Speed reducer shell and speed reducer

Abstract

The speed reducer shell comprises a body, the body comprises an inner surface and an outer surface, a speed reducer inner cavity and a plurality of pairs of oppositely-arranged bearing chambers are limited on the inner surface, and the bearing chambers are contained in the speed reducer inner cavity; the first oil duct is provided with an oil suction port and a first oil pumping port; the second oil duct is provided with an oil inlet and a plurality of oil outlets; wherein the cross section of the first oil duct and the cross section of the second oil duct do not intersect with the inner surface or the outer surface, the oil suction port is located at the bottom of an inner cavity of the speed reducer, the oil suction port is formed in the inner surface, the second oil duct is communicated with the bearing chamber through the oil outlet, and the first oil pumping port and the oil inlet are formed in the outer surface. By means of the speed reducer shell, precise control over bearing lubrication is achieved, meanwhile, the number of oil guide components outside a speed reducer is reduced, the dead weight and the production cost of the speed reducer are reduced, oil stirring losses are reduced, and the lubrication efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of reducers, in particular to a reducer housing and a reducer. Background Art

[0002] Reducers are generally used for transmission equipment with large torque. The purpose of reducing speed is achieved by meshing the gear with fewer teeth on the input shaft of the reducer with the large gear on the output shaft. If the friction and wear of the gears and bearings in the gear reducer are not lubricated, it is easy to cause damage to the mechanical equipment. Therefore, the lubrication of the reducer is an important condition to ensure the normal operation of the gears and bearings. Generally, lubricating oil is used to lubricate the gears and bearings. The lubricating oil is directly injected into the reducer. The lubricating oil gathers at the bottom of the reducer and is thrown to the inner wall of the reducer and the bearing chamber as the gear rotates. The lubricating oil slides from the inner wall into the bearing chamber to lubricate the bearing. The lubricating oil cannot play a lubricating role in the process of sliding from the inner wall to the bearing chamber, resulting in oil stirring loss and low efficiency. Another solution is to add an oil guide pipe inside or outside the reducer to transport the lubricating oil to the bearing chamber to lubricate the bearing. Installing an oil guide pipe on the reducer will increase the number of reducer parts, assembly steps and manufacturing costs. Obviously, both existing technologies have certain defects. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, one purpose of the utility model is to propose a reducer housing, which aims to achieve precise lubrication of bearings, reduce the oil guide components of the reducer, reduce manufacturing costs, and improve bearing lubrication efficiency. The reducer housing includes: a body (100), the body (100) includes an inner surface (110) and an outer surface (120), the inner surface (110) defines a reducer inner cavity (101) and a plurality of pairs of bearing chambers (102) arranged opposite to each other, the bearing chambers (102) are accommodated in the reducer inner cavity (101); a first oil passage (130), the first oil passage (130) has an oil suction port (111) and a first pump oil port (121); a second oil passage (140), the second oil passage (140) has an oil inlet port (122) and a plurality of oil outlets; wherein the cross sections of the first oil passage (130) and the second oil passage (140) do not intersect with the inner surface (110) or the outer surface (120), the oil suction port (111) is located at the bottom of the reducer inner cavity (101), the oil suction port (111) is opened on the inner surface (110), the second oil passage (140) is connected to the bearing chamber (102) through the oil outlet, and the first pump oil port (121) and the oil inlet port (122) are opened on the outer surface.

[0005] The utility model provides a reducer housing, which, compared with the prior art which uses splash lubrication or arranges an oil guide pipe outside the reducer housing to supply oil to the reducer bearing, directly opens a lubricating oil channel on the reducer housing body, thereby achieving precise lubrication of the bearings while reducing the number of reducer oil guide components, reducing the manufacturing cost and weight of the reducer, reducing oil stirring losses, and improving bearing lubrication efficiency.

[0006] In addition, the reducer according to the above embodiment of the utility model may also have the following additional technical features.

