Oil throwing lubrication structure and speed change system

Abstract

The utility model provides an oil slinging lubrication structure and a speed control system, which comprises a rotating shaft (1), the periphery of the rotating shaft (1) is correspondingly sleeved with a plurality of gears through a plurality of bearings (3), and grooves for communicating the inner cavity of the rotating shaft (1) with the corresponding bearings (3) are respectively formed in the corresponding positions on the rotating shaft (1); the rotating shaft is characterized in that an oil inlet pipe (2) extends into the cavity of the rotating shaft (1) from the oil inlet end, and the end, extending into the cavity of the rotating shaft (1), of the oil inlet pipe (2) is located between a first groove (11) and a second groove (12); by arranging the oil inlet pipe and increasing the length of the oil inlet pipe, the end, extending into the cavity of the rotating shaft, of the oil inlet pipe is located between the first groove and the second groove, the oil injection distance is increased, lubricating oil can reach the position of the fifth groove more easily, each stage of needle bearing is lubricated by oil, and no oil overflows from the left side; and the oil lubrication effect is maximized.

Description

Technical Field

[0001] The utility model belongs to the technical field of lubrication structures in a speed change system, and particularly relates to a splash lubrication structure and a speed change system. Background Art

[0002] Splash of the hollow shaft in the gearbox can lubricate the needle bearings between the gears and the shaft. Since the lubrication of the needle bearings does not require much flow rate, when designing the lubrication system of the gearbox, the flow rate allocated to the intermediate shaft is limited. In the existing splash structure of the intermediate shaft, the number of gear reduction stages is relatively large, the length of the intermediate shaft is relatively long, and the number of corresponding needle bearings is relatively large. How to ensure that each stage of the needle bearings can be lubricated with oil has become an urgent problem to be solved.

[0003] As Figure 1 shown, 11-15 are the first to fifth grooves connecting the inner cavity of the shaft to the corresponding different needle bearings. It can be seen from the splash simulation data table 1 of the shaft that there is no oil reaching the positions of the fourth groove 14 and the fifth groove 15. There are problems with the lubrication of the needle bearings at this position. At the same time, some oil will overflow from the left side of the intermediate shaft, resulting in a reduction in the flow rate of the bearing lubricating oil.

[0004] Table 1 Splash simulation data table of the shaft without an oil retaining ring

[0005]

[0006] In order to optimize the splash structure of the shaft so that each stage of the needle bearings can achieve oil lubrication, the following adjustment measures are taken: In order to maximize the lubrication effect of the oil entering the intermediate shaft and prevent the oil from overflowing from the left side, an oil retaining ring structure is added on the left side to block the oil, making it not easy for the oil to overflow; at the same time, in order to reduce the amount of lubricating oil at the first groove 11 and the second groove 12 so that the oil can reach the fourth groove 14 and the fifth groove 15, the grooves at the positions of the first groove 11, the second groove 12, and the third groove 13 are cancelled.

[0007] It can be seen from the simulation data table 2 that the amount of oil overflowing from the left side is reduced, the flow rate at the first groove 11 and the second groove 12 is reduced, and there is a small amount of oil at the fourth groove 14, but there is still no oil reaching the fifth groove 15.

[0008] Table 2 Splash simulation data table of the shaft with an oil retaining ring

[0009]

[0010] Therefore, there is an urgent need to provide a splash lubrication structure and a speed change system to solve the defects and deficiencies existing in the above-mentioned prior art. Summary of the Utility Model

[0011] To solve the defects and deficiencies existing in the prior art, the present utility model provides an oil-slinging lubrication structure and a speed change system.

[0012] The technical solution provided by the present utility model is as follows:

[0013] An oil-slinging lubrication structure includes a rotating shaft. A plurality of gears are correspondingly sleeved on the outer periphery of the rotating shaft through a plurality of bearings. Grooves for communicating the inner cavity of the rotating shaft with the corresponding bearings are respectively formed at corresponding positions on the rotating shaft. It is characterized in that: An oil inlet pipe is inserted into the cavity of the rotating shaft from the oil inlet end, and the end of the oil inlet pipe inserted into the cavity of the rotating shaft is located between the first groove and the second groove.

[0014] As a further preferred embodiment of the present utility model, the rotating shaft is successively provided with a first groove, a second groove, a third groove, a fourth groove and a fifth groove from the oil inlet end to the oil outlet end to respectively communicate the inner cavity of the rotating shaft with the corresponding first bearing, second bearing, third bearing, fourth bearing and fifth bearing.

[0015] As a further preferred embodiment of the present utility model, the bearings are all selected as needle bearings.

