Bogie of narrow gauge railway generator car

Abstract

The utility model discloses a narrow gauge railway generator car bogie. The technical problem that in the prior art, a bogie applied to a narrow gauge railway is poor in stability is solved. The narrow gauge railway generator car bogie comprises a swing bolster assembly which comprises a swing bolster body and a lower center plate arranged in the middle of the swing bolster body; the two side frame assemblies are oppositely arranged at the two ends of the swing bolster body, each side frame assembly comprises a side frame body and two elastic stoppers, each side frame body is provided with a groove used for containing the swing bolster body, one end of each swing bolster body is connected with the bottom face of the corresponding groove, and the two elastic stoppers are arranged on the two opposite side walls, in the moving direction of the bogie, of each groove. The elastic baffles are attached to the two side walls of the swing bolster body. The two wheel set assemblies are oppositely arranged on the two sides of the swing bolster body, and the two ends of each wheel set assembly are connected with the side frame body through the axle box suspension devices respectively. The bogie is high in stability.

Description

Technical Field

[0001] This application belongs to the field of bogie technology, specifically relating to a bogie for a narrow-gauge railway power generation car. Background Technology

[0002] As an independent running gear, the bogie directly supports the car body, bears and transmits the weight of all parts above the frame, and ensures the normal operation of the vehicle and the comfort of the passengers. With the increasing speed of railway vehicles and the growing requirements for operational quality, the development of frame-type bogies in my country has reached a new level. Although frame-type bogies possess ample static and dynamic energy storage and excellent mechanical properties, most research in this area focuses on bogies applied to broad gauge railways.

[0003] Narrow-gauge railways refer to railways with a track gauge of less than 1435mm. Simply applying the design of broad-gauge bogies to narrow-gauge railways results in decreased bogie stability, leading to poor load-sharing performance and affecting the normal operation of the train. Utility Model Content

[0004] To address the technical problem of poor stability in current bogies used in narrow-gauge railways, this application provides a narrow-gauge railway power car bogie.

[0005] In a first aspect of this application, a narrow-gauge railway power car bogie is provided, comprising:

[0006] The rocking bolster comprises a rocking bolster body and a lower central plate disposed in the middle of the rocking bolster body;

[0007] The bogie is composed of two side frames, which are disposed opposite to each other at both ends of the bogie body. Each side frame includes a side frame body and two elastic stops. The side frame body has a groove for accommodating the bogie body. One end of the bogie body is connected to the bottom surface of the groove. The two elastic stops are disposed on opposite side walls of the groove along the moving direction of the bogie. The elastic stops are in contact with the side walls of the bogie body.

[0008] The wheelset assembly consists of two wheelsets arranged opposite each other on both sides of the bolster body, with each wheelet assembly having its ends connected to the side frame body via an axle box suspension device.

[0009] In some embodiments, the bolster body has a receiving groove for accommodating the elastic stop.

[0010] In some embodiments, the end face of the elastic stop facing the bolster body contacts the bottom surface of the receiving groove; the sidewall of the elastic stop is spaced apart from the receiving groove.

[0011] In some embodiments, the bolster assembly has two guide plates on its sidewall facing the elastic stop. The two guide plates are arranged opposite each other along the length of the bolster body to form the receiving groove, and there is a gap between the two guide plates and the sidewall of the elastic stop.

[0012] In some embodiments, the receiving slots are located at both ends of the bolster body and face the sidewalls of the side frame body.

[0013] In some embodiments, a pad is detachably provided on the side wall of the bolster body facing the side frame body, the pad corresponding to the elastic stop one by one, and the pad contacting the corresponding elastic stop surface.

[0014] In some embodiments, the elastic stop has a columnar body, one end of which is provided with an elastic element for abutting against the side wall of the bolster body, and the other end of which is connected to the side frame body; the middle part of the columnar body has a cavity.

[0015] In some embodiments, the bolster assembly further includes a central suspension device, which includes a support plate and springs disposed at both ends of the support plate. The support plate is a straight plate, and its two ends are respectively disposed between the bolster body and the side frame body.

