Gear box and bogie having the same

Abstract

The present invention provides a gearbox and a bogie having the same, wherein the gearbox comprises: a box body, comprising a first box cover and a second box cover; a planetary gear assembly, wherein the first box cover, the planetary gear assembly and the second box cover are sequentially connected; a first guide limiter, wherein the first guide limiter is arranged between the first box cover and the planetary gear assembly, and / or the first guide limiter is arranged between the second box cover and the planetary gear assembly, and the first guide limiter is used to assemble the box body and the planetary gear assembly. The technical solution of the present invention can solve the problems of large space occupation and inconvenient assembly and disassembly of the gearbox in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of monorail trains, and in particular to a gear box and a bogie having the same. Background Art

[0002] With the development of urbanization and the increase in population, problems such as traffic congestion and environmental pollution have become increasingly prominent. The traditional public transportation system can no longer meet the transportation needs of modern cities. Monorail trains are a type of urban rail transit vehicle with the advantages of strong adaptability, less land occupation, and low cost. Therefore, monorail trains have room for further promotion and wide application. The bogie of a monorail train is used to support the car body and transmit power to ensure that the train can run along the direction of the track line. The bogie in the prior art includes a motor and a gearbox with a multi-stage gear transmission, but its gearbox occupies a large space and is inconvenient to disassemble and assemble. Summary of the invention

[0003] The invention provides a gear box and a bogie having the same, so as to solve the problems in the prior art that the gear box occupies a large space and is inconvenient to disassemble and assemble.

[0004] In order to solve the above problems, according to one aspect of the present invention, the present invention provides a gear box, including: a box body, including a first box cover and a second box cover; a planetary gear assembly, the first box cover, the planetary gear assembly and the second box cover are connected in sequence; a first guide limit portion, a first guide limit portion is provided between the first box cover and the planetary gear assembly, and / or a first guide limit portion is provided between the second box cover and the planetary gear assembly, and the first guide limit portion is used to assemble the box body and the planetary gear assembly.

[0005] Furthermore, a first step surface is provided on the connecting surface of the first box cover connected to the planetary gear assembly, and the first step surface is adapted to the outer surface of the planetary gear assembly, and / or a second step surface is provided on the connecting surface of the second box cover connected to the planetary gear assembly, and the second step surface is adapted to the outer surface of the planetary gear assembly, and the first step surface and / or the second step surface form a first guide limit portion.

[0006] Furthermore, the planetary gear assembly includes: an inner ring gear, a first case cover, the inner ring gear and the second case cover are connected in sequence, the inner ring gear is assembled on the first case cover and the second case cover through a first guide limit portion; a sun gear is located in the inner ring gear; a planet carrier is rotatably arranged in the inner ring gear; and planetary wheels are rotatably arranged on the planet carrier, and the planetary wheels are respectively meshed with the inner ring gear and the sun gear.

[0007] Furthermore, the planetary gear assembly also includes: an input shaft connected to the sun gear; and an output shaft connected to the planet carrier.

[0008] According to another aspect of the present invention, a bogie is provided, comprising a gearbox and a motor, wherein an input end of a planetary gear assembly of the gearbox is connected to a motor shaft of the motor, wherein the gearbox is the gearbox provided above.

[0009] Furthermore, the input end of the planetary gear assembly is arranged close to the first box cover, the output end of the planetary gear assembly is arranged close to the second box cover, and the housing of the motor is connected to the first box cover.

[0010] Furthermore, a second guide limiting portion is provided between the housing of the motor and the first box cover.

[0011] Furthermore, the motor shaft has a shaft hole, which is a tapered hole, and the input shaft of the gear box is cooperatively connected with the shaft hole.

[0012] Furthermore, an oil filling hole is provided on the input shaft of the gear box and / or the motor shaft.

[0013] Furthermore, the bogie also includes wheels, and the output end of the planetary wheel assembly of the gear box is connected to the wheels.

[0014] By applying the technical solution of the present invention, a planetary gear assembly is arranged in the gear box to transmit power, so that the gear box can achieve a large transmission ratio and reduce the volume. The box body and the planetary gear assembly are assembled through the first guide limiter, which can achieve rapid guiding and positioning, thereby facilitating the disassembly and assembly of the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 The schematic diagram of the structure of the gear box provided by the present invention is shown;

[0017] Figure 2 Another structural schematic diagram of the gear box provided by the present invention is shown;

[0018] Figure 3 Shows Figure 2 Left side view of the gearbox in FIG.

