CN108508230B

CN108508230B - Acceleration sensor assembly

Info

Publication number: CN108508230B
Application number: CN201710108928.5A
Authority: CN
Inventors: 高桥惠介; 三津江雅幸; 梅津邦祐; 渡边昌宏
Original assignee: Kawasaki Heavy Industries Ltd; Kyowa Electronic Instruments Co Ltd
Current assignee: Kawasaki Rolling Stock Co ltd; Kyowa Electronic Instruments Co Ltd
Priority date: 2017-02-27
Filing date: 2017-02-27
Publication date: 2021-07-23
Anticipated expiration: 2037-02-27
Also published as: CN108508230A

Abstract

An acceleration sensor assembly is provided with: a signal outputter including a substrate generating a detection signal of acceleration, and a sensor housing accommodating the substrate; and a wiring body connected to the wiring connection surface of the substrate at one end portion. The sensor housing includes a cylindrical housing main body having a back surface opening; and a back cover attached to the housing main body and closing the back opening. The back opening is formed so that the substrate can pass through. The substrate is accommodated in the housing body so that the wiring connection surface faces the rear opening. The back cover has a wiring insertion hole through which the wiring body is inserted. According to the present invention, the assembling property of the acceleration sensor assembly can be improved.

Description

Acceleration sensor assembly

Technical Field

The present invention relates to an acceleration sensor assembly including a signal output unit including a sensor case that houses a substrate that generates an acceleration detection signal, and a wiring body connected at one end to a wiring connection surface of the substrate.

Background

The acceleration converter disclosed in JP2005-274163a has a case portion that houses an acceleration conversion element. The cable is connected with the acceleration conversion element in the shell part and extends out of the shell part from the back wall of the shell part. The acceleration conversion element includes a substrate. Generally, the substrate is accommodated in the housing portion in a posture in which a surface connected to the cable faces the back surface wall.

When the acceleration converter is assembled, the switch cover is removed and the front surface of the case is opened. The cable is inserted through the housing portion from the rear wall and the end of the cable extends out of the housing portion from the front opening. Then, the cable and the substrate are joined to each other outside the front surface of the case. Then, the cable is pulled from the outside of the back surface, and the acceleration conversion element connected to the cable is housed in the case. After the position of the acceleration conversion element is adjusted through the front opening, the switch cover is mounted on the shell.

Disclosure of Invention

The problems to be solved by the invention are as follows:

in a state where the cable is inserted into the housing portion, it is troublesome to perform a bonding operation outside the housing portion. Due to the structure of the wiring body, the end of the cable cannot be sufficiently extended to the outside of the shell portion, and it is difficult or impossible to assemble in the above-described order.

The purpose of the present invention is to improve the assemblability of an acceleration sensor assembly.

Means for solving the problems:

an acceleration sensor assembly according to an aspect of the present invention includes: a signal outputter including a substrate generating a detection signal of acceleration, and a sensor case accommodating the substrate; and a wiring body connected to a wiring connection surface of the substrate at one end portion, wherein the sensor case includes a cylindrical case main body having a rear surface opening portion formed so that the substrate can pass therethrough, and a rear surface cover attached to the case main body and closing the rear surface opening portion, the substrate is accommodated in the case main body with the wiring connection surface facing the rear surface opening portion, and the rear surface cover has a wiring insertion hole through which the wiring body is inserted.

According to the above configuration, before the rear cover is attached to the case main body, the wiring body is inserted into the wiring insertion hole, and the wiring body can be connected to the substrate in a state where the wiring body is separated from the case main body. After the connection operation is completed, the wiring body, the back cover, and the substrate are integrated, and the substrate is accommodated in the housing main body through the back opening portion and the back cover is attached to the housing main body, whereby the assembly operation of the signal output device and the wiring body is completed. In this way, since the connection work is performed in a state where the wiring body is separated from the case main body, the assembling property of the acceleration sensor assembly is improved.

The wiring body may include an electric wire connected to the wiring connection surface and a pressure-resistant pipe surrounding the electric wire from outside, the electric wire being inserted through the wiring insertion hole, the pressure-resistant pipe being formed to have a larger diameter than the wiring insertion hole.

According to the above configuration, the strength of the wiring body is improved by the large-diameter pressure-resistant pipe. Even if the extension of the wiring body becomes difficult due to the adoption of the pressure-resistant pipe, the acceleration sensor assembly can be easily assembled as described above.

The wiring body may include a plurality of wires connected to the wiring connection surface, and a surrounding material that collects and surrounds the plurality of wires, wherein the plurality of wires are led out from the surrounding material at the one end portion of the wiring body to form an end lead-out portion exposed from the surrounding material, and the end lead-out portion and the surrounding material are fixed to the back cover by a resin material.

According to the above configuration, even if the wiring body is pulled, the rear cover can cope with the tensile load, and disconnection of the one-end lead-out portion can be suppressed.

The signal output device may be mounted to a bogie of the railway vehicle.

According to the above configuration, the relative displacement between the bogie and the vehicle body during the travel of the railway vehicle can be smoothly followed.

The invention has the following effects:

according to the present invention, the assembling property of the acceleration sensor assembly can be improved.

