CN210337918U - Narrow gauge vehicle bogie and framework thereof - Google Patents

Abstract

The utility model discloses a narrow gauge vehicle bogie and framework thereof. The framework comprises a frame and various mounting seats welded on the frame; the frame comprises two side beams, a cross beam and an end beam which are connected between the two side beams; the side beams, the cross beams and the end beams are all box-shaped beams; the structure is characterized in that: each side beam is mainly formed by connecting an upper cover plate, a lower cover plate, two longitudinal vertical plates and at least one longitudinal rib plate; each cross beam is mainly formed by connecting an upper cover plate, a lower cover plate, two transverse vertical plates and at least one middle transverse rib plate; each end beam is mainly formed by connecting an upper cover plate, a lower cover plate, two transverse vertical plates and at least one end transverse rib plate. The utility model discloses a framework intensity is high, and with low costs, especially is fit for the framework as narrow gauge bogie.

Description

Narrow gauge vehicle bogie and framework thereof

Technical Field

The utility model relates to a narrow gauge vehicle bogie and framework thereof belongs to the track traffic field.

Background

At present, the railway operation mileage of China exceeds 13 kilometers, wherein the vast majority of China is mainly standard rail gauge of 1435mm, and narrow-gauge operation routes to a certain extent exist in Yunnan, northeast, Taiwan, southeast Asia countries, African countries and the like of China, and particularly for narrow-gauge passenger routes of Taiwan Alishan sightseeing railways, African narrow-gauge passenger routes and the like, the narrow-gauge vehicles are required to have the characteristics of safety, stability, reliability and low manufacturing cost, and meanwhile, higher requirements are provided for passenger comfort of the narrow-gauge vehicles.

At present, the vehicle that the gauge is no longer than 762mm mainly applies to forest railway, colliery transportation line, and still very deficient to this scope narrow gauge passenger stock's research, how to design one kind have high reliability, security, stability, maintainability and have good passenger's travelling comfort, with low costs narrow gauge vehicle, be urgent problem of waiting to solve, this patent is exactly that propose under such background.

CN104334435B discloses a bogie frame for railway vehicles, which has a pair of side members distributed on the left and right sides, a cross member connecting the side members, the cross member being composed of a top plate member, a bottom plate member, and a pair of side plate members, and a motor mount, a gear box mount, and various types of brackets are welded thereto.

CN201116124Y discloses a power bogie framework for low floor light rail vehicle, this framework's curb girder and crossbeam be the box structure, and the end beam hangs on the curb girder through elasticity stage, and curb girder and crossbeam are roof beam body butt joint assembly welding structure.

CN 203580969U discloses a narrow-gauge bogie, which comprises a front wheel pair, a rear wheel pair, a side frame, a swing bolster, a brake device, a lower center plate and a side bearing, wherein wear plates are arranged on the splayed surface of the swing bolster and the upright post part of the side frame, the wear plates of the upright post of the side frame are fastened with the upright post of the side frame through a folding head bolt, a clamping type chute wear plate is arranged in the chute of the side frame, the swing bolster and the lower center plate are of an integrated casting structure, and the wear plates of the center plate are pressed in the lower center plate; the spring damping device consists of a wedge, a side frame upright post wearing plate, an inclined plane wearing plate and a double-roll damping spring, wherein the wedge is a combined wedge consisting of a wedge body and a main friction plate; the side bearing adopts a double-acting normally-contacted elastic side bearing, and the braking device adopts a lower pull rod or middle pull rod type structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a narrow gauge vehicle bogie and framework thereof, this framework intensity is high, and with low costs, is particularly suitable for the bogie framework as the narrow gauge vehicle. The narrow-gauge vehicle bogie has high reliability, safety, stability, maintainability and excellent passenger comfort.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a bogie frame comprises a frame and various mounting seats welded on the frame;

the frame comprises two side beams, a cross beam and an end beam which are connected between the two side beams;

the side beams, the cross beams and the end beams are all box-shaped beams; the structure is characterized in that: each side beam is mainly formed by connecting an upper cover plate, a lower cover plate, two longitudinal vertical plates and at least one longitudinal rib plate;

each cross beam is mainly formed by connecting an upper cover plate, a lower cover plate, two transverse vertical plates and at least one middle transverse rib plate;

each end beam is mainly formed by connecting an upper cover plate, a lower cover plate, two transverse vertical plates and at least one end transverse rib plate.

