Shell structure suitable for gear transmission box and gear transmission box

Abstract

The utility model relates to the technical field of transmission equipment, and discloses a shell structure suitable for a gear transmission box and the gear transmission box. The shell structure comprises a shell body, the shell body is provided with a containing cavity, the cavity bottom of the containing cavity is provided with an oil collecting structure, a first bearing groove, a second bearing groove and an oil storage groove, the oil collecting structure and the shell body form an oil collecting groove, a first oil guide groove is formed between the oil collecting groove and the first bearing groove, and a second oil guide groove is formed between the first bearing groove and the second bearing groove. A third oil guide groove is formed between the second bearing groove and the oil storage groove, and the second oil guide groove and the third oil guide groove extend in the first direction; an oil drainage hole communicated with the oil storage groove is formed in the peripheral side wall of the shell body, the axis of the oil drainage hole is located in the second direction, and the included angle formed by the second direction and the first direction is an acute angle. According to the shell structure, the lubricating effect of the bearing is improved, and the service life is prolonged.

Description

Technical Field

[0001] This application belongs to the technical field of transmission equipment, and specifically relates to a housing structure applicable to a gear transmission box and a gear transmission box. Background Art

[0002] The lubrication methods of gears include active lubrication with an external lubrication system and passive lubrication by splashing. In existing gear speed increasers, for cost considerations, the lubrication method of splashing is usually adopted, mainly by driving the lubricating oil in the housing to splash through the high-speed rotation of the gears.

[0003] Specifically, in a gear speed increaser, an oil baffle, an oil collecting plate, an oil inlet channel, and a communicating oil channel are arranged on the housing. The oil baffle and the oil collecting plate collect the splashed lubricating oil generated by the rotation of the gears, and the lubricating oil lubricates the upper bearing and the lower bearing arranged in the upper bearing seat and the lower bearing seat through the oil inlet channel and the communicating oil channel.

[0004] However, most of the oil channels opened on the housing are through-hole structures, and the oil channel design is unreasonable. After the lubricating oil enters the chamber where the lower bearing is located, it will directly flow out through the oil port at the bottom, resulting in no oil storage function in the chamber where the lower bearing is located, and thus it is easy to have poor bearing lubrication, leading to a shortened bearing life. Summary of the Utility Model

[0005] The purpose of this application is to provide a housing structure applicable to a gear transmission box and a gear transmission box, which are used to solve the problem of short bearing life caused by poor bearing lubrication in the prior art.

[0006] To achieve the above purpose, on the one hand, this application provides a housing structure applicable to a gear transmission box, including a housing body. The housing body is recessed inward to form a receiving cavity for receiving a gear transmission mechanism. An oil collecting structure, a first bearing groove, a second bearing groove, and an oil storage groove are arranged at the bottom of the receiving cavity. The oil collecting structure and the peripheral side of the housing body surround to form an oil collecting groove. A first oil guiding groove is arranged between the oil collecting groove and the first bearing groove. A second oil guiding groove is arranged between the first bearing groove and the second bearing groove. A third oil guiding groove is arranged between the second bearing groove and the oil storage groove. The second oil guiding groove and the third oil guiding groove both extend along a first direction;

[0007] Wherein, the vertical direction of the housing body when the gear transmission box is in normal use is defined as a second direction. The second direction intersects with the first direction and forms an acute angle.

[0008] As a further improvement of the above technical solution:

[0009] In some embodiments, the oil collecting structure includes a first oil baffle and a second oil baffle, both the first oil baffle and the second oil baffle are disposed on the bottom of the cavity and connected to the peripheral side wall of the housing body;

[0010] Wherein, the first oil baffle, the second oil baffle and the peripheral side wall of the housing body jointly enclose to form the oil collecting groove, and the first oil guiding groove is disposed between the first oil baffle and the second oil baffle.

[0011] In some embodiments, the first oil baffle includes an oil guiding portion and an oil blocking portion, the oil guiding portion is disposed on the bottom of the receiving cavity, and the oil blocking portion is disposed at one end of the oil guiding portion and connected to the peripheral side wall of the housing body;

[0012] Wherein, a notch for the lubricating oil to enter and exit is formed between the oil guiding portion and the peripheral side wall of the housing body, and the second oil baffle is arranged corresponding to the notch.