[0007] Optionally, the second oil passage (140) includes a first fork (140a), from which a first branch (141), a second branch (142) and a third branch (143) are branched, the third branch (143) includes a second fork (143a), from which a fourth branch (144) and a fifth branch (145) are branched, the fifth branch (145) includes a third fork (145a), from which a sixth branch (146) is branched, the first branch (141), the second branch (142), the fourth branch (144) and the sixth branch (146) have respective oil outlets, and a plurality of branches are provided to achieve precise lubrication of a plurality of bearings, which is convenient for implementation.

[0008] Optionally, the main body (100) is divided into a first housing (100a) and a second housing (100b) which are relative to and interconnected with each other; the first oil passage (130), the first branch (141), the second branch (142) and part of the third branch (143) are arranged in the first housing (100a); the rest of the third branch (143) is arranged in the second housing (100b); the reduction housing is divided into two relative housings which are interconnected with each other, so as to facilitate production and assembly.

[0009] Optionally, one of the paired bearing chambers (102) is arranged on the first housing (100a), and the other is arranged on the second housing (100b), and the plurality of bearing chambers (102) include respective side walls (1021) and bottom walls (1022), and the oil outlet is arranged on the side wall (1021) or the bottom wall (1022), and the oil outlet of each branch is arranged on the side wall or the bottom wall of the bearing chamber, so that the lubricating oil can be directly transported to the bearing chamber, thereby realizing precise lubrication of the bearing.

[0010] Optionally, the invention comprises a first bearing chamber (102a) and a second bearing chamber (102b) relative to each other, wherein the first bearing chamber (102a) is defined by a first side wall (1021a) and a first bottom wall (1022a), and the second bearing chamber (102b) is defined by a second side wall (1021b) and a second bottom wall (1022b); a cylinder (1022bb) protrudes upward from the second bottom wall (1022b) at the axis of the second bearing chamber (102b); the cylinder (1022bb) is hollow and defines a third oil passage (150); the fifth branch (145) has a fourth fork (145b); the third oil passage (150) is connected to the fourth fork (145b); and the third oil passage is provided to supply oil to a motor shaft having an oil supply passage extending in the axial direction.

[0011] Optionally, in the extension direction of the second oil channel (140), the fourth fork (145b) is closer to the second fork (143a) than the third fork (145a), and the lubricating oil demand when supplying oil to the motor shaft is greater than the demand of the bearing, so the oil supply demand of the motor is met first.

[0012] Optionally, the reducer housing includes a third bearing chamber (102c), the third bearing chamber (102c) has a third bottom wall (1022c), an oil return port (123) is provided on the outer surface (120), and a first oil outlet (112a) is provided on the third bottom wall (1022c), the oil return port (123) and the first oil outlet (112a) are connected to each other to form a fourth oil channel (160), and the lubricating oil lubricates and cools the motor parts in the motor and then flows back from the fourth oil channel to the reducer inner cavity, and the lubricating oil lubricates and cools the bearings in the third bearing chamber during the process of passing through the third bearing chamber.

[0013] Optionally, the outer surface (120) is provided with a second oil pump port (124), and the second oil pump port (124) is connected with the second oil channel (140) to form a fifth oil channel (170). The fifth oil channel (170) can be provided to transport lubricating oil to the motor, and the lubricating oil circuits of the motor and the reducer are merged together, which is conducive to streamlining the structure and reducing costs.

[0014] Optionally, the first oil channel (130), the second oil channel (140), the third oil channel (150), the fourth oil channel (160) and the fifth oil channel (170) are integrally formed with the reducer housing. The integral forming has high production efficiency and can reduce production costs during mass production. The products produced have high performance and are conducive to simplifying the manufacturing process and improving assembly efficiency. The integral forming technology can achieve efficient force transmission and strengthening of structural parts, and reduce stress concentration.

