JPH0592038U - Bolsterless trolley - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve ride comfort by eliminating vibration and noise between the center pin of the bolsterless bogie equipped with the Z-link mechanism and the joint between the bogie, and to facilitate maintenance. [Structure] A center pin holding cylinder 6 is formed by closely vulcanizing a rubber layer 9 between an outer cylinder 7 and an inner cylinder 8, and the outer cylinder 7 is provided at the center of the tow beam 2 of the Z link mechanism 1. The inner cylinder 8 is detachably fixed to the outer periphery of the center pin 11 while being fixed to the pin hole 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bolsterless bogie having a Z-link mechanism, and more particularly, to a structure of a joint portion between a vehicle body and a bogie.

[0002]

[Prior Art]

 In this type of bolsterless bogie, the center pin on the vehicle body side is inserted into the center pin hole of the centering device provided in the tow beam that constitutes the Z-link mechanism, and the body and bogie are joined together. The swinging of the bogie accompanying the above is performed by sliding members such as a cushioning rubber, a center pin bush, and a mandrel bush incorporated between the Z-link mechanism or the mandrel device and the center pin.

[0003]

[Problems to be solved by the device]

 However, in the above structure, an appropriate gap is provided in the sliding part in order to slide between the center pin and the mandrel.However, this gap causes vibration and noise during driving, which reduces the riding comfort. There is. In addition, since the sliding parts wear out, the squeak noise further increases, and these sliding parts must be replaced after every certain running distance.In addition, parts replacement work requires rusting of the center pin and the core device. Due to factors such as the difficulty of disassembling, it took a lot of time and effort for maintenance.

Therefore, an object of the present invention is to provide a bolsterless bogie that is easy to maintain, while eliminating vibrations and noise generated at the bogie connecting portion of the center pin during traveling.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention is a bolsterless bogie in which a center pin on the vehicle body side is inserted into a center pin hole provided in a tow beam that constitutes a Z-link mechanism. A center pin holding cylinder having a rubber layer adhered and vulcanized is formed between the inner cylinder and the inner cylinder. In the second invention, the outer race of the rolling bearing is fixedly attached to the center pin hole, and the inner race of the rolling bearing is detachably fixed to the outer periphery of the center pin. It is characterized by doing.

[0006]

[Work]

 Therefore, in the structure of the first invention, the rotation of the carriage is caused by the bending of the rubber layer interposed between the inner cylinder fixed to the outer periphery of the center pin and the outer cylinder fixed to the tow beam. Further, in the configuration of the second invention, since the rotation of the bogie is performed by the rolling element arranged between the inner race and the outer race, the connecting portion between the center pin and the tow beam does not slide. No vibration or sound is generated, and there is no wear due to sliding.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention, in which a Z-link mechanism 1 of a bolsterless truck has a tow beam 2 arranged in the width direction, as shown in FIG. A center pin provided at the center of the tow beam 2 and composed of a first link 3 extending from the left side of the tow beam 2 in the figure and a second link 4 extending from the right side of the tow beam 2 in the figure. A center pin holding cylinder 6 is provided in the hole 5.

The center pin holding cylinder 6 is formed by closely vulcanizing a rubber layer 9 between a metal outer cylinder 7 and an inner cylinder 8, and the outer cylinder 7 is press-fitted into the center pin hole 5 for fixation. There is.

The inner cylinder 8 is formed so that its inner diameter is slightly smaller than the outer diameter of the center pin 11 suspended from the vehicle body 10, about 1 mm in this embodiment, and the upper end surface 8 a is directed downward toward the inner circumference. The lower end surface 8b is formed on the taper surface that is inclined toward the upper side and the taper surface that is inclined toward the upper inner side.

The center pin 11 is a taper in which a lower end surface 12 a of a ring-shaped upper head metal 12 which is press-fitted and fixed to the upper portion is inclined from the outer side toward the lower inner periphery in correspondence with the upper end surface 8 a of the inner cylinder 8. The center pin 11 is inserted into the inner cylinder 8 so that the upper end surface 12a of the upper head metal 12 contacts the upper end surface 8a of the inner cylinder 8.