Therefore, the utility model discloses a framework is at first assembly welding apron, horizontal riser, vertical riser, the horizontal gusset of tip, middle horizontal gusset, vertical gusset down, thereby the welding upper cover plate forms integrative frame construction, uses frame construction as the basis at last, welds various mount pads on the frame.

According to the utility model discloses an embodiment, can also be right the utility model discloses do further optimization, following for optimizing the technical scheme who forms afterwards:

preferably, the number of the end beams is two, and the number of the cross beams is one; the frame is in a shape of Chinese character ri in a whole in a top view.

According to the utility model discloses a preferred embodiment, various types of mount pads include horizontal bumper shock absorber mount pad, and the mount pad is hung to the gear box, heart dish mount pad, vertical bumper shock absorber mount pad, two series spring mount pads, rotatory backstop seat, the stopper mount pad, tip axle box pull rod mount pad, one series spring mounting panel, middle axle box pull rod mount pad, motor mount pad.

Based on the same invention concept, the utility model also provides a narrow gauge vehicle bogie, it includes the bogie framework.

The narrow-gauge vehicle bogie comprises brakes arranged at two end parts of a framework, a center plate arranged in the middle of a beam of the framework, and a gear box suspender, a gear box, a traction motor, a primary suspension device, a secondary suspension device, an axle box device and a wheel pair which are arranged on the framework; the traction motor is arranged on a motor mounting seat at the bottom of the frame and adopts a shaft-embracing type structure, the traction motor is connected with a gear box through a coupling, and the gear box is arranged on the bogie frame through a gear box suspender.

In order to guarantee that bogie primary suspension mounting structure, secondary suspension mounting structure are compact, primary suspension device includes vertical bumper shock absorber, a spring and axle box pull rod, and wherein axle box pull rod symmetry sets up the left and right sides at the framework, and the unilateral adopts two pull rod structures, wherein the both ends of framework unilateral all are equipped with tip axle box pull rod mount pad, and the middle part of framework unilateral is equipped with middle axle box pull rod mount pad, two of unilateral axle box device is connected between middle axle box pull rod mount pad and the tip axle box pull rod mount pad that corresponds through corresponding axle box pull rod respectively.

In order to solve the problems that the narrow-gauge bogie wheel pair inner side distance and the small wheel pair diameter are influenced, and the mounting space at the bottom of the bogie is limited, the axle box device comprises two axle box bodies, two axle box supports and two axle box end covers, wherein the two axle box bodies are arranged at two ends of an axle; the front end and the rear end of the shaft box body are respectively provided with a series of spring mounting interfaces, a series of springs are mounted between the two first series of spring mounting interfaces and a first series of spring mounting seats mounted on the framework, and the two first series of spring mounting interfaces form a height difference; the front end of the axle box body is provided with a protruding part, the protruding part is provided with a first axle box pull rod mounting interface, and the lower part of the rear end of the axle box body is provided with a second axle box pull rod mounting interface; the first axle box pull rod mounting interface at the front end of the axle box body is connected with the end part axle box pull rod mounting seat through an axle box pull rod, and the second axle box pull rod mounting interface at the rear end of the axle box body is connected with the middle axle box pull rod mounting seat through an axle box pull rod.

In order to support the axle box conveniently, the axle box support is provided with an axle mounting hole, a bearing mounting interface is arranged in the axle mounting hole, and the top of the axle box support is provided with a vertical shock absorber mounting interface.

In order to improve the shock absorption and the curve passing capacity of the bogie, the primary springs are symmetrically arranged on the left side and the right side of the framework, and two groups of primary springs are arranged between each axle box device and the framework, wherein the position of the primary spring close to the center of the framework is higher than that of the primary spring away from the center of the framework to form a height difference; and/or the secondary suspension device comprises a sliding bearing, a secondary rubber stacking spring and a transverse shock absorber; wherein the lateral dampers are arranged at both end portions of the frame, the lateral dampers being arranged symmetrically with respect to the center of the frame; the secondary rubber stacking springs are arranged on a secondary spring mounting seat of the framework and are symmetrically arranged relative to the center of the framework.

