pressed. The temperature of 8a can be detected stably and accurately. Moreover, since the elastic body 21a interposed between the axle box 11 and the temperature sensor unit 20 can be elastically deformed following the displacement of the temperature sensor unit 20 around the rotation axis X, the temperature sensor unit 20 can be The force around the rotation axis X that the temperature sensor unit 20 can receive from the outer ring 8a by being biased toward 8a can be elastically absorbed by the displacement of the temperature sensor unit 20 itself. Therefore, the stress transmitted to the temperature sensor 33 is suppressed, and damage to the temperature sensor 33 can be prevented.

Further, since the upper shaft box element 17 including the shaft beam portion 13 and the spring receiving portion 14 remains existing, it is sufficient that only the lower shaft box element 18 has a structure to which the temperature sensor unit 20 can be attached. The axle box device 10 with the sensor 33 can be realized. Further, since the arc-shaped heat receiving surface 38c of the temperature sensor unit 20 is in surface contact with the outer peripheral surface of the outer ring 8a, heat transfer from the outer ring 8a to the temperature sensor unit 20 is stabilized and detection accuracy is improved. It is also possible to suppress the temperature sensor unit 20 from being dragged and displaced by the outer ring 8a due to the displacement around the rotation axis X.

Even if the temperature sensor unit 20 is dragged due to the displacement of the outer ring 8a around the rotation axis X, the outer ring 8a can be slid with respect to the temperature sensor unit 20 by the temperature sensor unit 20 interfering with the stopper portion 46. Damage to the temperature sensor 33 can be prevented. Even if the temperature sensor unit 20 is dragged and displaced by the outer ring 8a, the temperature sensor unit 20 tilts around the rotation axis X along the outer ring 8a of the bearing 8, so that the heat receiving surface 38c faces the outer ring 8a. The contact state can be maintained.

For example, in FIG. 2, when the temperature sensor unit 20 is displaced clockwise around the rotation axis X, the elastic body 21a of the left elastic device 21 shears in the horizontal direction and expands and deforms in the vertical direction. The elastic body 21a of the elastic device 21 on the right side undergoes shear deformation in the horizontal direction and compression deformation in the vertical direction. As described above, the pair of elastic devices 21 are deformed differently, whereby the temperature sensor unit 20 can be tilted and the heat receiving surface 38c can be kept in surface contact with the outer ring 8a. Further, since the temperature sensor unit 20 transmits the detected temperature information as a radio signal, there is no need to lay a communication line between the axle box 11 and the temperature sensor unit 20, and the temperature sensor unit 20 is attached to the axle box 11. On the other hand, even when displaced around the rotation axis X, disconnection of the communication line does not occur.

(Second Embodiment)
FIG. 4 is a side view in which the main part of the carriage according to the second embodiment is partially sectioned. In addition, about the structure which is common in 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. As shown in FIG. 4, in the cart of the second embodiment, the axle box device 110 includes an axle box 111, a temperature sensor unit 20, a pair of elastic bodies 121, a fixing bracket 160, and a fastening member 162. . The temperature sensor unit 20, the elastic body 121, the fixing bracket 160, and the fastening member 162 constitute a temperature detection device. The axle box 111 is a cylindrical body that is integrally formed. An opening 111 a that is opened obliquely upward is formed in the upper portion of the axle box 111.

The contact member 38 of the temperature sensor unit 20 detects the temperature of the outer ring 8a by contacting the outer ring 8a of the bearing 8 through the opening 111a from the outside of the axle box 111. The fixture 160 is disposed outside the temperature sensor unit 20. The elastic body 121 is interposed between the temperature sensor unit 20 and the fixing bracket 160 in the radial direction of the bearing 8. Note that a heat insulating material may be interposed between the temperature sensor unit 20 and the elastic body 121. If it does so, it will be prevented that the heat from the temperature sensor unit 20 is transmitted to the elastic body 121, and the thermal deterioration of the elastic body 121 can be prevented.

