A gear box
Patent Information
- Application Number
- CN202522463510.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-11-20
AI Technical Summary
但是：由于所述齿轮腔的顶部侧壁为平面，使得飞溅到其上的冷却油在落下时，不易落至所述第一齿轮与所述第二齿轮的啮合处，润滑效果存在提升的空间
[0005]本申请主要目的在于提供一种齿轮箱，包括箱体组件和齿轮组，所述箱体组件包括前箱体和后箱体，所述前箱体和所述后箱体相向的一侧具有凹腔，所述前箱体与所述后箱体固定连接，且两所述凹腔共同形成齿轮腔，所述齿轮腔的腔壁截面呈环形跑道状，所述齿轮组包括第一齿轮和第二齿轮，所述第一齿轮和所述第二齿轮均转动安装在所述齿轮腔内，所述第一齿轮与所述第二齿轮啮合，其中，所述齿轮腔的腔壁中段具有两弧状凸起，两所述弧状凸起的朝向相反，所述齿轮腔内填充有冷却油；两所述弧状凸起分别位于所述第一齿轮与所述第二齿轮啮合处的顶部和底部，所述冷却油的高度低于所述第一齿轮的中心，进而实现飞溅至齿轮腔顶壁腔壁的冷却油可集中流向弧状凸起并滴落至第一齿轮和第二齿轮的啮合处，相较于现有技术，具有润滑效果更好的优势。
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Figure CN224800928U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gear reduction device technology, and more specifically to a gearbox. Background Technology
[0002] A gearbox, also known as a transmission, is a mechanical device used to change speed and torque.
[0003] There is a gearbox, such as Figure 3 As shown, the device includes a housing assembly 90 and a gear set 91. The housing assembly 90 includes a front housing and a rear housing, with cavities on opposite sides of the front and rear housings. The front and rear housings are fixedly connected, and the two cavities together form a gear cavity. The cross-section of the gear cavity wall is annular racetrack-shaped. The gear set 91 includes a first gear and a second gear, both of which are rotatably mounted within the gear cavity. The first gear meshes with the second gear, and the gear cavity is filled with cooling oil. It should be noted that when the first and second gears rotate circumferentially, the gear set 91 contacts the cooling oil and provides lubrication. However, because the top sidewall of the gear cavity is flat, the cooling oil splashed onto it is less likely to fall to the meshing point of the first and second gears, leaving room for improvement in lubrication.
[0004] Therefore, there is a need to provide a gearbox with better lubrication. Summary of the Invention
[0005] The main objective of this application is to provide a gearbox, including a housing assembly and a gear set. The housing assembly includes a front housing and a rear housing, with a cavity on one side of each housing facing the other. The front housing and the rear housing are fixedly connected, and the two cavities together form a gear cavity. The cross-section of the gear cavity wall is annular racetrack-shaped. The gear set includes a first gear and a second gear, both of which are rotatably mounted within the gear cavity. The first gear meshes with the second gear. The gear cavity wall has two arc-shaped protrusions in the middle section, with opposite orientations. The gear cavity is filled with cooling oil. The two arc-shaped protrusions are located at the top and bottom of the meshing point of the first gear and the second gear, respectively. The height of the cooling oil is lower than the center of the first gear, thereby allowing the cooling oil splashed onto the top wall of the gear cavity to flow towards the arc-shaped protrusions and drip onto the meshing point of the first and second gears. Compared to the prior art, this provides better lubrication.
[0006] Another objective of this application is to provide a gearbox in which a plurality of drainage grooves arranged in a circular array are provided on both end faces of the first gear and the second gear, and a mounting hole is provided at the center of both the first gear and the second gear. One end of the drainage groove extends to the mounting hole so as to intercept part of the cooling oil into the drainage groove and fly outward during gear rotation.
[0007] To achieve at least one of the above-mentioned objectives, this application provides a gearbox, including a housing assembly and a gear set. The housing assembly includes a front housing and a rear housing, with a cavity on one side of each housing facing the other. The front housing and the rear housing are fixedly connected, and the two cavities together form a gear cavity. The cross-section of the gear cavity wall is annular racetrack-shaped. The gear set includes a first gear and a second gear, both of which are rotatably mounted within the gear cavity. The first gear meshes with the second gear. The gear set further includes: The gear cavity has two arc-shaped protrusions in the middle section of its cavity wall, with the two arc-shaped protrusions facing opposite directions. The gear cavity is filled with cooling oil. The two arc-shaped protrusions are located at the top and bottom of the meshing point of the first gear and the second gear, respectively. The height of the cooling oil is lower than the center of the first gear.
[0008] In one or more embodiments of this application, both the first gear and the second gear have a plurality of drainage grooves arranged in a circular array on their end faces, and both the first gear and the second gear have an assembly hole at their center, with one end of the drainage groove extending to the assembly hole.