In order to improve the curve passing capacity of the bogie, the core plate is installed on the vehicle body through a fastener, a sliding bearing is installed on the inner side of a core plate installation seat on the framework, and the core plate is installed on the core plate installation seat through the sliding bearing and can rotate relative to the center of the bogie. The utility model discloses a heart dish passes through the bolt and installs on the automobile body, and cylinder slide bearing installs the inboard of heart dish mount pad on the framework, is located the center of bogie for install the heart dish on the automobile body and have certain rotation space through the relative bogie of cylinder slide bearing.

Preferably, the brake is a tread brake.

The utility model discloses a narrow gauge bogie axle box pull rod adopts two pull rod symmetrical arrangement, and one system spring adopts the difference in height symmetrical arrangement, and horizontal bumper shock absorber arranges at the framework tip, is central symmetrical arrangement, and two system rubber pile springs are installed on two system spring mount pads of framework, are bogie central symmetrical arrangement.

The utility model discloses a bogie traction motor adopts and embraces shaft type structure, installs on the motor mount pad of framework bottom, and traction motor passes through the shaft coupling to be connected with the gear box, and the gear box passes through the gear box jib to be installed on the bogie framework. The brakes adopt tread braking and are respectively installed at the end parts of the framework.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses bogie frame structure has avoided traditional bogie frame roof beam body group to step in fact, thoroughly solved traditional bogie frame manufacture in-process and caused the shortcoming of the horizontal shrink of framework easily, frame group also is favorable to the framework to form a complete whole to the omission of welding seam simultaneously, the automobile body effort of avoiding the framework transmission passes through roof beam body butt weld, be favorable to framework overall structure's enhancement, reduced welding group simultaneously to right, welding seam detection process, practice thrift man-hour, simplify the framework manufacturing procedure.

2. The first-series and second-series mounting structures of the bogie are compact, the implementation process is simple and convenient, and the bogie has excellent damping and curve passing capabilities while the cost control of the bogie is facilitated.

3. The driving and braking system meets the space arrangement requirement of the narrow-gauge bogie, and is convenient to install, maintain and implement and good in maintainability.

4. The core disc installed on the car body has a certain rotating space relative to the bogie through the cylindrical sliding bearing, so that the curve passing capacity of the bogie is promoted, and meanwhile, the cylindrical sliding bearing is made of a composite wear-resistant material with self-lubrication, so that the requirement of the rotating sliding friction coefficient of the car body relative to the bogie is met, and the core disc has the advantage of good maintainability.

Compare with CN104334435B, the utility model discloses a apron, horizontal riser, vertical riser, the horizontal gusset of tip, middle horizontal gusset, vertical gusset under the framework at first assembly welding, then the welding upper cover plate forms integrative frame construction, uses frame construction as the basis at last, welds various mount pads. The framework structure of implementing like this actually is further than retrieval patent, the step of traditional bogie frame roof beam body group is to having avoided, thoroughly solved and caused the shortcoming of the horizontal shrink of framework easily in the traditional bogie frame manufacturing process, the frame is to omitting of welding seam also is favorable to the framework to form a complete whole simultaneously, the automobile body effort of avoiding the framework transmission passes through roof beam body butt weld, be favorable to the enhancement of framework overall structure, welding group is to having reduced simultaneously, the welding seam detects the process, save man-hour, simplify the framework manufacturing procedure.

Compare CN201116124Y, the utility model discloses a framework is an unified whole that uses frame construction as the basis, has thoroughly solved the shortcoming that causes the horizontal shrink of framework easily in traditional bogie frame manufacturing process, and the automobile body effort of avoiding the framework transmission passes through roof beam body butt weld. From the aspect of framework structural strength, technology realization and cost saving, the utility model discloses a framework has obvious advantage.

Compare with CN 203580969U, the utility model discloses when framework manufacturing and bogie assembly process optimization, bogie operating performance and track adaptability also have the improvement of certain degree.