[0016] In some embodiments, each end of the tray is provided with two springs, the two springs being symmetrically arranged along the centerline of the tray, wherein the springs include an outer circular spring and an inner circular spring sleeved within the outer circular spring;

[0017] The tray is provided with spring mounting seats at both ends to fix the spring on the tray.

[0018] In some embodiments, the narrow-gauge railway power car bogie further includes a vertical damper, with two vertical dampers respectively disposed at both ends of the bolster body; each of the opposite end faces of the bolster body is provided with a first mounting seat for hinged connection with the vertical damper, and each side wall of the side frame body is provided with a second mounting seat for hinged connection with the vertical damper.

[0019] The narrow-gauge railway power car bogie also includes a longitudinal protection device, which includes a traction rod and ball joints at both ends of the traction rod. The end face of the bolster body is provided with a first traction rod seat for connecting with one of the ball joints, and the side wall of the side frame body is provided with a second traction rod seat for connecting with the other ball joint.

[0020] The top of the rocking bolster body is also provided with elastic side bearings, and the two elastic side bearings are respectively provided at both ends of the top wall of the rocking bolster body.

[0021] According to one or more embodiments of this application, the bogie further limits the relative position between the bolster assembly and the side frame body by setting elastic stops. When the bogie turns on a narrow rail, each side frame body has an elastic stop that contacts or abuts against the bolster body. That is, both ends of the bolster body are subjected to force, and the directions of the force are opposite, so that the relative displacement between the side frame body and the bolster body is not easy to occur. This ensures that the traction rod between the side frame body and the bolster body will not be further deformed or fall off due to the relative displacement between the side frame body and the bolster body. The traction rod is not easy to fail. Even if the traction rod fails, the elastic stop can still abut against the bolster body, so that the bogie can complete the steering function and increase the stability and safety of the bogie during operation. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a narrow-gauge railway power car bogie is shown in one or more embodiments of this application.

[0023] Figure 2 It shows Figure 1 A schematic diagram of the structure consisting of the middle and side frames.

[0024] Figure 3 It shows Figure 1 A schematic diagram of the structure of the middle section of the rocking bolster.

[0025] Figure 4 It shows Figure 1 Schematic diagram of the central suspension device

[0026] Explanation of reference numerals in the attached drawings: 10-Bogie, 100-Ballast assembly, 110-Ballast body, 111-Receiving groove, 112-Guide plate, 113-Plate, 120-Lower center plate, 130-Central suspension device, 131-Support plate, 132-Spring, 132a-Outer spring, 132b-Inner spring, 133-Spring mounting seat, 134-Swing seat support, 135-Swing seat, 140-Elastic side bearing assembly, 200-Side frame assembly, 21 0-Side frame body, 211-Groove, 211a-Side wall, 211b-Mounting groove, 220-Elastic stop, 221-Columnar body, 222-Elastic element, 300-Wheelset assembly, 310-Axle, 320-Wheel, 400-Vertical shock absorber, 410-First mounting seat, 420-Second mounting seat, 500-Longitudinal protection device, 510-Traction rod, 520-Spherical hinge, 530-First traction rod seat, 540-Second traction rod seat. Detailed Implementation

[0027] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] When the bogie turns, the car body, under the action of inertia, also has a force in the same direction of movement as before the turn. This force acts on the lower center plate of the bogie, that is, the lower center plate receives the first stress from the car body and is transmitted to the bolster assembly. The guiding effect of the rail on the wheelset assembly causes the rail to have a second stress on the wheelset assembly, which is transmitted to the side frame body connected to the wheelset assembly. The first stress and the second stress act on the bogie. When the angle between the first stress and the second stress is not a right angle, the side frame body and the bolster body under stress are prone to misalignment, the traction rod is prone to failure, and thus the stability of the bogie is reduced.

[0029] Please see Figures 1-4 According to the first aspect of this application, a narrow-gauge railway power generation car bogie is provided for vehicles running on narrow rails, so that the car body of the track-type vehicle can smoothly complete the turning. The narrow-gauge railway power generation car bogie 10 (hereinafter referred to as bogie 10) includes a bolster assembly 100, two side frames 200 and a wheelset assembly 300.

[0030] The bolster assembly 100 includes a bolster body 110 and a lower center plate 120 disposed in the middle of the bolster body 110. The lower center plate 120 is rotatably connected to the upper center plate of the vehicle body, and the transmission is performed through the connected upper center plate and lower center plate 120.

