Shell structure suitable for gear transmission box and gear transmission box

Abstract

The invention 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] The present application belongs to the technical field of transmission equipment, and specifically relates to a housing structure suitable for a gear transmission box and a gear transmission box. Background Art

[0002] The lubrication methods of gears include active lubrication by external lubrication system and passive lubrication by splashing. In the existing gear speed increaser, splashing lubrication is usually adopted for cost consideration, which mainly drives the lubricating oil in the housing to splash by the high-speed operation of the gears.

[0003] Specifically, in the gear speed increaser, an oil baffle, an oil receiving plate, an oil inlet passage, and a connecting oil passage are arranged on the housing. The oil baffle and the oil receiving plate collect splashing lubricating oil generated by the rotation of the gears, and the lubricating oil is lubricated to the upper bearing and the lower bearing arranged in the upper bearing seat and the lower bearing seat through the oil inlet passage and the connecting oil passage.

[0004] However, the oil passages opened on the housing are mostly through-hole structures, and the oil passage design is unreasonable. After the lubricant enters the chamber where the lower bearing is located, it will directly flow out through the oil port at the bottom, resulting in the chamber where the lower bearing is located having no oil storage function, which can easily lead to poor bearing lubrication and shorten the life of the bearing. Summary of the invention

[0005] The purpose of the present application is to provide a housing structure and a gear transmission box suitable for a gear transmission box, so as to solve the problem of short bearing life caused by poor bearing lubrication in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides a shell structure suitable for a gear transmission box, comprising a shell body, the shell body is inwardly concavely provided with a receiving cavity for accommodating a gear transmission mechanism, the cavity bottom of the receiving 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 peripheral side of the shell body are surrounded to form an oil collecting groove, a first oil guide groove is provided between the oil collecting groove and the first bearing groove, a second oil guide groove is provided between the first bearing groove and the second bearing groove, a third oil guide groove is provided between the second bearing groove and the oil storage groove, and the second oil guide groove and the third oil guide groove both extend along a first direction;

[0007] The vertical direction of the shell body when the gear transmission box is in normal use is defined as the second direction, and the angle formed by the intersection of the second direction and the first direction is 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 plate and a second oil baffle plate, wherein the first oil baffle plate and the second oil baffle plate are both disposed on the cavity bottom and connected to the peripheral side wall of the shell body;

[0010] The first oil baffle plate, the second oil baffle plate and the peripheral side wall of the shell body together surround the oil collecting groove, and the first oil guide groove is arranged between the first oil baffle plate and the second oil baffle plate.

[0011] In some embodiments, the first oil baffle plate includes an oil guide portion and an oil baffle portion, the oil guide portion is disposed on the cavity bottom of the accommodating cavity, and the oil baffle portion is disposed at one end of the oil guide portion and connected to the peripheral side wall of the shell body;

[0012] A gap is formed between the oil guide portion and the peripheral side wall of the shell body for the lubricating oil to enter and exit, and the second oil baffle is arranged corresponding to the gap.

[0013] In some embodiments, the oil baffle portion is an arc-shaped structure, and 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 shell body.

[0014] In some embodiments, a vent hole is provided on the peripheral side wall of the shell body, and the vent hole corresponds to and communicates with the oil collecting tank;

[0015] Wherein, a pagoda joint is also provided on the shell body, and the pagoda joint is located at the air vent.

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

[0017] The housing structure suitable for the gear transmission box further comprises an end cover arranged on the housing body, the end cover is located in the corresponding first shaft hole and is sealed with the hole wall of the first shaft hole;

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

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

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

[0021] In some embodiments, a guide plate is further provided on the peripheral side wall of the shell body, and along the second direction, the guide plate is located above the first bearing groove, and the guide plate is used to collect splashed lubricating oil and gather it so that the gathered lubricating oil drips between the axes of the first bearing groove and the second bearing groove along the second direction.

[0022] A second aspect of the present application further provides a gear transmission box, comprising a first housing structure, a second housing structure and a gear transmission mechanism, wherein the first housing structure and the second housing structure are arranged in a symmetrical manner and are detachably connected, and 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 adopts the housing structure applicable to the gear transmission box provided according to the first aspect above;

[0024] When in 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.

