WO2023181760A1 - Cylindrical laminated rubber and axle box support device for railway vehicle - Google Patents

Abstract

[Problem] To eliminate deformation and abutment position displacement of a restriction member that prevents large displacement. [Solution] A cylindrical laminated rubber part 1 comprises: an inner tube 2; an outer tube 3 disposed coaxially on the outside of the inner tube 2; a laminated section 4 which is provided between the inner tube 2 and the outer tube 3 and is formed by alternately laminating, in the radial direction of the outer tube 3, rubber parts 5A to 5C and support plates 6A, 6B; and gaps 7 formed in the radial direction between the inner tube 2 and the outer tube 3; and is provided with inner restriction members 10 each secured to the inner tube 2 inside the gap 7 and extending radially toward the outer tube 3, and outer restriction members 20 each secured to the outer tube 3 inside the gap 7 and extending radially toward the inner tube 2. The inner restriction member 10 and the outer restriction member 20 face each other in the radial direction across the gap such that an inner facing surface 14a and an outer facing surface 24a thereof abut against each other as the laminated section 4 deforms.

Description

Cylindrical laminated rubber and railcar axle box support device

The present disclosure relates to a cylindrical laminated rubber provided in an axle box support device for a railway vehicle, and an axle box support device for a railway vehicle using the cylindrical laminated rubber.

An axle box support device for a railway vehicle is provided to elastically support a bogie frame with respect to a wheel axle. This axle box support device has a coil spring that mainly receives loads in the vertical direction and a cylindrical laminated rubber that receives loads mainly in the horizontal direction between the axle box body that supports the wheel axle and the bogie frame above it. It will be placed.
For example, as disclosed in Patent Documents 1 and 2, the cylindrical laminated rubber has rubber and metal plates arranged alternately in the radial direction between a metal inner cylinder and an outer cylinder coaxially arranged with the inner cylinder. It has a structure in which a pair of laminated parts are interposed. A pair of gaps are formed between the laminated parts in the circumferential direction, and a stopper such as a rubber or pin is fixed to either one of the inner cylinder and the outer cylinder and extends radially to the other side. (regulating member) is provided. The stopper prevents large displacement of the cylindrical laminated rubber by coming into contact with the other side when the axle box body undergoes a large relative displacement with respect to the bogie frame.

Japanese Patent Application Publication No. 2008-247229 Japanese Patent Application Publication No. 2012-77799

In the conventional cylindrical laminated rubber described above, the regulating member is provided only on either the inner cylinder side or the outer cylinder side, so the regulating member becomes longer in the radial direction. Therefore, there is a possibility that the regulating member may be deformed (buckled) or that the position of contact with the other side may be misaligned.

Therefore, an object of the present disclosure is to provide a cylindrical laminated rubber and an axle box support device for a railway vehicle that prevent large displacement and do not cause deformation of the regulating member or shift of the contact position.

