A three-axle railway locomotive power model bogie and transmission device

Abstract

The invention discloses a three-axle railway locomotive power model bogie and transmission device, comprising a gearbox, a frame connected to the outside of the gearbox, and a traction rod assembly connected to the bottom of the frame; wherein the gearbox comprises a gearbox control box at the top, a gearbox housing connected to three wheel groups, a power main shaft is arranged in the gearbox control box, one end of the power main shaft passes through the gearbox control box and is connected to a motor through a universal joint sleeve; a central speed change gear is connected below the shaft body of the power main shaft, the central speed change gear is connected to an intermediary gear set, and the intermediary gear set is connected to a coaxial power gear; the intermediary gear set and the coaxial power gear form an M-type output path, the number of the coaxial power gears is 3, they are located at the end of the M-type output path and at the wheel body positions of the three wheel groups respectively, and a recessed structure 1A and a recessed structure 1B are provided between the three wheel groups.

Description

Technical Field

[0001] The invention belongs to the field of simulation models and relates to a three-axle railway locomotive power model bogie and a transmission device. Background Art

[0002] It is difficult for existing simulation scale models to combine dynamic and static. Especially in railway locomotive models. Since most diesel locomotives and electric locomotives in the real world use electric transmission (some diesel locomotives use hydraulic transmission), in order to simulate, the model needs to simulate the appearance state in each dimension of the three-dimensional space. As the core component of the running gear of a locomotive vehicle, the bogie is usually composed of a frame, a power unit, a wheelset and a suspension device in the real world. However, under the condition of a small-scale model (less than 1 / 45), it is difficult to find a corresponding power unit on the bogie to meet the requirements of driving the car body constructed by the existing batch processing technology to travel on the track at a scaled speed. Therefore, since the end of the last century, the mature solution is to place a small DC motor inside the car body and provide power to the gearbox through the transmission shaft. The gearbox is responsible for outputting the power to the simulated bogie wheelset.

[0003] The gearbox is usually designed in such a way that the power output shaft of the gearbox is transformed through a worm gear, and the power output of the motor in the cabin along the tangential direction of the locomotive is transmitted through the worm gear to the movement of the rotation axis along the normal direction of the locomotive's forward direction. There are various gear set structures in this process. However, the popular gearboxes now have some problems. For example, in order to transmit power and change speed, a structure with multiple gears nested and transmitted force is adopted, which leads to a large size of the gearbox and occupies a lot of space. When looking at the gearbox from the side, it is easy to see the inside through the bogie structure. However, many bogies of railway locomotive models adopt a high-position crossbeam structure close to the bottom of the locomotive, and there is no visible structure below. Then the model gearbox cannot be hidden from the side and is forced to be made dark to reduce visibility and enhance the simulation effect, which also brings many process problems. At the same time, the degree of simulation of the appearance is also reduced.

[0004] For the electric locomotive model with three-axle bogie, it is difficult to express the outline of the motor compartment of the bogie in the existing design, which reduces the simulation.

[0005] The current design of the bogie appearance components is mainly satisfied with the moderate simulation of the appearance structure, but it is limited by the process and cannot be highly realistic. For example, the primary suspension spring device of the bogie is difficult to be properly expressed and is usually expressed in relief.

[0006] In the real world, there are many kinds of bogie traction rod devices on railway locomotives. For some specific bogies, the traction rod devices are located on both sides of the bogie along the direction of track travel, connected by crank arms to form a connecting rod mechanism, one end of which is connected to the body and the other end is connected to the bogie frame.

[0007] However, due to the application scenarios of small-scale models, the radius of track curves on reduced-size small-scale models, such as the HO specification model system with an internationally accepted standard gauge scale ratio of 16.5mm, is much smaller than the radius scaled down according to the actual state. This results in the bogie deflection amplitude being much greater than the actual vehicle when the locomotive turns, and cannot be simulated, so it can only be torn down and rebuilt. While meeting the cornering requirements, the traction mechanism is usually abandoned, which greatly reduces the degree of bogie simulation and damages the simulation characteristics, entertainment and viewing value of the precision model.

