Low-noise automobile tensioning wheel bearing
By designing a grease-injected end cap structure in low-noise automotive tightening wheel bearings, using annular grooves and extruded cover plate rings, the convenient addition of grease is achieved, and the cumbersome problem of the grease addition process in the prior art is solved, and the lubrication effect is improved.
Patent Information
- Application Number
- CN202421803389.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-26
AI Technical Summary
Existing low-noise bearings need to be regularly added to grease after use for a period of time, and the process of adding grease in the prior art is cumbersome and inconvenient.
A low-noise automotive tightening wheel bearing is designed, adopting a grease-injected end cap structure, in which the grease-injected end cap is equipped with an annular groove and an extruded cover plate ring. The grease enters the groove through the grease runner and grease passage, achieving convenient addition of grease.
By extruding and extruding the cover ring, grease can easily enter the ball, simplifying the process of adding grease and improving the lubricating effect on the ball.
Smart Images
Figure CN222797946U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of bearings, and in particular to a low-noise automobile tensioner bearing. Background Art
[0002] The main function of the bearing is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. The transmission system in the car will use a tensioner to tighten the chain in the transmission system, and the use of the tensioner requires the cooperation of the bearing. At the same time, in order to reduce the noise generated by the tensioner during use, the corresponding bearing on the tensioner will also choose a low-noise bearing.
[0003] The low-noise bearing includes an outer ring, an inner ring, balls and a sealing end cover. The outer ring is sleeved on the inner ring, the balls are located between the outer ring and the inner ring, and the sealing end cover is located between the outer ring and the inner ring to cover the opening formed by the outer ring and the inner ring. The inner circumferential wall of the outer ring and the outer circumferential wall of the inner ring are provided with grooves for the balls to fit in and roll. Before the low-noise bearing leaves the factory, grease is injected into the balls, and then the sealing end cover is pressed against the outer ring and the inner ring.
[0004] Since the fluidity of grease is poor, most of the grease will accumulate somewhere inside the bearing as the bearing rotates, so the bearing needs to be regularly greased after a period of use. In the related technology, when adding grease, the staff needs to remove the sealing end cover first, then squeeze the grease into the ball, and then install the sealing end cover, which makes the whole process of adding grease more cumbersome and inconvenient. Utility Model Content
[0005] In order to improve the convenience of adding grease into a bearing, the present application provides a low-noise automobile tensioner bearing.
[0006] The present application provides a low-noise automobile tensioner bearing, which adopts the following technical solution:
[0007] A low-noise automobile tensioner bearing comprises a bearing inner ring, a bearing outer ring sleeved on the bearing inner ring, a ball rollingly installed between the bearing inner ring and the bearing outer ring, and a grease injection end cover, wherein two grease injection end covers are provided, and the two grease injection end covers are respectively located on both sides of the ball along the axial direction of the bearing inner ring, and an annular groove for storing grease is provided on the side of the grease injection end cover away from the ball, and an extrusion cover ring is provided at the notch of the annular groove, and the extrusion cover ring is made of elastic material, and a grease flow channel is provided at the bottom of the annular groove so that the grease can flow onto the ball after being squeezed.
[0008] Preferably, a groove for the ball part to be inserted and roll is provided on the inner wall of the bearing outer ring, a grease channel is provided inside the bearing outer ring, and the grease channel and the groove are both connected to the grease channel.
[0009] Preferably, the grease channel includes a main channel and a branch channel, the main channel is connected to the grease flow channel, one end of the branch channel is connected to the main channel, and the other end is connected to the groove, a plurality of branch channels are provided, the plurality of branch channels are arranged at intervals, and the plurality of branch channels are all connected to the main channel and the groove.
[0010] Preferably, the inner diameter of the main channel is larger than the inner diameter of the grease flow channel.
[0011] Preferably, the outer wall of the grease injection end cover is provided with an outer convex ring, the inner wall of the bearing outer ring is provided with an inner ring groove for inserting the outer convex ring, the inner wall of the grease injection end cover is provided with an inner convex ring, and the outer wall of the bearing inner ring is provided with an outer ring groove for inserting the inner convex ring.