In order to achieve the above object, a first configuration of the present disclosure includes an inner cylinder, an outer cylinder coaxially arranged outside the inner cylinder, and an elastic A cylindrical laminated rubber comprising: a laminated portion formed by alternately laminating members and supporting members in the radial direction of the outer cylinder; and a gap portion formed in the radial direction between the inner cylinder and the outer cylinder. And,
an inner regulating member fixed to the inner cylinder within the cavity and extending in the radial direction toward the outer cylinder;
an outer regulating member fixed to the outer cylinder within the cavity and extending in the radial direction toward the inner cylinder,
The inner regulating member and the outer regulating member are opposed to each other in the radial direction with a gap therebetween, and their opposing surfaces can come into contact with each other as the laminated portion deforms. .
Another aspect of the present disclosure is that in the above configuration, each of the opposing surfaces has a different area.
Another aspect of the present disclosure is that in the above configuration, the opposing surface of the inner regulating member has a larger area than the opposing surface of the outer regulating member.
Another aspect of the present disclosure is that in the above configuration, the opposing surface of the inner regulating member is longer than the opposing surface of the outer regulating member in the axial direction of the outer cylinder.
Another aspect of the present disclosure is that in the above structure, each of the opposing surfaces is 1/3 to 1/3 of the radial distance from the inner cylinder to the outer cylinder when the laminated parts are deformed and abutted against each other. It is characterized by being located at the 2/3 position.
Another aspect of the present disclosure is characterized in that in the above configuration, each of the opposing surfaces is a plane parallel to each other.
Another aspect of the present disclosure is that in the above configuration, the inner regulating member and the outer regulating member include a core material and a covered elastic member that covers at least the opposing surface side of the core material to form the opposing surface. It is characterized by consisting of.
Another aspect of the present disclosure is that in the above structure, the core material is made of a harder material than the covering elastic member.
Another aspect of the present disclosure is that in the above configuration, the inner cylinder facing surface of the core material of the inner regulating member is a curved surface concentric with the inner cylinder,
A surface of the core material of the outer regulating member that faces the outer cylinder is a bulged surface that is concentric with the outer cylinder.
Another aspect of the present disclosure is that in the above configuration, the covering elastic member of the inner regulating member is connected to the elastic member of the laminated portion at an outer peripheral surface of the inner cylinder,
The covering elastic member of the outer regulating member is connected to the elastic member of the laminated portion at an inner circumferential surface of the outer cylinder.
Another aspect of the present disclosure is that in the above structure, the covering elastic member of the inner regulating member is also interposed between the inner cylinder and the core material, and the covering elastic member of the outer regulating member is also interposed between the outer cylinder and the core material,
The thickness of each of the covering elastic members on each of the opposing surfaces is the thickness of the covering elastic member between the inner cylinder and the core material, and the thickness of the covering elastic member between the outer cylinder and the core material. The thickness is less than or equal to
Each of the covering elastic members on each of the opposing surfaces in contact with each other, and each of the covering elastic members between the inner cylinder and the core material and between the outer cylinder and the core material, It is characterized in that the compressive strain in the radial direction is provided so as to be substantially the same.
This "substantially the same" means that some errors are allowed, including the case where the rubber distortion is the same.
Another aspect of the present disclosure is that in the above configuration, in the axial direction of the inner cylinder, the length of the portion of the laminated portion that abuts the elastic member with the outer circumferential surface of the inner cylinder and the length of the inner regulating member are , the length of the inner cylinder is less than or equal to the length of the inner cylinder, and the length of the inner regulating member is less than or equal to the length of the portion of the laminated portion where the elastic member contacts the outer peripheral surface of the inner cylinder. ,
In the axial direction of the outer cylinder, the length of the portion of the laminated portion where the elastic member contacts the inner circumferential surface of the outer cylinder and the length of the outer regulating member are equal to or less than the length of the outer cylinder. In addition, the length of the outer regulating member is less than or equal to the length of a portion of the laminated portion where the elastic member contacts the inner circumferential surface of the outer cylinder.
In order to achieve the above object, a second configuration of the present disclosure includes a coil spring and a cylinder according to any one of the first configurations, between an axle box that supports a wheel axle and a bogie frame above the axle box. It is characterized by the arrangement of laminated rubber.

According to the present disclosure, the regulating member that suppresses large displacement is divided into two parts, an inner regulating member and an outer regulating member, so that each member becomes shorter in the radial direction. Therefore, deformation (buckling) of the inner regulating member and outer regulating member and occurrence of a shift in the abutting positions between the two regulating members are suppressed. Further, the degree of freedom in designing both regulating members (structure, strength, material) is also increased.
According to another aspect of the present disclosure, in addition to the above effects, since the areas of the opposing surfaces are different from each other, deviations in the contact position can be tolerated, and a constant contact area can be maintained even during deformation. .
According to another aspect of the present disclosure, in addition to the above effects, the opposing surfaces of the inner regulating member have a larger area than the opposing surfaces of the outer regulating member. It can be absorbed by
According to another aspect of the present disclosure, in addition to the above effects, the opposing surface of the inner regulating member is longer than the opposing surface of the outer regulating member in the axial direction of the outer cylinder, so that relative displacement in the axial direction is prevented. Can be covered effectively.
According to another aspect of the present disclosure, in addition to the above effects, when the laminated portions deform and come into contact with each other, each of the opposing surfaces is 1/3 to 2 of the radial distance from the inner cylinder to the outer cylinder. Since it is located at the position of /3, if both regulating members are formed to have the same length in the radial direction, they can have the same strength. Moreover, even if the lengths in the radial direction of both regulating members are different, it becomes easy to adjust the shape and material of each to make them have the same strength.
According to another aspect of the present disclosure, in addition to the above effects, since the opposing surfaces are planes parallel to each other, surface contact is facilitated even if the relative positions of both regulating members change.
According to another aspect of the present disclosure, in addition to the above effects, since the inner regulating member and the outer regulating member are composed of a core material and a covering elastic member, a shock buffering effect can be obtained at the initial stage of contact between both regulating members. Even if a deviation occurs in the mutual contact angles, it can be absorbed by the covered elastic member. Further, both the regulating members, the inner tube, and the outer tube can be vulcanized and bonded via the covering elastic member.
According to another aspect of the present disclosure, in addition to the above effects, since the core material is made of a harder material than the covering elastic member, the strength of both regulating members can be maintained.
According to another aspect of the present disclosure, in addition to the above effects, the inner cylinder facing surface of the core material of the inner regulating member is a curved surface, and the outer cylinder facing surface of the outer regulating member core material is a bulged surface. Therefore, both regulating members can be easily fixed to the inner cylinder and the outer cylinder. Furthermore, since the impact when the opposing surfaces abut each other is transmitted equally to the inner cylinder and the outer cylinder, damage to both regulating members due to stress concentration is suppressed.
According to another aspect of the present disclosure, in addition to the above-mentioned effects, since each covering elastic member of the inner regulating member and the outer regulating member is connected to the elastic member of the laminated portion, both regulating members can be easily molded. This also helps prevent peeling of the covered elastic member.
According to another aspect of the present disclosure, in addition to the above effects, the thickness of each covering elastic member on each opposing surface is the same as the thickness of the covering elastic member between the inner cylinder and the core material and the thickness of the covering elastic member between the inner cylinder and the core material. The thickness is less than the thickness of the covering elastic member between the inner cylinder and the core material, and between the inner cylinder and the core material and the outer cylinder and the core material when they are in contact with each other. The covering elastic members in between are provided so that the compressive strain in the radial direction is approximately the same, so it is possible to suppress deformation and damage due to stress concentration on low-rigidity parts when both regulating members come into contact. becomes.
According to another aspect of the present disclosure, in addition to the above effects, the innermost elastic member and the inner regulating member of the laminated portion have the same length as the inner cylinder or are shorter than the inner cylinder, and the outermost elastic member and the outer regulating member Since the member has the same length as the outer cylinder or is shorter than the outer cylinder, damage to the elastic member and both regulating members is suppressed. In addition, since the lengths of both regulating members are equal to or less than the length of the elastic member, both regulating members do not inhibit deformation of the laminated portion in the axial direction.