[0008] At the same time, due to the limitations of the current installation methods of gearbox and bogie simulation structures, many independent components cannot be installed while meeting dynamic driving requirements and static viewing requirements, which objectively reduces the viewing, dynamic entertainment and interactive entertainment value of the model.

[0009] In general, it is difficult for existing technologies to achieve "full-scale simulation and take into account the requirements of dynamic and static models", which means that railway locomotive models cannot be picked up and displayed in all directions like aircraft and tank models. There are no simulated details on the bottom of the car, and the side structure is also not realistic.

[0010] The current common model bogie design still has some defects. For example, the distance between the front and rear wheels of the bogie with three wheelsets is relatively long. On the model track, due to the shape of the wheelset tread, it may not be able to contact the track well to obtain power supply or signal with sufficiently low resistivity. At the same time, when facing some common problems, the wheelset cannot guarantee maximum contact, which can easily cause power failure or one or two sets of treads to be temporarily suspended in the air, causing the model locomotive to temporarily lose power or lose continuous signals. At present, almost all small-scale simulation railway locomotive models use a power mode of conductive rail power supply, which also puts high demands on the reliability of the wheel-rail contact relationship during dynamic operation. Therefore, these problems have great room for improvement. Summary of the invention

[0011] The purpose of the present invention is to design a new type of three-axle electric transmission locomotive model bogie, through reasonable transmission mechanism design, so that it has good power transmission and load-bearing capacity, while improving the three-dimensional space visual simulation effect as much as possible, combining the requirements of dynamic driving and static viewing, so that the railway locomotive model equipped with such a bogie assembly can run well on the track of corresponding proportions, and can also provide good simulation viewing effects under dynamic conditions during operation. On the other hand, this bogie, on the basis of good adaptation to mature processing industries and design specifications, provides future upgrade space through reasonable design, and provides a basic platform component that realizes more functions.

[0012] The technical solution adopted by the present invention is as follows:

[0013] A three-axle railway locomotive power model bogie and transmission device, comprising a gearbox, a frame connected to the outside of the gearbox, and a traction rod assembly connected to the bottom of the frame; wherein the gearbox comprises a gearbox control box at the top, a gearbox housing connected to three wheel groups, a power main shaft is arranged in the gearbox control box, one end of the power main shaft passes through the gearbox control box and is connected to a motor through a universal joint sleeve; a central speed change gear is connected to the lower part of the shaft body of the power main shaft, the central speed change gear is connected to an intermediate gear set, and the intermediate gear set is connected to a coaxial power gear; the intermediate gear set and the coaxial power gear form an M-type output path, the number of the coaxial power gears is 3, they are located at the end of the M-type output path and at the wheel body positions of the three wheel groups respectively, and there are recessed structures 1A and 1B between the three wheel groups;

[0014] The frame is formed by connecting the front beam, the rear beam, the left beam and the right beam end to end, and the frame is connected to the gear box housing; the axle box, the side bearing support and the crank arm seat are arranged on the left beam and the right beam; the crank arm seat is connected to the crank arm of the drawbar in the drawbar assembly;

[0015] The traction rod assembly includes a connecting rod, one end of which is hinged to one end of the traction rod crank arm, the other end of the traction rod crank arm is hinged to one end of the pull rod, a through groove connected to the crank arm seat is arranged at the inflection point of the traction rod crank arm, two ear plates are arranged on the crank arm seat and a pin is arranged between the ear plates, and the through groove is connected to the pin; the other end of the pull rod is connected to the traction seat base; the other end of the connecting rod is arranged in a mirror image.

[0016] Furthermore, the power main shaft adopts a worm shaft.

[0017] Furthermore, the gear box control box and the gear box housing are connected by bolts or buckles.

[0018] Further, the intermediate gear set includes a plurality of intermediate gears.

[0019] Furthermore, the gearbox also includes a motor hanging mount, and the number of the motor hanging mounts is 3.

[0020] Furthermore, the connecting rod is made of metal or plastic.

[0021] Furthermore, the number of the coaxial power gears is 3, and the coaxial power gear located in the middle is further horizontally positioned higher than the coaxial power gears on the left and right sides.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The gearbox adopts the design of M-type transmission route, which significantly relaxes the appearance constraints of the gearbox and can better simulate the three-dimensional structural outline of the traction motor compartment of many electric transmission diesel and electric locomotives in real environments. Especially for locomotives with higher bogie side beams and suspended and tie rod positioning suspension, it can achieve "unobstructed view" from the audience's perspective, greatly improving the degree of simulation.

