Gear box device for rail maintenance vehicle

Abstract

The utility model provides a gear box device for a rail maintenance vehicle. The gear box device comprises an input shaft assembly, a middle shaft assembly, an output shaft assembly and a shell. One end of the output shaft assembly is mounted in the shell, and the other end extends out of the cavity and is connected with a traction motor; the intermediate shaft assembly and the output shaft assembly are installed in the shell, and the input shaft assembly and the output shaft assembly are engaged with the intermediate shaft assembly. The hanging assembly comprises a hanging arm, a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are installed at the two ends of the hanging arm respectively, the first connecting piece is used for being connected with a vehicle body, and the second connecting piece is used for being connected with a shell. Hydraulic transmission is replaced by gear transmission, high-speed walking and low-speed maintenance of the gear box device can be achieved without filling a large amount of gear oil, and the maintenance cost is saved. The gear box device is installed on the vehicle body through the hanging assembly, connection is stable, falling is not prone to occurring, and the stability of the gear box device installed on the vehicle body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of track maintenance vehicles, in particular to a gear box device for a track maintenance vehicle. Background Art

[0002] With the rapid development of rail transit and the increasing experience in operation and maintenance, the maintenance and repair of rail lines has become increasingly demanding, and the requirements for line maintenance efficiency and precision are increasing. Therefore, subway companies are in urgent need of efficient, highly reliable, and low-maintenance subway track maintenance vehicles. To improve operational efficiency, track maintenance vehicles must reach the work area at the fastest speed, while operating at a low, uniform speed and maintaining high precision. Therefore, the transmission system of track maintenance vehicles must be able to operate in both high-speed traction and low, constant speed conditions, and must be able to easily switch between the two operating conditions. Due to the special operating conditions of track maintenance vehicles, hydraulic transmission axle gearboxes are often used to ensure that the maintenance vehicles can achieve both high-speed traction and low, constant speed operations. Hydraulic transmission is not only costly but also requires a large amount of gear oil, which can easily lead to complex gearbox structures or poor thermal balance performance. Utility Model Content

[0003] One of the purposes of the present utility model is to provide a gearbox device for a track maintenance vehicle, so as to solve the problem of high cost of the hydraulic transmission method in the prior art.

[0004] In order to achieve the above purpose, the technical solutions adopted by this utility model are as follows:

[0005] A gearbox device for a track maintenance vehicle comprises: an input shaft assembly, an intermediate shaft assembly, an output shaft assembly and a housing, wherein the housing comprises a first housing and a second housing, the first housing and the second housing being interlocked to form a cavity; one end of the input shaft assembly is mounted in the cavity, and the other end extends out of the cavity and is connected to a traction motor; the intermediate shaft assembly and the output shaft assembly are mounted in the cavity; the input shaft assembly comprises an input gear shaft, which is supported in the cavity by a four-point angular contact ball bearing and two cylindrical roller bearings; the intermediate shaft assembly is mounted in the cavity The shaft assembly includes an intermediate gear shaft and an intermediate driven wheel, the intermediate driven wheel is meshed with the intermediate gear shaft, and the intermediate driven wheel is meshed with the input gear shaft; the output shaft assembly includes an axle and an output gear, the output gear is mounted on the axle, and the output gear is meshed with the intermediate gear shaft; the hanging assembly includes a hanging arm, a first connecting member and a second connecting member, the first connecting member and the second connecting member are respectively mounted at both ends of the hanging arm, the first connecting member is used to connect to the vehicle body, and the second connecting member is used to connect to the outer shell.

[0006] According to the above technical means, gear transmission is used instead of hydraulic transmission, and high-speed travel and low-speed maintenance of the gearbox device can be achieved without adding a large amount of gear oil, saving maintenance costs; the gearbox device is installed on the vehicle body through the above-mentioned hanging assembly, and the connection is firm and not easy to fall, ensuring the stability of the gearbox device installed on the vehicle body, and at the same time ensuring that the gearbox device can work stably and effectively, ensuring the continuous stability of the track maintenance vehicle during operation.