It is a top view of cylindrical laminated rubber. It is a front view of a cylindrical laminated rubber. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. 2 is a sectional view taken along line BB in FIG. 1. FIG. 3 is a sectional view taken along line CC in FIG. 2. FIG.

Embodiments of the present disclosure will be described below based on the drawings.
FIG. 1 is a plan view showing an example of cylindrical laminated rubber. FIG. 2 is a front view of the cylindrical laminated rubber. 3 is a sectional view taken along line AA in FIG. 1, and FIG. 4 is a sectional view taken along line BB. For convenience, the upper side of FIG. 1 is defined as the front, and the upper side of FIG. 2 is defined as the upper side, and the front, rear, left, right, and vertical directions are defined.
The cylindrical laminated rubber 1 includes an inner cylinder 2 located at the center and circular in plan view, and an outer cylinder 3 coaxially arranged outside the inner cylinder 2 and circular in plan view. The length L1 of the inner cylinder 2 in the vertical direction (axial direction) is longer than the length L2 of the outer cylinder 3 in the vertical direction. The outer cylinder 3 is disposed approximately at the midpoint of the length of the inner cylinder 2 in the vertical direction.

A pair of laminated parts 4, 4 are provided between the inner cylinder 2 and the outer cylinder 3. Each laminated portion 4 is made by laminating rubber 5A, 5B, 5C and support plates 6A, 6B alternately in the radial direction of the outer cylinder 3 from the inner cylinder 2 side, so that the rubber 5A, 5B, 5C has a concentric arc shape with the inner cylinder 2 in plan view. Become. Rubbers 5A to 5C are vulcanized and bonded to support plates 6A and 6B. The innermost rubber 5A is vulcanized and bonded to the outer circumferential surface of the inner tube 2, and the outermost rubber 5C is vulcanized and bonded to the inner circumferential surface of the outer tube 3. The support plates 6A and 6B are shorter in vertical length than the inner cylinder 2 and longer than the outer cylinder 3, but the inner support plate 6A is longer than the outer support plate 6B. Among the rubbers 5A to 5C, the innermost rubber 5A is the longest in the vertical direction, and the rubbers 5B and 5C are shortest in that order.
The laminated parts 4, 4 are fan-shaped in plan view and are arranged at point-symmetrical positions on the left and right with the inner cylinder 2 as the center. Therefore, between the inner cylinder 2 and the outer cylinder 3 and between the laminated parts 4, 4, a pair of void parts 7, 7 are formed symmetrically in the front and back with the inner cylinder 2 as the center.