[0009] In one or more embodiments of this application, one side of the drainage channel has an extension piece, the extension piece is fixedly connected to the first gear or the second gear, and one side of the extension piece extends to the outside of the opening of the drainage channel.
[0010] In one or more embodiments of this application, one end sidewall of the gear cavity has an abutment plane and an insertion hole, and the gearbox further includes a first sealing member, which is threadedly connected to the insertion hole and seals the insertion hole. The abutment plane is located directly below the insertion hole and is covered by the cooling oil.
[0011] In one or more embodiments of this application, the gearbox includes a screw-in hole and an oil drain hole. The screw-in hole is located in the middle section of an arc-shaped protrusion below the first gear, and the oil drain hole is located on the side of the screw-in hole. The two ends of the oil drain hole are respectively connected to the screw-in hole and the gear cavity. The gearbox also includes a sealing bolt, which is threadedly connected to the screw-in hole. The end of the sealing bolt has a magnetic attraction element, which is fixedly connected to the sealing bolt. The end of the sealing bolt with the magnetic attraction element extends out of the opening of the screw-in hole by a predetermined distance.
[0012] In one or more embodiments of this application, the magnetic attractor is a magnetic ring.
[0013] In one or more embodiments of this application, the end of the screw hole opposite to the first gear has a countersunk portion, and a sealing ring is fitted on the sealing bolt, with both ends of the sealing ring abutting against the countersunk portion and the nut of the sealing bolt, respectively.
[0014] In one or more embodiments of this application, a contour member is fixedly connected to one end of the first closure member near the gear cavity.
[0015] In one or more embodiments of this application, the end of the first closure member facing away from the contour member has a first scale, and the housing assembly has a second scale. When the first scale is aligned with the second scale and the top of the first closure member is flush with the edge of the insertion hole, the contour member smoothly transitions to the cavity wall of the gear cavity.
[0016] In this embodiment, the gearbox includes a housing assembly and a gear set. The housing assembly includes a front housing and a rear housing. The front housing and the rear housing have concave cavities on opposite sides. The front housing and the rear housing are fixedly connected, and the two concave cavities together form a gear cavity. The cross-section of the cavity wall of the gear cavity is annular racetrack-shaped. The gear set includes a first gear and a second gear. Both the first gear and the second gear are rotatably mounted in the gear cavity. The first gear meshes with the second gear. The middle section of the cavity wall of the gear cavity has two arc-shaped protrusions with opposite orientations. The gear cavity is filled with cooling oil. The two arc-shaped protrusions are located at the top and bottom of the meshing point of the first gear and the second gear, respectively. The height of the cooling oil is lower than the center of the first gear, thereby enabling the cooling oil splashed onto the top wall of the gear cavity to flow to the arc-shaped protrusions and drip onto the meshing point of the first gear and the second gear. Compared with the prior art, this has the advantage of better lubrication. Attached Figure Description
[0017] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein: Figure 1The illustration shows a cross-sectional view of a gearbox according to this application; Figure 2 The figure shows a schematic diagram of the structure of a gearbox according to this application at a certain angle; Figure 3 The diagram shows a structural schematic of a conventional gearbox. Detailed Implementation
[0018] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.
[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0020] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0021] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.
[0022] Schematic gearbox, reference Figures 1 to 2 A gearbox according to any preferred embodiment of the present invention includes a housing assembly 10 and a gear set 20.
[0023] Specifically, such as Figure 2As shown, the housing assembly 10 includes a front housing 101 and a rear housing 102. The front housing 101 and the rear housing 102 have concave cavities on opposite sides. The front housing 101 and the rear housing 102 are fixedly connected, and the two concave cavities together form a gear cavity 103. The cross-section of the cavity wall of the gear cavity 103 is annular racetrack shape. The gear set 20 includes a first gear 201 and a second gear 202. The first gear 201 and the second gear 202 are both rotatably mounted in the gear cavity 103. The first gear 201 meshes with the second gear 202, and the number of teeth of the first gear 201 is less than the number of teeth of the second gear 202.
[0024] It should be noted that the first gear 201 is poweredly connected to the external input shaft, and the second gear 202 is poweredly connected to the external input shaft. The circumferential rotation of the external input shaft is driven and decelerated by the first gear 201 and the second gear 202, so that the circumferential rotation speed of the external output shaft is slower than that of the external input shaft.
