JP2010276101A - Bearing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuously connecting structure of a low floor LRV vehicle having a spherical bearing for reducing even a burden of getting on and off, by lowering a floor surface height of the whole vehicle inside, by reducing a continuously connecting part used for a streetcar, by forming a necessary minimum compact constitution. <P>SOLUTION: This bearing structure comprises an outside casing 2 for arranging a vehicle body installing screw hole on an under surface, forming an inside surface of a cylindrical sidewall as a concave spherical inner peripheral surface 2c, arranging a recessed part 2d in a lower part. forming a bottom surface 2e of the recessed part as a convex spherical surface and further boring a hole 2f on the bottom surface, an outside ball 3 for arranging the vehicle body installing screw hole on an upper surface, forming a convex spherical surface 3b for setting a radius of curvature in the same as the concave spherical inner peripheral surface formed in the outside casing on an outer peripheral surface and arranging a female screw 3c in the lower part, and a fixing pin (4) for forming a spherical flange 4b in one and arranging a male screw 4d threadedly engaging with the female screw 3c arranged in the outside ball via the hole 2f bored on the bottom surface of the recessed part arranged in the lower part of the outside casing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle using a connection bearing (spherical bearing) used for connection between a body of a tram or light rail vehicle traveling mainly in the city and a bogie (a bogie with a rotating axle) and a vehicle without a bogie. In particular, the present invention relates to a bearing structure used for a connecting structure of a low floor type LRV vehicle. In this case, “low-floor LRV vehicle” means a lightweight railroad that is easy to get on and off even for elderly people, infants, and wheelchair users, with no or only a part of the steps for getting on and off the normal stilt tram. A light vehicle.

  The total weight of trams is restricted by road structure standards, Article 2 of the Road Transport Vehicle Act, and Vehicle Restriction Ordinances. Considering the weight of the vehicle body structure and the weight of the air conditioner, it is difficult to keep the total weight of the vehicle within the weight limit in the configuration of one vehicle and two trucks. Therefore, the number of trolleys appropriate for satisfying the design maximum speed, curve passing, etc. is set to limit the total vehicle weight. As a configuration, a configuration in which a vehicle without a carriage is arranged between vehicles on which a carriage is installed and is often placed on an end portion with the carriage is seen. As a method for connecting the end portions, spherical bearings are used as means for following a horizontal curve passage, a vertical curve passage, or a vehicle body inclination between vehicles.

  In FIG. 12A, a vehicle body A provided with a carriage, a vehicle body B without a carriage, and an end extension portion at the upper part of the vehicle body B without a carriage are placed on an end extension portion at the lower part of the vehicle body A provided with a carriage. FIG. 12B and FIG. 12C are enlarged views of the P portion and the Q portion of FIG. 12A. As shown in these drawings, the lower end extension 101 between the lower end extension 101 of the vehicle body A and the upper end extension 102 of the upper part of the vehicle B is overlapped with each other. A spherical bearing 103 is attached to the center of the vehicle between the upper end extension 102.

  FIG. 13 is a view showing a specific example of a conventional spherical bearing 103 disposed between the vehicle body A and the vehicle body B. As shown in FIG. That is, the spherical bearing 103 includes an outer casing 103 a that is attached to the lower extension portion 101 of the vehicle body A by bolts, and an outer ball 103 b that is attached to the upper extension portion 102 of the vehicle body B by bolts. Further, a central post 103c is erected from the lower center of the outer casing 103a, and an inner ball 103d is fixed to the upper portion of the central post 103c by a bolt 104. Further, the configuration of the spherical bearing will be described in detail. A spherical insertion portion 103e is disposed inside the cylindrical portion 103a1 of the outer casing 103a. Usually, the material of the spherical insertion portion 103e is PTFE (polytetrafluoroethylene). The inner peripheral surface 103e1 of the spherical insertion portion 103e is a spherical surface having the same radius of curvature as the outer spherical surface (bearing surface) 103b1 of the outer ball 103b. Further, the inner ball surface 103b2 of the outer ball 103b has a spherical ball surface having the same radius of curvature as the outer peripheral surface 103d1 of the inner ball 103d (Patent Document 1).

