Axle gear box

Abstract

This utility model discloses an axle gearbox, relating to the field of gearbox technology. The axle gearbox includes a shaft assembly and a housing assembly. The shaft assembly includes an input shaft, an output shaft, and an intermediate shaft rotatably mounted on the housing assembly, with the input shaft, intermediate shaft, and output shaft meshing sequentially for transmission. The housing assembly includes a lower housing and an upper housing that engages with the top opening of the lower housing, and further includes two sets of first oil grooves, an oil passage, and a second oil groove. Both sets of first oil grooves are located on the top of the side wall of the upper housing, with one set located on the input shaft side and the other on the output shaft side. The oil passage connects the corresponding first oil groove to the chamber containing the input shaft end bearing, and the other corresponding first oil groove to the chamber containing the output shaft end bearing. The second oil groove is located on the end face of the lower housing and connects to the chamber containing the intermediate shaft end bearing. This axle gearbox ensures lubrication of the bearings at the ends of the shaft assembly, which helps save space in the housing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, and more specifically to an axle gear box. Background Art

[0002] The axle gearbox is an important component of the power bogie of large-scale road maintenance machinery. It not only needs to provide driving force for high-speed running and operation running of large-scale road maintenance machinery, but also needs to meet the requirements of train coupling operation. The axle gearboxes on the market are usually purchased from outside. However, the oil channels of the purchased axle gearboxes make the space in the axle gearbox limited, which not only limits the layout of the transmission structure, but also limits the lubrication effect of the transmission structure.

[0003] In summary, how to ensure the lubrication effect of the bearing while saving the internal space of the gear box is a problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an axle gear box, which can ensure the lubrication effect of the end bearing of the rotating shaft assembly and is conducive to saving space in the box assembly.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An axle gearbox, comprising a rotating shaft assembly and a housing assembly, wherein the rotating shaft assembly comprises an input shaft, an output shaft and an intermediate shaft rotatably arranged on the housing assembly, wherein the input shaft, the intermediate shaft and the output shaft are meshed and driven in sequence; the housing assembly comprises a lower housing and an upper housing buckled with an opening at the top of the lower housing, and further comprises:

[0007] Two groups of first oil grooves are both arranged on the top of the side wall of the upper box body, and one group of the first oil grooves is located on one side of the input shaft, and the other group of the first oil grooves is located on one side of the output shaft;

[0008] An oil passage, used for connecting a corresponding first oil groove with a chamber where the input shaft end bearing is located, and another corresponding first oil groove with a chamber where the output shaft end bearing is located;

[0009] The second oil groove is arranged on the end surface of the lower housing, and the second oil groove is connected to the cavity where the end bearing of the intermediate shaft is located.

[0010] Preferably, a skeleton oil seal is sandwiched between the shaft section of the input shaft extending into the box assembly and the box assembly;

[0011] And / or, the skeleton oil seal is sandwiched between the shaft section of the output shaft extending into the box assembly and the box assembly.

[0012] Preferably, it further comprises an end cover, and the end cover is arranged at the end of the output shaft extending into the box assembly and the end of the output shaft extending into the box assembly;

[0013] The end cover includes an inner cover and an outer cover, the inner cover is clamped between the outer cover and the upper box body and the lower box body, the skeleton oil seal is clamped between the rotating shaft assembly and the inner cover, and the outer cover abuts against the skeleton oil seal.

[0014] Preferably, the end cover has a top with a groove, and the oil passage is connected to the chamber where the input shaft end bearing is located and the chamber where the output shaft end bearing is located through the groove.

[0015] Preferably, a ring groove is provided in the middle through hole of the end cover, and the ring groove is located at a side away from the upper box body and the lower box body;

[0016] And / or, a grease injection hole is provided on a side of the end cover away from the box assembly, the grease injection hole is communicated with the annular groove, and an oil nozzle is provided in the grease injection port.

[0017] Preferably, the inner side wall of the upper box body and / or the lower box body is provided with a detachable oil deflector, and the top edge of the oil deflector is higher than the bottom edge of the chamber at the end of the shaft assembly where the bearing is located.

[0018] Preferably, a breather is provided on the top of the upper box body, an oil baffle is provided in the inner cavity of the upper box body, and the oil baffle is located at the bottom of the breather.

