Gear

Abstract

The utility model relates to the technical field of planetary reducers, in particular to a gear which comprises a gear body, a through groove is coaxially formed in the gear body and used for allowing a bearing to be embedded, an oil guide groove is formed in the outer wall of the gear body and communicates with the through groove, and the included angle between the length direction of the oil guide groove and the radial direction of the gear body is an acute angle. The gear body is coaxially provided with the through groove, the through groove is used for embedding a bearing, the oil guide groove is formed in the outer wall of the gear body, and the oil guide groove is communicated with the through groove, so that lubricating oil can smoothly flow into the through groove from the oil guide groove, and a needle bearing is effectively lubricated; lubricating oil can be thrown into the oil guide grooves more easily in the rotating process of the gear and flows to the through grooves along the oil guide grooves, the flowability and the lubricating effect of the lubricating oil are improved, friction between the gear and a bearing is reduced, and the service life of the planetary reducer is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of planetary reducer, and particularly relates to a gear. BACKGROUND

[0002] The planetary reducer has the characteristics of light weight, large transmission ratio, large carrying capacity, high efficiency, stable operation, low noise and strong adaptability, and is widely applied to the industrial departments such as metallurgy, mine, hoisting and transportation, electric power, energy, building materials, light industry and transportation.

[0003] At present, the planetary gear transmission assembly of the planetary reducer is lubricated by being filled with lubricating oil during assembly. However, when the planetary reducer is assembled, the end faces of the planetary gears are respectively attached to the planet carrier and the end cover. When the reducer operates, the end faces of the planetary gears are directly and purely slidingly rubbed against the side faces of the planet carrier and the end cover. The planetary gears are connected to the planet carrier through needle bearings. It is difficult for the lubricating oil to enter the inside of the planetary gears to lubricate the needle bearings, so that the internal friction of the reducer is increased, the transmission efficiency of the planetary reducer is reduced, serious local heating is caused, and the planetary gears are expanded and stuck or appear gluing, which leads to failure or damage of the planetary gears, and seriously affects the overall performance and service life of the planetary reducer. CONTENT OF THE UTILITY MODEL

[0004] In order to lubricate the needle bearings inside the planetary gears and improve the service life of the planetary reducer, the present application provides a gear.

[0005] The present application provides a gear adopting the following technical scheme:

[0006] The gear comprises a gear body, the gear body is coaxially provided with a through groove, the through groove is used for embedding a bearing, an oil guide groove is arranged at the outer wall of the gear body, the oil guide groove is communicated with the through groove, and the included angle between the length direction of the oil guide groove and the radial direction of the gear body is an acute angle.

[0007] By adopting the above technical scheme, the gear body is coaxially provided with the through groove, the through groove is used for embedding the bearing, the oil guide groove is arranged at the outer wall of the gear body, the oil guide groove is communicated with the through groove, so that the lubricating oil can flow smoothly from the oil guide groove into the through groove, thereby effectively lubricating the needle bearings. The included angle between the length direction of the oil guide groove and the radial direction of the gear body is an acute angle, so that the lubricating oil can be more easily thrown into the oil guide groove during the rotation of the gear, and flow to the through groove along the oil guide groove, the flowability and lubricating effect of the lubricating oil are improved, the friction between the gear and the bearing is reduced, and the service life of the planetary reducer is improved.

[0008] Preferably, the oil guide groove is in an arc shape.

[0009] By adopting the technical scheme, the oil guide groove is designed in an arc shape, so that the lubricating oil can flow more smoothly along the oil guide groove to the needle bearing, the flowability and lubricating effect of the lubricating oil are improved, the friction between the gear and the bearing is reduced, and the transmission efficiency and overall performance of the planetary reducer are improved.

[0010] Preferably, the gear body is provided with an annular groove at the outer periphery of both ends along the gear body axis direction, and the oil guide groove is located at the annular groove wall away from the through groove.

