A non-fully loaded power axle for improving the traction of a rack railway train

Abstract

The present invention relates to a non-fully loaded power shaft for improving the traction of a rack train, comprising a power shaft frame, one end of the power shaft frame can be connected to the bogie frame of the bogie through a multi-link traction mechanism, the other end of the power shaft frame can be connected to the bottom of the body of the rack train through a secondary spring, a single-axis rack drive device is provided on the power shaft frame, the single-axis rack drive device can provide traction in the line rack section, and the multi-link traction mechanism enables the power shaft frame to only move horizontally relative to the bogie frame in the vertical direction. The power shaft of the present invention is connected to one side of the bogie, and in a large slope section, the power shaft and the ground rack generate traction, and the traction is transmitted to the bogie through the multi-link traction mechanism, so that the traction train runs on a larger slope, and in a small slope and wheel-rail section, the power shaft does not participate in the drive, and only acts as a follower component, and the multi-link traction mechanism effectively suppresses the nodding movement of the power shaft itself.

Description

Technical Field

[0001] The present invention relates to the technical field of rack railways, and in particular to a non-fully loaded power axle for improving the traction of a rack railway train. Background Technology

[0002] Currently, there are two main types of rack railways in the world. One type is a pure rack railway with rack tracks throughout the line, which is suitable for short-distance transportation within scenic areas. The other type of rack railway is a hybrid rack railway where vehicles can run on both rack tracks and conventional steel rail lines without changing.

[0003] At present, the domestic mountain rack railway system is still in its infancy. The planned lines are all rack railways that are a mixture of rack and rail lines. There are two main types of vehicles that are suitable for this type of rack railway:

[0004] The first type is that the train is equipped with both adhesion bogies and rack bogies, which are driven separately in the adhesion section and the rack section. This type of vehicle is subject to the power of the axle drive system and the loading ratio of the rack bogie. As a result, the maximum slope of this type of rack vehicle on the conventional rail line is generally no more than 40‰, and the slope on the rack line is generally no more than 160‰, which makes the planning of the rack line in mountainous areas more difficult, the infrastructure cost is high, and the construction economy is poor. This type of vehicle has a relatively simple structure and relatively mature technology.

[0005] The second type of train is to install a clutch device on the bogie, through which the clutch device outputs power to the drive gear and steel wheel respectively. This type of bogie structure is extremely complex and has many risk points. Due to the large difference in the speed of the two drive modes, extremely high requirements are placed on the motor and traction transformer. Although this type of vehicle can reach a larger slope and a higher operating speed, there are no application cases at home and abroad, and the research and development is difficult. The reliability and stability require long-term verification.

[0006] Therefore, if Figure 1 As shown in , for the first type of train with both adhesion bogies and rack bogies, the total number of bogies is limited, and the adhesion running capacity and rack running capacity cannot be taken into account. SUMMARY OF THE INVENTION

[0007] The purpose of the present invention is to provide a non-fully loaded power axle for improving the traction of the rack rail train in view of the problem that the total amount of bogies is limited and the adhesion running capacity and the rack rail running capacity cannot be taken into account in the existing rack rail train with both adhesion bogies and rack rail bogies in the prior art.

[0008] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0009] A non-fully loaded power axle for enhancing the traction force of a rack-rail train, comprising a power axle framework. One end of the power axle framework can be connected to the bogie framework of a bogie through a multi-link traction mechanism. The other end of the power axle framework can be connected to the bottom of the rack-rail train car body through a secondary spring. A single-axis rack-rail drive device is provided on the power axle framework, and the single-axis rack-rail drive device can provide traction force on the rack-rail section of the line. The multi-link traction mechanism enables the power axle framework to only translate relative to the bogie framework in the vertical direction.

[0010] Wherein, the bogie is an adhesion bogie or a rack-rail bogie.