[0007] Furthermore, first face-to-face tapered roller bearings are respectively provided at both ends of the intermediate gear shaft, and the two first face-to-face tapered roller bearings cooperate with each other to support the intermediate gear shaft in the cavity; second face-to-face tapered roller bearings are respectively provided at both ends of the output gear, and the two second face-to-face tapered roller bearings cooperate with each other to support the output gear in the cavity.

[0008] According to the above technical means, the first face-to-face tapered roller bearings and the second face-to-face tapered roller bearings can simultaneously withstand radial and axial loads. When the intermediate gear shaft and the output gear are subjected to complex loads during operation, the first face-to-face tapered roller bearings and the second face-to-face tapered roller bearings can provide stable support; the face-to-face installation method enhances the stiffness of the first face-to-face tapered roller bearings and the second face-to-face tapered roller bearings, which is beneficial to maintaining the stability of the intermediate gear shaft and the output gear and reducing wear caused by vibration and impact.

[0009] Furthermore, the intermediate shaft assembly also includes a first bearing seat, and the first face-to-face tapered roller bearing is installed on the first bearing seat; the output shaft assembly also includes a second bearing seat, and the second face-to-face tapered roller bearing is installed on the second bearing seat.

[0010] According to the above technical means, the first bearing seat and the second bearing seat provide a stable installation foundation for the first face-to-face tapered roller bearing and the second face-to-face tapered roller bearing, ensuring the stability and precision of the first face-to-face tapered roller bearing and the second face-to-face tapered roller bearing during the installation process, thereby reducing errors and vibrations caused by improper installation.

[0011] Furthermore, the input shaft assembly also includes a third bearing seat and a fourth bearing seat, the four-point angular contact ball bearing and one cylindrical roller bearing are mounted on the third bearing seat; the other cylindrical roller bearing is mounted on the fourth bearing seat.

[0012] According to the above technical means, the third bearing seat and the fourth bearing seat provide a stable installation foundation for the four-point angular contact ball bearing and the cylindrical roller bearing, ensuring the stability and precision of the four-point angular contact ball bearing and the cylindrical roller bearing during the installation process, thereby reducing errors and vibrations caused by improper installation; at the same time, the space is optimized, making the internal structure of the gearbox device compact.

[0013] Furthermore, an oil collecting tank is formed on the inner side wall of the first shell, and the oil collecting tank is used to store lubricating oil; oil channels are formed on the inner side walls of the first shell and the second shell, and the oil inlet ends of the oil channels are connected to the oil collecting tank, and the oil channels are configured to be able to transport the lubricating oil in the oil collecting tank to the first bearing seat, the second bearing seat, the third bearing seat and the fourth bearing seat.

[0014] According to the above technical means, the oil collecting tank serves as a storage area for lubricating oil, which can ensure that sufficient lubricating oil is supplied to the first bearing seat, the second bearing seat, the third bearing seat and the fourth bearing seat; the lubricating oil is transported to the first bearing seat, the second bearing seat, the third bearing seat and the fourth bearing seat through the oil channel, thereby realizing centralized lubrication and improving the lubrication effect.

[0015] Furthermore, the first shell is formed with an observation window corresponding to the oil collecting tank, and the observation window is used for staff to observe the storage amount of lubricating oil in the oil collecting tank.

[0016] According to the above technical means, the observation window enables the staff to promptly discover the problem of insufficient or leaking lubricating oil, so as to take necessary maintenance measures to prevent equipment failure caused by poor lubrication.

[0017] Furthermore, the observation window upper cover is provided with a window cover, and the window cover is used to seal the observation window.

