CN108508230A - Acceleration transducer assembly - Google Patents

Abstract

An acceleration sensor assembly includes: a signal output device including a substrate generating an acceleration detection signal; a sensor case housing the substrate; and a wiring body connected to a wiring connection surface of the substrate at one end. The sensor case includes a cylindrical case main body having a rear opening; and a rear cover attached to the case main body to close the rear opening. The rear opening is formed so that the substrate can pass through. The substrate is accommodated in the case main body with the wiring connection surface facing the rear opening. The rear cover has a wiring insertion hole through which the wiring body is inserted. According to the present invention, the assemblability 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 device including a sensor case housing a substrate for generating acceleration detection signals, and a wiring body connected to a wiring connection surface of the substrate at one end.

Background technique

The acceleration converter disclosed in JP2005-274163A has a housing portion that accommodates an acceleration conversion element. The cable is connected to the acceleration conversion element inside the shell, and extends from the back wall of the shell to the outside of the shell. The acceleration conversion element includes a substrate. In general, the substrate is housed in the case with the surface connected to the cable facing the rear wall.

When assembling the accelerometer, the switch cover is removed, and the front of the housing is left open. The cable is inserted into the shell from the back wall, and the end of the cable extends from the front opening to the outside of the shell. And, outside the front surface of the case, the cable and the substrate are joined together. Then, the cable is pulled from the outside of the rear surface, and the acceleration conversion element connected to the cable is accommodated in the case. After adjusting the position of the acceleration conversion element through the front opening, install the switch cover on the case.

Contents of the invention

Problems to be solved by the invention:

In the state where the cable is inserted through the case, it is cumbersome to perform the joining operation outside the case. Due to the structure of the wiring body, the end of the cable cannot be fully extended out of the housing, and it is difficult or impossible to assemble in the above sequence.

An object of the present invention is to improve the assemblability of an acceleration sensor assembly.

Means to solve the problem:

An acceleration sensor assembly according to an aspect of the present invention includes: a signal output device including a substrate generating a detection signal of acceleration, and a sensor case housing the substrate; and a wiring connected to the substrate at one end. The sensor case includes a cylindrical case main body having a back opening, and a back cover mounted on the case main body to close the back opening, the back opening The portion is formed so that the substrate can pass through, the substrate is accommodated in the case main body with the wiring connection surface facing the rear opening, and the rear cover has a The wiring insertion hole.

According to the above configuration, before attaching the back cover to the case body, the wiring body can be 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 body. . After the connection work is completed, in the state where the wiring body, the back cover and the substrate are integrated, the substrate is accommodated in the case body through the back opening and the back cover is installed on the case body, the signal output device and the wiring body The assembly work is complete. In this way, since the connection work is performed in a state where the wiring body is separated from the case main body, the assemblability of the acceleration sensor assembly is improved.

The wiring body may also include electric wires connected to the wiring connection surface and a pressure-resistant tube surrounding the electric wires from the outside, the electric wires are inserted through the wiring insertion holes, and the pressure-resistant tubes The diameter is formed to be larger than the wiring insertion hole.

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

The wiring body may also include a plurality of wires connected to the wiring connection surface, and a surrounding material that collects and surrounds the plurality of wires, and at the one end of the wiring body, the plurality of An electric wire is led out from the surrounding material to form a one-end lead-out portion exposed from the surrounding material, and the one-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 it is possible to suppress disconnection of the lead-out portion at one end.

The signal output device can be installed on the bogie of the railway vehicle.

According to the above configuration, it is possible to smoothly follow the relative displacement between the bogie and the vehicle body when the railway vehicle is running.

Invention effect:

According to the present invention, the assemblability of the acceleration sensor assembly can be improved.

Description of drawings

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

Fig. 2 is a cross-sectional view of one end of the signal output device and the wiring body;

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

Fig. 4 is an explanatory diagram of the assembly sequence of the signal output device and the wiring body;

Fig. 5 is an explanatory diagram of the assembly sequence of the signal output device and the wiring body;

Fig. 6 is an explanatory diagram of the assembly sequence of the signal output device and the wiring body;

Fig. 7 is an explanatory diagram of the assembly sequence of the signal output device and the wiring body;

Fig. 8 is an explanatory diagram of the assembly sequence of the signal output device and the wiring body;

FIG. 9 is an explanatory diagram of the assembly sequence of the electrical connector and the wiring body;

FIG. 10 is an explanatory diagram of the assembly sequence of the electrical connector and the wiring body;

Fig. 11 is an explanatory diagram of the assembly sequence of the electrical connector and the wiring body;

