Lubrication channel structure for deep groove ball bearings

Abstract

The present disclosure relates to the technical field of automatic transmissions and provides a lubrication channel structure for a deep groove ball bearing. The lubricating oil channel structure includes an oil hole and a lubricating oil channel. A snap ring is provided on one side of the deep groove ball bearing. An annular groove is provided on the inner wall of the transmission housing. An oil hole communicating with the annular groove is provided on the housing. The other end of the oil hole communicates with the main cavity. A notch is provided on one side of the snap ring. A lubricating oil channel is formed between the outer ring of the snap ring and the inner wall of the annular groove. The lubricating oil flows to the deep groove ball bearing through the lubricating oil channel. The lubricating oil channel structure of the present disclosure includes an oil hole and a lubricating oil channel. During the operation of the transmission, its internal components rotate at high speed, and the lubricating oil on each component forms an oil mist. The oil mist enters the lubricating oil channel through the oil hole, and then lubricates the deep groove ball bearing. This design method does not require an oil hole to be opened on the planet carrier, has a simple structure, increases the strength of the planet carrier, and reasonably utilizes the oil mist inside the transmission, effectively saving lubricating oil.

Description

Technical Field

[0001] The present disclosure relates to the technical field of automatic transmissions, and in particular to a lubrication channel structure for a deep groove ball bearing. Background Art

[0002] An automotive transmission is a speed-changing device used to coordinate the rotational speed of an engine and the actual driving speed of wheels, and is used to bring out the best performance of the engine. The transmission can generate different speed ratios between the engine and the wheels during the driving of the vehicle, and realize the transmission of rotational speeds at different gears.

[0003] Transmissions are divided into two types: manual and automatic. A manual transmission mainly consists of gears and a rotating shaft, and generates speed change and torque change through different gear combinations; while an automatic transmission AT consists of a hydraulic torque converter, planetary gears, and a hydraulic control system, and achieves speed change and torque change through the methods of hydraulic transmission and gear combination.

[0004] Among them, the automatic transmission has the advantages of comfortable driving and reducing driver fatigue, and has become a development direction for the configuration of modern sedans. The automatic transmission uses a planetary gear mechanism for speed change. It can automatically change speed according to the degree of the accelerator pedal and the vehicle speed change. The driver only needs to operate the accelerator pedal to control the vehicle speed. The driver can concentrate on the road traffic without being distracted by shifting gears.

[0005] The output shaft of the automatic transmission is in transmission connection with the planet carrier of the planetary transmission mechanism arranged close to the output shaft. The rotation of the planet carrier drives the output shaft to rotate. Among them, the planet carrier penetrates through the output end of the transmission housing, and the planet carrier is connected to the housing through a deep groove ball bearing. During the operation of the transmission, it is necessary to supply lubricating oil to the deep groove ball bearing to ensure the lubrication effect of the deep groove ball bearing. In the prior art, an oil passage is usually opened on the planet carrier, and the oil passage is communicated with the lubricating oil path of the transmission. The lubricating oil flows to the deep groove ball bearing through the lubricating oil path and the oil passage. However, this lubrication method requires the lubricating oil path of the transmission to separately supply lubricating oil to the deep groove ball bearing, increasing the consumption of lubricating oil, and adding a lubricating oil path and an oil passage to the input shaft and the planet carrier respectively, reducing the strength of the input shaft and the planet carrier. Summary of the Invention

[0006] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a lubrication channel structure for a deep groove ball bearing.

[0007] The present disclosure provides a lubrication channel structure for a deep groove ball bearing. A snap ring is provided on one side of the deep groove ball bearing facing the output end of the transmission. An annular groove for installing the snap ring is provided on the inner wall of the housing of the transmission. An oil hole communicating with the annular groove is provided on the housing, and the other end of the oil hole communicates with the main cavity of the housing. A notch is provided on one side of the snap ring, and the position of the notch is opposite to that of the oil hole. A lubricating oil channel is formed between the outer ring of the snap ring and the inner wall of the annular groove, and the lubricating oil flows to the deep groove ball bearing through the lubricating oil channel.

[0008] Optionally, a first gap is formed between the outer circumference of the snap ring and the inner wall of the annular groove, and a second gap is formed between one side of the snap ring facing the input end of the transmission and the inner wall of the annular groove. The first gap and the second gap communicate with each other to form the lubricating oil channel.

[0009] Optionally, one side of the deep groove ball bearing facing the snap ring extends out of the inner wall of the annular groove close to the deep groove ball bearing. One side of the snap ring is supported on the side surface of the deep groove ball bearing, so that the second gap is formed between the snap ring and the inner wall of the annular groove. The other side of the snap ring is supported on the inner wall of the annular groove close to the output end of the transmission. The outer diameter of the snap ring is smaller than the diameter of the annular groove, so that the first gap is formed between the outer ring of the snap ring and the inner wall of the annular groove.

[0010] Optionally, the inner wall of the annular groove on the side facing the output end of the transmission is a slope surface, and the snap ring is provided with a chamfer matching the slope surface.