[0025] Compared with the prior art, the present application provides a shell structure and a gear transmission box suitable for a gear transmission box, wherein the shell structure suitable for a gear transmission box accommodates the gear transmission mechanism of the gear transmission box through a receiving cavity in the shell body; when the gear transmission box is in use, the shell defines a vertical direction as a second direction; and in the use state, the oil storage tank can store a certain amount of lubricating oil, when the gear transmission mechanism is running at high speed, the lubricating oil will be driven to splash onto the peripheral side wall of the shell body, and under the action of the oil collecting structure, the splashed lubricating oil is collected in the oil collecting tank, and then enters the first bearing groove through the first oil guide groove for lubrication, and then enters the second bearing groove through the second oil guide groove for lubrication, and finally flows back to the oil storage tank from the third oil guide groove. Since the second oil guide groove and the third oil guide groove both extend along the first direction, and the second direction intersects with the first direction and the angle formed is an acute angle, the extension direction of the second oil guide groove and the third oil guide groove is arranged to be inclined toward the oil storage groove. That is to say, when the shell body is in normal use, the second oil guide groove and the third oil guide groove are not at the bottom of the first bearing groove and the second bearing groove. In this way, the lubricating oil in the oil collecting groove will be partially stored in the first bearing groove after entering the first bearing groove, and will overflow to the second bearing groove through the second guide groove after the lubricating oil level reaches a certain height. The second bearing groove can also store a part of the lubricating oil, and will overflow to the oil storage groove through the third guide groove after the lubricating oil level reaches a certain height.

[0026] It can be seen from this that the housing structure suitable for the gear transmission box provided in the present application can ensure that lubricating oil is stored in the first bearing groove and the second bearing groove during use, so that the bearings always have sufficient lubricating oil for lubrication and cooling, thereby improving the lubrication effect of the bearings and extending their service life.

[0027] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 1 A schematic diagram of the structure of a gear transmission box provided in an embodiment of the present application arranged in a usage state;

[0030] Figure 2 A schematic diagram of a three-dimensional structure of a housing structure of a gear transmission box provided in an embodiment of the present application;

[0031] Figure 3 for Figure 1 The gear transmission box shown in the figure has a housing structure removed and indicates the splash and flow direction of the lubricating oil, as well as the height of the dynamic oil level as H1 and the height of the static oil level as H2;

[0032] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0033] Figure 5 for Figure 1 The gear transmission box shown is a rotational cross-sectional view taken along the AA direction with one housing structure removed;

[0034] Figure 6 Figure 1 The local structure cross-section view along the AA direction;

[0035] Figure 7 A schematic diagram of the three-dimensional structure of an end cover used in a shell structure provided in an embodiment of the present application.

[0036] Description of Reference Numerals

[0037] 100, shell structure; 100a, first shell structure; 100b, second shell structure; 110, shell body; 110a, receiving cavity; 110b, oil drain hole; 110c, oil filling hole; 110d, oil mark hole; 110e, air vent; 111, first bearing groove; 112, second bearing groove; 113, oil storage groove; 114, first oil guide groove; 115, second oil guide groove; 116, third oil guide groove; 120, oil collecting structure; 120a, oil collecting groove; 121, first oil baffle plate; 1210, oil guide part; 1211, oil baffle part; 122, second oil baffle plate; 130, pagoda joint; 140, guide plate; 150, end cover; 151, oil inlet slot; 152, oil outlet slot; 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 DESCRIPTION

[0042] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is 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] See also Figure 1 , Figure 2 and Figure 3 The present embodiment provides a housing structure 100 suitable for a gear transmission box, which is hereinafter referred to as the housing structure 100 . The gear transmission box includes a gear transmission mechanism 200 .

[0045] The shell structure 100 includes a shell body 110, which is recessed inwardly with 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 shell body 110 surround the oil collecting groove 120a. A first oil guide groove 114 is provided between the oil collecting groove 120a and the first bearing groove 111, a second oil guide groove 115 is provided between the first bearing groove 111 and the second bearing groove 112, and a third oil guide groove 116 is provided between the second bearing groove 112 and the oil storage groove 113. The second oil guide groove 115 and the third oil guide groove 116 both extend along the first direction X1.

[0046] The vertical direction of the shell body 110 when the gear transmission box is in normal use is defined as the second direction X2, and the 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 connected to the oil storage groove 113 is provided on the peripheral side wall of the shell body 110. The oil drain hole 110b is located at the lowest position of the shell body 110 when it is in normal use, and the axis of the oil drain hole 110b is located in the second direction X2, so that the lubricating oil in the oil storage groove 113 can be drained.

[0048] In some embodiments, the shell body 110 is further provided with a filling hole 110c for filling lubricating oil and an oil mark hole 110d for observing the lubricating oil level. In use, the filling hole 110c is sealed with a plug, and the oil mark hole 110d is provided with a sealed window.