[0016] As a further preferred embodiment of the present utility model, the oil inlet pipe includes a support pipe and an extension pipe fixedly connected to the support pipe. The end of the extension pipe inserted into the cavity of the rotating shaft is located between the first groove and the second groove.

[0017] As a further preferred embodiment of the present utility model, an oil-slinging hole is formed at a position corresponding to the first groove on the outer wall of the extension pipe, and an oil outlet hole is formed at the end of the extension pipe inserted into the cavity of the rotating shaft.

[0018] As a further preferred embodiment of the present utility model, the aperture of the oil-slinging hole is smaller than the aperture of the oil outlet hole.

[0019] As a further preferred embodiment of the present utility model, the aperture of the oil-slinging hole is set to 2 mm, and the aperture of the oil outlet hole is set to 5 mm.

[0020] As a further preferred embodiment of the present utility model, an oil retaining ring is further arranged at a position close to the oil inlet end in the cavity of the rotating shaft. The oil retaining ring is arranged between the outer wall of the oil inlet pipe and the inner wall of the cavity of the rotating shaft.

[0021] As a further preferred embodiment of the present utility model, the fifth groove is communicated with the fifth bearing through an inclined flow channel, and the inclined flow channel is inclined in the direction towards the oil outlet end.

[0022] Furthermore, the present utility model also provides a speed change system, which is characterized in that: The speed change system adopts the above-mentioned oil-slinging lubrication structure.

[0023] Compared with the prior art, the beneficial effects achieved by the present utility model include:

[0024] 1) The present utility model provides an oil slinging lubrication structure and a speed change system. By providing an oil inlet pipe and lengthening the length of the oil inlet pipe, the end of the oil inlet pipe extending into the rotating shaft cavity is located between the first groove and the second groove, increasing the oil injection distance, enabling the lubricating oil to more easily reach the position of the fifth groove, achieving oil lubrication at each stage of the needle roller bearing, and preventing oil from overflowing from the left side, maximizing the oil lubrication effect.

[0025] 2) The present utility model provides an oil slinging lubrication structure and a speed change system. By optimizing the oil path structure of the fifth groove, the oil can be thrown out as soon as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the internal oil path structure of the rotating shaft without an oil retaining ring in the prior art.

[0027] Figure 2 It is a cross-sectional view of the internal oil path structure of the rotating shaft provided by the present utility model.

[0028] Figure 3 It is a schematic structural diagram of the oil inlet pipe provided by the present utility model.

[0029] Figure 4 It is an enlarged structural view of the position of the fifth groove of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] [First Embodiment]

[0034] As Figures 2 - 4 shown, a kind of oil slinging lubrication structure provided by the first embodiment of the present utility model includes a rotating shaft 1. A plurality of gears are correspondingly sleeved on the outer periphery of the rotating shaft 1 through a plurality of bearings 3. Grooves for communicating the inner cavity of the rotating shaft 1 with the corresponding bearings 3 are respectively opened at corresponding positions on the rotating shaft 1; As Figure 2 shown, from the oil inlet end to the oil outlet end direction on the rotating shaft 1, a first groove 11, a second groove 12, a third groove 13, a fourth groove 14 and a fifth groove 15 are successively opened to respectively communicate the inner cavity of the rotating shaft 1 with the corresponding first bearing 31, second bearing 32, third bearing 33, fourth bearing 34 and fifth bearing 35. The bearings in this embodiment are all selected as needle bearings.

[0035] As Figures 2 - 3 shown, an oil inlet pipe 2 is arranged to extend into the cavity of the rotating shaft 1 from the oil inlet end, and the end of the oil inlet pipe 2 extending into the cavity of the rotating shaft 1 is located between the first groove 11 and the second groove 12. By providing an oil inlet pipe and lengthening the length of the oil inlet pipe, the end of the oil inlet pipe extending into the cavity of the rotating shaft is located between the first groove and the second groove, increasing the oil injection distance, so that the lubricating oil can more easily reach the position of the fifth groove, thereby helping to achieve oil lubrication at each level of the needle bearing and preventing oil from overflowing from the left side, maximizing the oil lubrication effect.