Fig. 12 is an explanatory diagram of the assembly sequence of the electrical connector and the wiring body;

Fig. 13 is an explanatory diagram of the assembly sequence of the electrical connector and the wiring body;

Fig. 14 is an explanatory diagram of the assembly sequence of the electrical connector and the wiring body;

Fig. 15 is a side view of a railway vehicle equipped with an acceleration sensor assembly;

Symbol Description:

1 Acceleration sensor assembly;

2 signal output device;

3 wiring body;

4 electrical connectors;

5 sensor housing;

7 connector housing;

10 shell main body;

11 rear cover;

13 rear opening;

15 wiring insertion holes;

16 substrate;

16c Wiring connection surface;

21, 61 resin material;

32 pressure pipe;

33a, 33b waterproof material;

34a, 34b heat shrink tube;

35 wires;

36 Surrounding material;

38 one end lead-out part;

39 the other end lead-out part;

41～44 sealing material;

50 contacts;

54 Receiving holes.

Detailed ways

Hereinafter, embodiments will be described with reference to the drawings. The same or corresponding elements are denoted by the same symbols in all the drawings, and repeated detailed explanations are omitted.

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

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

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

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

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 with bolts (not shown) inserted through the flange 6 (see FIG. 1 ), so that the acceleration sensor assembly 1 is mounted on the railway vehicle 100 . In the illustrated example, the signal output device 2 is placed on the upper surface of the bogie frame 102 of the bogie 101 and the bolts are inserted downward, 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. A controller 104 for inputting a detection signal generated by the acceleration sensor assembly 1 is mounted on the vehicle body 103 . A cable 105 extends from the controller 104 , and a repeater 106 is installed at the tip of the cable 105 to be electrically and mechanically connected to the electrical connector 4 . The electrical connector 4 and the repeater 106 are arranged on the lower surface of the vehicle body 103 . Furthermore, the electrical connector 4 and the repeater 106 are arranged at a position distant from the bogie 101 by a certain distance in the vehicle length direction, or at a position overlapping with an end portion 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 repeater 106 are arranged away from the bogie 101 by a certain distance toward the center side 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 of the railway vehicle 100 in the vehicle length direction. Cable 105 extends from repeater 106 to 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 adaptively changed. Although detailed illustration is omitted, the electrical connector 4 and the repeater 106 may be arranged so as to overlap with the center of the bogie 101 when viewed in the vertical direction, and the wiring body 3 may be directed from the signal output device 2 toward the bogie. The center of 101 extends out.

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

The acceleration sensor assembly 1 mounted as above is installed in a place where dust and dirt are likely to be generated, a place where there is a chance of contact with sundries such as mud or stones, 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 protection performance. Also, in the case of a railway vehicle, the vehicle body and the bogie are displaced in the horizontal direction when traveling in a curve, and therefore the wiring body 3 of the acceleration sensor assembly 1 is required to smoothly follow the relative displacement. If the wiring body 3 is formed so as to be easy to follow, the wiring body 3 will generate a local tensile load, which may cause the wiring body 3 to be disconnected. Therefore, the wiring body 3 is required to have high durability and tensile strength.

(signal output device)

As shown in FIG. 2 , the sensor case 5 of the signal outputter 2 has a case main body 10 , a rear cover 11 and a front cover 12 . The case main 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 case main 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 rear cover 11 is attached to the case main body 10 to close the rear opening 13 . The front cover 12 is attached to the casing main body 10 to close the front opening 14 . The back cover 11 has a wiring insertion hole 15 through which one end of the wiring body 3 is inserted. The back cover 11 is formed in a disk shape, and the wiring insertion hole 15 is formed through the center part of the back cover 11 .

The signal output unit 2 has a substrate 16 that generates a detection signal indicating the acceleration of the object 9 to be measured, and the substrate 16 is accommodated in the sensor case 5 (inside the case main body 10 ). The substrate 16 includes a fixed substrate 16a and a flexible substrate 16b. Electrodes (not shown) required for signal generation are arranged on the facing surfaces of the two substrates 16a and 16b. The two substrates 16a and 16b are arranged at intervals in the axial direction of the housing body 10 . The fixed substrate 16 a is positioned near the rear opening 13 , and the flexible substrate 16 b is positioned away from the rear opening 13 (ie, near the front opening 14 ). The fixed substrate 16 a has a wiring connection surface 16 c that is the reverse side of the above-mentioned facing surface, and the wiring connection surface 16 c faces the rear opening 13 . The substrate 16 is formed in a size capable of passing through the rear opening 13 , and in this example is formed in a size capable of passing through the front opening 14 as well.