[0031] Two side frame components 200 are arranged opposite each other at both ends of the bolster body 110. The side frame component 200 includes a side frame body 210 and two elastic stops 220. The side frame body 210 is a structural component that supports the bolster component 100 and connects the two sets of wheelset components 300. The side frame body 210 has high strength to support the bolster component 100 and the vehicle body connected to the bolster component 100.

[0032] The side frame body 210 has a groove 211 for accommodating the bolster body 110. One end of the bolster body 110 is connected to the bottom surface of the groove 211. By using the groove 211 in the side frame body 210, the height of the bolster assembly 100 on the bogie 10 is reduced, thereby lowering the center of gravity of the bogie 10 and improving the overall stability of the bogie 10, which in turn improves the stability of vehicle operation. Two elastic stops 220 are provided on the opposite side walls 211a of the groove 211 along the direction of movement of the bogie 10, and the elastic stops 220 are in contact with the side walls 211a of the bolster body 110.

[0033] Two wheelset assemblies 300 are arranged opposite each other on both sides of the bolster body 110. The two ends of each wheelset assembly 300 are connected to the side frame body 210 through axle box suspension devices. The wheelset assembly 300 is a structural component of the bogie 10 that is in direct contact with the track. Each wheelset assembly 300 includes an axle 310 and wheels 320 arranged at both ends of the axle 310.

[0034] With the axial direction of the axle 310 as the first direction and the length direction of the side frame body 210 as the second direction, the first direction is perpendicular to the second direction, and the length direction of the bolster body 110 is parallel to the first direction. Two elastic stops 220 are provided on the opposite side walls 211a of the groove 211 along the moving direction of the bogie 10, and the elastic stops 220 are in contact with the side walls 211a of the bolster body 110, that is, the two elastic stops 220 are provided along the second direction. By setting the elastic stop 220, the relative position between the bolster assembly 100 and the side frame body 210 is further limited. When the bogie 10 turns on the narrow rail, each side frame body 210 has an elastic stop 220 that contacts or abuts against the bolster body 110. That is, both ends of the bolster body 110 are subjected to force, and the directions of the force are opposite. This makes it difficult for the side frame body 210 and the bolster body 110 to undergo relative displacement. This ensures that the traction rod 510 between the side frame body 210 and the bolster body 110 will not deform or fall off due to the relative displacement between the side frame body 210 and the bolster body 110. The traction rod 510 is not easy to fail. Even if the traction rod 510 fails, the elastic stop 220 can still abut against the bolster body 110, so that the bogie 10 can complete the steering function, which increases the stability and safety of the bogie 10 during operation.

[0035] Among them, the elastic stop 220 has a certain degree of elasticity, which allows the elastic stop 220 or part of the elastic stop 220 to deform during the turning of the bogie 10. The elastic stop 220 and the bolster body 110 are in soft contact, and the impact generated by the contact is small, which is not easy to damage the bolster body 110 and the side frame body 210, which is conducive to the long-term and stable operation of the bogie 10.

[0036] Please see Figure 1 and Figure 3In some embodiments, the bolster body 110 has a receiving groove 111 for accommodating the elastic stop 220. The receiving groove 111 has at least two sidewalls 211a to form a groove-like structure. It can be understood that the elastic stop 220 is located within the receiving groove 111. When the bolster body 110 is displaced relative to the side frame body 210, at least one elastic stop 220 on the same side frame body 210 can maintain contact with the sidewall 211a or bottom wall of the receiving groove 111. This reduces the possibility of the elastic stop 220 being weak or failing due to a smooth contact surface, and ensures the elastic stop 220's ability to limit the bolster body 110.

[0037] In some embodiments, the end face of the elastic stop 220 facing the bolster body 110 contacts the bottom surface of the receiving groove 111; the side wall 211a of the elastic stop 220 is spaced apart from the receiving groove 111.