[0019] Preferably, a surface of the breather bottom plate close to the box assembly is provided with a protruding structure for plugging and cooperating with a positioning groove on the top of the upper box.

[0020] Preferably, the front end of the box assembly has a hanging seat, and the hanging seat is rotatably connected to a hanging rod, and the other end of the hanging rod is provided with a joint assembly, and the joint assembly is an elastic member;

[0021] And / or, the suspension seat comprises a first side plate and a second side plate which are spaced apart, and the suspension rod is arranged between the first side plate and the second side plate through the joint assembly;

[0022] The end of the first side plate away from the box assembly protrudes from the second side plate, and the end of the first side plate away from the box assembly has a through hole.

[0023] Preferably, the opening ends of the oil filling hole and / or the oil drain hole at the bottom of the lower box body are provided with magnetic screw plugs.

[0024] The utility model provides an axle gearbox, wherein two groups of first oil grooves are arranged above the side wall of the upper box body supporting the rotating shaft assembly, wherein one group of the first oil grooves is located at one side of the output shaft, and the other group of the first oil grooves is located at one side of the input shaft, and the first oil grooves in each group are respectively located at two opposite sides of the box body, and the two groups of the first oil grooves are both located above the rotating shaft assembly, so as to receive the lubricating oil splashed during the operation of the rotating shaft assembly; an oil channel is opened on the box body, and the oil channel can be a linear hole or a curved hole, and an opening of the oil channel is located at the bottom of the first oil groove, so that the lubricating oil in the first oil groove can flow into the oil channel, and the oil channel extends downward, and the opening of the lower end thereof is located on the side wall of the chamber where the bearing to be lubricated is located, so as to communicate the first oil groove with the chamber where the bearing to be lubricated is located; the second oil groove is used to receive the splashed lubricating oil, so as to lubricate the bearing at the end of the intermediate shaft, the second oil groove is located near the bearing at the end of the intermediate shaft, and the openings of the second oil grooves are both located on the side wall of the chamber where the bearing at the end of the intermediate shaft is located, so as to communicate with the chamber where the bearing at the end of the intermediate shaft is located.

[0025] When in use, the lubricating oil splashed by the rotating shaft assembly during operation can fall into the first oil groove, the second oil groove and the lower housing, and the lubricating oil in the first oil groove can lubricate the bearings at the ends of the output shaft and the input shaft through the oil passage, while the lubricating oil in the second oil groove can lubricate the bearings at the ends of the intermediate shaft. The axle gearbox lubricates the bearings at the ends of the intermediate shaft through the second oil groove located in the intermediate shaft attachment. This arrangement not only ensures the lubrication effect of the bearings at the ends of the rotating shaft assembly and improves the heat dissipation capacity, but also helps to save space in the housing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a specific embodiment provided by the utility model;

[0028] Figure 2 It is a partial schematic diagram of a specific embodiment provided by the utility model;

[0029] Figure 3 A transverse cross-sectional view of a specific embodiment provided by the utility model;

[0030] Figure 4 A longitudinal cross-sectional view of a specific embodiment provided by the utility model;

[0031] Figure 5A front view of a specific embodiment provided by the utility model;

[0032] Figure 6 for Figure 5 AA section view.

[0033] Figure 1-Figure 6 , the reference numerals include:

[0034] 1 is a rotating shaft assembly, 1-1 is an input shaft, 1-2 is an output shaft, 1-3 is an intermediate shaft, 2 is a housing assembly, 2-1 is an upper housing, 2-2 is a lower housing, 3 is an end cover, 3-1 is an inner cover, 3-2 is an outer cover, 3-3 is a groove, 3-4 is a ring groove, 4 is a hanger, 4-1 is a through hole, 5 is a hanger rod, 6 is a first oil groove, 7 is an oil channel, 8 is a second oil groove, 9 is a skeleton oil seal, 10 is an oil nozzle, 11 is an oil baffle plate, 12 is a breather, 13 is an oil baffle plate, 14 is a magnetic screw plug, and 15 is an oil mark. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The core of the utility model is to provide an axle gear box, which can ensure the lubrication effect of the end bearing of the rotating shaft assembly and save the space in the box assembly.

