Bearing type gearbox, bogie and railway vehicle

Abstract

The invention relates to the technical field of railway vehicles, and provides a bearable gear box, a bogie and a railway vehicle, the bearable gear box comprises a box body, a first gear and a second gear which are meshed with each other are arranged in the box body, the box body is provided with a transmission interface, and the first gear is suitable for being connected with a driving unit through the transmission interface; mounting connectors are formed in the two opposite sides of the box body correspondingly, the two mounting connectors are connected with a first shaft sleeve and a second shaft sleeve correspondingly, and the first shaft sleeve and the second shaft sleeve are arranged in the width direction of the railway vehicle. A transmission shaft penetrates through a center hole of the second gear and extends into the first shaft sleeve and the second shaft sleeve, the two ends of the transmission shaft penetrate out of the first shaft sleeve and the second shaft sleeve respectively, and the transmission shaft is suitable for being connected with wheels on the two sides so as to drive the wheels on the two sides to act. The box body is matched with the first shaft sleeve and the second shaft sleeve to jointly achieve the effects of bearing the bending moment of the wheel pair and achieving the rotating function.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a load-bearing gear box, a bogie and a rail vehicle. Background Art

[0002] The main function of the rail transit drive system is to transmit traction power. The gearbox in the drive system mainly bears its own weight and impact loads, and cannot withstand bending moments. It is impossible for the axle to withstand bending moments and realize rotation functions at the same time, which makes the layout of the gearbox very limited. Summary of the invention

[0003] The present invention provides a load-bearing gear box, which is used to solve the technical problem that the gear box in the prior art cannot withstand bending moment, and realizes the separation of the load-bearing and rotation functions of the axle.

[0004] The invention also provides a bogie.

[0005] The invention also provides a rail vehicle.

[0006] The present invention provides a load-bearing gear box, comprising:

[0007] A box body, wherein a first gear and a second gear meshing with each other are provided inside the box body, the box body is configured with a transmission interface, the first gear is suitable for connecting to a driving unit through the transmission interface, mounting interfaces are formed on opposite sides of the box body, and the two mounting interfaces are respectively connected to a first shaft sleeve and a second shaft sleeve, and the first shaft sleeve and the second shaft sleeve are respectively arranged along the width direction of the rail vehicle;

[0008] Among them, a transmission shaft is passed through the center hole of the second gear, and the transmission shaft extends into the first sleeve and the second sleeve respectively. The two ends of the transmission shaft pass through the first sleeve and the second sleeve respectively, and are suitable for connecting with the wheels on both sides to drive the wheels on both sides to move.

[0009] According to a load-bearing gearbox provided by the present invention, the diameter of the second gear is larger than the diameter of the first gear, and the box body is configured with an inspection port on a side close to the second gear, and the inspection port is suitable for installing a box cover through fasteners.

[0010] According to the load-bearing gear box provided by the present invention, the length of the box cover is matched with the diameter of the second gear.

[0011] According to a load-bearing gear box provided by the present invention, the upper surface and the lower surface of the box body are respectively constructed with reinforcing ribs, and the reinforcing ribs are adapted to the position of the second gear.

[0012] According to a load-bearing gear box provided by the present invention, the first sleeve is formed with a first gradually expanding section at one end close to the box body, and the opening of the first gradually expanding section gradually increases along the direction from the first sleeve to the box body, and the larger end of the first gradually expanding section is suitable for being installed on the mounting interface by fasteners.

[0013] According to a load-bearing gear box provided by the present invention, the second sleeve is formed with a second gradually expanding section at one end close to the box body, and the opening of the second gradually expanding section gradually increases along the direction from the second sleeve to the box body, and the larger end of the second gradually expanding section is suitable for being installed on the mounting interface by fasteners.

[0014] According to a load-bearing gearbox provided by the present invention, the mounting interface is suitable for installing a bearing cover, the bearing cover is suitable for installing a bearing, the bearing is sleeved on the transmission shaft, wherein the bearing cover is also equipped with an oil retaining ring and a sealing cover for sealing the bearing cover.