[0024] 2. The design of the gearbox makes it possible to better simulate the motor compartment suspension of the electric locomotive and the combined structure of the traction motor compartment placed parallel to the axle. This allows the locomotive model to have the characteristics of appearance simulation when viewed from the bottom. This is an advantage that was previously limited by the transmission structure and can immediately achieve full-directional simulation instead of only being able to satisfy limited simulation of the sides and top.

[0025] 3. The gearbox structure using the M-type transmission path can use a relatively stable and efficient continuous gear transmission mechanism on the same plane as the angular velocity of the wheelset rotation while meeting the requirements of the above-mentioned appearance size restrictions, avoiding interference caused by other transmission methods such as the precession of the tangential transmission shaft in the direction of motion and wear on the gear mechanism. This design is compatible with the currently widely used main power motor-worm gear-gearbox transmission structure, does not damage the function of the gearbox, and does not rely too much on other components such as the body, greatly expanding the applicability, so that many products can be upgraded with this technology.

[0026] 4. The gearbox adopts a replaceable upper structure, which can simulate the real-world "fireless return" requirements on the power locomotive model through worm gear program control, electric control or mechanical control lifting, greatly improving the practicality of the railway locomotive model and expanding the dynamic application boundary.

[0027] 5. The closed enclosed frame improves the mechanical structural strength of the bogies used for the current miniature simulation of similar locomotives, and at the same time builds a relatively stable small parts assembly platform. This allows many parts that previously relied on the side beams to be remounted on the cross beams and provides a stable installation platform under normal model track driving conditions.

[0028] 6. Since the structure of the frame forms a stable frame structure with sufficient rigidity, the bogie design includes a variety of expansion methods connected to the vehicle body. The bogie can bear the weight of the vehicle body and provide traction by combining the gearbox with the frame, and then realizing free rotation and transmitting force to the vehicle body through the center plate part. It can also support the use of multi-point connection, separate from the gearbox load, and use the side bearing steering method to transmit power to the locomotive and play a supporting role for the bogie. At the same time, it provides a stable operating platform for the traction rod structure, realizing the dynamic full-time and all-round simulation of the traction rod.

[0029] 7. The traction rod structure on the model bogie can meet the model track capacity under the existing standards, which is significantly greater than the swing angle capacity of the actual vehicle in a reduced scale state. In this way, when the model user is statically viewing, the locomotive model of the present invention presents a very high degree of simulation. When operating dynamically, the present invention allows the model user and operator to not worry about the side bogie traction rod being unable to connect well with the locomotive, thereby limiting the swing amplitude of the bogie module relative to the locomotive body on the parallel plane of the track surface, greatly expanding the track operation condition restrictions of the locomotive with a three-axle electric transmission bogie structure.

[0030] 8. The three axes of the gearbox of this bogie design can be on different track surfaces, and the central axis is slightly higher than the front and rear axes. Specifically, in the widely used 1 / 87 or HO specification railway model system, the central axis is 0.1mm higher than the two side axes, so that the wheelset has good track adaptability. Since the tracks used by most miniature model railway locomotives are spliced ​​in sections, there is often a non-parallel track surface between two sections of the track, especially at the joints where the track turns to a larger slope, the same position of the three axes can easily cause most wheelsets to be suspended, reducing the static friction area of ​​the model locomotive and reducing power. At the same time, because most simulation railway locomotive models use track power supply mode, this is also prone to poor contact and other problems. The design of lifting the central axis can solve this problem, expand the degree of track adaptation and improve the reliability of the electrical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0032] Figure 1 is an exploded view of the bogie of the present invention;

[0033] Figure 2 is a three-dimensional diagram of a gearbox of which the present invention is a component;

[0034] Figure 3 is a rear view of the gearbox of which the present invention is a component;

[0035] Figure 4 It is a schematic diagram of the transmission route of the gear box of the present invention;

[0036] Figure 5 is a perspective view of a traction rod of which the present invention is a component;