  In the spherical bearing having the above configuration, the spherical insertion portion 103e is fixed to the inner surface of the outer casing 103a, and the outer spherical bearing surface of the outer ball 103b is fixed to the spherical load bearing surface (inner peripheral surface) 103e1 of the spherical insertion portion 103e. (Outer spherical surface) 103b1 is in contact with the inner ball surface 103b2 of the outer ball 103b, and the outer spherical bearing (outer peripheral surface) 103d1 of the inner ball 103d is in contact, and the outer ball 103b is sandwiched between the outer housing 103a and the inner ball 103d. It is a configuration. Further, a fixing screw hole is provided in the inner ball 103d and the central post 103c of the outer casing 103a, and the inner ball 103d and the outer casing 103a are fixed by a fixing screw (bolt) 104. Reference numerals 103a2 and 103b3 denote female screw holes for fixing to the vehicle body A and the vehicle body B, respectively.

Special table 2005-504241

  In the spherical bearing described above, the inner ball 103d controls the outer ball 103b to be removed from the outer casing 103a in the vertical direction, but the connection between the inner ball 103d and the outer casing 103a is usually five fixed. Since it is a screw, it is a structure that receives all the load applied in the direction of pulling out vertically with a fixing screw. Therefore, this load resistance depends on the diameter of the fixing screw. The fixing screw diameter is determined by the diameter of the central post 103c and the number of fixing screws, and it is difficult to compensate for the required load resistance. Depending on the application of the spherical bearing (small radial force), the spherical radius of the outer ball is reduced. Along with this, the surface of the central post 103c is also reduced, so that the diameter of the fixing screw is also reduced, and furthermore, it is difficult to compensate for the load that escapes in the vertical direction. The central post 103c may be enlarged, but the outer ball and the inner ball are also increased in conjunction with this, resulting in an increase in weight and cost. If the outer casing or center post is large, the connecting part is large and the floor height is difficult to reduce. Further, when the fixing screw is loosened, the inner ball and the outer ball are separated, and the connected vehicle may be derailed. In addition, since the vehicles are separated at the time of derailment and restoration, it may be necessary to restore each vehicle and restore the joints.

  The present invention has been made in order to cope with the above-described problems, and with a spherical bearing attached, the load resistance is not determined by the diameter of the central post and the number of fixing screws, but the minimum required compact size. Spherical bearings that reduce the connecting part used in the tramway and reduce the overall floor height of the car, as well as a flat floor without any steps in the car and lightly loading and unloading. It aims at providing the connection structure of the low floor LRV vehicle which has this.

That is, in order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that the bearing structure is provided with a body mounting screw hole (2a) on the lower surface, and the inner side surface of the cylindrical side wall is formed into a concave spherical inner periphery. A surface (2c) is formed, a recess (2d) is provided at the lower portion, a bottom surface (2e) of the recess (2d) is formed in a convex spherical shape, and a hole (2f) is formed in the bottom surface (2e). A perforated outer casing (2);
A car body mounting screw hole (3a) is provided on the upper surface, and a convex spherical surface (3b) having the same radius of curvature as the concave spherical inner peripheral surface (2c) formed on the outer casing (2) is formed on the outer peripheral surface. An outer ball (3) provided with a female screw (3c) at the bottom;
A spherical surface formed so as to come into surface contact when a force is applied in a direction in which the bottom surface (2e) of the recess (2d) provided in the external housing (2) is perpendicular to one of the shafts (4a). A bottom surface (2e) of a recess (2d) that forms a flange (4b) and is provided with a locking screw hole (4c) on the other end surface of the shaft (4a) and provided at the lower portion of the outer casing (2) A fixing pin (4) provided with a male screw (4d) to be screwed into a female screw (3c) provided on the outer ball (3) through a hole (2f) drilled in
It is characterized by comprising.

  According to a second aspect of the present invention, a concave portion (3d) is formed in the upper portion of the outer ball (3), and the outer ball (3) and the fixing pin (4) are screwed into the concave portion (3d). A loosening set screw (5) for stopping is provided.