[0037] Please refer to Figures 1 to 6 The utility model provides an axle gearbox, including a shaft assembly 1 and a housing assembly 2. The shaft assembly 1 includes an input shaft 1-1, an output shaft 1-2 and an intermediate shaft 1-3 rotatably arranged on the housing assembly. The input shaft 1-1, the intermediate shaft 1-3 and the output shaft 1-2 are meshed and transmitted in sequence. The housing assembly 2 includes a lower housing 2-2 and an upper housing 2-1 buckled with an opening on the top of the lower housing 2-2, and also includes two sets of first oil grooves 6, oil channels 7 and second oil grooves 8.

[0038] Among them, two groups of first oil grooves 6 are both arranged at the top of the side wall of the upper box body 2-1, and one group of first oil grooves 6 is located on the side of the input shaft 1-1, and the other group of first oil grooves 6 is located on the side of the output shaft 1-2; the oil channel 7 is used to connect the corresponding first oil groove 6 with the chamber where the end bearing of the input shaft 1-1 is located, and the other corresponding first oil groove 6 with the chamber where the end bearing of the output shaft 1-2 is located; the second oil groove 8 is arranged on the end face of the lower box body 2-2, and the second oil groove 8 is connected to the chamber where the end bearing of the intermediate shaft 1-3 is located.

[0039] like Figure 1 As shown, a three-stage or more-stage axle gearbox generally includes a rotating shaft assembly 1 for transmitting power, wherein an input shaft 1-1 is used to connect to a motor or other types of driving devices, an output shaft 1-2 is connected to an axle or other driven device, and an intermediate shaft 1-3 cooperates with a transmission structure on the input shaft 1-1 to receive the power of the input shaft 1-1, and cooperates with a transmission structure on the output shaft 1-2 to transmit power to the output shaft 1-2; and a box body assembly 2 is generally used to support and protect the above-mentioned rotating shaft assembly 1.

[0040] like Figure 3 and Figure 2 As shown, two groups of first oil grooves 6 are arranged above the side wall of the upper box body 2-1 supporting the rotating shaft assembly 1, one group of the first oil grooves 6 is located on the side of the output shaft 1-2, and the other group of the first oil grooves 6 is located on the side of the input shaft 1-1. The first oil grooves 6 in each group are respectively located on the opposite sides of the upper box body 2-1, and the two groups of first oil grooves 6 are both located above the rotating shaft assembly 1, so as to receive the lubricating oil splashed during the operation of the rotating shaft assembly 1. It is worth mentioning that the type of the first oil groove 6 is not limited, and it can be a U-shaped groove or a rectangular groove, etc., as long as the above-mentioned function can be achieved.

[0041] like Figure 3 As shown, an oil passage 7 is opened on the lower housing 2-2. The oil passage 7 can be a straight hole or a curved hole. An opening of the oil passage 7 is located at the bottom of the first oil groove 6, so that the lubricating oil in the first oil groove 6 can flow into the oil passage 7. The oil passage 7 extends downward, and the opening at the lower end is located on the side wall of the chamber where the bearing to be lubricated is located, thereby connecting the first oil groove 6 with the chamber where the bearing to be lubricated is located. Preferably, the opening at the lower end of the oil passage 7 is located on the outside of the bearing, that is, close to the side of the outer wall of the lower housing 2-2. Such an arrangement is conducive to fully lubricating the bearing.

[0042] Optionally, the number of oil channels 7 is equal to the number of first oil grooves 6, that is, four. One oil channel 7 connects a first oil groove 6 located on one side of the input shaft 1-1 and a chamber where a bearing at one end of the input shaft 1-1 is located, one oil channel 7 connects another first oil groove 6 located on one side of the input shaft 1-1 and a chamber where a bearing at the other end of the input shaft 1-1 is located, one oil channel 7 connects a first oil groove 6 located on one side of the output shaft 1-2 and a chamber where a bearing at one end of the output shaft 1-2 is located, and one oil channel 7 connects another first oil groove 6 located on one side of the output shaft 1-2 and a chamber where a bearing at the other end of the output shaft 1-2 is located.