[0015] Another object of the utility model is to provide a reducer, the reducer comprising an oil pump (200) and an oil cooler (300), and also comprising the above-mentioned reducer housing, the oil pump (200) and the oil cooler (300) comprising respective oil inlets and oil outlets, the oil pump inlet (201) of the oil pump (200) being accommodated at the bottom of the reducer inner cavity (101), the oil pump outlet (202) being connected to the oil suction port (111), the oil cooling inlet (301) of the oil cooler (300) being connected to the first pump oil port (121), and the oil cooling outlet (302) being connected to the oil inlet (122), the oil cooler and the oil pump being arranged to realize the circulation and cooling of the lubricating oil inside the reducer, and in addition, because the above-mentioned reducer housing is adopted, the invention also has the advantages of realizing accurate lubrication of the bearings while reducing the number of oil guide components of the reducer, reducing the manufacturing cost and weight of the reducer, reducing the oil stirring loss, and improving the bearing lubrication efficiency.

[0016] Therefore, according to a reducer housing and reducer provided by the utility model, while achieving precise lubrication of the bearings, the number of reducer oil guide components can be reduced, the manufacturing cost and weight of the reducer can be reduced, the oil stirring loss can be reduced, and the bearing lubrication efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features and advantages of the present invention are described below, which explains the present invention in more detail based on embodiments in conjunction with the accompanying drawings.

[0018] Figure 1 Shown is a schematic diagram of an oil passage of a reducer housing provided according to an embodiment of the utility model.

[0019] Figure 2 Shown is a rear view of a reducer provided according to an embodiment of the utility model.

[0020] Figure 3 Shown is a front view of a reducer provided according to an embodiment of the utility model.

[0021] Figure 4 The AA section view is shown;

[0022] Figure 5 The shown is a BB cross-sectional view;

[0023] Figure 6 Shown is a CC cross-sectional view;

[0024] Figure 7 The shown is a DD cross-sectional view;

[0025] Figure 8 Shown is the EE cross-sectional view;

[0026] Fig. 9 The shown is a FF cross-sectional view;

[0027] Fig.10 Shown is a schematic diagram of the structure of the rear housing;

[0028] Fig.11 Shown is a schematic diagram of the structure of the front housing;

[0029] Fig.12 Shown is a structural schematic diagram of a reducer provided according to the utility model.

[0030] Body-100, front housing (as an example of the first housing)-100a, rear housing (as an example of the second housing)-100b, reducer inner cavity-101, bearing chamber-102, side wall-1021, bottom wall-1022, first side wall-1021a, first bottom wall-1022a, second side wall-1021b, second bottom wall-1022b, cylinder-1022bb, third bottom wall-1022c, input shaft front bearing chamber (as an example of the first bearing chamber)-102a, input shaft rear Bearing chamber (as an example of the second bearing chamber)-102b, intermediate shaft front bearing chamber (as an example of the third bearing chamber)-102c, intermediate shaft rear bearing chamber-102d, output shaft front bearing chamber-102e, output shaft rear bearing chamber-102f, inner surface-110, oil suction port-111, oil outlet-112, input shaft front bearing chamber oil outlet (as an example of the first oil outlet)-112a, input shaft rear bearing chamber oil outlet-112b, intermediate shaft front bearing chamber oil outlet-112c, intermediate shaft rear bearing chamber Oil outlet 112d, output shaft front bearing chamber oil outlet 112e, output shaft rear bearing chamber oil outlet 112f, outer surface 120, first pump oil port 121, oil inlet 122, oil return port 123, second pump oil port 124, first oil passage 130, second oil passage 140, first fork 140a, second fork 143a, third fork 145a, fourth fork 145b, input shaft front bearing chamber branch (as an example of the first branch) 141, output shaft front bearing chamber branch Road (as an example of the second branch) -142, rear housing main oil road (as an example of the third branch) -143, output shaft rear bearing chamber branch (as an example of the fourth branch) -144, rear housing top oil passage (as an example of the fifth branch) -145, rear housing auxiliary oil passage (as an example of the sixth branch) -146, motor shaft oil supply passage (as an example of the third oil passage) -150, motor oil return passage (as an example of the fourth oil passage) -160, motor oil supply passage (as an example of the fifth oil passage) -170;