  The invention according to claim 3 is characterized in that the other shaft of the fixing pin (24) in which a spherical flange (24b) is formed on one of the thick shafts (24a) is a polygonal shaft portion (24d), The lower surface of the outer ball is provided with a polygonal (hexagonal) hole (23c) into which the hexagonal shaft (24d) of the fixing pin (24) is fitted.

  The invention according to claim 4 is characterized in that the bearing structure has an outer housing (32) in which a vehicle body mounting screw hole (32a) is provided on the lower surface and a concave spherical inner peripheral surface (32c) is formed, and a vehicle body mounting screw on the upper surface. A spherical surface in which a hole (33a) is provided and a space (33d) is provided around the center line to form a convex spherical outer peripheral surface (33b) having the same radius of curvature as the concave spherical inner peripheral surface (32c) and to come into spherical contact An outer ball (33) having a shape and a female screw hole (35a) for fixing screw are provided to form a concave spherical inner peripheral surface (35b) having the same radius of curvature as the inner peripheral surface (32c) of the outer ball (33). A retaining screw (35) that comes into spherical contact with the upper surface of the spherical surface of the outer ball (33), and a fixing screw that fixes the outer housing (32) and the retaining member (35) in the vicinity of the periphery. 34) and .

According to the fifth aspect of the invention, the bearing structure has a side wall outer peripheral portion (42b), an inner peripheral surface is a concave spherical inner peripheral surface (42c), and an outer casing (42) provided with a female screw (42f). When,
A screw hole (43a) for mounting the vehicle body is provided on the upper surface, and a convex spherical outer peripheral surface (43b) having the same radius of curvature as the concave spherical inner peripheral surface (42c) of the outer casing (42) is formed. An outer ball (43) having a concave spherical inner peripheral surface (43c) formed thereon,
A fixing pin (44) having a flange portion (44a) formed at the upper portion and a male screw (44d) threadedly engaged with the female screw (42f) of the lower housing (42) at the lower portion;
An arc-shaped block (45a) having an outer peripheral surface having the same curvature as the concave spherical inner peripheral surface (43c) of the outer ball (43), and a rectangular block (45b) having an outer peripheral surface having the same curvature. A constraining block (45) in which a convex part is provided on either side and a concave groove that fits the convex part is provided on the other side, and a donut-shaped ring is formed as a whole,
It is characterized by having.

In the invention according to claim 6, the bearing structure has a fixing pin (54) provided with a male screw (54d) on one side,
A lower lower housing (52A) provided with a concave spherical inner peripheral surface (52Ac) and a hole (52Ab) for fitting the fixing pin (54) from below;
An outer ball (53) provided with a convex spherical outer peripheral surface (53b) having the same radius of curvature as the concave spherical inner peripheral surface (52Aa) of the lower lower housing (52A);
A concave spherical inner peripheral surface (52Ba) having the same radius of curvature as the convex spherical outer peripheral surface (53c) of the upper part of the outer ball (53), and a female screw to be screwed with a male screw of the fixing pin (54) below the center portion An upper outer casing (52B) provided with (52Be);
It is characterized by having.

  According to a seventh aspect of the present invention, the lower outer casing (52A) is provided with a flange portion (52Af) provided with a screw hole (52Aa) attached to one vehicle body, and the outer ball (53) is provided with the flange portion (52Af). Is characterized in that a flange portion (53f) provided with a screw hole (53a) to be attached to the other vehicle body is provided.

  According to an eighth aspect of the present invention, a boss portion 52Bd provided with a female screw 52Be is formed at the center of the upper outer casing (52B), and the male screw 54d of the forward fixing pin (54) is screwed together. The locking screw (5) is inserted from above and is screwed and fixed to the female screw of the fixing pin (54).

  If the present invention is the above means, when the outer casing and the outer ball of the spherical bearing having the bearing structure of the present invention are respectively attached to the vehicle body, the force received in the radial direction and the force received in the vertical direction are divided. I can think about it, and I can build it for my purpose. Further, the spherical bearing constituting the connecting structure of the low floor LRV vehicle according to the present invention can have a minimum necessary compact configuration in a vehicle whose weight is limited, and is effective in reducing the weight. . In addition, less material is used, and the cost can be reduced. Since the weight can be reduced and the size can be reduced, the connecting portion used in a streetcar or the like can be made small and low. This leads to lowering the overall floor height in the car. Moreover, since the indoor floor is flat and there is no need to install steps or slopes, it is also effective as a barrier-free measure. Furthermore, it is possible to provide a high population that does not impose a burden on getting on and off passengers.