[0036] As Figure 3As shown in the figure, the inlet pipe 2 in this embodiment includes a support pipe 20 and an extension pipe 21 fixedly connected to the support pipe 20. The end of the extension pipe 21 extending into the cavity of the rotating shaft 1 is located between the first groove 11 and the second groove 12. An oil slinging hole 22 is provided at a position corresponding to the first groove 11 on the outer wall of the extension pipe 21. In this embodiment, the aperture of the oil slinging hole is set to 2 mm. The lubricating oil entering through the inlet pipe 2 can enter the first groove 11 through the oil slinging hole 22 and then flow to the first bearing 31 communicated therewith to achieve lubrication of the first bearing 31. An oil outlet hole 23 is provided at the end of the extension pipe 21 extending into the cavity of the rotating shaft 1. The aperture of the oil slinging hole 22 is smaller than that of the oil outlet hole 23. In this embodiment, the aperture of the oil outlet hole is set to 5 mm to increase the oil injection distance, so that the lubricating oil can more easily reach the position where the fifth groove 15 is located.

[0037] As Figure 4 shown, the fifth groove 15 in this embodiment is communicated with the fifth bearing 35 through an inclined flow channel 151. The inclined flow channel 151 is inclined in the direction towards the oil outlet end. By optimizing the oil circuit structure of the fifth groove, the oil can be slung out as soon as possible.

[0038] In addition, a oil retaining ring 4 is further provided at a position near the oil inlet end in the cavity of the rotating shaft 1 in this embodiment. The oil retaining ring is arranged between the outer wall of the inlet pipe 2 and the inner wall of the cavity of the rotating shaft 1 to ensure the maximization of the lubrication effect of the oil entering the intermediate shaft and prevent the oil from overflowing from the left side. The added oil retaining ring 4 structure on the left side can block the oil, making it not easy for the oil to overflow.

[0039] Table 3 Comparison table of the rotating shaft oil slinging simulation data in this embodiment and the prior art

[0040]

[0041] It can be seen from the table that the oil slinging lubrication structure provided in this embodiment can achieve oil lubrication at each needle roller bearing and no oil overflows from the left side, achieving the maximization of the oil lubrication effect.

[0042] [Second Embodiment]

[0043] The second embodiment of the present utility model further provides a speed change system, which is characterized in that the speed change system adopts an oil slinging lubrication structure mentioned in the first embodiment.

[0044] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights involved.

Claims

1. An oil-swinging lubrication structure, comprising a rotating shaft (1), wherein a plurality of gears are correspondingly sleeved on the outer circumference of the rotating shaft (1) through a plurality of bearings (3), and grooves for connecting the inner cavity of the rotating shaft (1) and the corresponding bearings (3) are respectively provided at corresponding positions on the rotating shaft (1); characterized in that: An oil inlet pipe (2) is provided in the cavity of the rotating shaft (1) extending from the oil inlet end, and the end of the oil inlet pipe (2) extending into the cavity of the rotating shaft (1) is located between the first groove (11) and the second groove (12); The rotating shaft (1) is provided with a first groove (11), a second groove (12), a third groove (13), a fourth groove (14) and a fifth groove (15) in sequence from the oil inlet end to the oil outlet end, so as to respectively connect the inner cavity of the rotating shaft (1) with the corresponding first bearing (31), second bearing (32), third bearing (33), fourth bearing (34) and fifth bearing (35); The oil inlet pipe (2) comprises a support pipe (20) and an extension pipe (21) fixedly connected to the support pipe (20); the end of the extension pipe (21) extending into the cavity of the rotating shaft (1) is located between the first groove (11) and the second groove (12).

2. The oil-swinging lubrication structure according to claim 1, characterized in that: The bearings are all needle roller bearings.

3. The oil-swinging lubrication structure according to claim 1 is characterized in that: An oil-spinning hole (22) is provided on the outer wall of the extension tube (21) at a position corresponding to the first groove (11), and an oil outlet hole (23) is provided at the end of the extension tube (21) extending into the cavity of the rotating shaft (1).

4. The oil-swinging lubrication structure according to claim 3 is characterized in that: The diameter of the oil-slinging hole (22) is smaller than the diameter of the oil outlet hole (23).

5. The oil-swinging lubrication structure according to claim 4 is characterized in that: The diameter of the oil-slinging hole is set to 2 mm, and the diameter of the oil outlet hole is set to 5 mm.

6. The oil-swinging lubrication structure according to claim 1, characterized in that: An oil retaining ring (4) is also provided in the cavity of the rotating shaft (1) at a position close to the oil inlet end, and the oil retaining ring is provided between the outer wall of the oil inlet pipe (2) and the inner wall of the cavity of the rotating shaft (1).

7. The oil-swinging lubrication structure according to claim 1 is characterized in that: The fifth groove (15) is connected to the fifth bearing (35) via an oblique flow channel (151), and the oblique flow channel (151) is arranged to be inclined in the direction of the oil outlet end.

8. A speed change system, characterized in that: The speed change system adopts an oil-swing lubrication structure as described in any one of claims 1-7.

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