[0049] Please also read Figure 3 and Figure 5 It can be understood that when the housing structure 100 is applied to a gear transmission box, the gear transmission mechanism 200 of the gear transmission box is received by the receiving cavity 110a in the housing body 110. In addition, when in use, the oil drain hole 110b is located at the lowest position of the peripheral side wall of the housing body 110 to facilitate the discharge of the lubricating oil stored in the oil storage groove 113, and the axis of the oil drain hole 110b is defined to be located in the second direction X2 (such as Figure 1As shown, when the gear transmission box is in normal use, the second direction X2 is vertically upward). When in use, the oil storage groove 113 can store a certain amount of lubricating oil. When the gear transmission mechanism 200 is running at a high speed, the lubricating oil will be driven to splash onto the peripheral side wall of the shell body 110, and the splashed lubricating oil will be collected into the oil collecting groove 120a under the action of the oil collecting structure 120, and then enter the first bearing groove 111 through the first oil guide groove 114 for lubrication, and then enter the second bearing groove 112 through the second oil guide groove 115 for lubrication, and finally flow back to the oil storage groove 113 through the third oil guide groove 116. In the present embodiment, since the second oil guide groove 115 and the third oil guide groove 116 both extend along the first direction X1, and the second direction X2 intersects with the first direction X1 and the angle formed is an acute angle, the extension direction of the second oil guide groove 115 and the third oil guide groove 116 is arranged to be inclined toward the oil storage groove 113. That is to say, when the shell body 110 is in normal use, the second oil guide groove 115 and the third oil guide groove 116 are not at the bottom of the first bearing groove 111 and the second bearing groove 112. In this way, after the lubricating oil in the oil collecting groove 120a enters the first bearing groove 111, a portion of it will be stored in 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 guide groove. The second bearing groove 112 can also store a portion of the lubricating oil, and after the lubricating oil level reaches a certain height, it will overflow to the oil storage groove 113 through the third guide groove.

[0050] It can be seen that during the use of the housing structure 100 provided in the gear transmission box, it can ensure that there is sufficient lubricating oil in the first bearing groove 111 and the second bearing groove 112, so that the bearings always have sufficient lubricating oil for lubrication and cooling, thereby improving the lubrication effect of the bearings and extending their service life.

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

[0052] See also Figure 2 , Figure 3 and Figure 4 The oil collecting structure 120 includes a first oil baffle plate 121 and a second oil baffle plate 122, both of which are arranged on the cavity bottom and connected to the peripheral side wall of the shell body 110. The first oil baffle plate 121, the second oil baffle plate 122 and the peripheral side wall of the shell body 110 are surrounded together to form an oil collecting groove 120a, and the first oil guide groove 114 is arranged between the first oil baffle plate 121 and the second oil baffle plate 122.

[0053] It is understandable that in this embodiment, the oil collecting groove 120a is fan-shaped, and the fan angle ranges from 50° to 85°, preferably 70°. In this way, sufficient oil collection is ensured while the lubricating oil can quickly flow out of the oil collecting groove 120a.

[0054] The first oil baffle plate 121 includes an oil guide portion 1210 and an oil baffle portion 1211. The oil guide portion 1210 is disposed on the bottom of the receiving cavity 110a. The oil baffle portion 1211 is disposed at one end of the oil guide portion 1210 and connected to the peripheral side wall of the shell body 110.

[0055] Furthermore, the oil guide portion 1210 is in an arc-shaped structure, and the oil baffle portion 1211 has an inner arc side and an opposite outer arc side, wherein the inner arc side faces the first bearing groove 111, and the outer arc side faces the peripheral side wall of the shell body 110. In this way, the inner arc side can be constructed into an arc-shaped avoidance structure 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 shell body 110 is also in an arc shape, the oil guide portion 1210 and the oil baffle portion 1211 and the oil collecting groove 120a constructed by the shell body 110 are in a fan ring shape, which improves the oil collection effect.

[0056] Optionally, the fan angle of the oil collecting groove 120a can be selected to be 50° to 78°, preferably 70°. In this way, the oil collecting space is large, more splashing oil can be received, and the outflow speed is fast, so that the bearing is lubricated and cooled more fully.

[0057] In some embodiments, the oil guide portion 1210 may also adopt a straight plate structure, and avoid the active area of ​​the gears during layout to prevent interference.

