Fully-lubricated PTO gear box
The combination of the oil-slinging pan and the main oil channel and the multi-path lubrication channel design solves the problems of difficult lubrication and poor heat dissipation of the PTO gearbox, achieves balanced distribution and rapid exchange of lubricating fluid, and improves the heat dissipation efficiency and reliability of the gearbox.
Patent Information
- Application Number
- CN202510957331.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-11
- Publication Date
- 2025-09-19
AI Technical Summary
The existing PTO gearbox has problems such as difficulty in lubrication, high heat generation of bearings causing easy damage to oil seals, and easy deposition of lubricating oil at high temperatures, resulting in poor heat dissipation, which leads to local overheating of the gearbox, aging of seals and oil leakage.
The oil slinger is used in conjunction with the main oil channel, and the Bernoulli principle is used to circulate the lubricating oil in the gearbox. The multi-path lubrication channel and labyrinth oil seal seat design achieves balanced distribution and rapid exchange of lubricating fluid, thereby reducing the gearbox temperature.
It improves the heat dissipation efficiency and lubrication effect of the gearbox, extends its service life, reduces the risk of seal aging and oil leakage, and improves operational stability and reliability.
Smart Images
Figure CN120667525A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of transmission devices, and in particular to a fully lubricated PTO gearbox. Background Art
[0002] Currently, in the power systems of agricultural tractors and harvesters, the PTO gearbox connecting the engine and transmission components plays the role of distributing power, distributing the engine power to drive units such as generators, hydraulic pumps, and drive shafts as needed.
[0003] To improve reliability and reduce costs, this type of gearbox generally has a relatively simple structure, basically using oil immersion lubrication, and no additional cooling system is designed. However, since the gearbox is usually directly connected to the engine and is located behind the engine, the high temperature of the engine surface causes the air temperature to reach 60-70°C, which also has an adverse effect on the heat dissipation of the gearbox itself.
[0004] This type of gearbox basically adopts a cast iron housing and alloy steel gear structure, with a skeleton oil seal as the seal. The heat dissipation efficiency relies entirely on the heat exchange of its own surface. When the ambient temperature itself is high, it is easy to cause heat accumulation and generate high temperature, which will eventually damage the rubber seal.
[0005] However, the existing gearbox has the following defects: the current PTO gearbox has the problem of difficulty in lubricating the input and output gears, the bearings heat up a lot, which makes the oil seals easily damaged, and due to thermal expansion and contraction, low-temperature lubricating oil is easy to deposit at the bottom, and high-temperature lubricating oil is easy to accumulate on the upper layer, which cannot be exchanged quickly, resulting in reduced lubrication effect and excessively high local temperature of the gearbox, thereby causing problems such as lubricating oil deterioration, oil seal leakage, and premature failure of gears or bearings. If additional components such as a heat pump are added, the mechanism will be complicated and the cost will increase. In addition, rubber seals are unstable at high temperatures, and are very prone to aging and deformation, which can also easily lead to oil leakage. Summary of the Invention
[0006] One object of the present application is to provide a fully lubricated PTO gearbox with good heat dissipation and lubrication effects.
[0007] In order to achieve the above purpose, the technical solution adopted in this application is: a fully lubricated PTO gearbox, comprising a main housing and an input shaft, the input shaft passing through the main housing, the main housing being provided with an oil delivery portion along the circumference of the input shaft, the oil delivery portion being provided with an open main oil channel along the circumference of the input shaft, the lower portion of the oil delivery portion being provided with an oil inlet connected to the main oil channel, the upper portion of the oil delivery portion being provided with an oil outlet connected to the main oil channel, an oil flinger plate being coaxially provided on the input shaft, the oil flinger plate being suitable for rotating with the input shaft, the oil flinger plate being suitable for covering the open side of the main oil channel, and being suitable for clearance fit with the oil delivery portion on one side or both sides of the main oil channel.
[0008] In some embodiments, the main housing is provided with a plurality of oil collecting channels and a plurality of axial holes, the first end of the oil collecting channel is located above the axial hole and faces the oil outlet, and the second end of the oil collecting channel is connected to the axial hole.