Inside each gap 7, an inner regulating member 10 and an outer regulating member 20 are provided, respectively.
The inner regulating member 10 includes an inner core material 11 and a covering rubber 12 that covers the outer surface of the inner core material 11. As shown in FIGS. 3 and 5, the inner core material 11 has a rectangular shape in plan view and a prismatic shape extending in the vertical direction. The radially inner outer surface of the inner core material 11 is a curved surface 11a that is concentric with the outer peripheral surface of the opposing inner cylinder 2. The radially outer outer surface of the inner core material 11 is a plane 11b defined in the vertical and horizontal directions.
The covering rubber 12 is vulcanized and bonded to the inner core material 11 so as to cover the front, rear, left, and right outer surfaces of the inner core material 11 except for the upper and lower end surfaces of the inner core material 11. In the covering rubber 12 , an inner covering portion 13 located radially inward of the inner core material 11 is vulcanized and bonded to the outer peripheral surface of the inner cylinder 2 . Therefore, the inner regulating member 10 is supported in a state in which it protrudes radially outward from the inner cylinder 2. The inner covering part 13 is connected to the innermost rubber 5A, 5A of each laminated part 4 at the outer peripheral surface of the inner cylinder 2.
In the covering rubber 12, the outer surface of the outer covering portion 14 located on the radially outer side of the inner core material 11 is an inner facing surface 14a parallel to the plane 11b of the inner core material 11.

The outer regulating member 20 includes an outer core material 21 and a covering rubber 22 that covers the outer surface of the outer core material 21. As shown in FIGS. 3 and 5, the outer core material 21 has a rectangular shape in plan view and a prismatic shape extending in the vertical direction. A radially outer outer surface of the outer core member 21 is a bulged surface 21a that is concentric with the outer circumferential surface of the opposing outer cylinder 3. The radially inner outer surface of the outer core material 21 is a plane 21b defined in the vertical and horizontal directions.
The covering rubber 22 is bonded to the outer core material 21 in such a manner as to cover the outer surfaces of the outer core material 21 on the front, rear, right and left sides, except for the upper and lower end surfaces of the outer core material 21. In the covering rubber 22 , an inner covering portion 23 located on the radially outer side of the outer core material 21 is vulcanized and bonded to the inner circumferential surface of the outer cylinder 3 . Therefore, the outer regulating member 20 is supported while protruding radially inward from the outer cylinder 3.
In the covering rubber 22, the outer surface of the outer covering portion 24 located on the radially inner side of the outer core material 21 is an outer facing surface 24a parallel to the plane 21b of the outer core material 21. Therefore, the inner facing surface 14a of the outer covering part 14 of the inner regulating member 10 and the outer facing surface 24a of the outer covering part 24 of the outer regulating member 20 are parallel to each other.
The inner covering portion 23 is connected to the outermost rubber 5C, 5C of the laminated portion 4 via thin rubber 25, 25 bonded to the inner circumferential surface of the outer cylinder 3.

Both the left and right widths of the inner regulating member 10 and the outer regulating member 20 are the same, but the length in the vertical direction is equal to the length of the inner regulating member 10 (L3 shown in FIG. 3: defined by the inner core material 11). The length of the outer regulating member 20 is longer than the length of the outer regulating member 20 (L4 shown in FIG. 3: the actual length defined by the outer core material 21). The inner core material 11 and the outer core material 21 also have the same horizontal width, and the inner core material 11 is longer in the vertical direction than the outer core material 21.
In the vertical direction, the length L3 of the inner regulating member 10 is shorter than the length L1 of the inner cylinder 2. The length L4 of the outer regulating member 20 is shorter than the length L2 of the outer tube 3.
The amount of protrusion (radial distance) of the inner regulating member 10 from the outer peripheral surface of the inner cylinder 2 and the amount of protrusion (radial distance) of the outer regulating member 20 from the inner peripheral surface of the outer cylinder 3 are equal to each other, Each protrusion amount is shorter than half of the radial distance between the outer circumferential surface of the inner tube 2 and the inner circumferential surface of the outer tube 3. Therefore, the inner facing surface 14a of the inner regulating member 10 and the outer facing surface 24a of the outer regulating member 20 face each other with a predetermined gap maintained in the radial direction.

Here, as shown in FIG. 5, the radial thicknesses t1 and t2 of the outer covering parts 14 and 24 facing each other are equal to each other. Further, the radial thicknesses t1 and t2 are the radial thickness t3 of the inner sheathing portion 13 between the inner tube 2 and the inner core material 11, and the radial thickness t3 of the inner sheathing portion 13 between the inner tube 2 and the inner core material 11, and the radial thickness t3 of the inner sheathing portion 13 between the inner tube 2 and the inner core material 11, and the radial thickness t3 of the inner sheathing portion 13 between the inner tube 2 and the inner core material 11. Each of the inner covering portions 23 is thinner than the radial thickness t4 of the inner covering portion 23.
In addition, in the vertical direction, the length of the adhesive portion of the innermost rubber 5A in the laminated portion 4 with the outer circumferential surface of the inner cylinder 2 (L5 shown in FIG. 4) and the length L3 of the inner regulating member 10 are It is shorter than the length L1 of 2. Furthermore, the length L3 of the inner regulating member 10 is shorter than the length L5 of the bonded portion of the innermost rubber 5A.
Furthermore, in the vertical direction, the length of the adhesive portion of the outermost rubber 5C in the laminated portion 4 to the inner peripheral surface of the outer cylinder 3 (L6 shown in FIG. 4) is equal to the length L2 of the outer cylinder 3. . Further, the length L4 of the outer regulating member 20 is shorter than the length L2 of the outer tube 3. Further, the length L4 of the outer regulating member 20 is shorter than the length L6 of the bonded portion of the outermost rubber 5C.

