An axle gear case assembly

Abstract

The application discloses a vehicle axle gear box assembly, which comprises a lower box body and a two-axle upper box body and a three-axle upper box body which are selectively combined with the lower box body, and the three-axle upper box body is combined by a first sub-box body and a second sub-box body; when the two-axle upper box body is combined with the lower box body, the vehicle axle gear box assembly is a two-axle one-stage transmission layout, and when the three-axle upper box body is combined with the lower box body, the vehicle axle gear box assembly is a three-axle two-stage transmission layout. The vehicle axle gear box assembly can be changed between the two-axle one-stage transmission layout and the three-axle two-stage transmission layout as required, the layout structure is simplified, the universality and interchangeability of modular components are improved, the product manufacturing cost is reduced, and the vehicle axle gear box assembly has higher applicability to different use conditions of railway engineering machinery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of railway engineering vehicles, in particular to an axle gear box assembly. BACKGROUND

[0002] Due to the limitations of construction methods, working environment and working machinery and other conditions, the power source of railway engineering machinery is still mainly internal combustion power, and the transmission mode is hydraulic and hydrostatic transmission. Regardless of which transmission mode is used, an axle gear box needs to be arranged on the axle to realize the conversion and output of power to the wheels. Considering the adhesion weight limit of railway engineering vehicles, multiple axles are generally driven simultaneously to avoid wheel skidding and damage to the rail and wheel tread.

[0003] Under normal circumstances, to achieve multi-axle drive, the traditional railway engineering vehicle needs to install a set of axle gear boxes on each drive axle and arrange a transfer gear box in the transmission system to drive each axle gear box individually. This transmission arrangement is relatively complex, requires additional transmission shafts and bridge connecting shafts, and has high system cost.

[0004] In addition, if a single gear box is used to achieve multi-axle drive, because the transmission layout of the gear box is determined at the beginning of the design, the structure of the gear box cannot be changed after production. Each multi-axle drive gear box corresponds to only one transmission layout, and can only achieve transmission under this layout. The structure cannot be changed according to the transmission needs, is complex, and has poor universality.

[0005] Therefore, how to provide an axle gear box assembly that solves the above technical problems is a technical problem that technicians in the field need to solve. SUMMARY

[0006] The purpose of the present application is to provide an axle gear box assembly that can be changed between two-axle primary transmission layout and three-axle secondary transmission layout as needed, simplifying the layout structure, improving the universality and interchangeability of modular components, reducing product manufacturing costs, and having higher applicability to different use conditions of railway engineering machinery.

[0007] To achieve the above purpose, the present application provides an axle gear box assembly, comprising a lower box body and a two-axle upper box body and a three-axle upper box body which are selectively combined with the lower box body, the three-axle upper box body being composed of a first sub-box body and a second sub-box body;

[0008] When the two-axle upper box body and the lower box body are combined, the axle gear box assembly is a two-axle primary transmission layout: the two-axle upper box body and the lower box body are arranged with a first transmission shaft and a second transmission shaft, and the first transmission shaft and the second transmission shaft are in transmission connection;

[0009] When the three-axle upper box is combined with the lower box, the axle gear box assembly is a three-axle two-stage transmission layout: a first transmission shaft and a second transmission shaft are arranged between the second sub-box and the lower box, and a third transmission shaft is arranged between the first sub-box and the second sub-box, and the first transmission shaft, the second transmission shaft and the third transmission shaft are sequentially transmission connected.

[0010] In some embodiments, the first transmission shaft and the second transmission shaft determine a first common plane, and the second transmission shaft and the third transmission shaft determine a second common plane.

[0011] When the axle gear box assembly is a two-axle one-stage transmission layout, the two-axle upper box and the lower box are in a first common plane.

[0012] When the axle gear box assembly is a three-axle two-stage transmission layout, the second sub-box and the lower box are in a first common plane, and the first sub-box and the second sub-box are in parallel with the first common plane and intersect with the second common plane, and the intersection line is the axis of the third transmission shaft.

[0013] In some embodiments, the angle between the axis of the first transmission shaft and the axis of the second transmission shaft is 90°, the angle between the axis of the second transmission shaft and the axis of the third transmission shaft is 0°, and the distance between the axis of the second transmission shaft and the axis of the third transmission shaft and the angle between the first common plane and the second common plane are determined according to the size limit of the axle gear box assembly and the transmission ratio.