FIG. 1A is a longitudinal sectional view of a first embodiment of the bearing structure of the present invention, and FIG. 1B is a perspective view of a fixed pin constituting the spherical bearing. FIG. 2 (A) is a cross-sectional view of a state where a spherical bearing having the bearing structure of the first embodiment is attached to a tram, and FIG. 2 (B) is a spherical surface of the bearing structure of the first embodiment. It is sectional drawing of the state which attached the bearing to the streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. FIG. 3A is a longitudinal sectional view of a second embodiment of the spherical bearing having the bearing structure of the present invention, and FIG. 3B is a perspective view of a fixing pin constituting the spherical bearing. FIG. 4A is a cross-sectional view of a state in which a spherical bearing having the bearing structure of the second embodiment is attached to a streetcar, and FIG. 4B similarly has the bearing structure of the second embodiment. It is sectional drawing of the state which attached the spherical bearing to the streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. It is a longitudinal cross-sectional view of the 3rd Example of the bearing structure of this invention. FIG. 6A is a cross-sectional view of a state in which a spherical bearing having the bearing structure of the third embodiment is attached to a tram, and FIG. 6B also has the bearing structure of the third embodiment. It is sectional drawing of the state which attached the spherical bearing to the streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. FIG. 7A is a plan view of a fourth embodiment of the spherical bearing having the bearing structure of the present invention, and FIG. 7B is a longitudinal sectional view thereof. It is a perspective view of the state which decomposed | disassembled the spherical bearing which has a bearing structure of a 4th Example. FIG. 9A is a cross-sectional view of a state in which a spherical bearing having the bearing structure of the fourth embodiment is attached to a streetcar, and FIG. 9B also has the bearing structure of the fourth embodiment. It is sectional drawing of the state which attached the spherical bearing to the streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. It is a longitudinal cross-sectional view of the 5th Example of the bearing structure of this invention. FIG. 11A is a cross-sectional view of a state in which a spherical bearing having the bearing structure of the fifth embodiment is attached to a tram, and FIG. 11B similarly has the bearing structure of the fourth embodiment. It is sectional drawing of the state which attached the spherical bearing to the streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. FIG. 12A is a diagram illustrating a connecting portion of the vehicle A provided with the carriage, the vehicle B without the carriage, and the vehicle A provided with the carriage. FIG. 12B is a diagram of FIG. FIG. 12C is an enlarged view of a portion P, and FIG. 12C is an enlarged view of a portion Q of FIG. It is sectional drawing of the thrust bearing used for the conventional vehicle connection part.

  FIG. 1A is a longitudinal sectional view of a first embodiment of a spherical bearing having a bearing structure used in the connecting structure of the low floor LRV vehicle of the present invention, and FIG. 1B is this bearing structure. It is a perspective view of the fixed pin which comprises the spherical bearing which has these. The spherical bearing 1 is provided with a body mounting screw hole 2a on the lower surface, an inner side surface 2c of the cylindrical side wall 2b is formed on a concave spherical inner peripheral surface, a lower portion is provided with a concave portion 2d, and a bottom surface 2e of the concave portion 2d is provided. A concave spherical inner peripheral surface formed in the outer casing 2 on the outer peripheral surface with an outer casing 2 formed in a convex spherical shape and further provided with a hole 2f in the bottom surface 2e and a body mounting screw hole 3a on the upper surface. 2c is formed with a convex spherical surface 3b having the same radius of curvature as that of the outer ball 3 provided with a female screw 3c at the lower portion and a thick shaft body 4a. A spherical flange 4b is formed so as to come into surface contact with the bottom surface 2e of the concave portion 2d provided in 2, and the bottom surface 2e of the concave portion 2d provided in the lower portion of the outer casing 2 is formed at the other end of the shaft body 4a. Provided in the outer ball 3 through a hole 2f formed in Has a fixed pin 4 provided with a male thread 4d screwing the female screw 3c, the.

