JP2018001781A - Railway vehicle electric component fixing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railway vehicular electric component fixing mechanism capable of effectively preventing an electrical contact failure or destruction of a railway vehicular electric component caused by vibrations.SOLUTION: This railway vehicular electric component fixing mechanism that fixes a railway vehicular electric component unit 22 inserted from a backside to be housed in a box body arranged in a railway vehicle to the box body is provided with, on the backside of the unit: a guide pin 34 which is arranged in parallel to the insertion direction of the unit with respect to the box body; and a guide pin receiver 35 which holds the tip of the unit housed in the box body and which is provided in the box body. The unit has a front side which is opposed to the backside fixed to the box body. The guide pin has a first male or female conical surface at a tip 34B. The guide pin receiver has a second make or female conical surface 35A similar in shape to the conical surface at the tip of the guide pin. The tip of the guide pin is held by bringing the second conical surface into contact with the first conical surface of the guide pin housed in the box body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fixing mechanism for electric equipment for railway vehicles, and in particular, is suitable for application to a fixing mechanism for fixing a unitized electric equipment for railway vehicles to a box that houses the electric equipment for railway vehicles. is there.

  2. Description of the Related Art Conventionally, in a railway vehicle, necessary electrical products are divided into units for each function, and a plurality of electrical product units are mounted so as to be housed in a box fixed to the lower side of the vehicle body. In this case, each unit is inserted into the box through a corresponding opening provided on the side of the box, and a front panel that is slightly larger than the opening of the box provided on the front of the unit It is fixed to the box by screwing around the opening.

  In this way, in a railway vehicle, each unit of electrical equipment is housed in a box in the state of a cantilever in which only the front panel portion is fixed to the box, and the rear end of the unit is the box. In contrast, it can vibrate vertically and horizontally. For this reason, in the conventional railway vehicle, the vibration mode of the cantilever of each unit is excited by the vibration when the vehicle travels, and there is a possibility that the unit may be damaged due to poor electrical contact or vibration of the unit.

  As one of the methods for solving such a problem, it is conceivable to employ, for example, the device fixing mechanism disclosed in Patent Document 1 as a fixing mechanism for an electrical unit in a railway vehicle.

JP 2008-4759 A

  However, according to the device fixing mechanism disclosed in Patent Document 1, the earthquake resistance is still insufficient, and even if such a device fixing mechanism is used as a mechanism for fixing a unit to a box in a railway vehicle, There is a problem that the vibration mode of the cantilever cannot be sufficiently suppressed.

  The present invention has been made in consideration of the above points. The vibration mode of the cantilever beam of a railway vehicle electrical product is sufficiently suppressed in practice, and the electrical contact failure of the railway vehicle electrical product caused by vibration is caused. It is intended to propose a mechanism for fixing electrical equipment for railway vehicles that can effectively prevent damage.

  In order to solve such a problem, in the present invention, a railcar electric unit for fixing a railcar electrical unit stored in a box disposed in a railcar so as to be inserted from the back side is fixed to the box. In the electrical component fixing mechanism, on the back side of the unit, guide pins arranged in parallel to the insertion direction of the unit with respect to the box, and the unit provided in the box and housed in the box A guide pin receiver for holding the tip of the guide pin is provided, and the unit has a front surface facing the back surface fixed to the box, and the guide pin has a male or female first cone at the tip. The guide pin receiver has a female or male second conical surface having the same shape as the conical surface at the tip of the guide pin, the second conical surface, and the box body. The guide pin housed in And to hold the tip of the guide pin so as to abut with said first conical surfaces.

  According to the railway vehicle electrical component fixing mechanism, the vibration mode of the unitized cantilever beam of the rail vehicle electrical component can be practically sufficiently suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical contact failure and damage of the electrical equipment for rail vehicles resulting from a vibration can be prevented effectively.