Drawings

Fig. 1 is a side view of an acceleration sensor assembly according to an embodiment;

fig. 2 is a cross-sectional view of the signal follower and one end of the wiring body;

FIG. 3 is a cross-sectional view of the electrical connector and another end of the wiring body;

fig. 4 is an explanatory view of an assembly sequence of the signal outputter and the wiring body;

fig. 5 is an explanatory view of an assembly sequence of the signal outputter and the wiring body;

fig. 6 is an explanatory view of an assembly sequence of the signal outputter and the wiring body;

fig. 7 is an explanatory view of an assembly sequence of the signal outputter and the wiring body;

fig. 8 is an explanatory view of an assembly sequence of the signal outputter and the wiring body;

fig. 9 is an explanatory view of an assembly sequence of the electrical connector and the wiring body;

fig. 10 is an explanatory view of an assembly sequence of the electrical connector and the wiring body;

fig. 11 is an explanatory view of an assembly sequence of the electrical connector and the wiring body;

fig. 12 is an explanatory view of an assembly sequence of the electrical connector and the wiring body;

fig. 13 is an explanatory view of an assembly sequence of the electrical connector and the wiring body;

fig. 14 is an explanatory view of an assembly sequence of the electrical connector and the wiring body;

fig. 15 is a side view of a railway vehicle on which an acceleration sensor assembly is mounted;

description of the symbols:

1 an acceleration sensor assembly;

2 a signal output device;

3, a wiring body;

4 an electrical connector;

5a sensor housing;

7a connector housing;

10a housing body;

11a back cover;

13 a rear opening part;

15 wiring insertion holes;

16a substrate;

16c a wiring connection surface;

21. 61 a resin material;

32 pressure resistant tubing;

33a, 33b waterproof material;

34a, 34b heat shrink tubing;

35 electrical wires;

36 surrounding the material;

38 an end lead-out part;

39 another end lead-out part;

41-44 sealing material;

50 contact points;

54 to receive the aperture.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. The same or corresponding elements are denoted by the same reference numerals throughout the drawings, and overlapping detailed description is omitted.

Fig. 1 is a side view of an acceleration sensor assembly 1 according to an embodiment. The acceleration sensor assembly 1 includes a signal output device 2, a wiring body 3, and an electrical connector 4.

The signal output device 2 has a sensor housing 5. The signal output device 2 is screwed to the surface of the object to be measured 9 by bolts (bolts) (not shown) inserted through two flanges 6 protruding from the outer surface of the sensor housing 5. The signal output unit 2 generates a detection signal indicating the acceleration of the object to be measured 9, and outputs the generated detection signal.

The wiring body 3 is connected to the signal output device 2 at one end and to the electrical connector 4 at the other end. The electrical connector 4 has a connector housing (connecting housing) 7 into which the other end portion of the wiring body 3 is inserted. The electrical connector 4 is electrically and mechanically connected with an external connector (or repeater). The wiring body 3 transmits the detection signal generated and output by the signal outputter 2. The detection signal is output to the outside of the assembly 1 through the wiring member 3 and the electrical connector 4.

The object to be measured 9 is not particularly limited, and a bogie of a railway vehicle is a preferable example of the object to be measured 9.

Fig. 15 shows the acceleration sensor assembly 1 mounted on the bogie 101 of the railway vehicle 100. In this case, the signal output device 2 is attached to the bogie 101 of the railway vehicle 100 by a bolt (not shown) inserted through the flange 6 (see fig. 1), and the acceleration sensor assembly 1 is mounted on the railway vehicle 100. In the illustrated example, the bolts are inserted downward in a state where the signal output device 2 is placed on the upper surface of the bogie frame 102 of the bogie 101, but the posture of the signal output device 2 and the orientation of the bolts are not particularly limited.

The bogie 101 supports the vehicle body 103 from below. The vehicle body 103 is mounted with a controller 104 that inputs a detection signal generated by the acceleration sensor assembly 1. A cable 105 extends from the controller 104, and a relay 106 electrically and mechanically connected to the electrical connector 4 is attached to a tip end portion of the cable 105. The electrical connector 4 and the relay 106 are disposed on the lower surface of the vehicle body 103. The electric connector 4 and the relay 106 are disposed at a position slightly distant from the bogie 101 in the vehicle length direction or at a position overlapping with the end of the bogie 101 in the vehicle length direction when viewed in the vertical direction. In the illustrated example, the electrical connector 4 and the relay 106 are disposed at a slight distance from the bogie 101 toward the center in the vehicle length direction of the railway vehicle 100. The wiring body 3 extends in the vehicle length direction on the bogie frame 102 from the signal output device 2 toward the center side in the vehicle length direction of the railway vehicle 100. A cable 105 extends from the repeater 106 to the controller 104.

However, the positions of the electrical connector 4 and the repeater 106, and the handling of the wiring body 3 and the cable 105 may be changed adaptively. Although not shown in detail, the electrical connector 4 and the relay 106 may be arranged to overlap the center portion of the bogie 101 when viewed in the vertical direction, and the wiring member 3 may extend from the signal output device 2 toward the center of the bogie 101.

The railway vehicle 100 has two bogies 101 (only one of which is shown in fig. 15) that are distant in the vehicle length direction. The acceleration sensor assembly 1 may be attached to only one of the bogies 101, or may be attached to both of the bogies 101. By sequentially connecting a plurality of railway vehicles 100, one train formation can be formed. In this case, the acceleration sensor assembly 1 may be mounted on each of the railway vehicles 100, or the acceleration sensor assembly 1 may be mounted on only one of the railway vehicles 100.

The acceleration sensor assembly 1 mounted as described above is installed in a place where dirt is likely to be generated, a place where there is a chance to contact foreign matter such as mud or stone, or a place where it is likely to be exposed to wind and rain. Therefore, the wiring body 3 is required to have high waterproof performance or protective performance. In the case of a railway vehicle, since the vehicle body and the bogie are displaced relative to each other in the horizontal direction during curved travel, the wiring member 3 of the acceleration sensor assembly 1 is required to smoothly follow the relative displacement. If the wiring body 3 is formed to be easy to follow, a local tensile load is generated in the wiring body 3, and thus the wiring body 3 may be broken. Therefore, the wiring body 3 is required to have high durability and tensile strength.