[0043] Optionally, the number of oil passages 7 is not equal to the number of first oil grooves 6. Specifically, the number of first oil grooves 6 is four, the number of oil passages 7 is two, and each oil passage 7 has four openings. One oil passage 7 connects the two first oil grooves 6 located on the box wall on the same side of the box assembly 2 and the chamber where the bearings for supporting the input shaft 1-1 and the output shaft 1-2 are located, and the other oil passage 7 connects the two first oil grooves 6 located on the box wall on the other side of the box assembly 2 and the chamber where the bearings for supporting the input shaft 1-1 and the output shaft 1-2 are located.

[0044] The second oil groove 8 is used to receive the splashed lubricating oil, so as to lubricate the bearings at the ends of the intermediate shafts 1-3. Figure 2 As shown, the second oil groove 8 is located near the end bearing of the intermediate shaft 1-3, and the opening of the second oil groove 8 is located on the side wall of the cavity where the end bearing of the intermediate shaft 1-3 is located, so as to be connected with the cavity where the end bearing of the intermediate shaft 1-3 is located. It can be realized by casting or welding a protruding platform at a preset position on the inner wall of the box assembly 2, and opening the second oil groove 8 on the protruding platform. Of course, any other type of structure can also be used as long as the above-mentioned second oil groove 8 can be successfully set, for example, a tubular structure welded and fixed at a preset position on the inner wall of the box assembly 2, and the top of the tubular structure is open, so that the inner cavity of the tubular structure can be used as the second oil groove 8.

[0045] Optional, such as Figure 2 and Figure 3 As shown, the joint surface between the lower case 2-2 and the upper case 2-1 passes through the center of the output shaft 1-2 and the intermediate shaft 1-3, and the upper surface of the above-mentioned protruding platform is coplanar with the upper surface of the lower case 2-2. After assembly, the upper surface of the above-mentioned protruding platform is coplanar with the joint surface between the lower case 2-2 and the upper case 2-1. With this arrangement, the structure of the axle gearbox is simple and reasonable, easy to manufacture, and effectively guarantees the lubrication effect of the bearing.

[0046] When in use, the lubricating oil splashed when the rotating shaft assembly 1 is running can fall into the first oil groove 6, the second oil groove 8 and the lower box body 2-2, and the lubricating oil in the first oil groove 6 can lubricate the bearings at the ends of the output shaft 1-2 and the input shaft 1-1 through the oil channel 7, and the lubricating oil in the second oil groove 8 can lubricate the bearings at the ends of the intermediate shaft 1-3.

[0047] The axle gearbox lubricates the bearings at the ends of the intermediate shaft 1-3 through the second oil groove 8 located in the attachment of the intermediate shaft 1-3. This arrangement not only ensures the lubrication effect of the bearings at the ends of the rotating shaft assembly 1 and improves the heat dissipation capacity, but also helps to save space in the box assembly 2.

[0048] Preferably, the bottom of the first oil groove 6 is inclined, and the opening of the oil channel 7 located on the side wall of the first oil groove 6 is the lowest point of the bottom of the first oil groove 6. Optionally, the inclination angle of the oil accumulation groove compared to the horizontal is in the range of 1°-2°. Such an arrangement is conducive to the lubricating oil in the first oil groove 6 to flow into the oil channel 7.

[0049] Further, in order to improve the heat dissipation effect, heat dissipation ribs are provided on the outer side of the box assembly 2, optionally, as Figure 1 and Figure 5 As shown, the heat dissipation ribs are perpendicular to the joint surface of the lower box body 2-2 and the upper box body 2-1. Such an arrangement is conducive to the film drawing operation during the casting process of the box body assembly 2.

[0050] In some embodiments, a skeleton oil seal 9 is sandwiched between the shaft section of the input shaft 1-1 extending into the box assembly 2 and the box assembly 2; in some embodiments, a skeleton oil seal 9 is sandwiched between the shaft section of the output shaft 1-2 extending into the box assembly 2 and the box assembly 2.

[0051] like Figure 4 and Figure 6 As shown, skeleton oil seals 9 are provided at the ends of the input shaft 1-1 and the output shaft 1-2 to effectively prevent the lubricating oil from flowing out of the housing assembly 2, and facilitate maintenance, thereby effectively reducing maintenance costs. It should be noted that the type and quantity of the skeleton oil seals 9 are not limited, as long as the oil seal effect can be achieved.

[0052] Optionally, a high-speed limit bearing and a skeleton oil seal 9 are selected, thereby greatly improving the maximum speed of the coupled operation of the axle gearbox.