It is a rough-line perspective view which shows a partial structure of the railway vehicle which employ | adopted the fixing mechanism of the electrical equipment for railway vehicles by 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS (A)-(D) is a side view which shows the structure of the fixing mechanism of the electrical equipment for rail vehicles by 1st Embodiment, taking a partial cross section. (A)-(D) are side views which show the structure of the fixing mechanism of the electrical equipment for rail vehicles by 2nd Embodiment, taking a partial cross section. (A) is a front view used for description of a conventionally proposed device fixing mechanism, and (B) is a side view used for description of the device fixing mechanism.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Conventional Device Fixing Mechanism First, the device fixing mechanism disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2008-4759) described above will be described with reference to FIG. To do.

  As shown in FIGS. 4A and 4B, in the device fixing mechanism 1 disclosed in Patent Document 1, the guide pin 3 is disposed on the back surface of the unit 2 of the wireless device, and the unit 2 is accommodated. A guide pin receiving spring 4 provided with a receiving hole 4A and a curved portion 4B is disposed on the box (not shown) side. The guide pin receiving spring 4 is formed of an elastic plate material and is fixed to a guide member 5 disposed in the box.

  When the unit 2 is inserted into the box, the guide pin 3 enters the receiving hole 4A of the guide pin receiving spring 4 and the guide pin receiving spring 4 is inserted in the insertion direction of the unit 2 by the large diameter portion 3A formed in the guide pin 3. The guide pin 3 is pushed and elastically deformed, and the guide pin 3 is pushed in one direction by the guide pin receiving spring 4 (the direction opposite to the insertion direction of the unit 2), and the guide pin 3 and the guide pin receiving spring 4 are free to play. Seismic resistance can be obtained by engaging with no gap.

  However, according to the device fixing mechanism 1 as described above, the guide pin 3 engages with the upper portion of the receiving hole 4A of the guide pin receiving spring 4 without any gap as shown in FIG. And a gap below the receiving hole 4A of the guide pin receiving spring 4 exists.

  For this reason, when the unit 2 is in the state of a cantilever in which only the front side is fixed to the box, a guide is required to suppress the vertical vibration mode of the rear end of the unit 2. Although it is necessary to increase the rigidity of the pin receiving spring 4, if this rigidity is increased, sufficient elastic deformation of the guide pin receiving spring 4 when pushed in the insertion direction of the unit 2 by the large diameter portion 3 </ b> A of the guide pin 3. There is a problem that cannot be obtained.

  That is, when the rigidity of the guide pin receiving spring 4 is increased, there is a problem that a gap is generated between the guide pin 3 and the receiving hole 4A of the guide pin receiving spring 4 to deteriorate the earthquake resistance. On the other hand, if the rigidity of the guide pin receiving spring 4 is lowered, the vibration mode of the cantilever beam in the vertical and horizontal directions cannot be suppressed.

  Therefore, the electrical component fixing mechanism according to the present embodiment is capable of solving such problems and sufficiently suppressing the vibration mode of the cantilever beams in the vertical and horizontal directions of the unit for electrical components for railway vehicles. It is a thing. Hereinafter, the railway vehicle electrical component fixing mechanism of this embodiment will be described.

(1-2) Fixing Mechanism for Railway Vehicle Electricity According to this Embodiment In FIG. 1, reference numeral 20 denotes an electric appliance for a railway vehicle as a whole according to this embodiment (hereinafter referred to as railcar electric equipment). (Referred to as a product). The fixing mechanism 20 is parallel to the longitudinal direction of the railway vehicle (the forward direction indicated by the arrow x in FIG. 1 and the backward direction opposite to this, which is hereinafter referred to as the front-rear direction). This is a mechanism for fixing the railway vehicle electrical unit 22 housed in the box 21 disposed in the box 21 to the box 21.

  The unit 22 is formed in a rectangular parallelepiped shape as a whole, and a front panel 22A formed to be slightly larger than other portions is provided on the front surface portion thereof. In addition, through holes 22B are formed in the four corners of the front panel 22A.