[0014] In some embodiments, when the axle gear box assembly is a two-axle one-stage transmission layout, a fourth bearing seat, a fifth bearing seat and a sixth bearing seat with a rotation center line coinciding with the axis of the second transmission shaft are arranged between the two-axle upper box and the lower box, and a seventh bearing seat and an eighth bearing seat with a rotation center line coinciding with the axis of the first transmission shaft are arranged.

[0015] When the axle gear box assembly is a three-axle two-stage transmission layout, a first bearing seat, a second bearing seat and a third bearing seat with a rotation center line coinciding with the axis of the third transmission shaft are arranged between the first sub-box and the second sub-box, a fourth bearing seat, a fifth bearing seat and a sixth bearing seat with a rotation center line coinciding with the axis of the second transmission shaft are arranged between the second sub-box and the lower box, and a seventh bearing seat and an eighth bearing seat with a rotation center line coinciding with the axis of the first transmission shaft are arranged.

[0016] In some embodiments, the second bearing seat and the first bearing seat are provided with a first oil inlet and a first oil outlet, the third bearing seat is provided with a second oil inlet and a second oil outlet, the fourth bearing seat and the fifth bearing seat are provided with a third oil inlet and a third oil outlet.

[0017] In some embodiments, the lower box is internally provided with a bearing oil baffle plate located on one side of the seventh bearing seat and the eighth bearing seat, which is used to store lubricating oil and lubricate the seventh bearing seat and the eighth bearing seat.

[0018] In some embodiments, the lower box is internally provided with a first oil pool and a second oil pool, which are communicated through a first oil pool oil passing hole and a second oil pool oil passing hole, and the first oil pool and the bottom of the second oil pool have a height difference, and the first oil pool oil passing hole, the second oil pool oil passing hole and the bottom of the second oil pool have a height difference.

[0019] The driven gear part of the gear transmission system composed of the third transmission shaft and the second transmission shaft is located in the second oil pool, and the driven gear part of the gear transmission system composed of the second transmission shaft and the first transmission shaft is located in the first oil pool.

[0020] In some embodiments, a gear oil baffle plate is provided in the first oil pool, which divides the first oil pool into different zones, and the driven gear part of the gear transmission system composed of the second transmission shaft and the first transmission shaft is located in the oil pool zone in the gear oil baffle plate.

[0021] In some embodiments, the lower box, the two-axis upper box and the three-axis upper box are externally provided with heat dissipation rib structures.

[0022] With respect to the above background technology, the axle gear box assembly provided by the present application comprises a lower box, and a two-axis upper box and a three-axis upper box which are selectively combined with the lower box, wherein the three-axis upper box is composed of a first sub-box and a second sub-box.

[0023] The axle gear box assembly can be changed between a two-axis primary transmission layout and a three-axis secondary transmission layout as needed: when the two-axis upper box is combined with the lower box, the axle gear box assembly is in a two-axis primary transmission layout: the first transmission shaft and the second transmission shaft are arranged between the two-axis upper box and the lower box, and the first transmission shaft and the second transmission shaft are transmissionally connected; when the three-axis upper box is combined with the lower box, the axle gear box assembly is in a three-axis secondary transmission layout: the first transmission shaft and the second transmission shaft are arranged between the second sub-box and the lower box, and the third transmission shaft is arranged between the first sub-box and the second sub-box, and the first transmission shaft, the second transmission shaft and the third transmission shaft are sequentially transmissionally connected. Through the above changes, the axle gear box assembly simplifies the layout structure, improves the universality and interchangeability of modular components, reduces product manufacturing costs, and has higher applicability to different use conditions of railway engineering machinery. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on the provided drawings without creative labor.