[0015] According to a load-bearing gear box provided by the present invention, the first sleeve and the second sleeve are respectively constructed with a connecting seat, and the connecting seat is connected to a fin plate by a fastener, and the fin plate is suitable for connecting to a frame. Along the direction from the connecting seat to the frame, the width of the fin plate gradually decreases, and the thickness of the fin plate gradually increases.

[0016] The present invention also provides a bogie, comprising a frame, on which the load-bearing gearbox as described above is installed.

[0017] The present invention also provides a rail vehicle, comprising a vehicle body, wherein the vehicle body is equipped with the bogie as described above.

[0018] The load-bearing gear box provided in an embodiment of the present invention is configured with a first gear and a second gear that mesh with each other in a box body, and the first gear is connected to the first gear at a transmission interface through a driving unit to drive the first gear and the second gear to rotate. Based on the rotation of the second gear, the transmission shaft can be driven to rotate to drive the wheels on both sides to move, and the first sleeve and the second sleeve can protect the transmission shaft and carry the load, so that the box body cooperates with the first sleeve and the second sleeve to bear the bending moment and realize the rotation function.

[0019] The bogie provided by the embodiment of the present invention is achieved by installing the aforementioned load-bearing gear box on the frame, arranging a first gear and a second gear that mesh with each other in the box body, and connecting the first gear at the transmission interface through a driving unit to drive the first gear and the second gear to rotate. Based on the rotation of the second gear, the transmission shaft can be driven to rotate to drive the wheels on both sides to move, and the first bushing and the second bushing can protect the transmission shaft and bear the load, so that the box body cooperates with the first bushing and the second bushing to bear the bending moment and realize the rotation function.

[0020] The rail vehicle provided by the embodiment of the present invention is achieved by installing the aforementioned bogie on the vehicle body, arranging a first gear and a second gear that mesh with each other in a box body, and connecting the first gear at a transmission interface through a driving unit to drive the first gear and the second gear to rotate. Based on the rotation of the second gear, the transmission shaft can be driven to rotate to drive the wheels on both sides to move, and the first bushing and the second bushing can protect the transmission shaft and bear the load, so that the box body cooperates with the first bushing and the second bushing to bear the bending moment and realize the rotation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is one of the structural schematic diagrams of the load-bearing gear box provided by the present invention;

[0023] Figure 2 This is the second structural schematic diagram of the load-bearing gear box provided by the present invention;

[0024] Figure 3 It is one of the cross-sectional views of the load-bearing gearbox provided by the present invention;

[0025] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0026] Figure 5 This is the second cross-sectional view of the load-bearing gear box provided by the present invention.

[0027] Reference numerals:

[0028] 10. Box body; 110. First gear; 120. Second gear; 130. Transmission interface; 140. Mounting interface; 150. Inspection port; 160. Box cover; 170. Reinforcement rib; 200. First bushing; 210. First expansion section; 300. Second bushing; 310. Second expansion section; 400. Transmission shaft; 500. Bearing cover; 510. Bearing; 520. Oil retaining ring; 530. Sealing cover; 600. Connecting seat; 700. Fin plate. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] Combine the following Figure 1-Figure 5The embodiment of the present invention is described. This embodiment provides a load-bearing gearbox, including a housing 10, wherein a first gear 110 and a second gear 120 meshing with each other are provided inside the housing 10, and the housing 10 is configured with a transmission interface 130, wherein the first gear 110 is suitable for connecting to a drive unit through the transmission interface 130, and mounting interfaces 140 are respectively formed on opposite sides of the housing 10, wherein the two mounting interfaces 140 are respectively connected to a first sleeve 200 and a second sleeve 300, and the first sleeve 200 and the second sleeve 300 are respectively arranged along the width direction of the rail vehicle. Among them, a transmission shaft 400 is passed through the center hole of the second gear 120, and the transmission shaft 400 extends into the first sleeve 200 and the second sleeve 300 respectively, and the two ends of the transmission shaft 400 respectively pass through the first sleeve 200 and the second sleeve 300, and are suitable for connecting to the wheels on both sides to drive the wheels on both sides to move.