[0009] In some embodiments, an oil seal seat is provided at the shaft hole, the oil seal seat is suitable for passing through the shaft body, an external oil channel is formed between the oil seal seat and the main shell, an internal oil channel is formed between the oil seal seat and the shaft body, the oil collecting channel is connected to the external oil channel, a skeleton oil seal is provided in the internal oil channel, and a transmission hole is provided on the oil seal seat to connect the external oil channel and the internal oil channel.
[0010] In some embodiments, the shaft hole is provided with a bearing inside the oil seal seat, the inner side of the inner oil channel is connected to the bearing, and the bearing is provided with an oil unloading groove connecting the inner oil channel and the internal chamber of the main housing.
[0011] In some embodiments, the number of the transmission holes is one or more, and the transmission holes are located in the upper middle portion of the oil seal seat.
[0012] In some embodiments, the height of the first end of the oil collecting channel is higher than the height of the second end, and the second end of the oil collecting channel is connected to the upper part of the axial hole; the number of the oil collecting channels is greater than the number of the axial holes, and one or more oil collecting channels are arranged corresponding to one axial hole; when an even number of oil collecting channels are arranged corresponding to one axial hole, the oil collecting channels are symmetrical along the vertical center axis of the axial hole.
[0013] In some embodiments, an oil baffle is provided on the upper portion of the shaft hole, and the oil baffle and the first end of the oil collecting channel are adapted to cooperate to form an oil receiving groove, and the oil receiving groove is adapted to receive the oil flowing out of the oil outlet.
[0014] In some embodiments, the oil slinger plate forms a uniform surface clearance fit with the oil delivery portion on one side or both sides of the main oil channel; and at least one connecting channel is provided on the oil slinger plate along the axial direction of the input shaft.
[0015] In some embodiments, the oil inlet is connected to the non-open side of the main oil channel; the oil inlet is located at the bottom of the oil delivery part, the lowest point of the bottom of the main shell is arranged directly below the oil inlet away from one end of the main oil channel, and an oil drain structure is provided; the oil outlet is located at the top of the oil delivery part, one side or both sides of the top of the oil delivery part are connected to the internal chamber of the main shell, and the oil outlet is an open structure on the corresponding side of the oil delivery part where the internal chamber of the main shell is connected; the opening direction of the oil outlet includes at least the horizontal direction.
[0016] In some embodiments, a transmission gear and a bearing are provided on the input shaft, and the input shaft is connected to the main housing through the bearing. The oil slingering plate is arranged between the transmission gear and the bearing. The transmission gear and the bearing are suitable for cooperating to limit the axial movement of the oil slingering plate along the input shaft. The transmission connection side of the transmission gear and the side of the bearing limited by the main housing are both the side away from the oil slingering plate.
[0017] Compared with the prior art, the present invention has the following advantages: 1. The gearbox of the present application utilizes the Bernoulli principle to allow the oil inlet to absorb the low-temperature lubricating oil at the bottom of the gearbox through the relative rotation between the oil-slinging plate and the main oil channel, and discharge it from the top of the gearbox through the main oil channel, thereby balancing the overall temperature of the gearbox, reducing the extreme temperature of the gearbox, and improving the heat dissipation efficiency of the gearbox, thereby improving operational stability and service life, and reducing the rate of deterioration of the lubricating oil and aging of rubber seals.
[0018] 2. The gearbox of the present application is provided with multiple lubrication channels to circulate lubrication to the bearings, and is designed with a labyrinth oil seal seat. The lubricating fluid is divided into two parts by using the outer oil channel and the inner oil channel and the oil is exchanged. The outer oil channel can quickly transfer heat to the newly added gear oil with a lower temperature, thereby effectively reducing the temperature of the oil seal seat and protecting the skeleton oil seal inside the inner oil channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a view of the internal structure according to a preferred embodiment of the present application.
[0020] Figure 2 This is a main view of a preferred embodiment of the present application.
[0021] Figure 3 According to a preferred embodiment of the present application Figure 2 Section view along AA direction.
[0022] Figure 4 According to a preferred embodiment of the present application Figure 3Magnified view at point a.
[0023] Figure 5 It is a right view of a preferred embodiment according to the present application.
