Bearing seat

Abstract

The utility model discloses a bearing seat which comprises a cylindrical shell and a main shaft arranged on the shell in a penetrating mode, and the two ends of the main shaft are rotatably supported in the shell through bearings. A first end cover is arranged at one end of the shell; the inner diameter of the first end cover is matched with the outer diameter of a corresponding position on the main shaft, and the first end cover is in clearance fit with the main shaft; an annular groove extending in the circumferential direction is formed in the inner wall of the first end cover, and air inlet holes used for being connected with positive pressure gas are formed in the bottom of the annular groove in a penetrating mode. The bearing seat has the advantages of being ingenious in structural design, capable of slowing down or reducing impurity accumulation on the bearing seat, beneficial to prolonging the service life and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of gear detection, in particular to a bearing seat. Background Art

[0002] During the manufacturing process, the tooth surfaces of gear pairs are affected by processing and manufacturing factors, which introduce additional errors. This causes the gear pairs to be stimulated by meshing forces during the meshing transmission process and generate additional vibration noise. In traditional fuel vehicles, the noise from the engine and other components will mask the noise between the gear pairs. However, in new energy electric vehicles, due to the low operating noise of the motor itself, the noise of the gear pairs will be extremely obvious, seriously affecting the comfort of the entire vehicle. For this reason, it is necessary to perform noise testing on the gear pairs during the off-line manufacturing stage. During the test, the two ends of the gear shaft are coaxially clamped on the test equipment through a vertically arranged top mechanism. During the test, lubricating oil mist and fine impurities may fall into the bearing clearance of the top mechanism below. Long-term accumulation will reduce the service life of the bearing seat. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a bearing seat with an ingenious structural design that can slow down or reduce the accumulation of impurities on the bearing seat and help extend its service life.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A bearing seat comprises a cylindrical shell and a main shaft passing through the shell, wherein both ends of the main shaft are rotatably supported in the shell by bearings; a first end cover is provided at one end of the shell; the inner diameter of the first end cover matches the outer diameter of the corresponding position on the main shaft and is loosely fitted on the main shaft; an annular groove extending circumferentially is provided on the inner wall of the first end cover, and an air inlet hole for connecting positive pressure gas is provided through the bottom of the annular groove.

[0006] During use, the air inlet is connected to an air source, and positive pressure gas enters the annular groove through the air inlet, generating positive pressure. Since there is a clearance fit between the first end cover and the main shaft, the positive pressure gas in the annular groove is blown outward from the gap between the two, thereby preventing impurities from accumulating in the gap between the main shaft and the second end cover or entering the housing. This can slow down or reduce the accumulation of impurities and help extend the service life of the bearing seat.

[0007] Furthermore, an inner spacer is provided on the main shaft, and the two ends of the inner spacer are respectively abutted on the inner rings of the bearings at both ends; an outer spacer is embedded in the shell, the inner diameter of the outer spacer is larger than the outer diameter of the inner spacer, and the two ends are respectively abutted on the outer rings of the bearings at both ends.

[0008] Furthermore, the shell has a temperature measuring threaded hole arranged to penetrate in the radial direction, and there are two temperature measuring threaded holes, which are respectively opposite to the bearings at both ends; and a temperature sensor is installed on the temperature measuring threaded hole.

[0009] Furthermore, one end of the main shaft protrudes radially outward toward the first end cover to form a connector, and the outer diameter of the connector matches the inner diameter of the first end cover; the end of the connector has a coaxially arranged centering hole, and the diameter of the centering hole gradually increases from the inside to the outside.

[0010] Furthermore, the main shaft has an abutment section connected to the connector, and the outer diameter of the abutment section matches the outer diameter of the bearing inner ring.

[0011] Furthermore, the other end of the main shaft has a threaded section and is equipped with a locking nut; an abutment sleeve is sleeved on the main shaft, one end of the abutment sleeve abuts against the inner ring of the bearing, and the other end abuts against the locking nut.

[0012] Furthermore, a second end cover is provided at the other end of the shell.

[0013] Furthermore, both ends of the shell have threaded holes distributed along the circumferential direction, and the first end cover and the second end cover both have bolt holes corresponding to the threaded holes and are mounted on the shell by bolts.

[0014] Furthermore, two ends of the main shaft are respectively provided with two angular contact bearings mounted in a back-to-back manner.

[0015] Furthermore, the shell has a flange protruding radially outward.

[0016] In summary, the utility model has the advantages of clever structural design, being able to slow down or reduce the accumulation of impurities on the bearing seat, and being conducive to extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of this embodiment.

[0018] Figure 2 and Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the embodiments.