[0018] According to the above technical means, the window cover tightly covers the observation window, forming an effective seal, which can prevent the lubricating oil in the oil collecting tank from leaking to the outside of the shell through the observation window. At the same time, it can also prevent external dust, moisture and other impurities from entering the oil collecting tank through the observation window, thereby avoiding contamination of the lubricating oil in the oil collecting tank.

[0019] Furthermore, a refueling hole and an oil drain hole are provided on the second shell, and the refueling hole and the oil drain hole are connected to the cavity and the outside of the cavity respectively; the refueling hole is used for the staff to inject lubricating oil into the cavity, and the oil drain hole is used for the staff to drain the lubricating oil in the cavity.

[0020] According to the above technical means, the filling hole enables the staff to easily inject lubricating oil into the cavity, ensuring that there is sufficient lubricating oil in the cavity; the oil drain hole allows the staff to release the lubricating oil in the cavity for replacement or cleaning when necessary, which is conducive to maintaining the cleanliness of the lubricating oil in the cavity and preventing equipment failure due to aging or contamination of the lubricating oil.

[0021] Furthermore, an oil level observation hole is formed on the second shell, and the oil level observation hole is used for staff to observe the oil level in the cavity.

[0022] According to the above technical means, the oil level observation hole provides an intuitive window, allowing staff to observe the oil level in the cavity in real time and quickly determine whether lubricating oil needs to be added or released, which is conducive to ensuring that the lubricating oil in the cavity is always maintained at an appropriate level, avoiding damage to the equipment caused by excessively high or low oil levels, thereby simplifying the maintenance process.

[0023] Furthermore, the first connecting member includes a first rubber node and a first bolt, and the first rubber node and the first bolt cooperate with each other to mount one end of the boom on the vehicle body; the second connecting member includes a second rubber node and a second bolt, and the second rubber node and the second bolt cooperate with each other to mount the other end of the boom on the housing.

[0024] According to the above technical means, the first rubber node and the second rubber node cooperate with the first bolt and the second bolt respectively to provide a stable connection force, ensuring that the connection between the two ends of the boom and the vehicle body and the shell is stable and reliable, and this design can withstand a large load and reduce the safety risks caused by loose or broken connections; at the same time, the first rubber node and the second rubber node have certain elasticity and buffering properties, which can absorb and disperse the vibration and impact force generated by the boom during operation, protecting the boom from damage.

[0025] The beneficial effects of the present invention are:

[0026] The utility model utilizes gear transmission instead of hydraulic transmission, and can realize high-speed travel and low-speed maintenance of the gear box device without adding a large amount of gear oil, thus saving maintenance costs; the gear box device is installed on the vehicle body through the hanging assembly, and the connection is firm and not easy to fall, thereby ensuring the stability of the gear box device installed on the vehicle body, and at the same time ensuring that the gear box device can work stably and effectively, thereby ensuring the continuous stability of the track maintenance vehicle during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the cross-sectional structure of the gearbox device of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure in which the traction motor of the utility model is installed at the other end of the input shaft assembly;

[0030] Figure 3 This is a schematic diagram of the installation structure of the gearbox device of the utility model;

[0031] Figure 4 This is a side structural diagram of the gearbox device of the utility model;

[0032] Figure 5 This is the second schematic cross-sectional structure diagram of the gearbox device of the present invention;

[0033] Figure 6 It is a schematic diagram of the top structure of the gear box device of the present invention.

[0034] in,

[0035] 100, input shaft assembly; 110, input gear shaft; 120, four-point angular contact ball bearing; 130, cylindrical roller bearing; 140, third bearing seat; 150, fourth bearing seat; 200, intermediate shaft assembly; 210, intermediate gear shaft; 220, intermediate driven gear; 230, first face-to-face tapered roller bearing; 240, first bearing seat; 310, axle; 320, output gear; 330, second face-to-face tapered roller bearing; 340, second shaft Support; 400, outer shell; 410, first shell; 411, oil collecting tank; 412, oil channel; 413, observation window; 414, window cover; 420, second shell; 421, oil filling hole; 422, oil drain hole; 423, oil level observation hole; 500, traction motor; 600, suspension assembly; 610, suspension arm; 620, first connecting member; 621, first rubber node; 630, second connecting member; 631, second rubber node; 632, second bolt. DETAILED DESCRIPTION

[0036] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. The accompanying drawings are for illustrative purposes only and are not to be construed as limiting the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for the purpose of illustrating the present invention and are not intended to limit the scope of protection of the present invention.