[0019] Figure 4 The schematic diagram of the structure of the bogie provided by the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. casing; 11. first casing cover; 12. second casing cover; 20. planetary gear assembly; 21. inner ring gear; 22. sun gear; 23. planetary carrier; 24. planetary gear; 25. input shaft; 26. output shaft; 100. motor; 101. motor shaft; 102. casing. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0026] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0027] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0028] like Figures 1 to 3 As shown, an embodiment of the present invention provides a gearbox, which includes a case body 10, a planetary gear assembly 20 and a first guide limiter. The case body 10 includes a first case cover 11 and a second case cover 12. In this embodiment, the first case cover 11, the planetary gear assembly 20 and the second case cover 12 are connected in sequence. The first guide limiter can be arranged between the first case cover 11 and the planetary gear assembly 20, or between the second case cover 12 and the planetary gear assembly 20. The first guide limiter can also be arranged between the first case cover 11 and the planetary gear assembly 20, or between the second case cover 12 and the planetary gear assembly 20, and the case body 10 and the planetary gear assembly 20 are assembled by the first guide limiter.

[0029] The gearbox provided in this embodiment is applied, and by arranging a planetary gear assembly 20 in the gearbox to transmit power, the gearbox can achieve a large transmission ratio and reduce its volume. By assembling the housing 10 and the planetary gear assembly 20 together with the first guide limiter, rapid guidance and positioning can be achieved, thereby facilitating the disassembly and assembly of the gearbox. The gearbox provided in this embodiment is applied in the field of monorail trains. Since the structure of the gearbox is compact, the installation space occupied by the entire device is small, and the weight of the device can be reduced. Since the first guide limiter is provided in the gearbox, rapid guidance and positioning can be achieved when the first box cover 11, the planetary gear assembly 20 and the second box cover 12 are assembled together. This arrangement makes it easy for the staff to disassemble and assemble the gearbox, thereby improving work efficiency.

[0030] The first guide limiter can be set as a separate component, or can be set on the housing 10 or the planetary gear assembly 20. For example, mutually matching conical surfaces or steps can be set on the housing 10 and the planetary gear assembly 20. Specifically, in the present embodiment, the first guide limiter can include a first step surface, which is set on the connection surface of the first housing cover 11 connected to the planetary gear assembly 20, and the first step surface is adapted to the outer surface of the planetary gear assembly 20. The first guide limiter can also include a second step surface, which is set on the connection surface of the second housing cover 12 connected to the planetary gear assembly 20, and the second step surface is adapted to the outer surface of the planetary gear assembly 20. In the present embodiment, the first step surface and the second step surface jointly form the first guide limiter. By setting the first guide limiter as the first step surface and the second step surface, the guidance and positioning of the gearbox during disassembly and assembly can be achieved with a simple structure. In this way, while achieving the effect of convenient disassembly and assembly of the gearbox, the manufacturing cost of the equipment is reduced.

[0031] Specifically, the planetary gear assembly 20 includes an inner gear ring 21, a sun gear 22, a planet carrier 23 and a planetary gear 24. The first case cover 11, the inner gear ring 21 and the second case cover 12 are connected in sequence, and the inner gear ring 21 is assembled on the first case cover 11 and the second case cover 12 through a first guide limiter. In order to increase the connection strength of the gearbox and facilitate disassembly and assembly, a first step surface is provided on the first case cover 11 and a second step surface is provided on the second case cover 12, and corresponding step surfaces are provided on both sides of the inner gear ring 21 to match the first step surface and the second step surface. The sun gear 22 is located in the inner gear ring 21. The planetary carrier 23 is rotatably arranged in the inner gear ring 21. The planetary gear 24 is rotatably arranged on the planetary carrier 23, and the planetary gear 24 is respectively meshed with the inner gear ring 21 and the sun gear 22. The sun gear 22 meshes with the planetary gear 24 to drive the planetary gear to rotate, and the planetary carrier 23 is driven to rotate by the meshing of the planetary gear 24 and the inner gear ring 21.

[0032] In order to balance the forces on the sun gear 22 and the inner gear ring 21, a plurality of planetary gears 24 may be arranged at intervals along the circumferential direction of the inner gear ring 21. Moreover, in this embodiment, a pin is also arranged on the planetary carrier 23, and the planetary gear 24 is rotatably arranged on the planetary carrier 23 through the pin. A bearing is also arranged on the pin, and the planetary gear 24 is arranged on the bearing, so that the friction force on the planetary gear 24 during rotation is reduced through the bearing.

[0033] In order to make the transmission of the gearbox more stable and improve the bearing capacity of the gearbox, in this embodiment, the teeth on the inner ring 21, the sun gear 22 and the planetary gear 24 are all set as helical teeth. In order to balance the axial force on the planetary gear 24 when the helical teeth are used, a bearing capable of bearing the axial force is used between the pin shaft and the planetary gear 24, such as a double-row cylindrical roller bearing.