[0013] In some embodiments, the oil blocking portion has an arc-shaped structure, the oil blocking portion has an inner arc side and an opposite outer arc side, wherein, the inner arc side faces the first bearing groove, and the outer arc side faces the peripheral side wall of the housing body.

[0014] In some embodiments, air vent holes are provided on the peripheral side wall of the housing body, and the air vent holes correspond to and communicate with the oil collecting groove;

[0015] Wherein, a flare fitting is further provided on the housing body, and the flare fitting is located at the air vent hole.

[0016] In some embodiments, along a third direction, a first shaft hole is provided on the housing body corresponding to the first bearing groove and / or the second bearing groove;

[0017] The housing structure applicable to the gear transmission box further includes an end cover disposed on the housing body, the end cover is located in the corresponding first shaft hole and is in sealing cooperation with the hole wall of the first shaft hole;

[0018] Wherein, the third direction is perpendicular to the first direction and the second direction respectively, and the first direction and the second direction are in the same plane.

[0019] In some embodiments, an oil inlet groove opening and an oil outlet groove opening are provided at the end of the end cover facing the housing body along the first direction, and / or, a static sealing structure is provided between the hole wall of the first shaft hole and the end cover.

[0020] In some embodiments, a second shaft hole is provided on the end cover, a sealing groove is provided on the hole wall of the second shaft hole, and a dynamic sealing structure is installed in the sealing groove.

[0021] In some embodiments, a flow guiding plate is further provided on the circumferential side wall of the housing body. Along the second direction, the flow guiding plate is located above the first bearing groove. The flow guiding plate is used to collect the splashed lubricating oil and converge it, so that the converged lubricating oil drips between the axes of the first bearing groove and the second bearing groove along the second direction.

[0022] The second aspect of the present application further provides a gear transmission box, including a first housing structure, a second housing structure and a gear transmission mechanism. The first housing structure and the second housing structure are arranged opposite to each other and detachably connected. The gear transmission mechanism is arranged between the first housing structure and the second housing structure.

[0023] Wherein, the first housing structure and / or the second housing structure adopt the housing structure applicable to the gear transmission box provided in the above first aspect.

[0024] During use, define the static oil level height of the lubricating oil in the gear transmission box as H2, and the dynamic oil level height as H1, and satisfy H2=(2.5 - 3.5)*H1.

[0025] Compared with the prior art, the present application provides a housing structure applicable to a gear transmission box and a gear transmission box. Among them, for the housing structure applicable to the gear transmission box, the gear transmission mechanism of the gear transmission box is accommodated in the accommodation cavity in the housing body; when the gear transmission box is in use, the vertical direction is defined as the second direction; and in the use state, a certain amount of lubricating oil can be stored in the oil storage tank. When the gear transmission mechanism runs at high speed, the lubricating oil will be driven to splash onto the circumferential side wall of the housing body, and under the action of the oil collecting structure, the splashed lubricating oil will be converged into the oil collecting tank, and then enter the first bearing groove through the first oil guiding groove for lubrication, and then enter the second bearing groove through the second oil guiding groove for lubrication, and finally flow back to the oil storage tank through the third oil guiding groove. Since both the second oil guiding groove and the third oil guiding groove extend along the first direction, and the second direction intersects with the first direction and the formed included angle is an acute angle, the extending directions of the second oil guiding groove and the third oil guiding groove are arranged obliquely towards the oil storage tank. That is to say, when the housing body is in the normal use state, the second oil guiding groove and the third oil guiding groove are not at the bottommost of the first bearing groove and the second bearing groove. Thus, part of the lubricating oil in the oil collecting tank will be stored in the first bearing groove after entering the first bearing groove. After the lubricating oil level reaches a certain height, it will overflow to the second bearing groove through the second flow guiding groove. The second bearing groove can also store part of the lubricating oil, and after the lubricating oil level reaches a certain height, it will overflow to the oil storage tank through the third flow guiding groove.

