Sub-frame radial bogie

Abstract

A sub-frame radial bogie comprises wheelsets, a side frame, a swing bolster, a wheelset radial device and a brake gear. Bearing adapters (41) forming the wheelset radial device are fixedly connected with the sub-frame (42) via pulling rivets (11), and each group of the bearing adapters (41) is bilaterally symmetrical in structure with a symmetry plane (A). The sub-frame (42) comprises an arm (51) and an end (52); a sub-frame connection hole (61) is arranged on the end (52); transverse positioning bosses (73) are arranged on the bearing adapters (41); and an arc groove (75) and symmetrical sub-frame connection holes (71) are arranged on a connection base (72). The bearing adapters use the same standard structure, hence, the more precise design and machining can be realized, and the cost is reduced, and meanwhile, the maintenance technique of the sub-frame is improved, and the maintenance cost is reduced.

Claims

1. A sub-frame radial bogie, comprising a set of four wheels, a side frame, a swing bolster, a wheel set radial device, and a brake gear, wherein the wheel set radial device comprises a pair of sub-frames, four bearing adapters, each configured to be mounted on a bearing of one of the four wheels, and a pair of connecting rods connecting the pair of sub-frames (12), and each sub-frame is fixedly connected with two of the bearing adapters by rivets, and wherein each sub-frame comprises an arm and an end, and the end has two sub-frame connection holes for riveting one bearing adapter, wherein the bearing adapter comprises a connecting base having a horizontal surface for receiving the end of the arm and a transverse positioning boss propped against a lateral surface of the end.

2. The sub-frame radial bogie according to claim 1, wherein the four adaptors have a same structure.

3. The sub-frame radial bogie according to claim 1, wherein the connecting base is provided with an arc groove on the side of the connecting base facing the wheel bearing, and comprises two adapter connection holes for riveting the end of the sub-frame.

4. The sub-frame radial bogie according to claim 3, wherein the sub-frame is connected with the connecting rod by a round pin.

5. The sub-frame radial bogie according to claim 3, wherein the brake gear comprises a brake lever, a lower pull rod and a brake beam, and the central plane of the brake lever coincides with longitudinal plane of symmetry of the sub-frame radial bogie, wherein the brake lever has two pieces of levers welded together.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural diagram of the wheelset radial device of the invention arranged at the wheelset;

(2) FIG. 2 is a structural diagram of the bogie of the invention;

(3) FIG. 3 is a structural diagram of the sub-frame of the invention;

(4) FIG. 4 is a partial structural diagram of the end of the sub-frame of the invention;

(5) FIG. 5 is a structural diagram of the adapter of the invention;

(6) FIG. 6 is a structural diagram of the adapter of the invention in another direction;

(7) FIG. 7 is a partial structural diagram of the wheelset radial device of the invention;

(8) FIG. 8 is a structural diagram of the brake gear of the invention;

(9) FIG. 9 is a structural diagram of the wheelset radial mechanism in the sub-frame radial bogie of the prior art;

(10) FIG. 10 is a structural diagram of the sub-frame in the sub-frame radial bogie of the prior art.

(11) In the figures, 11 represents the pulling rivet, 12 represents the connecting rod, 13 represents the round pin, 21 represents sub-frame adapter of the prior art, 22 represents sub-frame of the prior art, 41 represents the adapter, 42 represents the sub-frame, 51 represents the arm, 52 represents the end, 61 represents the sub-frame connection hole, 71 represents the adapter connection hole, 72 represents the connecting base, 73 represents the positioning boss, 75 represents the arc groove, 81 represents the brake beam, 82 represents the brake lever, 83 represents the lower pull rod and A represents the symmetry plane.

DESCRIPTION OF THE PREFERRED EMBODIMENT

(12) In order to make the object, technical solution and advantages of the invention more clear, the technical solution of the invention will be described clearly and completely in combination with accompanying drawings and examples. Obviously, the examples described herein are only part of examples of the invention rather than all examples. Based on the examples of the invention, all other examples obtained by those of ordinary skill in the art without creative work fall within the protection scope of the invention.

(13) FIG. 1 is a structural diagram of the wheelset radial device of the invention arranged at the wheelset, FIG. 2 is a structural diagram of the bogie of the invention, FIG. 3 is a structural diagram of the sub-frame of the invention, FIG. 4 is a partial structural diagram of the end of the sub-frame of the invention, FIG. 5 is a structural diagram of the adapter of the invention, FIG. 6 is a structural diagram of the adapter of the invention in another direction, and FIG. 7 is a partial structural diagram of the wheelset radial device of the invention.

(14) In FIG. 1, two sub-frames 42 are connected with two crossed connecting rods 12 by round pins 13 at arms 51 of the sub-frames 42.

(15) FIG. 2 comprises a wheelset, a side frame, a swing bolster, a wheelset radical device and a brake gear.

(16) FIG. 3 and FIG. 4 show structure of the sub-frame 42 of the invention. The sub-frame 42 comprising the arm 51 and two ends 52, and is separately cast from the adapter of the sub-frame, which greatly reduces the technical difficulty of casting, improves casting precision, improves quality and precision of the wheelset radial device as a whole and reduces manufacturing cost. The end 52 comprises two sub-frame connection holes 61 for riveting the adapter 41.