[0024] Figure 6 According to a preferred embodiment of the present application Figure 5 Cross-sectional view along the BB direction.
[0025] Figure 7 It is a schematic diagram of the connection between the oil collecting channel and the shaft hole according to a preferred embodiment of the present application.
[0026] Figure 8 It is a schematic diagram of the connection between the oil collecting channel and the internal chamber of the main shell according to a preferred embodiment of the present application.
[0027] Figure 9 It is a schematic diagram of the layout of the oil collecting channel according to a preferred embodiment of the present application.
[0028] In the figure: 1. Main housing; 11. Oil delivery part; 111. Main oil channel; 112. Oil inlet; 113. Oil outlet; 12. Oil drain structure; 13. Oil collecting channel; 131. First end; 132. Second end; 14. Shaft hole; 2. Input shaft; 3. Oil slinger; 31. Connecting channel; 4. Transmission gear; 5. Bearing; 51. Oil unloading tank; 6. Oil seal seat; 61. External oil channel; 62. Internal oil channel; 63. Transmission hole; 7. Skeleton oil seal; 8. Oil baffle; 81. Oil collecting tank. DETAILED DESCRIPTION
[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0030] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.
[0031] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0032] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.
[0033] The present application will be further described below with reference to the accompanying drawings: like Figures 1 to 9 As shown, the present application provides a fully lubricated PTO gearbox, including a main housing 1 and an input shaft 2, the input shaft 2 passes through the main housing 1, the main housing 1 is provided with an oil delivery portion 11 along the circumference of the input shaft 2, the oil delivery portion 11 is provided with an open main oil channel 111 along the circumference of the input shaft 2, the lower part of the oil delivery portion 11 is provided with an oil inlet 112 connected to the main oil channel 111, the upper part of the oil delivery portion 11 is provided with an oil outlet 113 connected to the main oil channel 111, an oil flinger 3 is coaxially provided on the input shaft 2, the oil flinger 3 is suitable for rotating with the input shaft 2, the oil flinger 3 is suitable for covering the open side of the main oil channel 111, and is suitable for clearance fit with the oil delivery portion 11 on one side or both sides of the main oil channel 111.
[0034] The present application cooperates with the oil-slinging plate 3 and the open main oil channel 111, and utilizes the relative movement between the oil-slinging plate 3 and the main oil channel 111. Under the dual effects of the oil surface adsorption force and the Bernoulli force, the flow of the lubricating oil in the main oil channel 111 is affected, thereby affecting the state of the lubricating oil in the entire gear box, and transferring the lubricating oil with a lower temperature at the bottom of the gear box to the top of the gear box for discharge, and allowing the lubricating oil with a higher temperature at the top of the gear box to flow to the bottom of the gear box, thereby balancing the overall temperature of the gear box, reducing the extreme temperature of the gear box, and improving the heat dissipation efficiency of the gear box. The present application has high reliability and low cost.
[0035] In some embodiments, the oil-slinging plate 3 and the oil delivery portion 11 are configured with an equidistant clearance fit, which can reduce the change in liquid resistance between the oil-slinging plate 3 and the oil delivery portion 11, thereby improving the rotational stability of the oil-slinging plate 3, thereby reducing the impact on the rotation of the input shaft 2 and improving the stability of the gearbox operation.
[0036] like Figure 3 In the embodiment shown, the oil-slinging pan 3 forms a uniform surface clearance fit with the oil delivery portion 11 on one side or both sides of the main oil channel 111. The surface clearance fit can increase the adsorption force of the oil-slinging pan 3 on the lubricating oil and enhance the effect of the Bernoulli force, so that the efficiency of the oil-slinging pan 3 in delivering oil can be improved, thereby being able to more balance the overall temperature of the gearbox and improve the heat dissipation efficiency.
[0037] It is worth noting that the uniform surface clearance fit includes uniform spacing between various positions of the surface clearance fit and uniform width of the surface clearance fit formed between the oil slinger pan 3 and the oil delivery portion 11 at various locations.