[0026] It can be seen from this that during the use of the housing structure applicable to the gear transmission box provided in this application, it can ensure that there is lubricating oil in the first bearing groove and the second bearing groove, so that the bearing always has sufficient lubricating oil for lubrication and cooling, improving the lubrication effect of the bearing and extending the service life.

[0027] Other features and advantages of the embodiments of this application will be described in detail in the subsequent specific embodiment part. Brief Description of the Drawings

[0028] The drawings are used to provide a further understanding of the embodiments of this application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of this application, but do not constitute a limitation to the embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings. In the drawings:

[0029] Figure 1 It is a schematic structural diagram of a gear transmission box provided by an embodiment of this application placed in the use state;

[0030] Figure 2 It is a three-dimensional structural diagram of a housing structure of a gear transmission box provided by an embodiment of this application;

[0031] Figure 3 is Figure 1 A schematic structural diagram of the gear transmission box shown after removing a housing structure, indicating the splashing and flowing directions of the lubricating oil and showing the height of the dynamic oil level as H1 and the height of the static oil level as H2;

[0032] Figure 4 is Figure 3 A partial enlarged view at position B in;

[0033] Figure 5 is Figure 1 A rotating sectional view in the A-A direction of the gear transmission box shown after removing a housing structure;

[0034] Figure 6 Figure 1 A partial structural sectional view in the A-A direction in;

[0035] Figure 7 It is a three-dimensional structural diagram of an end cover applied to the housing structure provided by an embodiment of this application.

[0036] Description of the Reference Numerals

[0037] 100, housing structure; 100a, first housing structure; 100b, second housing structure; 110, housing body; 110a, receiving cavity; 110b, oil drain hole; 110c, oil filling hole; 110d, oil level gauge hole; 110e, breather hole; 111, first bearing groove; 112, second bearing groove; 113, oil storage groove; 114, first oil guiding groove; 115, second oil guiding groove; 116, third oil guiding groove; 120, oil collecting structure; 120a, oil collecting groove; 121, first oil baffle; 1210, oil guiding part; 1211, oil blocking part; 122, second oil baffle; 130, taper adapter; 140, deflector; 150, end cover; 151, oil inlet groove; 152, oil outlet groove; 153, second shaft hole; 160, static sealing structure; 170, dynamic sealing structure;

[0038] 200, gear transmission mechanism;

[0039] 300, input shaft;

[0040] 400, output shaft;

[0041] X1, first direction; X2, second direction; X3, third direction. Detailed implementation manners

[0042] The following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for explaining and understanding the present application, and are not used to limit the present application.

[0043] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0044] Please refer to Figure 1 , Figure 2 and Figure 3 , this embodiment provides a housing structure 100 applicable to a gear transmission box, hereinafter collectively referred to as the housing structure 100. Among them, the gear transmission box includes a gear transmission mechanism 200.

[0045] The housing structure 100 includes a housing body 110. The housing body 110 is recessed inwardly to form a receiving cavity 110a for receiving the gear transmission mechanism 200. The bottom of the receiving cavity 110a is provided with an oil collecting structure 120, a first bearing groove 111, a second bearing groove 112 and an oil storage groove 113. The oil collecting structure 120 and the peripheral side of the housing body 110 surround to form an oil collecting groove 120a. A first oil guiding groove 114 is provided between the oil collecting groove 120a and the first bearing groove 111. A second oil guiding groove 115 is provided between the first bearing groove 111 and the second bearing groove 112. A third oil guiding groove 116 is provided between the second bearing groove 112 and the oil storage groove 113. Both the second oil guiding groove 115 and the third oil guiding groove 116 extend along the first direction X1.

[0046] Wherein, the vertical direction of the housing body 110 when the gear transmission box is in a normal use state is defined as the second direction X2, and the included angle formed by the intersection of the second direction X2 and the first direction X1 is an acute angle.