The fixed substrate 16 a is provided on a plurality of studs 17 a inserted into the inner surface of the back cover 11 . A spacer (spacer) 17b is provided between the facing surfaces of the two substrates 16a, 16b. The screws 17c are sequentially inserted through the flexible substrate 16b, the spacer 17b, and the fixed substrate 16a from the reverse side of the facing surface of the flexible substrate 16b, and are screwed to the studs 17a. Thereby, both board|substrates 16a, 16b are supported by the back cover 11. As shown in FIG. The studs 17 a are arranged at intervals in the circumferential direction on the radially outer peripheral side of the wiring insertion hole 15 .

Internal threads are cut on the inner peripheral surface of the wiring insertion hole 15 , and a cable gland 18 is screwed into the wiring insertion hole 15 . The cable gland 18 protrudes from the rear cover 11 to the outside of the rear surface of the sensor case 5 , and at its center, a wiring path is formed with both ends open for insertion of the wiring body 3 . The cable gland 18 has an external thread portion 18 a screwed into the wiring insertion hole 15 at one end thereof. The cable gland 18 has a drill portion 18b at its tip end. The cable gland 18 has a bulging portion 18c that bulges in the radial direction between the external thread portion 18a and the drill portion 18b, and a stepped surface is formed between the bulging portion 18c and the drill portion 18b.

The cable gland 18 is composed of a first member 18A having an external thread portion 18a, and a second member 18B having a drill portion 18b and a bulging portion 18c. By screwing the second member 18B to the first member 18A, both members 18A and 18B are integrated as the cable gland 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 housing 5 .

(wiring body)

As shown in FIGS. 2 and 3 , the wiring body 3 is a multilayer structure including a multi-core cable 31 , a pressure-resistant tube 32 , waterproof materials 33 a , 33 b , and heat-shrinkable tubes 34 a , 34 b.

The multi-core cable 31 is composed of a plurality of electric wires 35 and an enclosing material 36 that collects and surrounds the plurality of electric wires 35 . The number of wires 35 is not particularly limited. Each electric wire 35 is comprised from the conductor 35a and the covering material 35b which has insulation and coats the conductor 35a. The conductor 35a may be a single wire or a twisted wire. The enclosing material 36 includes an insulating coating that forms the sheath of the multi-core cable 31 , and may include mesh-shaped shielded wires.

The pressure-resistant tube 32 surrounds the electric wire 35 from the outside, more specifically, the multi-core cable 31 . The pressure-resistant tube 32 has a greater tensile strength than the multi-core cable 31 or its electric wire 35, and the pressure-resistant tube 32 surrounds the multi-core cable 31, thereby increasing the tensile strength of the wiring body 3 and simultaneously protecting the multi-core cable. Line 31 is protected from external influences (dust, foreign matter, wind and rain, etc.).

Both ends of the pressure-resistant tube 32 are fastened to the outer peripheral surface of the surrounding material 36 of the multi-core cable 31 by known hose bands 37 a and 37 b via the cable gland 18 . Thus, the pressure-resistant tube 32 is fixed to the multi-core cable 31 . One end of the pressure-resistant tube 32 is located outside the sensor housing 5 of the signal output device 2 , and the other end of the pressure-resistant tube 32 is located outside the connector housing 7 of the electrical connector 4 .

As shown in Figure 2, one end of the wiring body 3 is inserted into the wiring channel of the cable gland 18, passes through the wiring insertion hole 15, enters the sensor housing 5 (inside the housing main body 10), and is connected with The wiring connection surface 16c of the substrate 16 is connected.

In this regard, at one end of the wiring body 3 , one end of the multi-core cable 31 is led out from one end of the pressure-resistant tube 32 . Furthermore, the plurality of electric wires 35 are led out from one end of the surrounding material 36 to form an end leading-out portion 38 exposed from the surrounding material 36 . At the base end portion of the one-end lead-out portion 38 (the end portion on the side close to the surrounding material 36 ), the covering material 35 b is provided to hold the respective electric wires 35 . At the tip end portion (the end portion away from the surrounding material 36 side) of the one end lead-out portion 38, the covering material 35b is peeled off to expose the conductor 35a. The plurality of conductors 35a are electrically and mechanically connected to the wiring connection surface 16c of the substrate 16 by known bonding means.