  Further, the box body 21 is formed in a rectangular parallelepiped shape having a size capable of accommodating a plurality of units 22, and the inside thereof has a central partition plate 30 provided in parallel with the front-rear direction, the central partition plate 30, The plurality of partition plates 31 provided vertically are divided into a plurality of space regions 21 </ b> A for housing the units 22. In this case, the central partition plate 30 is formed using a flexible material such as metal or wood.

  On the left and right side surfaces of the box 21, the height of the unit 22 accommodated in the space region 21A corresponding to the space region 21A (the upward direction indicated by the arrow z in FIG. A rectangular opening 21B having a height and a width that are slightly larger than the length in the downward direction and the width (the length in the front-rear direction in FIG. 1) is provided. As a result, the corresponding unit 22 can be accommodated so as to be inserted into the corresponding space region 21 </ b> A of the box body 21 through the opening 21 </ b> B.

  In each space area 21A of the box 21, a pair of L-shaped guide rails 32A and 32B for guiding the insertion direction of the unit 22 with respect to the space area 21A are provided. It is fixed on the bottom surface 21 </ b> C of the box body 21 in parallel with the insertion direction (the right direction indicated by the arrow y in FIG. 1 or the left direction opposite thereto) and at substantially the same distance as the lateral width of the unit 22.

  Furthermore, a total of four screw holes 21 </ b> D are provided around each opening 21 </ b> B provided on each of the left and right side surfaces of the box 21 so as to correspond to the respective through holes 22 </ b> B provided on the front panel 22 </ b> A of the corresponding unit 22. Thus, after the unit 22 is inserted into the box body 21 through the corresponding opening 21B of the box body 21, the unit fixing screw 33 is inserted into the box body 21 through each of the through holes 22B. Are screwed into the corresponding screw holes 21D, so that only the front side of the unit 22 can be housed in the box body 21 in a state of a cantilever beam fixed to the box body 21. .

  In addition to this configuration, in the case of the present embodiment, two guide pins 34 are welded or splashed on the back surface of each unit 22 facing the front panel 22A in parallel with the insertion direction of the unit 22 with respect to the box body 21. Alternatively, it is fixed at a predetermined position using a ring washer. In addition, in each space region 21A of the box body 21, two guide pin receivers 35 are respectively welded to the central partition plate 30 at positions facing the respective guide pins 34, corresponding to the respective guide pins 34 of the unit 22. It is fixed using a spring or ring washer.

  In this case, as shown in FIG. 2A, each guide pin 34 has a structure in which a conical tip portion 34B is integrally formed at the tip of a cylindrical base portion 34A, and each guide pin receiver 34 35 has a structure in which a conical recess 35A having the same shape as the tip shape of the tip portion 34B of the guide pin 34 is formed in the center portion of the tip surface of each cylinder.

  As a result, as shown in FIG. 2C, when the unit 22 is stored (inserted) in the corresponding space region 21A of the box 21, the center axis K1 of the guide pin 34 of the unit 22 is on the box 21 side. The tip of the tip 34B of the guide pin 34 fits into the recess 35A of the guide pin receiver 35 so as to coincide with the central axis K2 of the corresponding guide pin receiver 35.

  For example, as shown in FIG. 2B, the center axis K1 of the guide pin 34 of the unit 22 is shifted from the center axis K2 of the corresponding guide pin receiver 35 on the box body 21 side (in FIG. 2B). Even if the center axis K1 of the guide pin 34 of the unit 22 is shifted by the distance dx ′ from the center axis K2 of the guide pin receiver 35), the tip of the tip portion 34B of the guide pin 34 is When fitting into the recess 35A, the peripheral surface of the tip end 34B of the guide pin 34 slides on the inner peripheral surface of the corresponding recess 35A of the guide pin receiver 35, so that the position of the guide pin 34 is corrected. Finally, as shown in FIG. 2C, the tip of the tip 34B of the guide pin 34 fits into the recess 35A of the guide pin receiver 35 in a state where the center axes K1 and K2 coincide with each other.