(Signal output device)

As shown in fig. 2, the sensor housing 5 of the signal output device 2 includes a housing main body 10, a back cover 11, and a front cover 12. The casing body 10 is formed in a cylindrical shape with both ends open, and has a rear opening 13 and a front opening 14. The flange 6 is integrally formed on the outer peripheral surface of the housing body 10. A plurality of grooves 10a extending in the axial direction are arranged at intervals in the circumferential direction on the outer peripheral surface of the housing main body 10. This increases the surface area of the sensor case 5, and improves the heat dissipation performance of the signal output device 2. The back cover 11 is attached to the housing body 10 and closes the back opening 13. The front cover 12 is attached to the casing body 10 and closes the front opening 14. The back cover 11 includes a wiring insertion hole 15 through which one end of the wiring body 3 is inserted. The rear cover 11 is formed in a disk shape, and the wiring insertion hole 15 is formed through the center of the rear cover 11.

The signal output device 2 includes a substrate 16 that generates a detection signal indicating the acceleration of the object to be measured 9, and the substrate 16 is housed in the sensor case 5 (in the case main body 10). The substrate 16 includes a fixed substrate 16a and a flexible substrate 16 b. Electrodes (not shown) necessary for generating signals are arranged on the facing surfaces of the

substrates

16a and 16 b. The two

substrates

16a and 16b are arranged at a distance in the axial direction of the housing body 10. The fixed substrate 16a is positioned on the side close to the rear opening 13, and the flexible substrate 16b is positioned on the side away from the rear opening 13 (i.e., on the side close to the front opening 14). The fixed board 16a has a wiring connection surface 16c as a reverse surface to the facing surface, and the wiring connection surface 16c faces the rear opening 13. The substrate 16 is formed to have a size that can pass through the back opening 13, and in this example, is formed to have a size that can pass through the front opening 14.

The fixing substrate 16a is provided on a plurality of studs (stud) 17a inserted into the inner surface of the rear cover 11. Spacers (spacers) 17b are provided between the facing surfaces of the

substrates

16a and 16 b. The screw 17c is inserted in order from the opposite surface of the flexible substrate 16b to the flexible substrate 16b, the spacer 17b, and the fixed substrate 16a, and is screwed to the stud 17 a. Thus, both

substrates

16a and 16b are supported by the back cover 11. The studs 17a are arranged at intervals in the circumferential direction on the outer circumferential side in the radial direction of the wiring insertion hole 15.

An internal thread is cut on the inner peripheral surface of the wiring insertion hole 15, and a cable gland (cable gland) 18 is screwed to the wiring insertion hole 15. The cable lug 18 projects from the rear cover 11 to the outside of the rear surface of the sensor case 5, and a wiring passage is formed at the center thereof with both ends open to allow the wiring member 3 to be inserted therethrough. The cable gland 18 has an external thread portion 18a at one end thereof to be screwed into the wiring insertion hole 15. The cable gland 18 has a drill portion 18b at its tip end portion. The cable gland 18 has a radially expanded portion 18c between the male screw portion 18a and the drill portion 18b, and a stepped surface is formed between the expanded portion 18c and the drill portion 18 b.

The cable gland head 18 is composed of a first member 18A having an externally threaded portion 18A, and a second member 18B having a drill portion 18B and a bulging portion 18 c. The second member 18B is screwed to the first member 18A, whereby the two

members

18A, 18B are integrated as the cable gland head 18. The first member 18A is screwed to the rear cover 11, and the second member 18B is positioned outside the rear surface of the sensor case 5.

(Wiring body)

As shown in fig. 2 and 3, the wiring body 3 is a multi-structure body including a multi-core cable 31, a pressure-resistant pipe 32,

waterproof materials

33a, 33b, and heat-

shrinkable pipes

34a, 34 b.

The multi-core cable 31 is composed of a plurality of electric wires 35 and a surrounding material 36 that gathers and surrounds the plurality of electric wires 35. The number of the wires 35 is not particularly limited. Each electric wire 35 is composed of a conductor 35a and a covering material 35b having insulation properties and covering the conductor 35 a. The conductor 35a may be a single wire or a twisted wire. The surrounding material 36 includes an insulating coating forming the outer skin of the multicore cable 31, and may further include a mesh-shaped shield wire.

The pressure tube 32 surrounds the electrical wires 35, more specifically the multicore cable 31, from the outside. The pressure pipe 32 has a tensile strength greater than that of the multicore cable 31 or the electric wires 35 thereof, and the pressure pipe 32 surrounds the multicore cable 31, thereby increasing the tensile strength of the wiring body 3 and protecting the multicore cable 31 from the outside (dust, foreign matter, wind, rain, etc.).

Both end portions of the pressure pipe 32 are fastened to the outer peripheral surface of the surrounding material 36 of the multicore cable 31 by cable glans joints 18 by known pipe clamps (hose) 37a, 37 b. Thereby, the pressure-resistant pipe 32 is fixed to the multicore cable 31. One end of the pressure pipe 32 is positioned outside the sensor housing 5 of the signal output device 2, and the other end of the pressure pipe 32 is positioned outside the connector housing 7 of the electrical connector 4.

As shown in fig. 2, one end of the wiring member 3 is inserted through the wiring duct of the cable gland 18, passes through the wiring insertion hole 15, enters the sensor case 5 (inside the case body 10), and is connected to the wiring connection surface 16c of the substrate 16.