  A plurality of locking screws 4c are provided on the end surface of the male screw 4d. A locking screw 5 is attached to the fixing pin 4 via the outer ball 3 in the locking screw hole 4c. In this case, the head 5 a of the locking screw 5 is designed to be immersed in the recess 3 d of the outer ball 3. Further, the concave portion 2d at the lower portion of the outer casing 2 is formed to a depth such that the spherical flange 4b of the fixing pin 4 does not protrude outward. The bottom surface 2e of the concave portion 2d of the outer housing 2 is formed in a convex spherical shape, and when the male screw 4d of the fixing pin 4 is screwed into the female screw 3c of the outer ball 3, the convex spherical surface 2e and the spherical flange 4b Although it is in surface contact with the inner surface, it is in particular in spherical contact. In addition, after attaching the fixing pin 4 from the outer housing | casing 2 and attaching the locking screw 5 to the fixing pin 4 via the outer ball | bowl 3, the cover 6 and the cover 7 are each attached.

FIG. 2A is a cross-sectional view of a state in which the spherical bearing 1 having the bearing structure of the first embodiment is attached to a streetcar, and FIG. 2B is the same as the bearing structure of the first embodiment. It is sectional drawing of the state which attached the spherical bearing 1 which has it to a streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. In this case, the outer casing 2 is attached to one vehicle body A, and the outer ball 3 is attached to the other vehicle body B.
When passing through a horizontal curve or a vertical curve, the spherical contact between the concave spherical inner peripheral surface 2c of the outer housing 2 and the convex spherical surface 3b of the outer ball 3 corresponds to the radial load, and the outer ball 3 and the outer housing 3 are recessed. The spherical contact between the spherical inner peripheral surface 2c and the bottom surface 2e of the recess 2d and the spherical flange 4b of the fixing pin 4 corresponds to the retaining in the vertical direction.

  FIG. 3A is a longitudinal sectional view of a second embodiment of a spherical bearing having a bearing structure used in the connecting structure of the low-floor LRV vehicle of the present invention, and FIG. 3B is this spherical bearing. FIG. 20 is a perspective view of a fixing pin constituting 20. The spherical bearing 20 constituting the connecting structure of the low-floor LRV vehicle of the present invention includes an outer housing 22, an outer ball 23, and a fixing pin 24 similar to those in the first embodiment. This embodiment is almost the same as the case of the first embodiment. That is, the outer housing 22 is the same as the spherical bearing 2 having the bearing structure of the first embodiment, but the outer ball 23 and the fixing pin 24 are slightly different. That is, the other shaft of the fixing pin 24, which is a thick shaft and has a spherical flange 24b formed on one of the shafts 24a, is a polygonal (for example, hexagonal) shaft portion 24d. The polygonal (hexagonal) shaft portion 24d is formed in a polygonal (hexagonal) hole 23c.

Further, a plurality of female screws 24c for the locking screws 5 are provided on the hexagonal shaft portion 24a. When the locking screw 5 is attached to the fixing pin 24 through the hole 22 f of the outer housing 22, the head 5 a of the locking screw 5 is inserted into the recess 23 d of the outer ball 23. Further, a concave portion 22d is formed in the lower portion of the outer casing 22 so that the spherical flange 24b of the fixing pin 24 does not protrude outward. The hole 23c can be formed by forging or the like.
Further, after the fixing pin 24 is attached from the outer casing 22 and the locking screw 5 is attached to the fixing pin 24 via the outer ball 23, the cover 6 and the cover 7 are respectively attached.

FIG. 4A is a cross-sectional view of a state in which the spherical bearing 20 having the bearing structure of the second embodiment is attached to a streetcar, and FIG. 4B is the same as the bearing structure of the second embodiment. It is sectional drawing of the state which attached the spherical bearing 20 which has it to a streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. In addition, the state which passes the vertical curve in driving | running | working is substantially the same as the state which passes a vertical curve.
When passing through a horizontal curve or a vertical curve, the spherical contact between the concave spherical inner peripheral surface 22c of the outer casing 22 and the convex spherical surface 23b of the outer ball 23 corresponds to the radial load, and the outer ball 23 and the concave section 22d of the outer casing 22 The spherical contact between the bottom surface 22e and the spherical flange 24b corresponds to the retaining in the vertical direction.