[0037] Figure 6 It is a stereogram of the overall structure of the present invention;

[0038] Figure 7 It is a bottom view of the overall structure of the present invention from a first angle;

[0039] Figure 8 It is a bottom view of the overall structure of the present invention from a second angle;

[0040] Fig. 9 It is a bottom view of the overall structure of the present invention from a third angle;

[0041] Fig.10 is a partial enlarged view of the traction rod assembly of the present invention;

[0042] Fig.11 This is an example of the turning state of the 1 / 87 scale diesel locomotive dynamic simulation model of the present invention on a 450mm curve;

[0043] Markings in the figure:

[0044] 11-gearbox control box, 12-gearbox housing, 13-power spindle, 14-universal joint sleeve, 15-central speed change gear, 16-intermediate gear set, 17-coaxial power gear;

[0045] 21-left beam, 22-right beam, 23-front beam, 24-rear beam, 211-axle box, 212-side bearing, 213-crank arm seat;

[0046] 31-connecting rod, 32-connecting rod pin, 33-crank arm pin, 34-traction rod crook arm, 36-pull rod, 37-traction rod base;

[0047] 40-secondary suspension spring, 41-scanner, 42-brake cylinder, 43-motor suspension rod, 44-axle box shock absorber, 45-rear sand box, 47-front sand box, 49-single-side brake shoe, 48-oil bottle. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0050] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0052] Embodiment 1

[0053] The bogie and transmission device of this scheme are mainly composed of a frame structure surrounded by all sides to simulate the appearance of the model prototype, and a fixed external enclosure structure is formed by side beams and end beams. A gear box made of zinc alloy, copper or plastic is fixed to the frame appearance components by screws, bolts or splicing and gluing. The width of the gear box between the wheels is adjusted to meet the needs of the locomotive model running on the track. The gear box has multiple gears, and the coaxial gears corresponding to the three sets of wheels rotate at the same speed and in the same direction. The coaxial gears are meshed with multiple gears of appropriate sizes to transmit the same angular velocity. Assembly positions are arranged on the gear box and the surface in an appropriate manner to add independent auxiliary parts, and at the same time provide a basis for future upgrades to the tread brake simulation device that can be driven. The line connecting the centers of the gears in the gear box is not a straight line, but a plane where the vertical vector of the track plane is coplanar with the tangential vector of the current locomotive running direction, that is, an M-shaped transmission path is formed on the side of the locomotive in the eyes of most people. The transmission path allows the lower part of the gearbox to be reduced and allows two deep grooves to appear. There is no necessary structure of the gearbox between the two deep grooves. "No" means that there is no mechanical structure involved in the operation of the gearbox in the recessed structure below the gearbox.

[0054] Through the power main shaft 13 on the gearbox control box 11 and the universal joint sleeve 14 or other power transmission mechanism, the traction power output by the central motor is transferred to the coaxial power gear 17 where the wheel axle of the bogie is located through the central speed change gear 15 and the intermediate gear set 16 when the locomotive is turning or going straight. The gearbox can be composed of a gearbox control box 11 and a gearbox housing 12, which are tightly connected using bolts or snaps, and the frame 2 is fixed to the gearbox housing 12 by bolts or friction assembly positions. The number of specific gears in the central speed change gear 15, the coaxial power gear 17, and the intermediate gear set 16, the transmission ratio and the module of the gears can be changed according to actual needs. The shafts of the central speed change gear 15, the coaxial power gear 17, and the intermediate gear set 16 can be integrated with the gear wheel disc, or can be processed separately as a separate metal or non-metal rigid shaft. When the entire worm-gear power set is connected to the central output, the driving torque of the wheel axle far exceeds the weight of the wheelset loaded on the wheelset on the inclined track surface, preventing the model locomotive from slipping. The lower part of the gearbox is provided with simulated motor hanging seats 171, which should generally be three, and can be used to install the mounting accessories 43;

[0055] The overall transmission path shows an M-type transmission path, so that the bottom of the gearbox housing 12 can leave recessed structures 1A and 1B between the three parallel wheel axles. The shielding relationship between the left and right side beams 21 and 22 of the bogie and the gearbox. Due to the existence of 1A and 1B, there is a complete penetrating field of view when viewed from the side of the locomotive. When the observer observes from the side, the simulation effect at the height of the line of sight can be achieved, avoiding the interference of the gearbox of the traditional small-scale electric transmission diesel locomotive model on the line of sight.