The fixing bracket 160 includes a substrate portion 160b in which an insertion hole 160a for inserting the temperature sensor unit 20 is formed, and a side plate portion 160c that protrudes from both ends of the substrate portion 160b toward the axle box 111 and covers the temperature sensor unit 20. . The fixing bracket 160 is detachably fixed to the axle box 111 from the outside by a fastening member 162 (for example, a bolt) while covering the temperature sensor unit 20 and the elastic body 121 from the outside. The fastening member 162 passes through the base plate portion 160 b of the fixing bracket 160 and the elastic body 121. The side plate portion 160 c secures a distance between the fixture 160 and the temperature sensor unit 20 by abutting against the axle box 111 in the fastening direction of the fastening member 162.

With the gap G formed between the temperature sensor unit 20 and the axle box 111 in the direction in which the elastic body 121 generates an elastic force, the temperature sensor unit 20 passes from the outside of the axle box 111 through the opening 111a to the bearing 8. In contact with the outer ring 8a. Thus, even if the bearing 8 and the axle box 111 are slightly displaced in the radial direction due to vibration or the like, the temperature sensor unit 20 moves in a direction in which the gap G is narrowed by the elastic force of the elastic body 121, and Contact is maintained. Further, the temperature sensor unit 20 can be displaced with respect to the axle box 111 within a predetermined range around the rotational axis of the bearing 8 by elastic deformation of the elastic body 121. According to such a configuration, the temperature sensor unit 20, the elastic body 121, and the fixture 160 can be attached to and detached from the axle box 111 as a set, and maintenance of the temperature sensor unit 20 and the like can be performed without disassembling the axle box 111. Good workability. Since other configurations are the same as those of the first embodiment described above, description thereof is omitted.

(Third embodiment)
FIG. 5 is a side view in which the main part of the carriage according to the third embodiment is partially sectioned. As shown in FIG. 5, in the axle box apparatus 210 of 3rd Embodiment, the 2nd elastic body 264 is pinched | interposed into the clearance gap G between the temperature sensor unit 20 and the axle box 111, and other than that structure This is the same as in the second embodiment. According to this configuration, the vibration of the temperature sensor unit 20 is suppressed even when the traveling vibration is large, and the reliability of the temperature sensor unit 20 can be improved. In each of the following embodiments, an elastic body may or may not be interposed in the gap between the temperature sensor unit and the axle box.

(Fourth embodiment)
FIG. 6 is a side view in which the main part of the carriage according to the fourth embodiment is partially sectioned. As shown in FIG. 6, in the axle box device 310 of the fourth embodiment, the fixing bracket 360 has only the substrate portion 360b in which the insertion hole 360a for inserting the temperature sensor unit 20 is formed, There is no side plate portion 160c. Instead, a sleeve 364 into which the fastening member 162 is inserted is inserted into the elastic body 121 as a spacer. According to this configuration, the sleeve 364 is sandwiched between the fixing bracket 360 and the axle box 111, so that the distance between the fixing bracket 360 and the temperature sensor unit 20 in the fastening direction of the fastening member 162 is ensured. Other configurations are the same as those of the third embodiment.

(Fifth embodiment)
FIG. 7 is a side view in which a main part of a cart according to the fifth embodiment is partially cross-sectionalized. As shown in FIG. 7, in the axle box device 410 of the fifth embodiment, the axle box 411 includes an upper axle box element 17 that covers an upper region of the outer circumferential surface of the outer ring 8 a of the bearing 8 and an outer circumference of the outer ring 8 a of the bearing 8. A lower axle box element 418 that covers the lower area of the surface and is detachable from the upper axle box element 17. The lower shaft box element 418 has an opening 418a through which the temperature sensor unit 20 is inserted. That is, the temperature sensor unit 20, the elastic body 121, and the fixing bracket 160 are attached to the lower shaft box element 418 by the fastening member 162 from the outside of the lower shaft box element 418. Other configurations are the same as those of the second embodiment.