The multi-core cable 31 in the wiring body 3 is inserted through the cable gland 18 and enters the sensor case 5 . The axial length of the male thread portion 18 a of the cable gland 18 is shorter than that of the wiring insertion hole 15 . The tip end of the external thread portion 18 a is positioned in the wiring insertion hole 15 . One end of the surrounding material 36 extends outward from the cable gland 18 and is accommodated in the wiring insertion hole 15 on the other hand. One end of the surrounding material 36 is positioned between the tip end of the externally threaded portion 18 a (one end of the cable gland 18 ) and the inner surface of the rear cover 11 . Conversely, the starting point of the one-end lead-out portion 38 is inside the wiring insertion hole 15 . The one-end lead-out portion 38 enters the case main body 10 from this starting point, and is connected to the wiring connection surface 16 c facing the rear opening 13 .

The surrounding material 36 and the one-end lead-out portion 38 are fixed to the rear cover 11 through the resin material 21 . The resin material 21 is filled into the wiring insertion hole 15 from the inner surface side of the back cover 11 . Thus, the surrounding material 36 (particularly the part of the outer peripheral surface extending from the cable gland 18 and the notch at one end) and the one-end lead-out part 38 (particularly the covering material 35b of the electric wire 35 at the starting point) are fixed to the distribution socket. The inner peripheral surface of the through hole 15 (especially the internal thread cut there) and one end surface of the cable gland 18 . Thereby, even if the wiring body 3 is pulled strongly, the sensor case 5 and the cable gland 18 can cope with the tensile load, and high pulling strength can be given to the wiring body 3 .

In addition, the inside of the sensor case 5 is filled with a filling material 22 such as silicone rubber. Since the filling material 22 is an insulating material, no short circuit occurs between the one-end lead-out portion 38 and the substrate 16 . Since the filling material 22 is an elastic material, it does not interfere with the movement of the flexible substrate 16 b and does not degrade the acceleration detection performance of the signal output device 2 . By filling the filling material 22, even if foreign matter such as water or dust penetrates into the housing main body 10 through the back opening 13 or the front opening 14, it can be prevented from reaching the substrate 16 or the one-end lead-out portion 38, and the signal output device 2 can be given a higher High waterproof performance.

The diameter of the pressure-resistant tube 32 is larger than that of the wiring insertion hole 15 . One end of the pressure-resistant tube 32 is positioned outside the sensor housing 5 and faces the above-mentioned stepped surface of the cable gland 18 . The drill portion 18 b enters into an annular space formed between the inner peripheral surface of the pressure-resistant tube 32 and the outer peripheral surface of the multi-core cable 31 , and is protected by the pressure-resistant tube 32 . The pipe clamp 37a is provided in one end portion of the pressure-resistant pipe 32, especially a portion covering the drill portion 18b.

With this structure, a large strength can be imparted to the wiring body 3 . On the other hand, there is a concern that water penetrates into the internal structure of the wiring body 3 from one end of the pressure-resistant tube 32 . Also, the relative position of the multi-core cable 31 with respect to the pressure-resistant tube 32 is restricted. Therefore, it is difficult for the multi-core cable 31 to enter the sensor case 5 and extend from the front opening 14 . Therefore, it is difficult to pass the multi-core cable 31 through the sensor case 5 and connect the one-end lead-out portion 38 to the wiring connection surface 16 c outside the front surface of the sensor case 5 .

However, in this embodiment, a waterproof material is applied to the wiring body 3 , so that the wiring body 3 and thus the acceleration sensor assembly 1 can be given high waterproof performance. In addition, the sensor case 5 has a structure in which a rear opening 13 is formed on the rear side of the case main body 10 and is closed with a rear cover 11 . Therefore, it is possible to improve assemblability while ensuring strength by using the pressure-resistant tube 32 . Hereinafter, this point will be described together with an example of the assembly sequence.

(Assembly of the signal output device and one end of the wiring body)

As shown in FIG. 4 , first, the cable gland 18 is screwed to the rear cover 11 in a state detached from the case main body 10 . Then, the multi-core cable 31 is inserted from the other end of the cable gland 18 and drawn out from one end of the cable gland 18 . As described above, one end of the surrounding material 36 is positioned in the wiring insertion hole 15 , and the plurality of electric wires 35 (one-end lead-out portion 38 ) is pulled out to the outside of the inner surface of the back cover 11 . The drawn-out length of the electric wire 35 is adjusted, and the covering material 35b is peeled off at the distal end of the electric wire 35 to expose the conductor 35a.

On the other hand, one end of the pressure-resistant tube 32 faces the stepped surface of the cable gland 18 . In this state, one end portion of the pressure-resistant tube 32 is fastened to the multi-core cable 31 via the cable gland 18 by the tube clamp 37a.