[0031] Oil pump-200, oil pump oil inlet-201, oil pump oil outlet-202;

[0032] Oil cooler-300, oil cooling inlet-301, oil cooling outlet-302. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are only for the purpose of illustration and are not intended to limit the present invention. Figure 1 In the figure, mutually orthogonal XYZ axes are illustrated for ease of description and direction determination, wherein the positive direction of the X-axis is to the right, the negative direction of the X-axis is to the left, the positive direction of the Y-axis is to the axial forward direction, the negative direction of the Y-axis is to the axial backward direction, the positive direction of the Z-axis is to the upward direction (anti-gravity direction), and the negative direction of the Z-axis is to the downward direction (gravity direction).

[0034] like Figure 1 As shown, a reducer housing comprises: a body 100, the body 100 comprises an inner surface 110 and an outer surface 120, the inner surface 110 defines a reducer inner cavity 101 and a plurality of pairs of bearing chambers 102 arranged opposite to each other, the bearing chambers 102 are accommodated in the reducer inner cavity 101; a first oil passage 130, the first oil passage 130 has an oil suction port 111 and a first pump oil port 121; a second oil passage 140, the second oil passage 140 has an oil inlet 122 and a plurality of oil outlets; wherein the cross sections of the first oil passage 130 and the second oil passage 140 do not intersect with the inner surface 110 or the outer surface 120, that is, they are arranged on the body (not The oil suction port 111 is located at the bottom of the reducer inner cavity 101, and the oil suction port 111 is opened on the inner surface 110. The second oil passage 140 is connected with the bearing chamber 102 through the oil outlet 112. The first oil pump port 121 and the oil inlet 122 are opened on the outer surface 120. The first oil pump port 121 and the oil inlet 122 can be connected through an oil cooler, that is, the oil enters the oil cooler from the first oil pump port 121, and enters the oil passage inside the reducer housing from the oil inlet 122 after being cooled by the oil cooler.

[0035] The utility model provides a reducer housing, in which a channel is opened inside the housing, that is, between the inner surface and the outer surface, for lubricating oil to flow inside. Compared with the splash lubrication and external oil guide pipe lubrication used in the prior art, the lubricating oil can be directly transported from the bottom of the reducer inner cavity to the bearing chamber, eliminating the external oil guide pipe and other related sealing components while achieving active and precise lubrication of the bearings. It can reduce the manufacturing cost of the reducer by reducing parts and components, reduce the weight of the reducer, ensure the reliability of bearing lubrication, reduce bearing friction loss, improve bearing working efficiency, and effectively reduce the oil stirring loss of splash lubrication.

[0036] like Figures 1 to 9 As shown, the second oil passage 140 includes a first fork 140a, from which an input shaft front bearing chamber branch 141, an output shaft front bearing chamber branch 142 and a rear housing main oil passage 143 are branched, the rear housing main oil passage 143 includes a second fork 143a, from which an output shaft rear bearing chamber branch 144 and a rear housing top oil passage 145 are branched, the rear housing top oil passage 145 includes a third fork 145a, from which a rear housing auxiliary oil passage 146 is branched, the input shaft front bearing chamber branch 141, the output shaft front bearing chamber branch 142, the output shaft rear bearing chamber branch 144 and the rear housing auxiliary oil passage 146 have respective oil outlets, at Figure 1 In the figure, the oil passages and oil channels are shown in bold dashed lines.