[0035] In this embodiment, a first gear 110 and a second gear 120 that mesh with each other are arranged in the housing 10, and the first gear 110 is connected to the transmission interface 130 through a driving unit to drive the first gear 110 and the second gear 120 to rotate. Based on the rotation of the second gear 120, the transmission shaft 400 can be driven to rotate to drive the wheels on both sides to move, and the first sleeve 200 and the second sleeve 300 can protect the transmission shaft 400 and carry the load, so that the housing 10 cooperates with the first sleeve 200 and the second sleeve 300 to bear the bending moment of the wheelset and realize the rotation function.

[0036] Among them, both ends of the transmission shaft 400 are suitable for interference connection with transition pieces, and a flexible plate is connected through the transition piece and fasteners. The wheels are elastic wheels, and the elastic wheels are connected to the flexible plate through fasteners to realize transmission between the transmission shaft 400 and the wheels.

[0037] like Figure 5 As shown, a center hole is constructed in the middle of the second gear 120, and the transmission shaft 400 is inserted into the center hole and fixed to the second gear 120, wherein the transmission shaft 400 and the center hole can be fixed to each other by welding, or fixed to each other by the direction of fasteners, or fixed to each other by splines, riveting, etc., to ensure that no axial movement and radial movement occur between the transmission shaft 400 and the second gear 120.

[0038] like Figure 1 As shown, the first sleeve 200 and the second sleeve 300 can be respectively set as a square hollow structure, and the first sleeve 200 and the second sleeve 300 cooperate with the box body 10 to bear the bending moment, so that the "axle" formed by the first sleeve 200, the second sleeve 300 and the transmission shaft 400 has the bearing and rotation functions.

[0039] Please continue to refer to Figure 1 and Figure 2 The length of the first sleeve 200 is greater than the length of the second sleeve 300, that is, the box body 10 is not arranged in the center during the arrangement process, which can facilitate the arrangement and installation of other components, for example, it is convenient to connect the drive unit to the first sleeve 200, the second sleeve 300 or the box body 10.

[0040] According to the load-bearing gearbox provided by the present invention, Figure 5 As shown, the diameter of the second gear 120 is greater than the diameter of the first gear 110, and the housing 10 is configured with an inspection port 150 on one side close to the second gear 120, and a housing cover 160 is installed at the inspection port 150 through fasteners. The diameters of the second gear 120 and the first gear 110 are different so that they have a certain transmission ratio, which is convenient for the conversion of the rotation speed. The inspection port 150 is formed to facilitate the inspection of the first gear 110 and the second gear 120 inside the housing 10. Based on the fact that the diameter of the second gear 120 is greater than the diameter of the first gear 110, the inspection port 150 is opened on one side of the second gear 120 so that all parts inside the housing 10 can be observed and inspected at the inspection port 150.

[0041] like Figure 2 As shown, the inspection opening 150 is roughly located on the front side of the box body 10, and the inspection opening 150 forms a dividing surface of the box body 10. The position of the dividing surface can ensure that the box body 10 has a strong load-bearing capacity, and can improve the vertical load-bearing, reduce stress concentration, and avoid overloading and deformation of the box body 10 during the load-bearing process.

[0042] Among them, the length of the box cover 160 is adapted to the diameter of the second gear 120, the inspection port 150 is arranged in the vertical direction, and the box cover 160 is also extended in the vertical direction. The box cover 160 covers the outer diameter of the second gear 120, which is convenient for repairing the first gear 110 and the second gear 120.