FIG. 5 is a longitudinal sectional view of a third embodiment of a spherical bearing having a bearing structure used for the connecting structure of the low floor LRV vehicle of the present invention. The spherical bearing 30 has a large space around the outer casing 32 provided with a body mounting screw hole 32a on the lower surface and a concave spherical inner peripheral surface 32c, and with a vehicle body mounting screw hole 33a on the upper surface and including the center line. 33d, a convex outer peripheral surface 33b having the same radius of curvature as the concave spherical inner peripheral surface 32c is formed and brought into spherical contact, and a spherical outer ball 33 provided with a body mounting screw hole 33a on the upper surface is fixed. A female female screw hole 35a is provided to form a concave spherical inner peripheral surface 35b having the same radius of curvature as the inner peripheral surface 32c of the outer ball 33, and is in spherical contact with the upper surface from the spherical shape center point of the outer ball 33. A retainer 35 and a fixing screw 34 for fixing the outer casing 32 and the retainer 35 in the vicinity of the periphery are provided. The radius of curvature R _A of the concave spherical inner peripheral surface 32c of the outer casing 32 and the radius of curvature R _B of the concave spherical inner peripheral surface 35b of the retaining member 35 are the same.

FIG. 6A is a cross-sectional view of a state in which a spherical bearing 30 having the bearing structure of the third embodiment is attached to a streetcar, and FIG. 6B shows the bearing structure of the third embodiment. It is sectional drawing of the state which attached the spherical bearing 30 which has it to a streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working.
When passing through a horizontal curve or a vertical curve, the outer casing 32, the outer ball 33, and the retainer 35 that come into spherical contact with the lower surface from the center point of the spherical shape correspond to the radial load. The retainer 35 and the fixing screw 34 that come into spherical contact with the upper surface from the point O correspond to the retainer in the vertical direction. When this structure is attached to the vehicle body in order to fix the outer housing 32 from the lower surface with screws, the vehicle body parts also serve to prevent the screws from loosening and the outer housing 32 and the outer balls 33 are not separated.

  FIG. 7A is a plan view of a spherical bearing according to a fourth embodiment of the bearing structure used in the connecting structure of the low floor LRV vehicle of the present invention, and FIG. 7B is a longitudinal sectional view. The spherical bearing 40 includes an outer casing 42, an outer ball 43, a fixing pin 44, and a restraining block 45. The outer casing 42 has a cylindrical shape, and is provided with a cylindrical side wall 42b and a female screw part 42f for screwing a male screw part 44d of the fixing pin 44 at the center. The female screw 42f is provided on a boss portion 42e provided inside the outer casing 42. Further, the inner peripheral surface 42 c of the outer casing 42 is a concave spherical inner peripheral surface, and has the same radius of curvature as the convex spherical outer peripheral surface 43 b of the outer ball 43. The fixing pin 44 forms a flange portion 44a at the upper portion of the shaft, and is next to the space portion space portion 43d between the lower side of the flange portion 44a and the concave spherical inner peripheral surface 43c of the outer ball 43. The restraining block 45 to be described can be fitted. Further, a male screw 44d that is screwed with the female screw 42c of the outer casing 42 is formed at the lower part of the shaft of the fixing pin 44. Next, the constraining block 45 includes an arc-shaped block 45a having an outer peripheral surface having the same curvature as the concave spherical inner peripheral surface 43c of the outer ball, and a rectangular block 45b having a similar outer peripheral surface. And the convex part 45c provided in the both ends of the circular-arc-shaped block 45a is engage | inserted in the groove | channel 45d provided in the rectangular block 45b, and is made into the donut-shaped ring body as a whole. The convex portion 45c may be provided on the rectangular block 45b side, and the groove 45d may be provided on the arc-shaped block 45a side.