Drawings

FIG. 1 is a schematic view of a truck mounting structure according to an embodiment of the present invention;

fig. 2 is a top plan view of a truck assembly according to an embodiment of the present invention;

fig. 3 is a front view of the truck assembly of an embodiment of the present invention;

FIG. 4 is a front view of the frame of FIG. 1;

FIG. 5 is a bottom view of the frame of FIG. 1;

FIG. 6 is a view of the construction underframe of FIG. 1;

FIG. 7 is a view showing the inner structure of the bottom frame of the frame of FIG. 1;

FIG. 8 is a schematic view of the wheel set assembly of FIG. 1;

FIG. 9 is a schematic view of the axle box assembly of FIG. 8;

fig. 10 is an enlarged view of the axle box support of fig. 8.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

A narrow gauge vehicle bogie frame, as shown in figures 6 and 7, the entire frame 9 is in the shape of a Chinese character 'ri'. The framework 9 is composed of a framework 16 and various mounting seats welded on the framework 16, wherein the framework 16 is a unified whole formed by welding an upper cover plate 28, a lower cover plate 29, a transverse vertical plate 31, a longitudinal vertical plate 34, end transverse rib plates 30, middle transverse rib plates 32 and longitudinal rib plates 33, and the mounting seats of various types of frameworks are welded on the framework 16. Specifically, the frame 16 includes two side members, a cross member and an end member connected between the two side members; the side beams, the cross beams and the end beams are all box-shaped beams. Each side beam is mainly formed by connecting an upper cover plate 28, a lower cover plate 29, two longitudinal vertical plates 34 and a plurality of longitudinal rib plates 33; each cross beam is mainly formed by connecting an upper cover plate 28, a lower cover plate 29, two transverse vertical plates 31 and a plurality of middle transverse rib plates 32; each end beam is mainly formed by connecting an upper cover plate 28, a lower cover plate 29, two transverse vertical plates 31 and a plurality of end transverse rib plates 30.

As shown in fig. 4 and 5, each type of mount includes: the structure comprises a transverse shock absorber mounting seat 17, a gear box hanging mounting seat 18, a core disc mounting seat 19, a vertical shock absorber mounting seat 20, a secondary spring mounting seat 21, a rotary stopping seat 22, a brake mounting seat 23, an end axle box pull rod mounting seat 24, a primary spring mounting plate 25, a middle axle box pull rod mounting seat 26 and a motor mounting seat 27. Traditional bogie framework is by riser and apron and roof beam body muscle group weld into the curb girder, the crossbeam, the end beam, then by the roof beam body butt joint group weld into the framework totality, be different from the welding form of traditional bogie framework, this utility model bogie framework is at first the group weld down apron 29, horizontal riser 31, vertical riser 34, the horizontal gusset 30 of tip, middle horizontal gusset 32, vertical gusset 33, then weld upper cover plate 28, form integrative frame 16 structure, use frame 16 structure as the basis at last, weld various mount pads. The framework structure implemented like this has avoided traditional bogie frame roof beam body group to organize the step in fact, thoroughly solved and caused the shortcoming of framework horizontal shrink easily in traditional bogie frame manufacturing process, the omission of 16 group's welding seams of frame also is favorable to framework 9 to form a complete whole simultaneously, the automobile body effort of avoiding the framework 9 transmission passes through roof beam body butt weld, be favorable to framework 9 overall structure's reinforcement, welding group is right having reduced simultaneously, the welding seam detects the process, save man-hour, simplify framework 9 manufacturing procedure.

A narrow gauge vehicle bogie, as shown in fig. 1, 2, 3, the narrow gauge bogie structure comprising: the device comprises a brake 1, a core disc 2, a cylindrical sliding bearing 3, a secondary rubber stacking spring 4, a gear box suspender 5, a transverse shock absorber 6, a gear box 7, a traction motor 8, the framework 9, a coupling 10, a vertical shock absorber 11, a primary spring 12, an axle box device 13 and a wheel pair assembly 14.

The bogie primary suspension device comprises: the suspension system comprises a first series of springs 12, axle box pull rods 15 and vertical shock absorbers 11, wherein the axle box pull rods 15 are symmetrically arranged by adopting double pull rods, and the first series of springs are symmetrically arranged by adopting height difference; the secondary suspension device includes: the shock absorber 6, two rubber heap springs 4, cylindrical sliding bearing 3, wherein horizontal shock absorber 6 arranges in the end of framework 9, and be central symmetry arrangement, two rubber heap springs 4 install on two spring mount pads 21 of framework 9, be central symmetry arrangement. The first-series and second-series mounting structures of the bogie are compact, the implementation process is simple and convenient, and the bogie has excellent damping and curve passing capabilities while the cost control of the bogie is facilitated.