[0011] In the existing rack-rail train, there are only two bogies for a single car body. When the slope of the rack-rail section of the line increases, it is necessary to increase the number of rack-rail bogies and correspondingly reduce the number of adhesion bogies, which will lead to a decline in the running performance of the train in the adhesion section. The non-fully loaded power axle for enhancing the traction force of a rack-rail train according to the present invention is connected to one side of the bogie. On a large-slope section, the power axle acts with the ground rack-rail to generate traction force, and the traction force is transmitted to the bogie through the multi-link traction mechanism, thereby pulling the train to run on a greater slope. On a small-slope and wheel-rail section, the power axle does not participate in driving and only serves as a follow-up component. That is, while increasing the rack-rail climbing ability of the train, it does not affect its adhesion running performance. At the same time, the multi-link traction mechanism enables the power axle framework to only translate relative to the bogie framework in the vertical direction, so that the power axle framework cannot rotate around the horizontal axis, effectively suppressing the nodding motion of the power axle itself and ensuring that the single-axis rack-rail drive device can accurately mesh with the rack-rail. This power axle has a simple structure, is convenient to use, and has good effects.

[0012] Preferably, the multi-link traction mechanism includes several connecting rods. Rotating joints are respectively provided at both ends of the connecting rods. The rotating joint at one end is connected to the power axle framework, and the rotating joint at the other end is used to connect to the bogie framework. All the connecting rods are arranged in a column at intervals in the vertical direction.

[0013] Adopting this structure, the power axle framework and the bogie framework form a parallelogram kinematic pair in the vertical direction through the multi-link traction mechanism, so that the power axle framework can only translate relative to the bogie framework in the vertical direction and cannot rotate around the horizontal axis.

[0014] Further preferably, the rotating joint is a rubber joint, and the rubber joint can buffer the vibration and impact during the traction process.

[0015] Preferably, the single-axle gear-rail drive device includes a primary spring, a primary vertical shock absorber, a suspension frame, a powered axle, and a gear shaft. The suspension frame is respectively connected to the powered axle and the bogie frame. A wheel is provided on the powered axle, and the wheel is adapted to be disposed on a rail. A drive gear is provided on the gear shaft, and the drive gear is adapted to engage with a gear rail.

[0016] Further preferably, the wheel is annular and is connected to an eccentric disk through a rolling bearing. The wheel can rotate freely around the eccentric disk. The powered axle and the eccentric disk are integrally formed members or are connected by interference fit. A plurality of positioning holes are provided on the eccentric disk, and the eccentric disk is connected to a wheel axle box through the positioning holes. There is no relative movement between the wheel axle box and the eccentric disk, that is, the powered axle is relatively fixed to the powered axle frame.

[0017] With this structure, when the wheel diameter decreases, by rotating the angle of the eccentric disk and changing the center position of the powered axle, the height of the powered axle can be adjusted, thereby avoiding the influence of wheel wear on the engagement of the gear and the gear rail.

[0018] Further preferably, the single-axle gear-rail drive device further includes a gear-rail braking device, a gear-rail box mounting bracket, a gear box, a coupling, and a drive motor. The gear-rail braking device, the gear box, and the drive motor are provided on the suspension frame. The gear shaft is provided between the gear-rail braking device and the gear box. The gear box and the drive motor are connected through the coupling. The gear-rail box mounting bracket is connected to the powered axle, and the gear box is connected to the gear-rail box mounting bracket.

[0019] Further preferably, the gear box and the gear-rail box mounting bracket are connected by a suspension rod or a flexible connection.

[0020] Further preferably, a double-layer frame is provided on the bogie frame and arranged vertically. A connecting plate is provided on the suspension frame. The connecting plate is disposed in the cavity between the double-layer frames. Threaded holes are provided on both the upper and lower double-layer frames. Bolts are threadedly connected to the threaded holes. Bolt positioning holes are provided at the top and bottom of the connecting plate, and the ends of the bolts are abutted against the bolt positioning holes.

[0021] With this structure, by rotating the bolts, the height of the connecting plate in the cavity between the double-layer frames can be adjusted, thereby adjusting the relative height between the bogie frame and the suspension frame. The bolts are provided both above and below because the bolts need a certain pre-tightening force for fastening, and the bolts above and below act simultaneously to tightly fix and position the connecting plate.