The cylindrical laminated rubber 1 configured as described above is provided in an axle box support device for a railway vehicle in order to elastically support a bogie frame with respect to a wheel axle. The axle box support device has a well-known structure that includes a coil spring that receives a load mainly in the vertical direction between an axle box body that supports a wheel axle and a bogie frame above the axle box body. The cylindrical laminated rubber 1 is arranged coaxially with the coil spring and between the axle box body and the bogie frame, with the inner cylinder 2 on the bogie frame and the outer cylinder 3 on the axle box body in the same longitudinal direction as in FIG. Each direction is fixed.
Therefore, the cylindrical laminated rubber 1 receives loads mainly in the horizontal direction. When a load is applied in the front-rear direction, the laminated parts 4, 4 are sheared and deformed, and when a load is applied in the left-right direction, the laminated parts 4, 4 are compressively deformed and exert a buffering effect.
When the relative displacement of the axle box with respect to the bogie frame in the longitudinal direction becomes large during acceleration or deceleration, the laminated parts 4, 4 are significantly sheared and deformed. Then, the inner regulating member 10 and the outer regulating member 20 located on either the front or rear of the inner cylinder 2 come relatively close to each other, and the inner facing surface 14a and the outer facing surface 24a are brought into contact with each other. Therefore, large displacement of the cylindrical laminated rubber 1 can be suppressed.

In particular, since the outer covering parts 14 and 24 of the inner regulating member 10 and the outer regulating member 20 come into contact with each other, a buffering effect can also be obtained. Further, the outer sheathing parts 14 and 24, the inner sheathing part 13, and the inner sheathing part 23 are set to have substantially the same compressive strain in the radial direction when they are in contact with each other. Therefore, each covering portion 13, 14, 23, 24 is elastically deformed uniformly, and local stress concentration is less likely to occur.
The inner regulating member 10 and the outer regulating member 20 have the same amount of protrusion from the outer circumferential surface of the inner tube 2 and the same amount of protruding from the inner circumferential surface of the outer tube 3, and the inner opposing surface 14a of the inner regulating member 10 and the outer circumferential surface are the same. The outer facing surface 24a of the regulating member 20 comes into contact with the inner tube 2 and the outer tube 3 at about 1/2 of the radial distance between them. Therefore, the radial lengths of the inner regulating member 10 and the outer regulating member 20 are each shortened, causing deformation (buckling) of both regulating members 10 and 20, and the abutting position of the inner facing surface 14a and the outer facing surface 24a. Misalignment is less likely to occur.

In this way, the cylindrical laminated rubber 1 of the above embodiment is provided with an inner cylinder 2, an outer cylinder 3 coaxially arranged outside the inner cylinder 2, and between the inner cylinder 2 and the outer cylinder 3. 5C (elastic member) and support plates 6A, 6B (support members) are alternately laminated in the radial direction of the outer cylinder 3, and a laminated part 4 is formed in the radial direction between the inner cylinder 2 and the outer cylinder 3. and a cavity 7. The cylindrical laminated rubber 1 has an inner regulating member 10 that is fixed to the inner cylinder 2 in the cavity 7 and extends radially toward the outer cylinder 3, and an inner regulating member 10 that is fixed to the outer cylinder 3 in the cavity 7 and that is fixed to the inner cylinder 2. The inner regulating member 10 and the outer regulating member 20 face each other in the radial direction with a gap in between, and as the laminated portion 4 deforms, the inner regulating member 10 and the outer regulating member 20 extend radially toward each other. The inner facing surface 14a and the outer facing surface 24a (opposing surfaces) can come into contact with each other.
According to this configuration, the regulating member that suppresses large displacement is divided into two parts, the inner regulating member 10 and the outer regulating member 20, so that each member becomes shorter in the radial direction. Therefore, deformation (buckling) of the inner regulating member 10 and outer regulating member 20 and occurrence of deviation in the abutting positions of both regulating members 10 and 20 are suppressed. Further, the degree of freedom in designing both the regulating members 10 and 20 (structure, strength, material) is also increased. Therefore, for example, it may be possible to use a material with lower strength than when there is only one regulating member.