[0053] In some embodiments, an end cover 3 is also included, and the end cover 3 is arranged at the end of the output shaft 1-2 extending into the box assembly 2, and the end of the output shaft 1-2 extending into the box assembly 2; the end cover 3 includes an inner cover 3-1 and an outer cover 3-2, the inner cover 3-1 is clamped between the outer cover 3-2 and the upper box body 2-1 and the lower box body 2-2, the skeleton oil seal 9 is clamped between the rotating shaft assembly 1 and the inner cover 3-1, and the outer cover 3-2 abuts against the skeleton oil seal.

[0054] like Figure 4 and Figure 6 As shown, an end cover 3 is usually arranged on the outside of the box assembly 2 to support the shaft assembly 1 and seal the opening of the box assembly 2. In this embodiment, the end cover 3 is a split structure, wherein the inner cover 3-1 and the outer cover 3-2 are disc-shaped or ring-shaped structures, wherein the inner cover 3-1 is close to the inner wall of the box assembly 2, the skeleton oil seal sleeve is arranged in the through hole of the inner cover 3-1, and the corresponding shaft in the shaft assembly 1 is inserted in the through hole of the skeleton oil seal, the inner cover 3-1 and the outer cover 3-2 are arranged side by side, the outer cover 3-2 is close to the outer wall of the box assembly 2, and the outer cover 3-2 is fixed by bolts and abuts against the inner cover 3-1.

[0055] When the skeleton oil seal needs to be repaired or replaced, the outer cover 3-2 is disassembled, the inner cover 3-1 is removed, and the skeleton oil seal in the inner cover 3-1 is removed for repair or replacement. This arrangement further simplifies the operation of repairing or replacing the skeleton oil seal, and is convenient for operation in a small space.

[0056] In some embodiments, the top of the end cover 3 is provided with a groove 3-3, and the oil passage 7 is connected to the chamber where the end bearing of the input shaft 1-1 is located and the chamber where the end bearing of the output shaft 1-2 is located through the groove 3-3.

[0057] like Figure 4 As shown, a groove 3-3 is provided at one end of the middle through hole of the end cover 3 close to the inner wall of the box assembly 2, and the groove 3-3 has an opening at the end of the end cover 3 close to the inner wall of the box assembly 2. Optionally, the groove 3-3 is located at the end of the inner cover 3-1 away from the outer cover 3-2. After the end cover 3 is assembled on the box assembly 2, the groove 3-3 is located above and opposite to the oil channel 7, so that the first oil groove 6 can be connected to the chamber where the corresponding bearing is located. It is worth noting that the type of the groove 3-3 is not limited, such as the cross-sectional shape is U-shaped or trapezoidal, etc., as long as the above functions can be achieved.

[0058] In some embodiments, a ring groove 3-4 is provided in the middle through hole of the end cover 3, and the ring groove 3-4 is located on a side away from the upper box body 2-1 and the lower box body 2-2.

[0059] like Figure 4 and Figure 6 As shown, an annular groove 3-4 is provided at one end of the middle through hole of the end cover 3 close to the outer wall of the box assembly 2. Injecting butter into the annular groove 3-4 can effectively prevent dust from entering the box assembly 2. It should be noted that there is no limit on the number or type of the annular grooves 3-4. The cross-sectional shape can be trapezoidal or U-shaped, etc., and two, three or four can be provided, as long as the above functions can be achieved.

[0060] In some embodiments, a grease injection hole is provided on a side of the end cover 3 away from the box assembly 2 , the grease injection hole is communicated with the annular groove 3 - 4 , and a grease nozzle 10 is provided in the grease injection port.

[0061] like Figure 2 As shown, a grease injection hole is opened on the end cover 3, one end of the grease injection hole is opened on the surface of the end cover 3 exposed to the outside of the box assembly 2, and the other end of the grease injection hole is opened on the side wall surface of the annular groove 3-4. An oil nozzle 10 is inserted in the grease injection hole, and butter can be injected into the annular groove 3-4 through the oil nozzle 10, which is easy to operate.

[0062] In some embodiments, the inner wall of the upper box body 2-1 and / or the lower box body 2-2 is provided with a removable oil baffle plate 11, and the top edge of the oil baffle plate 11 is higher than the bottom edge of the end of the shaft assembly 1 for setting the bearing in the cavity.