[0025] Furthermore, the gear cavity 103 is filled with cooling oil, the height of which is lower than the center of the first gear 201. It should be noted that when the first gear 201 and the second gear 202 rotate circumferentially, the portion of the teeth of the first gear 201 below its meshing point with the second gear 202 is immersed in the cooling oil. As the first gear 201 rotates circumferentially, it meshes with the second gear 202 after completing more than half a revolution, providing lubrication. Additionally, during the rotation of the first gear 201, some of the cooling oil is splashed onto the cavity wall of the gear cavity 103, with some splashing onto the upper cavity wall. In the prior art, the oil drips at any position on the upper cavity wall of the gear cavity 103, rather than concentrated at the meshing point of the first gear 201 and the second gear 202, leaving room for improvement in lubrication and cooling effects.
[0026] Therefore, in this application, as Figure 1As shown, the gear cavity 103 has two arc-shaped protrusions 1031 in the middle section of its cavity wall, with the two arc-shaped protrusions 1031 facing opposite directions. Furthermore, the two arc-shaped protrusions 1031 are located at the top and bottom of the meshing point between the first gear 201 and the second gear 202, respectively. Additionally, one of the arc-shaped protrusions 1031 located above the first gear 201 extends arc-shapedly from the center to both ends of the gear cavity 103. Therefore, when the cooling oil splashes onto the upper cavity wall of the gear cavity 103, the cooling oil easily slides along the arc surface of the arc-shaped protrusion 1031 located above the first gear 201, and drips from the middle section of the arc-shaped protrusion 1031, dripping onto the meshing point between the first gear 201 and the second gear 202. This achieves full utilization of the splashed coolant and has the advantage of better lubrication compared to existing technologies.
[0027] Furthermore, such as Figure 1 As shown, both the first gear 201 and the second gear 202 have a plurality of drainage grooves 2011 arranged in a ring array on their end faces. Both the first gear 201 and the second gear 202 have a mounting hole 2012 at their center. One end of the drainage groove 2011 extends to the mounting hole 2012.
[0028] In addition, such as Figure 1 As shown, one side of the drainage groove 2011 has an extension piece 2013, which is fixedly connected to the first gear 201 or the second gear 202, and one side of the extension piece 2013 extends to the outside of the groove opening of the drainage groove 2011.
[0029] It should be noted that when the first gear 201 or the second gear 202 rotates, and the drainage groove 2011 and the extension plate 2013 are immersed in the cooling oil, the cooling oil entering the drainage groove 2011 will be thrown towards the outer end of the drainage groove 2011 under the action of centrifugal force as the first gear 201 or the second gear 202 rotates circumferentially. After contacting the end wall of the drainage groove 2011, it will be blocked and thrown outward along the extension plate 2013, and a portion of the cooling oil will splash onto the arc-shaped protrusion 1031 located above. The drainage groove 2011 plays the role of accumulating the cooling oil, and the extension plate 2013 provides guidance for the cooling oil on it and flowing out of the drainage groove 2011.
[0030] Furthermore, for example, a metered injection of the cooling oil, such as... Figure 1As shown, one end sidewall of the gear cavity 103 has an abutment plane 1032 and an insertion hole 1033. The gearbox also includes a first sealing member 30, which is threadedly connected to the insertion hole 1033 and seals the insertion hole 1033. The abutment plane 1032 is located directly below the insertion hole 1033 and is covered by the cooling oil.
[0031] It should be noted that the cooling oil is injected into the gear cavity 103 through the insertion hole 1033. After a certain amount of cooling oil is injected, an oil measuring rod can be inserted into the insertion hole 1033 and abut against the first abutting surface 1032. The level of the cooling oil in the gear cavity 103 can be measured according to the height of the oil measuring rod submerged in the cooling oil, thus avoiding the injection of too much cooling oil. At the same time, when periodically testing the quality of the cooling oil, the oil measuring rod can also be inserted into the insertion hole 1033 and abut against the first abutting surface 1032 for trial testing.
[0032] Furthermore, to facilitate the drainage of the cooling oil from the gear cavity 103, such as... Figure 1 As shown, the gearbox includes a screw hole 104 and an oil drain hole 105. The screw hole 104 is located in the middle section of an arc-shaped protrusion 1031 below the first gear 201. The oil drain hole 105 is located on the side of the screw hole 104. The two ends of the oil drain hole 105 are respectively connected to the screw hole 104 and the gear cavity 103. The gearbox also includes a sealing bolt 1041. The sealing bolt 1041 is threadedly connected to the screw hole 104. The end of the sealing bolt 1041 has a magnetic suction member 1042. The magnetic suction member 1042 is fixedly connected to the sealing bolt 1041, and the end of the sealing bolt 1041 with the magnetic suction member 1042 extends out of the opening of the screw hole 104 by a predetermined distance.
[0033] In addition, in this application, the magnetic attractor 1042 is a magnetic ring.