[0038] In some embodiments, the size of the gap between the oil-slinging plate 3 and the main oil channel 111 can be set according to the viscosity of the lubricating oil. If the viscosity of the lubricating oil is large, the gap width can be appropriately increased. If the viscosity of the lubricating oil is small, the gap width can be appropriately reduced to ensure the efficiency of the oil-slinging plate 3 in transporting oil.
[0039] like Figure 3 In the embodiment shown, the oil-slinging plate 3 and the oil delivery parts 11 on both sides of the main oil channel 111 form a uniform surface clearance fit, which can enable the oil-slinging plate 3 and the oil delivery parts 11 on both sides of the main oil channel 111 to produce a conveying effect, thereby achieving the maximum effect of driving the flow of oil and improving the conveying efficiency.
[0040] like Figure 3 In the embodiment shown, the oil-slinging pan 3 cooperates with the oil delivery portion 11 at its outer peripheral side. At the same rotational speed of the input shaft 2, the further outward the oil-slinging pan 3 is, the faster the relative movement between the oil-slinging pan 3 and the oil delivery portion 11 is. Correspondingly, the faster the oil is driven, which can effectively improve the efficiency of oil circulation exchange in a limited space.
[0041] It is worth noting that the depth of the main oil channel 111 (which can also be understood as the size of the chamber formed between the main oil channel 111 and the oil-slinging plate 3), the width of the main oil channel 111 and the shape of the main oil channel 111 can also affect the oil delivery flow efficiency. Therefore, in actual use, the depth, width and shape of the main oil channel 111 can be adjusted through design to further optimize the heat dissipation effect. In this application, the shape of the main oil channel 111 is set to a circular ring shape with a rectangular cross-section.
[0042] like Figure 1 In the embodiment shown, at least one connecting channel 31 is provided on the oil slinger pan 3 along the axial direction of the input shaft 2. The connecting channel 31 enables the oil to pass through the oil slinger pan 3, so that the oil on both sides of the oil slinger pan 3 can be exchanged, and the oil slinger pan 3 can reduce the interference with the oil flow, reduce the influence and obstruction of the oil slinger pan 3 itself on the oil circulation, improve the oil operation efficiency, and achieve lightweight and reduce the weight of the gearbox.
[0043] In some embodiments, there are multiple connecting channels 31, which are symmetrical along the axis of the oil slinger plate 3 and are arranged at equal intervals along the circumference of the oil slinger plate 3. This can balance the weight of the oil slinger plate 3, improve the rotational stability of the oil slinger plate 3, reduce shaking, and thereby reduce the impact on the rotation of the input shaft 2.
[0044] like Figure 1 and 3In the embodiment shown, the oil inlet 112 is connected to the non-open side of the main oil channel 111, so that a closed connection is formed between the oil inlet 112 and the main oil channel 111, reducing the interference of oil leakage on the open side of the main oil channel 111 on the oil inlet state of the oil inlet 112. When the oil-slinging pan 3 drives the oil, the oil in the oil inlet 112 can more efficiently and stably follow the oil brought out of the main oil channel 111 to separate from the oil inlet 112, thereby realizing the extraction of oil from the bottom of the gear box.
[0045] like Figure 1 and 3 In the embodiment shown, the oil inlet 112 is located at the bottom of the oil delivery portion 11, so that the low-temperature oil at the bottom of the gearbox can be contacted and extracted as much as possible, the overall temperature of the oil in the gearbox is balanced, and the occurrence of stratification of low-temperature oil and high-temperature oil is reduced.
[0046] like Figure 1 and 3 In the illustrated embodiment, the oil inlet 112 is arranged in a vertical direction, which improves the oil intake efficiency and can increase the circulation speed.
[0047] like Figure 1 and 3 In the embodiment shown, the lowest point of the bottom of the main housing 1 is arranged directly below the oil inlet 112 away from one end of the main oil channel 111, and an oil drain structure 12 is provided. This design can more conveniently and efficiently discharge all the oil in the main housing 1 and all the oil in the main oil channel 111, thereby improving the efficiency of gearbox maintenance and oil replacement.
[0048] In some embodiments, the oil drain structure 12 includes an oil drain bolt, which makes it convenient and quick to drain the oil from the gearbox.