[0063] like Figure 3 As shown, an oil baffle plate 11 is provided on the box body assembly 2 at the circular hole for plugging in the shaft assembly 1. The oil baffle plate 11 is located on the inner wall of the box body assembly 2 and can be fixed by means of threaded connection or clamping. Furthermore, the oil baffle plate 11 is located at the bottom of the circular hole, and the upper edge of the oil baffle plate 11 is higher than the bottom edge of the chamber where the corresponding bearing is located. With such a configuration, the lubricating oil that lubricates the bearing of the axle gear box will be blocked by the oil baffle plate 11 until the amount of the lubricating oil exceeds the limit of the oil baffle plate 11, and then it will flow back into the lower box body 2-2, so that the bearing can be fully lubricated. It is worth noting that there is no limitation on the type of the oil baffle plate 11, such as a D-type plate or a rectangular plate, as long as the above functions can be achieved.

[0064] During assembly, before the oil baffle plate 11 is installed or after the oil baffle plate 11 is removed from the box assembly 2, the corresponding output shaft 1-2, intermediate shaft 1-3 or output shaft 1-2 is inserted from the opening of the round hole on the outer wall of the box assembly 2 until it passes through the two opposite side walls of the box assembly 2; when disassembly is required, the oil baffle plate 11 is first removed from the box assembly 2, and then the corresponding output shaft 1-2, intermediate shaft 1-3 or output shaft 1-2 is pulled out from the box assembly 2. In this embodiment, the oil baffle plate 11 is detachably connected, which is beneficial to the installation and disassembly operations of the output shaft 1-2, input shaft 1-1 or intermediate shaft 1-3, and has a simple structure and low cost.

[0065] Preferably, the oil baffle plate 11 is fixed by bolts and latches. Such a configuration is beneficial to improving the stability of the oil baffle plate 11 and the sealing performance between the oil baffle plate 11 and the inner wall of the box assembly 2, so as to ensure the performance of the oil baffle plate 11 in blocking the lubricating oil.

[0066] Further preferably, the height of the top edge of the oil baffle plate 11 above the bottom edge of the chamber where the corresponding bearing is located is equal to the radius of the bearing roller. This arrangement effectively ensures the lubrication effect of the bearing.

[0067] In some embodiments, a breather 12 is provided on the top of the upper box body 2 - 1 , an oil baffle 13 is provided in the inner cavity of the upper box body 2 - 1 , and the oil baffle 13 is located at the bottom of the breather 12 .

[0068] The ventilator 12 is used to connect the inner cavity of the box assembly 2 with the outside atmosphere. Figure 1 and Figure 3As shown, the breather 12 is located at the top of the box assembly 2, and an oil baffle 13 is fixedly connected in the inner cavity of the box assembly 2, which can be fixed by threads or welding, etc. The oil baffle 13 blocks the opening of the breather 12 located on the inner wall of the box assembly 2, and a through hole is provided on the side of the oil baffle 13 away from the breather 12 for ventilation, so that the axle gearbox can be connected to the inner cavity of the box assembly 2 and the external environment through the breather 12, and can prevent splashing lubricating oil from gushing out of the box assembly 2 through the breather 12.

[0069] In some embodiments, a surface of the bottom plate of the ventilator 12 close to the box assembly 2 is provided with a protruding structure for plugging and mating with a positioning groove on the top of the upper box 2 - 1 .

[0070] like Figure 1 As shown, the breather 12 is fixedly connected to the box assembly 2 through a base plate, which can be connected by threaded connection or welding, etc. A protruding structure is provided on the bottom surface of the base plate, and the box assembly 2 is usually provided with a positioning groove. During assembly, the protruding structure of the base plate is first plugged into the positioning groove of the box assembly 2, and then the fixing operation is performed. Such a setting is conducive to the precise installation of the breather 12 and is easy to operate.

[0071] In some embodiments, the front end of the box assembly 2 has a hanging seat 4, and the hanging seat 4 is rotatably connected to a hanging rod 5, and the other end of the hanging rod 5 is provided with a joint assembly, and the joint assembly is an elastic member.