In this regard, at one end of the wiring body 3, one end of the multicore cable 31 is led out from one end of the pressure-resistant pipe 32. The plurality of wires 35 are led out from one end of the surrounding member 36, and thus, one end lead-out portions 38 exposed from the surrounding member 36 are formed. A covering material 35b is provided on the base end portion (end portion on the side closer to the covering material 36) of the one end lead-out portion 38 for holding each of the electric wires 35. At the tip end (end on the side away from the covering material 36) of the one end lead-out portion 38, the covering material 35b is peeled off to expose the conductor 35 a. The plurality of conductors 35a are electrically and mechanically connected to the wiring connection surface 16c of the substrate 16 by a known bonding means.

A multicore cable 31 in the wiring body 3 is inserted through the cable glan head 18 and into the sensor housing 5. The external thread portion 18a of the cable gland 18 has a shorter axial length than the wire insertion hole 15. The tip end of the male screw portion 18a is positioned in the wiring insertion hole 15. One end of the surrounding material 36 extends outwardly of the cable gland 18 on the one hand and is accommodated in the wiring plug-in opening 15 on the other hand. One end of the surrounding material 36 is positioned between the tip end of the male screw portion 18a (one end of the cable glan head 18) and the inner surface of the back cover 11. Conversely, the starting point of the one-end lead-out portion 38 is in the wiring insertion hole 15. The one end lead-out portion 38 enters the housing body 10 from the starting point and is connected to the wiring connection surface 16c facing the rear opening 13.

The surrounding material 36 and the one-end lead-out portion 38 are fixed to the back cover 11 by the resin material 21. The resin material 21 is filled in the wiring insertion hole 15 from the inner surface side of the rear cover 11. Thereby, the surrounding material 36 (particularly, a partial outer peripheral surface extending from the cable gland 18 and a cut portion at one end) and the one end lead-out portion 38 (particularly, the covering material 35b of the electric wire 35 at the starting point portion) are fixed to the inner peripheral surface of the wire insertion hole 15 (particularly, the female screw cut therein) and the one end surface of the cable gland 18. Accordingly, even if the wiring body 3 is strongly pulled, the sensor case 5 and the cable glan head 18 can cope with a tensile load, and a high tensile strength can be given to the wiring body 3.

The inside of the sensor case 5 is filled with a filler 22 such as silicone rubber. Since the filler 22 is an insulating material, a short circuit does not occur between the one-end lead-out portion 38 and the substrate 16. Since the filler 22 is a material having elasticity, the operation of the flexible substrate 16b is not hindered, and the acceleration detection performance of the signal output device 2 is not lowered. By filling the filler 22, even if foreign matter such as water or dust penetrates into the case body 10 through the rear opening 13 or the front opening 14, the foreign matter can be prevented from reaching the substrate 16 or the one-end lead-out portion 38, and high waterproof performance can be provided to the signal output device 2.

The pressure pipe 32 has a larger diameter than the wiring insertion hole 15. One end of the pressure pipe 32 is positioned outside the sensor housing 5, and is opposed to the above-mentioned stepped surface of the cable gland 18. The drilling portion 18b enters an annular space formed between the inner peripheral surface of the pressure-resistant pipe 32 and the outer peripheral surface of the multicore cable 31, and is protected by the pressure-resistant pipe 32. The tube clamp 37a is disposed in an end of the pressure tube 32, particularly the portion covering the drill portion 18 b.

With this structure, the wiring member 3 can be given a large strength. On the other hand, water may infiltrate into the internal structure of the wiring body 3 from one end of the pressure-resistant pipe 32. The relative position of the multicore cable 31 to the pressure-resistant pipe 32 is restricted. Therefore, it is difficult to cause the multicore cable 31 to enter the sensor case 5 and extend from the front opening 14. Therefore, it is difficult to connect the one end lead-out portion 38 to the wiring connection surface 16c outside the front surface of the sensor case 5 while passing the multicore cable 31 through the sensor case 5.

However, in the present embodiment, since the waterproof material is applied to the wiring body 3, high waterproof performance can be imparted to the wiring body 3 and the acceleration sensor assembly 1. The sensor housing 5 is configured as follows: a rear opening 13 is formed in the rear surface side of the housing body 10 and is closed by a rear cover 11. Therefore, the assembling property can be improved while securing the strength by the application of the pressure-resistant pipe 32. This point is explained below together with an example of the assembly sequence.

(Assembly of one end of Signal output device and Wiring body)

As shown in fig. 4, first, the cable glan head 18 is screwed to the rear cover 11 in a state of being removed from the housing main body 10. Then, the multicore cable 31 is inserted from the other end of the cable glan head 18 and led out from one end of the cable glan head 18. As described above, one end of the surrounding member 36 is positioned in the wiring insertion hole 15, and the plurality of electric wires 35 (one end lead-out portion 38) are drawn out to the outside of the inner surface of the rear cover 11. The drawn length of the electric wire 35 is adjusted, and the conductor 35a is exposed by removing the covering material 35b from the tip end of the electric wire 35.

On the other hand, one end of the pressure-resistant pipe 32 is opposed to the stepped surface of the cable gland 18. In this state, one end of the pressure pipe 32 is fastened to the multicore cable 31 by the cable gland 18 using the pipe clamp 37 a.

Next, as shown in fig. 5, the resin material 21 is filled in the wiring insertion hole 15 from the outside of the inner surface of the rear cover 11, and the resin material 21 is allowed to cure. Since the back cover 11 is removed from the housing body 10, the resin filling operation can be easily performed even on the inner surface side of the back cover 11. Only the starting portion of the electric wire 35 is fixed to the back cover 11 by the resin material 21, and the portion extending from the back cover 11 is not restricted by the back cover 11.

Next, as shown in fig. 6, in a state where the rear cover 11 is removed from the housing body 10, the one-end lead-out portion 38 is connected to the wiring connection surface 16c of the substrate 16. The connection work may be performed in a state where the stud 17a is attached to the back cover 11, or may be performed before the stud 17a is attached to the back cover 11.