[0043] In this embodiment, the upper and lower surfaces of the housing 10 are respectively provided with reinforcing ribs 170, and the reinforcing ribs 170 are adapted to the position of the second gear 120. The housing 10 is structurally reinforced by the reinforcing ribs 170, and the reinforcing ribs 170, the housing 10 cooperate with the first sleeve 200 and the second sleeve 300 to bear the bending moment of the wheelset. Figure 2 As shown, the reinforcing ribs 170 are located on the upper surface and the lower surface of the box body 10 at the position of the second gear 120. The reinforcing ribs 170 are arranged in the vertical direction and can reinforce the load-bearing in the vertical direction.

[0044] like Figure 1 and Figure 2As shown, the first sleeve 200 is formed with a first gradually expanding section 210 at one end close to the housing 10, and the opening of the first gradually expanding section 210 gradually increases along the direction from the first sleeve 200 to the housing 10, and the larger end of the first gradually expanding section 210 is suitable for being installed on the mounting interface 140 through fasteners. The first gradually expanding section 210 is generally trumpet-shaped, and the trumpet-shaped first gradually expanding section 210 can ensure that the contact surface between the first sleeve 200 and the housing 10 is large enough, reduce stress concentration, ensure the structural strength of the first sleeve 200, and ensure the stability of the connection between the first sleeve 200 and the housing 10.

[0045] Please continue to refer to Figure 1 and Figure 2 The second sleeve 300 is formed with a second gradually expanding section 310 at one end close to the housing 10. The opening of the second gradually expanding section 310 gradually increases along the direction from the second sleeve 300 to the housing 10, and the larger end of the second gradually expanding section 310 is suitable for being mounted on the mounting interface 140 through fasteners. The second gradually expanding section 310 is generally trumpet-shaped, and the trumpet-shaped second gradually expanding section 310 can ensure that the contact surface between the second sleeve 300 and the housing 10 is large enough, reduce stress concentration, ensure the structural strength of the second sleeve 300, and ensure the stability of the connection between the second sleeve 300 and the housing 10.

[0046] like Figure 3 and Figure 4 As shown, the mounting interface 140 is suitable for installing a bearing cover 500, and the bearing cover 500 is suitable for installing a bearing 510, and the bearing 510 is sleeved on the transmission shaft 400, wherein the bearing cover 500 is also equipped with an oil retaining ring 520 and a sealing cover 530 for sealing the bearing cover 500.

[0047] The bearing 510 is sleeved on the transmission shaft 400 to ensure smooth rotation of the transmission shaft 400 and to prevent the housing 10 from interfering with the rotation of the transmission shaft 400. The bearing cover 500, the oil retaining ring 520 and the sealing cover 530 can form a labyrinth sealing structure, which can be oriented as a separate ventilation device for the housing 10.

[0048] like Figure 1 and Figure 2 As shown, the first sleeve 200 and the second sleeve 300 are respectively constructed with a connecting seat 600, and the connecting seat 600 is connected to a fin plate 700 through fasteners. The fin plate 700 is suitable for connecting to the frame. Along the direction from the connecting seat 600 to the frame, the width of the fin plate 700 gradually decreases, and the thickness of the fin plate 700 gradually increases.

[0049] The fin plate 700 can replace the original first-order tie rod for positioning. One end of the fin plate 700 is provided with three positioning screw holes for connecting with the connecting seat 600 of the first sleeve 200 or the second sleeve 300. The other end of the fin plate 700 is provided with two screw holes for connecting the rubber node to connect with the frame. The structure of the fin plate 700 can achieve the balance of large torque. The fin plate 700 close to one side of the frame can be connected to the frame by two bolts. While achieving positioning, it can also bear the input of lateral force, and finally achieve the purpose of low vertical stiffness and high lateral stiffness in one piece.