[0047] Furthermore, an oil drain hole 110b communicating with the oil storage tank 113 is provided on the circumferential side wall of the housing body 110. The oil drain hole 110b is located at the lowest position of the housing body 110 in the normal use state and the axis of the oil drain hole 110b is located in the second direction X2, so as to facilitate the emptying of the lubricating oil in the oil storage tank 113.

[0048] In some embodiments, an oil filling hole 110c for filling lubricating oil and an oil level gauge hole 110d for observing the lubricating oil level are further provided on the housing body 110. In the use state, the oil filling hole 110c is blocked by a plug, and the oil level gauge hole 110d is provided with a sealed window.

[0049] Please refer to Figure 3 and Figure 5 , it can be understood that when the housing structure 100 is applied to the gear transmission box, the gear transmission mechanism 200 of the gear transmission box is received in the receiving cavity 110a in the housing body 110. And in the use state, the oil drain hole 110b is located at the lowest position of the circumferential side wall of the housing body 110, so as to facilitate the discharge of the stored lubricating oil in the oil storage tank 113, and the axis of the oil drain hole 110b is defined to be located in the second direction X2 (as Figure 1As shown, when the gear transmission case is in normal use, the second direction X2 is vertically upward. During use, the oil storage tank 113 can store a certain amount of lubricating oil. When the gear transmission mechanism 200 is running at high speed, the lubricating oil will be driven to splash onto the peripheral side wall of the housing body 110, and under the action of the oil collecting structure 120, the splashed lubricating oil will be collected into the oil collecting tank 120a, and then enter the first bearing groove 111 through the first oil guiding groove 114 for lubrication, and then enter the second bearing groove 112 through the second oil guiding groove 115 for lubrication, and finally flow back to the oil storage tank 113 through the third oil guiding groove 116. In this embodiment, since both the second oil guiding groove 115 and the third oil guiding groove 116 extend along the first direction X1, and the second direction X2 intersects with the first direction X1 and the included angle formed is an acute angle, the extending directions of the second oil guiding groove 115 and the third oil guiding groove 116 are arranged obliquely towards the oil storage tank 113. That is to say, when the housing body 110 is in the normal use state, neither the second oil guiding groove 115 nor the third oil guiding groove 116 is at the bottommost of the first bearing groove 111 and the second bearing groove 112. Thus, a part of the lubricating oil in the oil collecting tank 120a will be stored in the first bearing groove 111 after entering the first bearing groove 111, and after the lubricating oil level reaches a certain height, it will overflow to the second bearing groove 112 through the second diversion groove. The second bearing groove 112 can also store a part of the lubricating oil, and after the lubricating oil level reaches a certain height, it will overflow to the oil storage tank 113 through the third diversion groove.

[0050] It can be seen from this that during the use of the housing structure 100 provided in this embodiment in the gear transmission case, it can ensure that there is enough lubricating oil in the first bearing groove 111 and the second bearing groove 112, so that the bearing always has enough lubricating oil for lubrication and cooling, improving the lubrication effect of the bearing and extending the service life.

[0051] In order to more clearly describe the technical solution of the present application, the housing structure 100 provided in this embodiment will be described in detail below, as follows:

[0052] Please refer to Figure 2 、 Figure 3 and Figure 4 As shown in the above, the oil collecting structure 120 includes a first oil baffle 121 and a second oil baffle 122. Both the first oil baffle 121 and the second oil baffle 122 are arranged on the cavity bottom and connected to the peripheral side wall of the housing body 110. Among them, the first oil baffle 121, the second oil baffle 122 and the peripheral side wall of the housing body 110 jointly surround to form the oil collecting tank 120a, and the first oil guiding groove 114 is arranged between the first oil baffle 121 and the second oil baffle 122.

[0053] It can be understood that in this embodiment, the shape of the oil collecting tank 120a is designed as a sector, and the range of the sector angle is 50° to 85°, preferably 70°. In this way, while ensuring sufficient oil collection, it can also ensure that the lubricating oil flows out of the oil collecting tank 120a quickly.