[0049] like Figure 1 and 3 In the illustrated embodiment, the oil outlet 113 is located at the top of the oil delivery portion 11 , so that the low-temperature oil can diffuse from the top of the gearbox to evenly temperature and cool the upper portion of the gearbox.
[0050] In some embodiments, one side or both sides of the top of the oil delivery part 11 are connected to the internal chamber of the main shell 1. It can be understood that one side or both sides of the oil delivery part 11 are not blocked by the main shell 1 or other structures, and one side or both sides of the oil delivery part 11 can be in direct contact with the internal chamber of the main shell 1 for containing oil. At this time, the oil outlet 113 is set to an open structure on the corresponding side of the oil delivery part 11 connected to the internal chamber of the main shell 1, which can allow the low-temperature oil to diffuse quickly into the internal chamber, thereby improving the efficiency of temperature equalization and cooling.
[0051] like Figure 3 and 6In the embodiment shown, the left side of the top of the oil delivery part 11 is connected to the internal chamber of the main shell 1, and the right side is connected to the side wall of the main shell 1. The oil outlet 113 is set as an open structure on the left side of the top of the oil delivery part 11. The low-temperature oil can diffuse and drain to the left side, and the internal chamber of the main shell 1 can be evenly heated and cooled.
[0052] like Figure 3 In the embodiment shown, when the gearbox is placed horizontally, the input shaft 2 is arranged on the gearbox in the horizontal direction, the oil-slinging plate 3 is located in the vertical plane, and the opening direction of the oil outlet 113 includes at least the horizontal direction, so that the oil discharged from the oil outlet 113 can flow and spread farther, establish a larger range of flow circulation, and enable oil exchange to occur in various places in the gearbox as much as possible, thereby achieving efficient uniform temperature and heat dissipation.
[0053] like Figure 3 and 6 In the embodiment shown, a transmission gear 4 and a bearing 5 are provided on the input shaft 2. The input shaft 2 is connected to the main housing 1 through the bearing 5. The oil slingering pan 3 is arranged between the transmission gear 4 and the bearing 5. The transmission gear 4 and the bearing 5 are suitable for cooperating to limit the axial movement of the oil slingering pan 3 along the input shaft 2. The transmission connection side of the transmission gear 4 and the side of the bearing 5 limited by the main housing 1 are both the side away from the oil slingering pan 3. It can be understood that the transmission gear 4 can use its transmission connection side to achieve stable limitation of the oil slingering pan 3, and the bearing 5 can use its side limited by the main housing 1 to achieve stable limitation of the oil slingering pan 3. The cooperation between the two can improve the rotational stability of the oil slingering pan 3, reduce the shaking of the oil slingering pan 3, and thereby ensure the rotational stability of the input shaft 2. In addition, it can also improve the overall structural compactness and make the layout more convenient.
[0054] like Figures 7 to 9 In the embodiment shown, a plurality of oil collecting channels 13 and a plurality of axial holes 14 are provided on the main shell 1. The first end 131 of the oil collecting channel 13 is located at the upper part of the axial hole 14 and faces the oil outlet 113. The second end 132 of the oil collecting channel 13 is connected to the axial hole 14. The oil collecting channel 13 can receive the low-temperature oil flowing and diffused from the oil outlet 113, and drain the low-temperature oil to the axial hole 14 to achieve heat dissipation and cooling of the axial hole 14. In this application, one axial hole 14 is usually arranged with at least one oil collecting channel 13 to achieve heat dissipation and cooling of each axial hole 14.
[0055] like Figure 1 、 3In the embodiments shown in , 4, and 6, an oil seal seat 6 is provided at the shaft hole 14, and the oil seal seat 6 is suitable for passing through the shaft body (including but not limited to the input shaft 2), and an outer oil passage 61 is suitable for forming between the oil seal seat 6 and the main housing 1, and an inner oil passage 62 is suitable for forming between the oil seal seat 6 and the shaft body, the oil collecting channel 13 is connected to the outer oil passage 61, and the inner oil passage 62 is provided with a skeleton oil seal 7, and a transmission hole 63 is provided on the oil seal seat 6 to connect the outer oil passage 61 and the inner oil passage 62.
