Lubricating oil directional distribution device and reducer

Abstract

The lubricating oil directional distribution device and reducer provided by the present invention, the lubricating oil directional distribution device includes an oil stirring mechanism and an oil collecting mechanism, the oil stirring mechanism includes a housing and a gear rotatably arranged on the housing, the oil collecting mechanism includes an oil collecting structure, an oil inlet opened on one side of the oil collecting structure and an oil distribution structure arranged on the bottom surface of the oil collecting structure, the oil inlet is used to provide an oil inlet channel for the lubricating oil splashed out by the rotation of the gear to enter the oil collecting cavity of the oil collecting mechanism, and the oil distribution structure is used to transport the collected lubricating oil to the gear. The lubricating oil directional distribution device collects the lubricating oil splashed out by the rotation of the gear through the oil collecting mechanism, and distributes the collected lubricating oil to the gear through the oil distribution structure, which plays the role of recycling the lubricating oil and reducing the oil stirring loss when the gear rotates, and at the same time effectively avoids excessive temperature rise of the reducer system, improves the transmission efficiency and the service life of the reducer.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, and in particular to a lubricating oil directional distribution device and a speed reducer. Background Art

[0002] With the increasing adoption of pure electric vehicles, the use of electric drive products is also becoming increasingly widespread. The pursuit of higher power and longer driving range in electric vehicles also requires electric drive powertrains to gradually increase their maximum speed and torque, improve overall system efficiency, and achieve higher levels of NVH and temperature rise performance. Within electric drive powertrains, the reducer is responsible for transmitting the power generated by the motor to the entire vehicle drivetrain, and is also contributing significantly to improving efficiency, NVH, and oil temperature rise.

[0003] In order to meet the starting response requirements of the entire vehicle, the gears and bearing systems of the reducer need to be fully lubricated during starting and low speeds to support rapid starting response, and ensure that the gears and bearings can quickly establish oil film lubrication during starting and low speed conditions to avoid durability problems; when the entire vehicle is traveling at medium and high speeds, the reducer gears and bearings generally have established a certain amount of oil film lubrication. At this time, from the perspective of vehicle efficiency loss, it is necessary to minimize the gear churning loss; in addition, excessive oil churning loss under high speed and high torque conditions will cause the oil temperature of the entire reducer to rise significantly and rapidly. Once the time is too long and the allowable oil temperature of the reducer is exceeded, the oil will deteriorate and become bonded, which will cause the reducer to fail.

[0004] In summary, from the perspective of reducer lubrication distribution, it is required that there is sufficient oil around the gears and bearings of the reducer at startup and low speed to ensure the establishment of the lubricating oil film; it is also hoped that at high speed and high torque, the amount of oil around the gears and bearings of the reducer is as small as possible to reduce oil churning losses, avoid excessive temperature rise in the system, extend the life of the reducer, and improve transmission efficiency. Summary of the Invention

[0005] The embodiment of the present invention provides directional distribution of reducer lubricating oil to solve the technical problem of how to ensure that there is sufficient oil around the gears and bearings of the reducer at startup and low speed, and to reduce the oil churning loss of gear rotation at high speed and high torque of the reducer.

[0006] In the first aspect, the present invention provides a directional distribution device for lubricating oil, including an oil stirring mechanism and an oil collecting mechanism, the oil stirring mechanism including a box body and a gear rotatably arranged on the box body, the oil collecting mechanism including an oil collecting structure, an oil inlet opened on one side of the oil collecting structure and an oil distribution structure arranged on the bottom surface of the oil collecting structure, the oil inlet is used to provide an oil inlet channel for the lubricating oil splashed out by the rotation of the gear to enter the oil collecting cavity of the oil collecting mechanism, and the oil distribution structure is used to transport the collected lubricating oil to the gear.

[0007] In some embodiments, the oil collecting structure is configured as a trapezoidal box, and the oil inlet is located above a lower side panel of the trapezoidal box.

[0008] In some embodiments, the bottom of the trapezoidal box is arranged horizontally; or,

[0009] The bottom of the trapezoidal box is tilted, and the tilt direction of the bottom surface is toward the upper side of the oil inlet.

[0010] In some embodiments, the oil distribution device is an oil outlet hole opened on the bottom surface, and the oil outlet hole corresponds to the position of the gear in the vertical direction.