[0022] Further preferably, the single-axis rack drive device also includes a rack brake device, a rack box mounting frame, a gear box, a coupling, and a drive motor. The rack brake device and the drive motor are arranged on the suspension frame, and the suspension frame is respectively connected to the power wheel axle and the bogie frame, and at least one of them is a flexible connection. The gear shaft is arranged between the rack brake device and the gear box, and the gear box and the drive motor are connected through the coupling. The rack box mounting frame is connected to the power wheel axle, and the gear box is respectively connected to the rack box mounting frame and the bogie frame, and at least one of them is a flexible connection.

[0023] With this structure, at least one of the connections between the suspension frame and the power wheel axle and the bogie frame is a flexible connection, and at least one of the connections between the gear box and the rack box mounting frame and the bogie frame is a flexible connection, so as to release the relative movement between the power axle and the bogie frame.

[0024] Further preferably, the single-axis rack drive device also includes a rack brake device, a gear box, a coupling, and a drive motor. The gear shaft is replaced with a hollow shaft, and the hollow shaft is sleeved outside the power wheel axle. The rack brake device, the drive gear, and the gear box are connected to the hollow shaft. The rack brake device is connected to the power axle frame through the suspension frame, and the gear box is flexibly connected to the bogie frame. The drive motor is connected to the gear box through the coupling, and the drive motor is flexibly connected to the bogie frame through the suspension frame.

[0025] With this structure, the original gear shaft is replaced with a hollow shaft, so that the drive gear and the wheel are coaxially arranged, saving the rack box mounting frame, and the entire power shaft structure is more compact, so that the vehicle can pass through curves more smoothly.

[0026] The present invention also provides a rack rail vehicle, comprising a plurality of car bodies connected end to end in sequence, wherein an adhesive bogie and a rack rail bogie are respectively arranged at the bottom of both ends of each car body, and the adhesive bogie and / or the rack rail bogie of at least one car body is connected to a non-fully loaded power axle for improving the traction of the rack rail train as described in any of the above items.

[0027] The rack rail vehicle described in the present invention effectively solves the problem that the rack rail train cannot take into account both strong adhesion running performance and strong rack rail climbing ability. It can ensure the rack rail climbing ability while having strong adhesion running performance; the configuration number of the power axle can be flexibly selected according to the specific climbing requirements of the line; and it can be flexibly grouped according to the passenger capacity requirements of the train.

[0028] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0029] 1. The non-fully loaded power axle for enhancing the traction force of the rack rail train according to the present invention is connected to one side of the bogie. On steep sections, the power axle acts with the ground rack rail to generate traction force, and the traction force is transmitted to the bogie through the multi-link traction mechanism, thereby pulling the train to run on steeper gradients. On gentle gradients and wheel-rail sections, the power axle does not participate in driving and only serves as a follow-up component. That is, while increasing the rack rail climbing ability of the train, its adhesion running performance is not affected. At the same time, the multi-link traction mechanism enables the power axle frame to only translate relative to the bogie frame in the vertical direction, so that the power axle frame cannot rotate around the horizontal axis, effectively suppressing the nodding motion of the power axle itself and ensuring that the single-axle rack rail drive device can be accurately meshed with the rack rail. This power axle has a simple structure, is easy to use, and has good effects;

[0030] 2. The rack rail vehicle according to the present invention effectively solves the problem that the rack rail train cannot balance strong adhesion running performance and strong rack rail climbing ability. It can have strong adhesion running performance while ensuring the rack rail climbing ability; the configuration quantity of the power axle can be flexibly selected according to the specific climbing requirements of the line; and flexible formation can be carried out according to the passenger capacity requirements of the train. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of an existing rack rail train;

[0032] Figure 2 is a connection schematic diagram of the power axle of the present application;

[0033] Figure 3 is a schematic plan view of the power axle in Embodiment 1;

[0034] Figure 4 is a schematic elevation view of the multi-link traction mechanism in Embodiment 2 Figure 1 ;

[0035] Figure 5 is a schematic elevation view of the multi-link traction mechanism in Embodiment 2 Figure 2 ;