(17) FIG. 5 and FIG. 6 show the adapter 41 separately cast after disassembly. In the invention, the adapter 41 is designed as a structure symmetrical on a center symmetry plane A, and the structure unifies the adapters of the sub-frames of the wheelset radial device, which reduces design and manufacturing cost, facilitates standardized production, and improves efficiency and product quality. As shown in the figure, the adapter 41 has a connecting base 72 and a transverse positioning boss 73 for riveting the sub-frame 42, the connecting base 72 is provided with an arc groove 75 on the bottom plane thereof, the arc groove 75 can provide adequate clearance between the connecting base 72 of the adapter 41 and the bearing backstop after the bogie is installed and used, thus ensuring use safety of the bogie. The adapter 41 also comprises two adapter connection holes 71 for riveting the sub-frame 42, the two adapter connection holes 71 are symmetrically arranged at both sides of the symmetry plane A of the adapter 41, and the adapter connection holes 71 arranged symmetrically allow the adapter to adapt to four positions of the wheelset radial device.

(18) FIG. 7 is a fixed structure for connecting the sub-frame 42 and the adapter 41. In the invention, the sub-frame is solidly connected with the adapter 41 by the pulling rivets 11 so that the adapter 41 can be disassembled conveniently when the adapter 41 reaches wear limit. The positioning boss 73 on the adapter 41 has good positioning action and is convenient and favorable for improving structure precision.

(19) The invention is as shown in FIG. 1 to FIG. 8.

(20) The example of the invention provides a sub-frame radial bogie, comprising a wheelset, a side frame, a swing bolster, a wheelset radical device and a brake gear. The wheelset radial device comprises a sub-frame 42, adapters 41, a connecting rod 12, pulling rivets 11 and a round pin 13, the sub-frame 42 is connected with the adapters 41 by pulling rivets, and the sub-frame 42 is connected with the connecting rod 12 by a round pin.

(21) For the sub-frame 42, the integrated cast structure of the adapter and arm is cancelled; instead, the sub-frame 41 and the adapter 42 are separately cast and then subject to rivet connection, thus reducing weight of the wheelset radial device, improving manufacturing, repair manufacturability and precision of the sub-frame, and reducing manufacturing and maintenance cost of the bogie.

(22) The sub-frame 42 comprises an arm 51 and an end 52, and the end 52 of the sub-frame further comprises two first sub-frame connection holes 61 for riveting the adapter 41.

(23) The adapter 41 is cast with a connecting base 72 and a transverse positioning boss 73 for riveting the sub-frame 42.

(24) The connecting base 72 is provided with an arc groove 75 on the bottom plane thereof, which provides adequate clearance between the connecting base of the adapter and the bearing backstop after the bogie is installed and used, thus ensuring use safety of the bogie. The connecting base 72 also comprises two adapter connection holes 71 for riveting the sub-frame 42, which are symmetrically arranged at both sides of the center symmetry plane A of the adapter surface.

(25) For the bogie in the examples of the invention, when the sub-frame 42 is riveted with the adapter 41, the horizontal plane of the connecting base 72 of the adapter 41 is adapted to the bottom surface of the end of the sub-frame 42, then the transverse positioning boss 73 of the adapter 41 is propped against the lateral surface of the end 52 of the sub-frame 42 to align the sub-frame connection hole 61 with the adapter connection hole 71, through which the pulling rivets can pass for fastening. After the sub-frame 42 is riveted with the adapter 41, the connecting line of two sub-frame connection holes 61 is parallel to longitudinal center line of the side frame, and two holes are symmetrical about the center line of the axle. In order to ensure dimensional precision after the sub-frame 42 is riveted with the adapter 41, preferably diameter size of all connection holes is 1 mm-1.5 mm larger than that of the pulling rivets.

(26) As shown in FIG. 8, for the bogie in the example, the brake gear preferably comprises a brake lever 82, a lower pull rod 83 and a brake beam 81, and the central plane of the brake lever 82 coincides with longitudinal plane of symmetry of the car body.

(27) For the bogie in the example of the invention, two pieces of levers are welded as a whole to form the brake lever 82.

(28) The sub-frame radial bogie of the invention solves the problems of large deadweight of the sub-frame, high machining precision, large processing difficulty, low production efficiency and high manufacturing cost. Thus, manufacturing quality thereof can be controlled easily. The sub-frame is connected with the adapter by pulling rivets, so that the adapter can be simply disassembled and replaced when the adapter reaches wear limit, which improves the manufacturing and repair manufacturability of the sub-frame, and reduces manufacturing and maintenance cost of the bogie.

(29) FIG. 9 is a structural diagram of the wheelset radial mechanism in the sub-frame radial bogie of the prior art, and FIG. 10 is a structural diagram of the sub-frame in the sub-frame radial bogie of the prior art. As shown in the figures, the wheelset radial mechanism in the sub-frame radial bogie of the prior art is machined after integrated casting. The sub-frame adapter 21 is an asymmetric structure.

(30) It should be understood that the examples above are only considered to be illustrative for the technical solution of the invention instead of limitation thereto. Although the invention is described in detail in combination with the examples, those of ordinary skill in the art shall understand that they still can modify technical solutions documented in the examples or perform equivalent replacement on some technical features, but such modifications or replacements shall not allow the nature of corresponding technical solutions to depart from spirit and scope of the invention.