Next, as shown in FIG. 5 , the resin material 21 is filled in the wiring insertion hole 15 from outside the inner surface of the rear cover 11 , and the resin material 21 is waited for to be cured. Since the back cover 11 is detached from the case body 10 , resin filling work can be easily performed even on the inner surface side of the back cover 11 . Only the starting point of the electric wire 35 is fixed to the rear cover 11 by the resin material 21 , and the portion extending from the rear cover 11 is not restricted by the rear cover 11 .

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

Next, as shown in FIG. 7, the rear cover 11 is mounted on the cable gland 18, the multi-core cable 31, the pressure-resistant tube 32, the resin material 21, the fixed base plate 16a, and the stud 17a in the assembled state. The case main body 10 closes the back opening 13 of the case main body 10 . At this time, the fixed base plate 16 a , the stud 17 a , and the one-end lead-out portion 38 are accommodated in the case main body 10 . Since the fixed substrate 16a is formed in such a size that it can pass through the back opening 13, this accommodating work can be easily performed. A plurality of screw insertion holes 11 a are formed through the outer peripheral portion of the back cover 11 . The rear cover 11 is attached to the case main body 10 with screws 19 inserted into the screw insertion holes from the rear outside. In addition, the front cover 12 is removed from the case body 10, and the front side of the case body 10 is opened.

Next, as shown in FIG. 8 , the flexible board 16 b is attached to the stud 17 a from the outside of the front through the front opening 14 using the spacer 17 b and the screws 17 c. Then, the position adjustment operation of the board|substrate 16 is performed through the front opening part 14, and the detection signal which shows an acceleration is correctly generated. Then, the filling material 22 is filled into the case main body 10 through the front opening 14 . Then, the filler 22 is filled into the screw insertion holes 11 a from the rear of the rear surface of the rear cover 11 .

On the other hand, as shown in FIG. 5 , a sealing material is provided so as to straddle between one end of the pressure-resistant tube 32 and the surface of the signal output device 2 (in this embodiment, the bulging portion 18c of the cable gland 18 ). 41. The sealing material 41 is provided over the entire circumference. Thereby, the gap between one end of the pressure-resistant tube 32 and the cable gland 18 can be sealed from the outside of both members 32 and 18 . Furthermore, a sealing material 42 is provided to span between the first member 18A and the second member 18B of the cable gland 18 . The sealing material 42 is also provided over the entire circumference. Thereby, the gap (thread backlash) between the first member 18A and the second member 18B can be sealed from the outside of both members 18A, 18B.

Next, as shown in FIG. 6 , a waterproof material 33 a is provided so as to span between one end of the pressure-resistant tube 32 and the surface of the signal output device 2 (in this embodiment, the outer peripheral surface of the cable gland 18 ). The waterproof material 33a is a belt-shaped belt member, and by winding the belt member in a spiral shape, the pressure-resistant tube 32 and the signal output device 2 (cable gland 18 ) can be continuously straddled in the circumferential direction and the axial direction. A waterproof material 33a is provided in the form. The waterproof material 33a is formed of a water-resistant material such as butyl rubber, for example. The waterproof material 33a is also wound around the pipe clip 37a, and is provided at one end of the pressure-resistant pipe 32 from the first member 18A to the center of the wiring body 3 closer to the place where the pipe clip 37a is provided.

Next, as shown in FIG. 7, the heat-shrinkable tube 34a is provided so as to surround the waterproof material 33a from the outside, and the waterproof material 33a is hidden by the heat-shrinkable tube 34a. The heat-shrinkable tube 34a shrinks when heated, and is in close contact with the outer surface of the waterproof material 33a.

Next, as shown in FIG. 2 , the front cover 12 is attached to the case body 10 to close the front opening 14 of the case body 10 .

(effect)

In this way, the acceleration sensor assembly 1 according to the present embodiment includes the signal output device 2 that outputs the acceleration detection signal, and the wiring body 3 connected to the signal output device 2 at one end. The wiring body 3 includes an electric wire 35 that transmits the detection signal output by the signal output device 2, a pressure-resistant tube 32 surrounding the electric wire 35 from the outside, and is arranged in a form that straddles the outer surface of the pressure-resistant tube 32 and the surface of the signal output device 2. waterproof material 33a.

Since the waterproof material 33a is set in the form of straddling the outer surface of the pressure-resistant pipe 32 and the surface of the signal output device 2, water can be prevented from infiltrating from the gap between the pressure-resistant pipe 32 and the signal output device 2, and the wiring body 3 can be improved. And the waterproof performance of the signal output device 2. Moreover, since the wiring body 3 has a multiple structure, the protection property of the electric wire 35 improves.