[0025] Figure 1 The right view of the axle gear box assembly under the three-axle two-stage transmission layout provided by the embodiment of the present application;

[0026] Figure 2 The left view of the axle gear box assembly under the two-axle one-stage transmission layout provided by the embodiment of the present application;

[0027] Figure 3 The transmission shaft relationship schematic diagram of the axle gear box assembly provided by the embodiment of the present application;

[0028] Figure 4 The rear view of the axle gear box assembly under the three-axle two-stage transmission layout provided by the embodiment of the present application;

[0029] Figure 5 The left view of the axle gear box assembly under the three-axle two-stage transmission layout provided by the embodiment of the present application;

[0030] Figure 6 The Figure 1 B-B projection view of the axle gear box assembly;

[0031] Figure 7 The Figure 1 C-C projection view of the axle gear box assembly;

[0032] Figure 8 The Figure 5 D-D projection view of the axle gear box assembly;

[0033] Figure 9 The Figure 4 E-E projection view of the axle gear box assembly;

[0034] Figure 10 The Figure 4 F-F projection view of the axle gear box assembly;

[0035] Figure 11 The Figure 4 G-G projection view of the axle gear box assembly.

[0036] Wherein:

[0037] 110 - lower box, 121 - two-shaft upper box, 122 - three-shaft upper box, 1221 - first sub-box, 1222 - second sub-box;

[0038] 101 - first transmission shaft, 102 - second transmission shaft, 103 - third transmission shaft;

[0039] 1011 - first transmission shaft end cover, 1012 - first transmission shaft end cover sealing structure, 1013 - first transmission shaft axial adjustment washer;

[0040] 1021 - second transmission shaft end cover, 1022 - second transmission shaft bearing seat ring, 1023 - second transmission shaft end cover sealing structure, 1024 - second transmission shaft axial adjustment washer, 1025 - second transmission shaft shaft bearing snap ring;

[0041] 1031 - third transmission shaft front end cover, 1032 - third transmission shaft front end cover sealing structure, 1033 - third transmission shaft rear end cover;

[0042] 131 - gear oil baffle, 132 - bearing oil baffle, 133 - upper cover oil baffle, 134 - box upper cover plate, 135 - box lower cover plate, 136 - oil filler plug, 137 - breather, 138 - oil window, 139 - first oil drain plug, 140 - second oil drain plug, 141 - oil filler pipe;

[0043] 151 - first oil inlet, 152 - first oil drain, 153 - second oil inlet, 154 - second oil drain, 155 - third oil inlet, 156 - third oil drain, 157 - first oil pool oil passage, 158 - second oil pool oil passage, 159 - box oil passage, 160 - fourth oil inlet, 161 - accessory mounting base;

[0044] 171 - first bearing seat, 172 - second bearing seat, 173 - third bearing seat, 174 - fourth bearing seat, 175 - fifth bearing seat, 176 - sixth bearing seat, 177 - seventh bearing seat, 178 - eighth bearing seat, 179 - torsion arm mounting seat. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0047] Reference is made to Figure 1 and Figure 2 wherein, Figure 1 Fig. 1 is a right view of a vehicle axle gear box assembly provided by an embodiment of the present application in a three-axle two-stage transmission layout, Figure 2 Fig. 2 is a left view of a vehicle axle gear box assembly provided by an embodiment of the present application in a two-axle one-stage transmission layout.

[0048] In a first specific embodiment, the present application provides a vehicle axle gear box assembly, which has two different variations; in the two different variations, the common part is a lower box 110; in the two different variations, the varying part is an upper box, i.e. a two-axle upper box 121 and a three-axle upper box 122 which are selectively combined with the lower box 110. The three-axle upper box 122 is composed of a first sub-box 1221 and a second sub-box 1222.

[0049] The vehicle axle gear box assembly can be changed between a two-axle one-stage transmission layout and a three-axle two-stage transmission layout as needed. If it is a two-axle one-stage transmission layout, the two-axle upper box 121 is selected as the upper box, and the upper box and the lower box 110 are combined to form the vehicle axle gear box assembly; if it is a three-axle two-stage transmission layout, the three-axle upper box 122 is selected as the upper box, and the upper box and the lower box 110 are combined to form the vehicle axle gear box assembly.

[0050] Specifically, when the two-axle upper box 121 is combined with the lower box 110, the vehicle axle gear box assembly is in a two-axle one-stage transmission layout: the first transmission shaft 101 and the second transmission shaft 102 are arranged between the two-axle upper box 121 and the lower box 110, and the first transmission shaft 101 and the second transmission shaft 102 are in transmission connection.