When assembling the spherical bearing 40 having the bearing structure of the fourth embodiment, it is assembled as follows.
As shown in FIG. 8, the arc-shaped block 45a of the restraining block 45 and the rectangular block 45b are assembled in the outer ball | bowl 43, and let the whole be a donut-shaped ring. Then, the assembly of the outer ball 43 and the restraining block 45 is fitted into the outer casing 42. The fixing pin 44 is stopped from above the outer ball 42 so that the restraining block 45 is fixed around the shaft portion of the fixing pin 44, and the male screw portion 44 d of the fixing pin 44 is replaced with the female screw portion 42 c of the outer housing 42. Screw in and fix securely. Then, the vehicle body A is attached to the vehicle body A through the vehicle body attachment screw hole 42a of the outer casing 42, and the vehicle body B is attached to the vehicle body B through the vehicle body attachment screw hole 43a of the outer ball 43.

FIG. 9A is a cross-sectional view of a state in which the spherical bearing 40 having the bearing structure of the fourth embodiment is attached to a streetcar, and FIG. 9B shows the bearing structure of the fourth embodiment. It is sectional drawing of the state which attached the spherical bearing 40 which has it to a streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working.
Also in this embodiment, the state of attachment to the vehicle body and the behavior when passing the vertical curve during vehicle travel are the same as described above, and the force received in the radial direction and the force received in the vertical direction can be considered separately.

  FIG. 10 is a vertical cross-sectional view of a fifth embodiment of a spherical bearing having a bearing structure used in the connecting structure of the low floor LRV vehicle of the present invention. The spherical bearing 50 forms a flange portion 52Af provided with a screw hole 52Aa to be attached to the vehicle body, and a lower outer casing 52A provided with a cylindrical hole 52Ab for fitting a fixing pin 54 to be described later from below. An outer ball 53 having a convex spherical outer peripheral surface 53b whose lower outer peripheral surface has the same radius of curvature as the inner peripheral surface (spherical) 52Ac of the lower outer casing 52A, and an upper convex spherical outer peripheral surface 53c of the outer ball 53 And an inner peripheral surface (concave spherical inner peripheral surface) 52Ba have the same radius of curvature, and a boss portion 52Bd on the lower side of the center portion is provided with an internal thread 52Be, and the lower outer casing 52A. And a fixing pin 54 provided with a male screw 54d and a flange 54f that are screwed into the female screw 52Be of the upper outer casing 52B. An attachment screw hole 52Aa for fixing to the vehicle body A is provided in the flange portion 52Af formed in the lower outer casing 52A. The outer ball 53 is formed with a flange portion 53f, and the flange portion 53f is provided with a mounting screw hole 53a for fixing to the vehicle body B. A recess 52Bg is formed in the central portion of the upper outer casing 52B, and a locking screw 5 is fitted into the recess 52Bg and screwed to the fixing pin 54, and the cover 7 is provided from above.

  FIG. 11A is a cross-sectional view of a state in which a spherical bearing 50 having the bearing structure of the fifth embodiment is attached to a streetcar, and FIG. 11B shows the bearing structure of the fourth embodiment. It is sectional drawing of the state which attached the spherical bearing 50 which has it to a streetcar, Comprising: It is a figure which shows the state which passes a vertical curve during driving | running | working. Also in the fifth embodiment, the state of attachment to the vehicle body and the behavior when the vehicle passes through the vertical curve are the same as described above, and the force received in the radial direction and the force received in the vertical direction can be considered separately.

DESCRIPTION OF SYMBOLS 1 Spherical bearing 2 Outer housing | casing 2a Car body installation screw hole 2b Cylindrical side wall 2c Inner side surface 2d Recess 2e Bottom face 2f Bottom hole 3 Outer ball 3a Car body installation screw hole 3b Convex spherical surface 3c Female screw hole 4 Fixing pin 4a Shaft body 4b Spherical surface Flange 4c Loosening screw hole 4d Male screw 5 Loosening screw 6, 7 Cover 20 Spherical bearing 22 Outer housing 22a Car body mounting screw hole 22c Inner surface 22d Recess 22e Bottom surface 22f Hole 23 Outer ball 23a Car body mounting screw hole 23c Hexagonal Square hole) 23d Recess 24 Fixing pin 24a Shaft portion 24b Spherical flange 24c Female thread hole 24d Hexagonal (polygonal) shaft section 30 Spherical bearing 32 Outer housing 33 Outer ball 34 Fixing screw 35 Retaining screw 35a Female thread hole for fixing screw
40 spherical bearing 42 outer casing 42c female screw 42e boss 43 outer ball 44 fixing pin 44d male thread 45 constraining block 45a arc-shaped block 45b rectangular block 45c convex 45d groove 50 spherical bearing 52A lower outer casing 52B upper outer casing 52Ab Cylindrical hole 52Af Flange part 53 Outer ball 53f Flange part 54 Fixing pin

