JPH0687130U - Railcar bogie axle box support - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a single plate spring type axle box supporting device for a bogie for a railway vehicle, which facilitates assembly / disassembly work. A leaf spring in which a fitting portion 10 having a trapezoidal cross section and inclined front and rear surfaces is projectingly provided at both side ends of a main body, and serrations are formed on upper and lower surfaces of the main body The leaf spring mounting seat 6 is formed by stacking the serration forming ends of the upper and lower leaf springs 7 on the upper and lower surfaces of the main body of the support fitting 8 and fastening them with fixing bolts 5 and 9, and projecting toward the center of the bogie frame.
In addition, the fitting groove 12 having a trapezoidal cross section with the front and rear facing surfaces being inclined surfaces
The left and right pairs are installed side by side, the fitting portion 10 of the leaf spring support fitting 6 is fitted in the fitting groove 12, and mounting bolts penetrating each fitting portion are screwed to the bottom of the fitting groove for assembly. [Effect] Assembly / disassembly work can be easily performed without using a load device, with workability equivalent to that of a shaft beam type axle box support device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement for facilitating the assembling / disassembling work of a single leaf spring type axle box supporting device in a bogie for railway vehicles.

[0002]

[Prior art]

 The axle box that contains the bearings that support both ends of the wheel axle of a bogie for rail cars holds back and forth movement, has a margin to relieve lateral pressure in the left and right directions, and activates a cushioning action in the up and down directions. It is supported by a shaft box device constructed as described above. There are various types of axle box support devices such as an axle box guard type, an axial beam type, a leaf spring type, a link arm type, and a rubber type.

Among the leaf spring methods, the single leaf spring type axle box supporting device has a structure in which one side of the axle box and a portion near the center of the bogie frame are connected by two leaf springs above and below.

For example, the S-type Minden type axle box supporting device shown in FIG. The upper and lower parallel leaf springs 21 are provided between the leaf spring mounting seats 19 and 19, and the serration portions 22 provided at both ends of the leaf springs 21 are respectively provided on the serration portions provided on the leaf spring mounting seats 17 and 20. The leaf springs 21 and the leaf spring mounting seats 17 and 20 are fixed by a bolt 23 penetrating the leaf springs 21 and 20.

Assembling / disassembling work of the above-mentioned single leaf spring type axle box supporting device is performed by arranging each member such as the axle box, the axial spring, and the leaf spring in a predetermined position on the assembling device. At this time, a gate-type loading device having a pressing force of about 10 tons is used to apply a load to the core plate of the bogie frame, and the axial springs are compressed until the two upper and lower leaf springs are horizontal. A right and left positioning jig is required, and the work is complicated and takes a lot of work.

[0006]

[Problems to be solved by the device]

 As mentioned above, the conventional single-disc spring type axle box support device is complicated and requires a lot of work, so these days, a load device is not required for assembly / disassembly, and the assembly / disassembly work is simple. However, for example, the axial beam type and cylindrical rubber type have been adopted.

In view of the above situation, the present invention has a workability equivalent to that of an axial beam type axle box support device without requiring a load device, and is a single plate spring type axle box support device that is easy to assemble and disassemble. Is provided.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, a single leaf spring type axle box supporting device of the present invention is a piece in which one side of an axle box of a railcar for both rolling stock and the center of the bogie frame are connected by upper and lower strip-shaped leaf springs. In the leaf spring type axle box support device, the upper and lower surfaces of the body of the leaf spring supporting metal fittings with trapezoidal cross-sections with front and rear inclined surfaces are provided at both ends of the main body and serrations are formed on the upper and lower surfaces. The serration formation ends of the upper and lower leaf springs are overlapped with each other and fastened with a fixed bolt, and the leaf spring mounting seat protruding near the center of the bogie frame is fitted with a trapezoidal cross section with the front and rear facing surfaces as inclined surfaces. A pair of right and left are installed side by side, the fitting portion of the leaf spring support fitting is fitted in the fitting groove, and a mounting bolt penetrating each fitting portion is screwed to the bottom of the fitting groove for assembly.

[0009]

[Action]

 The single-disc spring type axle box support device of the present invention assembles leaf springs by passing two leaf springs above and below between the leaf spring support fitting on the axle box side and the leaf spring support fitting near the center of the bogie frame. The first step is to separately install the leaf spring support fitting near the center of the bogie frame to the leaf spring mounting seat of the bogie frame and the second step to install the shaft spring between the axle box and the bogie frame end. .