In particular, the inner facing surface 14a and the outer facing surface 24a have different areas. Therefore, deviations in the contact position can be tolerated, and a constant contact area can be maintained even during deformation.
In this case, since the inner facing surface 14a has a larger area than the outer facing surface 24a, the relative displacement of the outer facing surface 24a can be absorbed by the inner facing surface 14a. Since the inner facing surface 14a is longer in the vertical direction than the outer facing surface 24a, relative displacement in the vertical direction can be effectively covered.
The inner facing surface 14a and the outer facing surface 24a are located at 1/2 the distance in the radial direction from the inner cylinder 2 to the outer cylinder 3 when the laminated portion 4 is deformed and abuts each other. Therefore, both regulating members 10 and 20 can be formed to have the same length in the radial direction, and can be designed to have the same strength and the like.
The inner facing surface 14a and the outer facing surface 24a are planes parallel to each other. Therefore, even if the relative positions of both regulating members 10 and 20 change, surface contact is likely to occur.

The inner regulating member 10 and the outer regulating member 20 include an inner core material 11, an outer core material 21, and a covering rubber 12 that covers the inner core material 11 and the outer core material 21 to form an inner facing surface 14a and an outer facing surface 24a. and a covering rubber 22 (covering elastic member). Therefore, a shock-absorbing effect can be obtained at the initial stage of contact between the regulating members 10 and 20, and even if a deviation occurs in the mutual contact angles, it can be absorbed by the covering rubbers 12 and 22. Furthermore, both the regulating members 10 and 20 and the inner cylinder 2 and outer cylinder 3 can be vulcanized and bonded via the covering rubbers 12 and 22. It also prevents corrosion of the metal inner core material 11 and outer core material 21.
The inner core material 11 and the outer core material 21 are made of metal (a material harder than the covering rubbers 12 and 22). Therefore, the strength of both regulating members 10 and 20 can be maintained.
The surface of the inner core material 11 of the inner regulating member 10 that faces the inner tube 2 (inner tube opposing surface) is a curved surface 11a that is concentric with the inner tube 2. The surface facing the outer cylinder 3 (outer cylinder facing surface) is a bulged surface 21a that is concentric with the outer cylinder 3. Therefore, both the regulating members 10 and 20 can be easily fixed to the inner tube 2 and the outer tube 3. Further, since the impact generated when the inner facing surface 14a and the outer facing surface 24a come into contact is equally transmitted to the inner cylinder 2 and the outer cylinder 3, damage to both the regulating members 10 and 20 due to stress concentration is suppressed.

The covering rubber 12 of the inner regulating member 10 is connected to the rubbers 5A, 5A of the laminated parts 4, 4 on the outer peripheral surface of the inner cylinder 2, and the covering rubber 22 of the outer regulating member 20 is connected to the rubber 5C of the laminated parts 4, 4. , 5C via rubbers 25, 25 on the inner circumferential surface of the outer cylinder 3. Therefore, both regulating members 10 and 20 can be easily molded. This also helps prevent the coating rubbers 12 and 22 from peeling off.
The covering rubber 12 of the inner regulating member 10 is also interposed between the inner cylinder 2 and the inner core material 11 as an inner covering part 13, and the covering rubber 22 of the outer regulating member 20 is interposed between the outer cylinder 3 and the outer core material 21. The thickness of the outer covering part 14 on the inner facing surface 14 a and the outer covering part 24 on the outer facing surface 24 a is less than or equal to the thickness of the inner covering parts 13 and 23 . Further, the outer covering portions 14 and 24 of the inner facing surface 14a and the outer facing surface 24a and the inner covering portions 13 and 23 are provided so that the compressive strain in the radial direction is approximately the same when they are in contact with each other. ing. Therefore, deformation and damage due to stress concentration on the low-rigidity portion when both the regulating members 10 and 20 come into contact can be suppressed.

In the axial direction of the inner cylinder 2, the length L5 of the part of the rubber 5A in the laminated portion 4 that comes into contact with the outer peripheral surface of the inner cylinder 2 and the length L3 of the inner regulating member 10 are longer than the length L1 of the inner cylinder 2. In addition, the length L3 of the inner regulating member 10 is shorter than the length L5 of the portion of the rubber 5A in contact with the outer peripheral surface of the inner cylinder 2. Further, in the axial direction of the outer cylinder 3, the length L6 of the portion of the rubber 5C in the laminated portion 4 that contacts the inner circumferential surface of the outer cylinder 3 is equal to the length L2 of the outer cylinder 3, and the outer regulating member The length L4 of 20 is shorter than the length L2 of the outer cylinder 3. The length L4 of the outer regulating member 20 is shorter than the length L6 of the portion of the rubber 5C that comes into contact with the inner circumferential surface of the outer cylinder 3. That is, since the rubber 5A and the inner regulating member 10 are shorter than the inner cylinder 2, and the rubber 5C and the outer regulating member 20 are the same length as or shorter than the outer cylinder 3, the rubbers 5A, 5C and both regulating members 10, 20 is suppressed. Moreover, since both the regulating members 10 and 20 have a length equal to or less than the length of the rubbers 5A and 5C, the regulating members 10 and 20 do not inhibit the deformation of the laminated portion 4 in the axial direction.