[0056] It can be understood that the low-temperature oil received and drained by the oil collecting channel 13 can enter the outer oil channel 61 for storage and collection. These low-temperature oils can lower the temperature of the oil seal seat 6, protect the skeleton oil seal 7, and reduce the probability of aging of the skeleton oil seal 7 due to excessive temperature. After the low-temperature oil stored in the outer oil channel 61 reaches a certain amount, the oil can be discharged to the inner oil channel 62 through the transmission hole 63.
[0057] In some embodiments, the molding volume of the outer oil channel 61 can be appropriately expanded to store and collect more low-temperature oil, thereby achieving a better cooling effect on the oil seal seat 6 and the skeleton oil seal 7.
[0058] like Figure 1 、 3 In the embodiment shown in FIG4 , a bearing 5 is provided on the inner side of the oil seal seat 6 of the shaft hole 14 , the inner side of the inner oil passage 62 is connected to the bearing 5 , and an oil unloading groove 51 is provided on the bearing 5 to connect the inner oil passage 62 and the internal chamber of the main housing 1 .
[0059] It can be understood that the oil discharged from the outer oil channel 61 to the inner oil channel 62 through the transmission hole 63 can lubricate the bearing 5, and the excess oil can be discharged from the oil unloading groove 51 on the bearing 5 to the internal chamber of the main housing 1, thereby realizing oil exchange and circulation.
[0060] In some embodiments, the number of the transmission holes 63 is one or more, and the transmission holes 63 are located in the upper middle part of the oil seal seat 6. The outer oil channel 61 can store low-temperature oil in the space below the transmission hole 63 to prevent the oil from flowing directly into the inner oil channel 62, thereby ensuring that the low-temperature oil can stay in the outer oil channel 61 for a long enough time to dissipate heat.
[0061] like Figure 6 In the embodiment shown, there are two transmission holes 63, which are symmetrically arranged in the middle of the oil seal seat 6 to balance the oil storage volume, storage uniformity and oil discharge speed of the external oil channel 61, so as to achieve the best heat dissipation effect as possible.
[0062] like Figures 7 to 8In the embodiment shown, the height of the first end 131 of the oil collecting channel 13 is higher than the height of the second end 132, and the second end 132 of the oil collecting channel 13 is connected to the upper part of the shaft hole 14. The height difference between the first end 131 and the second end 132 of the oil collecting channel 13 and the shaft hole 14 is designed to guide the low-temperature oil entering the oil collecting channel 13 to automatically flow to the shaft hole 14, thereby achieving cooling and heat dissipation near the shaft hole 14.
[0063] In some embodiments, the opening size of the first end 131 of the oil collecting channel 13 is larger than the opening size of the second end 132 , which can achieve a better oil collecting and receiving effect.
[0064] In some embodiments, the number of the oil collecting channels 13 is greater than the number of the shaft holes 14 , and one or more oil collecting channels 13 are arranged corresponding to one shaft hole 14 to ensure the heat dissipation effect at the shaft hole 14 .
[0065] like Figure 9 In the embodiment shown, when an even number of oil collecting channels 13 are arranged corresponding to one shaft hole 14, the oil collecting channels 13 are symmetrical along the vertical center axis of the shaft hole 14, and the oil diffused to both sides of the shaft hole 14 can enter evenly, thereby improving the overall temperature uniformity of the oil in the gearbox.
[0066] like Figure 1 、 3 In the embodiments shown in 7 to 9, an oil baffle plate 8 is provided on the upper portion of the shaft hole 14, and the oil baffle plate 8 and the first end 131 of the oil collecting channel 13 are adapted to cooperate to form an oil receiving groove 81, and the oil receiving groove 81 is adapted to receive the oil flowing out and diffused at the oil outlet 113.
[0067] In some embodiments, the oil baffle 8 and the main shell 1 are detachably connected to facilitate disassembly and maintenance. At the same time, oil baffles 8 of different specifications and shapes can be set according to needs to help the oil collection channel 13 achieve oil collection states of different efficiencies.
[0068] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and the specification only describe the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application to be protected, and the scope of protection claimed by the present application is defined by the attached claims and their equivalents.