[0050] In this embodiment, the driving unit includes a motor, which can be fixed on the outer surface of the housing 10. The output shaft of the motor extends into the housing 10 through the transmission interface 130 and is connected to the first gear 110. A braking mechanism is provided on the side of the motor away from the output shaft. The braking mechanism includes a housing, a rotating member, a moving disc, a static disc and a driving member. The inner surface of the housing is provided with guide ribs along the direction of the motor output shaft. The rotating member is rotatably arranged in the housing, and the rotating member is connected to the output shaft of the motor. The outer surface of the rotating member is provided with limiting ribs along the direction of the motor output shaft. The moving disc and the static disc are arranged in the housing, and the moving disc and the static disc are sleeved on the rotating member at intervals. The inner circumference of the moving disc is provided with a limiting slot, which is clamped to the limiting rib, and the outer circumference of the static disc is provided with a positioning groove, which is clamped to the guide rib. The driving member is arranged in the housing, and the driving member is suitable for connecting with the static disc. The driving member is suitable for driving the static disc to slide along the guide rib so that the static disc and the moving disc fit each other to form a brake.

[0051] During the driving process, the output shaft of the motor drives the first gear 110 to rotate, thereby driving the second gear 120 to rotate. During the rotation of the second gear 120, the transmission shaft 400 will be driven to rotate, so that the wheel rotates. In addition, during the driving process, the static plate will remain stationary under the limiting action of the positioning groove and the guide rib, and the dynamic plate will rotate with the output shaft of the motor under the limiting action of the limiting slot and the limiting rib, which will not affect the driving process.

[0052] During the braking process, the driving member will push the moving disc and the static disc closer to each other, and the static disc will slide axially under the limiting action of the positioning groove and the guide rib, and the moving disc will slide axially under the limiting action of the limiting slot and the limiting rib, and the axial sliding of the moving disc and the static disc will make the moving disc and the static disc close to each other, thereby forming a braking force on the moving disc to drive the moving disc to stop rotating. When the moving disc gradually stops rotating, the moving disc can drive the output shaft of the motor to stop rotating, and the wheel is braked through the transmission action of the first gear 110, the second gear 120 and the transmission shaft 400.

[0053] One side of the shell is fixed to the motor by fasteners, and the other side of the shell is provided with a shell cover, on which at least two brake grooves distributed along the circumferential direction are formed. The driving member is suitable for being installed in the brake grooves, and each two adjacent brake grooves are connected to each other. One of the brake grooves is provided with an oil hole for oil pressure to drive the driving member to operate.

[0054] The driving member is specifically a hydraulic driving mechanism, which is installed in the brake groove, and an oil hole is opened in one of the brake grooves to connect the oil pressure pipeline to control the action of the driving member. Multiple brake grooves will be installed with multiple brake members, which can ensure balance and stability during braking on the one hand, and multi-point drive can ensure successful braking on the other hand.

[0055] Since the motor is installed on the housing 10, the first sleeve 200 and the second sleeve 300, the motor and the housing 10 can share a single hanging point without the need for additional hanging. Figure 1 As shown, a connection node is configured on the first sleeve 200 , and the motor can be mounted on the connection node by fasteners.

[0056] On the other hand, the present invention further provides a bogie, comprising a frame, on which a load-bearing gearbox as in the aforementioned embodiment is installed.

[0057] In this embodiment, the aforementioned load-bearing gearbox is installed on the frame, and a first gear 110 and a second gear 120 that mesh with each other are arranged in the box body 10. The first gear 110 is connected at the transmission interface 130 by a driving unit to drive the first gear 110 and the second gear 120 to rotate. Based on the rotation of the second gear 120, the transmission shaft 400 can be driven to rotate to drive the wheels on both sides to move, and the first shaft sleeve 200 and the second shaft sleeve 300 can protect the transmission shaft 400 and carry the load, so that the box body 10 cooperates with the first shaft sleeve 200 and the second shaft sleeve 300 to bear the bending moment and realize the rotation function.

[0058] In yet another aspect, the present invention further provides a rail vehicle, comprising a vehicle body, wherein the vehicle body is equipped with a bogie as in the aforementioned embodiment.