[0036] Figure 6 is a schematic elevation view of the height adjustment between the wheel and the power wheel axle in Embodiment 3 Figure 1 ;

[0037] Figure 7 is a schematic elevation view of the height adjustment between the wheel and the power wheel axle in Embodiment 3 Figure 2 ;

[0038] Figure 8Schematic elevation structure diagram of height adjustment between the suspension frame and the bogie frame in Embodiment 3 Figure 1 ;

[0039] Figure 9 Schematic elevation structure diagram of height adjustment between the suspension frame and the bogie frame in Embodiment 3 Figure 2 ;

[0040] Figure 10 Schematic plan structure diagram of the power shaft in Embodiment 4;

[0041] Figure 11 Schematic plan structure diagram of the power shaft in Embodiment 5.

[0042] Markings in the figure: 1 - power shaft, 101 - multi-link traction mechanism, 1011 - link, 1012 - rotating node, 102 - power shaft frame, 103 - primary spring, 104 - primary vertical shock absorber, 105 - secondary spring, 106 - rack rail braking device, 107 - suspension frame, 1071 - connecting plate, 1072 - bolt positioning hole, 108 - driving gear, 109 - power wheel shaft, 110 - rack rail box mounting frame, 111 - wheel, 112 - gear box, 113 - gear shaft, 114 - coupling, 115 - driving motor, 116 - rolling bearing, 117 - eccentric disc, 118 - positioning hole, 119 - bolt, 120 - hollow shaft, 2 - bogie, 201 - bogie frame, 2011 - double-layer frame, 202 - bogie wheel shaft. Detailed implementation manners

[0043] The present invention will be described in detail below with reference to the accompanying drawings.

[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to 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.

[0045] Embodiment 1

[0046] As shown in Figure 2 and Figure 3 , a non-fully loaded power shaft 1 for improving the traction force of a rack rail train according to the present invention includes a power shaft frame 102. One end of the power shaft frame 102 can be connected to the bogie frame 201 of the bogie 2 through a multi-link traction mechanism 101, and the other end of the power shaft frame 102 can be connected to the bottom of the rack rail train car body through a secondary spring 105. Among them, the bogie 2 is an adhesion bogie or a rack rail bogie, and a bogie wheel shaft 202 is connected to the bogie frame 201.

[0047] As shown in Figure 3As shown, a single-axis gear-rail drive device is provided on the power axle frame 102. The single-axis gear-rail drive device can provide traction force on the line gear-rail section. The multi-link traction mechanism 101 enables the power axle frame 102 to only translate relative to the bogie frame 201 in the vertical direction.

[0048] As Figure 3 shown, the single-axis gear-rail drive device includes a primary spring 103, a primary vertical shock absorber 104, a suspension bracket 107, a power wheel axle 109, a gear axle 113, a gear-rail braking device 106, a gearbox mounting bracket 110, a gearbox 112, a coupling 114, and a drive motor 115. The suspension bracket 107 is respectively connected to the power wheel axle 109 and the bogie frame 201. The power wheel axle 109 is connected to the power axle frame 102 through the primary spring 103 and the primary vertical shock absorber 104. A wheel 111 is provided on the power wheel axle 109, and the wheel 111 is used to be placed on the rail. The gear-rail braking device 106, the gearbox 112, and the drive motor 115 are arranged on the suspension bracket 107. The gear axle 113 is arranged between the gear-rail braking device 106 and the gearbox 112. A drive gear 108 is provided on the gear axle 113, and the drive gear 108 is used to engage with the gear-rail. The gearbox 112 and the drive motor 115 are connected through the coupling 114. The gearbox mounting bracket 110 is connected to the power wheel axle 109, and the gearbox 112 and the gearbox mounting bracket 110 are connected by a suspension rod or a flexible connection.