[0011] In some embodiments, the oil distribution device is an oil outlet hole opened on the bottom surface and an oil distribution pipe connected to the oil outlet hole, and the oil distribution pipe is used to distribute oil to the gear.

[0012] In some embodiments, an oil filtering device is provided in the oil distribution pipe.

[0013] In some embodiments, there are multiple gears, the number of the oil outlet holes corresponds to the number of the gears, and the aperture sizes of the multiple oil outlet holes are in direct proportion to the oil requirements of the corresponding gears.

[0014] In some embodiments, there are multiple gears, which are arranged in a unidirectional manner along the box body in proportion to different oil requirements, and the bottom surface is inclined, with the inclination direction facing obliquely upward from the oil inlet.

[0015] In some embodiments, oil hole covers are provided at the plurality of oil outlet holes in an openable and closable manner.

[0016] In a second aspect, the present invention provides a speed reducer comprising the lubricating oil directional distribution device as described above.

[0017] The beneficial effects brought about by the technical solution provided by the present invention include:

[0018] The lubricating oil directional distribution device and reducer provided by the present invention collect the lubricating oil splashed by the rotating gears through an oil collecting mechanism, and distribute the collected lubricating oil to the gears through an oil distribution structure, thereby recovering the lubricating oil and reducing the oil churning loss during gear rotation. At the same time, it effectively avoids excessive temperature rise in the reducer system, thereby improving transmission efficiency and the service life of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a lubricating oil directional distribution device provided in an embodiment of the present invention.

[0021] In the picture:

[0022] 10. Oil collecting structure; 20. Oil inlet; 30. Oil distribution structure; 41. Box; 42. Gear. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] The embodiment of the present invention provides a directional distribution of lubricating oil for the reducer, which can solve the technical problem of how to ensure that there is sufficient oil around the gear 42 and bearings of the reducer at startup and low speed, and reduce the oil stirring loss of the gear 42 rotating at high speed and high torque of the reducer.

[0025] Please refer to Figure 1 The lubricating oil directional distribution device provided by the present invention includes an oil stirring mechanism and an oil collecting mechanism. The oil stirring mechanism includes a box body 41 and a gear 42 rotatably arranged on the box body 41. The oil collecting mechanism includes an oil collecting structure 10 and an oil inlet 20 opened on one side of the oil collecting structure 10. The oil inlet 20 corresponds to the direction of oil splashing when the gear 42 rotates, and is used to collect the lubricating oil splashed by the rotation of the gear 42.

[0026] The lubricating oil directional distribution device provided by the present invention ensures that there is sufficient oil coating around the gear 42 teeth and bearings to form a lubricating oil film. When the gear 42 and bearing system of the reducer are at startup and low speed, they can be fully lubricated to support rapid startup response. When the gear 42 and bearing system of the reducer are at high speed and high torque, the splashed lubricating oil is collected by the oil collecting mechanism to reduce oil stirring loss; the lubricating oil in the oil collecting chamber is then directed to the gear 42 or bearing through the oil distribution structure 30, and the lubricating oil on the gear 42 and bearing is cooled by distributing lubricating oil at a lower temperature, thereby avoiding excessive temperature rise of the system and effectively improving the life and transmission efficiency of the reducer.

[0027] In one embodiment, in order to provide a better oil collection effect for the splashed lubricating oil, the oil inlet 20 is located at the upper side of the gear 42. More specifically, when the gear 42 rotates counterclockwise, the oil inlet 20 is located at the upper left position of the gear 42; when the gear 42 rotates clockwise, the oil inlet 20 is located at the upper right position of the gear 42.

[0028] The gear 42 is rotatably disposed in the housing 41 . In one embodiment, the gear 42 is rotatably connected to a gear shaft via a bearing. The gear shaft is mounted and fixed on two oppositely disposed panels of the housing 41 .

[0029] In one embodiment, the oil collection mechanism is configured as a trapezoidal box body, comprising two side panels and front and rear panels, with one side panel being taller than the other. The upper opening of the lower side panel serves as an oil inlet 20. The two side panels and the front and rear panels form an oil collection chamber for the collected lubricating oil.