[0059] In this embodiment, the aforementioned bogie is installed on the vehicle body, and a first gear 110 and a second gear 120 that mesh with each other are arranged in the box body 10. The first gear 110 is connected at the transmission interface 130 by a driving unit to drive the first gear 110 and the second gear 120 to rotate. Based on the rotation of the second gear 120, the transmission shaft 400 can be driven to rotate to drive the wheels on both sides to move, and the first sleeve 200 and the second sleeve 300 can protect the transmission shaft 400 and carry the load, so that the box body 10 cooperates with the first sleeve 200 and the second sleeve 300 to carry the bending moment and realize the rotation function.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A load-bearing gearbox, characterized in that: include: A box (10) is provided with a first gear (110) and a second gear (120) meshing with each other inside, the box (10) is configured with a transmission interface (130), the first gear (110) is suitable for connecting to a drive unit through the transmission interface (130), mounting interfaces (140) are respectively formed on opposite sides of the box (10), the two mounting interfaces (140) are respectively connected to a first shaft sleeve (200) and a second shaft sleeve (300), and the first shaft sleeve (200) and the second shaft sleeve (300) are respectively arranged along the width direction of the rail vehicle; A transmission shaft (400) is inserted into the center hole of the second gear (120), and the transmission shaft (400) extends into the first shaft sleeve (200) and the second shaft sleeve (300) respectively. Two ends of the transmission shaft (400) pass through the first shaft sleeve (200) and the second shaft sleeve (300) respectively, and are suitable for being connected to the wheels on both sides to drive the wheels on both sides to move.

2. The load-bearing gearbox according to claim 1, characterized in that: The diameter of the second gear (120) is greater than the diameter of the first gear (110), and the housing (10) is provided with an inspection opening (150) on a side close to the second gear (120), wherein a housing cover (160) is installed at the inspection opening (150) via fasteners.

3. The load-bearing gearbox according to claim 2, characterized in that: The length of the box cover (160) is matched to the diameter of the second gear (120).

4. The load-bearing gearbox according to claim 1, characterized in that: The upper surface and the lower surface of the box body (10) are respectively configured with reinforcing ribs (170), and the reinforcing ribs (170) are adapted to the position of the second gear (120).

5. The load-bearing gearbox according to claim 1, characterized in that: The first sleeve (200) is formed with a first gradually expanding section (210) at one end close to the housing (10); along the direction from the first sleeve (200) to the housing (10), the opening of the first gradually expanding section (210) gradually increases, and the larger end of the first gradually expanding section (210) is suitable for being installed on the installation interface (140) by means of fasteners.

6. The loadable gearbox according to claim 5, characterized in that: The second sleeve (300) is formed with a second gradually expanding section (310) at one end close to the housing (10); along the direction from the second sleeve (300) to the housing (10), the opening of the second gradually expanding section (310) gradually increases, and the larger end of the second gradually expanding section (310) is suitable for being installed on the installation interface (140) by means of fasteners.

7. The loadable gearbox according to claim 6, characterized in that: The mounting interface (140) is suitable for mounting a bearing cover (500), the bearing cover (500) is suitable for mounting a bearing (510), the bearing (510) is sleeved on the transmission shaft (400), wherein the bearing cover (500) is also equipped with an oil retaining ring (520) and a sealing cover (530) for sealing the bearing cover (500).

8. The loadable gearbox according to any one of claims 1 to 7, characterized in that: The first sleeve (200) and the second sleeve (300) are respectively configured with a connecting seat (600), and the connecting seat (600) is connected to a fin plate (700) via a fastener. The fin plate (700) is suitable for connecting to a frame. Along the direction from the connecting seat (600) to the frame, the width of the fin plate (700) gradually decreases, and the thickness of the fin plate (700) gradually increases.

9. A bogie, characterized in that: It comprises a frame on which a load-bearing gear box according to any one of claims 1-8 is installed.

10. A rail vehicle, characterized in that: It comprises a car body, on which the bogie according to claim 9 is installed.

Images