[0037] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0038] This embodiment provides Figures 1 to 6 The gearbox device for a track maintenance vehicle shown in the figure includes: an input shaft assembly 100, an intermediate shaft assembly 200, an output shaft assembly and a housing 400. The housing 400 includes a first housing 410 and a second housing 420. The first housing 410 and the second housing 420 are interlocked to form a cavity. One end of the input shaft assembly 100 is installed in the cavity, and the other end extends out of the cavity and is connected to the traction motor 500. The intermediate shaft assembly 200 and the output shaft assembly are installed in the cavity. The input shaft assembly 100 includes an input gear shaft 110, which is supported in the cavity by a four-point angular contact ball bearing 120 and two cylindrical roller bearings 130. The intermediate shaft assembly 200 includes a plurality of cylindrical roller bearings 130. The intermediate gear shaft 210 and the intermediate driven wheel 220 are meshed with the intermediate gear shaft 210, and the intermediate driven wheel 220 is meshed with the input gear shaft 110; the output shaft assembly includes an axle 310 and an output gear 320, the output gear 320 is installed on the axle 310, and the output gear 320 is meshed with the intermediate gear shaft 210; the hanging component 600 includes a hanging arm 610, a first connecting member 620 and a second connecting member 630, the first connecting member 620 and the second connecting member 630 are respectively installed at both ends of the hanging arm 610, the first connecting member 620 is used to connect to the vehicle body, and the second connecting member 630 is used to connect to the shell 400.

[0039] When the track maintenance vehicle needs to run quickly to the track section that needs to be inspected, the traction motor 500 inputs a higher speed to the input shaft assembly 100, and the input shaft assembly 100 transmits the kinetic energy to the output shaft assembly in the form of gear transmission, which can drive the axle 310 to move at a higher speed, further enabling the track maintenance vehicle to run to the maintenance site at a higher speed; when the track maintenance vehicle needs to inspect the track section that needs to be inspected at a slower constant speed, the traction motor 500 can input a stable low speed to the input shaft assembly 100, and transmit the stable low speed to the output shaft assembly through the intermediate shaft assembly 200, further enabling the track maintenance vehicle to travel at a lower constant speed to inspect the track.

[0040] In this embodiment, gear transmission is used instead of hydraulic transmission, and high-speed travel and low-speed maintenance of the gear box device can be achieved without adding a large amount of gear oil, saving maintenance costs; the gear box device is installed on the vehicle body through the hanging assembly 600, and the connection is firm and not easy to fall, ensuring the stability of the gear box device installed on the vehicle body, and at the same time ensuring that the gear box device can work stably and effectively, ensuring the continuous stability of the track maintenance vehicle during operation.

[0041] Preferably, the axes of the input gear shaft 110 , the intermediate gear shaft 210 , the output gear 320 and the axle 310 in this embodiment are parallel to each other.

[0042] Preferably, in this embodiment, the first shell 410 and the second shell 420 are buckled together and locked with a locking bolt.

[0043] More preferably, in this embodiment, the input gear shaft 110 and the rotor of the traction motor 500 are coupled via a coupling, and the coupling is connected to the input gear shaft 110 and the rotor of the traction motor 500 using a taper fit to transmit torque; the output gear 320 and the axle 310 are connected using an interference fit to transmit torque.