The bogie traction motor 8 is of a shaft-hung type structure and is mounted on a motor mounting seat 27 at the bottom of a framework 9, the traction motor 8 is connected with a gear box 7 through a coupling 10, the gear box 7 is mounted on the bogie framework 9 through a gear box suspender 5, a brake 1 is braked by a tread and is respectively mounted at the end parts of the framework 9, and the driving and braking system meets the space arrangement requirement of a narrow-gauge bogie, so that the installation, maintenance and implementation are convenient, and the maintainability is good.

The core plate 2 is installed on the car body through a bolt, the cylindrical sliding bearing 3 is installed on the inner side of the core plate installation seat 19 on the framework 9 and is located in the center of the bogie, so that the core plate 2 installed on the car body has a certain rotating space relative to the bogie through the cylindrical sliding bearing 3, the curve passing capacity of the bogie is promoted, meanwhile, the cylindrical sliding bearing 3 is made of a composite wear-resistant material with self-lubrication, the requirement of the rotating sliding friction coefficient of the car body relative to the bogie is met, and the core plate has the advantage of being good in maintainability.

Because the narrow-gauge bogie has limited installation space at the bottom of the bogie due to the influence of the inner side distance of wheel pairs and the diameters of small wheels, the bogie is not provided with a traction pull rod device, traction force and braking force are transmitted to the axle box body 13 by the wheel pairs provided with motor gear boxes, then transmitted to axle box pull rod installation seats 24 and 26 on the framework 9 by the axle box body 13 through the axle box pull rods 15, and finally transmitted to the core disc 2 connected with a vehicle body by the core disc installation seat 19 on the framework 9 through the cylindrical sliding bearing 3.

The axle box pull rods 15 arranged on two sides of the bogie, the axle box bodies 13 arranged on two sides of the wheel pair, the lateral axle box pull rod mounting seats 24 and the middle axle box pull rod mounting seats 26 arranged on two sides of the framework 9 enable traction force and braking force to be uniformly and consistently transmitted in the longitudinal direction of the bogie, and avoid wheel load reduction and adverse effects on traction adhesion caused in the process of transmitting the traction force and the braking force of the conventional railway vehicle bogie.

The wheel-set axle box device is provided with wheels 36, an axle 35, an axle box body 13, an axle box support 37 and an axle box end cover 38, wherein the axle box body 13 is provided with a series of spring mounting interfaces 131 and 132 with front and back height differences, a second axle box pull rod mounting interface 133 with height differences, a first axle box pull rod mounting interface 134 is provided with a series of vertical stop assembly interfaces, and the axle box support is provided with a series of vertical shock absorber mounting interfaces 372 and a bearing mounting interface 371, so that the mounting structures of the first spring 12, the axle box pull rod 15, the first shock absorber, the series of stops arranged on the first series of stop mounting seats 39 and the axle box bearing are compact and do not interfere with each other, the maintenance and the disassembly are convenient, and the load space distribution is good, so that the transmission of traction force and the braking force can achieve mutual balance and.

The above-mentioned embodiments are illustrative and should not be construed as limiting the scope of the invention, which is defined by the appended claims, and all modifications of the equivalent forms of the present invention which are obvious to those skilled in the art after reading the present invention.

Claims (10)

1. A bogie frame comprises a frame (16) and various mounting seats welded on the frame (16);

the frame (16) comprises two side beams, a cross beam connected between the two side beams and an end beam; the method is characterized in that:

the side beams, the cross beams and the end beams are all box-shaped beams;

each side beam is mainly formed by connecting an upper cover plate (28), a lower cover plate (29), two longitudinal vertical plates (34) and at least one longitudinal rib plate (33);

each cross beam is mainly formed by connecting an upper cover plate (28), a lower cover plate (29), two transverse vertical plates (31) and at least one middle transverse rib plate (32);

each end beam is mainly formed by connecting an upper cover plate (28), a lower cover plate (29), two transverse vertical plates (31) and at least one end transverse rib plate (30).

2. The bogie frame of claim 1, wherein there are two of said end beams and one of said cross beams; the frame (16) is in a shape of a Chinese character 'ri' as a whole in a plan view.