[0037] In this embodiment, the oil passage extends from the bottom of the reducer housing to the top of the reducer housing, an oil pool is provided at the bottom of the reducer inner cavity, the inner surface and the outer surface simultaneously protrude inward at the bottom of the reducer inner cavity, an oil pump accommodation chamber is formed at the oil pool, the inner surface of the oil pump accommodation chamber is the outer surface of the reducer housing, the oil pump accommodation chamber is connected to the oil pool, and the oil passage is connected to the oil pump accommodation chamber. After the oil passage extends roughly in the horizontal direction at the bottom of the reducer, it extends obliquely upward in the obliquely downward direction of the input shaft front bearing chamber, and after extending axially at the top of the reducer housing, the outer surface is provided with a first pump oil port 121, the first pump oil port 121 is used to connect to an oil cooler, and the lubricating oil sucked from the oil passage flows from the pump oil port into the oil cooler, and after being cooled by the oil cooler, flows into the oil passage through the oil inlet 122.

[0038] The bottom wall of the output shaft rear bearing chamber is closer to the front housing in the axial direction than the bottom wall of the input shaft rear bearing chamber and the bottom wall of the intermediate shaft rear bearing chamber, so the output shaft rear bearing chamber branch is closer to the front housing than the rear housing auxiliary oil circuit.

[0039] The portion of the inner surface corresponding to the rear bearing chamber branch of the output shaft protrudes upward to form a reinforcing rib to enhance the strength of the body.

[0040] The part where the bottom wall and the side wall of the bearing chamber 102 intersect is provided with a plurality of grooves that are concave downwards, and the bottom wall of the bearing chamber is used to intersect with the side of the bearing. The bottom walls of the input shaft rear bearing chamber, the intermediate shaft front / rear bearing chambers, and the output shaft front and rear bearing chambers are all provided with three grooves evenly distributed along the circumferential direction, one of the three grooves is located in the upper center of the bearing chamber, and the other two are located on the lower right and lower left sides respectively. The groove on the lower right side of the input shaft rear bearing chamber, that is, the groove away from the intermediate shaft rear bearing chamber among the two grooves below, continues to extend along the side wall to the edge of the side wall of the input shaft rear bearing chamber after the bottom wall is connected to the side wall. Such a configuration is conducive to the lubricating oil flowing out of the input shaft rear bearing chamber into the bottom of the reducer inner cavity.

[0041] like Figures 1 to 12 As shown, the body 100 is divided into a front housing 100a and a rear housing 100b which are relative and interconnected, the first oil passage 130, the input shaft front bearing chamber branch 141, the output shaft front bearing chamber branch 142 and part of the rear housing main oil passage 143 are arranged in the front housing 100a, and the remaining part of the rear housing main oil passage 143 is arranged in the rear housing 100b, which is divided into two front and rear housings for easy implementation.

[0042] One of the paired bearing chambers 102 is arranged on the front housing 100a, and the other is arranged on the rear housing 100b. The multiple bearing chambers 102 include respective side walls 1021 and / or bottom walls 1022, and the oil outlet is arranged on the side wall 1021 or the bottom wall 1022.

