Matching structure of shaft piece and bearing and engine cylinder head
By using a combined structure of an O-shaped sealing ring and annular sealing groove between the shaft member and the bearing inner ring, the wear and sealing problems caused by the relative movement of the shaft member and the bearing inner ring are solved, and the shaft member and the bearing inner ring are realized. The relative static and effective sealing extends the service life.
Patent Information
- Application Number
- CN202421101827.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In mechanical structures, relative movement of the shaft member and the inner ring of the bearing leads to wear and sealing, and it is difficult for the prior art to effectively reduce wear and maintain sealing.
The combination structure of O-shaped sealing ring and annular sealing groove is adopted to keep the shaft member and the inner ring of the bearing relatively stationary, and the seal is achieved through the compression deformation of the O-shaped sealing ring. The groove width is larger than the width of the sealing ring, and the compression deformation rate is 15-35%. .
It effectively avoids wear of the shaft member, maintains the sealing between the shaft member and the bearing inner ring, and extends the service life.
Smart Images
Figure CN222254099U_ABST
Abstract
Description
Technical field:
[0001] The utility model belongs to the technical field of mechanical shaft assembly structure, in particular to a matching structure of a shaft and a bearing and an engine cylinder head. Background technology:
[0002] In mechanical structure design, when the shaft is fixed to the machine body through the bearing, the outer ring of the bearing will be tightly fixed to the machine body to support the bearing. Correspondingly, the end of the shaft can only be loosely fitted on the inner ring of the bearing. In some specific use occasions, the shaft and the inner ring of the bearing need to be relatively still as much as possible to reduce the wear of the shaft, and the gap between the shaft and the inner ring of the bearing has sealing requirements. However, even if the gap between the shaft and the inner ring of the bearing is reduced to control oil leakage and ensure sealing, there will always be relative movement between the shaft and the inner ring of the bearing. After long-term operation, the shaft is prone to wear with the inner ring of the bearing, which will cause the gap between the two to become larger and the sealing to deteriorate. Summary of the invention:
[0003] The utility model aims to provide a matching structure of a shaft and a bearing and an engine cylinder head, which can keep the shaft and the inner ring of the bearing relatively still and effectively sealed by means of an O-ring to effectively avoid wear of the shaft.
[0004] The utility model is achieved in this way:
[0005] The matching structure of the shaft and the bearing includes a shaft and a bearing, wherein the inner ring of the bearing is sleeved on the connecting end of the shaft, and the outer ring is fixedly matched with the body, and an annular sealing groove is provided on the outer wall surface of the shaft sleeved on the inner ring of the bearing, and an O-ring is sleeved in the annular sealing groove and is sealed against the inner ring of the bearing.
[0006] In the above-mentioned matching structure of the shaft and the bearing, the width of the annular sealing groove is greater than the width of the O-ring.
[0007] In the above-mentioned matching structure of the shaft and the bearing, the compression deformation of the O-ring sleeved between the annular sealing groove and the bearing is 15-35%.
[0008] In the above-mentioned matching structure of the shaft and the bearing, an oil passage is provided on the body located at the connecting end of the shaft and the outer side of the bearing, and an inner shaft oil passage communicating with the oil passage is opened on the end face of the connecting end of the shaft.
[0009] Another object of the utility model is to provide an engine cylinder head, comprising a matching structure of a shaft and a bearing as described in any one of the above items, wherein the engine body is a cylinder head, and the shaft is a camshaft rotatably matched on the cylinder head.
[0010] The outstanding advantages of the utility model compared with the prior art are:
[0011] The utility model has a simple structure, reasonable design and low cost. An O-ring is added between the shaft and the inner ring of the bearing. The compression deformation of the O-ring is used to keep the shaft and the inner ring of the bearing relatively still and effectively sealed, so as to effectively avoid wear of the shaft. Description of the drawings:
[0012] Figure 1 It is a structural diagram of the utility model applied to the cylinder head of an engine.
[0013] In the figure: 1. shaft; 2. bearing; 3. machine body; 4. O-ring; 5. oil passage; 6. oil passage in the shaft. Specific implementation method:
[0014] The present invention is further described below with reference to specific embodiments. Figure 1 :
[0015] The matching structure of the shaft and the bearing includes a shaft 1 and a bearing 2. The inner ring of the bearing 2 is sleeved on the connecting end of the shaft 1, and the outer ring is fixedly matched with the body 3. An annular sealing groove is provided on the outer wall surface of the shaft 1 sleeved on the inner ring of the bearing 2, and an O-ring is sleeved in the annular sealing groove to seal against the inner ring of the bearing 2.
[0016] The utility model has a simple structure, reasonable design and low cost. An O-ring is added between the shaft 1 and the inner ring of the bearing 2. The compression deformation of the O-ring is used to keep the shaft 1 and the inner ring of the bearing 2 relatively still and effectively sealed, so as to effectively avoid wear of the shaft 1.
[0017] Furthermore, in order to facilitate the compression deformation of the O-ring and effectively act on the inner ring of the bearing 2, the width of the annular sealing groove is greater than the width of the O-ring.
[0018] At the same time, in order to ensure that the shaft 1 and the inner ring of the bearing 2 remain relatively still and effectively sealed, the compression deformation of the O-ring sleeved between the annular sealing groove and the bearing 2 is 15-35%.
[0019] Moreover, during actual use, the matching structure of the shaft 1 and the bearing 2 on the body 3 is as follows: an oil passage 5 is provided on the body 3 located at the connecting end of the shaft 1 and the outer side of the bearing 2, and an inner shaft oil passage 6 connected to the oil passage 5 is opened on the end face of the connecting end of the shaft 1.
[0020] In this embodiment, the utility model is applied to the engine cylinder head, that is, it includes the matching structure of the shaft member 1 and the bearing 2 as described in any one of the above items, the body 3 is the cylinder head, and the shaft member 1 is the camshaft rotatably matched on the cylinder head.
[0021] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A shaft and bearing matching structure, comprising a shaft (1) and a bearing (2), wherein the inner ring of the bearing (2) is sleeved on the connecting end of the shaft (1), and the outer ring is fixedly matched with the body (3), and is characterized in that: An annular sealing groove is provided on the outer wall surface of the shaft member (1) sleeved on the inner ring of the bearing (2), and an O-shaped sealing ring (4) is sleeved in the annular sealing groove and abuts against and seals the inner ring of the bearing (2).
2. The matching structure of the shaft and the bearing according to claim 1 is characterized in that: The width of the annular sealing groove is greater than the width of the O-shaped sealing ring (4).
3. The matching structure of the shaft and the bearing according to claim 1 or 2, characterized in that: The O-shaped sealing ring (4) sleeved between the annular sealing groove and the bearing (2) has a compression deformation of 15-35%.
4. The matching structure of the shaft and the bearing according to claim 1 is characterized in that: An oil passage (5) is provided on the body (3) located at the connecting end of the shaft (1) and outside the bearing (2), and an inner shaft oil passage (6) communicating with the oil passage (5) is provided on the connecting end surface of the shaft (1).
5. Engine cylinder head, characterized in that: It comprises the matching structure of the shaft and the bearing as described in any one of claims 1 to 4, the body (3) is a cylinder head, and the shaft (1) is a camshaft rotatably matched on the cylinder head.