[0072] The suspension rod 5 is used to suspend the axle gearbox on the mechanical vehicle. Figure 1 and Figure 3 As shown, a hanger 4 is provided at the end of the box assembly 2, and the hanger 4 is rotatably connected to the suspension rod 5, and the two can be hinged or pinned; the suspension rod 5 is a rod-shaped structure, one end of the suspension rod 5 is connected to the hanger 4, and the other end of the suspension rod 5 has a joint assembly, so that the axle gear box can be rotatably hung on the mechanical vehicle. Such an arrangement is beneficial to reduce the damage that may be caused to the axle gear box due to inertia. In this embodiment, the suspension rod 5 adopts an elastic member, such as a vulcanized rubber member. Such an arrangement greatly improves the seismic resistance of the axle gear box.

[0073] Further, if Figure 3 As shown, there is a non-zero angle between the suspension rod 5 and the vertical direction, and the free end of the suspension rod 5 is inclined toward the side away from the box assembly 2. Such a configuration is helpful to reduce the possibility of the box assembly 2 colliding with the suspension rod 5 due to inertia. Optionally, the angle between the suspension rod 5 and the vertical direction is 5°.

[0074] In some embodiments, the hanger 4 includes a first side panel and a second side panel that are spaced apart, and the hanger 5 is disposed between the first side panel and the second side panel through a joint assembly; the end of the first side panel away from the box assembly 2 protrudes from the second side panel, and the end of the first side panel away from the box assembly 2 has a through hole 4-1.

[0075] like Figure 1 As shown, the hanger 4 is composed of a first side plate and a second side plate which are arranged in parallel, and the first side plate and the second side plate are arranged at an interval. The hanger 5 is connected to the hanger 4 through a joint assembly. When in use, the hanger 5 swings in the gap between the first side plate and the second side plate. Such a structure is simple and relatively stable.

[0076] Further, if Figure 1 and Figure 3 As shown, a through hole 4-1 is opened at the free end of the first side plate along its thickness direction, so that a chain or rope can be stably connected to the hanger 4. When in use, the other end of the chain or rope is fixedly connected to the mechanical vehicle, thereby protecting the axle gear box and effectively preventing it from falling.

[0077] In some embodiments, the opening end of the oil filling hole and / or the oil drain hole at the bottom of the lower box body 2-2 is provided with a magnetic screw plug 14, such as Figure 1 As shown, a magnetic screw plug 14 is provided in the bottom oil filling hole and / or oil drain hole of the box assembly 2. When in use, magnetic impurities such as iron and nickel in the lubricating oil can be adsorbed by the magnetic screw plug 14, which is helpful to reduce the damage that the impurities in the lubricating oil may cause to the axle gearbox.

[0078] Furthermore, the bottom wall of the inner cavity of the lower box body 2-2 is inclined, and the opening of the oil drain hole located on the inner wall of the lower box body 2-2 is the lowest point of the bottom wall of the lower box body 2-2. Such an arrangement is conducive to draining the lubricating oil in the lower box body 2-2. Optionally, the inclination angle between the bottom wall of the inner cavity of the lower box body 2-2 and the horizontal plane is 1°.

[0079] In some embodiments, an oil mark 15 is provided at the bottom of the lower box body 2-2. Such a setting is helpful for observing the liquid level of the lubricating oil in the lower box body 2-2.

[0080] In some embodiments, Figure 1 As shown, a platform is provided on the top of the box assembly 2 for fixing the sign, and the sign is usually riveted on the platform.

[0081] In some embodiments, Figure 1 As shown, the joint surface of the lower box body 2-2 and the upper box body 2-1 has a non-zero angle with the horizontal direction, and the joint surface is located on the side of the input shaft 1-1 lower than the side of the output shaft 1-2. Optionally, the angle between the joint surface of the lower box body 2-2 and the upper box body 2-1 and the horizontal direction is 25°.

[0082] It should be noted that the relational terms such as "first" and "second" mentioned above are merely used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the directional words "upper, lower, left, right" mentioned above are all defined based on the drawings in the specification.