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

[0059] A notch is formed between the oil guide portion 1210 and the peripheral side wall of the shell body 110 for the lubricating oil to enter and exit, the second oil baffle plate 122 is arranged corresponding to the notch, and the first oil guide groove 114 is arranged at the notch, so as to guide the collected lubricating oil into the first bearing groove 111. In this embodiment, the second oil baffle plate 122 not only blocks the oil at the notch, but also acts as a reinforcing rib of the shell body 110 to enhance the structural strength of the shell body 110.

[0060] See also Figure 2 , Figure 3 and Figure 4 A vent hole 110e is provided on the peripheral side wall of the shell body 110, and the vent hole 110e corresponds to and is connected to the oil collecting groove 120a; wherein, a pagoda joint 130 is also provided on the shell body 110, and the pagoda joint 130 is located at the vent 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 sealing structure 160 is provided between the hole wall of the first axial hole and the end cover 150. Specifically, an O-ring or a T-ring may be provided between the hole wall of the first axial hole and the end cover 150. Of course, a static sealing form in which a flat sealant is applied to the joint surface of the end cover 150 may also be used to achieve sealing of the end cover 150.

[0066] In some embodiments, the end cover 150 is provided with a second shaft hole 153, the hole wall of the second shaft hole 153 is provided with a sealing groove, and a dynamic sealing structure 170 is installed in the sealing 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, and the dynamic sealing structure 170 is used to achieve the sealing between the input shaft 300 or the output shaft 400 and the corresponding end cover 150 to isolate lubricating oil and dust. Among them, the dynamic sealing 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, or other sealing methods may 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 may also be made of sealing materials such as non-fluororubber, for example, nitrile rubber, polytetrafluoroethylene and the like.

[0069] See also Figure 2 and Figure 3 Furthermore, in this embodiment, a guide plate 140 is further provided on the peripheral side wall of the shell body 110. The guide plate 140 is located above the first bearing groove 111 along the second direction X2. The guide plate 140 is used to collect splashed lubricating oil and collect it so that the collected 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 can drop to the meshing position of the gear in the gear transmission mechanism 200 to lubricate and cool the meshing position of the gear and extend the service life of the gear. Furthermore, the guide plate 140 can also be equivalent to the reinforcing rib of the shell body 110 to improve the structural strength of the shell body 110.

[0070] See also 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 a symmetrical manner and are detachably connected. 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 adopts the housing structure 100 suitable for the gear transmission box provided in the above embodiment.

[0071] Optionally, the gear transmission box can be a hybrid wheat machine generator speed increaser, or a speed reducer or the like.

[0072] See also Figure 3 It should be noted that the gear transmission box needs to be filled with lubricating oil before use, wherein the static oil level of the lubricating oil in the gear transmission box is defined as H2, and the dynamic oil level of the gear transmission box during normal operation is defined as H1, H2 = (2.5 ~ 3.5) * H1, to ensure that the gear transmission box has a better lubrication effect. And at the dynamic oil level, ensure that the lubricating oil can submerge the tooth root of the gear 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 technology, the oil inlet channel and the connecting oil channel on the shell are both hole structures, so a core mold needs to be used when casting the oil channel, which increases the complexity of casting and increases the scrap rate. In the present application, the oil tank does not need to use a core mold, and the upper and lower molds are directly removed, which is simple to cast, has a low scrap rate, and significantly reduces the casting cost.

[0075] (2) The existing solution does not consider the oil blocking at the position of the air hole 110e. In the present application, the air hole 110e is arranged corresponding to the oil collecting structure 120 and has a first oil blocking plate 121 to block the oil. The oil collecting structure 120 strengthens the strength of the shell body 110 while ensuring that the splashing lubricating oil will not splash directly onto the air hole 110e, thereby avoiding direct leakage of the lubricating oil from the air hole 110e.

[0076] (3) The existing solution does not take into account the lubrication and cooling of the gear meshing position. In the present application, a guide plate 140 is provided. While the guide plate 140 strengthens the strength of the shell body 110, the oil droplets condensed on the shell body 110 will also flow into the gear meshing position along the guide plate 140.

[0077] (4) In the existing solution, the oil receiving plate is used as the oil collecting groove 120a, and the oil collecting space is small. In the present application, a first oil baffle plate 121, a second oil baffle plate 122 and the inner peripheral wall of the shell body 110 are provided to form the oil collecting groove 120a. The oil collecting groove 120a is a fan-shaped design, and the fan-shaped angle can be selected from 50° to 78°, preferably 70°. The oil collecting space is large and can receive more splashing oil. At the same time, the outflow speed is ensured to be fast, so that the bearing lubrication and cooling are more sufficient.