  Then, the guide pin 34 and the guide pin receiver 35 are inserted into the recess 35A of the guide pin receiver 35 by fitting the tip of the tip part 34B of the guide pin 34 in a state where the center axes K1 and K2 of the guide pin receiver 35 coincide with each other. The entire peripheral surface (a male conical surface, hereinafter referred to as a male conical surface) of the distal end portion 34B of the guide pin 34 fitted into the concave portion 35A of the 35 is formed in the concave portion 35A of the guide pin receiver 35. The guide pin 34 (and thus the unit 22) is moved up and down and left and right by the guide pin receiver 35 in order to abut on the inner peripheral surface (a female conical surface, hereinafter referred to as a female conical surface) without play. So that it cannot vibrate.

  In the case of the present embodiment, the shape and size of the guide pin 34 and the guide pin receiver 35 and the depth of the space region 21A in the box 21 are as shown in FIG. The length L1 of the guide pin 34 and the guide pin receiver 35 as a whole when the tip of 34B is completely fitted in the recess 35A of the guide pin receiver 35 is determined when the guide pin 34 and the guide pin receiver 35 are not provided. The distance between the rear surface of the unit 22 in which the front panel 22A is screwed to the box 21 and the surface of the central partition plate 30 facing the unit 22 is slightly larger (dy in FIG. 2C). Selected.

  As a result, the unit 22 is inserted into the corresponding space region 21A of the box 21 and the front panel 22A of the unit 22 is screwed to the box 21 (that is, the unit 22 is stored in the box 21). The unit 22 presses the central partition plate 30 in the insertion direction of the unit 22 via the guide pins 34 and the guide pin receivers 35, and the central partition plate 30 can be elastically deformed by the pressing force.

  Then, by elastically deforming the central partition plate 30 in this way, the central partition plate 30 pushes the guide pin receiver 35 in the direction opposite to the insertion direction of the unit 22 by the elastic force, and the male conical surface of the guide pin 34 The guide pin 34 and the guide pin receiver 35 can be engaged with each other in a state where there is no play by pressing the female conical surface of the guide pin receiver 35.

  Further, by elastically deforming the central partition plate 30 in this manner, the unit 22 is pushed out of the box body 21 in the direction opposite to the insertion direction only by removing the unit fixing screw 33 (FIG. 1). As a result, not only the unit 22 can be easily detached from the box body 21 but also the central partition plate 30 places the guide pin receiver 35 in the direction opposite to the insertion direction of the unit 22 in a state where the unit 22 is housed in the box body 21. When the spring washer is used to apply the urging force to the unit fixing screw 33 in the same direction, the loosening of the unit fixing screw 33 due to vibration can be suppressed.

(1-3) Effects of the Present Embodiment As described above, in the present embodiment, the guide pin 34 having the male conical surface at the distal end portion 34B is disposed on the back surface of the unit 22 and corresponds to the guide pin 34. The guide pin receiver 35 provided with the recess 35A having the female conical surface of the same shape as the male conical surface of the guide pin 34 is arranged on the central partition plate 30 in the box 21. The female conical surface of the guide pin receiver 35 and the male conical surface of the guide pin 34 are brought into contact without play, and the guide pin 34 (and thus the unit 22) is vibrated in the vertical and horizontal directions by the guide pin receiver 35. It can be held so that it cannot.

  Therefore, according to the railway vehicle electrical component fixing mechanism of the present embodiment, the vibration mode of the cantilever of the unit 22 in which the front panel 22A is fixed to the box body 21 can be sufficiently suppressed in practice. Thus, it is possible to effectively prevent poor electrical contact and breakage of the unit 22 due to vibration.

(2) Second Embodiment FIG. 3A shows the configuration of a railway vehicle electrical component fixing mechanism according to a second embodiment. In the fixing mechanism of the present embodiment, the guide pin receiver 35 (FIG. 1) as a component is not provided in each space region 21A (FIG. 1) of the box 21 (FIG. 1), and the central partition plate 40 The point that the guide pin receiver 40A is formed by drilling is greatly different from the fixing mechanism 1 of the first embodiment.

