Shaft lubrication system with buckle type oil retainer

Abstract

The utility model discloses a shaft lubrication system with a buckle type oil retainer. An oil pump assembly is fixedly arranged at the axial front end of an intermediate shaft of a transmission; comprising an oil pump shell, a first shaft is arranged in a first shaft penetrating through hole in the oil pump shell, a first shaft oil storage ring groove is formed in the first shaft, the two sides of the first shaft oil storage ring groove are each provided with an oil retainer assembly groove, and oil retainers are arranged in the two oil retainer assembly grooves. The outer wall of the oil retainer is in contact with the inner wall of a shaft penetrating through hole of the oil pump shell; an oil inlet hole is formed in the first shaft oil storage ring groove; an oil retainer with a conventional structure is omitted, so that the structure of assembling parts at the oil pump shell and the oil inlet hole is greatly simplified, and the cost is reduced; the outer wall of the buckle type oil retainer and the first shaft of the oil pump shell penetrate through the via hole to form an oil retaining structure, the structure is simple, the requirement for machining precision of the matching face is low, and the technical problem that in the prior art, an oil retainer assembly at the first shaft via hole position of the shell is complex in structure is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of transmission, and relates to a one-shaft lubricating system, in particular to a one-shaft lubricating system with a buckle type oil retaining ring. BACKGROUND

[0002] In order to improve the lubrication and cooling conditions of transmission parts, a forced lubricating oil pump driven by a transmission intermediate shaft is arranged in most heavy truck transmissions, lubricating oil is sent to bearings and key parts through lubricating oil pipes arranged in the transmission and shaft center oil channels and radial oil holes arranged on the shafts to provide forced lubrication.

[0003] In order to ensure that as much oil as possible pumped by the oil pump enters the one-shaft oil inlet hole, an oil storage and retaining device is usually arranged at the one-shaft oil inlet hole and the housing matching part, so that the lubricating oil pumped by the oil pump is in a relatively closed space and better enters the one-shaft oil channel. The oil retaining ring assembly is usually arranged at the through hole part matched with the one-shaft on the housing, and the lubricating oil pumped by the oil pump can enter the one-shaft oil channel as much as possible through the cooperation of the sealing ring on the oil retaining ring and the shaft diameter on both sides of the one-shaft oil inlet hole. However, the oil retaining ring assembly arranged at the one-shaft through hole part of the housing has a complex structure, which is usually composed of an oil retaining ring body and two sealing rings arranged on the body. Oil grooves and oil holes for communicating with the housing oil channel and the one-shaft oil hole are arranged on the oil retaining ring body, including a plurality of radial oil holes and oil retaining ring grooves on the inner and outer circular surfaces, and the oil retaining ring body is installed in the housing seat hole in an interference manner, which requires high machining precision and high manufacturing cost. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a one-shaft lubricating system with a buckle type oil retaining ring to solve the technical problem of the complex structure of the oil retaining ring assembly at the one-shaft through hole part of the housing in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A single-shaft lubrication system with a snap-fit ​​oil retainer ring includes an oil pump assembly fixedly mounted at the axial front end of the intermediate shaft of a transmission. The system includes an oil pump housing, a shaft disposed within a through-hole on the oil pump housing, an oil reservoir ring groove formed on the shaft, and oil retainer ring mounting grooves on both sides of the oil reservoir ring groove. Oil retainer rings are disposed in both oil retainer ring mounting grooves, and the outer wall of each oil retainer ring contacts the inner wall of the through-hole of the shaft in the oil pump housing. An oil inlet hole is provided in the oil reservoir ring groove, connecting the oil reservoir ring groove and the inner cavity of the shaft.

[0007] The oil pump housing is also provided with a lubricating oil passage, which connects the primary shaft oil reservoir groove and the oil pump assembly.

[0008] An oil guide sleeve is provided at the axial rear end of the shaft.

[0009] This utility model also includes the following technical features:

[0010] A shaft bearing is also fitted onto the shaft, and the shaft is mounted in the housing of the transmission via the shaft bearing.

[0011] The oil baffle ring has an open structure, with an L-shaped buckle on each end, and the openings of the two L-shaped buckles are arranged opposite to each other.

[0012] The L-shaped buckle includes a groove and a protrusion, wherein the width of the groove is 1.5 to 2 times the width of the protrusion.

[0013] The inner diameter of the oil baffle ring when it is open is at least greater than the outer diameter of one side of the shaft.

[0014] The outer diameter of the oil baffle ring when it is fastened to the oil baffle ring assembly groove is larger than the outer diameter of one shaft on both sides of the oil baffle ring assembly groove.

[0015] The width of the oil baffle ring assembly groove is greater than the width of the oil baffle ring.