[0054] The first oil baffle 121 includes an oil guiding part 1210 and an oil blocking part 1211. The oil guiding part 1210 is arranged on the bottom of the accommodating cavity 110a. The oil blocking part 1211 is arranged at one end of the oil guiding part 1210 and is connected to the peripheral side wall of the housing body 110.

[0055] Furthermore, the oil guiding part 1210 has an arc-shaped structure. The oil blocking part 1211 has an inner arc side and an opposite outer arc side. Among them, the inner arc side faces the first bearing groove 111, and the outer arc side faces the peripheral side wall of the housing body 110. In this way, an arc-shaped avoidance structure can be constructed on the inner arc side to avoid the gears in the gear transmission mechanism 200. It can also be understood that when the inner wall surface of the peripheral side wall of the housing body 110 is also arc-shaped, the oil collecting tank 120a formed by the oil guiding part 1210, the oil blocking part 1211 and the housing body 110 is in the shape of a sector ring, improving the oil collection effect.

[0056] Optionally, the sector angle of the oil collecting tank 120a can be selected from 50° to 78°, preferably 70°. In this way, the oil collection space is large, more splashed oil can be received, and at the same time, the outflow speed is ensured to be fast, making the bearing lubrication and cooling more sufficient.

[0057] In some embodiments, the oil guiding part 1210 can also adopt a straight plate structure and be arranged to avoid the active area of the gears to prevent interference.

[0058] It should be noted that the arrangement position of the first oil baffle 121 should consider the splashing direction of the lubricating oil driven by the gears, that is to say, the first oil baffle 121 is located in the splashing direction of the lubricating oil to improve the oil blocking effect.

[0059] Among them, a notch for the lubricating oil to enter and exit is formed between the oil guiding part 1210 and the peripheral side wall of the housing body 110. The second oil baffle 122 is arranged corresponding to the notch, and the first oil guiding groove 114 is arranged at the notch to facilitate guiding the collected lubricating oil into the first bearing groove 111. In this embodiment, on the one hand, the second oil baffle 122 blocks oil at the notch, and on the other hand, it can also act as a reinforcing rib of the housing body 110 to enhance the structural strength of the housing body 110.

[0060] Please refer to Figure 2 、 Figure 3 and Figure 4 , a ventilation hole 110e is provided on the peripheral side wall of the housing body 110, and the ventilation hole 110e corresponds to and communicates with the oil collecting tank 120a; among them, a tower joint 130 is also provided on the housing body 110, and the tower joint 130 is located at the ventilation hole 110e.

[0061] It is understandable that the function of the air hole 110e is to maintain the same pressure inside and outside the gear transmission box. And the first oil baffle 121 not only guides the oil, but also prevents the splashing lubricating oil from splashing directly to the air hole 110e. The air hole 110e is arranged with a pagoda joint 130, and a clamp and an air pipe are used on the outside to ensure that the internal pressure of the box is consistent with the atmospheric pressure. At the same time, the oil and gas inside the gear transmission box rise into the air pipe, condense into oil droplets, and flow back to the gear transmission box by gravity.

[0062] See also Figure 2 , Figure 3 and Figure 4 , further, the thickness direction of the shell body 110 is defined as a third direction X3, the third direction X3 is perpendicular to the first direction X1 and the second direction X2, respectively, and the first direction X1 and the second direction X2 are located in the same plane. Among them, along the third direction X3, a first axial hole (not shown) is provided on the shell body 110 corresponding to the first bearing groove 111 and / or the second bearing groove 112. That is to say, in some embodiments, the first bearing groove 111 or the second bearing groove 112 is provided with a first axial hole. In this embodiment, an example is taken as an example that both the first bearing groove 111 and the second bearing groove 112 are provided with a first axial hole.

[0063] The housing structure 100 further includes an end cover 150 disposed on the housing body 110. The end cover 150 is located in the corresponding first axial hole and is sealed with the hole wall of the first axial hole. The number of the end covers 150 is the same as the number of the first axial holes.