[0049] A non-fully loaded power axle 1 for improving the traction force of a gear-rail train according to this embodiment is connected to one side of the bogie 2. On a large slope section, the power axle 1 acts with the ground gear-rail to generate traction force, and the traction force is transmitted to the bogie 2 through the multi-link traction mechanism 101, so as to tow the train to run on a larger slope. On a small slope and wheel-rail section, the power axle 1 does not participate in driving and only serves as a follow-up component. That is, while increasing the gear-rail climbing ability of the train, its adhesion running performance is not affected. At the same time, the multi-link traction mechanism 101 enables the power axle frame 102 to only translate relative to the bogie frame 201 in the vertical direction, so that the power axle frame 102 cannot rotate around the horizontal axis, effectively suppressing the nodding movement of the power axle 1 itself, ensuring that the single-axis gear-rail drive device can be accurately meshed with the gear-rail. This power axle 1 has a simple structure, is convenient to use, and has good effects.

[0050] Embodiment 2

[0051] As Figure 4 and Figure 5As shown, for a non-fully loaded power axle 1 for enhancing the traction force of a rack and pinion train according to the present invention, on the basis of Embodiment 1, the multi-link traction mechanism 101 includes a plurality of connecting rods 1011.

[0052] In this embodiment, one set of the multi-link traction mechanism 101 includes two of the connecting rods 1011. Rotating joints 1012 are respectively provided at both ends of the connecting rod 1011. One of the rotating joints 1012 is connected to the power axle frame 102, and the other rotating joint 1012 is used to be connected to the bogie frame 201. All the connecting rods 1011 are arranged in a column at intervals in the vertical direction. The rotating joint 1012 is a rubber joint, and the rubber joint can buffer the vibration and impact during traction.

[0053] In this embodiment, the power axle frame 102 and the bogie frame 201 form a parallelogram kinematic pair in the vertical direction through the multi-link traction mechanism 101, so that the power axle frame 102 can only translate relative to the bogie frame 201 in the vertical direction and cannot rotate around the horizontal axis.

[0054] Embodiment 3

[0055] As Figure 6 and Figure 7 shown, for a non-fully loaded power axle 1 for enhancing the traction force of a rack and pinion train according to the present invention, on the basis of Embodiment 1 or Embodiment 2, the wheel 111 is annular and is connected to the eccentric disk 117 through a rolling bearing 116.

[0056] The wheel 111 can freely rotate around the eccentric disk 117. The power wheel axle 109 and the eccentric disk 117 are integrally formed components or are connected by interference fit. A plurality of positioning holes 118 are provided on the eccentric disk 117. The eccentric disk 117 is connected to the wheel axle box through the positioning holes 118, and there is no relative movement between the wheel axle box and the eccentric disk 117, that is, the power wheel axle 109 and the power axle frame 102 are relatively fixed.

[0057] In this embodiment, when the diameter of the wheel 111 is reduced, by rotating the angle of the eccentric disk 117, the central position of the power wheel axle 109 can be changed, and thus the height of the power wheel axle 109 can be adjusted, so as to avoid the influence of the wear of the wheel 111 on the meshing of the gear and the rack.

[0058] As Figure 8 and Figure 9As shown, a double-layer frame 2011 is provided on the bogie frame 201 in an up-and-down arrangement. A connecting plate 1071 is provided on the suspension frame 107. The connecting plate 1071 is arranged in the cavity between the double-layer frames 2011. Threaded holes are provided on both the upper and lower double-layer frames 2011. A bolt 119 is threadedly connected to the threaded hole. Bolt positioning holes 1072 are provided at the top and bottom of the connecting plate 1071. The end of the bolt 119 abuts against the bolt positioning hole 1072. With this structure, by rotating the bolt 119, the height of the connecting plate 1071 in the cavity between the double-layer frames 2011 can be adjusted, thereby adjusting the relative height between the bogie frame 201 and the suspension frame 107. The bolts 119 are provided both above and below because a certain pre-tightening force is required for the fastening of the bolts 119. The bolts 119 above and below act simultaneously to tightly fix and position the connecting plate 1071.