An example of the change will be explained below.
In the above embodiment, the inner facing surface of the inner regulating member and the outer facing surface of the outer regulating member have different areas such that the inner facing surface is longer in the vertical direction; The area may be made different by increasing the left and right width so that the inner facing surface becomes larger in the circumferential direction. The inner facing surface may have a larger area in both the vertical direction and the circumferential direction. Conversely, the outer facing surface may have a larger area than the inner facing surface, or the inner facing surface and the outer facing surface may have the same area.
The inner regulating member and the outer regulating member are not limited to a form in which the left and right widths are the same in the radial direction. For example, it may have a tapered shape (trapezoidal shape in plan view) in which the left and right width decreases as it goes from the side fixed to the inner cylinder or the outer cylinder to the side facing each other. This also applies to the core material (including the inner core material and the outer core material, the same applies hereinafter).

The contact position between the inner facing surface and the outer facing surface is not limited to 1/2 of the radial distance between the inner cylinder and the outer cylinder, but may be between 1/3 and 2/3. In this case as well, substantially the same design can be achieved with both regulating members.
The inner facing surface and the outer facing surface are not limited to flat surfaces. They do not need to be parallel to each other as long as there is no effect of stress concentration.
The covering rubber is not limited to covering the front, rear, left, and right sides of the core material, and may cover the upper and lower surfaces of the core material. The covering rubber only needs to be on at least the opposing surface side. Therefore, the inner covering portion may be omitted and the core material may be directly fixed to the inner cylinder and the outer cylinder. In this case, the core material may be formed integrally with the inner tube and the outer tube. The covering rubber itself can also be omitted.
The core material is not limited to metal. It may be made of resin or the like as long as it is harder than the covering rubber. A plurality of core materials and a plurality of covering rubbers may be stacked in the radial direction.
The surface of the core material that faces the inner tube and the outer tube does not have to be a curved surface or a bulging surface. For example, it may be a flat surface.
The inner regulating member and the outer regulating member do not have to have the same structure. For example, one of the regulating members may have a structure without a core material, or a structure without a covering rubber, etc., so long as the desired cushioning effect can be obtained, different structures may be used.

The inner covering portions of the inner regulating member and the outer regulating member may have a form in which they are not connected to the rubber of the laminated portion.
The relationship between the radial thicknesses of the outer covering part and the inner covering part of the inner regulating member and the outer regulating member is not limited to the above embodiment. For example, each outer sheath may have the same thickness as the inner sheath, or each outer sheath may have a greater thickness than the inner sheath.
The compressive strain in the radial direction when the outer covering portions of the inner regulating member and the outer regulating member come into contact with each other may not be the same as the compressive strain of each inner covering portion, as long as there is no influence of stress concentration.
In the above embodiment, the length L3 in the vertical direction of the inner regulating member is shorter than the length L5 of the innermost rubber part of the laminated portion that contacts the outer circumferential surface of the inner cylinder, but the length L3 of the inner regulating member L3 may be the same as the length L5 of the innermost rubber. The length L5 of the abutting portion may be the same as the length L1 of the inner cylinder 2.
Furthermore, the length L6 of the portion of the outermost rubber in the laminated portion that contacts the inner circumferential surface of the outer cylinder is equal to the length L2 of the outer cylinder; however, the length L6 of the outermost rubber is It may be shorter than the length L2 of the cylinder. Furthermore, the length L4 of the outer regulating member may be the same as the length L6 of the outermost rubber.

In addition, the number (layers) of rubber and support plates in the laminated portion can be increased or decreased as appropriate. The shape of the support plate can also be changed as appropriate.
The shapes of the laminated portion and the void portion are not limited to the above forms.

1. Cylindrical laminated rubber, 2. Inner cylinder, 3. Outer cylinder, 4. Laminated portion, 5A to 5C, 25. Rubber, 6A, 6B. Support plate, 7. Gap portion, 10. - Inner regulating member, 11... Inner core material, 11a... Curved surface, 11b, 21b... Plane, 12, 22... Covering rubber, 13, 23... Inner coating part, 14, 24... Outer coating part. , 14a...inner facing surface, 20...outer regulating member, 21...outer core material, 21a...bulging surface, 24a...outer facing surface, L1...vertical length of inner cylinder, L2...outer Vertical length of the cylinder, L3: Vertical length of the inner regulating member, L4: Vertical length of the outer regulating member, L5: Vertical length of the part of the innermost rubber that contacts the outer peripheral surface of the inner cylinder Length in the vertical direction, L6: Vertical length of the part of the outermost rubber in contact with the inner peripheral surface of the outer cylinder.