Next, as shown in fig. 7, the back cover 11 is attached to the case body 10 in a state of being assembled with the cable glan head 18, the multi-core cable 31, the pressure-resistant pipe 32, the resin material 21, the fixing substrate 16a, and the stud 17a, and closes the back opening 13 of the case body 10. At this time, the fixed board 16a, the stud 17a, and the one-end lead-out portion 38 are accommodated in the case body 10. Since the fixed board 16a is formed to have a size that can pass through the rear opening 13, the storage work can be easily performed. A plurality of screw insertion holes 11a are formed through the outer peripheral edge of the rear cover 11. The back cover 11 is attached to the case body 10 by screws 19 inserted into the screw insertion holes from the outside of the back surface. The front cover 12 is removed from the housing body 10, and the front of the housing body 10 is opened.

Next, as shown in fig. 8, the flexible substrate 16b is attached to the stud 17a from the front outside by the spacer 17b and the screw 17c through the front opening 14. Then, the position of the substrate 16 is adjusted through the front opening 14, and a detection signal indicating acceleration is accurately generated. Then, the filling material 22 is filled into the case body 10 through the front opening 14. Then, the screw insertion holes 11a are filled with the filler 22 from the rear of the rear surface of the rear cover 11.

On the other hand, as shown in fig. 5, a sealing material 41 is provided so as to straddle between one end of the pressure-resistant pipe 32 and the surface of the signal output device 2 (the bulging portion 18c of the cable gland 18 in the present embodiment). The sealing material 41 is provided over the entire circumference. Thus, the gap between one end of the pressure tube 32 and the cable gland 18 can be sealed from the outside of the two

members

32, 18. Further, a sealing material 42 is provided in a form spanning between the first member 18A and the second member 18B of the cable gland head 18. The sealing material 42 is also provided over the entire circumference. Thereby, a gap (thread backlash) between the first member 18A and the second member 18B can be sealed from the outside of the both

members

18A, 18B.

Next, as shown in fig. 6, a waterproof material 33a is provided so as to span between one end of the pressure-resistant pipe 32 and the surface of the signal output device 2 (the outer peripheral surface of the cable gland 18 in the present embodiment). The waterproof material 33a is a band-shaped band member, and the waterproof material 33a is provided so as to continuously span the pressure pipe 32 and the signal output device 2 (cable glan head 18) in the circumferential direction and the axial direction by winding the band member in a spiral shape. The waterproof material 33a is formed of a material having water resistance, such as butyl rubber. The waterproof material 33a is also wound around the pipe clamp 37a, and is provided at one end of the pressure pipe 32 from the first member 18A to the center of the wiring body 3 than the place where the pipe clamp 37a is provided.

Next, as shown in fig. 7, a heat-shrinkable tube 34a is provided in a form of surrounding the waterproof material 33a from the outside, and the waterproof material 33a is hidden by the heat-shrinkable tube 34 a. The heat shrinkable tube 34a is shrunk by heating and is brought into close contact with the outer surface of the waterproof material 33 a.

Next, as shown in fig. 2, the front cover 12 is attached to the casing body 10, and the front opening 14 of the casing body 10 is closed.

(action)

As described above, the acceleration sensor assembly 1 according to the present embodiment includes the signal output device 2 that outputs the detection signal of the acceleration, and the wiring body 3 that is connected to the signal output device 2 at one end portion. The wiring body 3 includes an electric wire 35 that transmits the detection signal output by the signal outputter 2, a pressure-resistant pipe 32 that externally surrounds the electric wire 35, and a waterproof material 33a provided in a form spanning an outer surface of the pressure-resistant pipe 32 and a surface of the signal outputter 2.

Since the waterproof material 33a is provided so as to straddle the outer surface of the pressure pipe 32 and the surface of the signal output device 2, water can be prevented from penetrating through the gap between the pressure pipe 32 and the signal output device 2, and the waterproof performance of the wiring body 3 and the signal output device 2 can be improved. Further, since the wiring member 3 has a multiple structure, the protection of the electric wire 35 is improved.

One end of the pressure pipe 32 may be opposed to the surface of the signal outputting device 2. This eliminates the need to fit the pressure-resistant pipe 32 into the signal output device 2, and improves the ease of assembly of the acceleration sensor assembly 1. Even if the pressure-resistant pipe 32 is not fitted into the signal outputting device 2, the waterproof performance can be achieved by the waterproof material 33a provided outside thereof. This enables the signal output device 2 to be configured compactly.

The waterproof material 33a is a band-shaped band member that is wound so as to cover the outer circumferential surface of the pressure-resistant pipe 32. In this case, the outer circumferential surface of the pressure-resistant pipe 32 can be easily coated with the waterproof material 33a, and the waterproof performance can be easily improved.

Inside the waterproof material 33a, a sealing material 41 is provided so as to straddle one end of the pressure-resistant pipe 32 and the surface of the signal output device 2. Thus, the gap between the outer surface of the pressure-resistant pipe 32 and the surface of the signal output device 2 can be sealed with the sealing material 41, and therefore the possibility of water penetrating into the pressure-resistant pipe 32 can be further reduced. In the present embodiment, the cable gland head 18 is composed of the two

members

18A, 18B, and the sealing material 42 is provided so as to straddle the two

members

18A, 18B. Therefore, the possibility of water penetrating into the wiring body 3 and the signal output device 2 can be further reduced.

The wiring body 3 includes a heat shrinkable tube 34a surrounding the waterproof material 33a from the outside. Since the multi-structured wiring body 3 is covered with the heat shrinkable tube 34a, the appearance is improved and the protection of the electric wire 35 is improved.