[0064] Please also read Figure 6 and Figure 7 , the end of the end cover 150 facing the shell body 110 is provided with an oil inlet slot 151 and an oil outlet slot 152 along the first direction X1. When the end cover 150 is installed in the first bearing groove 111, the oil inlet slot 151 is aligned with the first oil guide groove 114, and the oil outlet slot 152 is aligned with the second oil guide groove 115; when the end cover 150 is installed in the second bearing groove 112, the oil inlet slot 151 is aligned with the second oil guide groove 115, and the oil outlet slot 152 is aligned with the third oil guide groove 116. In this way, the obstruction of the end cover 150 to the flow of lubricating oil can be reduced, ensuring that the lubricating oil flows smoothly in the first oil guide groove 114, the second oil guide groove 115 and the third oil guide groove 116, rather than relying solely on the roller clearance of the bearings in the first bearing groove 111 and the second bearing groove 112 to enter and flow out, fully ensuring the lubrication and heat dissipation effects of the bearings.

[0065] In some embodiments, a static seal structure 160 is provided between the hole wall of the first shaft hole and the end cover 150. Specifically, an O-ring or a T-ring can be provided between the hole wall of the first shaft hole and the end cover 150. Of course, a static seal form of applying a planar sealant to the joint surface of the end cover 150 can also be used to achieve the seal of the end cover 150.

[0066] In some embodiments, a second shaft hole 153 is provided on the end cover 150, a seal groove is provided on the hole wall of the second shaft hole 153, a dynamic seal structure 170 is installed in the seal groove, the second shaft hole 153 can be used for the input shaft 300 or the output shaft 400 in the gear transmission box to extend out, and the dynamic seal structure 170 is used to achieve the seal between the input shaft 300 or the output shaft 400 and the corresponding end cover 150, and isolate lubricating oil and dust. Among them, the dynamic seal structure 170 can be selected as a skeleton oil seal, preferably a double-lip skeleton oil seal.

[0067] In some embodiments, a V-ring seal, a labyrinth seal, a single-row single-lip skeleton oil seal, a double-row lip seal, etc. can also be provided between the second shaft hole 153 and the input shaft 300 or the output shaft 400.

[0068] Optionally, the skeleton oil seal is made of fluororubber material, and other seal materials such as non-fluororubber can also be used, such as nitrile rubber, polytetrafluoroethylene and other materials.

[0069] Please refer to Figure 2 and Figure 3 , further, in this embodiment, a deflector 140 is further provided on the peripheral side wall of the housing body 110. Along the second direction X2, the deflector 140 is located above the first bearing groove 111. The deflector 140 is used to collect the splashed lubricating oil and gather it, so that the gathered lubricating oil drips along the second direction X2 between the axes of the first bearing groove 111 and the second bearing groove 112. In this way, the dripping lubricating oil droplets can fall to the meshing position of the gears in the gear transmission mechanism 200 to lubricate and cool the meshing position of the gears, and extend the service life of the gears. Moreover, the deflector 140 can also be equivalent to a reinforcing rib of the housing body 110 to enhance the structural strength of the housing body 110.

[0070] Please refer to Figures 1 to 7 , this embodiment also provides a gear transmission box. The gear transmission box includes a first housing structure 100a, a second housing structure 100b and a gear transmission mechanism 200. The first housing structure 100a and the second housing structure 100b are arranged in opposition and detachably connected, and the gear transmission mechanism 200 is arranged between the first housing structure 100a and the second housing structure 100b. Among them, the first housing structure 100a and / or the second housing structure 100b adopt the housing structure 100 applicable to the gear transmission box provided in the above embodiment.

[0071] Optionally, the gear transmission box can be a speed increasing box for the hybrid wheat machine generator or a speed reducing box, etc.

[0072] Please refer to Figure 3 , it should be noted that lubricating oil needs to be filled in advance before the gear transmission box is used. The static oil level height of the lubricating oil in the gear transmission box is defined as H2, and the dynamic oil level height during the normal operation of the gear transmission box is H1. H2 = (2.5 - 3.5) * H1 to ensure better lubrication effect inside the gear transmission box. And at the dynamic oil level, ensure that the lubricating oil can submerge the tooth roots of the gears located in the oil storage tank 113. Optionally, H2 = 3 * H1.