[0011] Optionally, a stepped groove for installing the deep groove ball bearing is provided on the inner wall of the housing. The stepped surface of the stepped groove supports on one side of the deep groove ball bearing facing the input end of the transmission, and the annular groove is arranged on the inner wall of the large hole part of the stepped groove.

[0012] Optionally, an axial limiting member is provided on the outer circumference of the planet carrier of the transmission. The axial limiting member supports on one side of the deep groove ball bearing facing the output end of the transmission, and a first sealing member is provided between the axial limiting member and the planet carrier.

[0013] Optionally, a second sealing member is provided between the outer circumference of the axial limiting member and the inner wall of the housing. The second sealing member supports on the side of the snap ring away from the deep groove ball bearing.

[0014] The technical solution provided by the embodiment of the present disclosure has the following advantages compared with the prior art:

[0015] The lubricating oil passage structure of the present disclosure includes an oil hole and a lubricating oil passage. During the operation of the transmission, its internal components rotate at high speed, and the lubricating oil on each component forms an oil mist. The oil mist enters the lubricating oil passage through the oil hole, and then lubricates the deep groove ball bearing. This design method does not require an oil hole to be opened on the planet carrier, has a simple structure, increases the strength of the planet carrier, and reasonably utilizes the oil mist inside the transmission, effectively saving lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a sectional view of the arrangement of the deep groove ball bearing and the snap ring according to the embodiment of the present disclosure;

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Figure 3 It is a sectional view of the arrangement of the oil hole according to the embodiment of the present disclosure;

[0021] Figure 4 It is a sectional view of the transmission along its radial direction according to the embodiment of the present disclosure;

[0022] Figure 5 It is a sectional view of the snap ring according to the embodiment of the present disclosure.

[0023] Wherein, 1. housing; 11. planet carrier; 2. deep groove ball bearing; 3. snap ring; 4. oil hole; 5. main cavity; 6. notch; 7. lubricating oil passage; 8. axial limiting member; 9. first seal; 91. second seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the following will further describe the solutions of the present disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0025] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure may be practiced in other ways different from those described herein. Obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0026] Combined with Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present application provides a lubrication channel structure for a deep groove ball bearing. A snap ring 3 is provided on one side of the deep groove ball bearing 2 facing the output end of the transmission, and the snap ring 3 supports on one side of the deep groove ball bearing 2 facing the output end of the transmission. A stepped groove for installing the deep groove ball bearing 2 is provided on the inner wall of the housing 1, and the step surface of the stepped groove supports on one side of the deep groove ball bearing 2 facing the input end of the transmission. The axial position of the deep groove ball bearing 2 is restricted by the stepped groove and the snap ring 3.

[0027] Combined with Figure 2 and Figure 3 As shown, an annular groove for installing the snap ring 3 is provided on the inner wall of the housing 1 of the transmission. Among them, the annular groove is provided on the inner wall of the large hole part of the stepped groove. An oil hole 4 communicating with the annular groove is provided on the housing 1, and the other end of the oil hole 4 communicates with the main cavity 5 of the housing 1, so that the oil mist in the main cavity 5 enters the annular groove through the oil hole 4. Each planetary gear set component and shifting element of the transmission are arranged in the housing 1, and the lubricating oil forms an oil mist due to the rotation of the planetary gear set components and shifting elements.

[0028] Combined with Figure 4 and Figure 5 As shown, a notch 6 is provided on one side of the snap ring 3, and the notch 6 is opposite to the position of the oil hole 4. The lubricating oil flowing out through the oil hole 4 flows to the deep groove ball bearing 2 through the notch 6. A lubricating oil channel 7 is formed between the outer ring of the snap ring 3 and the inner wall of the annular groove, and the lubricating oil flows to the deep groove ball bearing 2 through the lubricating oil channel 7, increasing the lubrication effect of the deep groove ball bearing 2.

[0029] The lubricating oil channel 7 structure of the present disclosure includes the oil hole 4 and the lubricating oil channel 7. During the working process of the transmission, its internal components rotate at high speed, the lubricating oil on each component forms an oil mist, and the pressure inside the main cavity 5 increases. The oil mist enters the lubricating oil channel 7 through the oil hole 4 under the action of the pressure, and then lubricates the deep groove ball bearing 2. This design method does not require drilling an oil hole 4 on the planet carrier 11, has a simple structure, increases the strength of the planet carrier 11, and reasonably utilizes the oil mist inside the transmission, effectively saving lubricating oil.