Further, the signal outputter 2 includes a substrate 16 that generates an acceleration detection signal and a sensor case 5 that accommodates the substrate 16. The wiring body 3 is connected at one end thereof to a wiring connection surface 16c of the substrate 16. The sensor housing 5 includes a cylindrical housing body 10 having a rear opening 13, and a rear cover 11 attached to the housing body 10 and closing the rear opening 13. The rear opening 13 is formed so that a substrate 16 can pass through, the substrate 16 is accommodated in the housing body 10 with the wiring connection surface 16c facing the rear opening 13, and the rear cover 11 has a wiring insertion hole 15 through which the wiring body 3 is inserted.

According to this configuration, before the rear cover 11 is attached to the housing body 10, the wiring body 3 is inserted into the wiring insertion hole 15, and the wiring body 3 and the substrate 16 can be connected with each other in a state where the wiring body 3 is separated from the housing body 10. After the connection operation is completed, the wiring body 3, the back cover 11, and the substrate 16 are integrated, and the substrate 16 is accommodated in the housing body 10 through the back opening 13 and the back cover 11 is attached to the housing body 10, whereby the assembly operation of the signal output device 2 and the wiring body 3 is completed. In this way, since the connection work is performed in a state where the wiring body 3 is separated from the case main body 10, the assembling property of the acceleration sensor assembly 1 is improved.

The wire 35 of the wiring body 3 is connected to the wiring connection surface 16c, the wire 35 is inserted into the wiring insertion hole 15, and the pressure-resistant pipe 32 is formed to have a larger diameter than the wiring insertion hole 15. By using a large diameter pressure pipe 32, the strength of the wiring body 3 is increased. Even if the extension of the wiring body 3 becomes difficult due to the use of the pressure-resistant pipe 32, the acceleration sensor assembly 1 can be easily assembled as described above. The signal output device 2 can be configured compactly.

The wiring body 3 includes a plurality of wires 35 connected to the wiring connection surface 16c, and a surrounding material 36 that collects and surrounds the plurality of wires 35. At one end of the wiring body 3, the plurality of wires 35 are led out from the surrounding member 36 to form an end lead-out portion 38 exposed from the surrounding member. The one-end lead-out portion 38 and the surrounding material 36 may be fixed to the back cover 11 by the resin material 21. Even if the wiring body 3 is pulled, the back cover 11 can cope with a tensile load, and disconnection of the one-end lead-out portion 38 can be prevented.

As shown in fig. 1, the sealing

materials

41 and 42, the waterproof material 33a, and the heat shrinkable tube 34a are used only in a part of the end portion of the wiring body 3. At one end of the wiring body 3, the multicore cable 31 (electric wire 35) is covered with the pressure-resistant tube 32, the waterproof material 33a, and the heat-shrinkable tube 34a in this order. On the other hand, the outer peripheral surface of the pressure-resistant pipe 32 is exposed at the central portion of the wiring body 3, and the multi-core cable 31 is protected only by the pressure-resistant pipe 32. As described above, the wiring body 3 includes a portion between one end and the other end where the multicore cable 31 (the electric wire 35) is not covered with the

waterproof materials

33a and 33b, the

heat shrinkable tubes

34a and 34b, and the like. This allows the central portion of the wiring body 3 to retain flexibility, and the wiring body 3 to have relative displacement following performance.

As shown in fig. 3 and 9 to 14, the other end portion of the wiring body 3 and the electrical connector 4 are also considered in the same manner as described above, and the waterproof performance of the acceleration sensor assembly 1 is improved, the strength of the wiring body 3 is improved, and the durability of the acceleration sensor assembly 1 is improved.

(electric connector)

The electrical connector 4 includes a plurality of contacts (contacts) 50 connected to the plurality of wires 35, respectively, and the plurality of contacts 50 are accommodated in the connector housing 7. The connector housing 7 includes a contact housing 51, a cable housing 52, and a cover housing 53, and each of the housings 51 to 53 is formed in a cylindrical shape.

The contact housing 51 has a plurality of receiving holes 54 that receive the plurality of contacts 50, respectively. Each receiving hole 54 extends in the axial direction of the contact housing 51 and is open at both end surfaces of the contact housing 51.

A male screw is cut on the outer peripheral surface of the proximal end portion of the contact housing 51, and a female screw to be screwed with the male screw is cut on the inner peripheral surface of the distal end portion of the cable housing 52. The proximal end portion of the contact housing 51 is accommodated in the distal end portion of the cable housing 52, and is screwed to the distal end portion of the cable housing 52. The outer case 53 externally surrounds the contact case 51 and the cable case 52. The outer case 53 has an engaging piece 51a protruding from the inner peripheral surface thereof and engaging with the outer peripheral surface of the contact case 51.

An external thread is cut on the outer peripheral surface of the proximal end portion of the cable housing 52, and a cable gland 55 is screwed to the proximal end portion of the cable housing 52. The cable flange 55 protrudes from the connector housing 7, and has a wiring passage formed in the center thereof with both ends open to allow the wiring member 3 to be inserted therethrough. In this example, the cable gland head 55 is constructed of a single piece. The cable gland 55 has a female screw portion 55a to be screwed into the cable housing 52 and a drill portion 55b projecting from the female screw portion 55a, and a stepped surface is formed between the female screw portion 55a and the drill portion 55 b.

(Wiring body)

As shown in fig. 3, the other end of the wiring member 3 is inserted through a wiring passage of the cable gland 55, enters the connector housing 7, and is connected to the contact 50.