One end of the pressure-resistant tube 32 may face the surface of the signal outputter 2 . Accordingly, it is not necessary to fit the pressure-resistant tube 32 into the signal output device 2, and the assemblability of the acceleration sensor assembly 1 is improved. Even if the pressure-resistant tube 32 is not embedded in the signal output device 2, the waterproof performance can be achieved by the waterproof material 33a provided outside it. Thereby, the signal outputter 2 can be comprised compactly.

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

A sealing material 41 is provided inside the waterproof material 33 a so as to straddle one end of the pressure-resistant tube 32 and the surface of the signal output device 2 . In this way, the gap between the outer surface of the pressure-resistant tube 32 and the surface of the signal output device 2 can be sealed with the sealing material 41 , so that the possibility of water seeping into the pressure-resistant tube 32 can be further reduced. In the present embodiment, the cable gland 18 is composed of two members 18A, 18B, and the sealing material 42 is provided so as to straddle the two members 18A, 18B. Therefore, it is possible to further reduce the possibility of water seeping into the interior of the wiring body 3 and the signal output device 2 .

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

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

According to this structure, before attaching the back cover 11 to the case body 10, the wiring body 3 can be inserted into the wiring insertion hole 15, and the wiring body 3 can be placed in a state where the wiring body 3 is separated from the case body 10. The wire body 3 is connected to the substrate 16 . After the connection work is completed, in the state where the wiring body 3, the back cover 11 and the substrate 16 are integrated, the substrate 16 is accommodated in the case main body 10 through the back opening 13 and the back cover 11 is attached to the case main body 10, Then the assembly work 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 assemblability of the acceleration sensor assembly 1 is improved.

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

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

In addition, as shown in FIG. 1 , the sealing materials 41 and 42 , the waterproof material 33 a and the heat-shrinkable tube 34 a are used only in a part of one end of the wiring body 3 . At one end of the wiring body 3 , the multi-core cable 31 (electric wire 35 ) is covered with a pressure-resistant tube 32 , a waterproof material 33 a , and a heat-shrinkable tube 34 a in this order. On the other hand, in the central portion of the wiring body 3 , the outer peripheral surface of the pressure-resistant tube 32 is exposed, and the multi-core cable 31 is protected only by the pressure-resistant tube 32 . Thus, between one end and the other end of the wiring body 3 , there is a portion where the multi-core cable 31 (wire 35 ) is not covered with the waterproof material 33 a , 33 b or the heat-shrinkable tube 34 a , 34 b . Thereby, the central portion of the wiring body 3 can be kept flexible, and the wiring body 3 can be further equipped with relative displacement tracking performance.

As shown in Figure 3 and Figures 9-14, for the other end of the wiring body 3 and the electrical connector 4, the same considerations as above are also considered, and the waterproof performance of the acceleration sensor assembly 1 and the strength of the wiring body 3 are improved. This improves the durability performance of the acceleration sensor assembly 1 .

(electrical connector)

The electrical connector 4 includes a plurality of contacts 50 respectively connected to a plurality of electric wires 35 , 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 jacket housing 53, and any of the housings 51-53 is formed in a cylindrical shape.

The contact housing 51 has a plurality of accommodating holes 54 respectively accommodating a plurality of contacts 50 . Each accommodation hole 54 extends in the axial direction of the contact housing 51 and opens at both end surfaces of the contact housing 51 .

The outer peripheral surface of the base end portion of the contact housing 51 is cut with external threads, while the inner peripheral surface of the tip end portion of the cable housing 52 is cut with internal threads screwed with the external threads. The base end portion of the contact housing 51 is accommodated in the tip end portion of the cable housing 52 and is screwed to the tip end portion of the cable housing 52 . The jacket housing 53 surrounds the contact housing 51 and the cable housing 52 from the outside. The outer casing 53 has an engaging piece 51 a that protrudes from the inner peripheral surface and engages with the outer peripheral surface of the contact housing 51 .

The outer peripheral surface of the base end portion of the cable housing 52 is cut with external threads, and the cable gland 55 is screwed to the base end portion of the cable housing 52 . The cable gland 55 protrudes from the connector housing 7, and a wiring path is formed in the center of which the both ends are opened so that the wiring body 3 can be inserted therethrough. In this example, the cable gland 55 is composed of a single part. The cable gland 55 has an internal thread portion 55a screwed into the cable housing 52 and a drill portion 55b protruding from the internal thread portion 55a, and a stepped surface is formed between the internal thread portion 55a and the drill portion 55b.