(Sixth embodiment)
FIG. 8 is a side view in which the main part of the carriage according to the sixth embodiment is partially sectioned. As shown in FIG. 8, in the axle box device 510 of the sixth embodiment, the fixing bracket 560 includes a substrate portion 560b in which an insertion hole 560a for inserting the temperature sensor unit 20 is formed, and an axle box from both ends of the substrate portion 560b. The side plate portion 560 c that protrudes toward 111 and covers the temperature sensor unit 20, and the flange portion 560 d that protrudes outward from the side plate portion 560 c along the outer surface of the axle box 111. The flange portion 560d is fixed to the axle box 111 by the fastening member 562 in a state where the temperature sensor unit 20 and the elastic body 521 are covered from the outside by the substrate portion 560b and the side plate portion 560c. Since the elastic member 521 interposed between the substrate part 560b and the temperature sensor unit 20 and the elastic member 564 interposed between the axle box 111 and the temperature sensor unit 20 are not inserted through the fastening member, It is smaller than the

elastic bodies

121 and 264 of the second to fifth embodiments. Other configurations are the same as those of the third embodiment.

(Seventh embodiment)
FIG. 9 is a side view in which the main part of the carriage according to the seventh embodiment is partially sectioned. As shown in FIG. 9, in the axle box device 610 of the seventh embodiment, the fixing bracket 660 includes a substrate portion 660b in which an insertion hole 660a for inserting the temperature sensor unit 20 is formed, and an axle box from both ends of the substrate portion 660b. A cylindrical portion 660c that protrudes toward 611 and covers the temperature sensor unit 20, and a female screw portion 660d is formed on the inner peripheral surface of the cylindrical portion 660c. The axle box 611 is formed with an opening 611a through which the temperature sensor unit 20 is inserted, and a male screw portion 611b is formed around the opening 611a. That is, the fixing bracket 660 is attached to the axle box 611 simply by screwing the female screw portion 660d with the male screw portion 611b without using a fastening member.

(Eighth embodiment)
FIG. 10 is a side view in which the main part of the carriage according to the eighth embodiment is partially sectioned. As shown in FIG. 10, in the axle box device 710 of the eighth embodiment, the fixing bracket 760 includes a board portion 760b in which an insertion hole 760a for inserting the temperature sensor unit 20 is formed, and an axle box from both ends of the board portion 760b. A side plate portion 760c that protrudes toward 711 and covers the temperature sensor unit 20, an inner plate portion 760d that protrudes from the side plate portion 760c along the outer surface of the axle box 711 toward the inner diameter side, and an inner plate portion 760d that faces the axle box 711. And a protruding cylindrical portion 760e. A male screw portion 760f is formed on the outer peripheral surface of the cylindrical portion 760e. The axle box 711 is formed with an opening 711a through which the temperature sensor unit 20 is inserted, and a female screw portion 711b is formed on the inner peripheral surface of the opening 711a. That is, the fixing bracket 760 is attached to the axle box 711 simply by screwing the male screw portion 760f into the female screw portion 711b without using a fastening member.

The present invention is not limited to the above-described embodiments, and the configuration can be changed, added, or deleted. For example, the heat conductive sheet 39 between the contact member 38 and the base plate 40 may be eliminated, and the contact member 38 may be formed integrally with the base plate 40. That is, a heat receiving surface that is in surface contact with the outer ring 8a may be provided on the base plate. Further, the battery 36 may be attached to the sensor substrate 34 without being attached to the wireless communication board 35. The heat insulating material 37 may be abolished. The connecting portion for connecting the axle box main body 12 to the carriage frame 3 is not limited to the axial beam type, and other methods may be used. The carriage 1 may have a configuration using a leaf spring instead of the side beam 4 and the coil spring 16. In other words, the spring receiving portions of the pair of front and rear axle boxes may support end portions on both sides in the longitudinal direction of the leaf springs from below, and the center portion in the longitudinal direction of the leaf springs may support the transverse beam from below.