[0030] In one embodiment, the oil collecting structure 10 can also be set as a hollow ellipsoid, sphere, cube or cuboid, and the oil inlet 20 is opened on the upper side thereof, as long as an oil inlet channel can be provided for the splashed lubricating oil and an oil collecting chamber can be provided for the splashed lubricating oil.

[0031] In one embodiment, the bottom surface of the oil collecting structure 10 is a flat bottom surface and is arranged horizontally. The oil distribution structure 30 is an oil outlet hole arranged on the bottom surface. The oil outlet hole is arranged vertically corresponding to the position of the gear 42. When the splashed lubricating oil enters the oil collecting chamber in the box, it flows out from the oil outlet hole and flows to the vertically corresponding position of the gear 42 under the action of gravity, thereby realizing a complete oil collection and oil distribution cycle.

[0032] In one embodiment, the bottom surface of the oil collecting structure 10 is a flat bottom surface and is arranged horizontally. The oil distribution structure 30 is an oil outlet hole provided on the bottom surface and an oil distribution pipe connected to the oil outlet hole. The oil outlet hole and the gear 42 do not correspond in position in the vertical direction. The oil outlet of the oil distribution pipe corresponds to the position of the gear 42, providing a better cooling effect for the collected lubricating oil in a limited space.

[0033] In one embodiment, the bottom surface of the oil collecting structure 10 is a flat bottom surface and is arranged horizontally. There are multiple gears 42, and the oil distribution structure 30 is a plurality of oil outlet holes arranged on the bottom surface of the oil collecting structure 10. The multiple oil outlet holes correspond one-to-one to the multiple gears 42 in the vertical direction. After the splashed lubricating oil enters the oil collecting chamber through the oil inlet 20, it flows to the corresponding gears 42 through the multiple oil outlet holes under the action of gravity.

[0034] The multiple gears 42 may have different rotational speeds and sizes, resulting in different lubricating oil requirements. After determining the lubricating oil requirements of the multiple gears 42, the apertures of the multiple oil outlets are set accordingly. In one embodiment, the bottom surface of the oil collection structure 10 is flat and horizontally arranged. There are multiple gears 42, and the oil distribution structure 30 comprises multiple oil outlets disposed on the bottom surface of the oil collection structure 10. The multiple oil outlets correspond vertically to the multiple gears 42, and the apertures of the multiple oil outlets are set accordingly based on the lubricating oil requirements of the multiple gears 42. The splashed lubricating oil enters the oil collection chamber through the oil inlet 20, and then flows through the multiple oil outlets under the action of gravity to the corresponding gears 42, achieving targeted and quantitative oil distribution.

[0035] The multiple gears 42 have different requirements for lubricating oil due to different rotation speeds and different sizes of the gears 42. After obtaining the lubricating oil requirements of the multiple gears 42, the aperture sizes of the multiple oil outlets are correspondingly set according to the gears 42 with different lubricating oil requirements.

[0036] In one embodiment, the bottom surface of the oil collecting structure 10 is a flat bottom surface and is inclined, with the inclination direction facing obliquely above the oil inlet 20. There are multiple gears 42, and the oil distribution structure 30 is a plurality of oil outlet holes provided on the bottom surface of the oil collecting structure 10. The multiple oil outlet holes correspond one-to-one to the multiple gears 42 in the vertical direction, and the apertures of the multiple oil outlet holes are the same. The inclination angle of the bottom surface is set according to the lubricating oil demand of the multiple gears 42. After the splashed lubricating oil enters the oil collecting chamber through the oil inlet 20, it flows to the corresponding gears 42 through the multiple oil outlet holes under the action of gravity, thereby realizing directional and quantitative oil distribution.

[0037] In one embodiment, an oil hole cover is provided at the oil outlet in an openable and closable manner to achieve oil distribution control over the lubricating oil in the oil collecting chamber, and the lubricating oil in the oil collecting chamber is distributed by opening the oil hole cover.

[0038] In one embodiment, the oil hole cover is implemented as an electronically controlled oil hole cover to achieve automatic control of oil distribution.

[0039] In one embodiment, the oil distribution structure 30 includes an oil outlet hole opened on the bottom surface and an oil distribution pipe connected to the oil outlet hole. A filter is provided at the oil outlet hole. The filter is used to filter out possible deteriorated and glued components in the lubricating oil splashed out by the rotation of the gear 42, thereby playing the role of oil filtering, and preventing the gear 42 from rotating at high speed for a long time, and the deteriorated oil caused by deterioration and glue exceeding the allowable oil temperature of the reducer affects the rotation stability of the reducer gear 42.