[0030] As Figure 3As shown, a first gap is formed between the outer periphery of the snap ring 3 and the inner wall of the annular groove, and a second gap is formed between one side of the snap ring 3 facing the input end of the transmission and the inner wall of the annular groove. The first gap and the second gap communicate with each other to form a lubricating oil channel 7. Specifically, one side of the deep groove ball bearing 2 facing the snap ring 3 extends out of the annular groove and is close to the inner wall on the side of the deep groove ball bearing 2. One side of the snap ring 3 is supported on the side surface of the deep groove ball bearing 2, so that a second gap is formed between the snap ring 3 and the inner wall of the annular groove. The other side of the snap ring 3 is supported on the inner wall of the annular groove close to the output end of the transmission. The outer diameter of the snap ring 3 is smaller than the diameter of the annular groove, so that a first gap is formed between the outer ring of the snap ring 3 and the inner wall of the annular groove. This design method has a simple structure and effectively utilizes the space of the annular groove.

[0031] Combined with Figure 3 and Figure 5 As shown, the inner wall of the annular groove on the side facing the output end of the transmission is a ramp surface, and the snap ring 3 is provided with a chamfer matching the ramp surface. The so-called matching here means that the inclination angle of the ramp surface is the same as the angle of the chamfer. The chamfer of the snap ring 3 is supported on the ramp surface to increase the circumferential limiting effect of the snap ring 3.

[0032] Combined with Figure 2 and Figure 3 As shown, an axial limiting member 8 is provided on the outer periphery of the planet carrier 11 of the transmission. The axial limiting member 8 is supported on one side of the deep groove ball bearing 2 facing the output end of the transmission. A first seal 9 is provided between the axial limiting member 8 and the planet carrier 11. During the operation of the transmission, the lubricating oil flows to the deep groove ball bearing 2. Since there is a gap between the deep groove ball bearing 2 and the planet carrier 11, therefore, the lubricating oil will flow to the outer periphery of the planet carrier 11. And because there is a gap between the axial limiting member 8 and the planet carrier 11, therefore, in order to prevent the lubricating oil from flowing out through this gap and causing waste of lubricating oil, a first seal 9 is provided between the axial limiting member 8 and the planet carrier 11.

[0033] A second seal 91 is provided between the outer periphery of the axial limiting member 8 and the inner wall of the housing 1. The second seal 91 is supported on the side of the snap ring 3 away from the deep groove ball bearing 2. By providing the second seal 91 to seal the housing 1, it is prevented that the lubricating oil flows out through the end of the housing 1.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0035] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lubrication channel structure for a deep groove ball bearing, characterized in that, a snap ring (3) is provided on one side of the deep groove ball bearing (2) facing the output end of the transmission. An annular groove for installing the snap ring (3) is provided on the inner wall of the housing (1) of the transmission. An oil hole (4) communicating with the annular groove is provided on the housing (1). The other end of the oil hole (4) communicates with the main cavity (5) of the housing (1). A notch (6) is provided on one side of the snap ring (3), and the position of the notch (6) is opposite to that of the oil hole (4). A lubricating oil channel (7) is formed between the outer ring of the snap ring (3) and the inner wall of the annular groove. Lubricating oil flows to the deep groove ball bearing (2) through the lubricating oil channel (7); a first gap is formed between the outer circumference of the snap ring (3) and the inner wall of the annular groove, and a second gap is formed between one side of the snap ring (3) facing the input end of the transmission and the inner wall of the annular groove. The first gap and the second gap communicate with each other and form the lubricating oil channel (7).

2. The lubrication channel structure for a deep groove ball bearing according to claim 1, characterized in that, one side of the deep groove ball bearing (2) facing the snap ring (3) extends out of the inner wall of the annular groove close to the side of the deep groove ball bearing (2). One side of the snap ring (3) is supported on the side surface of the deep groove ball bearing (2), so that the second gap is formed between the snap ring (3) and the inner wall of the annular groove. The other side of the snap ring (3) is supported on the inner wall of the annular groove close to the output end of the transmission. The outer diameter of the snap ring (3) is smaller than the diameter of the annular groove, so that the first gap is formed between the outer ring of the snap ring (3) and the inner wall of the annular groove.

3. The lubrication channel structure for a deep groove ball bearing according to claim 2, characterized in that, the inner wall of the annular groove on the side facing the output end of the transmission is a slope surface, and the snap ring (3) is provided with a chamfer matching the slope surface.

4. The lubrication channel structure for a deep groove ball bearing according to claim 1, characterized in that, a stepped groove for installing the deep groove ball bearing (2) is provided on the inner wall of the housing (1). The step surface of the stepped groove supports on one side of the deep groove ball bearing (2) facing the input end of the transmission. The annular groove is arranged on the inner wall of the large hole part of the stepped groove.

5. The lubrication channel structure for a deep groove ball bearing according to claim 1, characterized in that, an axial limiting member (8) is provided on the outer circumference of the planet carrier (11) of the transmission. The axial limiting member (8) supports on one side of the deep groove ball bearing (2) facing the output end of the transmission. A first sealing member (9) is provided between the axial limiting member (8) and the planet carrier (11).

6. The lubrication channel structure for a deep groove ball bearing according to claim 5, characterized in that, a second sealing member (91) is provided between the outer circumference of the axial limiting member (8) and the inner wall of the housing (1). The second sealing member (91) supports on the side of the snap ring (3) away from the deep groove ball bearing (2).

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