[0034] Furthermore, the planetary gear assembly 20 also includes an input shaft 25 and an output shaft 26. Moreover, the input shaft 25 and the output shaft 26 are on the same axis. Among them, the input shaft 25 is connected to the sun gear 22. The input shaft 25 and the sun gear 22 can be processed separately and then connected, or the input shaft 25 and the sun gear 22 can be processed into an integral structure. In order to make the structure of the gearbox more compact and increase the strength of the structure, in this embodiment, the input shaft 25 and the sun gear 22 are set as an integral gear shaft. The output shaft 26 is connected to the planetary carrier 23. Similarly, the output shaft 26 and the planetary carrier 23 can be set as a split structure or an integral structure. In this embodiment, the output shaft 26 and the planetary carrier 23 are set as an integral structure to make the structure of the gearbox more compact and to improve the structural strength of the device. A bearing can also be set between the output shaft 26 and the housing 10 to reduce the friction force during rotation.

[0035] Furthermore, a breather is provided at the upper part of the housing 10, through which the pressure in the housing 10 can be balanced, and lubricating oil can be added to the housing 10 from the hole of the breather. A magnetic oil plug is also provided at the bottom of the housing 10, which can absorb metal impurities in the lubricating oil, thereby preventing the impurities from causing wear to the internal gears, so as to extend the service life of the gearbox. Moreover, the deteriorated lubricating oil in the gearbox can be discharged through the oil drain port connected to the magnetic oil plug. A liquid level window is also provided on the housing 10 to observe the liquid level in the gearbox. Of course, end covers and sealing rings can also be provided between the input shaft 25 and the housing, and between the output shaft 26 and the housing, to prevent external impurities from entering the housing 10 and to prevent the lubricating oil in the housing 10 from leaking.

[0036] like Figure 4As shown, another embodiment of the present invention provides a bogie, which includes a gearbox and a motor 100. Among them, the input end of the planetary wheel assembly 20 of the gearbox is connected to the motor shaft 101 of the motor 100, and the gearbox is the gearbox provided in the above embodiment. Since the planetary wheel assembly 20 in the gearbox is used to transmit power, the structure of the gearbox is compact, so that the installation space occupied by the bogie as a whole is small. Since the first guide limiter is provided in the gearbox, the box body 10 and the planetary wheel assembly 20 can be quickly guided and positioned, thereby facilitating the disassembly and assembly of the gearbox. Applying this bogie to a monorail train can reduce the installation space of the bogie and improve the efficiency of equipment maintenance.

[0037] Specifically, the input end of the planetary gear assembly 20 is disposed close to the first case cover 11, the output end of the planetary gear assembly 20 is disposed close to the second case cover 12, and the housing 102 of the motor 100 is connected to the first case cover 11. By connecting the housing 102 and the first case cover 11 together, the overall structural strength of the device can be increased, and the installation space of the bogie can be further reduced.

[0038] In order to facilitate the disassembly and assembly of the motor 100 and the gearbox, a second guide limiter is provided between the housing 102 of the motor 100 and the first box cover 11. By guiding and limiting the assembly of the housing 102 and the first box cover 11 with the second guide limiter, the disassembly and assembly of the gearbox can be facilitated. Specifically, in the present embodiment, a third step surface is provided on the connection surface of the first box cover 11 connected to the housing 102, and the third step surface is adapted to the outer surface of the housing 102. The second guide limiter is set as the third step surface, which can reduce the manufacturing cost of the equipment while facilitating the disassembly and assembly of the motor 100 and the gearbox. Moreover, the housing 102 of the motor 100, the first box cover 11, the inner gear ring 21 of the planetary gear assembly 20 and the second box cover 12 can be connected in sequence by stud bolts. By using stud bolts, the motor 100 and the gearbox can be disassembled and assembled from both sides of the equipment, thereby facilitating the operation of the staff and improving the work efficiency.

[0039] In order to reduce the axial size of the bogie and further save installation space, an axial hole is provided on the motor shaft 101, and the axial hole is set as a tapered hole. The input shaft 25 of the gearbox is correspondingly set as a tapered shaft, and the input shaft 25 is connected with the axial hole. Among them, the taper value of the tapered hole and the tapered shaft can be set according to installation requirements. Specifically, in this embodiment, the taper value of the tapered hole and the tapered shaft is set to 1:30.

[0040] In order to increase the connection strength between the motor shaft 101 and the input shaft 25 and ensure the reliability of power transmission, the motor shaft 101 and the input shaft 25 are interference fit. In order to facilitate the disassembly and assembly of the motor shaft 101 and the input shaft 25, an oil filling hole is provided on the input shaft 25 of the gearbox and / or the motor 100 shaft. When connecting the motor shaft 101 and the input shaft 25, oil is injected into the conical surface of the motor shaft 101 and the input shaft 25 through the oil filling hole, which can play a lubricating role and facilitate assembly. When separating the motor shaft 101 and the input shaft 25, oil with a certain pressure is injected into the conical surface of the motor shaft 101 and the input shaft 25 through the oil filling hole, and a gap can be generated between the two components through the oil, thereby facilitating the separation of the motor shaft 101 and the input shaft 25. Specifically, in this embodiment, the oil filling hole is provided on an integral component composed of the input shaft 25 and the sun gear 22. And the oil filling hole is a through hole, so as to facilitate the injection of oil from one side of the sun gear 22.