[0011] By adopting the technical scheme, the gear body is provided with an annular groove at the outer periphery of both ends along the gear body axis direction, and the oil guide groove is located at the annular groove wall away from the through groove, which can effectively guide the lubricating oil from the annular groove to the oil guide groove, fully lubricate the bearing, reduce the friction between the planetary gear and the bearing, improve the transmission efficiency of the planetary reducer, and improve the service life of the planetary reducer.

[0012] Preferably, the side surface of the oil guide groove away from the other annular groove penetrates the gear body.

[0013] By adopting the technical scheme, the side surface of the oil guide groove away from the other annular groove penetrates the gear body, which facilitates the processing of the oil guide groove and reduces the production cost of the gear.

[0014] Preferably, a plurality of oil guide grooves are provided, and the plurality of oil guide grooves are distributed circumferentially and spaced apart around the gear body axis.

[0015] By adopting the technical scheme, the plurality of oil guide grooves are distributed circumferentially and spaced apart around the gear body axis, so that the lubricating oil can flow more smoothly into the inside of the planetary gear to lubricate the bearing and reduce the lubrication between the gear body and the bearing, thereby improving the transmission efficiency of the planetary reducer.

[0016] Preferably, one annular groove corresponds to three oil guide grooves, and the three oil guide grooves are uniformly distributed circumferentially around the gear body axis.

[0017] By adopting the technical scheme, the three oil guide grooves are uniformly distributed circumferentially around the gear body axis, so that the lubricating oil on the outside of the gear body can uniformly pass through the oil guide groove into the through groove to lubricate the bearing and reduce the lubrication between the gear body and the bearing, thereby improving the transmission efficiency of the planetary reducer.

[0018] Preferably, the distance between the two side walls of the oil guide groove perpendicular to the length direction of the oil guide groove gradually decreases towards the through groove along the length direction of the oil guide groove.

[0019] By adopting the technical scheme, the interval between the two side walls of the oil guide groove in the direction perpendicular to the length direction of the oil guide groove is tapered to the side close to the through groove in the length direction of the oil guide groove, so that the cross section of the oil guide groove close to the through groove is larger than that of the oil guide groove away from the through groove, the pressure of the lubricating oil in the oil guide groove gradually increases close to the through groove, and the lubricating oil is sprayed to the bearing.

[0020] Preferably, the end of the oil guide groove wall close to the through groove is tangent to the through groove in the radial direction.

[0021] By adopting the technical scheme, the lubricating oil smoothly enters the inside of the planetary gear, lubricates the bearing, reduces the lubrication between the gear body and the bearing, and improves the service life of the planetary reducer.

[0022] Preferably, the wall of the oil guide groove away from the through groove is provided with a fillet.

[0023] By adopting the technical scheme, the wall of the oil guide groove away from the through groove is provided with a fillet, reducing the stress concentration phenomenon of the oil guide groove wall, reducing the possibility of damage to the gear body, improving the service life of the gear body, and further improving the service life of the planetary reducer.

[0024] Preferably, the wall of the through groove away from the oil guide groove is provided with a chamfer.

[0025] By adopting the technical scheme, the chamfer is used to abut the end of the bearing, plays a guiding role in the installation of the gear body, and improves the assembly efficiency of the planetary reducer.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The gear body is coaxially provided with a through groove for embedding a bearing, and an oil guide groove is arranged on the outer wall of the gear body, the oil guide groove being communicated with the through groove, so that the lubricating oil can smoothly flow into the through groove from the oil guide groove, thereby effectively lubricating the needle bearing. The included angle between the length direction of the oil guide groove and the radial direction of the gear body is an acute angle, so that the lubricating oil can be more easily thrown into the oil guide groove during rotation of the gear, and flow to the through groove along the oil guide groove, improving the flowability and lubricating effect of the lubricating oil, reducing the friction between the gear and the bearing, and improving the service life of the planetary reducer.

[0028] 2. The surface of the oil guide groove away from the other annular groove penetrates the gear body, facilitating the processing of the oil guide groove and reducing the production cost of the gear.