[0044] like Figure 1As shown, in this embodiment, first face-to-face tapered roller bearings 230 are respectively provided at both ends of the intermediate gear shaft 210. The two first face-to-face tapered roller bearings 230 cooperate with each other to support the intermediate gear shaft 210 within the cavity. Second face-to-face tapered roller bearings 330 are respectively provided at both ends of the output gear 320. The two second face-to-face tapered roller bearings 330 cooperate with each other to support the output gear 320 within the cavity. The first and second face-to-face tapered roller bearings 230, 330 can simultaneously withstand radial and axial loads. When the intermediate gear shaft 210 and the output gear 320 are subjected to complex loads during operation, the first and second face-to-face tapered roller bearings 230, 330 provide stable support. The face-to-face mounting arrangement enhances the rigidity of the first and second face-to-face tapered roller bearings 230, 330, and helps maintain the stability of the intermediate gear shaft 210 and the output gear 320, reducing wear caused by vibration and impact.

[0045] like Figure 1 As shown, in this embodiment, intermediate shaft assembly 200 further includes a first bearing seat 240, on which first face-to-face tapered roller bearing 230 is mounted; and output shaft assembly further includes a second bearing seat 340, on which second face-to-face tapered roller bearing 330 is mounted. First bearing seat 240 and second bearing seat 340 provide a stable mounting base for first face-to-face tapered roller bearing 230 and second face-to-face tapered roller bearing 330, ensuring the stability and precision of first face-to-face tapered roller bearing 230 and second face-to-face tapered roller bearing 330 during installation, thereby reducing errors and vibrations caused by improper installation.

[0046] like Figure 1 As shown, in this embodiment, the input shaft assembly 100 further includes a third bearing seat 140 and a fourth bearing seat 150. A four-point angular contact ball bearing 120 and a cylindrical roller bearing 130 are mounted on the third bearing seat 140; another cylindrical roller bearing 130 is mounted on the fourth bearing seat 150. The third bearing seat 140 and the fourth bearing seat 150 provide a stable mounting base for the four-point angular contact ball bearing 120 and the cylindrical roller bearing 130, ensuring stability and precision during installation of the four-point angular contact ball bearing 120 and the cylindrical roller bearing 130, thereby reducing errors and vibrations caused by improper installation. This also optimizes space and results in a compact internal structure of the gearbox assembly.

[0047] like Figure 5As shown, in this embodiment, an oil collecting groove 411 is formed on the inner sidewall of the first housing 410 for storing lubricating oil. An oil passage 412 is formed on the inner sidewalls of the first housing 410 and the second housing 420. The oil inlet end of the oil passage 412 is connected to the oil collecting groove 411, and the oil passage 412 is configured to transport the lubricating oil in the oil collecting groove 411 to the first bearing seat 240, the second bearing seat 340, the third bearing seat 140, and the fourth bearing seat 150. The oil collecting groove 411, as a storage area for lubricating oil, can ensure that sufficient lubricating oil is supplied to the first bearing seat 240, the second bearing seat 340, the third bearing seat 140, and the fourth bearing seat 150. The lubricating oil is transported to the first bearing seat 240, the second bearing seat 340, the third bearing seat 140, and the fourth bearing seat 150 through the oil passage 412, thereby achieving centralized lubrication and improving the lubrication effect.

[0048] Preferably, in this embodiment, the lubrication of the first face-to-face tapered roller bearing 230, the second face-to-face tapered roller bearing 330, the four-point angular contact ball bearing 120 and the cylindrical roller bearing 130 is achieved by utilizing the output gear 320 to rotate and splash oil, and receive lubrication through the oil channel 412 and oil holes on the housing 400; the lubrication of the input gear shaft 110, the intermediate gear shaft 210, the intermediate driven gear 220 and the output gear 320 is lubricated by the oil mist formed by the oil splashing of its own rotation.