[0083] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0084] The above is a detailed introduction to the axle gearbox provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An axle gearbox, comprising a shaft assembly (1) and a housing assembly (2), wherein the shaft assembly (1) comprises an input shaft (1-1), an output shaft (1-2) and an intermediate shaft (1-3) rotatably arranged on the housing assembly (2), wherein the input shaft (1-1), the intermediate shaft (1-3) and the output shaft (1-2) are meshed and transmitted in sequence; the housing assembly (2) comprises a lower housing (2-2) and an upper housing (2-1) buckled with an opening at the top of the lower housing (2-2), characterized in that: Also includes: Two groups of first oil grooves (6) are both arranged at the top of the side wall of the upper box body (2-1), and one group of the first oil grooves (6) is located on one side of the input shaft (1-1), and the other group of the first oil grooves (6) is located on one side of the output shaft (1-2); An oil passage (7) for connecting a corresponding first oil groove (6) with a chamber where the end bearing of the input shaft (1-1) is located, and another corresponding first oil groove (6) with a chamber where the end bearing of the output shaft (1-2) is located; A second oil groove (8) is provided on the end surface of the lower housing (2-2), and the second oil groove (8) is connected to the chamber where the end bearing of the intermediate shaft (1-3) is located.

2. The axle gearbox according to claim 1, characterized in that: A skeleton oil seal (9) is sandwiched between the shaft section of the input shaft (1-1) extending into the housing assembly (2) and the housing assembly (2); And / or, the skeleton oil seal (9) is sandwiched between the shaft section of the output shaft (1-2) extending into the housing assembly (2) and the housing assembly (2).

3. The axle gearbox according to claim 2, characterized in that: It also comprises an end cover (3), and the end cover (3) is arranged at the end of the output shaft (1-2) extending into the box assembly (2) and the end of the output shaft (1-2) extending into the box assembly (2); The end cover (3) comprises an inner cover (3-1) and an outer cover (3-2); the inner cover (3-1) is sandwiched between the outer cover (3-2) and the upper box body (2-1) and the lower box body (2-2); the skeleton oil seal (9) is sandwiched between the rotating shaft assembly (1) and the inner cover (3-1), and the outer cover (3-2) abuts against the skeleton oil seal.

4. The axle gearbox according to claim 3, characterized in that: The end cover (3) has a top with a groove (3-3), and the oil passage (7) is connected to the chamber where the end bearing of the input shaft (1-1) is located and the chamber where the end bearing of the output shaft (1-2) is located through the groove (3-3).

5. The axle gearbox according to claim 3, characterized in that: The middle through hole (4-1) of the end cover (3) is provided with an annular groove (3-4), and the annular groove (3-4) is located at a side away from the upper box body (2-1) and the lower box body (2-2); And / or, a side of the end cover (3) away from the box assembly (2) has a grease injection hole, the grease injection hole is connected to the annular groove (3-4), and an oil nozzle (10) is provided in the grease injection hole.

6. The axle gearbox according to claim 1, characterized in that: The inner side wall of the upper box body (2-1) and / or the lower box body (2-2) is provided with a detachable oil baffle plate (11), and the top edge of the oil baffle plate (11) is higher than the bottom edge of the chamber where the bearing is located at the end of the shaft assembly (1).

7. The axle gearbox according to any one of claims 1 to 6, characterized in that: A breather (12) is provided on the top of the upper box body (2-1), an oil baffle (13) is provided in the inner cavity of the upper box body (2-1), and the oil baffle (13) is located at the bottom of the breather (12).

8. The axle gearbox according to claim 7, characterized in that: A protruding structure is provided on the surface of the bottom plate of the ventilator (12) close to the box assembly (2) for plugging and cooperating with the positioning groove on the top of the upper box (2-1).

9. The axle gearbox according to any one of claims 1 to 6, characterized in that: The front end of the box assembly (2) is provided with a hanging seat (4), and the hanging seat (4) is rotatably connected to a hanging rod (5), and the other end of the hanging rod (5) is provided with a joint assembly, and the joint assembly is an elastic member; And / or, the suspension seat (4) comprises a first side plate and a second side plate which are arranged at an interval, and the suspension rod (5) is arranged between the first side plate and the second side plate through the joint assembly; The end of the first side plate away from the box assembly (2) protrudes from the second side plate, and the end of the first side plate away from the box assembly (2) has a through hole (4-1).

10. The axle gearbox according to any one of claims 1 to 6, characterized in that: A magnetic screw plug (14) is provided at the opening end of the oil filling hole and / or the oil drain hole at the bottom of the lower box body (2-2).

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