  In practice, the guide pin receiver 40A according to the present embodiment is arranged at a predetermined position of the central partition plate 40 facing each guide pin 34 of the unit 22 housed in the box 21, and the distal end portion 34B of the guide pin 34 is respectively provided. Is formed by burring a hole having a female conical surface having the same shape as that of the tip. For this reason, in the present embodiment, the central partition plate 40 is formed using a material capable of performing a burring process such as an iron material, an aluminum material, or a stainless material.

  Thus, as shown in FIG. 3C, when the unit 22 is stored (inserted) in the corresponding space region 21A of the box 21, the central axis K1 of the guide pin 34 of the unit 22 is on the box 21 side. The tip of the tip 34B of the guide pin 34 is fitted into the guide pin receiver 40A so as to coincide with the center axis K3 of the corresponding guide pin receiver 40A.

  For example, as shown in FIG. 3B, the center axis K1 of the guide pin 34 of the unit 22 is shifted from the center axis K3 of the corresponding guide pin receiver 40A on the box body 21 side (in FIG. 3B). Even if the center axis K1 of the guide pin 34 of the unit 22 is shifted by a distance dx ′ from the center axis K3 of the guide pin receiver 40A), the tip of the tip end portion 34B of the guide pin 34 is connected to the guide pin receiver 40A. At the time of fitting, the peripheral surface of the distal end portion 34B of the guide pin 34 slides on the inner peripheral surface of the corresponding guide pin receiver 40A and the position of the guide pin 34 is corrected. As shown in (C), the tip of the tip 34B of the guide pin 34 is fitted into the guide pin receiver 40A so that the center axes K1 and K3 coincide with each other.

  Then, the distal end of the distal end portion 34B of the guide pin 34 is fitted into the guide pin receiver 40A in such a state that the center axes K1 and K3 of the guide pin 34 and the guide pin receiver 40A coincide with each other. Since the entire peripheral surface (male conical surface) of the distal end portion 34B of the inserted guide pin 34 contacts the inner peripheral surface (female conical surface) of the guide pin receiver 40A without play, the guide pin receiver 40A guides the guide pin 34. The pin 34 (and thus the unit 22) can be held so as not to vibrate in the vertical direction and the horizontal direction.

  In the case of the present embodiment, the shape and size of the guide pin 34 and the guide pin receiver 40A and the depth of the space region 21A in the box 21 are as shown in FIG. When the distance L2 from the root of these guide pins 34 to the central partition plate 40 in the state where the tip of 34B is completely fitted in the guide pin receiver 40A is the case where there is no guide pin 34, the front panel 22A is mounted on the box 21. It is selected to be slightly larger than the distance from the back surface of the unit 22 screwed to the central partition plate 30 (dy ′ in FIG. 3C).

  As a result, the unit 22 is inserted into the corresponding space region 21A of the box 21 and the front panel 22A of the unit 22 is screwed to the box 21 (that is, the unit 22 is stored in the box 21). The unit 22 presses the central partition plate 40 in the insertion direction of the unit 22 through the guide pins 34 and the guide pin receivers 40A, and the central partition plate 40 can be elastically deformed by the pressing force.

  Then, by elastically deforming the central partition plate 40 in this way, the central partition plate 40 pushes the guide pin 34 in the direction opposite to the insertion direction of the unit 22 by the elastic force, so that the male cone of the guide pin 34 is obtained. The surface and the female conical surface of the guide pin receiver 40A can be brought into pressure contact with each other, so that the guide pin 34 and the guide pin receiver 40A can be engaged with each other without any play.

  Further, by selecting the shape and size of the guide pin 34 and the guide pin receiver 40A in this way, the unit 22 can be removed from the box 21 in the direction opposite to the insertion direction simply by removing the unit fixing screw 33 (FIG. 1). Since it is pushed out, not only the unit 22 can be easily detached from the box 21 but also the loosening of the unit fixing screw 33 caused by vibration can be suppressed, as in the first embodiment. it can.