[0040] In one embodiment, the oil distribution structure 30 includes an oil outlet hole opened on the bottom surface of the oil collecting mechanism and an oil distribution pipe connected to the oil outlet hole. A spring is provided in the oil distribution pipe, and two pins of the spring respectively abut against the hole wall of the oil outlet hole and the middle inner wall surface of the oil distribution pipe. The spring plays a reflux bonding and filtering role on the deteriorated and glued components in the lubricating oil distributed in the oil distribution pipe, thereby preventing the deteriorated and glued lubricating oil from clogging the oil outlet hole and affecting the oil recovery and utilization effect in the oil collecting chamber.

[0041] In one embodiment, one pin of the spring is detachably connected to the inner wall surface of the oil outlet hole, and the other pin is movably overlapped on the middle inner wall surface of the oil distribution pipe, so as to facilitate the detachable cleaning of the deteriorated lubricating oil adhered to the spring, so as to ensure the effectiveness of the oil collection and distribution of the lubricating oil directional distribution device.

[0042] In one embodiment, the oil distribution structure 30 includes an oil outlet hole preset on the bottom surface of the oil collecting structure 10 and a bellows connected to the oil outlet hole. The oil outlet of the bellows corresponds to the position of the gear 42, providing a directional oil distribution guide channel for the lubricating oil in the oil collecting chamber. At the same time, the inner wall surface of the bellows provides a bonding surface with greater friction for the deteriorated and glued lubricating oil, thereby playing the role of oil filtering.

[0043] Based on the same inventive concept, the present invention also provides a reducer, which includes the lubricating oil directional distribution device as described above, which recovers the lubricating oil splashed out of the oil stirring mechanism through the oil collecting mechanism, and distributes the lubricating oil in the oil collecting chamber to the gear 42 through the oil distribution structure 30, thereby reducing the oil stirring loss of the gear 42; the distributed lubricating oil reduces the temperature of the lubricating oil in the system, avoids excessive temperature rise of the system, and effectively improves the life and transmission efficiency of the reducer.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention 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 on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0046] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be construed in the widest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. A lubricating oil directional distribution device, characterized in that: include: An oil stirring mechanism and an oil collecting mechanism, wherein the oil stirring mechanism comprises a box body and a gear rotatably arranged on the box body, and the oil collecting mechanism comprises an oil collecting structure, an oil inlet opened on one side of the oil collecting structure, and an oil distribution structure arranged on the bottom surface of the oil collecting structure, wherein the oil inlet is used to provide an oil inlet channel for the lubricating oil splashed out by the rotation of the gear to enter the oil collecting cavity of the oil collecting mechanism, and the oil distribution structure is used to transport the collected lubricating oil to the gear; The oil collecting structure is configured as a trapezoidal box, and the oil inlet is located above a lower side panel of the trapezoidal box; The oil distribution structure is an oil outlet hole opened on the bottom surface, and the oil outlet hole corresponds to the position of the gear in the vertical direction; The oil distribution structure comprises an oil outlet hole opened on the bottom surface and an oil distribution pipe connected with the oil outlet hole, a filter screen is arranged at the oil outlet hole, a spring is arranged in the oil distribution pipe, one pin of the spring is detachably connected to the inner wall surface of the oil outlet hole, and the other pin is movably overlapped on the middle inner wall surface of the oil distribution pipe; There are multiple gears, and the multiple gears are arranged in a unidirectional manner along the box in proportion to different oil requirements; If the gear rotates counterclockwise, the oil inlet is located at the upper left position of the gear; If the gear rotates clockwise, the oil inlet is located at the upper right position of the gear; The plurality of oil outlet holes are provided with oil hole covers in an openable and closable manner; The bottom of the trapezoidal box is tilted, and the tilt direction of the bottom surface is toward the upper side of the oil inlet; The apertures of the multiple oil outlet holes of the oil distribution structure are the same, and the inclination angle of the bottom surface is set according to the lubricating oil demand of the multiple gears.

2. A reducer, characterized in that: It comprises the lubricating oil directional distribution device as claimed in claim 1.

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