[0073] Compared with the prior art, the housing structure 100 provided in this embodiment has the following advantages:

[0074] (1) In the existing solutions mentioned in the background art, the oil inlet channel and the connecting oil channel on the housing are both hole structures, so a core mold needs to be used when casting the oil channel, increasing the casting complexity and the scrap rate. In this application, the oil groove does not require a core mold and can be directly demolded up and down, with simple casting, low scrap rate, and significantly reduced casting cost.

[0075] (2) The existing solutions do not consider oil blocking at the position of the vent hole 110e. In this application, the vent hole 110e is arranged corresponding to the oil collecting structure 120 and has a first oil baffle 121 for oil blocking. While strengthening the strength of the housing body 110, the oil collecting structure 120 ensures that the splashed lubricating oil will not directly splash onto the vent hole 110e, avoiding direct leakage of the lubricating oil from the vent hole 110e.

[0076] (3) The existing solutions do not consider the lubrication and cooling at the gear meshing position. In this application, a deflector 140 is provided. While strengthening the strength of the housing body 110, the oil droplets condensed on the housing body 110 will also flow along the deflector 140 into the gear meshing position.

[0077] (4) In the existing solutions, the oil receiving plate is used as the oil collecting tank 120a, with a small oil collecting space. In this application, a first oil baffle 121, a second oil baffle 122, and the inner peripheral wall of the housing body 110 form the oil collecting tank 120a. The oil collecting tank 120a is designed as a fan-shaped ring, and the fan angle can be selected from 50° to 78°, preferably 70°. The oil collecting space is large, and more splashed oil can be received. At the same time, the outflow speed is fast, making the bearing lubrication and cooling more sufficient.

[0078] (5) Compared with the existing solutions where the outlet oil circuit structure of the lower bearing is at the bottom of the bearing, in this application, both the second oil guiding groove 115 and the third oil guiding groove 116 are arranged at an oblique angle, which not only meets the needs of bearing lubrication and cooling but also enables the bearing to be in an oil lubrication state at all times.

[0079] (6) In this application, an oil inlet groove 151 and an oil outlet groove 152 are designed on the end cover 150, making the lubricating oil enter and exit the first bearing groove 111 and the second bearing groove 112 more smoothly, rather than only entering and exiting through the rotating bearing rollers, which fully ensures the lubrication and heat dissipation of the bearing.

[0080] (7) In this application, a form combining static seal and dynamic seal is adopted on the end cover 150. The static seal uses an O-ring and applies planar sealant, and the dynamic seal uses a skeleton oil seal, with a simple structure, low cost, and high reliability.

[0081] It should be noted that in this application, unless otherwise stated, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0082] The gear transmission mechanism 200 is formed by the meshing of gears with each other. The gear transmission mechanism 200 and the pagoda joint 130 are well-known to those skilled in the art and do not belong to the core improvement part of this application, so they will not be elaborated here.

[0083] In the description of this application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0084] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0086] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A housing structure applicable to a gear transmission box, characterized in that It includes a housing body (110), which is recessed inwardly with a receiving cavity (110a) for receiving a gear transmission mechanism (200). At the bottom of the receiving cavity (110a), there are an oil collecting structure (120), a first bearing groove (111), a second bearing groove (112), and an oil storage groove (113). The oil collecting structure (120) and the peripheral side of the housing body (110) surround to form an oil collecting groove (120a). There is a first oil guiding groove (114) between the oil collecting groove (120a) and the first bearing groove (111). There is a second oil guiding groove (115) between the first bearing groove (111) and the second bearing groove (112). There is a third oil guiding groove (116) between the second bearing groove (112) and the oil storage groove (113). The second oil guiding groove (115) and the third oil guiding groove (116) both extend along a first direction (X1). Wherein, when the gear transmission box is in a normal use state, the vertical direction of the housing body (110) is defined as a second direction (X2). The second direction (X2) intersects with the first direction (X1) and the included angle formed therebetween is an acute angle.