Claims
1. A fully lubricated PTO gearbox, characterized by: The oil pump comprises a main housing and an input shaft, wherein the input shaft passes through the main housing, and the main housing is provided with an oil delivery portion along the circumference of the input shaft, and the oil delivery portion is provided with an open main oil passage along the circumference of the input shaft, and the lower portion of the oil delivery portion is provided with an oil inlet connected to the main oil passage, and the upper portion of the oil delivery portion is provided with an oil outlet connected to the main oil passage, and an oil slinger is coaxially provided on the input shaft, and the oil slinger is suitable for rotating with the input shaft, and the oil slinger is suitable for covering the open side of the main oil passage, and is suitable for clearance fit with the oil delivery portion on one side or both sides of the main oil passage.
2. A fully lubricated PTO gearbox according to claim 1, characterized in that: The main housing is provided with a plurality of oil collecting channels and a plurality of shaft holes. The first end of the oil collecting channel is located above the shaft hole and faces the oil outlet. The second end of the oil collecting channel is connected to the shaft hole.
3. A fully lubricated PTO gearbox according to claim 2, characterized in that: An oil seal seat is provided at the shaft hole, and the oil seal seat is suitable for passing the shaft body. An external oil channel is formed between the oil seal seat and the main shell, and an internal oil channel is formed between the oil seal seat and the shaft body. The oil collecting channel is connected to the external oil channel, and a skeleton oil seal is provided in the internal oil channel. A transmission hole is provided on the oil seal seat to connect the external oil channel and the internal oil channel.
4. A fully lubricated PTO gearbox according to claim 3, characterized in that: The shaft hole is provided with a bearing inside the oil seal seat, the inner side of the inner oil passage is connected to the bearing, and the bearing is provided with an oil discharge groove connecting the inner oil passage and the internal chamber of the main housing.
5. A fully lubricated PTO gearbox according to claim 3, characterized in that: The number of the transmission holes is one or more, and the transmission holes are located in the upper middle portion of the oil seal seat.
6. A fully lubricated PTO gearbox according to claim 2, characterized in that: The height of the first end of the oil collecting channel is higher than the height of the second end, and the second end of the oil collecting channel is connected to the upper part of the axial hole; the number of the oil collecting channels is greater than the number of the axial holes, and one or more oil collecting channels are arranged corresponding to one axial hole; when an even number of oil collecting channels are arranged corresponding to one axial hole, the oil collecting channels are symmetrical along the vertical center axis of the axial hole.
7. A fully lubricated PTO gearbox according to claim 2, characterized in that: An oil baffle is provided on the upper portion of the shaft hole, and the oil baffle and the first end of the oil collecting channel are adapted to cooperate to form an oil receiving groove, and the oil receiving groove is adapted to receive the oil flowing out of the oil outlet.
8. The fully lubricated PTO gearbox according to claim 1, characterized in that: The oil-slinging plate forms a uniform surface clearance fit with the oil delivery portion on one side or both sides of the main oil channel; and at least one connecting channel is provided on the oil-slinging plate along the axial direction of the input shaft.
9. The fully lubricated PTO gearbox according to claim 1, characterized in that: The oil inlet is communicated with the non-open side of the main oil channel; the oil inlet is located at the bottom of the oil delivery part, the lowest point of the bottom of the main shell is arranged directly below the oil inlet away from the end of the main oil channel, and an oil drain structure is provided; the oil outlet is located at the top of the oil delivery part, one side or both sides of the top of the oil delivery part are connected to the internal chamber of the main shell, and the oil outlet is an open structure on the corresponding side of the oil delivery part where the internal chamber of the main shell is connected; the opening direction of the oil outlet includes at least the horizontal direction.
10. The fully lubricated PTO gearbox according to claim 1, characterized in that: A transmission gear and a bearing are provided on the input shaft, and the input shaft is connected to the main housing through the bearing. The oil slinger is arranged between the transmission gear and the bearing. The transmission gear and the bearing are suitable for cooperating to limit the axial movement of the oil slinger along the input shaft. The transmission connection side of the transmission gear and the side of the bearing limited by the main housing are both away from the oil slinger.