[0038] When the car body travels straight on the track, the force exerted by the car body on the side frame body 210 via the bolster assembly 100 is parallel to the second direction. Therefore, both elastic stops 220 on the same side frame body 210 contact the bottom of the receiving groove 111 through their end faces. This allows the force exerted by the elastic stops 220 on the bolster body 110 during turning to be more effectively directed in the direction of bogie 10 rotation, improving the limiting effect of the elastic stops 220 on the bolster body 110 and the side frame body 210. The sidewalls of the elastic stops 220 are spaced apart from the receiving groove 111 to allow for a gap between the elastic stops 220 and the bolster body 110, accommodating potential bumps during bogie 10 operation and reducing the risk of damage to the sidewalls of the receiving groove 111 and the elastic stops 220 due to hard contact. Alternatively, in some embodiments, elastic elements 222 can be provided on the sidewalls of the elastic stops 220 to further reduce the impact of hard contact.

[0039] Please see Figure 1 and Figure 3 In some embodiments, the bolster assembly 100 is provided with two guide plates 112 on the sidewall facing the elastic stop 220. The two guide plates 112 are arranged opposite each other along the length direction of the bolster body 110 to form a receiving groove 111. There is a gap between the two guide plates 112 and the sidewall of the elastic stop 220.

[0040] Two guide plates 112 form a set of guide plates 112. Four sets of guide plates 112 are provided on the bolster assembly 100 to limit the movement of multiple elastic stops 220 on the side frame body 210. The two guide plates 112 are arranged opposite each other along the length of the bolster body 110, meaning the elastic stops 220 are not obstructed in the vertical direction. When the bogie 10 experiences bumps causing vertical displacement between the bolster body 110 and the side frame body 210, the bolster body 110 and the guide plates 112 will not collide with the elastic stops 220, thus preventing damage to the elastic stops 220. Only when the bolster assembly 100 and the side frame body 210 experience horizontal displacement can the receiving groove 111 engage with the elastic stops 220 to prevent severe misalignment between the bolster body 110 and the side frame body 210, which could lead to failure of the traction rod 510.

[0041] In some embodiments, the receiving grooves 111 are located at both ends of the bolster body 110 and face the side walls of the side frame body 210. That is, the bottom wall of the receiving groove 111 is perpendicular to the second direction, so that when the elastic stop 220 contacts the bottom of the receiving groove 111, the force can be transmitted more along the first direction.

[0042] Please see Figure 1 and Figure 3 In some embodiments, a pad 113 is detachably provided on the side wall of the bolster body 110 facing the side frame body 210. The pad 113 corresponds one-to-one with the elastic stop 220, and the pad 113 is in contact with the corresponding elastic stop 220 surface.

[0043] Considering the large weight of the car body supported by the bogie 10 and the high inertia of the car body, the pad 113 ensures that the elastic stop 220 does not directly contact the bolster body 110, thereby reducing the probability of deformation of the bolster body 110 under stress. By periodically replacing the pad 113, the contact between the pad 113 and the elastic stop 220 on the bogie 10 is kept small, meaning that even when the bolster body 110 and the side frame body 210 experience small displacement, the elastic stop 220 can hold them back and limit further displacement, reducing the probability of traction rod 510 failure.

[0044] In some embodiments, the elastic stop 220 has a columnar body 221, one end of which is provided with an elastic element 222 for contacting the side wall of the bolster body 110, and the other end of the columnar body 221 is connected to the side frame body 210; the middle part of the columnar body 221 has a cavity. The columnar structure has high strength and resistance to deformation, and the cavity in the columnar body 221 allows the columnar body to have good strength while having low weight. The elastic element 222 can be a structural component with certain strength and toughness, such as rubber, plastic, or wood.

[0045] Please see Figure 1 and Figure 4 In some embodiments, the bolster assembly 100 further includes a central suspension device 130, which includes a support plate 131 and springs 132 disposed at both ends of the support plate 131. The support plate 131 is a straight plate, and its two ends are respectively disposed between the bolster body 110 and the side frame body 210. The straight plate 131 makes it less prone to stress concentration when the bogie 10 is used on narrow rails, which is beneficial for the lateral sway of the car body on narrow rails.