Further, a ring-shaped lower head metal 15 is provided on the abnormal rise stopper 14 which is fixed to the lower end of the center pin 11 with a bolt 13.

The lower heddle metal 15 has a ring shape with a part cut off, and its upper end surface 15a corresponds to the lower end surface 8b of the inner cylinder 8 and has a tapered surface inclined from the outer side toward the inner peripheral upper side. The slit portion 15b formed and separated is engaged with a stopper fitting 14a fixed to the abnormal rise stopper 14 to prevent rotation.

Therefore, when the center pin 11 is inserted into the inner cylinder 8, the lower end surface 12a of the upper heddle metal 12 comes into contact with the upper end surface 8a of the inner cylinder 8, and the center pin 11 protruding from the lower portion of the inner cylinder 8 is inserted. When the abnormal rise stopper 14 is fixed to the lower end with the bolt 13 and the bolt 13 is tightened, the lower heddle metal 15 is pushed up and its upper end surface 15a abuts on the lower end surface 8b of the inner cylinder 8. As the bolt 13 is tightened up, the lower end surface 12a of the upper sloping metal 12 and the upper end surface 15a of the lower sloping metal 15 hold the upper end surface 8a and the lower end surface 8b of the inner cylinder 8 so that the inner cylinder 8 moves. It is fixed to the outer periphery of the center pin 11.

Reinforcing rings 16 and 17 are provided on the upper and lower outer peripheries of the inner cylinder 8 to prevent the inner cylinder 8 from bulging due to the tightening of the upper and lower heddle metal members 12 and 15. The reinforcing ring 17 is engaged with the stopper fitting 14a and is prevented from rotating.

With such a configuration, the rotation of the carriage is performed by the inner cylinder 8 fixed on the outer periphery of the center pin 11 and the outer cylinder 7 fixed on the tow beam 2 of the Z link mechanism 1. This is performed by bending the rubber layer 9 interposed between the two. Therefore, since the center pin 11 and the center pin holding cylinder 6 do not slide, vibration and noise are not generated, and there is no wear due to sliding.

When the center pin 11 is pulled out, the bolt 13 is pulled out to remove the abnormal rise stopper 14 and the lower head metal 15, and when the vehicle body 10 is lifted, the center pin 11 is pulled out, which facilitates maintenance. it can.

Furthermore, since there is a slight gap between the outer periphery of the center pin 11 and the inner cylinder 8 and the outer periphery of the center pin 11 can be painted, the center pin 11 and the inner cylinder 8 will not rust, It becomes easy to attach and detach the center pin 11.

In FIG. 4, a tapered surface 20 a that abuts on the upper end surface 8 a of the inner cylinder 8 is formed on the outer periphery of the upper portion of the center pin 20, and a taper that abuts on the lower end surface 8 b of the inner cylinder 8 is formed on the upper surface of the abnormal rise stopper 21. The ring portion 21b having the surface 21a is fixed, and the tapered surface 20a and the tapered surface 21a sandwich the upper end surface 8a and the lower end surface 8b of the inner cylinder 8 to fix the inner cylinder 8 to the outer periphery of the center pin 20. The second embodiment of the present invention will be described below. The same operations and effects as those of the first embodiment are achieved.

FIG. 5 shows a third embodiment of the present invention in which a pair of upper and lower rolling bearings 32, 32 are arranged between the center pin 30 and the center pin hole 31, and the rolling bearing 32 is Two rows of rollers 32c are interposed between an inner race 32a having an inner diameter slightly larger than the outer diameter of the pin 30 and an outer race 32b. Between the upper and lower bearings 32, 32, An inner spacer ring 33a having the same inner diameter as the inner race 32a is arranged between the inner races 32a, 32a, and an outer spacer ring 33b having the same outer diameter as the outer race 32b is arranged between the upper and lower outer races 32b, 32b. It is set up.