(wiring body)

As shown in FIG. 3 , the other end of the wiring body 3 is inserted into the wiring path 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-resistant tube 32 at the other end of the wiring body 3 . Furthermore, the plurality of electric wires 35 are led out from the other end of the surrounding material 36 to form the other end lead-out portion 39 exposed from the surrounding material 36 . At the base end portion of the other end lead-out portion 39 (the end portion on the side close to the surrounding material 36 ), the covering material 35 b is provided to hold the respective electric wires 35 . At the tip end portion (the end portion away from the surrounding material 36 side) of the other end lead-out portion 39, the covering material 35b is peeled off to expose the conductor 35a. The plurality of conductors 35a are electrically and mechanically connected to the contacts using known connection means.

The multi-core cable 31 in the wiring body 3 is inserted through the cable gland 55 and enters into the connector housing 7 . The other end of the surrounding material 36 extends outward from the cable gland 55 and is accommodated in the cable housing 52 . Conversely, the starting point of the other end lead-out portion 39 is inside the cable housing 52 . The plurality of electric wires 35 constituting the other-end lead-out portion 39 are inserted into corresponding receiving holes 54 from the starting point, and are connected to corresponding contacts 50 .

The surrounding material 36 and the other end lead-out portion 39 are fixed to the cable housing 52 of the connector housing 7 through the resin material 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 . Thus, the surrounding material 36 (particularly the outer peripheral surface of the portion extending from the cable gland 55 and the cutout 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 point) are fixed to the The inner peripheral surface of the cable housing 52 . Thereby, even if the wiring body 3 is pulled strongly, the tensile load can be coped with by the connector housing 7, and high pulling strength can be given to the wiring body 3.

The inside of the connector housing 7 , especially the periphery of the proximal opening of the accommodation hole 54 (the opening on the side where the other end lead-out portion 39 is introduced) is filled with a filler material 62 such as silicone rubber. The filler 62 has the same properties as the aforementioned filler 22 . By filling the filling material 62 , even if foreign matter such as water or dust penetrates through the gaps of the housings 51 to 53 , it can be prevented from reaching the other end lead-out portion 39 or the contact point 50 , thereby imparting high waterproof performance to the electrical connector 4 .

The other end of the pressure-resistant tube 32 is positioned outside the connector housing 7 and faces the above-mentioned stepped surface of the cable gland 55 . The drill portion 55 b enters into an annular space formed between the inner peripheral surface of the pressure-resistant tube 32 and the outer peripheral surface of the multi-core cable 31 , and is protected by the pressure-resistant tube 32 . The pipe clip 37b is provided in the other end portion of the pressure-resistant pipe 32, especially in a portion covering the drill portion 55b.

With this structure, a large strength can be imparted to the wiring body 3 . On the other hand, there is a possibility that water may infiltrate into the internal structure of the wiring body 3 from the other end of the pressure-resistant tube 32 . However, in this embodiment, the waterproof material 33 b is applied to the wiring body 3 , so that the electrical connector 4 can be configured compactly while imparting high waterproof performance to the wiring body 3 and even the acceleration sensor assembly 1 . Hereinafter, this point will be described together with an example of the assembly sequence.

(Electrical connector, assembly of the other end of the wiring body)

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

In addition, at this time, the cable housing 52 is in a state of being separated from the contact housing 51 , and is also in a state of being separated from the cable gland 55 . The outer casing 53 can be assembled with the contact casing 51, or it can be before assembly.

Next, as shown in FIG. 10 , the filling material 62 is filled in the base end side opening of the accommodation hole 54 . The filling material 62 is filled so as not to come into contact with the tip side of the housing hole 54 , especially the contact point 50 . The filler 62 is viscous such as silicone rubber, for example. Therefore, the work of filling the filling material 62 can be easily performed so that the filling material 62 does not leak out to the tip end portion of the accommodation hole 54 in which the contact 50 is accommodated. The other-end lead-out portion 39 (in particular, the covering material 35 b of the electric wire 35 constituting the other-end lead-out portion 39 ) is fixed to the inner peripheral surface of the housing hole 54 by the filling material 62 .

Next, as shown in FIG. 11 , the cable housing 52 is screwed to the contact housing 51 , while the cable gland 55 remains separated from the cable housing 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 so as to fill substantially the entire interior of the cable housing 52 . The other end of the surrounding material 36 is positioned inside the cable housing 52 . Therefore, the surrounding material 36 and the starting point of the other end lead-out portion 39 are fixed inside the inner peripheral surface of the cable housing 52 by the resin material 61 .

Next, as shown in FIG. 12 , the cable gland 55 is screwed to the cable housing 52 . Furthermore, the other end of the pressure-resistant tube 32 is fitted outside from one end of the multi-core cable 31 . With the other end of the pressure-resistant tube 32 facing the stepped surface of the cable gland 55, use the pipe clamp 37b to fasten the other end of the pressure-resistant tube 32 to the multi-core cable through the cable gland 55. Line 31.