[0046] In some embodiments, connectors are provided at both ends of the bottom surface of the tray 131 to facilitate the installation of the rocker assembly 100 on the side frame body 210. Specifically, the connectors include a swing seat 135 connected to the tray 131 and a swing seat support 134 disposed on the swing seat 135. The bottom wall of the groove 211 of the side frame body 210 is provided with a mounting groove 211b that matches the support of the swing seat 135. After the swing seat support 134 is disposed in the mounting groove 211b, it can also limit the relative position between the rocker assembly 100 and the side frame body 210.

[0047] Please see Figure 4 In some embodiments, each end of the support plate 131 is provided with two springs 132, which are symmetrically arranged along the centerline of the support plate 131. Each spring 132 includes an outer circular spring 132a and an inner circular spring 132b sleeved within the outer circular spring 132a. Spring mounting seats 133 are provided at both ends of the support plate 131 to fix the springs 132 to the support plate 131. The plane containing the axes of the two springs 132 is parallel to the second direction. Furthermore, the two springs 132 at the same end of the support plate 131 are symmetrically arranged relative to the first direction containing the rotation axis of the lower center plate 120 to improve the symmetry of the bolster assembly 100. This ensures that the bogie 10 experiences a balanced force from the elastic stop 220 during rotation, which is beneficial for improving the stability of the bogie 10.

[0048] The narrow-gauge railway power car bogie 10 also includes a longitudinal protection device 500, which includes a traction rod 510 and ball joints 520 disposed at both ends of the traction rod 510. The end face of the bolster body 110 is provided with a first traction rod seat 530 for connecting with one ball joint 520, and the side wall of the side frame body 210 is provided with a second traction rod seat 540 for connecting with another ball joint 520. Understandably, both the first traction rod seat 530 and the second traction rod seat 540 are located on the outside of the bogie, that is, the traction rod 510 is located on the outside of the side frame body 210. On the one hand, this does not occupy the space between the two side frame bodies 210, giving the bogie 10 more space to install braking components or other devices. On the other hand, the longitudinal protection device 500 set on the side wall of the side frame body 210, and the connection method of the traction rod 510 to the first traction rod seat 530 and the second traction rod seat 540 through the ball joint 520, can make the traction rod 510 less susceptible to the vertical undulation of the bogie 10, thereby reducing the probability of traction rod 510 failure and ensuring the stable operation of the bogie 10.

[0049] It should be noted that in this application, longitudinal refers to the direction of movement of the bogie 10, that is, parallel to the second direction; lateral refers to the direction of movement of the bogie 10, which is parallel to the first direction, and vertical refers to the direction of movement of the bogie 10, which is perpendicular to the first and second directions.

[0050] Specifically, the traction rod 510 can be a forged structure made of Q345E or 40Cr material, with a longitudinal stiffness of 15MN / m. The ball joint 520 is a composite structure made of rubber and metal; the traction rod 510 and the traction rod seat are in a small-angle inclined fit to ensure that the ball joint 520 is in a tight fit under the action of bolt tightening force, eliminating longitudinal clearance.

[0051] The top of the bolster body 110 is also provided with elastic side bearing assemblies 140. Two elastic side bearing assemblies 140 are respectively located at both ends of the top wall of the bolster body 110 to improve the rotational and rollover constraints between the bogie 10 and the car body. Specifically, the lower center plate 120 is bolted to the bolster body 110. The lower center plate 120 contains a nylon conductive center plate wear plate. The elastic side bearing assemblies 140 are welded to the bolster, and the two elastic side bearing assemblies are symmetrically arranged with respect to the rotation axis of the lower center plate 120.

[0052] Please see Figure 1In some embodiments, the narrow-gauge railway power car bogie 10 further includes vertical dampers 400, with two vertical dampers 400 respectively disposed at both ends of the bolster body 110; the vertical dampers 400 are vertically arranged; each of the opposite end faces of the bolster body 110 is provided with a first mounting seat 410 for hinged connection with the vertical damper 400, and the side wall of each side frame body 210 is provided with a second mounting seat 420 for hinged connection with the vertical damper 400. The vertical dampers 400 improve the vertical dynamic performance and enhance the stability of the bogie 10 during use. Specifically, the mounting tilt angle of the vertical damper 400 is 5°, so that the vertical damper 400 can also provide vertical damping to a certain extent. The vertical hydraulic damper provides vertical and lateral damping, with a damping coefficient of 60-80 kN*s / m, to improve the vertical dynamic performance of the vehicle.