At this point, the other end of the multi-core cable 31 is led out from the other end of the pressure pipe 32 at the other end of the wiring body 3. The plurality of wires 35 are led out from the other end of the surrounding member 36 to form a second-end lead-out portion 39 exposed from the surrounding member 36. At the base end portion (end portion on the side closer to the covering member 36) of the other end lead-out portion 39, a covering member 35b is provided for holding each electric wire 35. At the tip end (end on the side away from the covering material 36) of the other end lead-out portion 39, the covering material 35b is peeled off to expose the conductor 35 a. The plurality of conductors 35a are electrically and mechanically connected to the contacts by a known connection means.

The multicore cable 31 in the wiring body 3 is inserted through the cable glan head 55 and into the connector housing 7. The other end of the surrounding material 36 extends out of the cable gland 55 and is contained within the cable housing 52. Conversely, the other end lead-out portion 39 starts within the cable housing 52. The plurality of electric wires 35 constituting the other end lead-out portion 39 are inserted from the starting points into the corresponding accommodation holes 54 and connected to the corresponding contacts 50.

The surrounding member 36 and the other end lead-out portion 39 are fixed to the cable housing 52 of the connector housing 7 by a resin member 61. The resin material 61 has the same properties as the resin material 21 described above. The resin material 61 is filled in the cable housing 52. Thereby, the surrounding material 36 (particularly, the outer peripheral surface of the portion extending from the cable glan head 55 and the cut portion at the other end) and the other-end lead-out portion 39 (particularly, the covering material 35b of the electric wire 35 at the starting portion) are fixed to the inner peripheral surface of the cable housing 52. Thus, even if the wiring body 3 is strongly pulled, the connector housing 7 can cope with a tensile load, and a high tensile strength can be imparted to the wiring body 3.

The interior of the connector housing 7, particularly the periphery of the base end side opening of the receiving hole 54 (the opening on the side where the other end lead-out portion 39 is led in), is filled with a filler 62 such as silicone rubber. The filler material 62 has the same properties as the filler material 22 described above. By filling the filler 62, even if foreign matter such as water or dust penetrates through the gaps between the housings 51 to 53, the foreign matter can be prevented from reaching the other end lead-out portion 39 or the contact 50, and high waterproof performance can be provided to the electrical connector 4.

The other end of the pressure tube 32 is positioned outside the connector housing 7 and opposite the aforementioned stepped surface of the cable gland 55. The drilling portion 55b enters an annular space formed between the inner peripheral surface of the pressure-resistant pipe 32 and the outer peripheral surface of the multicore cable 31, and is protected by the pressure-resistant pipe 32. The tube clamp 37b is provided in the other end of the pressure tube 32, particularly the portion covering the drill portion 55 b.

With this structure, the wiring member 3 can be given a large strength. On the other hand, water may infiltrate into the internal structure of the wiring body 3 from the other end of the pressure-resistant pipe 32. However, in the present embodiment, since the waterproof material 33b is applied to the wiring body 3, the electric connector 4 can be configured compactly while providing high waterproof performance to the wiring body 3 or the acceleration sensor assembly 1. This point is explained below together with an example of the assembly sequence.

(Assembly of the other end of the Electrical connector and Wiring body)

As shown in fig. 9, first, the other-end lead-out portion 39 is connected to the contact 50 in a state where the multi-core cable 31 is inserted into the cable gland 55 and the cable housing 52. Then, the contacts 50 are inserted into the respective accommodation holes 54 from the base end side, and the contacts 50 are accommodated in tip end portions of the respective accommodation holes 54. The plurality of electric wires constituting the other-end lead-out portion 39 are also partially inserted into the corresponding accommodation holes 54. Around the proximal end side opening of the accommodation hole 54, a covering material 35b is provided on each of the electric wires 35, and the exposed conductor 35a is positioned in the accommodation hole 54.

At this time, the cable case 52 is separated from the contact case 51, and is also separated from the cable glan head 55. The outer housing 53 may be assembled with the contact housing 51, or may be assembled before.

Next, as shown in fig. 10, the filler 62 is filled in the proximal end side opening of the accommodation hole 54. The filling material 62 is filled in such a manner as not to contact the tip end side of the accommodation hole 54, particularly the contact 50. The filler material 62 has viscosity such as silicone rubber. Therefore, the work of filling the filler 62 can be easily performed so that the filler 62 does not leak out to the tip end of the receiving hole 54 in which the contact 50 is received. The other end lead-out portion 39 (particularly, the covering material 35b of the electric wire 35 constituting the other end lead-out portion 39) is fixed to the inner peripheral surface of the accommodation hole 54 by the filler 62.

Next, as shown in fig. 11, the cable case 52 is screwed into the contact case 51, and the cable gland 55 is kept separated from the cable case 52. In this state, the resin material 61 is filled from the base end opening of the cable housing 52. The resin material 61 is provided to fill substantially the entire interior of the cable housing 52. The other end of the surround material 36 is positioned inside the cable housing 52. Therefore, the surrounding material 36 and the starting point portion of the other end lead-out portion 39 are fixed in the inner circumferential surface of the cable housing 52 by the resin material 61.

Next, as shown in fig. 12, the cable gland 55 is screwed into the cable housing 52. The other end of the pressure-resistant pipe 32 is fitted to the outside of the multicore cable 31. The other end of the pressure pipe 32 is fastened to the multicore cable 31 via the cable gland 55 by the pipe clamp 37b in a state where the other end of the pressure pipe 32 faces the step surface of the cable gland 55.

Next, as shown in fig. 13, the sealing member 43 is provided so as to straddle the other end portion of the pressure pipe 32 and the surface of the electrical connector 4 (the outer peripheral surface of the female screw portion 55a of the cable gland 55 in the present embodiment). The sealing material 43 is provided over the entire circumference. Thus, the gap between the other end of the pressure tube 32 and the cable gland 55 is sealed from the outside of the two

members

32, 55. Further, the sealing material 44 is provided so as to straddle the outer peripheral surface of the cable gland 55 and the outer peripheral surface of the cable housing 52. The sealing material 44 is also provided over the entire circumference. Thereby, the gap (thread backlash) between the two

members

55, 52 is sealed from the outside of the two

members

55, 52.