[0012] Preferably, the grease flow channel is communicated with the inner ring groove, and the main channel is also communicated with the inner ring groove.
[0013] Preferably, a positioning protrusion is provided on the outer wall of the grease injection end cover, and a positioning groove for inserting the positioning protrusion is provided on the outer ring of the bearing.
[0014] Preferably, the side of the extruded cover ring facing away from the ball does not protrude from the bearing outer ring, ie, the bearing inner ring.
[0015] In summary, the present application includes at least one of the following beneficial technical effects:
[0016] 1. When the bearing needs to be added with grease after being used for a period of time, the staff can apply force to the extrusion cover ring to squeeze the extrusion cover ring. During this process, the grease in the annular groove will be squeezed into the grease flow channel, then into the grease channel, and finally into the groove and adhere to the ball to achieve grease addition. The above structure only needs to apply force to the extrusion cover ring when adding grease, thereby making the process of adding grease to the bearing more convenient;
[0017] 2. Since the ball is mainly in contact with the groove wall of the inner groove of the bearing outer ring, the provision of the branch channel enables the grease to be directly injected into the groove, thereby improving the lubrication effect on the ball;
[0018] 3. When the grease injection end cap is installed, the cooperation of the positioning protrusion and the positioning groove can ensure that the grease flow channel can accurately correspond to and connect with the main channel, so that the grease can accurately enter the grease channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of a bearing in an embodiment of the present application.
[0020] Figure 2 yes Figure 1 Enlarged view of part A in the middle.
[0021] Figure 3 It is an exploded schematic diagram of the bearing and the grease injection end cover in the embodiment of the present application.
[0022] Explanation of the reference numerals: 1. bearing inner ring; 11. outer ring groove; 2. bearing outer ring; 21. groove; 22. inner ring groove; 23. grease channel; 24. main channel; 25. branch channel; 26. positioning groove; 3. ball; 4. grease injection end cover; 41. outer convex ring; 42. inner convex ring; 43. annular groove; 44. extrusion cover ring; 45. grease flow channel; 46. positioning protrusion. DETAILED DESCRIPTION
[0023] The following is combined with Figure 1-3 This application is described in further detail.
[0024] The present application embodiment discloses a low-noise automobile tensioner bearing. Figure 1 The low-noise automobile tensioner bearing includes a bearing inner ring 1, a bearing outer ring 2, a ball 3 and a grease injection end cover 4. The bearing outer ring 2 is sleeved on the bearing inner ring 1, the central axis of the bearing outer ring 2 coincides with the central axis of the bearing inner ring 1, and the inner diameter of the bearing outer ring 2 is larger than the outer diameter of the bearing inner ring 1. There are multiple balls 3, and the multiple balls 3 are all rolled and installed between the bearing outer ring 2 and the bearing inner ring 1, and the multiple balls 3 are arranged at intervals on the outer circumference of the bearing outer ring 2. There are two grease injection end covers 4, and the two grease injection end covers 4 are symmetrical along the axial direction of the bearing outer ring 2 and are arranged at intervals on both sides of the ball 3; the two grease injection end covers 4 are both located between the bearing outer ring 2 and the bearing inner ring 1 to prevent dust from entering the bearing. Grease is injected into the grease injection end cover 4. When grease needs to be added to the inside of the bearing, it is only necessary to squeeze the grease injection end cover 4, which is more convenient.
[0025] Reference Figure 1 and Figure 2 A groove 21 is provided on the inner circumferential wall of the bearing outer ring 2 for the ball 3 to partially fit in and roll. Similarly, a groove 21 is also provided on the outer circumferential wall of the bearing inner ring 1 for the ball 3 to partially fit in and roll, thereby making it difficult for the ball 3 to come out from between the bearing outer ring 2 and the bearing inner ring 1 after installation.