In the rolling bearings 32 and 32, the outer races 32b and 32b and the outer spacer ring 33b are fixed to the center pin hole 31, and the center pin 30 is inserted into the inner races 32a and 32a and the inner spacer ring 33a from above. The inner race is composed of a ring-shaped upper heddle metal 34 which is press-fitted and fixed to the upper portion of the center pin 30, and a ring-shaped lower heddle metal 37 of an abnormal rise stopper 36 which is fixed to the lower end of the center pin 30 with a bolt 35. The inner spacer ring 33a is held between 32a, 32a and is detachably fixed to the outer periphery of the center pin 30.

With this structure, the trolley is rotated by the rolling of the roller 32c. Therefore, since the center pin 30 and the center pin hole 31 do not slide, vibration and noise are not generated, and there is no wear due to sliding.

When the center pin 30 is pulled out, the bolt 35 is pulled out, the abnormal rise stopper 36 and the lower head metal 37 are removed, and the center pin 30 is pulled out by lifting the vehicle body, so that maintenance can be facilitated.

Further, since there is a slight gap between the center pin 30, the inner races 32a, 32a, and the inner spacer ring 33a, the outer periphery of the center pin 30 can be painted, and the center pin 30 and the inner races 32a, 32a can be painted. Since the inner spacer ring 33a does not rust, the center pin 30 can be easily attached and detached.

[0025]

[Effect of the device]

 As described above, according to the first aspect of the present invention, in the first aspect, the center pin holding formed by closely vulcanizing the rubber layer between the outer cylinder and the inner cylinder is formed in the center pin hole provided in the pulling beam of the Z link mechanism. Since the outer cylinder of the cylinder is fixed and the inner cylinder is detachably fixed to the outer circumference of the center pin, the rotation of the carriage is performed by the bending of the rubber layer interposed between the inner cylinder and the outer cylinder. ..

Therefore, since the center pin and the center pin holding cylinder do not slide, there is no generation of vibration or noise, and there is no wear due to sliding, so that the riding comfort is not impaired, and maintenance work such as parts replacement is troublesome. It doesn't cost.

In the second invention, the outer race of the rolling bearing is fixed to the center pin hole, and the inner race of the rolling bearing is detachably fixed to the outer periphery of the center pin. Since the movement is performed by the rolling elements arranged between the inner race and the outer race, the joint between the center pin and the traction beam does not slide, so there is no noise and no wear of the parts due to sliding, and No maintenance such as parts replacement is required.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of a Z link mechanism showing a first embodiment.

[FIG. 2] Similarly, a cross-sectional view around the center pin

FIG. 3 is a plan view of the Z link mechanism.

FIG. 4 is a sectional view around a center pin showing a second embodiment.

FIG. 5 is a sectional view around a center pin showing a third embodiment.

[Explanation of symbols]

1 ... Z link mechanism, 2 ... Traction beam, 3 ... First link, 4 ...
2nd link, 5,31 ... center pin hole, 6 ... center pin holding cylinder, 7 ... outer cylinder, 8 ... inner cylinder, 9 ... rubber layer, 11, 20, 3
0 ... center pin, 32 ... rolling bearing, 32a ... inner race, 32b ... outer race

Claims (2)

[Scope of utility model registration request] 1. In a bolsterless carriage in which a center pin on the vehicle body side is inserted into a center pin hole provided in a tow beam that constitutes a Z-link mechanism, a rubber layer is closely attached between an outer cylinder and an inner cylinder made of metal. A bolsterless cart, wherein a sulfurized center pin holding cylinder is formed, an outer cylinder of the center pin holding cylinder is fixed to the center pin hole, and an inner cylinder is detachably fixed to the outer periphery of the center pin. .. 2. In a bolsterless bogie in which a center pin on the vehicle body side is inserted into a center pin hole provided in a tow beam that constitutes a Z link mechanism, an outer race of a rolling bearing is fixedly provided in the center pin hole. A bolsterless bogie, wherein an inner race of a rolling bearing is detachably fixed to the outer periphery of the center pin.