[0029] 3. The spacing between the two side walls of the oil guide groove in the direction perpendicular to the length direction of the oil guide groove is tapered towards the side close to the through groove in the length direction of the oil guide groove, so that the cross section of the oil guide groove close to the through groove is larger than that of the oil guide groove away from the through groove, so that the pressure of the lubricating oil in the oil guide groove gradually increases close to the through groove, which helps the lubricating oil to be sprayed to the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a sectional view of Example 1.

[0031] Figure 2 is a structural schematic view of Example 1.

[0032] Figure 3 is a sectional view of Example 2.

[0033] Figure 4 is a structural schematic view of Example 3.

[0034] Figure 5 is a partial sectional view of Example 3.

[0035] REFERENCE SIGNS:

[0036] 1, gear body; 11, through groove; 12, oil guide groove; 13, ring groove; 14, round corner; 15, chamfer; 16, oil storage groove; 17, connecting groove; 18, first sliding groove; 19, containing groove; 110, second sliding groove; 111, third sliding groove; 112, mounting groove;

[0037] 2, lubricating assembly; 21, sliding block; 22, reset member; 23, heat expansion block; 24, connecting block; 25, abutting block. DETAILED DESCRIPTION

[0038] The application will be further described in detail below with reference to the accompanying drawings.

[0039] The application discloses a gear.

[0040] Example 1

[0041] Referring to Figure 1 A gear includes a gear body 1, the gear body 1 is coaxially provided with a through groove 11, the through groove 11 is used for embedding a bearing. The gear body 1 is respectively provided with a ring groove 13 at the outer periphery of both ends of the gear body 1 in the axial direction of the gear body 1, and the axial line of the ring groove 13 coincides with the axial line of the gear body 1. The wall of the end of the through groove 11 away from the oil guide groove 12 is provided with a chamfer 15, and the chamfer 15 is used for abutting with the end of the bearing.

[0042] Referring to Figure 1 and Figure 2, the groove wall of the ring groove 13 is provided with an oil guide groove 12, the length direction of the oil guide groove 12 and the radial direction of the gear body 1 form an acute angle, the oil guide groove 12 is arc-shaped, the oil guide groove 12 is connected with the through groove 11 at one end of the oil guide groove 12 away from the ring groove 13 along the length direction of the oil guide groove 12, and the oil guide groove 12 penetrates the gear body 1 at the side away from the other ring groove 13.

[0043] Referring to Figure 2 , the distance between the two side walls of the oil guide groove 12 perpendicular to the length direction of the oil guide groove 12 gradually decreases from the side away from the through groove 11 to the side close to the through groove 11, and the end of the oil guide groove 12 close to the through groove 11 is tangent to the radial direction of the through groove 11. The side wall of the oil guide groove 12 away from the through groove 11 is provided with a round corner 14. The oil guide groove 12 is provided with a plurality of oil guide grooves 12, and the plurality of oil guide grooves 12 are distributed circumferentially around the axis of the gear body 1. In this embodiment, the oil guide groove 12 is provided with three oil guide grooves 12, and the three oil guide grooves 12 are uniformly distributed circumferentially around the axis of the gear body 1.

[0044] The implementation principle of embodiment 1 is that the bearing is arranged on the positioning column of the fixed frame in the planetary reducer, the end of the gear body 1 away from the oil guide groove 12 is directed towards the bearing, the chamfer 15 abuts against the bearing, and the bearing is embedded in the through groove 11.

[0045] When the planetary reducer is working, the gear body 1 rotates, so that the lubricating oil in the planetary reducer enters the oil guide groove 12 along the round corner 14, and then flows along the groove wall of the oil guide groove 12 towards the through groove 11. The cross-sectional area of the side of the oil guide groove 12 close to the through groove 11 is smaller than that of the side of the oil guide groove 12 away from the through groove 11, so that the pressure of the lubricating oil in the oil guide groove 12 increases, which helps to spray the lubricating oil to the bearing and improves the lubrication effect between the bearing and the gear body 1.