[0026] Reference Figure 1 and Figure 2The structures of the two grease injection end caps 4 are the same, and the structure of one grease injection end cap 4 is used as an example for explanation. An outer convex ring 41 is integrally formed on the outer wall of the grease injection end cap 4, and an inner ring groove 22 for inserting the outer convex ring 41 is provided on the inner peripheral wall of the bearing outer ring 2; an inner convex ring 42 is integrally formed on the inner wall of the grease injection end cap 4, and an outer ring groove 11 for inserting the inner convex ring 42 is provided on the outer peripheral wall of the bearing inner ring 1, so that the grease injection end cap 4 can be installed on the bearing outer ring 2 and the bearing inner ring 1, and at the same time, the grease injection end cap 4 can seal the ball 3 between the bearing outer ring 2 and the bearing inner ring 1, so that dust is not easy to enter.
[0027] Combination Figure 1 Reference Figure 2 and Figure 3 , an annular groove 43 is provided on the side of the grease injection end cover 4 facing away from the ball 3, and grease can be injected into the annular groove 43 for storage. An extrusion cover ring 44 is provided at the notch of the annular groove 43, and the extrusion cover ring 44 can completely cover the annular groove 43. The extrusion cover ring 44 is glued to the grease injection end cover 4 by glue, so that the grease in the annular groove 43 is not easy to leak from the notch of the annular groove 43. In addition, the side of the extrusion cover ring 44 facing away from the ball 3 does not protrude from the outer ring 2 of the bearing, that is, the inner ring 1 of the bearing, so that the extrusion cover ring 44 does not interfere with the other components. Among them, the extrusion cover ring 44 is made of elastic material, so when the extrusion cover ring 44 is squeezed, it can be driven to deform, and then the grease in the annular groove 43 is injected onto the ball 3.
[0028] Combination Figure 1 Reference Figure 2 and Figure 3 Specifically, a grease flow channel 45 is provided at the bottom of the annular groove 43, and a grease channel 23 is provided inside the bearing outer ring 2. The grease channel 23 is connected to the grease flow channel 45, and the grease channel 23 is connected to the groove 21 on the bearing outer ring 2. When the extrusion cover ring 44 is squeezed, the grease in the annular groove 43 will enter the grease channel 23 through the grease flow channel 45, and then the grease will enter the groove 21 of the bearing outer ring 2 and adhere to the ball 3. As the ball 3 rolls and rotates, the grease will cover the entire ball 3.
[0029] Since there are multiple balls 3, there are multiple grease channels 45 and multiple grease channels 23, and the number of grease channels 45 is consistent with the number of grease channels 23 and corresponds one to one. The multiple grease channels 45 and the multiple grease channels 23 are arranged at intervals along the circumference of the bearing outer ring 2. The following is an example of the matching structure of a grease channel 45 and a grease channel 23.
[0030] Combination Figure 1 Reference Figure 2 and Figure 3 The grease channel 45 is gradually inclined toward the direction close to the ball 3 along the radial direction from the inner convex ring 42 to the outer convex ring 41, and the end of the grease channel 45 close to the grease channel 23 passes through the outer convex ring 41 and communicates with the inner ring groove 22. The grease channel 23 includes a main channel 24 and a plurality of branch channels 25, which are arranged in intervals along the axial direction of the bearing outer ring 2 in the bearing outer ring 2, and the plurality of branch channels 25 are all connected to the main channel 24 and the groove 21. One end of the main channel 24 is connected to the inner ring groove 22, so that the main channel 24 is connected to the grease channel 45.
[0031] Combination Figure 1 Reference Figure 2 and Figure 3 , wherein the inner diameter of the main channel 24 is larger than the inner diameter of the grease flow channel 45 , thereby allowing the grease in the grease flow channel 45 to flow into the main channel 24 more smoothly.
[0032] In order to ensure that the grease flow channel 45 and the main channel 24 are accurately aligned during the rotation of the bearing outer ring 2, a positioning protrusion 46 is integrally formed on the outer wall of the grease injection end cover 4, and a positioning groove 26 for the positioning protrusion 46 to be inserted is provided on the bearing outer ring 2. The depth of the positioning groove 26 along the radial direction of the grease injection end cover 4 is less than the depth of the inner ring groove 22 along the radial direction of the grease injection end cover 4, thereby making it difficult for dust to enter the bearing through the positioning groove 26. There are multiple positioning protrusions 46, and the multiple positioning protrusions 46 are arranged at intervals circumferentially on the grease injection end cover 4; correspondingly, there are also multiple positioning grooves 26, and the number of positioning grooves 26 is consistent with the number of positioning protrusions 46 and corresponds one to one. Therefore, when the bearing outer ring 2 rotates, the grease injection end cover 4 can rotate synchronously with the bearing outer ring 2.