[0043] The reducer housing has an input shaft front bearing chamber 102a, an input shaft rear bearing chamber 102b, an intermediate shaft front bearing chamber 102c, an intermediate shaft rear bearing chamber 102d, an output shaft front bearing chamber 102e, and an output shaft rear bearing chamber 102f. The oil passage includes six branches, wherein the second oil passage 140 extends axially for a distance and then extends downward to branch out into three oil passages, namely, an input shaft front bearing chamber branch 141, an output shaft front bearing chamber branch 142, and a rear housing main oil passage 143. The input shaft front bearing chamber branch 141 extends in the vertical direction and then opens on the first side wall 1021a of the input shaft front bearing chamber to form an input shaft front bearing chamber oil outlet 112a. The output shaft front bearing chamber branch 142 extends in the body for a distance and then branches out into three oil passages. After a certain distance, it reaches the top of the output shaft front bearing chamber 102e, and a channel with a slightly smaller diameter is branched out from the output shaft front bearing chamber 102e branch road, which is connected to the side wall of the output shaft front bearing chamber 102e, forming an output shaft front bearing chamber oil outlet 112e. The rear housing main oil passage 143 extends in the axial direction and branches out an output shaft rear bearing chamber branch road 144 and a rear housing top oil passage 145 at the second fork 143a. The output shaft rear bearing chamber branch road 144 extends in the body for a certain distance and reaches the rear of the output shaft rear bearing chamber 102f. A channel with a slightly smaller diameter is branched out from the output shaft rear bearing chamber branch road 144, which is connected to the bottom wall of the output shaft rear bearing chamber 102f, forming an output shaft rear bearing chamber oil outlet 112f. The rear housing main oil passage 143 further includes a rear housing auxiliary oil passage 146 at the second fork 143a. The rear housing auxiliary oil passage 146 includes two mutually intersecting passages in an "X" shape. The top of one of the oblique lines of the "X"-shaped oil passage is connected to the rear housing top oil passage, such as Figure 1 and Figure 6 As shown, the portions of the rear housing auxiliary oil passage 146 located behind the input shaft rear bearing chamber 102b and the intermediate shaft rear bearing chamber 102d each extend outwardly through a passage with a slightly smaller diameter to connect to the input shaft rear bearing chamber 102b and the intermediate shaft rear bearing chamber 102d.

[0044] like Figure 1 and Figure 4As shown, the reducer housing includes a relative input shaft front bearing chamber 102a and an input shaft rear bearing chamber 102b, the input shaft front bearing chamber 102a is defined by a first side wall 1021a and a first bottom wall 1022a, the input shaft rear bearing chamber 102b is defined by a second side wall 1021b and a second bottom wall 1022b, the input shaft rear bearing chamber 102b protrudes upward from the second bottom wall 1022b at the axis center to form a cylinder 1022bb, the cylinder 1022bb is hollow and defines a motor shaft oil supply channel 150, and an upwardly protruding boss is also provided at the bottom of the cylinder 1022bb, the top oil passage 145 of the rear housing has a fourth fork 145b, and the motor shaft oil supply channel 150 is connected to the fourth fork 145b. The input shaft extends from the front housing into the inner cavity of the reducer, with one end supported on the input shaft rear bearing and the other end supported on the input shaft front bearing. The end face of the input shaft is opposite to the bottom wall of the input shaft rear bearing chamber and an oil passage extending axially along the input shaft is provided on the end face. The cylinder 1022bb is accommodated in the oil passage of the input shaft to realize oil supply to the input shaft. In some implementations, the input shaft and the motor stator connected to the input shaft have an axial hollow structure, and the cylinder can be accommodated in the axial hollow structure of the input shaft.

[0045] like Figure 1 and Figure 4 As shown, in the extension direction of the second oil passage 140, the fourth fork 145b is closer to the second fork 143a than the third fork 145a, and the motor has a greater demand for lubricating oil. Oil is supplied to the input shaft before the lubricating oil enters the auxiliary oil passage of the rear housing, which helps to meet the lubrication needs of the motor.

[0046] like Figure 1 and Fig. 9 As shown, the reducer housing includes an intermediate shaft front bearing chamber 102c, the intermediate shaft front bearing chamber 102c has a third bottom wall 1022c, an oil return port 123 is provided on the outer surface 120, an oil outlet 112c is provided on the third bottom wall 1022c, the oil return port 123 and the output shaft rear bearing chamber oil outlet 112f are mutually connected to form a motor oil return channel 160. After the lubricating oil is lubricated and cooled in the motor, it returns to the reducer inner cavity from the motor oil return channel, completing a motor lubrication cycle and also lubricating and cooling the intermediate shaft front bearing. The outer surface 120 is provided with a second oil pump port 124, and the second oil pump port 124 is connected with the second oil channel 140 to form a motor oil supply channel 170.