[0056] Embodiment 2

[0057] In this embodiment, based on the first embodiment, the three wheelsets of the gearbox can be arranged so that the central wheelset is higher than the corresponding heights of the front and rear wheelsets, so as to adapt to the uphill and downhill joints of the model track and provide sufficient space for installing the wheelset tread rubber ring; the worm gear position connected to the gearbox and the main power motor has an independent modular structure, so that the worm gear can be separated from the gearbox below to cut off the power output; a simulated wheelset is used, which meets the tread of the industry standard and provides the appearance of a bright tread after simulated wear, and can be replaced with wheelsets compatible with a variety of power supply systems; the appearance of the gearbox has a specific contour line, which can simulate the structure of a real electric locomotive; it has the ability to obtain electrical energy or analog and digital electronic signals of corresponding standards from the track through metal springs or bearings.

[0058] Embodiment 3

[0059] This embodiment is based on the second embodiment: the gearbox control box 11 is an independent component. This allows the power main shaft 13 to be separated from the transmission shaft when the gearbox control box 11 is driven by a controlled lifting assembly, thereby achieving self-locking decoupling of the main power worm gear device. The frame is a frame consisting of multiple components, made of alloy or plastic, generally composed of a left beam 21, a right beam 22, a front beam 23, and a rear beam 24. The left beam 21 or the right beam 22 has an axle box 211 for presenting appearance attributes and a side bearing support 212. The side bearing support can expand the side bearing accessories for stable steering. The enclosed structure is a stable frame rigidly connected to the intermediate gearbox, and can be expanded with various accessories required for appearance and function according to the needs of the model. The crank arm seats 213 on both sides are connected to the traction rod crank arm 34.

[0060] Embodiment 4

[0061] This embodiment is based on the third embodiment; the frame has a connecting rod 31, and a pair of traction rod crank arms 34 are connected by connecting rod pins 32 at both ends. The traction rod crank arm 34 is connected to the pull rod 36 through the crank arm pin 33, and the pull rod 36 is further connected to the traction rod base; a through groove connected to the crank arm seat 213 is set at the turning point of the traction rod crank arm 34, two ear plates are set on the crank arm seat 213, and a pin is set between the ear plates, and the through groove is connected to the pin.

[0062] The two traction rod crank arms 34 are connected by a connecting rod 31. The connecting rod 31 is a long rod with holes at both ends, which is naturally straightened when not under force and has a certain rigidity. The connecting rod pin 32 or a pin-shaped structure extending from the traction rod crank arm 34 is connected to the traction rod crank arms 34 on both sides. The traction rod crank arm 34 rotates around the connecting rod pin 32 as an axis. The connecting rod 31 can be adjusted and designed to be a long rod with a certain deflection after being subjected to force according to different specific conditions such as the friction coefficient of the material of the force transmission component, and can be made of metal or plastic.

[0063] The traction rod crank arm 34 is placed on a plane perpendicular to the connecting rod pin 32 and inserted into the crank arm seat 213. A through slot connected to the crank arm seat 213 is set at the turning point of the traction rod crank arm 34. Two ear plates are set on the crank arm seat 213 and a pin is set between the ear plates. The through slot is connected to the pin. The through slot is designed to be in accordance with the actual needs and in a shape that conforms to the rotation path of the bogie to ensure that the notch is sleeved on the column head of the crank arm seat during the entire movement. Usually, this through slot can be designed to open forward, that is, on the opposite side of the worm gear universal joint relative to the rotation axis or on the opposite side of the locomotive where the crank arm is located, so that the product can be installed smoothly during assembly.

[0064] Since the position of the crank arm seat 213 relative to the bogie body is constant, the pin of the crank arm seat 213 acts as a constraint, so that the combination of the connecting rod 31 and the two traction rod crank arms 34 swings in the same direction when swinging. The traction rod crank arm 34 is connected to the single-side pull rod 36 and is sleeved in the gap formed by the traction rod base inner component and the traction rod base outer component with a non-circular hole structure.