Then, in the second step, about 20 to 30 in a state where the fitting portion of the leaf spring support fitting on the side closer to the center of the bogie frame is fitted in the fitting groove of the leaf spring mounting seat of the bogie frame in a state where the axial spring is not loaded. It is hooked at a depth of mm, and the assembly bolt is inserted through the fitting part and screwed into the bottom of the fitting groove for assembly.

Therefore, it is not necessary to apply a load to the axial spring until the upper and lower leaf springs are horizontal by the gate type load device or the like, and the assembling / disassembling work can be facilitated.

[0012]

【Example】

 An embodiment of this invention will be described with reference to FIGS. As shown in FIG. 3, the leaf spring support metal fitting 8 to be attached to the leaf spring attachment seat 6 projecting near the center of the bogie frame 1 is a cylinder having a vertically oriented center line, and has a bolt hole 8b at the center and upper and lower surfaces. On the circumferential diameter line of the main body 8a provided with the serrations 13, the front and rear surfaces of the trapezoidal cross section are inclined surfaces 11a, and the fitting portions 10 with the bolt holes 10a formed vertically are provided opposite to each other.

Before the shaft is inserted, first, two leaf springs 7 are provided between the leaf spring support fitting 4 projecting inside the axle box 3 and the leaf spring support fitting 8 near the center of the bogie frame. Assemble the serration formation end of the above with the serration formation upper and lower surfaces of the support fitting and fasten them with the fixing bolts 5 and 9.

On the other hand, the leaf spring mounting seat 6 projecting toward the center of the bogie frame 1 is provided with an inclined front and rear surface for assembling the pair of fitting portions 10 of the leaf spring support metal fitting 8 at the downward end thereof. A pair of trapezoidal fitting grooves 12 of 11 b are provided, and a screw hole 12 a for screwing the mounting bolt 14 is provided on the bottom of the groove.

As described above, the front and rear wheel axles are placed at predetermined positions with the upper and lower leaf springs 7 attached to the leaf spring support fitting 4 and the leaf spring support fitting 8 of the axle box 3. Fit the fitting portion 10 of the leaf spring support metal fitting 8 into the fitting groove 12 of the leaf spring mounting seat 6 of the bogie frame 1, and incorporate the shaft spring 2 between the axle box 3 and the bogie frame end to form a bogie. Combine the frame 1 with the axle box support device. Then, the mounting bolt 14 is passed through the bolt hole 10a of the fitting portion 10 of each leaf spring support fitting 8 and screwed into the screw hole 12a at the groove bottom of the leaf spring mounting seat 6 to complete the assembly. 15 is a wheel.

[0016]

[Effect of device]

 According to this invention, the assembling / disassembling work of the single-disc spring type axle box supporting device can be easily performed with the same workability as that of the axial beam type axle box supporting device, without the need for a load device.

[Brief description of drawings]

FIG. 1 is a front view of a single leaf spring type axle box supporting device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged perspective view showing the leaf spring support fitting on the side closer to the center of the bogie frame in the single leaf spring type axle box supporting device of the present invention in a developed state in relation to the leaf spring mounting seat.

FIG. 4 is a front view of a conventional single-disc spring type axle box supporting device.

[Explanation of symbols]

 1 Bogie frame 2 Axle spring 3 Axle box 4 Leaf spring support fitting 5, 9 Fixing bolt 6 Leaf spring mounting seat 7 Leaf spring 8 Leaf spring support fitting 8a Main body 8b Bolt hole 10 Fitting portion 10a Bolt hole 11a, 11b Inclined surface 12 Fitting groove 12a Screw hole 13 Serration 14 Mounting bolt 15 Wheel 16 Bogie frame 17,20 Leaf spring mounting seat 18 Shaft spring 19 Shaft box 21 Leaf spring 22 Serration portion 23 Bolt

Claims (1)

[Scope of utility model registration request] 1. A single plate spring type axle box support device in which one side of an axle box of a bogie for a railroad vehicle and a portion near the center of the bogie frame are connected by two strip-shaped leaf springs, one in the front and the other in a trapezoidal cross section. Fitting parts with inclined surfaces projecting from both sides of the main body, and serration forming ends of the upper and lower leaf springs are stacked on the upper and lower surfaces of the body of the leaf spring support metal with serrations formed on the upper and lower surfaces of the body to form a fixing bolt. A pair of fitting grooves having a trapezoidal cross-section with the front and rear facing surfaces being inclined surfaces are installed on the left and right sides of the plate spring mounting seat that is fastened together and protrudes toward the center of the bogie frame, and the above-mentioned plate is fitted in the fitting groove. An axle box support device for a bogie for a railway vehicle, which is assembled by fitting a fitting portion of a spring support fitting and screwing a mounting bolt penetrating each fitting portion to a fitting groove bottom.