[0041] Furthermore, the bogie also includes a wheel, and the output end of the planetary wheel assembly 20 of the gearbox is connected to the wheel. The gearbox is connected to the wheel to drive the wheel to rotate, so that the bogie can guide the monorail train and provide power. Specifically, the output shaft 26 of the planetary wheel assembly 20 is connected to the connecting shaft on the wheel. An axial hole is provided on the output shaft 26, and a spline is provided on the axial hole. Correspondingly, a spline is also provided on the connecting shaft on the wheel, and the output shaft 26 is connected to the connecting shaft on the wheel through spline matching. Such a configuration can further reduce the axial size of the bogie, reduce the installation space, and facilitate the disassembly and assembly of the gearbox and the wheel.

[0042] Furthermore, the bogie also includes a brake device, which is used to slow down or stop the wheels. The brake device can be set on the wheels or on the motor. Figure 4 As shown, in this embodiment, the brake device is connected to the end of the motor shaft 101 away from the gear box. When the brake device is in operation, the rotation of the motor shaft 101 can be limited to achieve the purpose of limiting the rotation of the wheel.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bogie, comprising a gearbox and a motor (100), wherein an input end of a planetary gear assembly (20) of the gearbox is connected to a motor shaft (101) of the motor (100), characterized in that: The gearbox comprises: a box body (10), a planetary gear assembly (20) and a first guide limiter; the box body (10) comprises a first box cover (11) and a second box cover (12); the first box cover (11), the planetary gear assembly (20) and the second box cover (12) are connected in sequence; the first guide limiter is arranged between the first box cover (11) and the planetary gear assembly (20), and / or the first guide limiter is arranged between the second box cover (12) and the planetary gear assembly (20); the first guide limiter is used for assembling the box body (10) and the planetary gear assembly (20); The input end of the planetary gear assembly (20) is arranged close to the first box cover (11), the output end of the planetary gear assembly (20) is arranged close to the second box cover (12), and the housing (102) of the motor (100) is connected to the first box cover (11); A second guide limiting portion is provided between the housing (102) of the motor (100) and the first box cover (11); The planetary gear assembly (20) comprises: an inner gear ring (21), the first case cover (11), the inner gear ring (21) and the second case cover (12) are connected in sequence, the inner gear ring (21) is assembled on the first case cover (11) and the second case cover (12) via the first guide limiter; a sun gear (22) located inside the inner gear ring (21); and an input shaft (25), the input shaft (25) being connected to the sun gear (22); The input shaft (25) and the sun gear (22) are processed into an integral structure; An oil injection hole is provided on the input shaft (25) of the gear box and / or the motor shaft (101), and the oil injection hole is used to inject oil into the conical surfaces of the motor shaft (101) and the input shaft (25) that fit together, and the oil generates pressure on the conical surfaces of the motor shaft (101) and the input shaft (25) that fit together, so that a gap is generated between the motor shaft (101) and the input shaft (25), so as to facilitate the separation of the motor shaft (101) and the input shaft (25).

2. The bogie according to claim 1, characterized in that: A first step surface is provided on a connection surface of the first box cover (11) connected to the planetary gear assembly (20), the first step surface being compatible with an outer surface of the planetary gear assembly (20), and / or a second step surface is provided on a connection surface of the second box cover (12) connected to the planetary gear assembly (20), the second step surface being compatible with an outer surface of the planetary gear assembly (20), the first step surface and / or the second step surface forming the first guide limit portion.

3. The bogie according to claim 2, characterized in that: The planetary gear assembly (20) comprises: A planet carrier (23) rotatably disposed in the inner gear ring (21); A planetary gear (24) is rotatably disposed on the planet carrier (23), and the planetary gear (24) is respectively meshed with the inner gear ring (21) and the sun gear (22).

4. The bogie according to claim 3, characterized in that: The planetary gear assembly (20) further comprises: An output shaft (26) connected to the planet carrier (23).

5. The bogie according to claim 4, characterized in that: The motor shaft (101) has an axial hole, the axial hole is a tapered hole, and the input shaft (25) of the gear box is matched and connected to the axial hole.

6. The bogie according to claim 1, characterized in that: The bogie also includes a wheel, and the output end of the planetary wheel assembly (20) of the gear box is connected to the wheel.

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