[0020] When implementing: Figures 1 to 3The figure shows a bearing seat comprising a cylindrical housing 1 and a spindle 2 passing through the housing 1. The spindle 2 is rotatably supported within the housing 1 at both ends by bearings. A first end cap 12 is provided at one end of the housing 1, and a second end cap 14 is provided at the other end. Both the first and second end caps 12 and 14 have top sleeves protruding toward the housing 1. The outer diameters of the top sleeves match the inner diameter of the housing 1 and abut against the corresponding bearing outer rings. Circumferentially distributed threaded holes are provided at both ends of the housing 1. Both the first and second end caps 12 and 14 have bolt holes corresponding to the threaded holes and are mounted to the housing 1 by bolts. The inner diameter of the first end cap 12 matches the outer diameter of the corresponding positions on the spindle 2 and provides a clearance fit on the spindle 2. The inner wall of the first end cap 12 has an annular groove extending circumferentially. An air inlet for connecting to a positive pressure gas is provided through the bottom of the annular groove. To facilitate connection to the gas source, a pneumatic connector is mounted on the air inlet.

[0021] To facilitate vertical installation of the housing 1, the housing 1 has a flange 11 protruding radially outward. An inner spacer 21 is sleeved on the main shaft 2, with its ends abutting the inner rings of the bearings at both ends. An outer spacer 13 is embedded in the housing 1. The inner diameter of the outer spacer 13 is larger than the outer diameter of the inner spacer 21, and its ends abut the outer rings of the bearings at both ends. Specifically, each end of the main shaft 2 has two angular contact bearings mounted back to back. The housing 1 has two temperature measuring threaded holes extending radially through it, each facing the bearings at both ends. Temperature sensors 5 are mounted on each of the temperature measuring threaded holes.

[0022] In this embodiment, one end of the main shaft 2, facing the first end cap 12, protrudes radially outward to form a connector. The outer diameter of the connector matches the inner diameter of the first end cap 12. The end of the connector has a coaxial centering hole, the diameter of which gradually increases from the inside out. The main shaft 2 has an abutment section that engages with the connector. The outer diameter of the abutment section matches the outer diameter of the bearing inner ring. The other end of the main shaft 2 has a threaded section that is fitted with a lock nut 3. An abutment sleeve 4 is sleeved on the main shaft 2. One end of the abutment sleeve 4 abuts the inner ring of the bearing and the other end abuts the lock nut 3.

[0023] During use, the air inlet is connected to an air source, and positive pressure gas enters the annular groove through the air inlet, generating positive pressure. Since there is a clearance fit between the first end cover and the main shaft, the positive pressure gas in the annular groove is blown outward from the gap between the two, thereby preventing impurities from accumulating in the gap between the main shaft and the second end cover or entering the housing. This can slow down or reduce the accumulation of impurities and help extend the service life of the bearing seat.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A bearing seat, characterized in that: The invention comprises a cylindrical shell (1) and a main shaft (2) passing through the shell (1), wherein both ends of the main shaft (2) are rotatably supported in the shell (1) by bearings; a first end cover (12) is provided at one end of the shell (1); the inner diameter of the first end cover (12) matches the outer diameter of a corresponding position on the main shaft (2) and is loosely fitted on the main shaft (2); an annular groove extending in a circumferential direction is provided on the inner wall of the first end cover (12), and an air inlet hole for connecting a positive pressure gas is provided through the bottom of the annular groove.

2. The bearing seat according to claim 1, wherein: An inner spacer (21) is sleeved on the main shaft (2), and two ends of the inner spacer (21) respectively abut against the inner rings of the bearings at both ends; an outer spacer (13) is embedded in the housing (1), and the inner diameter of the outer spacer (13) is larger than the outer diameter of the inner spacer (21), and two ends respectively abut against the outer rings of the bearings at both ends.

3. The bearing seat according to claim 1, wherein: The housing (1) is provided with a temperature measuring threaded hole which is arranged to penetrate in the radial direction. Two temperature measuring threaded holes are provided and are respectively opposite to the bearings at both ends. A temperature sensor is installed on the temperature measuring threaded hole.

4. The bearing seat according to claim 1, wherein: One end of the main shaft (2) protrudes radially outward toward the first end cover (12) to form a connector, the outer diameter of the connector matching the inner diameter of the first end cover (12); the end of the connector has a coaxially arranged centering hole, the diameter of the centering hole gradually increasing from the inside to the outside.

5. The bearing seat according to claim 4, characterized in that The main shaft (2) has an abutment section connected to the connector, and the outer diameter of the abutment section matches the outer diameter of the bearing inner ring.

6. The bearing seat according to claim 4, wherein: The other end of the main shaft (2) has a threaded section and is fitted with a locking nut (3); an abutment sleeve (4) is sleeved on the main shaft (2), one end of the abutment sleeve (4) abuts against the inner ring of the bearing, and the other end abuts against the locking nut (3).

7. The bearing seat according to claim 1, wherein: The other end of the housing (1) is provided with a second end cover (14).

8. The bearing seat according to claim 7, wherein: Both ends of the housing (1) have threaded holes distributed along the circumference, and the first end cover (12) and the second end cover (14) both have bolt holes corresponding to the threaded holes and are mounted on the housing (1) by bolts.

9. The bearing seat according to claim 1, wherein: The two ends of the main shaft (2) each have two angular contact bearings mounted in a back-to-back manner.

10. The bearing seat according to claim 1, wherein: The housing (1) is provided with a flange (11) protruding radially outward.

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