[0065] The swing state of the entire bogie is shown. At this time, the traction rod crank arm 34 is fixed in the crank arm seat 213. On the parallel plane of the track surface, the traction rod crank arm 34 rotates in the same direction. When the bogie rotates counterclockwise, the traction rod crank arm 34 rotates counterclockwise, and when it rotates clockwise, the traction rod crank arm 34 rotates clockwise. During rotation, the crank arm pin 33 moves in the same direction and opposite direction relative to the forward direction of the locomotive on the parallel plane of the track surface. The non-circular hole provides a clearance for forward and backward movement on the hook, ensuring that the pull rod is constrained on the hook of the traction rod base 37 and will not fall off. Correspondingly, the non-circular hole allows the crank arm pin 33 to be constrained on the hook of the traction rod base 37 and will not fall off. During the normal operation or transportation and moving process of the model locomotive, the motion combination allows the various components of the motion system to swing and rotate normally on the parallel plane of the track surface due to the comprehensive force relationship with the car body and the bogie in all directions.

[0066] like Figure 8 As shown, the bogie as a whole is in contact with the bottom of the vehicle body by the convex point of the center plate support, and the center pin of the center plate serves as the swing axis of the bogie relative to the vehicle body. The convex point and the center pin of the center plate can also be replaced by miniature bearings.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-axle railway locomotive power model bogie and transmission device, Features: It includes a gearbox, a frame connected to the outside of the gearbox, and a traction rod assembly connected to the bottom of the frame; wherein, The gearbox comprises a gearbox control box (11) at the top and a gearbox housing (12) connected to three groups of wheels. A power main shaft (13) is arranged in the gearbox control box (11). One end of the power main shaft (13) passes through the gearbox control box (11) and is connected to the motor through a universal joint sleeve (14). A central speed change gear (15) is connected below the shaft of the power main shaft (13). The central speed change gear (15) is connected to an intermediate gear set (16). The intermediate gear set (16) is connected to a coaxial power gear (17). The intermediate gear set (16) and the coaxial power gear (17) form an M-shaped output path. The number of the coaxial power gears (17) is 3 and they are located at the end of the M-shaped output path and at the wheel bodies of the three groups of wheels respectively. A recessed structure 1A and a recessed structure 1B are provided between the three groups of wheels. The frame is formed by connecting the front end beam (23), the rear end beam (24), the left side beam (21) and the right side beam (22) end to end, and the frame is connected to the gear box housing (12); the left side beam (21) and the right side beam (22) are both provided with an axle box (211), a side bearing support (212) and a crank arm seat (213); the crank arm seat (213) is connected to the traction rod crank arm (34) in the traction rod assembly; The traction rod assembly comprises a connecting rod (31), one end of the connecting rod (31) is hinged to one end of a traction rod crank arm (34), the other end of the traction rod crank arm (34) is hinged to one end of a pull rod (36), a through groove connected to a crank arm seat (213) is arranged at the inflection point of the traction rod crank arm (34), two ear plates are arranged on the crank arm seat (213), a pin is arranged between the ear plates, and the through groove is connected to the pin; the other end of the pull rod (36) is connected to a traction seat base (37); the other end of the connecting rod (31) is arranged in a mirror image.

2. A three-axle railway locomotive power model bogie and transmission device according to claim 1, Features: The power main shaft (13) adopts a worm shaft.

3. A three-axle railway locomotive power model bogie and transmission device according to claim 1, Features: The gear box control box (11) and the gear box housing (12) are connected via bolts or buckles.

4. A three-axle railway locomotive power model bogie and transmission device according to claim 1, Features: The intermediate gear set (16) includes a plurality of intermediate gears.

5. A three-axle railway locomotive power model bogie and transmission device according to claim 1, Features: The gear box also includes a motor hanging seat (18), and the number of the motor hanging seats (18) is 3.

6. A three-axle railway locomotive power model bogie and transmission device according to claim 1, Features: The connecting rod (31) is made of metal or plastic.

7. A three-axle railway locomotive power model bogie and transmission device according to claim 1, Features: The number of the coaxial power gears (17) is 3, and the coaxial power gear (17) located in the middle is horizontally higher than the coaxial power gears (17) on the left and right sides.

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