Next, as shown in FIG. 13 , a seal is provided across the other end of the pressure-resistant tube 32 and the surface of the electrical connector 4 (in this embodiment, the outer peripheral surface of the internal thread portion 55a of the cable gland 55). Material 43. The sealing material 43 is provided over the entire circumference. Thereby, the gap between the other end of the pressure-resistant tube 32 and the cable gland 55 is sealed from the outside of both members 32 and 55 . Furthermore, 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. Thus, 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 33 b is provided so as to straddle the other end of the pressure-resistant tube 32 and the surface of the electrical connector 4 (in this embodiment, the outer peripheral surface of the cable gland 55 ). The waterproof material 33b has the same property as the said waterproof material 33a, and is provided similarly to the said waterproof material 33a. The waterproof material 33b is also wound around the pipe clip 37b. The waterproof material 33b is provided at the other end of the pressure-resistant tube 32 from the cable housing 52 to the center of the wiring body 3 closer to the place where the tube clamp 37b is provided.

Next, as shown in FIG. 3 , a heat-shrinkable tube 34 b is provided to surround the waterproof material 33 b from the outside, and the waterproof material 33 b is hidden by the heat-shrinkable tube 34 b. The heat-shrinkable tube 34b shrinks when heated, and is in close contact with the outer surface of the waterproof material 33b.

(effect)

In this way, the acceleration sensor assembly 1 according to the present embodiment includes the electrical connector 4 connected to the other end of the wiring body 3 , and the wiring body 3 is formed so as to straddle the outer surface of the pressure-resistant tube 32 and the surface of the electrical connector 4 . The waterproof material 33b is set in the form. Thus, water can be prevented from infiltrating from the gap between the pressure-resistant tube 32 and the electrical connector 4 , and the waterproof performance of the wiring body 3 and the electrical connector 4 can be improved.

The other end of the pressure-resistant tube 32 faces the surface of the electrical connector 4 . It is not necessary to fit the pressure-resistant tube 32 into the electrical connector 4, and the assemblability of the acceleration sensor assembly 1 is improved. Even if the pressure-resistant tube 32 is not embedded in the electrical connector 4, the waterproof performance can be achieved by the waterproof material 33b provided outside it. Accordingly, the electrical connector 4 can 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-resistant tube 32 and the surface of the electrical connector 4 . In this case, since the gap between the outer surface of the pressure-resistant tube 32 and the surface of the electrical connector 4 can be sealed with the sealing material 43 , the possibility of water seeping into the pressure-resistant tube 32 can be further reduced.

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

Thereby, even if the wiring body 3 is pulled strongly, the resin material 61 and the connector case 7 can cope with the tensile load, and the disconnection of the plurality of electric wires 35 can be prevented.

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 position of the plurality of electric wires 35 is relatively stable, and the connection state between the plurality of electric wires 35 and the contact point 50 can be maintained.

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

The embodiments have been described so far, but the above configurations can be modified, deleted, or added within the scope of the present invention.

Claims (4)

1. a kind of acceleration transducer assembly, which is characterized in that

Have：

Signal output device including generating the substrate for detecting signal of acceleration and the sensor housing of the receiving substrate；With And

What portion was connect with the wiring joint face of the substrate at one end matches wire body,

The sensor housing includes：

The housing body of tubular with backside openings portion；With

It is installed on the housing body and closed back cover is carried out to the backside openings portion,

The backside openings portion, which is formed as the substrate, to be passed through, the substrate with by the wiring joint face towards the back of the body The form of face opening portion is contained in the housing body, and the back cover has for the wiring insert with wire body insert Hole.

2. acceleration transducer assembly according to claim 1, which is characterized in that

It is described to include with wire body：

The electric wire being connect with the wiring joint face；With

The pressure pipe of the electric wire is surrounded from outside,

The electric wire is inserted through the wiring inserting hole, and it is bigger than the wiring inserting hole that the pressure pipe is formed as diameter.

3. acceleration transducer assembly according to claim 1, which is characterized in that

It is described to include with wire body：

More electric wires being connect with the wiring joint face；With

Collect and surround the encirclement material of the more electric wires,

In the one end with wire body, the more electric wires are exported to be formed from the packet from the encirclement material One end leading-out portion of material exposing is enclosed,

One end leading-out portion and the encirclement material are fixed on the back cover by resin material.

4. acceleration transducer assembly described in any one of claim 1 to 3, which is characterized in that

The signal output device is installed on the bogie of rail truck.