[0049] like Figure 5 As shown, in this embodiment, the first housing 410 is formed with an observation window 413 corresponding to the oil collecting tank 411. The observation window 413 is used by a worker to observe the amount of lubricating oil stored in the oil collecting tank 411. The observation window 413 enables the worker to promptly detect problems such as insufficient lubricating oil or leakage, thereby taking necessary maintenance measures to prevent equipment failure caused by poor lubrication.

[0050] like Figure 5 and Figure 6 As shown, in this embodiment, a window cover 414 is provided on the observation window 413, and the window cover 414 is used to seal the observation window 413. The window cover 414 tightly covers the observation window 413, forming an effective seal, which can prevent the lubricating oil in the oil collecting tank 411 from leaking out of the housing through the observation window 413, and can also prevent external dust, moisture and other impurities from entering the oil collecting tank 411 through the observation window 413, thereby preventing the lubricating oil in the oil collecting tank 411 from being contaminated.

[0051] like Figure 4As shown, in this embodiment, the second housing 420 is provided with a refill hole 421 and an oil drain hole 422, which respectively connect the cavity to the exterior. Refill hole 421 allows staff to inject lubricating oil into the cavity, while oil drain hole 422 allows staff to drain the lubricating oil from the cavity. Refill hole 421 facilitates the injection of lubricating oil into the cavity, ensuring sufficient lubricating oil within the cavity. Oil drain hole 422 allows staff to drain the lubricating oil from the cavity for replacement or cleaning when necessary, thus maintaining the cleanliness of the lubricating oil within the cavity and preventing equipment failure due to lubricating oil aging or contamination.

[0052] like Figure 4 As shown, in this embodiment, the second housing 420 is further formed with an oil level observation hole 423, which is used by personnel to observe the oil level within the cavity. The oil level observation hole 423 provides an intuitive window, allowing personnel to observe the oil level within the cavity in real time and quickly determine whether lubricating oil needs to be added or released. This helps ensure that the lubricating oil in the cavity is always maintained at an appropriate level, preventing damage to the equipment caused by excessively high or low oil levels, thereby simplifying the maintenance process.

[0053] like Figure 4 As shown, in this embodiment, the first connecting member 620 includes a first rubber joint 621 and a first bolt. The first rubber joint 621 and the first bolt cooperate to mount one end of the boom 610 on the vehicle body. The second connecting member 630 includes a second rubber joint 631 and a second bolt 632. The second rubber joint 631 and the second bolt 632 cooperate to mount the other end of the boom 610 on the housing 400. The first rubber joint 621 and the second rubber joint 631 cooperate with the first and second bolts 632, respectively, to provide a stable connection, ensuring a stable and reliable connection between the ends of the boom 610 and the vehicle body and the housing 400. This design can withstand heavy loads and reduce safety risks caused by loose or broken connections. Furthermore, the first and second rubber joints 621 and 631 have a certain degree of elasticity and cushioning properties, which can absorb and disperse vibration and impact forces generated by the boom 610 during operation, protecting the boom 610 from damage.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A gearbox device for a track maintenance vehicle, characterized in that: include: An input shaft assembly (100), an intermediate shaft assembly (200), an output shaft assembly and a housing (400), wherein the housing (400) comprises a first housing (410) and a second housing (420), wherein the first housing (410) and the second housing (420) are interlocked to form a cavity; one end of the input shaft assembly (100) is installed in the cavity, and the other end extends out of the cavity and is connected to a traction motor (500); the intermediate shaft assembly (200) and the output shaft assembly are installed in the cavity; The input shaft assembly (100) includes an input gear shaft (110), and the input gear shaft (110) is supported in the cavity by a four-point angular contact ball bearing (120) and two cylindrical roller bearings (130); the intermediate shaft assembly (200) includes an intermediate gear shaft (210) and an intermediate driven wheel (220), and the intermediate driven wheel (220) is meshed with the intermediate gear shaft (210), and the intermediate driven wheel (220) is meshed with the input gear shaft (110); the output shaft assembly includes an axle (310) and an output gear (320), and the output gear (320) is mounted on the axle (310), and the output gear (320) is meshed with the intermediate gear shaft (210); A suspension assembly (600) includes a suspension arm (610), a first connecting member (620), and a second connecting member (630), wherein the first connecting member (620) and the second connecting member (630) are respectively mounted at two ends of the suspension arm (610), the first connecting member (620) is used for connecting to a vehicle body, and the second connecting member (630) is used for connecting to the housing (400).