[0051] When the three-axle upper box 122 is combined with the lower box 110, the vehicle axle gear box assembly is in a three-axle two-stage transmission layout: the first transmission shaft 101 and the second transmission shaft 102 are arranged between the second sub-box 1222 and the lower box 110, the third transmission shaft 103 is arranged between the first sub-box 1221 and the second sub-box 1222, and the first transmission shaft 101, the second transmission shaft 102 and the third transmission shaft 103 are in transmission connection in sequence.

[0052] The vehicle axle gear box assembly changes as described above, simplifies the layout structure, improves the universality and interchangeability of modular components, reduces product manufacturing costs, and at the same time has higher applicability to different use conditions of railway engineering machinery.

[0053] It should be noted that the above axle gear box assembly is an axle gear box assembly suitable for railway engineering vehicles, which is suitable for three-axle two-stage gear transmission layout structure. By changing the corresponding box module, another axle gear box assembly suitable for two-axle one-stage gear transmission layout structure is formed, realizing the modular manufacturing of the two boxes, and the accessories have strong universality and interchangeability.

[0054] Please refer to Figure 3 , Figure 3 The transmission shaft relationship diagram of the axle gear box assembly provided in the embodiment of the present application is shown.

[0055] In the embodiment, taking three-axle two-stage gear transmission layout as an example, the three axles represent the first transmission shaft 101, the second transmission shaft 102 and the third transmission shaft 103 of the gear transmission system of the axle gear box assembly, the first transmission shaft 101 and the second transmission shaft 102 form a gear transmission system, and the second transmission shaft 102 and the third transmission shaft 103 form another gear transmission system. Taking two-axle one-stage gear transmission layout as an example, the two axles represent the first transmission shaft 101 and the second transmission shaft 102 of the gear transmission system of the axle gear box assembly, and the first transmission shaft 101 and the second transmission shaft 102 form a gear transmission system.

[0056] In some embodiments, the first transmission shaft 101 and the second transmission shaft 102 determine a first common plane, and the second transmission shaft 102 and the third transmission shaft 103 determine a second common plane.

[0057] In the embodiment, when the axle gear box assembly is in three-axle two-stage transmission layout, the second sub-box 1222 and the sub-box surface of the lower box 110 are the first common plane, and the sub-box surfaces of the first sub-box 1221 and the second sub-box 1222 are parallel to the first common plane and intersect with the second common plane to form the axis of the third transmission shaft 103. When the axle gear box assembly is in two-axle one-stage transmission layout, the sub-box surface of the upper box 121 and the sub-box surface of the lower box 110 are the first common plane.

[0058] Please continue to refer to Figure 3 In some embodiments, the angle between the axes of the first transmission shaft 101 and the second transmission shaft 102 is 90°, and the angle between the axes of the second transmission shaft 102 and the third transmission shaft 103 is 0°.

[0059] It should be noted that the embodiment only gives a specific scheme in which the angle between the axes of the first transmission shaft 101 and the second transmission shaft 102 is 90° and the angle between the axes of the second transmission shaft 102 and the third transmission shaft 103 is 0° in combination with the drawings, but only as a specific implementation, which cannot limit the angle between the axes of the first transmission shaft 101 and the second transmission shaft 102 and the angle between the axes of the second transmission shaft 102 and the third transmission shaft 103 in the present application, which can only be implemented in this specific scheme.

[0060] In addition, the axis distance S between the second transmission shaft 102 and the third transmission shaft 103, and the angle J between the first common plane and the second common plane, can be determined according to the layout size limit of the gear box and the speed ratio change of the transmission gear train, which should not be limited here.

[0061] In some embodiments, please refer to Figures 4 to 11 , wherein, Figure 4 the rear view of the axle gear box assembly under the three-axle two-stage transmission layout, Figure 5 the left view of the axle gear box assembly under the three-axle two-stage transmission layout, Figure 6 is Figure 1 the B-B projection view of the axle gear box assembly, Figure 7 is Figure 1 the C-C projection view of the axle gear box assembly, Figure 8 is Figure 5 the D-D projection view of the axle gear box assembly, Figure 9 is Figure 4 the E-E projection view of the axle gear box assembly, Figure 10 is Figure 4 the F-F projection view of the axle gear box assembly, Figure 11 is Figure 4 the G-G projection view of the axle gear box assembly.