Claims (13)

1. an inner cylinder, an outer cylinder disposed coaxially outside the inner cylinder, and an elastic member and a support member provided between the inner cylinder and the outer cylinder, and alternately stacked in a radial direction of the outer cylinder. A cylindrical laminated rubber comprising: a laminated portion consisting of a laminate portion; and a gap portion formed in the radial direction between the inner cylinder and the outer cylinder,
   an inner regulating member fixed to the inner cylinder within the cavity and extending in the radial direction toward the outer cylinder;
   an outer regulating member fixed to the outer cylinder within the cavity and extending in the radial direction toward the inner cylinder,
   The inner regulating member and the outer regulating member are opposed to each other in the radial direction with a gap therebetween, and their opposing surfaces can come into contact with each other as the laminated portion deforms. Cylindrical laminated rubber.
2. The cylindrical laminated rubber according to claim 1, wherein each of the opposing surfaces has a different area.
3. The cylindrical laminated rubber according to claim 2, wherein the opposing surface of the inner regulating member has a larger area than the opposing surface of the outer regulating member.
4. The cylindrical laminated rubber according to claim 2 or 3, wherein the opposing surface of the inner regulating member is longer than the opposing surface of the outer regulating member in the axial direction of the outer cylinder.
5. Each of the opposing surfaces is located at a position of 1/3 to 2/3 of the distance in the radial direction from the inner cylinder to the outer cylinder when the laminated parts are deformed and abut each other. The cylindrical laminated rubber according to any one of claims 1 to 4.
6. The cylindrical laminated rubber according to any one of claims 1 to 5, wherein each of the opposing surfaces is a plane parallel to each other.
7. 7. The inner regulating member and the outer regulating member each include a core material and a covered elastic member that covers at least the opposing surface side of the core material to form the opposing surface. The cylindrical laminated rubber according to any one of.
8. The cylindrical laminated rubber according to claim 7, wherein the core material is made of a harder material than the covering elastic member.
9. The inner cylinder facing surface of the core material of the inner regulating member is a curved surface concentric with the inner cylinder,
   The cylindrical laminated rubber according to claim 7 or 8, wherein a surface of the core material of the outer regulating member facing the outer cylinder is a bulged surface concentric with the outer cylinder.
10. The covering elastic member of the inner regulating member is connected to the elastic member of the laminated portion at the outer peripheral surface of the inner cylinder,
    The cylindrical laminated rubber according to any one of claims 7 to 9, wherein the covering elastic member of the outer regulating member is connected to the elastic member of the laminated portion at an inner circumferential surface of the outer cylinder.
11. The covering elastic member of the inner regulating member is also interposed between the inner cylinder and the core material, and the covering elastic member of the outer regulating member is also interposed between the outer cylinder and the core material. Been,
    The thickness of each of the covering elastic members on each of the opposing surfaces is the thickness of the covering elastic member between the inner cylinder and the core material, and the thickness of the covering elastic member between the outer cylinder and the core material. The thickness is less than or equal to
    Each of the covering elastic members on each of the opposing surfaces in contact with each other, and each of the covering elastic members between the inner cylinder and the core material and between the outer cylinder and the core material, The cylindrical laminated rubber according to any one of claims 7 to 10, wherein the cylindrical laminated rubber is provided so that the compressive strain in the radial direction is substantially the same.
12. In the axial direction of the inner cylinder, the length of the portion of the laminated portion where the elastic member contacts the outer peripheral surface of the inner cylinder and the length of the inner regulating member are equal to or less than the length of the inner cylinder. , and the length of the inner regulating member is equal to or less than the length of a portion of the laminated portion that contacts the outer circumferential surface of the inner cylinder of the elastic member;
    In the axial direction of the outer cylinder, the length of the portion of the laminated portion where the elastic member contacts the inner circumferential surface of the outer cylinder and the length of the outer regulating member are equal to or less than the length of the outer cylinder. 12. The length of the outer regulating member is equal to or less than the length of a portion of the laminated portion that contacts the inner peripheral surface of the outer cylinder of the elastic member. The cylindrical laminated rubber according to any one of.
13. An axle box for a railway vehicle, characterized in that a coil spring and the cylindrical laminated rubber according to any one of claims 1 to 12 are arranged between an axle box body supporting a wheel axle and a bogie frame above the axle box body. Support device.

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