[0047] The first oil passage 130, the second oil passage 140, the motor shaft oil supply passage 150 and the motor oil return passage 160 are integrally formed with the reducer housing. The integral forming has high production efficiency, can reduce production costs during mass production, and the products produced have high performance, which is conducive to simplifying the manufacturing process and improving assembly efficiency. The integral forming technology can achieve efficient force transmission and strengthening of structural parts, and reduce stress concentration.

[0048] like Figures 1 to 9 and Fig.12 As shown, another object of the utility model is to provide a reducer, including the above-mentioned reducer housing, the reducer also including an oil pump 200 and an oil cooler 300, the oil pump 200 and the oil cooler 300 include respective oil inlets and oil outlets, the oil pump inlet 201 of the oil pump 200 is accommodated at the bottom of the reducer inner cavity 101, the oil pump outlet 202 is connected to the oil suction port 111, the oil cooling inlet 301 of the oil cooler 300 is connected to the first pump oil port 121, and the oil cooling outlet 302 is connected to the oil inlet 122, so that the oil pump draws lubricating oil from the reducer inner cavity and transports it to each bearing chamber inside the reducer after cooling by the oil cooler, so as to effectively lubricate the bearings and other components.

[0049] Because the reducer provided by the utility model uses the above-mentioned reducer housing, it also has the following advantages: it can eliminate the external oil guide pipe and other related sealing components while achieving active and precise lubrication of the bearings, which can reduce the manufacturing cost of the reducer by reducing parts and components and reduce the weight of the reducer, while ensuring the reliability of bearing lubrication, reducing bearing friction losses, improving bearing working efficiency, and effectively reducing oil stirring losses caused by splash lubrication.

[0050] The oil pump and oil cooler involved in the utility model are both commercially available and can meet the use requirements, and no specific model is required.

[0051] The following describes the process of using a reducer housing and a reducer provided by the utility model to achieve precise lubrication of the internal bearings of the reducer:

[0052] The lubricating oil gathers at the bottom of the reducer inner cavity. The oil pump draws the lubricating oil from the bottom of the reducer inner cavity and transports it to the oil channel. The outlet of the oil channel is connected to the oil cooler. After being cooled by the oil cooler, the oil enters the oil channel and is transported from the oil outlet of the input shaft front bearing to the input shaft front bearing chamber, enters the output shaft front bearing chamber through the oil outlet of the output shaft front bearing chamber, flows to the rear housing through the main oil channel of the rear housing, and branches at the second fork 143a. One path flows into the output shaft rear bearing chamber from the output shaft rear bearing chamber branch, and the other path flows into the input shaft rear bearing chamber and the intermediate shaft rear shaft from the two oil outlets of the rear housing auxiliary oil channel. In the bearing chamber, a motor shaft oil supply channel is arranged in the bearing chamber behind the input shaft. After the lubricating oil flows from the input shaft into the stator, it can play a certain lubricating and cooling role on the motor stator. A motor oil supply channel connected with the oil channel is also arranged on the main body. The motor oil supply channel is connected with the inside of the motor. The lubricating oil is transported to the inside of the motor through the cylinder 1022bb and the motor oil supply channel, and then flows into the bottom of the motor after completing the lubrication and cooling operation. After passing through the motor return oil channel, it flows into the inner cavity of the reducer. At the same time, it can also lubricate the front bearing of the intermediate shaft. At this point, all six bearings in the reducer are accurately lubricated.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0057] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A reducer housing, characterized in that: include: A body (100), the body (100) comprising an inner surface (110) and an outer surface (120), the inner surface (110) defining a reducer inner cavity (101) and a plurality of pairs of bearing chambers (102) arranged opposite to each other, the bearing chambers (102) being accommodated in the reducer inner cavity (101); A first oil passage (130), wherein the first oil passage (130) has an oil suction port (111) and a first oil pump port (121); A second oil passage (140), the second oil passage (140) having an oil inlet (122) and a plurality of oil outlets; The cross sections of the first oil passage (130) and the second oil passage (140) do not intersect with the inner surface (110) or the outer surface (120); the oil suction port (111) is located at the bottom of the reducer inner cavity (101); the oil suction port (111) is opened on the inner surface (110); the second oil passage (140) is connected to the bearing chamber (102) through the oil outlet; and the first pump oil port (121) and the oil inlet port (122) are opened on the outer surface.