3. The bogie frame according to claim 1 or 2, wherein the types of mounts comprise a lateral shock absorber mount (17), a gearbox hanging mount (18), a core plate mount (19), a vertical shock absorber mount (20), a secondary spring mount (21), a rotation stop (22), a brake mount (23), an end axlebox rod mount (24), a primary spring mount (25), an intermediate axlebox rod mount (26), a motor mount (27).

4. A narrow gauge vehicle bogie, characterized by comprising a bogie frame (9) according to any of claims 1-3.

5. The narrow gauge vehicle bogie of claim 4, characterized in that the narrow gauge vehicle bogie comprises brakes (1) mounted at both ends of a frame (9), a center plate (2) mounted at a central position of a cross beam of the frame (9), and a gearbox boom (5), a gearbox (7), a traction motor (8), a primary suspension device, a secondary suspension device, an axle box device (13), a wheel pair assembly (14) mounted on the frame (9);

the traction motor (8) is arranged on a motor mounting seat (27) at the bottom of the frame (9) and adopts a shaft-surrounding type structure, the traction motor (8) is connected with the gear box (7) through a coupling (10), and the gear box (7) is arranged on the bogie frame (9) through a gear box suspender (5).

6. The narrow gauge vehicle bogie of claim 5, wherein the primary suspension device comprises a vertical shock absorber (11), a series of springs (12) and axle box pull rods (15), wherein the axle box pull rods (15) are symmetrically arranged at the left side and the right side of the framework (9), and a double-pull-rod structure is adopted at one side, wherein end axle box pull rod mounting seats (24) are respectively arranged at two end parts of one side of the framework (9), an intermediate axle box pull rod mounting seat (26) is arranged at the middle part of one side of the framework (9), and two axle box devices (13) at one side are respectively connected between the intermediate axle box pull rod mounting seats (26) and the corresponding end axle box pull rod mounting seats (24) through the corresponding axle box pull rods (15).

7. The narrow gauge vehicle bogie of claim 5, wherein the axle box arrangement comprises two axle boxes mounted at both ends of an axle (35), two axle box supports (37) and two axle box end caps (38);

the front end and the rear end of the shaft box body are respectively provided with a series of spring mounting interfaces (131, 132), a series of springs are mounted between the two series of spring mounting interfaces (131, 132) and a series of spring mounting seats arranged on the framework (9), and the two series of spring mounting interfaces (131, 132) form height difference;

the front end of the axle box body is provided with a protruding part, the protruding part is provided with a first axle box pull rod mounting interface (134), and the lower part of the rear end of the axle box body is provided with a second axle box pull rod mounting interface (133); wherein, the first axle box pull rod mounting interface (134) at the front end of the axle box body is connected with the end part axle box pull rod mounting seat (24) through an axle box pull rod, and the second axle box pull rod mounting interface (133) at the rear end of the axle box body is connected with the middle axle box pull rod mounting seat (26) through an axle box pull rod.

8. The narrow gauge vehicle truck of claim 7, wherein the pedestal bearing (37) has an axle mounting hole with a bearing mounting interface (371) disposed therein, and the top of the pedestal bearing (37) has a vertical shock absorber mounting interface (372).

9. The narrow-gauge vehicle bogie according to any one of claims 6-8, characterized in that the primary springs (12) are symmetrically arranged on the left and right sides of the frame (9), and two sets of primary springs (12) are arranged between each axle box arrangement (13) and the frame (9), wherein the primary springs near the center of the frame (9) are positioned higher to form a height difference than the primary springs away from the center of the frame (9); and/or

The secondary suspension device comprises a sliding bearing (3), a secondary rubber stacking spring (4) and a transverse shock absorber (6); wherein the transverse dampers (6) are arranged at both ends of the frame (9), the transverse dampers (6) being arranged centrally symmetrically with respect to the frame (9); the secondary rubber stacking spring (4) is installed on a secondary spring installation seat (21) of the framework (9), and the secondary rubber stacking spring (4) is arranged in central symmetry relative to the framework (9).

10. The narrow gauge vehicle bogie of any one of claims 5-8, wherein the core plate (2) is mounted to the vehicle body by fasteners, the slide bearing (3) is mounted inside a core plate mounting seat (19) on the frame (9), and the core plate (2) is mounted on the core plate mounting seat (19) by the slide bearing (3) and is rotatable relative to the centre of the bogie.

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