[0062] For the three-axle two-stage gear transmission layout, in addition to the above-mentioned lower box 110, three-axle upper box 122, first transmission shaft 101, second transmission shaft 102 and third transmission shaft 103, it also includes one-axis end cover and sealing structure, two-axis end cover and sealing structure, three-axis end cover and sealing structure corresponding to the first transmission shaft 101, the second transmission shaft 102 and the third transmission shaft 103 respectively, as well as gear oil baffle 131, bearing oil baffle 132, upper cover oil baffle 133, box upper cover plate 134, box lower cover plate 135, oil filling plug 136, breather 137, oil window 138, first oil drain plug 139, second oil drain plug 140 and oil filler pipe 141.

[0063] For the two-axle one-stage gear transmission layout, in addition to the above-mentioned lower box 110, two-axle upper box 121, first transmission shaft 101 and second transmission shaft 102, it also includes one-axis end cover and sealing structure, two-axis end cover and sealing structure corresponding to the first transmission shaft 101 and the second transmission shaft 102 respectively, as well as gear oil baffle 131, bearing oil baffle 132, upper cover oil baffle 133, box upper cover plate 134, box lower cover plate 135, oil filling plug 136, breather 137, oil window 138, first oil drain plug 139, second oil drain plug 140 and oil filler pipe 141.

[0064] In combination with the above, the three-shaft two-stage gear transmission layout can be changed into the two-shaft one-stage gear transmission layout by replacing the three-shaft upper box 122, the three-shaft end cover and the sealing structure with the two-shaft upper box 121.

[0065] The one-shaft end cover and the sealing structure include a first transmission shaft end cover 1011, a first transmission shaft end cover sealing structure 1012 and a first transmission shaft axial adjustment washer 1013; the two-shaft end cover and the sealing structure include a second transmission shaft end cover 1021, a second transmission shaft bearing seat ring 1022, a second transmission shaft end cover sealing structure 1023, a second transmission shaft axial adjustment washer 1024 and a second transmission shaft shaft bearing snap ring 1025; and the three-shaft end cover and the sealing structure include a third transmission shaft front end cover 1031, a third transmission shaft front end cover sealing structure 1032 and a third transmission shaft rear end cover 1033.

[0066] In the embodiment, the first sub-box 1221 and the second sub-box 1222 are connected to the lower box 110 by bolts; the two-shaft upper box 121 and the lower box 110 are connected by bolts. The third transmission shaft front end cover 1031 and the third transmission shaft rear end cover 1033 are fixed on the first sub-box 1221 and the second sub-box 1222 by bolts. The second transmission shaft end cover 1021 and the second transmission shaft bearing seat ring 1022 are fixed on the second sub-box 1222 and the lower box 110 or the two-shaft upper box 121 and the lower box 110 by bolts. The first transmission shaft end cover 1011 is fixed on the second sub-box 1222 and the lower box 110 or the two-shaft upper box 121 and the lower box 110 by bolts. The outer edge of the third transmission shaft front end cover sealing structure 1032 is fixed on the inner ring of the third transmission shaft front end cover 1031.

[0067] The outer edge of the second transmission shaft end cover sealing structure 1023 is fixed on the inner ring of the second transmission shaft end cover 1021.

[0068] The first transmission shaft end cover sealing structure 1012 is fixed on the inner ring of the first transmission shaft end cover 1011.

[0069] In addition, the axle gear box assembly adapted to the three-shaft two-stage transmission layout and the axle gear box assembly adapted to the two-shaft one-stage transmission layout are provided with a plurality of bearing seats.

[0070] Specifically, when the axle gear box assembly is adapted to the two-shaft one-stage transmission layout, the fourth bearing seat 174, the fifth bearing seat 175 and the sixth bearing seat 176 whose rotation center line coincides with the axis of the second transmission shaft 102, and the seventh bearing seat 177 and the eighth bearing seat 178 whose rotation center line coincides with the axis of the first transmission shaft 101 are arranged between the two-shaft upper box 121 and the lower box 110.