[0059] Embodiment 4

[0060] As Figure 10 shown, a non-fully loaded power shaft 1 for enhancing the traction force of a rack-rail train according to the present invention is different from any one of Embodiments 1 to 3 in that, in this embodiment, a rack brake device 106 and a drive motor 115 are provided on the suspension frame 107. The suspension frame 107 is respectively connected to the power wheel shaft 109 and the bogie frame 201, and at least one connection is a flexible connection. A gear shaft 113 is provided between the rack brake device 106 and the gearbox 112. The gearbox 112 and the drive motor 115 are connected by a coupling 114. The rack box mounting bracket 110 is connected to the power wheel shaft 109. The gearbox 112 is respectively connected to the rack box mounting bracket 110 and the bogie frame 201, and at least one connection is a flexible connection.

[0061] In the connection between the suspension frame 107 and the power wheel shaft 109 and the bogie frame 201 in this embodiment, at least one connection is a flexible connection. In the connection between the gearbox 112 and the rack box mounting bracket 110 and the bogie frame 201, at least one connection is a flexible connection, so as to release the relative movement between the power shaft 1 and the bogie frame 201.

[0062] Embodiment 5

[0063] As Figure 11As shown in the figure, a non-fully loaded power shaft 1 for enhancing the traction force of a tooth-rail train according to the present invention is different from any one of Embodiments 1 to 4 in that, in this embodiment, the single-shaft tooth-rail drive device does not include a tooth-rail box mounting bracket 110, the gear shaft 113 is replaced by a hollow shaft 120, the hollow shaft 120 is sleeved outside the power wheel shaft 109, the tooth-rail braking device 106, the drive gear 108, and the gear box 112 are connected to the hollow shaft 120, the tooth-rail braking device 106 is connected to the power shaft frame 102 through the suspension bracket 107, the gear box 112 is flexibly connected to the bogie frame 201, the drive motor 115 is connected to the gear box 112 through the coupling 114, and the drive motor 115 is flexibly connected to the bogie frame 201 through the suspension bracket 107.

[0064] In this embodiment, the original gear shaft 113 is replaced by a hollow shaft 120, so that the drive gear 108 and the wheel 111 are coaxially arranged, saving the tooth-rail box mounting bracket 110, and the structure of the entire power shaft 1 is more compact and small, and the vehicle is smoother when passing through a curve.

[0065] Embodiment 6

[0066] As Figure 2 shown in the figure, a tooth-rail vehicle according to the present invention includes a plurality of car bodies connected in sequence end to end. At each end bottom of each car body, an adhesion bogie and a tooth-rail bogie are respectively arranged, and the adhesion bogie and / or the tooth-rail bogie of at least one car body are connected with a non-fully loaded power shaft 1 for enhancing the traction force of a tooth-rail train as described in any one of Embodiments 1 to 5.

[0067] A tooth-rail vehicle described in this embodiment effectively solves the problem that a tooth-rail train cannot take into account both strong adhesion running performance and strong tooth-rail climbing ability. It can have strong adhesion running performance while ensuring the tooth-rail climbing ability; the configuration quantity of the power shaft 1 can be flexibly selected according to the specific climbing requirements of the line; and flexible formation can be carried out according to the passenger capacity requirements of the train.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A partially loaded power axle (1) for improving the traction of a rack railway train, characterized in that: The invention comprises a power axle frame (102), one end of which can be connected to a bogie frame (201) of a bogie (2) through a multi-link traction mechanism (101), and the other end of which can be connected to the bottom of a rack train body through a secondary spring (105). A single-axis rack drive device is provided on the power axle frame (102), and the single-axis rack drive device can provide traction force on a track rack section. The multi-link traction mechanism (101) enables the power axle frame (102) to move only in a vertical direction relative to the bogie frame (201); The multi-link traction mechanism (101) comprises a plurality of connecting rods (1011), and rotation nodes (1012) are respectively provided at both ends of the connecting rods (1011), the rotation node (1012) at one end is connected to the power shaft frame (102), and the rotation node (1012) at the other end is used to connect to the bogie frame (201), and all the connecting rods (1011) are arranged in a row at intervals along the vertical direction; The single-axis rack drive device comprises a series of springs (103), a series of vertical shock absorbers (104), a suspension frame (107), a power wheel axle (109), and a gear shaft (113); the suspension frame (107) is connected to the power wheel axle (109) and the bogie frame (201) respectively; a wheel (111) is provided on the power wheel axle (109); and a driving gear (108) is provided on the gear shaft (113).