[0016] The bottom diameter of the oil baffle ring assembly groove is smaller than the inner diameter of the oil baffle ring when it is fastened.

[0017] The outer surface of the oil baffle ring is a polished surface.

[0018] Compared with the prior art, the beneficial technical effects of this utility model are:

[0019] ( In this utility model, the conventional oil baffle ring structure is eliminated, which greatly simplifies the structure of the oil pump housing and the parts fitted at the oil inlet, and reduces the cost. The outer wall of the snap-on oil baffle ring and the through hole of the oil pump housing form an oil baffle structure. The structure is simple and the machining accuracy requirements of the mating surface are low, which solves the technical problem that the oil baffle ring assembly structure at the through hole of the housing is relatively complex in the prior art.

[0020] (II) The oil baffle ring in the utility model is arranged in the oil baffle ring assembling groove on the shaft, the buckle type structure is convenient to disassemble and assemble, and the machining precision requirement for the shaft diameter of the shaft is lower. The lubricating oil channel on the oil pump shell directly leads to the oil inlet hole on the shaft, the oil liquid conveying path is more direct, the oil liquid flow resistance is small, and this is beneficial to improving the working efficiency and service life of the oil pump. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the utility model;

[0022] Figure 2 It is a partial schematic view of the shaft with the oil baffle ring assembling groove part in the utility model;

[0023] Figure 3 It is a free state schematic view of the oil baffle ring in the utility model;

[0024] Figure 4 It is a buckle assembling schematic view of the oil baffle ring in the utility model;

[0025] Figure 5 It is a partial view of the oil baffle ring installed on the shaft in the utility model.

[0026] The meanings of various reference numerals in the drawing are as follows: 1 is a shaft, 2 is an oil pump shell, 3 is a shell lubricating oil channel, 4 is an oil pump assembly, 5 is an intermediate shaft, 6 is an oil guide sleeve, 7 is an oil baffle ring, 8 is a shaft bearing, 11 is an oil baffle ring assembling groove, 12 is a shaft oil storage ring groove, 13 is an oil inlet hole, and 14 is an L-shaped buckle.

[0027] The specific content of the utility model is further explained and described in detail in combination with the following embodiments. DETAILED DESCRIPTION

[0028] It should be noted that all parts in the utility model, without special description, adopt parts known in the art.

[0029] The following gives the specific embodiments of the utility model, and it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical scheme of the application falls within the protection scope of the utility model.

[0030] The utility model discloses a kind of one-axis lubrication systems with buckle type oil retaining ring, the axial front end of intermediate shaft of transmission is fixedly provided with oil pump assembly 4;Including oil pump shell 2, one-axis passes through the hole in oil pump shell 2 and is provided with one-axis 1, one-axis 1 is set with one-axis oil ring groove 12, one-axis oil ring groove 12 Two sides are also respectively provided with one oil retaining ring assembly groove 11, two oil retaining ring assembly grooves 11 are provided with oil retaining ring 7, the outer wall of oil retaining ring 7 and the one-axis through hole inner wall of oil pump shell 2 Contact;One-axis oil ring groove 12 is provided with oil inlet hole 13, and oil inlet hole 13 connects one-axis oil ring groove 12 and one-axis 1 inner cavity;

[0031] Oil inlet hole 13 is provided with oil inlet hole 13, and oil inlet hole 13 connects one-axis oil ring groove 12 and oil pump assembly 4;

[0032] The axial rear end of one-axis 1 is provided with oil guide sleeve 6.

[0033] In the above technical scheme, the conventional structure oil retaining ring is cancelled, the structure of the parts matched at oil pump shell 2 and oil inlet hole 13 is greatly simplified, and the cost is reduced;The outer wall of oil retaining ring 7 and the one-axis through hole of oil pump shell 2 cooperate to form an oil retaining structure, which is simple in structure and low in matching surface machining precision, and solves the technical problem of complex oil retaining ring assembly structure of the shell one-axis through hole part in the prior art.

[0034] The lubricating oil channel 3 on the oil pump shell 2 directly communicates with the oil inlet hole 13 on the one-axis, the oil liquid conveying path is more direct, the oil liquid flow resistance is small, and it is beneficial to improve the working efficiency and service life of the oil pump.

[0035] The path of the lubricating oil: the lubricating oil pumped out by the oil pump is sent to the one-axis through hole on the oil pump shell 2 through the lubricating oil channel 3 on the oil pump shell 2, and then enters the one-axis oil ring groove 12, and then enters the inside of the one-axis through the oil inlet hole 13, and then is sent to the shaft oil channel of the second shaft of the transmission through the oil guide sleeve 6 installed at the rear end of the one-axis, thereby providing forced lubrication for the transmission.