[0046] Embodiment 2

[0047] Referring to Figure 3 , the difference between this embodiment and embodiment 1 is that the plurality of oil guide grooves 12 are divided into two groups, and the two groups of oil guide grooves 12 correspond to two ring grooves 13 respectively, and the oil guide grooves 12 in the same group are distributed circumferentially around the axis of the gear body 1. In this embodiment, one ring groove 13 corresponds to three oil guide grooves 12, and the three oil guide grooves 12 are uniformly distributed circumferentially around the axis of the gear body 1. The chamfer 15 is provided with two chamfers 15, and the two chamfers 15 are symmetrically distributed along the axis of the gear body 1.

[0048] The oil storage groove 16 is annular, the axis of the oil storage groove 16 coincides with the axis of the gear body 1, the oil storage groove 16 is provided with two, the two oil storage grooves 16 are symmetrically distributed along the axis of the gear body 1, one oil storage groove 16 corresponds to a group of oil guide grooves 12, and the oil storage groove 16 is in communication with the oil guide groove 12. The connecting groove 17 is provided on the groove wall of the through groove 11, the length direction of the connecting groove 17 is parallel to the axis direction of the gear body 1, and the two ends of the connecting groove 17 along the length direction of the connecting groove 17 are in communication with the two oil storage grooves 16 respectively. The connecting groove 17 is provided with a plurality of, and the plurality of connecting grooves 17 are circumferentially spaced apart around the axis of the gear body 1. In the embodiment, the connecting groove 17 is provided with eighteen, and the eighteen connecting grooves 17 are circumferentially uniformly distributed around the axis of the gear body 1.

[0049] The implementation principle of the embodiment 2 is that the gear body 1 is provided with the oil guide groove 12 on both sides, so that any one side can be oriented towards the fixing frame during assembly, the assembly efficiency is improved, the lubricating oil is sent into the through groove 11 by the oil guide grooves 12 on both sides at the same time, and the lubrication efficiency of the gear body 1 is improved.

[0050] The lubricating oil enters the through groove 11 along the oil guide groove 12, the excess lubricating oil is stored in the oil storage groove 16, and the lubricating oil enters the connecting groove 17 to lubricate the bearing.

[0051] Embodiment 3

[0052] With reference to Figure 4 The difference between the embodiment and the embodiment 1 is that the gear further comprises a lubricating assembly 2, the first sliding groove 18 is provided at the groove wall of the ring groove 13 on one side close to the oil guide groove 12, the first sliding groove 18 penetrates the gear body 1 away from the other side of the ring groove 13, the groove wall of the first sliding groove 18 on the side close to the other ring groove 13 is located between the two ring grooves 13, and the cross-sectional shape of the first sliding groove 18 is the same as that of the oil guide groove 12. The first sliding groove 18 is provided with a plurality of, and the plurality of first sliding grooves 18 are circumferentially spaced apart around the gear body 1. In the embodiment, the first sliding groove 18 is provided with three, one first sliding groove 18 is arranged between the two adjacent oil guide grooves 12, and the three first sliding grooves 18 are circumferentially uniformly distributed around the axis of the gear body 1.