1 Bogie 3 Bogie Frame 6 Axle 8 Bearing

8a Outer Ring

11, 111, 411, 611, 711

Shaft Box

111a, 418a, 611a, 711a Opening 13 Shaft Beam (Connecting Portion)
14 Spring receiving portion 17 Upper shaft box element (first shaft box element)
18,418 Lower axle box element (second axle box element)
20

Temperature sensor unit

21a, 121, 264, 521, 564 Elastic body 38c Heat receiving surface 46

Stopper portion

160, 360, 560, 660 Fixing bracket X Rotating axis

Claims

An axle box that houses a bearing that supports the axle;
A temperature sensor unit attached to the axle box for detecting the temperature of the outer ring of the bearing;
An elastic body that biases the temperature sensor unit in a direction in which the temperature sensor unit presses the outer ring,
The axle box device with a temperature sensor unit of a railway vehicle carriage, wherein the elastic body is configured to be elastically deformable following a displacement of the temperature sensor unit around a rotation axis of the bearing.
The axle box has a first axle box element that covers a first region of the outer peripheral surface of the outer ring, and a second axle box element that covers a second region of the outer peripheral surface of the outer ring,
The first axle box element includes a connecting portion connected to a bogie frame, and a spring receiving portion that supports a spring interposed between the bogie frame,
The second axle box element is detachably attached to the first axle box element,
The axle box device with a temperature sensor unit of a railway vehicle carriage according to claim 1, wherein the temperature sensor unit is attached to the second axle box element.
The axle box is divided into an upper axle box element that supports a load from the carriage frame, and a lower axle box element that is located below the upper axle box element and is detachable from the upper axle box element. ,
The axle box device with a temperature sensor unit of a railway vehicle carriage according to claim 1, wherein the temperature sensor unit is attached to the lower axle box element.
4. The axle box device with a temperature sensor unit for a railway vehicle carriage according to claim 1, wherein the temperature sensor unit has an arc-shaped heat receiving surface that comes into surface contact with an outer peripheral surface of the outer ring.
The shaft with a temperature sensor unit of a railway vehicle carriage according to any one of claims 1 to 4, wherein the axle box has a stopper portion that restricts a displacement of the temperature sensor unit around the rotation axis within a predetermined range. Box equipment.
The temperature sensor unit includes a temperature sensor unit for a railway vehicle carriage according to any one of claims 1 to 5, wherein the temperature sensor unit includes therein a wireless transmission unit that transmits detected temperature information of the outer ring by a wireless signal. Shaft box device.
It further comprises a fixing bracket that is detachably fixed to the axle box from the outside,
An opening is formed in the axle box,
The temperature sensor unit is attached to the fixing bracket via the elastic body,
In a state in which a gap is formed between the temperature sensor unit and the axle box in a direction in which the elastic body generates an elastic force, the temperature sensor unit passes through the opening from the outside of the axle box. The axle box device with a temperature sensor unit for a railway vehicle bogie according to any one of claims 1 to 6, which is in contact with an outer ring.
A temperature sensor unit for detecting the temperature of the outer ring of the bearing through the opening of the axle box in which the bearing supporting the axle is accommodated;
An elastic body that biases the temperature sensor unit in a direction in which the temperature sensor unit presses the outer ring,
The temperature detection device for a railway vehicle carriage, wherein the elastic body is configured to be elastically deformable following a displacement of the temperature sensor unit around a rotation axis of the bearing.
It further comprises a fixing bracket that is detachably fixed to the axle box from the outside,
An opening is formed in the axle box,
The temperature sensor unit is attached to the fixing bracket via the elastic body,
In a state in which a gap is formed between the temperature sensor unit and the axle box in a direction in which the elastic body generates an elastic force, the temperature sensor unit passes through the opening from the outside of the axle box. A temperature detection device for a railway vehicle truck that contacts an outer ring.