[0053] The bogie 10 of this application, through the combination of various devices such as the side frame assembly 200, the bolster assembly 100, the longitudinal protection device 500, and the vertical shock absorber 400, enables the bogie 10 to have high vertical and longitudinal dynamic performance during the operation of the vehicle body. Moreover, during the use of the bogie 10, the traction rod 510 is not prone to failure regardless of whether vertical or longitudinal vibration occurs. Even if the traction rod 510 fails under extreme working conditions, the elastic stop 220 can still resist the bolster body 110 and play a traction role, so that the bogie 10 can operate normally and the safety is greatly improved.

[0054] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A bogie for a narrow-gauge railway power generation car, characterized in that, include: The rocking bolster comprises a rocking bolster body and a lower central plate disposed in the middle of the rocking bolster body; The bogie is composed of two side frames, which are disposed opposite to each other at both ends of the bogie body. Each side frame includes a side frame body and two elastic stops. The side frame body has a groove for accommodating the bogie body. One end of the bogie body is connected to the bottom surface of the groove. The two elastic stops are disposed on opposite side walls of the groove along the moving direction of the bogie. The elastic stops are in contact with the side walls of the bogie body. The wheelset assembly consists of two wheelsets arranged opposite each other on both sides of the bolster body, with each wheelet assembly having its ends connected to the side frame body via an axle box suspension device.

2. The narrow-gauge railway power car bogie according to claim 1, characterized in that, The bolster body has a receiving groove for accommodating the elastic stop.

3. The narrow-gauge railway power car bogie according to claim 2, characterized in that, The end face of the elastic stop facing the bolster body contacts the bottom surface of the receiving groove; the side wall of the elastic stop is spaced apart from the receiving groove.

4. The narrow-gauge railway power car bogie according to claim 3, characterized in that, The rocker assembly has two guide plates on its sidewall facing the elastic stop. The two guide plates are arranged opposite each other along the length of the rocker body to form the receiving groove. There is a gap between the two guide plates and the sidewall of the elastic stop.

5. The narrow-gauge railway power car bogie according to claim 2, characterized in that, The receiving grooves are located at both ends of the bolster body and face the sidewalls of the recess.

6. The narrow-gauge railway power car bogie according to claim 1, characterized in that, The side wall of the bolster body facing the side frame body is detachably provided with a pad, and the pad corresponds one-to-one with the elastic stop, and the pad contacts the corresponding elastic stop surface.

7. The narrow-gauge railway power car bogie according to claim 1, characterized in that, The elastic stop has a columnar body, one end of which is provided with an elastic element for abutting against the side wall of the bolster body, and the other end of which is connected to the side frame body; the middle part of the columnar body has a cavity.

8. The narrow-gauge railway power car bogie according to claim 1, characterized in that, The bolster assembly also includes a central suspension device, which includes a support plate and springs disposed at both ends of the support plate. The support plate is a straight plate, and its two ends are respectively disposed between the bolster body and the side frame body.

9. The narrow-gauge railway power car bogie according to claim 8, characterized in that, Each end of the tray is provided with two springs, which are symmetrically arranged along the center line of the tray. The springs include an outer circular spring and an inner circular spring sleeved inside the outer circular spring. The tray is provided with spring mounting seats at both ends to fix the spring on the tray.

10. The narrow-gauge railway power car bogie according to claim 1, characterized in that, The narrow-gauge railway power car bogie also includes a vertical damper, with two vertical dampers respectively disposed at both ends of the bolster body; each of the opposite end faces of the bolster body is provided with a first mounting seat for hinged connection with the vertical damper, and each side wall of the side frame body is provided with a second mounting seat for hinged connection with the vertical damper. The narrow-gauge railway power car bogie also includes a longitudinal protection device, which includes a traction rod and ball joints at both ends of the traction rod. The end face of the bolster body is provided with a first traction rod seat for connecting with one of the ball joints, and the side wall of the side frame body is provided with a second traction rod seat for connecting with the other ball joint. The top of the rocking bolster body is also provided with elastic side bearings, and the two elastic side bearings are respectively provided at both ends of the top wall of the rocking bolster body.

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