[0036] One-axis bearing 8 is further provided on one-axis 1, and one-axis 1 is arranged in the shell of the transmission through one-axis bearing 8.

[0037] In the above technical scheme, one-axis bearing 8 is limited in front and back by the stop opening on the oil pump shell 2 and the shaft shoulder on the one-axis.

[0038] The oil retaining ring 7 is of an open structure, and an L-shaped buckle 14 is arranged at each end of the oil retaining ring 7.

[0039] In the above technical scheme, the oil retaining ring 7 is arranged in the oil retaining ring assembly groove 11 on the one-axis, and the buckle type structure is convenient to disassemble and assemble, and the machining precision requirement for the shaft diameter of the one-axis is low.

[0040] The L-shaped buckle 14 includes a groove and a protrusion, wherein the width of the groove is 1.5-2 times the width of the protrusion.

[0041] In the above technical solution, the groove is configured to enter during buckling and exit during unbuckling.

[0042] The inner diameter of the oil baffle ring 7 in the open state is at least greater than the outer diameter of one side of the shaft 1.

[0043] In the above technical solution, the oil baffle ring 7 is designed to be able to be fitted from one end of the shaft into the oil baffle ring assembly groove 11.

[0044] The outer diameter of the oil baffle ring 7 when buckled in the oil baffle ring assembly groove 11 is greater than the outer diameter of the shaft 1 on both sides of the oil baffle ring assembly groove 11.

[0045] In the above technical solution, as shown in Figure 5 The oil baffle ring 7 and the shaft passing through the hole of the oil pump housing 2 are in a matching relationship, and the outer wall of the shaft does not match the shaft passing through the hole of the oil pump housing 2, thereby reducing the surface machining precision of the shaft.

[0046] The width of the oil baffle ring assembly groove 11 is greater than the width of the oil baffle ring 7.

[0047] In the above technical solution, the oil baffle ring 7 is positioned to facilitate assembly.

[0048] The bottom diameter of the oil baffle ring assembly groove is smaller than the inner diameter of the oil baffle ring 7 when buckled.

[0049] In the above technical solution, when the oil baffle ring 7 is removed from the shaft 1, it can be further squeezed to reduce its inner diameter, making it easier for the L-shaped buckle 14 to come off.

[0050] The outer surface of the oil baffle ring 7 is a polished surface.

[0051] In the above technical solution, the oil baffle ring 7 has a polished surface to facilitate better following and cooperation with the inner wall of the shaft passing through the hole of the oil pump housing 2 during rotation, thereby achieving good oil blocking effect.

Claims

1. A one shaft lubrication system with snap-on oil slinger, the axial forward end of the intermediate shaft of the transmission is fixedly provided with an oil pump assembly (4); characterized in that, The oil pump shell (2) is provided with a shaft (1) passing through the hole, the shaft (1) is provided with a shaft oil ring groove (12), the both sides of the shaft oil ring groove (12) are respectively provided with a oil ring assembly groove (11), the oil ring assembly groove (11) is provided with an oil ring (7), the outer wall of the oil ring (7) is in contact with the inner wall of the shaft passing hole of the oil pump shell (2), the shaft oil ring groove (12) is provided with an oil inlet hole (13), the oil inlet hole (13) is communicated with the shaft oil ring groove (12) and the inner cavity of the shaft (1). The oil pump shell (2) is further provided with a lubricating oil channel (3), the lubricating oil channel (3) is communicated with the shaft oil ring groove (12) and the oil pump assembly (4). The shaft (1) is provided with an oil guide sleeve (6) at the axial rear end.

2. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The shaft (1) is further provided with a shaft bearing (8), the shaft (1) is arranged in the housing of the transmission through the shaft bearing (8).

3. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The oil ring (7) is an open structure, and the both ends of the oil ring (7) are respectively provided with an L-shaped buckle (14), the opening directions of the two L-shaped buckles (14) are oppositely arranged.

4. The cartridge-style oil slinger shaft lubrication system of claim 3, wherein, The L-shaped buckle (14) comprises a groove and a protrusion, wherein the width of the groove is 1.5-2 times the width of the protrusion.

5. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The inner diameter of the oil ring (7) in the open state is at least greater than the outer diameter of one side of the shaft (1).

6. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The outer diameter of the oil ring (7) when buckled in the oil ring assembly groove (11) is greater than the outer diameter of the shaft (1) on both sides of the oil ring assembly groove (11).

7. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The width of the oil ring assembly groove (11) is greater than the width of the oil ring (7).

8. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The bottom diameter of the oil ring assembly groove is less than the inner diameter of the oil ring (7) when buckled.

9. The shaft lubricating system having a snap-on oil slinger as set forth in claim 1, wherein, The outer surface of the oil ring (7) is a polished surface.

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