[0033] The implementation principle of a low-noise automobile tensioner bearing in the embodiment of the present application is as follows: when grease needs to be added to the bearing after the bearing has been used for a period of time, the staff can apply force to the extrusion cover ring 44 to squeeze the extrusion cover ring 44. During this process, the grease in the annular groove 43 will be squeezed into the grease flow channel 45, then enter the grease channel 23, and finally enter the groove 21 and adhere to the ball 3 to achieve the addition of grease. Since the ball 3 is mainly in contact with the groove wall of the groove 21 in the outer ring 2 of the bearing, the setting of the branch channel 25 can enable the grease to be directly injected into the groove 21, thereby improving the lubrication effect on the ball 3; when the grease injection end cover 4 is installed, the cooperation of the positioning protrusion 46 and the positioning groove 26 can ensure that the grease flow channel 45 can accurately correspond to and communicate with the main channel 24, thereby enabling the grease to accurately enter the grease channel 23.
[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A low-noise automobile tensioner bearing, characterized in that: The invention comprises a bearing inner ring (1), a bearing outer ring (2) sleeved on the bearing inner ring (1), a ball (3) rollingly mounted between the bearing inner ring (1) and the bearing outer ring (2), and a grease injection end cover (4), wherein two grease injection end covers (4) are provided, and the two grease injection end covers (4) are respectively located on both sides of the ball (3) along the axial direction of the bearing inner ring (1), and an annular groove (43) for storing grease is provided on a side of the grease injection end cover (4) away from the ball (3), and an extrusion cover ring (44) is provided at the notch of the annular groove (43), and the extrusion cover ring (44) is made of elastic material, and a grease flow channel (45) is provided at the bottom of the annular groove (43) so that the grease can flow onto the ball (3) after being squeezed.
2. The low-noise automobile tensioner bearing according to claim 1, characterized in that: The inner wall of the bearing outer ring (2) is provided with a groove (21) for the ball (3) to partially fit in and roll on, and a grease channel (23) is provided inside the bearing outer ring (2), and the grease channel (45) and the groove (21) are both connected to the grease channel (23).
3. The low-noise automobile tensioner bearing according to claim 2, characterized in that: The grease channel (23) comprises a main channel (24) and a branch channel (25), wherein the main channel (24) is connected to the grease flow channel (45), one end of the branch channel (25) is connected to the main channel (24), and the other end is connected to the groove (21), a plurality of branch channels (25) are provided, the plurality of branch channels (25) are arranged at intervals, and the plurality of branch channels (25) are all connected to the main channel (24) and the groove (21).
4. The low-noise automobile tensioner bearing according to claim 3, characterized in that: The inner diameter of the main channel (24) is greater than the inner diameter of the grease flow channel (45).
5. The low-noise automobile tensioner bearing according to claim 3, characterized in that: The outer wall of the grease injection end cover (4) is provided with an outer convex ring (41), the inner wall of the bearing outer ring (2) is provided with an inner ring groove (22) for inserting the outer convex ring (41), the inner wall of the grease injection end cover (4) is provided with an inner convex ring (42), and the outer wall of the bearing inner ring (1) is provided with an outer ring groove (11) for inserting the inner convex ring (42).
6. The low-noise automobile tensioner bearing according to claim 5, characterized in that: The grease flow channel (45) is in communication with the inner annular groove (22), and the main channel (24) is also in communication with the inner annular groove (22).
7. A low-noise automobile tensioner bearing according to claim 6, characterized in that: A positioning protrusion (46) is provided on the outer wall of the grease injection end cover (4), and a positioning groove (26) for the positioning protrusion (46) to be inserted is provided on the bearing outer ring (2).
8. The low-noise automobile tensioner bearing according to claim 7, characterized in that: The side of the extrusion cover ring (44) facing away from the ball (3) does not protrude from the bearing outer ring (2), that is, the bearing inner ring (1).