2. A gearbox device for a track maintenance vehicle according to claim 1, characterized in that: The two ends of the intermediate gear shaft (210) are respectively provided with first face-to-face tapered roller bearings (230), and the two first face-to-face tapered roller bearings (230) cooperate with each other to support the intermediate gear shaft (210) in the cavity; the two ends of the output gear (320) are respectively provided with second face-to-face tapered roller bearings (330), and the two second face-to-face tapered roller bearings (330) cooperate with each other to support the output gear (320) in the cavity.

3. A track maintenance vehicle gearbox device according to claim 2, characterized in that: The intermediate shaft assembly (200) further includes a first bearing seat (240), on which the first face-to-face tapered roller bearing (230) is mounted; and the output shaft assembly further includes a second bearing seat (340), on which the second face-to-face tapered roller bearing (330) is mounted.

4. A track maintenance vehicle gearbox device according to claim 3, characterized in that: The input shaft assembly (100) further comprises a third bearing seat (140) and a fourth bearing seat (150), wherein the four-point angular contact ball bearing (120) and one cylindrical roller bearing (130) are mounted on the third bearing seat (140); and the other cylindrical roller bearing (130) is mounted on the fourth bearing seat (150).

5. The track maintenance vehicle gearbox device according to claim 4, characterized in that: An oil collecting groove (411) is formed on the inner side wall of the first shell (410), and the oil collecting groove (411) is used to store lubricating oil; an oil channel (412) is formed on the inner side wall of the first shell (410) and the second shell (420), and the oil inlet end of the oil channel (412) is connected to the oil collecting groove (411), and the oil channel (412) is configured to be able to transport the lubricating oil in the oil collecting groove (411) to the first bearing seat (240), the second bearing seat (340), the third bearing seat (140) and the fourth bearing seat (150).

6. The gearbox device for a track maintenance vehicle according to claim 5, characterized in that: The first housing (410) is formed with an observation window (413) corresponding to the oil collecting tank (411), and the observation window (413) is used for a worker to observe the storage amount of lubricating oil in the oil collecting tank (411).

7. The gearbox device for a track maintenance vehicle according to claim 6, characterized in that: The observation window (413) is covered with a window cover (414), and the window cover (414) is used to seal the observation window (413).

8. The gearbox device for a track maintenance vehicle according to claim 1, characterized in that: The second shell (420) is provided with a refueling hole (421) and an oil drain hole (422), wherein the refueling hole (421) and the oil drain hole (422) are connected to the cavity and the outside of the cavity respectively; the refueling hole (421) is used for a worker to inject lubricating oil into the cavity, and the oil drain hole (422) is used for a worker to drain the lubricating oil in the cavity.

9. The track maintenance vehicle gearbox device according to claim 7, characterized in that: An oil level observation hole (423) is also formed on the second shell (420), and the oil level observation hole (423) is used for staff to observe the oil level in the cavity.

10. The track maintenance vehicle gearbox device according to claim 1, characterized in that: The first connecting member (620) includes a first rubber node (621) and a first bolt, and the first rubber node (621) and the first bolt cooperate with each other to mount one end of the suspension arm (610) on the vehicle body; the second connecting member (630) includes a second rubber node (631) and a second bolt (632), and the second rubber node (631) and the second bolt (632) cooperate with each other to mount the other end of the suspension arm (610) on the housing (400).

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