Next, as shown in fig. 14, a waterproof material 33b is provided so as to straddle the other end portion of the pressure pipe 32 and the surface of the electrical connector 4 (the outer peripheral surface of the cable gland 55 in the present embodiment). The waterproof material 33b has the same properties as the waterproof material 33a, and is provided in the same manner as the waterproof material 33 a. The waterproof material 33b is also wound around the pipe clamp 37 b. The waterproof material 33b is provided on the other end portion of the pressure-resistant pipe 32 from the cable housing 52 to the center of the wiring body 3 than the place where the pipe clamp 37b is provided.

Next, as shown in fig. 3, a heat-shrinkable tube 34b is provided in a form of surrounding the waterproof material 33b from the outside, and the waterproof material 33b is hidden by the heat-shrinkable tube 34 b. The heat shrinkable tube 34b is shrunk by heating and is brought into close contact with the outer surface of the waterproof material 33 b.

(action)

As described above, the acceleration sensor assembly 1 according to the present embodiment includes the electrical connector 4 connected to the other end of the wiring member 3, and the wiring member 3 includes the waterproof member 33b provided so as to straddle the outer surface of the pressure pipe 32 and the surface of the electrical connector 4. This can prevent water from penetrating through the gap between the pressure pipe 32 and the electrical connector 4, and can improve the waterproof performance of the wiring body 3 and the electrical connector 4.

The other end of the pressure pipe 32 faces the surface of the electrical connector 4. The pressure pipe 32 is not inserted into the electrical connector 4, and the assembling performance of the acceleration sensor assembly 1 can be improved. Even if the pressure-resistant pipe 32 is not fitted into the electrical connector 4, the waterproof performance can be achieved by the waterproof material 33b provided on the outside thereof. This enables the electric connector 4 to be configured compactly.

Inside the waterproof material 33b, a sealing material 43 is provided so as to straddle the other end portion of the pressure pipe 32 and the surface of the electrical connector 4. In this case, since the gap between the outer surface of the pressure pipe 32 and the surface of the electrical connector 4 can be sealed with the sealing material 43, the possibility of water penetrating into the pressure pipe 32 can be further reduced.

Further, at the other end portion of the wiring body 3, the plurality of wires 35 are led out from the surrounding member 36, and a second end lead-out portion 39 exposed from the surrounding member 36 is formed. The electrical connector 4 includes a plurality of contacts 50 connected to the plurality of wires 35, respectively, and a connector housing 7 into which the other end portion of the wiring body 3 is inserted and which accommodates the plurality of contacts 50. The connector housing 7 is filled with a resin material 61 for fixing the surrounding material 36 and the connector housing 7.

Accordingly, even if the wiring body 3 is strongly pulled, the tensile load can be applied by the resin material 61 and the connector housing 7, and the plurality of wires 35 can be prevented from being broken.

The resin material 61 further fixes the connector housing 7 and the plurality of electric wires 35. Therefore, even if a tensile load acts on the wiring body 3, the positions of the plurality of wires 35 are stable, and the connection state between the plurality of wires 35 and the contact 50 can be maintained.

The connector housing 7 has a plurality of receiving holes 54 for receiving the plurality of contacts 50, respectively, and the plurality of electric wires 35 are inserted into corresponding ones of the plurality of receiving holes 54 and fixed to edge portions of the receiving holes 54. Since the plurality of wires 35 are fixed to the connector housing 7, the strength of the wiring body 3 against pulling is further improved. In addition, the filler 62 for this fixation is provided so as not to contact the contact 50. Since the contacts 50 are not firmly bound to the contact housing 51 by the filler material 62, it is easy to connect the external connector with the electrical connector 4.

The embodiments have been described so far, but the above-described configuration may be adaptively changed, deleted, or added within the scope of the present invention.

Claims

1. An acceleration sensor assembly characterized in that,

the disclosed device is provided with:

a signal outputter including a substrate generating a detection signal of acceleration, and a sensor case accommodating the substrate; and

a wiring body connected to the wiring connection surface of the substrate at one end portion,

the sensor housing includes:

a cylindrical housing main body having a back opening and a front opening; and

a back cover mounted on the housing main body and closing the back opening,

a front cover mounted on the housing main body and closing the front opening,

the rear surface opening portion is formed so that the substrate can pass therethrough, the substrate is accommodated in the case main body so that the wiring connection surface faces the rear surface opening portion, and the rear surface cover has a wiring insertion hole through which the wiring body is inserted;

the front opening is formed at a position opposite to the rear opening in an extending direction of the wiring body;

the two substrates are accommodated in the sensor housing;

the two substrates are juxtaposed in the extending direction of the wiring body.

2. The acceleration sensor assembly of claim 1,

the wiring body includes:

an electric wire connected to the wiring connection surface; and

a pressure-resistant tube surrounding the electric wire from the outside,

the electric wire is inserted into the wiring insertion hole, and the diameter of the pressure-resistant pipe is larger than that of the wiring insertion hole.

3. The acceleration sensor assembly of claim 1,

the wiring body includes:

a plurality of wires connected to the wiring connection surface; and

a surrounding material that collects and surrounds the plurality of electric wires,

at the one end portion of the wiring body, the plurality of wires are led out from the surrounding material to form one end lead-out portion exposed from the surrounding material,

the one-end lead-out portion and the surrounding material are fixed to the back cover by a resin material.

4. The acceleration sensor assembly according to any one of claims 1 to 3,

the signal output device is mounted on a bogie of the railway vehicle.