[0078] (5) Compared with the existing solution in which the outlet oil path structure of the lower bearing is at the bottom of the bearing, the second oil guide groove 115 and the third oil guide groove 116 in the present application are arranged at an oblique angle, which not only meets the needs of lubrication and cooling of the bearing, but also ensures that the bearing can be in an oil lubricated state at all times.

[0079] (6) The present application designs an oil inlet groove 151 and an oil outlet groove 152 on the end cover 150, so that the lubricating oil can enter and exit the first bearing groove 111 and the second bearing groove 112 more smoothly, rather than only entering and flowing out through the rotating bearing rollers, thereby fully ensuring the lubrication and heat dissipation of the bearings.

[0080] (7) The present application adopts a combination of static sealing and dynamic sealing on the end cover 150. The static sealing adopts an O-ring and a flat sealant, and the dynamic sealing adopts a skeleton oil seal. It has a simple structure, low cost and high reliability.

[0081] It should be noted that in the present application, unless otherwise specified, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like used to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] The gear transmission mechanism 200 is formed by the mutual meshing of gears. 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 the present application, so they will not be described here in detail.

[0083] In the description of the present application, it should be understood that 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, 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 with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A housing structure suitable for a gear transmission box, characterized in that: The invention comprises a shell body (110), wherein the shell body (110) is provided with an accommodation cavity (110a) for accommodating a gear transmission mechanism (200) inwardly, and the bottom of the accommodation 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), wherein the oil collecting structure (120) and the peripheral side of the shell body (110) surround to form an oil collecting groove (120a), wherein a first oil guide groove (114) is provided between the oil collecting groove (120a) and the first bearing groove (111), wherein a second oil guide groove (115) is provided between the first bearing groove (111) and the second bearing groove (112), wherein a third oil guide groove (116) is provided between the second bearing groove (112) and the oil storage groove (113), and wherein both the second oil guide groove (115) and the third oil guide groove (116) extend along a first direction (X1); The vertical direction of the shell body (110) when the gear transmission box is in normal use is defined as the second direction (X2), and the angle formed by the intersection of the second direction (X2) and the first direction (X1) is an acute angle.

2. The housing structure suitable for a gear transmission box according to claim 1, characterized in that: The oil collecting structure (120) comprises a first oil baffle plate (121) and a second oil baffle plate (122), wherein the first oil baffle plate (121) and the second oil baffle plate (122) are both arranged on the cavity bottom and connected to the peripheral side wall of the shell body (110); The first oil baffle plate (121), the second oil baffle plate (122) and the peripheral side wall of the shell body (110) together surround the oil collecting groove (120a), and the first oil guide groove (114) is arranged between the first oil baffle plate (121) and the second oil baffle plate (122).

3. The housing structure suitable for a gear transmission box according to claim 2, characterized in that: The first oil baffle plate (121) comprises an oil guide portion (1210) and an oil baffle portion (1211), the oil guide portion (1210) being arranged on the bottom of the accommodating cavity (110a), and the oil baffle portion (1211) being arranged at one end of the oil guide portion (1210) and connected to the peripheral side wall of the shell body (110); A notch is formed between the oil guide portion (1210) and the peripheral side wall of the shell body (110) for the lubricating oil to enter and exit, and the second oil baffle plate (122) is arranged corresponding to the notch.

4. The housing structure suitable for a gear transmission box according to claim 3, characterized in that: The oil-blocking portion (1211) is in an arc-shaped structure, and has an inner arc side and an opposite outer arc side, wherein the inner arc side faces the first bearing groove (111) and the outer arc side faces the peripheral side wall of the shell body (110).

5. The housing structure suitable for a gear transmission box according to claim 2, characterized in that: A vent hole (110e) is provided on the peripheral side wall of the shell body (110), and the vent hole (110e) corresponds to and is in communication with the oil collecting groove (120a); Wherein, the shell body (110) is also provided with a pagoda joint (130), and the pagoda joint (130) is located at the air vent (110e).

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

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

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

9. The housing structure suitable for a gear transmission box according to any one of claims 1 to 8, characterized in that: A guide plate (140) is also provided on the peripheral side wall of the shell body (110); along the second direction (X2), the guide plate (140) is located above the first bearing groove (111); the guide plate (140) is used to collect 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).

10. A gear transmission box, characterized in that: The invention comprises a first housing structure (100a), a second housing structure (100b) and a gear transmission mechanism (200), wherein the first housing structure (100a) and the second housing structure (100b) are arranged in a symmetrical manner and are 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 the gear transmission box according to any one of claims 1 to 9; When in 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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