[0071] When the axle gear box is a three-axle two-stage transmission layout, the first axle bearing seat 171, the second axle bearing seat 172, and the third axle bearing seat 173 are arranged between the first sub-box 1221 and the second sub-box 1222, the rotational center line of which coincides with the axis of the third transmission shaft 103; the fourth axle bearing seat 174, the fifth axle bearing seat 175, and the sixth axle bearing seat 176 are arranged between the second sub-box 1222 and the lower box 110, the rotational center line of which coincides with the axis of the second transmission shaft 102; the seventh axle bearing seat 177 and the eighth axle bearing seat 178 are arranged between the second sub-box 1222 and the lower box 110, the rotational center line of which coincides with the axis of the first transmission shaft 101.

[0072] Taking the fourth axle bearing seat 174 and the fifth axle bearing seat 175 as an example, the fourth axle bearing seat 174 and the fifth axle bearing seat 175 are installed with rolling bearings, which are installed in the bottom hole between the two-axle upper box 121 and the lower box 110 or between the second sub-box 1222 and the lower box 110 through the second transmission shaft bearing seat ring 1022, and the movement amount of the second transmission shaft 102 along the axial direction is adjusted through the second transmission shaft axial adjustment washer 1024.

[0073] In some embodiments, the first oil pool and the second oil pool are arranged inside the lower box 110, and the first oil pool and the second oil pool are communicated through the first oil pool oil passing hole 157 and the second oil pool oil passing hole 158.

[0074] In this embodiment, the first oil pool is a large oil pool, and the second oil pool is a small oil pool. The driven gear part of the gear transmission system composed of the third transmission shaft 103 and the second transmission shaft 102 is located in the second oil pool, i.e., the small oil pool, and the driven gear part of the gear transmission system composed of the second transmission shaft 102 and the first transmission shaft 101 is located in the first oil pool, i.e., the large oil pool. The bottom of the two oil pools is designed to have a certain height difference H1. The first oil pool oil passing hole 157, the second oil pool oil passing hole 158, and the bottom of the second oil pool, i.e., the small oil pool, have a height difference H2. The height differences H1 and H2 are determined according to the outer diameter of the driven gear of the gear transmission system composed of the third transmission shaft 103 and the second transmission shaft 102, so as to ensure that the driven gear of the gear transmission system can be soaked to a certain depth, and the splash lubrication effect of the gear system is ensured.

[0075] In some embodiments, the gear oil baffle 131 is arranged in the first oil pool, and the gear oil baffle 131 partitions the first oil pool. The driven gear part of the gear transmission system composed of the second transmission shaft 102 and the first transmission shaft 101 is located in the oil pool partitioned by the gear oil baffle 131.

[0076] In this embodiment, the large oil pool of the lower box 110 is partitioned by the gear oil baffle 131 installed in the lower box 110, so that the driven gear part of the gear transmission system composed of the second transmission shaft 102 and the first transmission shaft 101 is located in the oil pool partitioned by the gear oil baffle 131. This can reduce the oil stirring loss of the gear to the large oil pool and increase the splash lubrication effect of the driven gear of the gear transmission system.

[0077] In some embodiments, the lower box 110 is provided with a bearing oil baffle 132.

[0078] In the present embodiment, the bearing oil baffle 132 is located on one side of the seventh bearing seat 177 and the eighth bearing seat 178, and can store a certain amount of lubricating oil to lubricate the bearings at the seventh bearing seat 177 and the eighth bearing seat 178.

[0079] In some embodiments, oil inlet holes and oil discharge holes are provided at each bearing seat.

[0080] Specifically, the second bearing seat 172 and the first bearing seat 171 are provided with a first oil inlet 151 and a first oil discharge hole 152, the third bearing seat 173 is provided with a second oil inlet 153 and a second oil discharge hole 154, the fourth bearing seat 174 and the fifth bearing seat 175 are provided with a third oil inlet 155 and a third oil discharge hole 156, and the seventh bearing seat 177 and the eighth bearing seat 178 are provided with a fourth oil inlet 160 at the end cover; the above oil inlets ensure a stable supply of lubricating oil to the bearings, and the above oil discharge holes ensure that the lubricating oil of the bearings is not too much.