2. The housing structure applicable to a gear transmission case according to claim 1, characterized in that, The oil collecting structure (120) includes a first oil baffle (121) and a second oil baffle (122). Both the first oil baffle (121) and the second oil baffle (122) are arranged on the bottom of the cavity and are connected to the peripheral side wall of the housing body (110). Wherein, the first oil baffle (121), the second oil baffle (122) and the peripheral side wall of the housing body (110) jointly surround to form the oil collecting groove (120a). The first oil guiding groove (114) is arranged between the first oil baffle (121) and the second oil baffle (122).

3. The housing structure applicable to a gear transmission case according to claim 2, characterized in that, The first oil baffle (121) includes an oil guiding part (1210) and an oil blocking part (1211). The oil guiding part (1210) is arranged on the bottom of the receiving cavity (110a). The oil blocking part (1211) is arranged at one end of the oil guiding part (1210) and is connected to the peripheral side wall of the housing body (110). Wherein, a gap for the lubricating oil to enter and exit is formed between the oil guiding part (1210) and the peripheral side wall of the housing body (110). The second oil baffle (122) is arranged corresponding to the gap.

4. The housing structure applicable to a gear transmission case according to claim 3, characterized in that, The oil blocking part (1211) has an arc-shaped structure. The oil blocking part (1211) has an inner arc side and an opposite outer arc side. Among them, the inner arc side faces the first bearing groove (111), and the outer arc side faces the peripheral side wall of the housing body (110).

5. The housing structure applicable to a gear transmission case according to claim 2, characterized in that, There is a vent hole (110e) on the peripheral side wall of the housing body (110). The vent hole (110e) corresponds to and communicates with the oil collecting groove (120a). Wherein, a flare fitting (130) is further provided on the housing body (110). The flare fitting (130) is located at the vent hole (110e).

6. The housing structure applicable to a gear transmission case according to claim 1, characterized in that Along the third direction (X3), a first shaft hole is provided on the housing body (110) corresponding to the first bearing groove (111) and / or the second bearing groove (112). The housing structure (100) applicable to a gear transmission box further includes an end cover (150) provided on the housing body (110), and the end cover (150) is located in the corresponding first shaft hole and is in sealed cooperation with the hole wall of the first shaft hole. Wherein, the third direction (X3) is perpendicular to the first direction (X1) and the second direction (X2) respectively, and the first direction (X1) and the second direction (X2) are in the same plane.

7. The housing structure applicable to a gear transmission case according to claim 6, characterized in that, An oil inlet groove opening (151) and an oil outlet groove opening (152) are provided at the end of the end cover (150) facing the housing body (110) along the first direction (X1).

8. The housing structure applicable to a gear transmission case according to claim 6, characterized in that, A static sealing structure (160) is provided between the hole wall of the first shaft hole and the end cover (150), and / or a second shaft hole (153) is provided on the end cover (150), and a sealing groove is provided on the hole wall of the second shaft hole (153), and a dynamic sealing structure (170) is installed in the sealing groove.

9. The housing structure applicable to a gear transmission case according to any one of claims 1-8, characterized in that, A flow guide plate (140) is further provided on the peripheral side wall of the housing body (110). Along the second direction (X2), the flow guide plate (140) is located above the first bearing groove (111), and the flow guide plate (140) is used to collect the splashed lubricating oil and gather it, so that the gathered lubricating oil drips between the axes of the first bearing groove (111) and the second bearing groove (112) along the second direction (X2).

10. A gear transmission box, characterized in that, It includes a first housing structure (100a), a second housing structure (100b) and a gear transmission mechanism (200). The first housing structure (100a) and the second housing structure (100b) are arranged in alignment and detachably connected, and the gear transmission mechanism (200) is arranged between the first housing structure (100a) and the second housing structure (100b). Wherein, the first housing structure (100a) and / or the second housing structure (100b) adopts the housing structure (100) applicable to a gear transmission box according to any one of claims 1-9. During use, the static oil level height of the lubricating oil in the gear transmission box is defined as H2, and the dynamic oil level height is defined as H1, and H2 = (2.5 - 3.5) * H1 is satisfied.

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