[0053] With reference to Figure 4 and Figure 5The lubricating assembly 2 comprises the sliding blocks 21, the reset members 22 and the heat expansion blocks 23. The number of the sliding blocks 21 and the heat expansion blocks 23 is the same as that of the first sliding grooves 18 and they are one-to-one corresponding. The sliding blocks 21 are slidably embedded in the first sliding grooves 18, and the sliding direction of the sliding blocks 21 is parallel to the axis of the gear body 1. The end of the sliding block 21 close to the gear body 1 is flush with the groove wall of the through groove 11, and the other end of the sliding block 21 is flush with the groove wall of the ring groove 13. The groove bottom of the first sliding groove 18 is provided with a plurality of accommodating grooves 19, and the plurality of accommodating grooves 19 are spaced apart along the length direction of the first sliding groove 18. In the embodiment, the accommodating grooves 19 are three, and the three accommodating grooves 19 are evenly distributed along the length direction of the first sliding groove 18. The number of the reset members 22 is the same as that of the accommodating grooves 19 and they are one-to-one corresponding. The reset members 22 are connected between the gear body 1 and the sliding blocks 21, and the reset members 22 make the side surface of the sliding block 21 away from the first sliding groove 18 flush with the side surface of the gear body 1 along the axis direction of the gear body 1. In the embodiment, the reset members 22 are springs. One end of the reset member 22 is connected to the side surface of the sliding block 21 close to the groove bottom of the first sliding groove 18, and the other end of the reset member 22 is connected to the groove bottom of the accommodating groove 19. The groove wall of the through groove 11 is provided with the second sliding groove 110, and the second sliding groove 110 is communicated with the first sliding groove 18. The side of the sliding block 21 close to the groove bottom of the first sliding groove 18 is fixedly connected with the connecting block 24. The end of the connecting block 24 away from the sliding block 21 is slidably embedded in the second sliding groove 110. The sliding direction of the connecting block 24 is parallel to the sliding direction of the sliding block 21, and the side wall of the connecting block 24 is in close contact with the groove wall of the second sliding groove 110. The side surface of the connecting block 24 away from the through groove 11 is fixedly connected with the abutting block 25. The groove bottom of the second sliding groove 110 is provided with the third sliding groove 111, and the abutting block 25 is slidably embedded in the third sliding groove 111. The sliding direction of the abutting block 25 is parallel to the sliding direction of the connecting block 24. The side groove wall of the third sliding groove 111 close to the first sliding groove 18 is provided with the mounting groove 112, and the heat expansion block 23 is embedded in the mounting groove 112. The end of the heat expansion block 23 away from the first sliding groove 18 is connected to the side surface of the abutting block 25 close to the first sliding groove 18.

[0054] The implementation principle of the embodiment 3 is that when the temperature of the bearing in the through groove 11 rises, the heat expansion block 23 is heated, the abutting block 25 is pushed to slide, the connecting block 24 is driven to slide, the sliding block 21 is driven to slide against the elastic force of the reset member 22, the first sliding groove 18 is communicated with the outside and the through groove 11, and the lubricating oil outside the gear body 1 is facilitated to enter the through groove 11 to lubricate the bearing.

[0055] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A gear wheel, characterized by: The gear body (1) is coaxial with a through groove (11) for embedding a bearing; the gear body (1) is provided with an oil guide groove (12) at the outer wall; the oil guide groove (12) is communicated with the through groove (11); the length direction of the oil guide groove (12) and the radial direction of the gear body (1) form an acute angle.

2. The gear of claim 1, wherein: The oil guide groove is arc-shaped.

3. The gear of claim 2, wherein: The gear body is provided with an annular groove at the outer periphery of both ends along the gear body axis direction; one end of the oil guide groove away from the through groove is located at the annular groove wall.

4. The gear of claim 3, wherein: The oil guide groove (12) penetrates the gear body (1) from one side surface away from the other annular groove (13).

5. The gear of claim 4, wherein: The oil guide groove (12) is provided with a plurality of oil guide grooves; the plurality of oil guide grooves (12) are distributed in a circumferential direction around the gear body (1) axis.

6. The gear of claim 5, wherein: One annular groove (13) corresponds to three oil guide grooves (12); the three oil guide grooves (12) are uniformly distributed in a circumferential direction around the gear body (1) axis.

7. The gear of claim 2, wherein: The distance between the two side walls of the oil guide groove (12) along the length direction of the oil guide groove (12) is gradually reduced towards the side close to the through groove (11) along the length direction of the oil guide groove (12).

8. The gear of claim 2, wherein: The end of the oil guide groove (12) wall close to the through groove (11) is tangent to the radial direction of the through groove (11).

9. The gear of claim 1, wherein: The oil guide groove (12) is provided with a round corner (14) at the wall away from the through groove (11) end.

10. The gear of claim 1, wherein: The through groove (11) is provided with a chamfer (15) at the wall away from the oil guide groove (12) end.

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