[0081] In some embodiments, the lower box 110, the two-axis upper box 121 and the three-axis upper box 122 are provided with heat dissipation rib structures on the outer sides.

[0082] In the present embodiment, the lower box 110, the two-axis upper box 121, the first sub-box 1221 and the second sub-box 1222 are provided with multiple heat dissipation rib structures on the outer sides, which increase the surface area of the box and thus increase the heat dissipation effect.

[0083] In addition, the lower box 110 is also provided with a box oil passage 159 for lubricating oil pump oil, an oil pool oil discharge hole, a liquid level window mounting hole, a lower oil filling hole; the first oil discharge plug 139 corresponds to the large oil pool, the second oil discharge plug 140 corresponds to the small oil pool, and is installed in the oil pool oil discharge hole by screwing; the oil window 138 for observing the liquid level of the lubricating oil is installed in the liquid level window mounting hole; the oil filling pipe 141 is installed in the lower oil filling hole by bolting.

[0084] The lower box cover plate 135 is provided with a lubricating oil pump mounting seat; the second sub-box 1222 and the two-axis upper box 121 are provided with a torsion arm mounting seat 179 on the outer sides; the accessory mounting base 161 is arranged in the first sub-box 1221; the upper box cover plate 134 is bolted to the top of the first sub-box 1221 or the two-axis upper box 121, and the oil filling plug 136 and the breather 137 are screwed to the upper box cover plate 134; the upper cover oil plate 133 is bolted to the upper part of the first sub-box 1221 or the two-axis upper box 121, located below the upper box cover plate 134, preventing the gear from splashing lubricating oil to soak the breather 137.

[0085] The axle gear box and the engineering vehicle with the axle gear box using the axle gear box assembly have all the beneficial effects of the axle gear box assembly.

[0086] The engineering vehicle, especially a railway engineering vehicle, uses the axle gear box assembly to simplify the layout structure of the drive train and reduce the cost of the drive train; the axle gear box assembly can be used for single input and two axle driving to meet the low-speed high-load operation; the design of the axle gear box assembly is considered in terms of the layout structure of the gear train and the manufacturing versatility, and the product manufacturing cost is reduced.

[0087] In summary, the following features are provided:

[0088] Compact layout and simple structure The box has no complex internal oil passage and oil collecting device.

[0089] High versatility The two-stage transmission box body is suitable for three-axle two-stage gear transmission layout, and by changing the first sub-box body and the second sub-box body into a two-axle upper box body, a one-stage transmission box body suitable for two-axle one-stage gear transmission layout can be extended.

[0090] Providing a forced lubrication interface and a partitioned oil pool design effectively reduces the oil stirring loss of the gear, while ensuring the lubrication requirements of the bearing and the gear surface.

[0091] In summary, the axle gear box assembly has higher applicability to the two-axle driving and low-speed high-power use conditions of the railway engineering machinery.

[0092] It should be noted that many components mentioned in the present application are general standard components or components known to those skilled in the art, and their structure and principle can be known by technical personnel through technical manuals or through conventional experimental methods.

[0093] It should be noted that in the present specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between the entities.

[0094] The axle gear box assembly provided by the present application is described in detail above. The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled personnel in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An axle gear case body assembly characterized by, The axle gear box assembly comprises a lower box (110) and a two-axle upper box (121) and a three-axle upper box (122) which is combined with the lower box (110) and is composed of a first sub-box (1221) and a second sub-box (1222); When the two-axle upper box (121) is combined with the lower box (110), the axle gear box assembly is a two-axle primary transmission layout: the first transmission shaft (101) and the second transmission shaft (102) are arranged between the two-axle upper box (121) and the lower box (110) and are in transmission connection; When the three-axle upper box (122) is combined with the lower box (110), the axle gear box assembly is a three-axle secondary transmission layout: the first transmission shaft (101) and the second transmission shaft (102) are arranged between the second sub-box (1222) and the lower box (110), and the third transmission shaft (103) is arranged between the first sub-box (1221) and the second sub-box (1222), and the first transmission shaft (101), the second transmission shaft (102) and the third transmission shaft (103) are in transmission connection in sequence; The angle between the axes of the first transmission shaft (101) and the second transmission shaft (102) is 90°, and the angle between the axes of the second transmission shaft (102) and the third transmission shaft (103) is 0°.