[0034] It should be noted that, under normal conditions, the sealing bolt 1041 seals the screw hole 104; when the screw hole 104 is removed, the cooling oil can be discharged outward along the oil drain hole 105 and the screw hole 104; by providing the magnetic suction member 1042 on the sealing bolt 1041 and positioning the magnetic suction member 1042 below the meshing point of the first gear 201 and the second gear 202, when metal debris is generated during meshing, the metal debris can be attracted by the magnetic suction member 1042, thus preventing it from flowing in the cooling oil and accelerating the wear of the first gear 201 or the second gear 202.
[0035] Furthermore, to improve sealing, such as Figure 1 As shown, the end of the screw hole 104 opposite to the first gear 201 has a countersunk portion 1044, and a sealing ring 1043 is fitted on the sealing bolt 1041. The two ends of the sealing ring 1043 abut against the countersunk portion 1044 and the nut of the sealing bolt 1041, respectively.
[0036] In addition, to achieve a smooth transition of the cavity wall of the gear cavity 103, such as Figure 1 As shown, a contouring member 301 is fixedly connected to one end of the first sealing member 30 near the gear cavity 103, and one end face of the contouring member 301 is an arc surface.
[0037] Furthermore, to facilitate rotating the contouring component 301 to the corresponding position so that the arc surface on the contouring component 301 smoothly transitions with the cavity wall of the gear cavity 103, the end of the first sealing component 30 facing away from the contouring component 301 has a first scale, and the housing assembly 10 has a second scale. When the first scale is aligned with the second scale, and the top of the first sealing component 30 is flush with the opening edge of the insertion hole 1033, the contouring component 301 smoothly transitions with the cavity wall of the gear cavity 103.
[0038] In summary, the gearbox described in the embodiments of this application is illustrated, which provides advantages such as better lubrication for the gearbox.
[0039] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.
Claims
1. A gearbox, comprising a housing assembly and a gear set, the housing assembly comprising a front housing and a rear housing, the front housing and the rear housing having cavities on opposite sides, the front housing and the rear housing being fixedly connected, and the two cavities together forming a gear cavity, the cross-section of the gear cavity wall being an annular racetrack shape, the gear set comprising a first gear and a second gear, the first gear and the second gear being rotatably mounted within the gear cavity, the first gear meshing with the second gear, characterized in that: The gear cavity has two arc-shaped protrusions in the middle section of its cavity wall, with the two arc-shaped protrusions facing opposite directions. The gear cavity is filled with cooling oil. The two arc-shaped protrusions are located at the top and bottom of the meshing point of the first gear and the second gear, respectively. The height of the cooling oil is lower than the center of the first gear.
2. The gearbox according to claim 1, characterized in that: Both the first gear and the second gear have several drainage grooves arranged in a circular array on their end faces. Both the first gear and the second gear have an assembly hole at their center, and one end of each drainage groove extends to the assembly hole.
3. The gearbox according to claim 2, characterized in that: The drainage channel has an extension piece on one side, which is fixedly connected to the first gear or the second gear, and one side of the extension piece extends to the outside of the drainage channel opening.
4. The gearbox according to claim 3, characterized in that: One end sidewall of the gear cavity has an abutment plane and an insertion hole. The gearbox also includes a first sealing member, which is threadedly connected to the insertion hole and seals the insertion hole. The abutment plane is located directly below the insertion hole and is covered by the cooling oil.
5. The gearbox according to claim 4, characterized in that: The gearbox includes a screw-in hole and an oil drain hole. The screw-in hole is located in the middle section of an arc-shaped protrusion below the first gear. The oil drain hole is located on the side of the screw-in hole. The two ends of the oil drain hole are respectively connected to the screw-in hole and the gear cavity. The gearbox also includes a sealing bolt. The sealing bolt is threaded to the screw-in hole. The end of the sealing bolt has a magnetic attraction element. The magnetic attraction element is fixedly connected to the sealing bolt, and the end of the sealing bolt with the magnetic attraction element extends out of the opening of the screw-in hole by a predetermined distance.
6. The gearbox according to claim 5, characterized in that: The magnetic element is a magnetic ring.
7. The gearbox according to claim 5, characterized in that: The end of the screw hole opposite to the first gear has a countersunk portion, and a sealing ring is fitted on the sealing bolt. The two ends of the sealing ring abut against the countersunk portion and the nut of the sealing bolt, respectively.
8. The gearbox according to claim 7, characterized in that: A contoured part is fixedly connected to one end of the first sealing member near the gear cavity.
9. The gearbox according to claim 8, characterized in that: The first closure has a first scale at the end opposite to the profile member, and the housing assembly has a second scale. When the first scale is aligned with the second scale and the top of the first closure is flush with the edge of the insertion hole, the profile member smoothly transitions to the cavity wall of the gear cavity.