2. The partially loaded power axle (1) for improving the traction of a rack railway train according to claim 1, characterized in that: The rotation node (1012) is a rubber node.

3. The partially loaded power axle (1) for improving the traction of a rack railway train according to claim 1, characterized in that: The wheel (111) is annular and connected to an eccentric disk (117) via a rolling bearing (116); the power wheel shaft (109) and the eccentric disk (117) are integrally formed components or connected by interference fit; a plurality of positioning holes (118) are provided on the eccentric disk (117); and the eccentric disk (117) is connected to a wheel axle box via the positioning holes (118).

4. The partially loaded power axle (1) for improving the traction of a rack railway train according to claim 1, characterized in that: The single-axis rack drive device further comprises a rack brake device (106), a rack box mounting frame (110), a gear box (112), a coupling (114), and a drive motor (115); the rack brake device (106), the gear box (112), and the drive motor (115) are arranged on the suspension frame (107); the gear shaft (113) is arranged between the rack brake device (106) and the gear box (112); the gear box (112) and the drive motor (115) are connected via the coupling (114); the rack box mounting frame (110) is connected to the power wheel axle (109); and the gear box (112) and the rack box mounting frame (110) are connected.

5. The partially loaded power axle (1) for improving the traction of a rack railway train according to claim 4, characterized in that: The bogie frame (201) is provided with a double-layer frame (2011) arranged up and down, and the suspension frame (107) is provided with a connecting plate (1071). The connecting plate (1071) is arranged in a cavity between the double-layer frames (2011). The upper and lower double-layer frames (2011) are both provided with threaded holes, and the threaded holes are threadedly connected with bolts (119). The top and bottom of the connecting plate (1071) are both provided with bolt positioning holes (1072), and the ends of the bolts (119) are tightly pressed against the bolt positioning holes (1072).

6. The partially loaded power axle (1) for improving the traction of a rack railway train according to claim 1, characterized in that: The single-axis rack drive device also includes a rack brake device (106), a rack box mounting frame (110), a gear box (112), a coupling (114), and a drive motor (115). The rack brake device (106) and the drive motor (115) are arranged on the suspension frame (107). The suspension frame (107) is connected to the power wheel axle (109) and the bogie frame (201) respectively, and at least one of them is a flexible connection. The gear shaft (113) is arranged between the rack brake device (106) and the gear box (112). The gear box (112) and the drive motor (115) are connected via the coupling (114). The rack box mounting frame (110) is connected to the power wheel axle (109). The gear box (112) is connected to the rack box mounting frame (110) and the bogie frame (201) respectively, and at least one of them is a flexible connection.

7. The partially loaded power axle (1) for improving the traction of a rack railway train according to claim 1, characterized in that: The single-axis rack drive device also includes a rack brake device (106), a gear box (112), a coupling (114), and a drive motor (115); the gear shaft (113) is replaced by a hollow shaft (120); the hollow shaft (120) is sleeved outside the power wheel shaft (109); the rack brake device (106), the drive gear (108), and the gear box (112) are connected to the hollow shaft (120); the rack brake device (106) is connected to the power shaft frame (102) through the suspension frame (107); the gear box (112) is flexibly connected to the bogie frame (201); the drive motor (115) is connected to the gear box (112) through the coupling (114); and the drive motor (115) is flexibly connected to the bogie frame (201) through the suspension frame (107).

8. A rack-and-rail vehicle, characterized in that: The invention comprises a plurality of car bodies connected end to end in sequence, wherein a bonding bogie and a rack bogie are respectively arranged at the bottom of both ends of each car body, and the bonding bogie and / or the rack bogie of at least one car body is connected to a non-fully loaded power axle (1) for improving the traction force of a rack train as described in any one of claims 1 to 7.

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