2. The axle gear case body assembly of claim 1, wherein, The first transmission shaft (101) and the second transmission shaft (102) determine a first common plane, and the second transmission shaft (102) and the third transmission shaft (103) determine a second common plane; When the axle gear box assembly is a two-axle primary transmission layout, the dividing surface of the two-axle upper box (121) and the lower box (110) is the first common plane; When the axle gear box assembly is a three-axle secondary transmission layout, the dividing surface of the second sub-box (1222) and the lower box (110) is the first common plane, and the dividing surface of the first sub-box (1221) and the second sub-box (1222) is parallel to the first common plane and the intersection line between the second common plane is the axis of the third transmission shaft (103).

3. The axle gear case body assembly of claim 2, wherein, The distance between the axes of the second transmission shaft (102) and the third transmission shaft (103) and the angle between the first common plane and the second common plane are determined according to the size limitation of the axle gear box assembly and the transmission ratio.

4. The axle gear case body assembly of claim 1, wherein, When the axle gear box assembly is a two-axle primary transmission layout, the fourth bearing seat (174) whose rotation center line coincides with the axis of the second transmission shaft (102), the fifth bearing seat (175) and the sixth bearing seat (176) are arranged between the two-axle upper box (121) and the lower box (110), and the seventh bearing seat (177) and the eighth bearing seat (178) whose rotation center line coincides with the axis of the first transmission shaft (101) are arranged between the two-axle upper box (121) and the lower box (110); When the axle gear box total assembly is in three-axle two-stage transmission layout, a first bearing seat (171) with a rotation center line coinciding with the axis of the third transmission shaft (103), a second bearing seat (172), and a third bearing seat (173) are arranged between the first sub-box (1221) and the second sub-box (1222); a fourth bearing seat (174), a fifth bearing seat (175), and a sixth bearing seat (176) with a rotation center line coinciding with the axis of the second transmission shaft (102) are arranged between the second sub-box (1222) and the lower box (110); a seventh bearing seat (177) and an eighth bearing seat (178) with a rotation center line coinciding with the axis of the first transmission shaft (101) are arranged.

5. The axle gear case body assembly of claim 4, wherein, The first bearing seat (171) and the second bearing seat (172) are provided with a first oil inlet (151) and a first oil outlet (152), and the third bearing seat (173) is provided with a second oil inlet (153) and a second oil outlet (154); the fourth bearing seat (174) and the fifth bearing seat (175) are provided with a third oil inlet (155) and a third oil outlet (156).

6. The axle gear case body assembly of claim 4, wherein, The lower box (110) is provided with a bearing oil baffle (132) on one side of the seventh bearing seat (177) and the eighth bearing seat (178), which is used for storing lubricating oil and lubricating the seventh bearing seat (177) and the eighth bearing seat (178).

7. The axle gear case assembly of any one of claims 1-6, wherein, The lower box (110) is provided with a first oil pool and a second oil pool, which are communicated through a first oil pool oil passing hole (157) and a second oil pool oil passing hole (158), and the first oil pool and the second oil pool have a height difference between the bottoms thereof; the first oil pool oil passing hole (157) and the second oil pool oil passing hole (158) have a height difference with the bottom of the second oil pool. The driven gear part of the gear transmission system composed of the third transmission shaft (103) and the second transmission shaft (102) is located in the second oil pool, and the driven gear part of the gear transmission system composed of the second transmission shaft (102) and the first transmission shaft (101) is located in the first oil pool.

8. The axle gear case body assembly of claim 7, wherein, A gear oil baffle (131) is arranged in the first oil pool to divide the first oil pool into different zones, and the driven gear part of the gear transmission system composed of the second transmission shaft (102) and the first transmission shaft (101) is located in the oil pool zone in the gear oil baffle (131).

9. The axle gear case assembly of any one of claims 1-6, wherein, The lower box (110), the two-axle upper box (121), and the three-axle upper box (122) are provided with heat dissipation rib structures on the outer sides thereof.

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