  As described above, in the present embodiment, the guide pin 34 having the male conical surface at the distal end portion 34B is disposed on the back surface of the unit 22, and the male cone of the guide pin 34 is associated with the guide pin 34. Since the hole-shaped guide pin receiver 40A having a female conical surface having the same shape as the surface is formed in the central partition plate 40, the front panel 22A is attached to the box body 21 as in the first embodiment. The vibration mode of the cantilever beam of the fixed unit 22 can be sufficiently suppressed in practical use, and thus the electrical contact failure and breakage of the unit 22 due to vibration can be effectively prevented.

  Further, according to the present embodiment, the number of parts as the whole fixing mechanism can be reduced and the fixing mechanism as a whole can be reduced because the guide pin receiver 35 (FIG. 1) of the first embodiment is not required. The thickness in the left-right direction in FIG. 1 can be reduced, and accordingly, the thickness of the box body 21 in the width direction (left-right direction in FIG. 1) is reduced, or conversely, the insertion direction of the unit 22 into the box body 21 ( The length in the left-right direction in FIG. 1 can be increased.

(3) Other Embodiments In the first embodiment described above, a male conical surface is formed at the tip of the guide pin 34, and a female conical surface having the same shape as the guide pin receiver 35 is formed. However, the present invention is not limited to this, and a female conical surface is formed at the tip of the guide pin 34, and a male conical surface having the same shape as the guide pin receiver 35 is formed. May be formed.

  In the first and second embodiments described above, the guide pin receiver 35 is fixed to the central partition plate 30 or the guide pin receiver 40A is formed on the central partition plate 40. The present invention is not limited to this, and these guide pin receivers 35, 40A may be fixed to or formed on some elastic member provided in the box 21 separately from the central partition plates 30, 40.

  The present invention can be applied to a railway vehicle.

  20... Railway car electrical fixing mechanism 21. Box body 21 A. Spatial region 21 B. Opening part 21 D. Screw hole 22 22 Unit 22 A Front panel 22 B Through hole, 30, 40 ... center partition plate, 31 ... partition plate, 32A, 32B ... guide rail, 33 ... unit fixing screw, 34 ... guide pin, 34B ... tip, 35, 40A ... ... Guide pin holder, 35A ... Recess.

Claims (6)

In the rail car electrical equipment fixing mechanism for fixing the rail car electrical equipment unit stored in the box disposed in the rail car so as to be inserted from the back side to the box,
On the back side of the unit, guide pins arranged in parallel with the insertion direction of the unit with respect to the box,
A guide pin receiver provided in the box and holding a tip of the guide pin of the unit housed in the box;
The unit has a front side facing the back side fixed to the box,
The guide pin has a male or female first conical surface at a tip,
The guide pin receiver is
The guide pin has a female or male second conical surface having the same shape as the conical surface at the tip of the guide pin, and the second conical surface and the first of the guide pin housed in the box. A mechanism for fixing an electric component for a railway vehicle, wherein the tip of the guide pin is held so as to abut against the conical surface of the rail. The guide pin receiver is
When the unit is housed in the box, the unit is fixed to an elastic member that is elastically deformed in the insertion direction of the unit into the box by a pressing force applied from the unit via the guide pin and the guide pin receiver. The mechanism for fixing electrical equipment for railway vehicles according to claim 1, wherein: The elastic member is
The rail vehicle electric component fixing mechanism according to claim 2, wherein the box is a partition plate that divides the box into a plurality of space regions into which the units are inserted. The guide pin has the male first conical surface at the tip,
The guide pin receiver is a hole having a female second conical surface having the same shape as the first conical surface formed in an elastic member fixedly disposed in the box. Item 2. A fixing mechanism for electrical equipment for railway vehicles according to Item 1. The elastic member is
When the unit is housed in the box, the unit is elastically deformed in the insertion direction of the unit into the box by a pressing force applied from the unit via the guide pin and the guide pin receiver. The fixing mechanism for electrical equipment for railway vehicles according to claim 4. The elastic member is
The rail vehicle electric component fixing mechanism according to claim 5, wherein the box is a partition plate that divides the box into a plurality of space regions into which the unit is inserted.

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