2. The reducer housing according to claim 1, characterized in that: The second oil passage (140) comprises a first fork (140a), from which a first branch (141), a second branch (142) and a third branch (143) are branched; the third branch (143) comprises a second fork (143a), from which a fourth branch (144) and a fifth branch (145) are branched; the fifth branch (145) comprises a third fork (145a), from which a sixth branch (146) is branched; the first branch (141), the second branch (142), the fourth branch (144) and the sixth branch (146) have respective oil outlets.

3. The reducer housing according to claim 2, characterized in that: The main body (100) is divided into a first box body (100a) and a second box body (100b) which are opposite to and connected to each other; the first oil passage (130), the first branch (141), the second branch (142) and part of the third branch (143) are arranged in the first box body (100a), and the remaining part of the third branch (143) is arranged in the second box body (100b).

4. The reducer housing according to claim 3, characterized in that: One of the paired bearing chambers (102) is arranged on the first housing (100a), and the other is arranged on the second housing (100b); the plurality of bearing chambers (102) include respective side walls (1021) and bottom walls (1022); and the oil outlet is arranged on the side wall (1021) or the bottom wall (1022).

5. The reducer housing according to claim 4, characterized in that: The invention comprises a first bearing chamber (102a) and a second bearing chamber (102b) opposite to each other, wherein the first bearing chamber (102a) is defined by a first side wall (1021a) and a first bottom wall (1022a), and the second bearing chamber (102b) is defined by a second side wall (1021b) and a second bottom wall (1022b). A cylinder (1022bb) protrudes upward from the second bottom wall (1022b) at the axis of the second bearing chamber (102b), and the cylinder (1022bb) is hollow and defines a third oil passage (150). The fifth branch (145) has a fourth fork (145b), and the third oil passage (150) is connected to the fourth fork (145b).

6. The reducer housing according to claim 5, characterized in that: In the extending direction of the second oil passage (140), the fourth fork (145b) is closer to the second fork (143a) than the third fork (145a).

7. The reducer housing according to claim 5, characterized in that: The reducer housing comprises a third bearing chamber (102c), the third bearing chamber (102c) has a third bottom wall (1022c), an oil return port (123) is provided on the outer surface (120), a first oil outlet (112a) is provided on the third bottom wall (1022c), and the oil return port (123) and the first oil outlet (112a) are connected to each other to form a fourth oil passage (160).

8. The reducer housing according to claim 7, characterized in that: The outer surface (120) is provided with a second oil pump port (124), and the second oil pump port (124) is connected to the second oil passage (140) to form a fifth oil passage (170).

9. The reducer housing according to claim 8, characterized in that: The first oil passage (130), the second oil passage (140), the third oil passage (150), the fourth oil passage (160) and the fifth oil passage (170) are integrally formed with the reducer housing.

10. A speed reducer, comprising an oil pump (200) and an oil cooler (300), characterized in that: It also includes the reducer housing according to any one of claims 1 to 9, the oil pump (200) and the oil cooler (300) include respective oil inlets and oil outlets, the oil pump inlet (201) of the oil pump (200) is accommodated at the bottom of the reducer inner cavity (101), the oil pump outlet (202) is connected to the oil suction port (111), the oil cooling inlet (301) of the oil cooler (300) is connected to the first pump oil port (121), and the oil cooling outlet (302) is connected to the oil inlet (122).

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