Claims (8)

A vehicle body mounting screw hole is provided on the lower surface, the inner side surface of the cylindrical side wall is formed as a concave spherical inner peripheral surface, a concave portion is provided at the lower portion, and the bottom surface of the concave portion is formed into a convex spherical shape. An outer housing with holes, and
A car body mounting screw hole is provided on the upper surface, a convex spherical surface having the same radius of curvature as the concave spherical inner peripheral surface formed on the outer casing on the outer peripheral surface, and an outer ball having a female screw on the lower part,
A spherical flange is formed so that one of the shafts is in surface contact with the bottom surface of the recess provided in the outer housing, and a loosening screw hole is provided on the other end surface of the shaft, and the outer housing is formed. A fixing pin provided with a male screw to be screwed into a female screw provided in the outer ball through a hole drilled in a bottom surface of a recess provided in a lower part of the body;
A bearing structure comprising:   The bearing structure according to claim 1, wherein a concave portion is formed in an upper portion of the outer ball, and a loosening screw for screwing the outer ball and the fixing pin is provided in the concave portion.   The thick shaft has a spherical flange formed on one of the shafts. The other shaft of the fixing pin is a polygonal shaft portion, and the hexagonal shaft portion of the fixing pin is fitted on the lower surface of the outer ball. The bearing structure according to claim 1, wherein a (hexagonal) hole is provided.   An outer housing with a body mounting screw hole on the bottom surface and a concave spherical inner peripheral surface, and a body mounting screw hole on the top surface and a space around the center line, the same as the concave spherical inner peripheral surface A spherical outer ball having a convex spherical outer peripheral surface having a radius of curvature and a spherical contact with the spherical surface, a female screw hole for a fixing screw, and a concave spherical inner peripheral surface having the same radius of curvature as the inner peripheral surface of the outer ball. A bearing structure comprising: a stopper that is formed and comes into spherical contact with the surface on the upper side from the spherical center point of the outer ball; and a fixing screw that fixes the outer casing and the stopper near the periphery. The outer peripheral side wall has a concave spherical inner peripheral surface, and has an outer casing provided with an internal thread, and a screw hole for mounting a vehicle body on the upper surface, the same as the concave spherical inner peripheral face of the outer casing. An outer ball having a convex spherical outer peripheral surface having a radius of curvature and a concave spherical inner peripheral surface formed on the inner peripheral surface;
A fixing pin provided with a male thread that is formed at the upper part with a flange part and at the lower part with a female thread of the lower housing;
The outer ball comprises an arc-shaped block having an outer peripheral surface having the same curvature as the concave spherical inner peripheral surface, and a rectangular block having an outer peripheral surface having the same curvature, and a convex portion is provided on one side and the convex portion on the other. A constraining block that is provided with a recessed groove that fits into the portion, and is configured to be a donut-shaped ring as a whole,
Bearing structure. A fixing pin with a male thread on one side,
A concave spherical inner peripheral surface, a lower lower housing provided with a hole for fitting the fixing pin from below, and a convex spherical outer periphery having the same radius of curvature as the concave spherical inner peripheral surface of the lower outer housing An outer ball with a surface;
An upper outer housing provided with a concave spherical inner peripheral surface having the same radius of curvature as the convex spherical outer peripheral surface of the upper part of the outer ball, and a female screw to be screwed with a male screw of the fixing pin on the lower side of the center part;
Bearing structure.   The bearing according to claim 6, wherein the lower outer casing is provided with a flange portion provided with a screw hole attached to one vehicle body, and the outer ball is provided with a flange portion provided with a screw hole attached to the other vehicle body. Construction.   A boss portion provided with a female screw is formed at the center of the upper outer casing, and a male screw of a fixing pin is screwed together, and a locking screw is fitted from above and fixed to the female screw of the fixing pin. The bearing structure according to claim 6.

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